├── app
├── .gitignore
├── src
│ ├── main
│ │ ├── res
│ │ │ ├── mipmap-hdpi
│ │ │ │ └── ic_launcher.png
│ │ │ ├── mipmap-mdpi
│ │ │ │ └── ic_launcher.png
│ │ │ ├── mipmap-xhdpi
│ │ │ │ └── ic_launcher.png
│ │ │ ├── mipmap-xxhdpi
│ │ │ │ └── ic_launcher.png
│ │ │ ├── mipmap-xxxhdpi
│ │ │ │ └── ic_launcher.png
│ │ │ ├── values
│ │ │ │ ├── colors.xml
│ │ │ │ ├── strings.xml
│ │ │ │ ├── dimens.xml
│ │ │ │ └── styles.xml
│ │ │ ├── values-v21
│ │ │ │ └── styles.xml
│ │ │ ├── values-w820dp
│ │ │ │ └── dimens.xml
│ │ │ └── layout
│ │ │ │ ├── content_behavior.xml
│ │ │ │ ├── activity_main.xml
│ │ │ │ ├── activity_splash.xml
│ │ │ │ ├── content_splash.xml
│ │ │ │ └── activity_behavior.xml
│ │ ├── java
│ │ │ └── com
│ │ │ │ └── luowei
│ │ │ │ └── nestedscrollingdemo
│ │ │ │ ├── MainActivity.java
│ │ │ │ ├── behaviors
│ │ │ │ ├── BehaviorActivity.java
│ │ │ │ └── MyBehavior.java
│ │ │ │ ├── SplashActivity.java
│ │ │ │ ├── ParentView.java
│ │ │ │ ├── ChildView.java
│ │ │ │ └── MiddleView.java
│ │ └── AndroidManifest.xml
│ ├── test
│ │ └── java
│ │ │ └── com
│ │ │ └── luowei
│ │ │ └── nestedscrollingdemo
│ │ │ └── ExampleUnitTest.java
│ └── androidTest
│ │ └── java
│ │ └── com
│ │ └── luowei
│ │ └── nestedscrollingdemo
│ │ └── ApplicationTest.java
├── proguard-rules.pro
└── build.gradle
├── settings.gradle
├── gif
└── GIF.gif
├── README.md
├── .gitignore
├── gradle.properties
├── NestedScrollingDemo.iml
├── gradlew.bat
└── gradlew
/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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/gif/GIF.gif:
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https://raw.githubusercontent.com/0wei/NestedScrollingDemo/HEAD/gif/GIF.gif
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/README.md:
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1 | # NestedScrollingDemo
2 | 
3 |
4 |
5 | #License
6 | MIT
7 |
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/.gitignore:
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1 | .gradle
2 | /local.properties
3 | /.idea/workspace.xml
4 | /.idea/libraries
5 | .DS_Store
6 | /build
7 | /captures
8 |
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/app/src/main/res/mipmap-hdpi/ic_launcher.png:
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https://raw.githubusercontent.com/0wei/NestedScrollingDemo/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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https://raw.githubusercontent.com/0wei/NestedScrollingDemo/HEAD/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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https://raw.githubusercontent.com/0wei/NestedScrollingDemo/HEAD/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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https://raw.githubusercontent.com/0wei/NestedScrollingDemo/HEAD/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/0wei/NestedScrollingDemo/HEAD/app/src/main/res/mipmap-xxxhdpi/ic_launcher.png
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/app/src/main/res/values/colors.xml:
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1 |
2 |
3 | #3F51B5
4 | #303F9F
5 | #FF4081
6 |
7 |
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/app/src/main/res/values/strings.xml:
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1 |
2 | NestedScrollingDemo
3 | BehaviorActivity
4 | SplashActivity
5 |
6 |
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/app/src/main/res/values/dimens.xml:
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1 |
2 |
3 | 16dp
4 | 16dp
5 | 16dp
6 |
7 |
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/app/src/main/res/values-v21/styles.xml:
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1 | >
2 |
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9 |
10 |
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/app/src/main/res/values-w820dp/dimens.xml:
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1 |
2 |
5 | 64dp
6 |
7 |
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/app/src/test/java/com/luowei/nestedscrollingdemo/ExampleUnitTest.java:
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1 | package com.luowei.nestedscrollingdemo;
2 |
3 | import org.junit.Test;
4 |
5 | import static org.junit.Assert.*;
6 |
7 | /**
8 | * To work on unit tests, switch the Test Artifact in the Build Variants view.
