├── app
    ├── .gitignore
    ├── src
    │   ├── main
    │   │   ├── res
    │   │   │   ├── mipmap-hdpi
    │   │   │   │   ├── ic_launcher.png
    │   │   │   │   └── ic_launcher_round.png
    │   │   │   ├── mipmap-mdpi
    │   │   │   │   ├── ic_launcher.png
    │   │   │   │   └── ic_launcher_round.png
    │   │   │   ├── mipmap-xhdpi
    │   │   │   │   ├── ic_launcher.png
    │   │   │   │   └── ic_launcher_round.png
    │   │   │   ├── mipmap-xxhdpi
    │   │   │   │   ├── ic_launcher.png
    │   │   │   │   └── ic_launcher_round.png
    │   │   │   ├── mipmap-xxxhdpi
    │   │   │   │   ├── ic_launcher.png
    │   │   │   │   └── ic_launcher_round.png
    │   │   │   ├── drawable-hdpi
    │   │   │   │   └── ic_content_add.png
    │   │   │   ├── drawable-mdpi
    │   │   │   │   └── ic_content_add.png
    │   │   │   ├── drawable-xhdpi
    │   │   │   │   └── ic_content_add.png
    │   │   │   ├── drawable-xxhdpi
    │   │   │   │   └── ic_content_add.png
    │   │   │   ├── drawable-xxxhdpi
    │   │   │   │   └── ic_content_add.png
    │   │   │   ├── values
    │   │   │   │   ├── ids.xml
    │   │   │   │   ├── colors.xml
    │   │   │   │   ├── dimens.xml
    │   │   │   │   ├── strings.xml
    │   │   │   │   └── styles.xml
    │   │   │   ├── layout
    │   │   │   │   ├── content_main.xml
    │   │   │   │   ├── empty_view.xml
    │   │   │   │   ├── todo_item.xml
    │   │   │   │   ├── fragment_todos.xml
    │   │   │   │   └── activity_main.xml
    │   │   │   └── menu
    │   │   │   │   └── menu_main.xml
    │   │   ├── java
    │   │   │   └── com
    │   │   │   │   └── easy
    │   │   │   │       └── kotlin
    │   │   │   │           └── mytodoapplication
    │   │   │   │               └── TAG.java
    │   │   ├── kotlin
    │   │   │   └── com
    │   │   │   │   └── easy
    │   │   │   │       └── kotlin
    │   │   │   │           └── mytodoapplication
    │   │   │   │               ├── model
    │   │   │   │                   └── Todo.kt
    │   │   │   │               ├── MyTodoApplication.kt
    │   │   │   │               ├── TodoAdapter.kt
    │   │   │   │               ├── TodosFragment.kt
    │   │   │   │               ├── MainActivity.kt
    │   │   │   │               └── TodoEditFragment.kt
    │   │   └── AndroidManifest.xml
    │   ├── test
    │   │   └── java
    │   │   │   └── com
    │   │   │       └── easy
    │   │   │           └── kotlin
    │   │   │               └── mytodoapplication
    │   │   │                   └── ExampleUnitTest.java
    │   └── androidTest
    │   │   └── java
    │   │       └── com
    │   │           └── easy
    │   │               └── kotlin
    │   │                   └── mytodoapplication
    │   │                       └── ExampleInstrumentedTest.java
    ├── proguard-rules.pro
    └── build.gradle
├── settings.gradle
├── gradle
    └── wrapper
    │   ├── gradle-wrapper.jar
    │   └── gradle-wrapper.properties
├── .gitignore
├── gradle.properties
├── gradlew.bat
├── gradlew
└── README.md


/app/.gitignore:
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1 | /build
2 | 


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/settings.gradle:
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1 | include ':app'
2 | 


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/gradle/wrapper/gradle-wrapper.jar:
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https://raw.githubusercontent.com/EasyKotlin/chapter13_kotlin_android/HEAD/gradle/wrapper/gradle-wrapper.jar


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/app/src/main/res/mipmap-hdpi/ic_launcher.png:
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https://raw.githubusercontent.com/EasyKotlin/chapter13_kotlin_android/HEAD/app/src/main/res/mipmap-hdpi/ic_launcher.png


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/app/src/main/res/mipmap-mdpi/ic_launcher.png:
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/app/src/main/res/mipmap-xhdpi/ic_launcher.png:
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/app/src/main/res/mipmap-xxhdpi/ic_launcher.png:
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/app/src/main/res/mipmap-xxxhdpi/ic_launcher.png:
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https://raw.githubusercontent.com/EasyKotlin/chapter13_kotlin_android/HEAD/app/src/main/res/mipmap-xxxhdpi/ic_launcher.png


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/app/src/main/res/drawable-hdpi/ic_content_add.png:
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https://raw.githubusercontent.com/EasyKotlin/chapter13_kotlin_android/HEAD/app/src/main/res/drawable-hdpi/ic_content_add.png


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/app/src/main/res/drawable-mdpi/ic_content_add.png:
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https://raw.githubusercontent.com/EasyKotlin/chapter13_kotlin_android/HEAD/app/src/main/res/drawable-mdpi/ic_content_add.png


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/app/src/main/res/drawable-xhdpi/ic_content_add.png:
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https://raw.githubusercontent.com/EasyKotlin/chapter13_kotlin_android/HEAD/app/src/main/res/drawable-xhdpi/ic_content_add.png


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/app/src/main/res/drawable-xxhdpi/ic_content_add.png:
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https://raw.githubusercontent.com/EasyKotlin/chapter13_kotlin_android/HEAD/app/src/main/res/drawable-xxhdpi/ic_content_add.png


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/app/src/main/res/mipmap-hdpi/ic_launcher_round.png:
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https://raw.githubusercontent.com/EasyKotlin/chapter13_kotlin_android/HEAD/app/src/main/res/mipmap-hdpi/ic_launcher_round.png


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/app/src/main/res/mipmap-mdpi/ic_launcher_round.png:
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https://raw.githubusercontent.com/EasyKotlin/chapter13_kotlin_android/HEAD/app/src/main/res/mipmap-mdpi/ic_launcher_round.png


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/app/src/main/res/mipmap-xhdpi/ic_launcher_round.png:
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https://raw.githubusercontent.com/EasyKotlin/chapter13_kotlin_android/HEAD/app/src/main/res/mipmap-xhdpi/ic_launcher_round.png


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/.gitignore:
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 1 | *.iml
 2 | .gradle
 3 | /local.properties
 4 | /.idea/workspace.xml
 5 | /.idea/libraries
 6 | .DS_Store
 7 | /build
 8 | /captures
 9 | .externalNativeBuild
10 | 


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/app/src/main/res/drawable-xxxhdpi/ic_content_add.png:
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https://raw.githubusercontent.com/EasyKotlin/chapter13_kotlin_android/HEAD/app/src/main/res/drawable-xxxhdpi/ic_content_add.png


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/app/src/main/res/mipmap-xxhdpi/ic_launcher_round.png:
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/app/src/main/res/mipmap-xxxhdpi/ic_launcher_round.png:
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https://raw.githubusercontent.com/EasyKotlin/chapter13_kotlin_android/HEAD/app/src/main/res/mipmap-xxxhdpi/ic_launcher_round.png


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/app/src/main/res/values/ids.xml:
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1 | <?xml version="1.0" encoding="utf-8"?>
2 | <resources>
3 |     <item name="todo_title" type="id" />
4 |     <item name="todo_content" type="id" />
5 |     <item name="todo_add" type="id" />
6 | </resources>


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/app/src/main/java/com/easy/kotlin/mytodoapplication/TAG.java:
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 1 | package com.easy.kotlin.mytodoapplication;
 2 | 
 3 | /**
 4 |  * Created by jack on 2017/7/20.
 5 |  */
 6 | 
 7 | public class TAG {
 8 |     public static final String MY_TAG = "MY_TODOS";
 9 | }
10 | 


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/app/src/main/res/values/colors.xml:
--------------------------------------------------------------------------------
1 | <?xml version="1.0" encoding="utf-8"?>
2 | <resources>
3 |     <color name="colorPrimary">#f2fced</color>
4 |     <color name="colorPrimaryDark">#456a7c</color>
5 |     <color name="colorAccent">#8fb3c4</color>
6 | </resources>
7 | 


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/gradle/wrapper/gradle-wrapper.properties:
--------------------------------------------------------------------------------
1 | #Thu Jul 20 23:39:17 CST 2017
2 | distributionBase=GRADLE_USER_HOME
3 | distributionPath=wrapper/dists
4 | zipStoreBase=GRADLE_USER_HOME
5 | zipStorePath=wrapper/dists
6 | distributionUrl=https\://services.gradle.org/distributions/gradle-3.3-all.zip
7 | 


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/app/src/main/res/values/dimens.xml:
--------------------------------------------------------------------------------
1 | <resources>
2 |     <!-- Default screen margins, per the Android Design guidelines. -->
3 |     <dimen name="activity_horizontal_margin">16dp</dimen>
4 |     <dimen name="activity_vertical_margin">16dp</dimen>
5 |     <dimen name="fab_margin">16dp</dimen>
6 | </resources>
7 | 


--------------------------------------------------------------------------------
/app/src/main/res/values/strings.xml:
--------------------------------------------------------------------------------
 1 | <resources>
 2 |     <string name="app_name">我的日程</string>
 3 |     <string name="action_settings">设置</string>
 4 |     <string name="empty_todos_message">暂无待办事项，请添加</string>
 5 |     <string name="title_hint">标题</string>
 6 |     <string name="content_hint">待办内容</string>
 7 |     <string name="add_todo">添加</string>
 8 |     <string name="save">保存</string>
 9 | </resources>
10 | 


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/app/src/main/res/layout/content_main.xml:
--------------------------------------------------------------------------------
1 | <FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
2 |     xmlns:app="http://schemas.android.com/apk/res-auto"
3 |     xmlns:tools="http://schemas.android.com/tools"
4 |     android:id="@+id/content_main"
5 |     android:layout_width="match_parent"
6 |     android:layout_height="match_parent"
7 |     android:background="@color/colorPrimary"
8 |     app:layout_behavior="@string/appbar_scrolling_view_behavior" />
9 | 


--------------------------------------------------------------------------------
/app/src/main/res/menu/menu_main.xml:
--------------------------------------------------------------------------------
 1 | <menu xmlns:android="http://schemas.android.com/apk/res/android"
 2 |     xmlns:app="http://schemas.android.com/apk/res-auto"
 3 |     xmlns:tools="http://schemas.android.com/tools"
 4 |     tools:context="com.easy.kotlin.mytodoapplication.MainActivity">
 5 |     <item
 6 |         android:id="@+id/action_settings"
 7 |         android:orderInCategory="100"
 8 |         android:title="@string/action_settings"
 9 |         app:showAsAction="never" />
10 | </menu>
11 | 


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/app/src/main/kotlin/com/easy/kotlin/mytodoapplication/model/Todo.kt:
--------------------------------------------------------------------------------
 1 | package com.easy.kotlin.mytodoapplication.model
 2 | 
 3 | import io.realm.RealmObject
 4 | import io.realm.annotations.PrimaryKey
 5 | import io.realm.annotations.RealmClass
 6 | 
 7 | /**
 8 |  * Created by jack on 2017/7/21.
 9 |  */
10 | @RealmClass
11 | open class Todo : RealmObject() {
12 |     @PrimaryKey
13 |     open var id: String = "-1"
14 |     open var title: String = "日程"
15 |     open var content: String = "事项"
16 | }
17 | 


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/app/src/test/java/com/easy/kotlin/mytodoapplication/ExampleUnitTest.java:
--------------------------------------------------------------------------------
 1 | package com.easy.kotlin.mytodoapplication;
 2 | 
 3 | import org.junit.Test;
 4 | 
 5 | import static org.junit.Assert.*;
 6 | 
 7 | /**
 8 |  * Example local unit test, which will execute on the development machine (host).
 9 |  *
10 |  * @see <a href="http://d.android.com/tools/testing">Testing documentation</a>
11 |  */
12 | public class ExampleUnitTest {
13 |     @Test
14 |     public void addition_isCorrect() throws Exception {
15 |         assertEquals(4, 2 + 2);
16 |     }
17 | }
18 | 


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/app/src/main/res/layout/empty_view.xml:
--------------------------------------------------------------------------------
 1 | <?xml version="1.0" encoding="utf-8"?>
 2 | <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
 3 |               android:orientation="vertical"
 4 |               android:layout_width="match_parent"
 5 |               android:layout_height="match_parent">
 6 | 
 7 |     <TextView
 8 |         android:layout_width="match_parent"
 9 |         android:layout_height="match_parent"
10 |         android:gravity="center"
11 |         android:background="@color/colorPrimary"
12 |         android:text="@string/empty_todos_message"/>
13 | 
14 | </LinearLayout>