9 | */
10 | public class ExampleUnitTest {
11 | @Test
12 | public void addition_isCorrect() throws Exception {
13 | assertEquals(4, 2 + 2);
14 | }
15 | }
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/app/src/main/java/com/luowei/nestedscrollingdemo/MainActivity.java:
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1 | package com.luowei.nestedscrollingdemo;
2 |
3 | import android.os.Bundle;
4 |
5 | import androidx.appcompat.app.AppCompatActivity;
6 |
7 | public class MainActivity extends AppCompatActivity {
8 |
9 | @Override
10 | protected void onCreate(Bundle savedInstanceState) {
11 | super.onCreate(savedInstanceState);
12 | setContentView(R.layout.activity_main);
13 | }
14 | }
15 |
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/app/src/androidTest/java/com/luowei/nestedscrollingdemo/ApplicationTest.java:
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1 | package com.luowei.nestedscrollingdemo;
2 |
3 | import android.app.Application;
4 | import android.test.ApplicationTestCase;
5 |
6 | /**
7 | * Testing Fundamentals
8 | */
9 | public class ApplicationTest extends ApplicationTestCase {
10 | public ApplicationTest() {
11 | super(Application.class);
12 | }
13 | }
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/app/src/main/java/com/luowei/nestedscrollingdemo/behaviors/BehaviorActivity.java:
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1 | package com.luowei.nestedscrollingdemo.behaviors;
2 |
3 | import android.os.Bundle;
4 |
5 |
6 | import androidx.appcompat.app.AppCompatActivity;
7 | import androidx.appcompat.widget.Toolbar;
8 |
9 | import com.luowei.nestedscrollingdemo.R;
10 |
11 | public class BehaviorActivity extends AppCompatActivity {
12 |
13 | @Override
14 | protected void onCreate(Bundle savedInstanceState) {
15 | super.onCreate(savedInstanceState);
16 | setContentView(R.layout.activity_behavior);
17 | Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
18 | setSupportActionBar(toolbar);
19 | }
20 |
21 | }
22 |
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/app/proguard-rules.pro:
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1 | # Add project specific ProGuard rules here.
2 | # By default, the flags in this file are appended to flags specified
3 | # in D:\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 |
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/app/build.gradle:
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1 | apply plugin: 'com.android.application'
2 |
3 | android {
4 | compileSdkVersion 30
5 | buildToolsVersion "23.0.3"
6 |
7 | defaultConfig {
8 | applicationId "com.demo"
9 | minSdkVersion 15
10 | targetSdkVersion 30
11 | versionCode 1
12 | versionName "1.0"
13 | }
14 | buildTypes {
15 | release {
16 | minifyEnabled false
17 | proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
18 | }
19 | }
20 | }
21 |
22 | dependencies {
23 | compile fileTree(dir: 'libs', include: ['*.jar'])
24 | testCompile 'junit:junit:4.12'
25 | compile 'androidx.appcompat:appcompat:1.0.0'
26 | compile 'com.google.android.material:material:1.0.0'
27 | }
28 |
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/app/src/main/res/values/styles.xml:
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1 |
2 |
3 |
4 |
10 |
11 |
15 |
16 |
17 |
18 |
19 |
20 |
21 |
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/app/src/main/res/layout/content_behavior.xml:
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1 |
2 |
14 |
15 |
16 |
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/gradle.properties:
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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 | # Default value: -Xmx10248m -XX:MaxPermSize=256m
13 | # org.gradle.jvmargs=-Xmx2048m -XX:MaxPermSize=512m -XX:+HeapDumpOnOutOfMemoryError -Dfile.encoding=UTF-8
14 |
15 | # When configured, Gradle will run in incubating parallel mode.