--------------------------------------------------------------------------------
/gradle.properties:
--------------------------------------------------------------------------------
 1 | # Project-wide Gradle settings.
 2 | 
 3 | # IDE (e.g. Android Studio) users:
 4 | # Gradle settings configured through the IDE *will override*
 5 | # any settings specified in this file.
 6 | 
 7 | # For more details on how to configure your build environment visit
 8 | # http://www.gradle.org/docs/current/userguide/build_environment.html
 9 | 
10 | # Specifies the JVM arguments used for the daemon process.
11 | # The setting is particularly useful for tweaking memory settings.
12 | org.gradle.jvmargs=-Xmx1536m
13 | 
14 | # When configured, Gradle will run in incubating parallel mode.
15 | # This option should only be used with decoupled projects. More details, visit
16 | # http://www.gradle.org/docs/current/userguide/multi_project_builds.html#sec:decoupled_projects
17 | # org.gradle.parallel=true
18 | 


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/app/src/main/res/values/styles.xml:
--------------------------------------------------------------------------------
 1 | <resources>
 2 | 
 3 |     <!-- Base application theme. -->
 4 |     <style name="AppTheme" parent="Theme.AppCompat.Light.DarkActionBar">
 5 |         <!-- Customize your theme here. -->
 6 |         <item name="colorPrimary">@color/colorPrimary</item>
 7 |         <item name="colorPrimaryDark">@color/colorPrimaryDark</item>
 8 |         <item name="colorAccent">@color/colorAccent</item>
 9 |     </style>
10 | 
11 |     <style name="AppTheme.NoActionBar">
12 |         <item name="windowActionBar">false</item>
13 |         <item name="windowNoTitle">true</item>
14 |     </style>
15 | 
16 |     <style name="AppTheme.AppBarOverlay" parent="ThemeOverlay.AppCompat.Dark.ActionBar" />
17 | 
18 |     <style name="AppTheme.PopupOverlay" parent="ThemeOverlay.AppCompat.Light" />
19 | 
20 | </resources>
21 | 


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/app/src/main/res/layout/todo_item.xml:
--------------------------------------------------------------------------------
 1 | <?xml version="1.0" encoding="utf-8"?>
 2 | <FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
 3 |     android:layout_width="match_parent"
 4 |     android:layout_height="?android:attr/listPreferredItemHeight"
 5 |     android:orientation="vertical">
 6 | 
 7 |     <LinearLayout
 8 |         android:layout_width="match_parent"
 9 |         android:layout_height="wrap_content">
10 | 
11 |         <TextView
12 |             android:id="@+id/todo_item_todo_title"
13 |             android:layout_width="120dp"
14 |             android:layout_height="wrap_content" />
15 | 
16 |         <TextView
17 |             android:id="@+id/todo_item_todo_content"
18 |             android:layout_width="wrap_content"
19 |             android:layout_height="wrap_content" />
20 | 
21 |     </LinearLayout>
22 | 
23 | 
24 | </FrameLayout>


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/app/src/androidTest/java/com/easy/kotlin/mytodoapplication/ExampleInstrumentedTest.java:
--------------------------------------------------------------------------------
 1 | package com.easy.kotlin.mytodoapplication;
 2 | 
 3 | import android.content.Context;
 4 | import android.support.test.InstrumentationRegistry;
 5 | import android.support.test.runner.AndroidJUnit4;
 6 | 
 7 | import org.junit.Test;
 8 | import org.junit.runner.RunWith;
 9 | 
10 | import static org.junit.Assert.*;
11 | 
12 | /**
13 |  * Instrumentation test, which will execute on an Android device.
14 |  *
15 |  * @see <a href="http://d.android.com/tools/testing">Testing documentation</a>
16 |  */
17 | @RunWith(AndroidJUnit4.class)
18 | public class ExampleInstrumentedTest {
19 |     @Test
20 |     public void useAppContext() throws Exception {
21 |         // Context of the app under test.
22 |         Context appContext = InstrumentationRegistry.getTargetContext();
23 | 
24 |         assertEquals("com.easy.kotlin.mytodoapplication", appContext.getPackageName());
25 |     }
26 | }
27 | 


--------------------------------------------------------------------------------
/app/src/main/AndroidManifest.xml:
--------------------------------------------------------------------------------
 1 | <?xml version="1.0" encoding="utf-8"?>
 2 | <manifest xmlns:android="http://schemas.android.com/apk/res/android"
 3 |     package="com.easy.kotlin.mytodoapplication">
 4 | 
 5 |     <application
 6 |         android:name=".MyTodoApplication"
 7 |         android:allowBackup="true"
 8 |         android:icon="@mipmap/ic_launcher"
 9 |         android:label="@string/app_name"
10 |         android:roundIcon="@mipmap/ic_launcher_round"
11 |         android:supportsRtl="true"
12 |         android:theme="@style/AppTheme">
13 |         <activity
14 |             android:name=".MainActivity"
15 |             android:label="@string/app_name"
16 |             android:theme="@style/AppTheme.NoActionBar">
17 |             <intent-filter>
18 |                 <action android:name="android.intent.action.MAIN" />
19 | 
20 |                 <category android:name="android.intent.category.LAUNCHER" />
21 |             </intent-filter>
22 |         </activity>
23 |     </application>
24 | 
25 | </manifest>
26 | 


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/app/src/main/res/layout/fragment_todos.xml:
--------------------------------------------------------------------------------
 1 | <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
 2 |     xmlns:app="http://schemas.android.com/apk/res-auto"
 3 |     xmlns:tools="http://schemas.android.com/tools"
 4 |     android:layout_width="match_parent"
 5 |     android:layout_height="match_parent"
 6 |     android:paddingBottom="@dimen/activity_vertical_margin"
 7 |     android:paddingLeft="@dimen/activity_horizontal_margin"
 8 |     android:paddingRight="@dimen/activity_horizontal_margin"
 9 |     android:paddingTop="@dimen/activity_vertical_margin"
10 |     tools:context=".TodosFragment"
11 |     tools:showIn="@layout/activity_main">
12 | 
13 |     <co.moonmonkeylabs.realmrecyclerview.RealmRecyclerView
14 |         android:id="@+id/todos_recycler_view"
15 |         android:layout_width="match_parent"
16 |         android:layout_height="match_parent"
17 |         app:rrvEmptyLayoutId="@layout/empty_view"
18 |         app:rrvIsRefreshable="false"
19 |         app:rrvLayoutType="LinearLayout" />
20 | 
21 | </RelativeLayout>
22 | 


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/app/proguard-rules.pro:
--------------------------------------------------------------------------------
 1 | # Add project specific ProGuard rules here.
 2 | # By default, the flags in this file are appended to flags specified
 3 | # in /Users/jack/Library/Android/sdk/tools/proguard/proguard-android.txt
 4 | # You can edit the include path and order by changing the proguardFiles
 5 | # directive in build.gradle.
 6 | #
 7 | # For more details, see
 8 | #   http://developer.android.com/guide/developing/tools/proguard.html
 9 | 
10 | # Add any project specific keep options here:
11 | 
12 | # If your project uses WebView with JS, uncomment the following
13 | # and specify the fully qualified class name to the JavaScript interface
14 | # class:
15 | #-keepclassmembers class fqcn.of.javascript.interface.for.webview {
16 | #   public *;
17 | #}
18 | 
19 | # Uncomment this to preserve the line number information for
20 | # debugging stack traces.
21 | #-keepattributes SourceFile,LineNumberTable
22 | 
23 | # If you keep the line number information, uncomment this to
24 | # hide the original source file name.
25 | #-renamesourcefileattribute SourceFile
26 | 


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/app/src/main/kotlin/com/easy/kotlin/mytodoapplication/MyTodoApplication.kt:
--------------------------------------------------------------------------------
 1 | package com.easy.kotlin.mytodoapplication
 2 | 
 3 | import android.app.Application
 4 | import io.realm.Realm
 5 | import io.realm.RealmConfiguration
 6 | 
 7 | /**
 8 |  * Created by jack on 2017/7/21.
 9 |  */
10 | class MyTodoApplication : Application() {
11 |     override fun onCreate() {
12 |         super.onCreate()
13 | 
14 |         val config = RealmConfiguration.Builder(this)
15 |                 .name("realm.my_todos")// 库文件名
16 |                 .encryptionKey(getKey())  // 加密
17 |                 .schemaVersion(1)  // 版本号
18 |                 .deleteRealmIfMigrationNeeded()
19 |                 .build()
20 | 
21 |         // 非持久化的、存在于内存中的 Realm 实例
22 |         //        RealmConfiguration myConfig = new RealmConfiguration.Builder()
23 |         //                .name("realm.my_todos")
24 |         //                .inMemory()
25 |         //                .build();
26 | 
27 |         Realm.setDefaultConfiguration(config)// 设置默认 RealmConfiguration
28 |         // 配合 Configuration 使用
29 |         // Realm.deleteRealm(config);  // 每次执行清除数据
30 |     }
31 | 
32 |     /**
33 |      * 64 bits
34 |      * @return
35 |      */
36 |     private fun getKey(): ByteArray {
37 |         return byteArrayOf(0, 1, 2, 3, 4, 3, 2, 1, 0, 1, 2, 3, 4, 3, 2, 1, 0, 1, 2, 3, 4, 3, 2, 1, 0, 1, 2, 3, 4, 3, 2, 1, 0, 1, 2, 3, 4, 3, 2, 1, 0, 1, 2, 3, 4, 3, 2, 1, 0, 1, 2, 3, 4, 3, 2, 1, 0, 1, 2, 3, 4, 3, 2, 1)
38 |     }
39 | }
40 | 


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/app/src/main/res/layout/activity_main.xml:
--------------------------------------------------------------------------------
 1 | <?xml version="1.0" encoding="utf-8"?>
 2 | <android.support.design.widget.CoordinatorLayout
 3 |     xmlns:android="http://schemas.android.com/apk/res/android"
 4 |     xmlns:app="http://schemas.android.com/apk/res-auto"
 5 |     xmlns:tools="http://schemas.android.com/tools"
 6 |     android:layout_width="match_parent"
 7 |     android:layout_height="match_parent"
 8 |     android:fitsSystemWindows="true"
 9 |     tools:context="com.easy.kotlin.mytodoapplication.MainActivity">
10 | 
11 |     <android.support.design.widget.AppBarLayout
12 |         android:layout_width="match_parent"
13 |         android:layout_height="wrap_content"
14 |         android:theme="@style/AppTheme.AppBarOverlay">
15 | 
16 |         <android.support.v7.widget.Toolbar
17 |             android:id="@+id/toolbar"
18 |             android:layout_width="match_parent"
19 |             android:layout_height="?attr/actionBarSize"
20 |             android:background="?attr/colorPrimaryDark"
21 |             app:popupTheme="@style/AppTheme.PopupOverlay" />
22 | 
23 |     </android.support.design.widget.AppBarLayout>
24 | 
25 |     <include layout="@layout/content_main" />
26 | 
27 |     <android.support.design.widget.FloatingActionButton
28 |         android:id="@+id/fab"
29 |         android:layout_width="wrap_content"
30 |         android:layout_height="wrap_content"
31 |         android:layout_gravity="bottom|end"
32 |         android:layout_margin="@dimen/fab_margin"
33 |         app:srcCompat="@drawable/ic_content_add" />
34 | 
35 | </android.support.design.widget.CoordinatorLayout>
36 | 


--------------------------------------------------------------------------------
/gradlew.bat:
--------------------------------------------------------------------------------
 1 | @if "%DEBUG%" == "" @echo off
 2 | @rem ##########################################################################
 3 | @rem
 4 | @rem  Gradle startup script for Windows
 5 | @rem
 6 | @rem ##########################################################################
 7 | 
 8 | @rem Set local scope for the variables with windows NT shell
 9 | if "%OS%"=="Windows_NT" setlocal
10 | 
11 | @rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
12 | set DEFAULT_JVM_OPTS=
13 | 
14 | set DIRNAME=%~dp0
15 | if "%DIRNAME%" == "" set DIRNAME=.
16 | set APP_BASE_NAME=%~n0
17 | set APP_HOME=%DIRNAME%
18 | 
19 | @rem Find java.exe
20 | if defined JAVA_HOME goto findJavaFromJavaHome
21 | 
22 | set JAVA_EXE=java.exe
23 | %JAVA_EXE% -version >NUL 2>&1
24 | if "%ERRORLEVEL%" == "0" goto init
25 | 
26 | echo.
27 | echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
28 | echo.
29 | echo Please set the JAVA_HOME variable in your environment to match the
30 | echo location of your Java installation.
31 | 
32 | goto fail
33 | 
34 | :findJavaFromJavaHome
35 | set JAVA_HOME=%JAVA_HOME:"=%
36 | set JAVA_EXE=%JAVA_HOME%/bin/java.exe
37 | 
38 | if exist "%JAVA_EXE%" goto init
39 | 
40 | echo.
41 | echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME%
42 | echo.
43 | echo Please set the JAVA_HOME variable in your environment to match the
44 | echo location of your Java installation.
45 | 
46 | goto fail
47 | 
48 | :init
49 | @rem Get command-line arguments, handling Windowz variants
50 | 
51 | if not "%OS%" == "Windows_NT" goto win9xME_args
52 | if "%@eval[2+2]" == "4" goto 4NT_args
53 | 
54 | :win9xME_args
55 | @rem Slurp the command line arguments.
56 | set CMD_LINE_ARGS=
57 | set _SKIP=2
58 | 
59 | :win9xME_args_slurp
60 | if "x%~1" == "x" goto execute
61 | 
62 | set CMD_LINE_ARGS=%*
63 | goto execute
64 | 
65 | :4NT_args
66 | @rem Get arguments from the 4NT Shell from JP Software
67 | set CMD_LINE_ARGS=%$
68 | 
69 | :execute
70 | @rem Setup the command line
71 | 
72 | set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar
73 | 
74 | @rem Execute Gradle
75 | "%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %CMD_LINE_ARGS%
76 | 
77 | :end
78 | @rem End local scope for the variables with windows NT shell
79 | if "%ERRORLEVEL%"=="0" goto mainEnd
80 | 
81 | :fail
82 | rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of
83 | rem the _cmd.exe /c_ return code!
84 | if  not "" == "%GRADLE_EXIT_CONSOLE%" exit 1
85 | exit /b 1
86 | 
87 | :mainEnd
88 | if "%OS%"=="Windows_NT" endlocal
89 | 
90 | :omega
91 | 


--------------------------------------------------------------------------------
/app/src/main/kotlin/com/easy/kotlin/mytodoapplication/TodoAdapter.kt:
--------------------------------------------------------------------------------
 1 | package com.easy.kotlin.mytodoapplication
 2 | 
 3 | //import butterknife.bindView
 4 | import android.content.Context
 5 | import android.graphics.Color
 6 | import android.view.View
 7 | import android.view.ViewGroup
 8 | import android.widget.TextView
 9 | import butterknife.BindView
10 | import butterknife.ButterKnife
11 | import com.easy.kotlin.mytodoapplication.model.Todo
12 | import io.realm.RealmBasedRecyclerViewAdapter
13 | import io.realm.RealmResults
14 | import io.realm.RealmViewHolder
15 | 
16 | 
17 | /**
18 |  * Created by jack on 2017/7/21.
19 |  */
20 | 
21 | class TodoAdapter(context: Context,
22 |                   realmResults: RealmResults<Todo>,
23 |                   automaticUpdate: Boolean,
24 |                   animateResults: Boolean,
25 |                   private val clickListener: TodoItemClickListener) :
26 | 
27 |         RealmBasedRecyclerViewAdapter<Todo, TodoAdapter.ViewHolder>(
28 |                 context,
29 |                 realmResults,
30 |                 automaticUpdate,
31 |                 animateResults) {
32 | 
33 |     override fun onCreateRealmViewHolder(viewGroup: ViewGroup, viewType: Int): ViewHolder {
34 |         val v = inflater.inflate(R.layout.todo_item, viewGroup, false)
35 |         return ViewHolder(v, clickListener)
36 |     }
37 | 
38 |     override fun onBindRealmViewHolder(viewHolder: ViewHolder, position: Int) {
39 |         val todo = realmResults[position]
40 | 
41 |         viewHolder.todoTitle.setText(todo.title)
42 |         viewHolder.todoTitle.fontFeatureSettings = "font-size:12px"
43 |         viewHolder.todoTitle.setTextColor(Color.argb(255, 69, 106, 124))
44 | 
45 |         viewHolder.todoContent.setText(todo.content)
46 |     }
47 | 
48 |     interface TodoItemClickListener {
49 |         fun onClick(caller: View, todo: Todo)
50 |     }
51 | 
52 |     inner class ViewHolder(view: View, private val clickListener: TodoItemClickListener?) :
53 |             RealmViewHolder(view), View.OnClickListener {
54 | 
55 |         // Bind a field to the view for the specified ID. The view will automatically be cast to the field type
56 |         @BindView(R.id.todo_item_todo_title)
57 |         lateinit var todoTitle: TextView
58 |         // val todoTitle: TextView by bindView(R.id.todo_item_todo_title)
59 |         @BindView(R.id.todo_item_todo_content)
60 |         lateinit var todoContent: TextView
61 |         // val todoContent: TextView by bindView(R.id.todo_item_todo_content)
62 | 
63 |         init {
64 |             // Bind annotated fields and methods
65 |             ButterKnife.bind(this, view)
66 |             view.setOnClickListener(this)
67 |         }
68 | 
69 |         override fun onClick(v: View) {
70 |             clickListener?.onClick(v, realmResults[adapterPosition])
71 |         }
72 |     }
73 | 
74 | 
75 | }
76 | 


--------------------------------------------------------------------------------
/app/src/main/kotlin/com/easy/kotlin/mytodoapplication/TodosFragment.kt:
--------------------------------------------------------------------------------
 1 | package com.easy.kotlin.mytodoapplication
 2 | 
 3 | import android.os.Bundle
 4 | import android.support.v4.app.Fragment
 5 | import android.util.Log
 6 | import android.view.LayoutInflater
 7 | import android.view.View
 8 | import android.view.ViewGroup
 9 | import butterknife.BindView
10 | import butterknife.ButterKnife
11 | import co.moonmonkeylabs.realmrecyclerview.RealmRecyclerView
12 | import com.easy.kotlin.mytodoapplication.TAG.MY_TAG
13 | import com.easy.kotlin.mytodoapplication.model.Todo
14 | import io.realm.Realm
15 | 
16 | /**
17 |  * Created by jack on 2017/7/22.
18 |  */
19 | 
20 | 
21 | class TodosFragment : Fragment(), TodoAdapter.TodoItemClickListener {
22 | 
23 |     // protected val realmRecyclerView: RealmRecyclerView by bindView(R.id.todos_recycler_view)
24 |     // var realmRecyclerView: RealmRecyclerView? = null // var 可变 View
25 |     @BindView(R.id.todos_recycler_view)
26 |     lateinit var realmRecyclerView: RealmRecyclerView
27 | 
28 |     private var realm: Realm? = null
29 | 
30 |     override fun onCreateView(inflater: LayoutInflater?,
31 |                               container: ViewGroup?,
32 |                               savedInstanceState: Bundle?): View? {
33 | 
34 |         val v = inflater!!.inflate(R.layout.fragment_todos, container, false)
35 |         ButterKnife.bind(this, v)
36 |         return v
37 |     }
38 | 
39 |     override fun onActivityCreated(savedInstanceState: Bundle?) {
40 |         super.onActivityCreated(savedInstanceState)
41 |         realm = Realm.getDefaultInstance()
42 |     }
43 | 
44 |     override fun onResume() {
45 |         super.onResume()
46 |         val todos = realm!!.where(Todo::class.java).findAll()
47 |         Log.i(MY_TAG, "onResume: ${todos}")
48 |         //realmRecyclerView = find(R.id.todos_recycler_view) // 可变 View
49 |         Log.i(MY_TAG, "onResume: realmRecyclerView = ${realmRecyclerView} ")
50 |         val adapter = TodoAdapter(activity, todos, true, true, this)
51 |         realmRecyclerView.setAdapter(adapter)
52 |     }
53 | 
54 |     override fun onDestroy() {
55 |         super.onDestroy()
56 |         realm!!.close()
57 |     }
58 | 
59 |     // 点击事项，跳转编辑 EditFragment
60 |     override fun onClick(caller: View, todo: Todo) {
61 |         (activity as MainActivity).hideFab()
62 | 
63 |         val todoEditFragment = TodoEditFragment.newInstance(todo.id)
64 |         activity.supportFragmentManager
65 |                 .beginTransaction()
66 |                 .replace(R.id.content_main, todoEditFragment, todoEditFragment.javaClass.getSimpleName())
67 |                 .addToBackStack(todoEditFragment.javaClass.getSimpleName())
68 |                 .commit()
69 |     }
70 | 
71 |     companion object {
72 |         fun newInstance(): TodosFragment {
73 |             return TodosFragment()
74 |         }
75 |     }
76 | }
77 | 


--------------------------------------------------------------------------------
/app/build.gradle:
--------------------------------------------------------------------------------
 1 | apply plugin: 'com.android.application'
 2 | apply plugin: 'kotlin-android'
 3 | apply plugin: 'kotlin-kapt'
 4 | 
 5 | android {
 6 |     compileSdkVersion 25
 7 |     buildToolsVersion "25.0.3"
 8 | 
 9 |     defaultConfig {
10 |         applicationId "com.easy.kotlin.mytodoapplication"
11 |         minSdkVersion 21
12 |         targetSdkVersion 25
13 |         versionCode 1
14 |         versionName "1.0"
15 |         testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
16 |     }
17 | 
18 |     buildTypes {
19 |         release {
20 |             minifyEnabled false
21 |             proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
22 |         }
23 |     }
24 | 
25 |     sourceSets {
26 |         // += 添加Java的编译路径, 在main中创建kotlin文件夹, 用于存放kotlin代码
27 |         main.java.srcDirs += 'src/main/kotlin'
28 |     }
29 | }
30 | 
31 | //构建脚本
32 | buildscript {
33 |     ext.kotlin_version = '1.1.3'
34 |     repositories {
35 |         mavenCentral()
36 |     }
37 |     dependencies {
38 |         classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
39 |     }
40 | }
41 | 
42 | repositories {
43 |     mavenCentral()
44 |     maven { url "https://jitpack.io" }
45 |     maven { url 'https://oss.sonatype.org/content/repositories/snapshots/' }
46 | }
47 | 
48 | dependencies {
49 |     compile fileTree(dir: 'libs', include: ['*.jar'])
50 |     androidTestCompile('com.android.support.test.espresso:espresso-core:2.2.2', {
51 |         exclude group: 'com.android.support', module: 'support-annotations'
52 |     })
53 |     compile 'com.android.support:appcompat-v7:25.3.1'
54 |     compile 'com.android.support.constraint:constraint-layout:1.0.2'
55 |     compile 'com.android.support:design:25.3.1'
56 |     testCompile 'junit:junit:4.12'
57 | 
58 |     // Kotlin
59 |     compile "org.jetbrains.kotlin:kotlin-stdlib:$kotlin_version"
60 | 
61 |     // Anko
62 |     compile 'org.jetbrains.anko:anko-sdk15:0.8.2' // sdk19, sdk21, sdk23 are also available
63 |     compile 'org.jetbrains.anko:anko-support-v4:0.8.2' // In case you need support-v4 bindings
64 |     compile 'org.jetbrains.anko:anko-appcompat-v7:0.8.2' // For appcompat-v7 bindings
65 | 
66 |     // realm：跨平台移动数据库引擎
67 |     compile 'io.realm:realm-android:0.87.1'
68 |     // kotlin使用realm的注解处理依赖库
69 |     kapt "io.realm:realm-annotations:0.87.1"
70 |     kapt "io.realm:realm-annotations-processor:0.87.1"
71 | 
72 |     compile 'com.github.thorbenprimke:realm-recyclerview:0.9.12' // 在jitpack.io上
73 | 
74 |     // Butter Knife，专门为Android View设计的绑定注解，专业解决各种findViewById
75 | //    compile 'com.jakewharton:butterknife:7.0.1'
76 | //    compile 'com.jakewharton:kotterknife:0.1.0-SNAPSHOT'
77 |     compile 'com.jakewharton:butterknife:8.7.0'
78 |     annotationProcessor 'com.jakewharton:butterknife-compiler:8.7.0'
79 |     kapt 'com.jakewharton:butterknife-compiler:8.7.0'
80 |     compile 'com.android.support:support-v4:25.3.1'
81 | 
82 | }
83 | 


--------------------------------------------------------------------------------
/app/src/main/kotlin/com/easy/kotlin/mytodoapplication/MainActivity.kt:
--------------------------------------------------------------------------------
 1 | package com.easy.kotlin.mytodoapplication
 2 | 
 3 | import android.os.Bundle
 4 | import android.support.design.widget.FloatingActionButton
 5 | import android.support.v7.app.AppCompatActivity
 6 | import android.support.v7.widget.Toolbar
 7 | import android.view.Menu
 8 | import android.view.MenuItem
 9 | import android.view.View
10 | 
11 | //import butterknife.bindView
12 | 
13 | class MainActivity : AppCompatActivity() {
14 | 
15 |     //    val fab: FloatingActionButton by bindView(R.id.fab)
16 |     var fab: FloatingActionButton? = null
17 | 
18 |     override fun onCreate(savedInstanceState: Bundle?) {
19 |         super.onCreate(savedInstanceState)
20 |         setContentView(R.layout.activity_main)
21 | 
22 |         val toolbar = findViewById(R.id.toolbar) as Toolbar
23 |         setSupportActionBar(toolbar)
24 | 
25 |         fab = findViewById(R.id.fab) as FloatingActionButton
26 | 
27 | 
28 |         // 添加日程事件
29 |         fab?.setOnClickListener { _ ->
30 |             // Snackbar.make(view, "Replace with your own action", Snackbar.LENGTH_LONG).setAction("Action", null).show()
31 |             val todoEditFragment = TodoEditFragment()
32 |             getSupportFragmentManager()
33 |                     .beginTransaction()
34 |                     .replace(R.id.content_main, todoEditFragment, todoEditFragment.javaClass.getSimpleName())
35 |                     .addToBackStack(todoEditFragment.javaClass.getSimpleName())
36 |                     .commit()
37 | 
38 |             hideFab()
39 |         }
40 | 
41 |         // 待办事项 List
42 |         val fragment = TodosFragment.newInstance()
43 | 
44 |         supportFragmentManager.beginTransaction()
45 |                 .replace(R.id.content_main, fragment, fragment::class.java.getSimpleName())
46 |                 .commit()
47 | 
48 |         supportFragmentManager.addOnBackStackChangedListener {
49 |             val backStackCount = supportFragmentManager.backStackEntryCount
50 |             if (backStackCount == 0) {
51 |                 showFab()
52 |             }
53 |         }
54 |     }
55 | 
56 |     override fun onCreateOptionsMenu(menu: Menu): Boolean {
57 |         // Inflate the menu; this adds items to the action bar if it is present.
58 |         menuInflater.inflate(R.menu.menu_main, menu)
59 |         return true
60 |     }
61 | 
62 |     override fun onOptionsItemSelected(item: MenuItem): Boolean {
63 |         // Handle actio1n bar item clicks here. The action bar will
64 |         // automatically handle clicks on the Home/Up button, so long
65 |         // as you specify a parent activity in AndroidManifest.xml.
66 |         val id = item.itemId
67 |         if (id == R.id.action_settings) {
68 |             return true
69 |         }
70 | 
71 |         return super.onOptionsItemSelected(item)
72 |     }
73 | 
74 |     fun hideFab() {
75 |         fab?.visibility = View.GONE
76 |     }
77 | 
78 |     fun showFab() {
79 |         fab?.visibility = View.VISIBLE
80 |     }
81 | 
82 | }
83 | 