16 | # This option should only be used with decoupled projects. More details, visit
17 | # http://www.gradle.org/docs/current/userguide/multi_project_builds.html#sec:decoupled_projects
18 | # org.gradle.parallel=true
19 | android.enableJetifier=true
20 | android.useAndroidX=true
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/NestedScrollingDemo.iml:
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1 |
2 |
3 |
4 |
5 |
6 |
7 |
8 |
9 |
10 |
11 |
12 |
13 |
14 |
15 |
16 |
17 |
18 |
19 |
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/app/src/main/AndroidManifest.xml:
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1 |
2 |
4 |
5 |
11 |
12 |
13 |
14 |
18 |
22 |
23 |
24 |
25 |
26 |
27 |
28 |
29 |
30 |
31 |
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/app/src/main/res/layout/activity_main.xml:
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1 |
2 |
11 |
12 |
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17 |
21 |
22 |
26 |
27 |
28 |
29 |
30 |
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/app/src/main/res/layout/activity_splash.xml:
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1 |
2 |
9 |
10 |
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15 |
21 |
22 |
23 |
24 |
25 |
26 |
33 |
34 |
35 |
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/app/src/main/res/layout/content_splash.xml:
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1 |
2 |
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15 |
25 |
26 |
36 |
37 |
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/app/src/main/java/com/luowei/nestedscrollingdemo/SplashActivity.java:
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1 | package com.luowei.nestedscrollingdemo;
2 |
3 | import android.app.Activity;
4 | import android.content.Intent;
5 | import android.os.Bundle;
6 | import android.view.View;
7 |
8 | import androidx.appcompat.app.AppCompatActivity;
9 | import androidx.appcompat.widget.Toolbar;
10 |
11 | import com.google.android.material.floatingactionbutton.FloatingActionButton;
12 | import com.google.android.material.snackbar.Snackbar;
13 | import com.luowei.nestedscrollingdemo.behaviors.BehaviorActivity;
14 |
15 | public class SplashActivity extends AppCompatActivity {
16 |
17 | @Override
18 | protected void onCreate(Bundle savedInstanceState) {
19 | super.onCreate(savedInstanceState);
20 | setContentView(R.layout.activity_splash);
21 | Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
22 | setSupportActionBar(toolbar);
23 |
24 | FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.fab);
25 | fab.setOnClickListener(new View.OnClickListener() {
26 | @Override
27 | public void onClick(View view) {
28 | Snackbar.make(view, "Replace with your own action", Snackbar.LENGTH_LONG)
29 | .setAction("Action", null).show();
30 | }
31 | });
32 | }
33 |
34 | public void nestClick(View view) {
35 | launch(MainActivity.class);
36 | }
37 |
38 | private void launch(Class aClass) {
39 | startActivity(new Intent(this,aClass));
40 | }
41 |
42 | public void behaviorClick(View view) {
43 | launch(BehaviorActivity.class);
44 | }
45 | }
46 |
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/app/src/main/java/com/luowei/nestedscrollingdemo/ParentView.java:
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1 | package com.luowei.nestedscrollingdemo;
2 |
3 | import android.content.Context;
4 | import android.util.AttributeSet;
5 | import android.util.Log;
6 | import android.view.View;
7 | import android.widget.FrameLayout;
8 |
9 | import androidx.core.view.NestedScrollingParent;
10 | import androidx.core.view.NestedScrollingParentHelper;
11 |
12 |
13 | /**
14 | * Created by Luo on 2015/9/17.
15 | */
16 | public class ParentView extends FrameLayout implements NestedScrollingParent {
17 | private NestedScrollingParentHelper parentHelper;
18 |
19 |
20 | public ParentView(Context context, AttributeSet attrs) {
21 | super(context, attrs);
22 | parentHelper = new NestedScrollingParentHelper(this);
23 | }
24 |
25 | //子类请求滑动startNestedScroll()
26 | @Override
27 | public boolean onStartNestedScroll(View child, View target, int nestedScrollAxes) {
28 | //
29 | return true;// super.onStartNestedScroll(child, target, nestedScrollAxes);
30 | }
31 |
32 |
33 | @Override
34 | public void onNestedScrollAccepted(View child, View target, int axes) {
35 | parentHelper.onNestedScrollAccepted(child, target, axes);
36 | }
37 |
38 | @Override
39 | public void onStopNestedScroll(View child) {
40 | parentHelper.onStopNestedScroll(child);
41 | }
42 |
43 |
44 | //子类滑动事件分发回调dispatchNestedPreScroll
45 | @Override
46 | public void onNestedPreScroll(View target, int dx, int dy, int[] consumed) {
47 | if (dx > 0) {
48 | if (target.getRight() + dx > getWidth()) {
49 | dx = target.getRight() + dx - getWidth();
50 | offsetLeftAndRight(dx);
51 | consumed[0] += dx; //将消耗掉的距离返回给子类
52 | }
53 | } else {
54 | if (target.getLeft() + dx < 0) {
55 | dx = target.getLeft() + dx;
56 | offsetLeftAndRight(dx);
57 | consumed[0] += dx;
58 | }
59 | }
60 |
61 | if (dy > 0) {
62 | if (target.getBottom() + dy > getHeight()) {
63 | dy = target.getBottom() +dy- getHeight();
64 | offsetTopAndBottom(dy);
65 | consumed[1] += dy;
66 | }
67 | } else {
68 | if (target.getTop() + dy < 0) {
69 | dy = target.getTop() + dy;
70 | offsetTopAndBottom(dy);
71 | consumed[1] += dy;
72 | }
73 | }
74 |
75 | }
76 |
77 | @Override
78 | public int getNestedScrollAxes() {
79 | return parentHelper.getNestedScrollAxes();
80 | }
81 | }
82 |
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/gradlew.bat:
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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 |
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/app/src/main/res/layout/activity_behavior.xml:
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1 |
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76 |
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/app/src/main/java/com/luowei/nestedscrollingdemo/behaviors/MyBehavior.java:
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1 | package com.luowei.nestedscrollingdemo.behaviors;
2 |
3 | import android.content.Context;
4 | import android.util.AttributeSet;
5 | import android.view.View;
6 |
7 | import androidx.coordinatorlayout.widget.CoordinatorLayout;
8 |
9 |
10 | /**
11 | * Created by LuoWei on 2016/3/22.
12 | */
13 | public class MyBehavior extends CoordinatorLayout.Behavior {
14 |
15 | public MyBehavior() {
16 | super();
17 | }
18 |
19 | public MyBehavior(Context context, AttributeSet attrs) {
20 | super(context, attrs);
21 | }
22 |
23 | @Override
24 | public void onNestedScrollAccepted(CoordinatorLayout coordinatorLayout, View child, View directTargetChild, View target, int nestedScrollAxes) {
25 | super.onNestedScrollAccepted(coordinatorLayout, child, directTargetChild, target, nestedScrollAxes);
26 | // Logger.i("");
27 | }
28 |
29 | @Override
30 | public boolean onStartNestedScroll(CoordinatorLayout coordinatorLayout, View child, View directTargetChild, View target, int nestedScrollAxes) {
31 | // return super.onStartNestedScroll(coordinatorLayout, child, directTargetChild, target, nestedScrollAxes);
32 | // Logger.i("");
33 |
34 | return (nestedScrollAxes & View.SCROLL_AXIS_VERTICAL) != 0;
35 | }
36 |
37 | @Override
38 | public void onStopNestedScroll(CoordinatorLayout coordinatorLayout, View child, View target) {
39 | super.onStopNestedScroll(coordinatorLayout, child, target);