--------------------------------------------------------------------------------
/app/src/main/kotlin/com/easy/kotlin/mytodoapplication/TodoEditFragment.kt:
--------------------------------------------------------------------------------
  1 | package com.easy.kotlin.mytodoapplication
  2 | 
  3 | import android.graphics.Color
  4 | import android.os.Bundle
  5 | import android.support.v4.app.Fragment
  6 | import android.view.LayoutInflater
  7 | import android.view.View
  8 | import android.view.ViewGroup
  9 | import android.widget.Button
 10 | import android.widget.EditText
 11 | import com.easy.kotlin.mytodoapplication.model.Todo
 12 | import io.realm.Realm
 13 | import org.jetbrains.anko.*
 14 | import org.jetbrains.anko.support.v4.UI
 15 | import org.jetbrains.anko.support.v4.find
 16 | import java.util.*
 17 | 
 18 | 
 19 | class TodoEditFragment : Fragment() {
 20 |     val realm: Realm = Realm.getDefaultInstance()
 21 |     var todo: Todo? = null
 22 | 
 23 |     companion object {
 24 |         val TODO_ID_KEY: String = "todo_id_key"
 25 | 
 26 |         fun newInstance(id: String): TodoEditFragment {
 27 |             var args: Bundle = Bundle()
 28 |             args.putString(TODO_ID_KEY, id)
 29 |             var todoEditFragment: TodoEditFragment = newInstance()
 30 |             todoEditFragment.arguments = args
 31 |             return todoEditFragment
 32 |         }
 33 | 
 34 |         fun newInstance(): TodoEditFragment {
 35 |             return TodoEditFragment()
 36 |         }
 37 |     }
 38 | 
 39 |     override fun onCreateView(inflater: LayoutInflater?, container: ViewGroup?, savedInstanceState: Bundle?): View? {
 40 |         return UI {
 41 |             // AnkoContext
 42 | 
 43 |             verticalLayout {
 44 |                 padding = dip(30)
 45 |                 var title = editText {
 46 |                     // editText 视图
 47 |                     id = R.id.todo_title
 48 |                     hintResource = R.string.title_hint
 49 |                 }
 50 | 
 51 |                 var content = editText {
 52 |                     id = R.id.todo_content
 53 |                     height = 400
 54 |                     hintResource = R.string.content_hint
 55 |                 }
 56 |                 button {
 57 |                     // button 视图
 58 |                     id = R.id.todo_add
 59 |                     textResource = R.string.add_todo
 60 |                     textColor = Color.WHITE
 61 |                     setBackgroundColor(Color.DKGRAY)
 62 |                     onClick { _ -> createTodoFrom(title, content) }
 63 |                 }
 64 |             }
 65 |         }.view
 66 |     }
 67 | 
 68 |     override fun onActivityCreated(savedInstanceState: Bundle?) {
 69 |         super.onActivityCreated(savedInstanceState)
 70 | 
 71 |         if (arguments != null && arguments.containsKey(TODO_ID_KEY)) {
 72 | 
 73 |             val todoId = arguments.getString(TODO_ID_KEY)
 74 |             todo = realm.where(Todo::class.java).equalTo("id", todoId).findFirst()
 75 | 
 76 |             val todoTitle = find<EditText>(R.id.todo_title)
 77 |             todoTitle.setText(todo?.title)
 78 | 
 79 |             val todoContent = find<EditText>(R.id.todo_content)
 80 |             todoContent.setText(todo?.content)
 81 | 
 82 |             val add = find<Button>(R.id.todo_add)
 83 |             add.setText(R.string.save)
 84 |         }
 85 |     }
 86 | 
 87 |     override fun onDestroy() {
 88 |         super.onDestroy()
 89 |         realm.close()
 90 |     }
 91 | 
 92 | 
 93 |     /**
 94 |      *  新增待办事项，存入Realm数据库
 95 |      *
 96 |      *  @param title the title edit text.
 97 |      *  @param todoContent the content edit text.
 98 |      */
 99 |     private fun createTodoFrom(title: EditText, todoContent: EditText) {
100 | 
101 |         realm.beginTransaction()
102 |         // Either update the edited object or create a new one.
103 |         var t = todo ?: realm.createObject(Todo::class.java)
104 |         t.id = todo?.id ?: UUID.randomUUID().toString()
105 |         t.title = title.text.toString()
106 |         t.content = todoContent.text.toString()
107 | 
108 |         realm.commitTransaction()
109 | 
110 |         activity.supportFragmentManager.popBackStack()
111 |         // 返回 MainActivity
112 | //        val intent = Intent()
113 | //        intent.setClass(activity, MainActivity::class.java)
114 | //        activity.startActivity(intent)
115 |     }
116 | 
117 | 
118 | }
119 | 


--------------------------------------------------------------------------------
/gradlew:
--------------------------------------------------------------------------------
  1 | #!/usr/bin/env bash
  2 | 
  3 | ##############################################################################
  4 | ##
  5 | ##  Gradle start up script for UN*X
  6 | ##
  7 | ##############################################################################
  8 | 
  9 | # Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
 10 | DEFAULT_JVM_OPTS=""
 11 | 
 12 | APP_NAME="Gradle"
 13 | APP_BASE_NAME=`basename "$0"`
 14 | 
 15 | # Use the maximum available, or set MAX_FD != -1 to use that value.
 16 | MAX_FD="maximum"
 17 | 
 18 | warn ( ) {
 19 |     echo "$*"
 20 | }
 21 | 
 22 | die ( ) {
 23 |     echo
 24 |     echo "$*"
 25 |     echo
 26 |     exit 1
 27 | }
 28 | 
 29 | # OS specific support (must be 'true' or 'false').
 30 | cygwin=false
 31 | msys=false
 32 | darwin=false
 33 | case "`uname`" in
 34 |   CYGWIN* )
 35 |     cygwin=true
 36 |     ;;
 37 |   Darwin* )
 38 |     darwin=true
 39 |     ;;
 40 |   MINGW* )
 41 |     msys=true
 42 |     ;;
 43 | esac
 44 | 
 45 | # Attempt to set APP_HOME
 46 | # Resolve links: $0 may be a link
 47 | PRG="$0"
 48 | # Need this for relative symlinks.
 49 | while [ -h "$PRG" ] ; do
 50 |     ls=`ls -ld "$PRG"`
 51 |     link=`expr "$ls" : '.*-> \(.*\)$'`
 52 |     if expr "$link" : '/.*' > /dev/null; then
 53 |         PRG="$link"
 54 |     else
 55 |         PRG=`dirname "$PRG"`"/$link"
 56 |     fi
 57 | done
 58 | SAVED="`pwd`"
 59 | cd "`dirname \"$PRG\"`/" >/dev/null
 60 | APP_HOME="`pwd -P`"
 61 | cd "$SAVED" >/dev/null
 62 | 
 63 | CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar
 64 | 
 65 | # Determine the Java command to use to start the JVM.
 66 | if [ -n "$JAVA_HOME" ] ; then
 67 |     if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
 68 |         # IBM's JDK on AIX uses strange locations for the executables
 69 |         JAVACMD="$JAVA_HOME/jre/sh/java"
 70 |     else
 71 |         JAVACMD="$JAVA_HOME/bin/java"
 72 |     fi
 73 |     if [ ! -x "$JAVACMD" ] ; then
 74 |         die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME
 75 | 
 76 | Please set the JAVA_HOME variable in your environment to match the
 77 | location of your Java installation."
 78 |     fi
 79 | else
 80 |     JAVACMD="java"
 81 |     which java >/dev/null 2>&1 || die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
 82 | 
 83 | Please set the JAVA_HOME variable in your environment to match the
 84 | location of your Java installation."
 85 | fi
 86 | 
 87 | # Increase the maximum file descriptors if we can.
 88 | if [ "$cygwin" = "false" -a "$darwin" = "false" ] ; then
 89 |     MAX_FD_LIMIT=`ulimit -H -n`
 90 |     if [ $? -eq 0 ] ; then
 91 |         if [ "$MAX_FD" = "maximum" -o "$MAX_FD" = "max" ] ; then
 92 |             MAX_FD="$MAX_FD_LIMIT"
 93 |         fi
 94 |         ulimit -n $MAX_FD
 95 |         if [ $? -ne 0 ] ; then
 96 |             warn "Could not set maximum file descriptor limit: $MAX_FD"
 97 |         fi
 98 |     else
 99 |         warn "Could not query maximum file descriptor limit: $MAX_FD_LIMIT"
100 |     fi
101 | fi
102 | 
103 | # For Darwin, add options to specify how the application appears in the dock
104 | if $darwin; then
105 |     GRADLE_OPTS="$GRADLE_OPTS \"-Xdock:name=$APP_NAME\" \"-Xdock:icon=$APP_HOME/media/gradle.icns\""
106 | fi
107 | 
108 | # For Cygwin, switch paths to Windows format before running java
109 | if $cygwin ; then
110 |     APP_HOME=`cygpath --path --mixed "$APP_HOME"`
111 |     CLASSPATH=`cygpath --path --mixed "$CLASSPATH"`
112 |     JAVACMD=`cygpath --unix "$JAVACMD"`
113 | 
114 |     # We build the pattern for arguments to be converted via cygpath
115 |     ROOTDIRSRAW=`find -L / -maxdepth 1 -mindepth 1 -type d 2>/dev/null`
116 |     SEP=""
117 |     for dir in $ROOTDIRSRAW ; do
118 |         ROOTDIRS="$ROOTDIRS$SEP$dir"
119 |         SEP="|"
120 |     done
121 |     OURCYGPATTERN="(^($ROOTDIRS))"
122 |     # Add a user-defined pattern to the cygpath arguments
123 |     if [ "$GRADLE_CYGPATTERN" != "" ] ; then
124 |         OURCYGPATTERN="$OURCYGPATTERN|($GRADLE_CYGPATTERN)"
125 |     fi
126 |     # Now convert the arguments - kludge to limit ourselves to /bin/sh
127 |     i=0
128 |     for arg in "$@" ; do
129 |         CHECK=`echo "$arg"|egrep -c "$OURCYGPATTERN" -`
130 |         CHECK2=`echo "$arg"|egrep -c "^-"`                                 ### Determine if an option
131 | 
132 |         if [ $CHECK -ne 0 ] && [ $CHECK2 -eq 0 ] ; then                    ### Added a condition
133 |             eval `echo args$i`=`cygpath --path --ignore --mixed "$arg"`
134 |         else
135 |             eval `echo args$i`="\"$arg\""
136 |         fi
137 |         i=$((i+1))
138 |     done
139 |     case $i in
140 |         (0) set -- ;;
141 |         (1) set -- "$args0" ;;
142 |         (2) set -- "$args0" "$args1" ;;
143 |         (3) set -- "$args0" "$args1" "$args2" ;;
144 |         (4) set -- "$args0" "$args1" "$args2" "$args3" ;;
145 |         (5) set -- "$args0" "$args1" "$args2" "$args3" "$args4" ;;
146 |         (6) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" ;;
147 |         (7) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" ;;
148 |         (8) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" ;;
149 |         (9) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" "$args8" ;;
150 |     esac
151 | fi
152 | 
153 | # Split up the JVM_OPTS And GRADLE_OPTS values into an array, following the shell quoting and substitution rules
154 | function splitJvmOpts() {
155 |     JVM_OPTS=("$@")
156 | }
157 | eval splitJvmOpts $DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS
158 | JVM_OPTS[${#JVM_OPTS[*]}]="-Dorg.gradle.appname=$APP_BASE_NAME"
159 | 
160 | exec "$JAVACMD" "${JVM_OPTS[@]}" -classpath "$CLASSPATH" org.gradle.wrapper.GradleWrapperMain "$@"
161 | 


--------------------------------------------------------------------------------
/README.md:
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   1 | 第13章 使用 Kotlin 和 Anko 的Android 开发
   2 | ===
   3 | 
   4 | 
   5 | ## 13.1 什么是 Anko？
   6 | 
   7 | Anko (https://github.com/Kotlin/anko)  是一个用 Kotlin 写的Android DSL (Domain-Specific Language)。长久以来，Android视图都是用 XML 来完成布局的。这些 XML可重用性比较差。同时在运行的时候，XML 要转换成 Java 表述，这在一定程度上占用了 CPU 和耗费了电量。
   8 | 
   9 | Anko是一个 Kotlin 库, 它使 android 应用程序的开发变得更快、更容易。它使您的代码干净, 易于阅读, 并让您忘记了粗糙的边缘 android sdk 为 java。
  10 | 
  11 | Anko由几个部分组成:
  12 | 
  13 | |模块|         功能说明|
  14 | |---|---|
  15 | |Anko Commons|  使得对 intents, dialogs, logging等操作更加简单的轻量级库|
  16 | |Anko Layouts| 快速和类型安全的动态的 android 布局库|
  17 | |Anko SQLite| 用于 android sqlite 的查询 dsl 和分析库|
  18 | |Anko Coroutines|  基于 kotlinx 协程库|
  19 | 
  20 | 有了Anko 我们就能直接用 Kotlin 在任何的 Activity 、 Fragment 或者 AnkoComponent里来编写视图。
  21 | 
  22 | ## 13.2 一个简单Anko视图
  23 | 
  24 | 这里是一个转换成 Anko 的简单 XML 文件。
  25 | 
  26 | XML
  27 | ```
  28 | <LinearLayout
  29 |     xmlns:android="http://schemas.android.com/apk/res/android"
  30 |     android:layout_height="match_parent"
  31 |     android:layout_width="match_parent">
  32 |     <EditText
  33 |         android:id="@+id/todo_title"
  34 |         android:layout_width="match_parent"
  35 |         android:layout_heigh="wrap_content"
  36 |         android:hint="@string/title_hint" />
  37 |     <Button
  38 |         android:layout_width="match_parent"
  39 |         android:layout_height="wrap_content"
  40 |         android:text="@string/add_todo" />
  41 | </LinearLayout>
  42 | ```
  43 | 
  44 | 用 Anko 描述的同样的视图
  45 | 
  46 | ```
  47 | verticalLayout {
  48 |     var title = editText {
  49 |         id = R.id.todo_title
  50 |         hintResource = R.string.title_hint
  51 |     }
  52 |     button {
  53 |         textResource = R.string.add_todo
  54 |         onClick { view -> {
  55 |                 // 可以在这里添加一些处理逻辑
  56 |                 title.text = "Foo"
  57 |             }
  58 |         }
  59 |     }
  60 | }
  61 | ```
  62 | 
  63 | 可以看到在button布局中的onClick监听函数中，因为我们是使用 Kotlin代码来设计视图，所以可以直接使用title变量（editText视图对象）。
  64 | 
  65 | ## 13.3 快速入门实例
  66 | 
  67 | 下面我们通过一个“我的日程”待办事项应用，来详细介绍使用 Kotlin 混合 Java，使用 Anko 开发的Android 应用的方法。移动端数据库引擎我们使用 Realm，视图绑定使用Butter Knife。
  68 | 
  69 | 这个应用程序界面如下所示：
  70 | 
  71 | 
  72 | ![Screenshot_1500661334.png](http://upload-images.jianshu.io/upload_images/1233356-cba3711fbfd95c9d.png?imageMogr2/auto-orient/strip%7CimageView2/2/w/1240)
  73 | 
  74 | ![Screenshot_1500661325.png](http://upload-images.jianshu.io/upload_images/1233356-d7afc8397b6be9c3.png?imageMogr2/auto-orient/strip%7CimageView2/2/w/1240)
  75 | 
  76 | ![Screenshot_1500661320.png](http://upload-images.jianshu.io/upload_images/1233356-d912560d42ac69c5.png?imageMogr2/auto-orient/strip%7CimageView2/2/w/1240)
  77 | 
  78 | 
  79 | 
  80 | 
  81 | ## 13.4 使用 Android Studio 新建工程
  82 | 
  83 | 我们首先在 Android Studio 中新建工程，步骤如下：
  84 | 
  85 | 第一步，新建项目
  86 | 
  87 | ![螢幕快照 2017-07-21 00.03.49.png](http://upload-images.jianshu.io/upload_images/1233356-4e3643c7cd6cfee9.png?imageMogr2/auto-orient/strip%7CimageView2/2/w/1240)
  88 | 
  89 | 第二步，配置项目基本信息
  90 | 
  91 | ![螢幕快照 2017-07-20 23.38.01.png](http://upload-images.jianshu.io/upload_images/1233356-0afbd5f256c422e6.png?imageMogr2/auto-orient/strip%7CimageView2/2/w/1240)
  92 | 
  93 | 第三步，设置支持设备以及 SDK 版本
  94 | 
  95 | ![螢幕快照 2017-07-20 23.38.13.png](http://upload-images.jianshu.io/upload_images/1233356-886c980af1df31f4.png?imageMogr2/auto-orient/strip%7CimageView2/2/w/1240)
  96 | 
  97 | 第四步，选择 Basic Activity
  98 | 
  99 | ![螢幕快照 2017-07-20 23.38.29.png](http://upload-images.jianshu.io/upload_images/1233356-c7de31f6b8b44556.png?imageMogr2/auto-orient/strip%7CimageView2/2/w/1240)
 100 | 
 101 | 
 102 | 第五步，使用默认的Activity命名
 103 | 
 104 | ![螢幕快照 2017-07-20 23.39.04.png](http://upload-images.jianshu.io/upload_images/1233356-39592f366c8e4a5e.png?imageMogr2/auto-orient/strip%7CimageView2/2/w/1240)
 105 | 
 106 | 
 107 | 我们将得到一个标准的 Gradle Android 工程：
 108 | 
 109 | 
 110 | ![螢幕快照 2017-07-21 00.08.01.png](http://upload-images.jianshu.io/upload_images/1233356-a2ed24522aecd3b2.png?imageMogr2/auto-orient/strip%7CimageView2/2/w/1240)
 111 | 
 112 | 
 113 | 其中，app 工程 src 目录如下：
 114 | 
 115 | ```
 116 | .
 117 | ├── androidTest
 118 | │   └── java
 119 | │       └── com
 120 | │           └── easy
 121 | │               └── kotlin
 122 | │                   └── mytodoapplication
 123 | │                       └── ExampleInstrumentedTest.java
 124 | ├── main
 125 | │   ├── AndroidManifest.xml
 126 | │   ├── java
 127 | │   │   └── com
 128 | │   │       └── easy
 129 | │   │           └── kotlin
 130 | │   │               └── mytodoapplication
 131 | │   │                   └── MainActivity.java
 132 | │   └── res
 133 | │       ├── drawable
 134 | │       ├── layout
 135 | │       │   ├── activity_main.xml
 136 | │       │   └── content_main.xml
 137 | │       ├── menu
 138 | │       │   └── menu_main.xml
 139 | │       ├── mipmap-hdpi
 140 | │       │   ├── ic_launcher.png
 141 | │       │   └── ic_launcher_round.png
 142 | │       ├── mipmap-mdpi
 143 | │       │   ├── ic_launcher.png
 144 | │       │   └── ic_launcher_round.png
 145 | │       ├── mipmap-xhdpi
 146 | │       │   ├── ic_launcher.png
 147 | │       │   └── ic_launcher_round.png
 148 | │       ├── mipmap-xxhdpi
 149 | │       │   ├── ic_launcher.png
 150 | │       │   └── ic_launcher_round.png
 151 | │       ├── mipmap-xxxhdpi
 152 | │       │   ├── ic_launcher.png
 153 | │       │   └── ic_launcher_round.png
 154 | │       └── values
 155 | │           ├── colors.xml
 156 | │           ├── dimens.xml
 157 | │           ├── strings.xml
 158 | │           └── styles.xml
 159 | └── test
 160 |     └── java
 161 |         └── com
 162 |             └── easy
 163 |                 └── kotlin
 164 |                     └── mytodoapplication
 165 |                         └── ExampleUnitTest.java
 166 | 
 167 | 28 directories, 21 files
 168 | 
 169 | ```
 170 | 
 171 | 我们直接在Android 模拟器中（也可以选择用真机）运行它，可以看到如下效果：
 172 | 
 173 | 
 174 | ![Screenshot_1500567437.png](http://upload-images.jianshu.io/upload_images/1233356-fd623bdd8a8402dc.png?imageMogr2/auto-orient/strip%7CimageView2/2/w/1240)
 175 | 
 176 | 
 177 | ## 13.5 设计UI 界面主题颜色
 178 | 
 179 | 
 180 | 我们首先把应用名称改成“我的日程”。在文件MyTodoApplication/app/src/main/res/values/strings.xml中：
 181 | 
 182 | ```
 183 | <resources>
 184 |     <string name="app_name">MyTodoApplication</string>
 185 |     <string name="action_settings">Settings</string>
 186 | </resources>
 187 | 
 188 | ```
 189 | 
 190 | 改写成
 191 | 
 192 | ```
 193 | <resources>
 194 |     <string name="app_name">我的日程</string>
 195 |     <string name="action_settings">设置</string>
 196 | </resources>
 197 | 
 198 | ```
 199 | 
 200 | 
 201 | 再去colors.xml中，设计主题颜色为：
 202 | ```
 203 | <?xml version="1.0" encoding="utf-8"?>
 204 | <resources>
 205 |     <color name="colorPrimary">#f2fced</color>
 206 |     <color name="colorPrimaryDark">#456a7c</color>
 207 |     <color name="colorAccent">#8fb3c4</color>
 208 | </resources>
 209 | 
 210 | ```
 211 | 
 212 | 
 213 | 然后到文件MyTodoApplication/app/src/main/res/layout/activity_main.xml中，设置android.support.v7.widget.Toolbar的背景色为
 214 | ```
 215 | android:background="?attr/colorPrimaryDark"
 216 | ```
 217 | 
 218 | 配置android.support.design.widget.FloatingActionButton的图标为：
 219 | ```
 220 | app:srcCompat="drawable/ic_content_add"
 221 | ```
 222 | 
 223 | 其中，ic_content_add.png图片是我们添加按钮中间的加号 icon。
 224 | 
 225 | 
 226 | ## 13.6 配置 Kotlin 与 Anko 依赖
 227 | 
 228 | 我们默认生成的 app 项目的 Gradle 配置文件build.gradle如下：
 229 | ```
 230 | apply plugin: 'com.android.application'
 231 | 
 232 | android {
 233 |     compileSdkVersion 25
 234 |     buildToolsVersion "25.0.3"
 235 |     defaultConfig {
 236 |         applicationId "com.easy.kotlin.mytodoapplication"
 237 |         minSdkVersion 21
 238 |         targetSdkVersion 25
 239 |         versionCode 1
 240 |         versionName "1.0"
 241 |         testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
 242 |     }
 243 |     buildTypes {
 244 |         release {
 245 |             minifyEnabled false
 246 |             proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
 247 |         }
 248 |     }
 249 | }
 250 | 
 251 | dependencies {
 252 |     compile fileTree(dir: 'libs', include: ['*.jar'])
 253 |     androidTestCompile('com.android.support.test.espresso:espresso-core:2.2.2', {
 254 |         exclude group: 'com.android.support', module: 'support-annotations'
 255 |     })
 256 |     compile 'com.android.support:appcompat-v7:25.3.1'
 257 |     compile 'com.android.support.constraint:constraint-layout:1.0.2'
 258 |     compile 'com.android.support:design:25.3.1'
 259 |     testCompile 'junit:junit:4.12'
 260 | }
 261 | 
 262 | ```
 263 | 
 264 | 下面我们在 app 项目的build.gradle里面加上Kotlin 、Anko 、Realm、Butter Knife 等依赖。
 265 | 
 266 | ### 13.6.1 Kotlin依赖
 267 | 
 268 | 首先，启用插件`kotlin-android` :
 269 | ```
 270 | apply plugin: 'kotlin-android'
 271 | ```
 272 | 然后，添加构建脚本
 273 | ```
 274 | buildscript {
 275 | 
 276 | }
 277 | ```
 278 | 我们使用 Kotlin 1.1.3版本。在构建脚本中添加kotlin-gradle-plugin依赖，使用 Kotlin 对应的版本号。
 279 | ```
 280 | buildscript {
 281 |     ext.kotlin_version = '1.1.3'
 282 |     repositories {
 283 |         mavenCentral()
 284 |     }
 285 |     dependencies {
 286 |         classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
 287 |     }
 288 | }
 289 | ```
 290 | 在项目依赖里添加 Kotlin 标准库：
 291 | ```
 292 | // Kotlin
 293 | compile "org.jetbrains.kotlin:kotlin-stdlib:$kotlin_version"
 294 | ```
 295 | 
 296 | 
 297 | ### 13.6.2 添加 Kotlin 源代码目录
 298 | 
 299 | 首先，我们在 src/main/下面新建一个 kotlin 目录，来存放 Kotlin源码。然后在 build.gradle 文件里的 `android {}` 配置里面添加Java的编译路径：
 300 | 
 301 | ```
 302 | android {
 303 |     ...
 304 |     sourceSets {