40 | // Logger.i("");
41 |
42 | }
43 |
44 | @Override
45 | public void onNestedScroll(CoordinatorLayout coordinatorLayout, View child, View target, int dxConsumed, int dyConsumed, int dxUnconsumed, int dyUnconsumed) {
46 | super.onNestedScroll(coordinatorLayout, child, target, dxConsumed, dyConsumed, dxUnconsumed, dyUnconsumed);
47 | // Logger.i(" dxConsumed= %d dyConsumed= %d dxUnconsumed= %d dyUnconsumed= %d", dxConsumed, dyConsumed, dxUnconsumed, dyUnconsumed);
48 | }
49 |
50 | @Override
51 | public void onNestedPreScroll(CoordinatorLayout coordinatorLayout, View child, View target, int dx, int dy, int[] consumed) {
52 | super.onNestedPreScroll(coordinatorLayout, child, target, dx, dy, consumed);
53 | // Logger.i(" dx= %d, dy= %d, consumed[0]= %d,consumed[1]= %d", dx, dy, consumed[0], consumed[1]);
54 | dy = dy / 2;
55 | //简单消耗掉一半的距离
56 | consumed[1]+= dy;
57 | child.offsetTopAndBottom(dy);
58 | }
59 |
60 | @Override
61 | public boolean onLayoutChild(CoordinatorLayout parent, View child, int layoutDirection) {
62 | return super.onLayoutChild(parent, child, layoutDirection);
63 | }
64 |
65 | @Override
66 | public boolean onNestedFling(CoordinatorLayout coordinatorLayout, View child, View target, float velocityX, float velocityY, boolean consumed) {
67 | // Logger.i("");
68 | return super.onNestedFling(coordinatorLayout, child, target, velocityX, velocityY, consumed);
69 |
70 | }
71 |
72 | @Override
73 | public boolean onNestedPreFling(CoordinatorLayout coordinatorLayout, View child, View target, float velocityX, float velocityY) {
74 | // Logger.i("");
75 | return super.onNestedPreFling(coordinatorLayout, child, target, velocityX, velocityY);
76 |
77 | }
78 | }
79 |
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/app/src/main/java/com/luowei/nestedscrollingdemo/ChildView.java:
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1 | package com.luowei.nestedscrollingdemo;
2 |
3 | import android.content.Context;
4 | import android.util.AttributeSet;
5 | import android.view.MotionEvent;
6 | import android.view.View;
7 |
8 | import androidx.core.view.NestedScrollingChild;
9 | import androidx.core.view.NestedScrollingChildHelper;
10 | import androidx.core.view.ViewCompat;
11 |
12 |
13 | public class ChildView extends View implements NestedScrollingChild {
14 | private NestedScrollingChildHelper childHelper;
15 | private float ox;
16 | private float oy;
17 | private int[] consumed = new int[2];
18 | private int[] offsetInWindow = new int[2];
19 |
20 | public ChildView(Context context, AttributeSet attrs) {
21 | super(context, attrs);
22 | childHelper = new NestedScrollingChildHelper(this);
23 | //
24 | setNestedScrollingEnabled(true);
25 | }
26 |
27 | @Override
28 | public boolean onTouchEvent(MotionEvent event) {
29 |
30 | switch (event.getAction()) {
31 | case MotionEvent.ACTION_DOWN:
32 | ox = event.getX();
33 | oy = event.getY();
34 | //开始滑动
35 | startNestedScroll(ViewCompat.SCROLL_AXIS_HORIZONTAL | ViewCompat.SCROLL_AXIS_VERTICAL);
36 | break;
37 | case MotionEvent.ACTION_MOVE:
38 |
39 | float clampedX = event.getX();
40 |
41 | float clampedY = event.getY();
42 |
43 |
44 | int dx = (int) (clampedX - ox);
45 | int dy = (int) (clampedY - oy);
46 |
47 | //分发触屏事件给父类处理
48 | if (dispatchNestedPreScroll(dx, dy, consumed, offsetInWindow)) {
49 | //减掉父类消耗的距离
50 | dx -= consumed[0];
51 | dy -= consumed[1];
52 | }
53 | offsetLeftAndRight(dx);
54 | offsetTopAndBottom(dy);
55 | break;
56 | case MotionEvent.ACTION_UP:
57 | stopNestedScroll();
58 | break;
59 | }
60 | return true;/*super.onTouchEvent(event);*/
61 | }
62 |
63 | @Override
64 | public void setNestedScrollingEnabled(boolean enabled) {
65 | childHelper.setNestedScrollingEnabled(enabled);
66 | }
67 |
68 | @Override
69 | public boolean isNestedScrollingEnabled() {
70 | return childHelper.isNestedScrollingEnabled();
71 |
72 | }
73 |
74 | @Override
75 | public boolean startNestedScroll(int axes) {
76 | return childHelper.startNestedScroll(axes);
77 | }
78 |
79 | @Override
80 | public void stopNestedScroll() {
81 | childHelper.stopNestedScroll();
82 |
83 | }
84 |
85 | @Override
86 | public boolean hasNestedScrollingParent() {
87 | return childHelper.hasNestedScrollingParent();
88 | }
89 |
90 | @Override
91 | public boolean dispatchNestedScroll(int dxConsumed, int dyConsumed, int dxUnconsumed, int dyUnconsumed, int[] offsetInWindow) {
92 | return childHelper.dispatchNestedScroll(dxConsumed, dyConsumed, dxUnconsumed, dyUnconsumed, offsetInWindow);
93 | }
94 |
95 | /**
96 | * @param dx 水平滑动距离
97 | * @param dy 垂直滑动距离
98 | * @param consumed 父类消耗掉的距离
99 | * @return
100 | */
101 | @Override
102 | public boolean dispatchNestedPreScroll(int dx, int dy, int[] consumed, int[] offsetInWindow) {
103 | return childHelper.dispatchNestedPreScroll(dx, dy, consumed, offsetInWindow);
104 | }
105 |
106 | @Override
107 | public boolean dispatchNestedFling(float velocityX, float velocityY, boolean consumed) {
108 | return childHelper.dispatchNestedFling(velocityX, velocityY, consumed);
109 | }
110 |
111 | @Override
112 | public boolean dispatchNestedPreFling(float velocityX, float velocityY) {
113 | return childHelper.dispatchNestedPreFling(velocityX, velocityY);
114 | }
115 | }
116 |
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/app/src/main/java/com/luowei/nestedscrollingdemo/MiddleView.java:
--------------------------------------------------------------------------------
1 | package com.luowei.nestedscrollingdemo;
2 |
3 | import android.content.Context;
4 | import android.util.AttributeSet;
5 | import android.view.View;
6 | import android.widget.FrameLayout;
7 |
8 | import androidx.core.view.NestedScrollingChild;
9 | import androidx.core.view.NestedScrollingChildHelper;
10 | import androidx.core.view.NestedScrollingParent;
11 | import androidx.core.view.NestedScrollingParentHelper;
12 | import androidx.core.view.ViewCompat;
13 |
14 | /**
15 | * Created by Luowei on 2015/10/26.
16 | */
17 | public class MiddleView extends FrameLayout implements NestedScrollingChild, NestedScrollingParent {
18 | private NestedScrollingParentHelper parentHelper;
19 | private NestedScrollingChildHelper childHelper;
20 | private int[] offsetInWindow = new int[2];
21 | public MiddleView(Context context, AttributeSet attrs) {
22 | super(context, attrs);
23 | childHelper = new NestedScrollingChildHelper(this);
24 | parentHelper = new NestedScrollingParentHelper(this);
25 | setNestedScrollingEnabled(true);
26 |
27 | }
28 |
29 |
30 | //NestScrollingParent
31 | @Override
32 | public boolean onStartNestedScroll(View child, View target, int nestedScrollAxes) {
33 | //将事件分发到父类
34 | startNestedScroll(ViewCompat.SCROLL_AXIS_HORIZONTAL | ViewCompat.SCROLL_AXIS_VERTICAL);
35 | return true;
36 | // return super.onStartNestedScroll(child, target, nestedScrollAxes);
37 | }
38 |
39 | @Override
40 | public void onNestedScrollAccepted(View child, View target, int axes) {
41 | parentHelper.onNestedScrollAccepted(child, target, axes);
42 | }
43 |
44 | @Override
45 | public void onStopNestedScroll(View child) {
46 | parentHelper.onStopNestedScroll(child);
47 | //将事件分发到父类
48 | stopNestedScroll();
49 | }
50 |
51 |
52 | @Override
53 | public void onNestedPreScroll(View target, int dx, int dy, int[] consumed) {
54 | //将事件分发到父类
55 | if (dispatchNestedPreScroll(dx, dy, consumed, null)) {
56 | dx -= consumed[0];
57 | dy -= consumed[1];
58 | }
59 |
60 | if (dx > 0) {
61 | if (target.getRight() + dx > getWidth()) {