 305 |         // += , 在main中创建kotlin文件夹, 用于存放kotlin代码
 306 |         main.java.srcDirs += 'src/main/kotlin'
 307 |     }
 308 | }
 309 | ```
 310 | 
 311 | 刚添加完毕，src/main/kotlin 还没有变成源码目录的蓝色，这个时候点击下图右上角的 Sync Now :
 312 | 
 313 | 
 314 | ![螢幕快照 2017-07-21 15.27.57.png](http://upload-images.jianshu.io/upload_images/1233356-32539498ceffa7cd.png?imageMogr2/auto-orient/strip%7CimageView2/2/w/1240)
 315 | 
 316 | Gradle 同步完毕，即可看到kotlin 目录已经变成蓝色的源码目录了：
 317 | 
 318 | 
 319 | ![螢幕快照 2017-07-21 16.01.41.png](http://upload-images.jianshu.io/upload_images/1233356-b128b7270abbf0fd.png?imageMogr2/auto-orient/strip%7CimageView2/2/w/1240)
 320 | 
 321 | 
 322 | 
 323 | 
 324 | 
 325 | 
 326 | ### 13.6.3 Anko依赖
 327 | 
 328 | 在项目依赖里添加
 329 | ```
 330 |     // Anko
 331 |     compile 'org.jetbrains.anko:anko-sdk15:0.8.2' // sdk19, sdk21, sdk23 are also available
 332 |     compile 'org.jetbrains.anko:anko-support-v4:0.8.2' // In case you need support-v4 bindings
 333 |     compile 'org.jetbrains.anko:anko-appcompat-v7:0.8.2' // For appcompat-v7 bindings
 334 | 
 335 | ```
 336 | 
 337 | ### 13.6.4 Realm依赖
 338 | 
 339 | ```
 340 |     compile 'io.realm:realm-android:0.87.1'
 341 |     compile 'com.github.thorbenprimke:realm-recyclerview:0.9.12' // 在jitpack.io上
 342 | ```
 343 | 
 344 | 其中，Realm是一个轻量级的跨平台移动数据库引。Realm 简单易用，model 设计在代码中，更加易于维护，同时其性能也不错。在Android开发中，它可以替代 SQLite 和 ORM 框架。相比SQLite，Realm更快并且具有很多现代数据库的特性，比如支持JSON，流式api，数据变更通知，以及加密支持。
 345 | 
 346 | RecyclerView用于在有限的窗口展现大量的数据，相比ListView、GridView，RecyclerView标准化了ViewHolder，而且更加灵活，可以轻松实现ListView实现不了的样式和功能。我们使用的`com.github.thorbenprimke:realm-recyclerview` 依赖包在在jitpack.io上， 所以我们还需要配置一下仓库地址：
 347 | 
 348 | ```
 349 | repositories {
 350 |     mavenCentral()
 351 |     maven { url "https://jitpack.io" }
 352 | }
 353 | ```
 354 | 
 355 | 
 356 | 提示：realm-recyclerview的 Github 地址是 https://github.com/thorbenprimke/realm-recyclerview
 357 | 
 358 | 另外， Kotlin使用 Realm 还要加上注解处理的依赖库：
 359 | ```
 360 |     // kotlin使用realm的注解处理依赖库
 361 |     kapt "io.realm:realm-annotations:0.87.1"
 362 |     kapt "io.realm:realm-annotations-processor:0.87.1"
 363 | ```
 364 | 
 365 | 
 366 | 
 367 | 
 368 | 
 369 | ### 13.6.5 Butter Knife依赖
 370 | 
 371 | Butter Knife是基于注解处理方式工作：通过对代码注解自动生成模板代码。我们添加其依赖如下：
 372 | 
 373 | ```
 374 |     // Butter Knife，专门为Android View设计的绑定注解，专业解决各种findViewById
 375 |     compile 'com.jakewharton:butterknife:8.7.0'
 376 |     annotationProcessor 'com.jakewharton:butterknife-compiler:8.7.0'
 377 | ```
 378 | 
 379 | Butter Knife主要是用来做Android视图的成员变量和属性的数据绑定。在开发过程中，我们通常要写大量的findViewById和点击事件，像初始view、设置view监听这样简单而重复的操作会显得比较繁琐。而我们有了 Butter Knife，就可以通过使用注解直接生成样板代码。例如，在 Java 中我们可以通过在字段上使用 @BindView 来替代 findViewById 的调用。上面的配置中的`annotationProcessor 'com.jakewharton:butterknife-compiler:8.7.0'`就是来处理这些注解从而生成样板代码的。
 380 | 
 381 | 
 382 | ```
 383 | @Bind(R.id.todo_item_todo_title)
 384 | public TextView todoTitle;
 385 | 
 386 | @Bind(R.id.todo_item_todo_content)
 387 | public TextView todoContent;
 388 | ```
 389 | 
 390 | 而在 Kotlin 中使用Butter Knife情况有些不同，需要作额外的配置。
 391 | 
 392 | 如果在Kotlin中直接使用ButterKnife的注解方式的话，会出现空指针的异常，导致绑定失败。例如
 393 | ```
 394 | @Bind(R.id.todos_recycler_view)
 395 | var realmRecyclerView: RealmRecyclerView? = null
 396 | ```
 397 | 运行会报错：
 398 | ```
 399 | Caused by: kotlin.KotlinNullPointerException 
 400 | at com.easy.kotlin.mytodoapplication.TodoListFragment.onResume(TodoListFragment.kt:43)
 401 | ```
 402 | 
 403 | 一般情况下，我们使用Kotlin集成 Java 生态的一些框架的时候，像 Spring Boot，JPA，Butter Knife，Realm等，都需要一些额外的插件或者依赖来“填充缝隙”（例如：all-open, kotterknife，realm-annotations等）， 所谓Kotlin 与 Java 的无缝集成，很多时候并非Java 中怎么用，Kotlin就直接拿过来就怎么用，往往是要再添加一些插件或者额外的配置等。
 404 | 
 405 | 
 406 | 那么要如何才能在Kotlin的环境中使用ButterKnife呢？
 407 | 
 408 | 在早些时候，ButterKnife的作者已经帮我们想好解决方案了，那就是——KotterKnife，见名知意。KotterKnife的GitHub地址是：https://github.com/JakeWharton/kotterknife 。这个插件是建立在ButterKnife 7的基础上的。
 409 | 
 410 | 
 411 | 下面我们配置一下在 Kotlin 中使用 Butter Knife 的依赖库 KotterKnife。
 412 | 
 413 | 首先在repositories中添加KotterKnife的仓库地址（KotterKnife不在 Maven Center 仓库中，而是在oss.sonatype.org仓库中。这么多仓库，要是哪天能统一用一个就方便多了）。
 414 | ```
 415 | repositories {
 416 |     ...
 417 |     maven { url 'https://oss.sonatype.org/content/repositories/snapshots/' }
 418 | }
 419 | ```
 420 | 然后在dependencies里面添加依赖
 421 | ```
 422 | dependencies {
 423 |     ...
 424 |     compile 'com.jakewharton:butterknife:7.0.1'
 425 |     compile 'com.jakewharton:kotterknife:0.1.0-SNAPSHOT'
 426 | }
 427 | ```
 428 | 
 429 | 采用这种方式的配置，我们的视图注入代码如下
 430 | ```
 431 | val todoTitle: TextView by bindView(R.id.todo_item_todo_title)
 432 | val todoContent: TextView by bindView(R.id.todo_item_todo_content)
 433 | ```
 434 | 
 435 | 这样的代码看起来不是那么的优雅，还没有在 Java 中直接使用注解来的简单好看。同时要注意的是，如果使用 kotterknife 0.1.0 + butterknife:7.0.1 ，同时使用 Java 跟 Kotlin 混合编程的场景中使用 Butter Knife，发现配了KotterKnife 之后的 Java 的注解式写法就失效了。也就是说，如果我们上面添加了KotterKnife的依赖，那么 Java 代码中同时使用 Butter Knife 注解的地方会绑定失败。不过这个问题，在后面的新版本中已经解决。例如在butterknife 8.7.0中，我们可以直接添加下面的依赖项：
 436 | 
 437 | ```
 438 |     compile 'com.jakewharton:butterknife:8.7.0'
 439 |     annotationProcessor 'com.jakewharton:butterknife-compiler:8.7.0'
 440 |     kapt 'com.jakewharton:butterknife-compiler:8.7.0'
 441 | ```
 442 | 其中，`annotationProcessor 'com.jakewharton:butterknife-compiler:8.7.0'` 是 Java 的butterknife注解处理器。` kapt 'com.jakewharton:butterknife-compiler:8.7.0'` 是 Kotlin 的butterknife注解处理器（Kotlin Annotation processing tool，kapt）。
 443 | 
 444 | 这样我们的代码就继续优雅简洁下去了：
 445 | 
 446 | ```
 447 | @BindView(R.id.todo_item_todo_title)
 448 | lateinit var todoTitle: TextView
 449 | @BindView(R.id.todo_item_todo_content)
 450 | lateinit var todoContent: TextView
 451 | ```
 452 | 
 453 | 其中，lateinit 修饰符允许声明非空类型，并在对象创建后(构造函数调用后)初始化。 不使用 lateinit 则需要声明可空类型并且有额外的空安全检测操作。
 454 | 
 455 | 当然，我们使用 Butter Knife 的同时，仍然可以使用原生的 findViewById :
 456 | 
 457 | ```
 458 | class MainActivity : AppCompatActivity() {
 459 |     var fab: FloatingActionButton? = null
 460 | 
 461 |     override fun onCreate(savedInstanceState: Bundle?) {
 462 |         super.onCreate(savedInstanceState)
 463 |         setContentView(R.layout.activity_main)
 464 | 
 465 |         val toolbar = findViewById(R.id.toolbar) as Toolbar
 466 |         setSupportActionBar(toolbar)
 467 | 
 468 |         fab = findViewById(R.id.fab) as FloatingActionButton
 469 | 
 470 | 
 471 |         // 添加日程事件
 472 |         fab?.setOnClickListener { _ ->
 473 |             ...
 474 |             hideFab()
 475 |         }
 476 |     }
 477 | 
 478 |     fun hideFab() {
 479 |         fab?.visibility = View.GONE
 480 |     }
 481 | 
 482 |     fun showFab() {
 483 |         fab?.visibility = View.VISIBLE
 484 |     }
 485 | 
 486 | }
 487 | ```
 488 | 
 489 | 
 490 | 
 491 | ## 13.7 将MainActivity.java 转成 Kotlin 代码
 492 | 
 493 | 选中默认生成的MainActivity.java， 我们使用 IDEA 的 Code > Convert Java File to Kotlin File :
 494 | 
 495 | ![螢幕快照 2017-07-21 16.19.35.png](http://upload-images.jianshu.io/upload_images/1233356-0ca9bcd9e85ac9f5.png?imageMogr2/auto-orient/strip%7CimageView2/2/w/1240)
 496 | 
 497 | 
 498 | 点击转换，即可看到转换成 Kotlin 的代码：
 499 | 
 500 | ```
 501 | package com.easy.kotlin.mytodoapplication
 502 | 
 503 | import android.os.Bundle
 504 | import android.support.design.widget.FloatingActionButton
 505 | import android.support.design.widget.Snackbar
 506 | import android.support.v7.app.AppCompatActivity
 507 | import android.support.v7.widget.Toolbar
 508 | import android.view.Menu
 509 | import android.view.MenuItem
 510 | 
 511 | class MainActivity : AppCompatActivity() {
 512 | 
 513 |     override fun onCreate(savedInstanceState: Bundle?) {
 514 |         super.onCreate(savedInstanceState)
 515 |         setContentView(R.layout.activity_main)
 516 |         val toolbar = findViewById(R.id.toolbar) as Toolbar
 517 |         setSupportActionBar(toolbar)
 518 | 
 519 |         val fab = findViewById(R.id.fab) as FloatingActionButton
 520 |         fab.setOnClickListener { view ->
 521 |             Snackbar.make(view, "Replace with your own action", Snackbar.LENGTH_LONG)
 522 |                     .setAction("Action", null).show()
 523 |         }
 524 |     }
 525 | 
 526 |     override fun onCreateOptionsMenu(menu: Menu): Boolean {
 527 |         // Inflate the menu; this adds items to the action bar if it is present.
 528 |         menuInflater.inflate(R.menu.menu_main, menu)
 529 |         return true
 530 |     }
 531 | 
 532 |     override fun onOptionsItemSelected(item: MenuItem): Boolean {
 533 |         // Handle action bar item clicks here. The action bar will
 534 |         // automatically handle clicks on the Home/Up button, so long
 535 |         // as you specify a parent activity in AndroidManifest.xml.
 536 |         val id = item.itemId
 537 | 
 538 | 
 539 |         if (id == R.id.action_settings) {
 540 |             return true
 541 |         }
 542 | 
 543 |         return super.onOptionsItemSelected(item)
 544 |     }
 545 | }
 546 | 
 547 | ```
 548 | 
 549 | 
 550 | 看，这就是Android 开发者，从 Java无缝转到 Kotlin 的过程。
 551 | 
 552 | 我们把这个MainActivity.kt放到对应的 src/main/kotlin 目录下。首先新建`package com.easy.kotlin.mytodoapplication` , 直接在 IDEA 中把这个MainActivity.kt 拖到这个package 下面即可。现在我们的工程目录是下面这个样子
 553 | 
 554 | ![螢幕快照 2017-07-21 16.26.14.png](http://upload-images.jianshu.io/upload_images/1233356-1b7628842782b84e.png?imageMogr2/auto-orient/strip%7CimageView2/2/w/1240)
 555 | 
 556 | 
 557 | 
 558 | 
 559 | ## 13.8 在 Kotlin 中使用 Realm
 560 | 
 561 | 我们需要添加针对 Kotlin 的realm注解处理的库：
 562 | 
 563 | ```
 564 |     kapt "io.realm:realm-annotations:0.87.1"
 565 |     kapt "io.realm:realm-annotations-processor:0.87.1"
 566 | ```
 567 | 
 568 | 
 569 | ## 13.9 添加日程实体类
 570 | 
 571 | 我们先从领域模型的建立开始。首先我们需要设计一个极简的待办事项的实体类 Todo, 它有主键 id、标题、内容三个字段。
 572 | 
 573 | ```
 574 | @RealmClass
 575 | open class Todo : RealmObject() {
 576 |     @PrimaryKey
 577 |     open var id: String = "-1"
 578 |     open var title: String = "日程"