62 | dx = target.getRight() + dx - getWidth();
63 | offsetLeftAndRight(dx);
64 | consumed[0] += dx;
65 | }
66 | } else {
67 | if (target.getLeft() + dx < 0) {
68 | dx = target.getLeft() + dx;
69 | offsetLeftAndRight(dx);
70 | consumed[0] += dx;
71 | }
72 | }
73 |
74 | if (dy > 0) {
75 | if (target.getBottom() + dy > getHeight()) {
76 | dy = target.getBottom() +dy- getHeight();
77 | offsetTopAndBottom(dy);
78 | consumed[1] += dy;
79 | }
80 | } else {
81 | if (target.getTop() + dy < 0) {
82 | dy = target.getTop() + dy;
83 | offsetTopAndBottom(dy);
84 | consumed[1] += dy;
85 | }
86 | }
87 | //
88 | // offsetLeftAndRight(dx);
89 | // offsetTopAndBottom(dy);
90 |
91 | }
92 | @Override
93 | public int getNestedScrollAxes() {
94 | return parentHelper.getNestedScrollAxes();
95 | }
96 |
97 |
98 | //NestedScrollingChild
99 | @Override
100 | public void setNestedScrollingEnabled(boolean enabled) {
101 | childHelper.setNestedScrollingEnabled(enabled);
102 | }
103 |
104 | @Override
105 | public boolean isNestedScrollingEnabled() {
106 | return childHelper.isNestedScrollingEnabled();
107 |
108 | }
109 |
110 | @Override
111 | public boolean startNestedScroll(int axes) {
112 | return childHelper.startNestedScroll(axes);
113 | }
114 |
115 | @Override
116 | public void stopNestedScroll() {
117 | childHelper.stopNestedScroll();
118 |
119 | }
120 |
121 | @Override
122 | public boolean hasNestedScrollingParent() {
123 | return childHelper.hasNestedScrollingParent();
124 | }
125 |
126 | @Override
127 | public boolean dispatchNestedScroll(int dxConsumed, int dyConsumed, int dxUnconsumed, int dyUnconsumed, int[] offsetInWindow) {
128 | return childHelper.dispatchNestedScroll(dxConsumed, dyConsumed, dxUnconsumed, dyUnconsumed, offsetInWindow);
129 | }
130 |
131 | @Override
132 | public boolean dispatchNestedPreScroll(int dx, int dy, int[] consumed, int[] offsetInWindow) {
133 |
134 | return childHelper.dispatchNestedPreScroll(dx, dy, consumed, offsetInWindow);
135 | }
136 |
137 | @Override
138 | public boolean dispatchNestedFling(float velocityX, float velocityY, boolean consumed) {
139 | return childHelper.dispatchNestedFling(velocityX, velocityY, consumed);
140 | }
141 |
142 | @Override
143 | public boolean dispatchNestedPreFling(float velocityX, float velocityY) {
144 | return childHelper.dispatchNestedPreFling(velocityX, velocityY);
145 | }
146 |
147 | }
148 |
--------------------------------------------------------------------------------
/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 | # For Cygwin, ensure paths are in UNIX format before anything is touched.
46 | if $cygwin ; then
47 | [ -n "$JAVA_HOME" ] && JAVA_HOME=`cygpath --unix "$JAVA_HOME"`
48 | fi
49 |
50 | # Attempt to set APP_HOME
51 | # Resolve links: $0 may be a link
52 | PRG="$0"
53 | # Need this for relative symlinks.
54 | while [ -h "$PRG" ] ; do
55 | ls=`ls -ld "$PRG"`
56 | link=`expr "$ls" : '.*-> \(.*\)$'`
57 | if expr "$link" : '/.*' > /dev/null; then
58 | PRG="$link"
59 | else
60 | PRG=`dirname "$PRG"`"/$link"
61 | fi
62 | done
63 | SAVED="`pwd`"
64 | cd "`dirname \"$PRG\"`/" >&-
65 | APP_HOME="`pwd -P`"
66 | cd "$SAVED" >&-
67 |
68 | CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar
69 |
70 | # Determine the Java command to use to start the JVM.
71 | if [ -n "$JAVA_HOME" ] ; then
72 | if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
73 | # IBM's JDK on AIX uses strange locations for the executables
74 | JAVACMD="$JAVA_HOME/jre/sh/java"
75 | else
76 | JAVACMD="$JAVA_HOME/bin/java"
77 | fi
78 | if [ ! -x "$JAVACMD" ] ; then
79 | die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME
80 |
81 | Please set the JAVA_HOME variable in your environment to match the
82 | location of your Java installation."
83 | fi
84 | else
85 | JAVACMD="java"
86 | which java >/dev/null 2>&1 || die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
87 |
88 | Please set the JAVA_HOME variable in your environment to match the
89 | location of your Java installation."
90 | fi
91 |
92 | # Increase the maximum file descriptors if we can.
93 | if [ "$cygwin" = "false" -a "$darwin" = "false" ] ; then
94 | MAX_FD_LIMIT=`ulimit -H -n`
95 | if [ $? -eq 0 ] ; then
96 | if [ "$MAX_FD" = "maximum" -o "$MAX_FD" = "max" ] ; then
97 | MAX_FD="$MAX_FD_LIMIT"
98 | fi
99 | ulimit -n $MAX_FD
100 | if [ $? -ne 0 ] ; then
101 | warn "Could not set maximum file descriptor limit: $MAX_FD"
102 | fi
103 | else
104 | warn "Could not query maximum file descriptor limit: $MAX_FD_LIMIT"
105 | fi
106 | fi
107 |
108 | # For Darwin, add options to specify how the application appears in the dock
109 | if $darwin; then
110 | GRADLE_OPTS="$GRADLE_OPTS \"-Xdock:name=$APP_NAME\" \"-Xdock:icon=$APP_HOME/media/gradle.icns\""
111 | fi
112 |
113 | # For Cygwin, switch paths to Windows format before running java
114 | if $cygwin ; then
115 | APP_HOME=`cygpath --path --mixed "$APP_HOME"`
116 | CLASSPATH=`cygpath --path --mixed "$CLASSPATH"`
117 |
118 | # We build the pattern for arguments to be converted via cygpath
119 | ROOTDIRSRAW=`find -L / -maxdepth 1 -mindepth 1 -type d 2>/dev/null`
120 | SEP=""
121 | for dir in $ROOTDIRSRAW ; do
122 | ROOTDIRS="$ROOTDIRS$SEP$dir"
123 | SEP="|"
124 | done
125 | OURCYGPATTERN="(^($ROOTDIRS))"
126 | # Add a user-defined pattern to the cygpath arguments
127 | if [ "$GRADLE_CYGPATTERN" != "" ] ; then
128 | OURCYGPATTERN="$OURCYGPATTERN|($GRADLE_CYGPATTERN)"
129 | fi
130 | # Now convert the arguments - kludge to limit ourselves to /bin/sh
131 | i=0
132 | for arg in "$@" ; do
133 | CHECK=`echo "$arg"|egrep -c "$OURCYGPATTERN" -`
134 | CHECK2=`echo "$arg"|egrep -c "^-"` ### Determine if an option
135 |
136 | if [ $CHECK -ne 0 ] && [ $CHECK2 -eq 0 ] ; then ### Added a condition
137 | eval `echo args$i`=`cygpath --path --ignore --mixed "$arg"`
138 | else
139 | eval `echo args$i`="\"$arg\""
140 | fi
141 | i=$((i+1))
142 | done
143 | case $i in
144 | (0) set -- ;;
145 | (1) set -- "$args0" ;;
146 | (2) set -- "$args0" "$args1" ;;
147 | (3) set -- "$args0" "$args1" "$args2" ;;
148 | (4) set -- "$args0" "$args1" "$args2" "$args3" ;;
149 | (5) set -- "$args0" "$args1" "$args2" "$args3" "$args4" ;;
150 | (6) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" ;;
151 | (7) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" ;;
152 | (8) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" ;;
153 | (9) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" "$args8" ;;
154 | esac
155 | fi
156 |
157 | # Split up the JVM_OPTS And GRADLE_OPTS values into an array, following the shell quoting and substitution rules
158 | function splitJvmOpts() {
159 | JVM_OPTS=("$@")
160 | }
161 | eval splitJvmOpts $DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS
162 | JVM_OPTS[${#JVM_OPTS[*]}]="-Dorg.gradle.appname=$APP_BASE_NAME"
163 |
164 | exec "$JAVACMD" "${JVM_OPTS[@]}" -classpath "$CLASSPATH" org.gradle.wrapper.GradleWrapperMain "$@"
165 |
--------------------------------------------------------------------------------