 579 |     open var content: String = "事项"
 580 | }
 581 | ```
 582 | 
 583 | 然后，我们写一个应用程序入口类`MyTodoApplication`继承`android.app.Application`, 在 onCreate() 里面初始化 Realm 数据库的配置。代码如下：
 584 | 
 585 | ```
 586 | class MyTodoApplication : Application() {
 587 |     override fun onCreate() {
 588 |         super.onCreate()
 589 | 
 590 |         val config = RealmConfiguration.Builder(this)
 591 |                 .name("realm.my_todos")// 库文件名
 592 |                 .encryptionKey(getKey())  // 加密
 593 |                 .schemaVersion(1)  // 版本号
 594 |                 .deleteRealmIfMigrationNeeded()
 595 |                 .build()
 596 | 
 597 |         Realm.setDefaultConfiguration(config)// 设置默认 RealmConfiguration
 598 |         
 599 |     }
 600 | 
 601 |     /**
 602 |      * 64 bits
 603 |      * @return
 604 |      */
 605 |     private fun getKey(): ByteArray {
 606 |         return byteArrayOf(0, 1, 2, 3, 4, 3, 2, 1, 0, 1, 2, 3, 4, 3, 2, 1, 0, 1, 2, 3, 4, 3, 2, 1, 0, 1, 2, 3, 4, 3, 2, 1, 0, 1, 2, 3, 4, 3, 2, 1, 0, 1, 2, 3, 4, 3, 2, 1, 0, 1, 2, 3, 4, 3, 2, 1, 0, 1, 2, 3, 4, 3, 2, 1)
 607 |     }
 608 | }
 609 | ```
 610 | 
 611 | RealmConfiguration.Builder里面如果没有deleteRealmIfMigrationNeeded()的话，会如下报错误：
 612 | 
 613 | ```
 614 | Caused by: io.realm.exceptions.RealmMigrationNeededException: 
 615 | RealmMigration must be provided ...
 616 | at com.easy.kotlin.mytodoapplication.TodoListFragment.onActivityCreated(TodoListFragment.kt:36)
 617 | ```
 618 | 
 619 | 
 620 | 提示： 更多关于 realm 数据库的相关内容可参考 https://realm.io/docs/
 621 | 
 622 | 
 623 | 
 624 | ## 13.10 添加日程事件
 625 | 
 626 | 现在我们点击添加日程的浮层按钮中，添加切换到 “日程添加编辑” `TodoEditFragment`的逻辑。
 627 | 
 628 | ```
 629 | // 添加日程事件
 630 | fab?.setOnClickListener { _ ->
 631 |     // Snackbar.make(view, "Replace with your own action", Snackbar.LENGTH_LONG).setAction("Action", null).show()
 632 |     val todoEditFragment = TodoEditFragment()
 633 |     getSupportFragmentManager()
 634 |             .beginTransaction()
 635 |             .replace(R.id.content_main, todoEditFragment, todoEditFragment.javaClass.getSimpleName())
 636 |             .addToBackStack(todoEditFragment.javaClass.getSimpleName())
 637 |             .commit()
 638 | 
 639 |     hideFab()
 640 | }
 641 | ```
 642 | 
 643 | ## 13.11 添加日程界面
 644 | 
 645 | 下面我们来完成这个添加日程的界面。
 646 | 
 647 | ![Screenshot_1500666104.png](http://upload-images.jianshu.io/upload_images/1233356-967218566488993f.png?imageMogr2/auto-orient/strip%7CimageView2/2/w/1240)
 648 | 
 649 | 
 650 | 我们采用Fragment来实现。首先新建一个TodoEditFragment继承Fragment() ：
 651 | ```
 652 | class TodoEditFragment : Fragment() {
 653 |     val realm: Realm = Realm.getDefaultInstance()
 654 |     var todo: Todo? = null
 655 | 
 656 |     companion object {
 657 |         val TODO_ID_KEY: String = "todo_id_key"
 658 | 
 659 |         fun newInstance(id: String): TodoEditFragment {
 660 |             var args: Bundle = Bundle()
 661 |             args.putString(TODO_ID_KEY, id)
 662 |             var todoEditFragment: TodoEditFragment = newInstance()
 663 |             todoEditFragment.arguments = args
 664 |             return todoEditFragment
 665 |         }
 666 | 
 667 |         fun newInstance(): TodoEditFragment {
 668 |             return TodoEditFragment()
 669 |         }
 670 |     }
 671 | 
 672 |     override fun onCreateView(inflater: LayoutInflater?, container: ViewGroup?, savedInstanceState: Bundle?): View? {
 673 |         return UI {
 674 |             // AnkoContext
 675 | 
 676 |             verticalLayout {
 677 |                 padding = dip(30)
 678 |                 var title = editText {
 679 |                     // editText 视图
 680 |                     id = R.id.todo_title
 681 |                     hintResource = R.string.title_hint
 682 |                 }
 683 | 
 684 |                 var content = editText {
 685 |                     id = R.id.todo_content
 686 |                     height = 400
 687 |                     hintResource = R.string.content_hint
 688 |                 }
 689 |                 button {
 690 |                     // button 视图
 691 |                     id = R.id.todo_add
 692 |                     textResource = R.string.add_todo
 693 |                     textColor = Color.WHITE
 694 |                     setBackgroundColor(Color.DKGRAY)
 695 |                     onClick { _ -> createTodoFrom(title, content) }
 696 |                 }
 697 |             }
 698 |         }.view
 699 |     }
 700 | 
 701 |     override fun onActivityCreated(savedInstanceState: Bundle?) {
 702 |         super.onActivityCreated(savedInstanceState)
 703 | 
 704 |         if (arguments != null && arguments.containsKey(TODO_ID_KEY)) {
 705 | 
 706 |             val todoId = arguments.getString(TODO_ID_KEY)
 707 |             todo = realm.where(Todo::class.java).equalTo("id", todoId).findFirst()
 708 | 
 709 |             val todoTitle = find<EditText>(R.id.todo_title)
 710 |             todoTitle.setText(todo?.title)
 711 | 
 712 |             val todoContent = find<EditText>(R.id.todo_content)
 713 |             todoContent.setText(todo?.content)
 714 | 
 715 |             val add = find<Button>(R.id.todo_add)
 716 |             add.setText(R.string.save)
 717 |         }
 718 |     }
 719 | 
 720 |     override fun onDestroy() {
 721 |         super.onDestroy()
 722 |         realm.close()
 723 |     }
 724 | 
 725 | 
 726 |     /**
 727 |      *  新增待办事项，存入Realm数据库
 728 |      *
 729 |      *  @param title the title edit text.
 730 |      *  @param todoContent the content edit text.
 731 |      */
 732 |     private fun createTodoFrom(title: EditText, todoContent: EditText) {
 733 | 
 734 |         realm.beginTransaction()
 735 |         // Either update the edited object or create a new one.
 736 |         var t = todo ?: realm.createObject(Todo::class.java)
 737 |         t.id = todo?.id ?: UUID.randomUUID().toString()
 738 |         t.title = title.text.toString()
 739 |         t.content = todoContent.text.toString()
 740 | 
 741 |         realm.commitTransaction()
 742 |         activity.supportFragmentManager.popBackStack()
 743 |     }
 744 | 
 745 | 
 746 | }
 747 | ```
 748 | 
 749 | 其中，我们重点讲下 Anko 的 UI 布局部分的代码。
 750 | 
 751 | ```
 752 | return UI {
 753 |     // AnkoContext
 754 | 
 755 |     verticalLayout {
 756 |         padding = dip(30)
 757 |         var title = editText {
 758 |             // editText 视图
 759 |             id = R.id.todo_title
 760 |             hintResource = R.string.title_hint
 761 |         }
 762 | 
 763 |         var content = editText {
 764 |             id = R.id.todo_content
 765 |             height = 400
 766 |             hintResource = R.string.content_hint
 767 |         }
 768 |         button {
 769 |             // button 视图
 770 |             id = R.id.todo_add
 771 |             textResource = R.string.add_todo
 772 |             textColor = Color.WHITE
 773 |             setBackgroundColor(Color.DKGRAY)
 774 |             onClick { _ -> createTodoFrom(title, content) }
 775 |         }
 776 |     }
 777 | }.view
 778 | ```
 779 | 
 780 | 我们使用 Kotlin 的代码 Anko DSL 创建了一个垂直方向的线性布局(用代码写配置写布局要比 XML 灵活方便多了)。 其中 UI 函数
 781 | ```
 782 | fun Fragment.UI(init: AnkoContext<Fragment>.() -> Unit) = createAnkoContext(activity, init)
 783 | 
 784 | ```
 785 | 是Fragment的扩展函数，它接收一个函数
 786 | 
 787 | ```
 788 | init: AnkoContext<Fragment>.() -> Unit
 789 | ```
 790 | init 的入参是AnkoContext类型。
 791 | 
 792 | 而verticalLayout函数则是ViewManager的内联扩展函数。
 793 | 
 794 | ```
 795 | inline fun ViewManager.verticalLayout(init: _LinearLayout.() -> Unit): LinearLayout {
 796 |     return ankoView(`$$Anko$Factories$CustomViews`.VERTICAL_LAYOUT_FACTORY, init)
 797 | }
 798 | ```
 799 | 
 800 | 从这些例子我们可以看出 Kotlin 的函数扩展功能相当实用，尤其在 DSL 中用的非常广泛。
 801 | 
 802 | 
 803 | 在 verticalLayout 代码段内部，创建了三个Android的控件 - 两个 editText 视图和一个 button 视图。这里视图的属性都在一行里面设置好了。
 804 | 
 805 | ```
 806 | padding = dip(30)
 807 | var title = editText {
 808 |     // editText 视图
 809 |     id = R.id.todo_title
 810 |     hintResource = R.string.title_hint
 811 | }
 812 | 
 813 | var content = editText {
 814 |     id = R.id.todo_content
 815 |     height = 400
 816 |     hintResource = R.string.content_hint
 817 | }
 818 | button {
 819 |     // button 视图
 820 |     id = R.id.todo_add
 821 |     textResource = R.string.add_todo
 822 |     textColor = Color.WHITE
 823 |     setBackgroundColor(Color.DKGRAY)
 824 |     onClick { _ -> createTodoFrom(title, content) }
 825 | }
 826 | ```
 827 | 这样的视图文件要比 XML 优雅许多了，XML 的配置有时候让人看了就心生烦恼。
 828 | 
 829 | 我们可以看下按钮控件定义的地方。按钮有一个点击监听函数是定义在视图定义文件里面的。在定义按钮之前，有两个参数 title 和 content 的方法 createTodoFrom 已经被调用了。最后，通过在 AnkoContext （UI 类）上调用 view 属性`UI {...}.view`来返回视图。
 830 | 
 831 | 
 832 | 
 833 | 这里的 ids 被设置为 R.id.<id_name>。这些 ids 需要手工在一个加做 ids.xml 的文件里创建，这个文件放在 app/src/main/res/values/ids.xml。如果这个文件不存在就创建它。文件内容如下：
 834 | 
 835 | ```
 836 | <?xml version="1.0" encoding="utf-8"?>
 837 | <resources>
 838 |     <item name="todo_title" type="id" />
 839 |     <item name="todo_content" type="id" />
 840 |     <item name="todo_add" type="id" />
 841 | </resources>
 842 | ```
 843 | 这个 ids.xml 文件定义了所有能够被代码引用到的各种视图的 ids。
 844 | 
 845 | 
 846 | ## 13.12 保存到 Realm 中
 847 | 
 848 | 新增待办事项，存入Realm数据库：
 849 | 
 850 | ```
 851 |     private fun createTodoFrom(title: EditText, todoContent: EditText) {
 852 | 
 853 |         realm.beginTransaction()
 854 |         // Either update the edited object or create a new one.
 855 |         var t = todo ?: realm.createObject(Todo::class.java)
 856 |         t.id = todo?.id ?: UUID.randomUUID().toString()
 857 |         t.title = title.text.toString()
 858 |         t.content = todoContent.text.toString()
 859 | 
 860 |         realm.commitTransaction()
 861 | 
 862 |         activity.supportFragmentManager.popBackStack()
 863 |     }
 864 | ```
 865 | 
 866 | 
 867 | 
 868 | 
 869 | ## 13.13 用RecyclerView 来展示待办事项
 870 | 
 871 | 下面我们来实现这个页面。
 872 | 
 873 | 
 874 | ![Screenshot_1500667248.png](http://upload-images.jianshu.io/upload_images/1233356-965e8a49b3f96510.png?imageMogr2/auto-orient/strip%7CimageView2/2/w/1240)
 875 | 
 876 | 
 877 | 首先，这个是主页面，对应 activity_main.xml 视图, 文件内容如下：
 878 | 
 879 | ```
 880 | 
 881 | <?xml version="1.0" encoding="utf-8"?>
 882 | <android.support.design.widget.CoordinatorLayout
 883 |     xmlns:android="http://schemas.android.com/apk/res/android"
 884 |     xmlns:app="http://schemas.android.com/apk/res-auto"
 885 |     xmlns:tools="http://schemas.android.com/tools"
 886 |     android:layout_width="match_parent"
 887 |     android:layout_height="match_parent"
 888 |     android:fitsSystemWindows="true"
 889 |     tools:context="com.easy.kotlin.mytodoapplication.MainActivity">
 890 | 
 891 |     <android.support.design.widget.AppBarLayout
 892 |         android:layout_width="match_parent"
 893 |         android:layout_height="wrap_content"
 894 |         android:theme="@style/AppTheme.AppBarOverlay">
 895 | 
 896 |         <android.support.v7.widget.Toolbar
 897 |             android:id="@+id/toolbar"
 898 |             android:layout_width="match_parent"
 899 |             android:layout_height="?attr/actionBarSize"
 900 |             android:background="?attr/colorPrimaryDark"
 901 |             app:popupTheme="@style/AppTheme.PopupOverlay" />
 902 | 
 903 |     </android.support.design.widget.AppBarLayout>
 904 | 
 905 |     <include layout="@layout/content_main" />
 906 | 
 907 |     <android.support.design.widget.FloatingActionButton
 908 |         android:id="@+id/fab"
 909 |         android:layout_width="wrap_content"
 910 |         android:layout_height="wrap_content"
 911 |         android:layout_gravity="bottom|end"
 912 |         android:layout_margin="@dimen/fab_margin"
 913 |         app:srcCompat="@drawable/ic_content_add" />
 914 | 
 915 | </android.support.design.widget.CoordinatorLayout>
 916 | 
 917 | ```
 918 | 
 919 | 
 920 | 我们的待办事项列表视图是fragment_todos.xml， 文件内容如下：
 921 | ```
 922 | <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
 923 |     xmlns:app="http://schemas.android.com/apk/res-auto"
 924 |     xmlns:tools="http://schemas.android.com/tools"
 925 |     android:layout_width="match_parent"
 926 |     android:layout_height="match_parent"
 927 |     android:paddingBottom="@dimen/activity_vertical_margin"
 928 |     android:paddingLeft="@dimen/activity_horizontal_margin"
 929 |     android:paddingRight="@dimen/activity_horizontal_margin"
 930 |     android:paddingTop="@dimen/activity_vertical_margin"
 931 |     tools:context=".TodosFragment"
 932 |     tools:showIn="@layout/activity_main">
 933 | 
 934 |     <co.moonmonkeylabs.realmrecyclerview.RealmRecyclerView
 935 |         android:id="@+id/todos_recycler_view"
 936 |         android:layout_width="match_parent"
 937 |         android:layout_height="match_parent"
 938 |         app:rrvEmptyLayoutId="@layout/empty_view"
 939 |         app:rrvIsRefreshable="false"
 940 |         app:rrvLayoutType="LinearLayout" />
 941 | 
 942 | </RelativeLayout>
 943 | 
 944 | ```
 945 | 
 946 | 
 947 | 我们看下`RealmRecyclerView`的配置：
 948 | 
 949 | |配置项 | 功能说明|
 950 | |-------|--------------|
 951 | |app:rrvEmptyLayoutId|当列表为空的时候的显示页面|
 952 | |app:rrvIsRefreshable|是否支持下拉刷新，通过setOnRefreshListener 或 setRefreshing来进行事件处理|
 953 | |app:rrvLayoutType| 配置LayoutManager，可选项是：LinearLayout，Grid，LinearLayoutWithHeaders等|
 954 | 
 955 | 
 956 | 
 957 | 
 958 | 
 959 | 
 960 | 
 961 | 下面我们来实现这个TodosFragment 。
 962 | 
 963 | 首先新建TodosFragment类，继承如下面代码所示：
 964 | ```
 965 | class TodosFragment : Fragment(), TodoAdapter.TodoItemClickListener {
 966 |     @BindView(R.id.todos_recycler_view)
 967 |     lateinit var realmRecyclerView: RealmRecyclerView
 968 | 
 969 |     private var realm: Realm? = null
 970 |     ...
 971 | }
 972 | ```
 973 | 
 974 | 其中，TodoAdapter是继承了RealmBasedRecyclerViewAdapter的适配器类。我们在 TodoAdapter 里面定义了一个视图持有类：
 975 | ```
 976 |     inner class ViewHolder(view: View, private val clickListener: TodoItemClickListener?) :
 977 |             RealmViewHolder(view), View.OnClickListener {
 978 | 
 979 |         // Bind a field to the view for the specified ID. The view will automatically be cast to the field type
 980 |         @BindView(R.id.todo_item_todo_title)
 981 |         lateinit var todoTitle: TextView
 982 |         // val todoTitle: TextView by bindView(R.id.todo_item_todo_title)
 983 |         @BindView(R.id.todo_item_todo_content)
 984 |         lateinit var todoContent: TextView
 985 |         // val todoContent: TextView by bindView(R.id.todo_item_todo_content)
 986 | 
 987 |         init {
 988 |             // Bind annotated fields and methods
 989 |             ButterKnife.bind(this, view)
 990 |             view.setOnClickListener(this)
 991 |         }
 992 | 
 993 |         override fun onClick(v: View) {
 994 |             clickListener?.onClick(v, realmResults[adapterPosition])
 995 |         }
 996 |     }
 997 | ```
 998 | 在ViewHolder初始化 View 的时候，我们使用ButterKnife进行了绑定
 999 | 
1000 | ```
1001 | init {
1002 |             // Bind annotated fields and methods
1003 |             ButterKnife.bind(this, view)
1004 |             view.setOnClickListener(this)
1005 |         }
1006 | ```
1007 | 
1008 | 
1009 | 
1010 | 
1011 | 待办事项监听器类：
1012 | 
1013 | ```
1014 |     interface TodoItemClickListener {
1015 |         fun onClick(caller: View, todo: Todo)
1016 |     }
1017 | ```
1018 | 
1019 | 
1020 | 我们在TodosFragment中实现这个方法：
1021 | 
1022 | ```
1023 |     override fun onClick(caller: View, todo: Todo) {
1024 |         (activity as MainActivity).hideFab()
1025 | 
1026 |         val todoEditFragment = TodoEditFragment.newInstance(todo.id)
1027 |         activity.supportFragmentManager
1028 |                 .beginTransaction()
1029 |                 .replace(R.id.content_main, todoEditFragment, todoEditFragment.javaClass.getSimpleName())
1030 |                 .addToBackStack(todoEditFragment.javaClass.getSimpleName())
1031 |                 .commit()
1032 |     }
1033 | ```
1034 | 
1035 | 点击待办事项，把当前的content_main切换成编辑事项 EditFragment的视图。
1036 | 
1037 | 
1038 | 
1039 | 
1040 | 
1041 | 然后我们在TodoAdapter中重写RealmBasedRecyclerViewAdapter的onCreateRealmViewHolder和onBindRealmViewHolder方法。
1042 | 
1043 | 
1044 | ```
1045 |     override fun onCreateRealmViewHolder(viewGroup: ViewGroup, viewType: Int): ViewHolder {
1046 |         val v = inflater.inflate(R.layout.todo_item, viewGroup, false)
1047 |         return ViewHolder(v, clickListener)
1048 |     }
1049 | 
1050 |     override fun onBindRealmViewHolder(viewHolder: ViewHolder, position: Int) {
1051 |         val todo = realmResults[position]
1052 | 
1053 |         viewHolder.todoTitle.setText(todo.title)
1054 |         viewHolder.todoTitle.fontFeatureSettings = "font-size:12px"
1055 |         viewHolder.todoTitle.setTextColor(Color.argb(255, 69, 106, 124))
1056 | 
1057 |         viewHolder.todoContent.setText(todo.content)
1058 |     }
1059 | 
1060 | ```
1061 | 
1062 | 
1063 | 我们在添加（保存）完事项的时候，回到之前的列表页面：
1064 | 
1065 | ```
1066 | private fun createTodoFrom(title: EditText, todoContent: EditText) {
1067 |         realm.beginTransaction()
1068 |         // Either update the edited object or create a new one.
1069 |         var t = todo ?: realm.createObject(Todo::class.java)
1070 |         t.id = todo?.id ?: UUID.randomUUID().toString()
1071 |         t.title = title.text.toString()
1072 |         t.content = todoContent.text.toString()
1073 | 
1074 |         realm.commitTransaction()
1075 | 
1076 |         activity.supportFragmentManager.popBackStack()
1077 |     }
1078 | ```
1079 | 
1080 | 当回退到待办事项列表的时候，我们在TodosFragment中的 `onResume()` 函数中来实现数据的更新展示：
1081 | 
1082 | ```
1083 | override fun onResume() {
1084 |         super.onResume()
1085 |         val todos = realm!!.where(Todo::class.java).findAll()
1086 |         Log.i(MY_TAG, "onResume: ${todos}")
1087 |         Log.i(MY_TAG, "onResume: realmRecyclerView = ${realmRecyclerView} ")
1088 |         val adapter = TodoAdapter(activity, todos, true, true, this)
1089 |         realmRecyclerView.setAdapter(adapter)
1090 |     }
1091 | ```
1092 | 
1093 | 其中，`val todos = realm!!.where(Todo::class.java).findAll()` 是去 Realm 数据库中查询出所有Todo对应的实体记录。
1094 | 
1095 | 然后，通过适配器`val adapter = TodoAdapter(activity, todos, true, true, this)`把数据装配到RecyclerView中 `realmRecyclerView.setAdapter(adapter)` 。
1096 | 
1097 | 
1098 | ## 13.14 运行测试
1099 | 
1100 | 编译安装应用，我们就可以看到如下的界面了，我们可以在里面添加编辑我们的待办事项。
1101 | 
1102 | 
1103 | ![Screenshot_1500669269.png](http://upload-images.jianshu.io/upload_images/1233356-53ff659c13e6e703.png?imageMogr2/auto-orient/strip%7CimageView2/2/w/1240)
1104 | 
1105 | ![Screenshot_1500669264.png](http://upload-images.jianshu.io/upload_images/1233356-75d1e23143f7beed.png?imageMogr2/auto-orient/strip%7CimageView2/2/w/1240)
1106 | 
1107 | ![Screenshot_1500669255.png](http://upload-images.jianshu.io/upload_images/1233356-ba713c9d892b6582.png?imageMogr2/auto-orient/strip%7CimageView2/2/w/1240)
1108 | 
1109 | 
1110 | 
1111 | 
1112 | 
1113 | ## 本章小结
1114 | 
1115 | Android 中经常出现的空引用、API的冗余样板式代码等都是是驱动我们转向 Kotlin 语言的动力。另外，Kotlin 的 Android 视图 DSL  Anko帮我们从繁杂的 XML 视图配置文件中解放出来。我们可以像在 Java 中一样方便的使用 Android 开发的流行的库诸如 Butter Knife、Realm、RecyclerView等。当然，我们使用 Kotlin 集成这些库来进行 Andorid 开发，既能够直接使用我们之前的开发库，又能够从 Java 语言、Android API 的限制中出来。这不得不说是一件好事。
1116 | 
1117 | 下一章我们介绍使用 Kotlin 创建 DSL。
1118 | 
1119 | 
1120 | 本章工程源码：
1121 | 
1122 | 
1123 | https://github.com/EasyKotlin/chapter13_kotlin_android
1124 | 
1125 | 
1126 | 
1127 | --------------------------------------
1128 | 
1129 | # 《Kotlin极简教程》正式上架：
1130 | 
1131 | > #### [点击这里 > *去京东商城购买阅读* ](https://item.jd.com/12181725.html)
1132 | > #### [点击这里 > *去天猫商城购买阅读* ](https://detail.tmall.com/item.htm?id=558540170670)
1133 | 
1134 | #### 非常感谢您亲爱的读者，大家请多支持！！！有任何问题，欢迎随时与我交流~
1135 | --------------------------------------
1136 | 


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