├── 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
    │   │       ├── drawable
    │   │       │   └── ic_heart_24dp.xml
    │   │       ├── values
    │   │       │   ├── strings.xml
    │   │       │   ├── styles.xml
    │   │       │   └── colors.xml
    │   │       └── layout
    │   │       │   ├── include_vertical_space.xml
    │   │       │   ├── activity_main.xml
    │   │       │   └── include_hrm_counter.xml
    │   │   ├── AndroidManifest.xml
    │   │   └── java
    │   │       └── com
    │   │           └── txusballesteros
    │   │               └── demo
    │   │                   └── MainActivity.java
    ├── proguard-rules.pro
    └── build.gradle
├── snake
    ├── .gitignore
    ├── proguard-rules.pro
    ├── src
    │   └── main
    │   │   ├── AndroidManifest.xml
    │   │   ├── res
    │   │       └── values
    │   │       │   └── attrs.xml
    │   │   └── java
    │   │       └── com
    │   │           └── txusballesteros
    │   │               └── SnakeView.java
    └── build.gradle
├── release.jks
├── assets
    └── demo.gif
├── gradle.properties
├── .travis.yml
├── settings.gradle
├── .gitignore
└── README.md


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


--------------------------------------------------------------------------------
/snake/.gitignore:
--------------------------------------------------------------------------------
1 | /build
2 | 


--------------------------------------------------------------------------------
/release.jks:
--------------------------------------------------------------------------------
https://raw.githubusercontent.com/txusballesteros/snake/HEAD/release.jks


--------------------------------------------------------------------------------
/assets/demo.gif:
--------------------------------------------------------------------------------
https://raw.githubusercontent.com/txusballesteros/snake/HEAD/assets/demo.gif


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


--------------------------------------------------------------------------------
/app/src/main/res/mipmap-mdpi/ic_launcher.png:
--------------------------------------------------------------------------------
https://raw.githubusercontent.com/txusballesteros/snake/HEAD/app/src/main/res/mipmap-mdpi/ic_launcher.png


--------------------------------------------------------------------------------
/app/src/main/res/mipmap-xhdpi/ic_launcher.png:
--------------------------------------------------------------------------------
https://raw.githubusercontent.com/txusballesteros/snake/HEAD/app/src/main/res/mipmap-xhdpi/ic_launcher.png


--------------------------------------------------------------------------------
/app/src/main/res/mipmap-xxhdpi/ic_launcher.png:
--------------------------------------------------------------------------------
https://raw.githubusercontent.com/txusballesteros/snake/HEAD/app/src/main/res/mipmap-xxhdpi/ic_launcher.png


--------------------------------------------------------------------------------
/app/src/main/res/drawable/ic_heart_24dp.xml:
--------------------------------------------------------------------------------
 1 | <vector xmlns:android="http://schemas.android.com/apk/res/android"
 2 |         android:width="24dp"
 3 |         android:height="24dp"
 4 |         android:viewportWidth="24.0"
 5 |         android:viewportHeight="24.0">
 6 |     <path
 7 |         android:fillColor="#FF000000"
 8 |         android:pathData="M12,21.35l-1.45,-1.32C5.4,15.36 2,12.28 2,8.5 2,5.42 4.42,3 7.5,3c1.74,0 3.41,0.81 4.5,2.09C13.09,3.81 14.76,3 16.5,3 19.58,3 22,5.42 22,8.5c0,3.78 -3.4,6.86 -8.55,11.54L12,21.35z"/>
 9 | </vector>
10 | 


--------------------------------------------------------------------------------
/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/txus/Android/android-sdk-macosx/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 | 


--------------------------------------------------------------------------------
/snake/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/txus/Android/android-sdk-macosx/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 | 


--------------------------------------------------------------------------------
/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 | # 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


--------------------------------------------------------------------------------
/.travis.yml:
--------------------------------------------------------------------------------
 1 | sudo: required
 2 | language: android
 3 | env:
 4 |   matrix:
 5 |     - ANDROID_TARGET=android-23  ANDROID_ABI=armeabi-v7a
 6 | android:
 7 |   components:
 8 |     # The BuildTools version used by your project
 9 |     - build-tools-23.0.1
10 | 
11 |     # The SDK version used to compile your project
12 |     - $ANDROID_TARGET
13 | 
14 |     # Additional components
15 |     - extra-google-google_play_services
16 |     - extra-google-m2repository
17 |     - extra-android-m2repository
18 |     # - addon-google_apis-google-22
19 | 
20 |     # Specify at least one system image,
21 |     # if you need to run emulator(s) during your tests
22 |     # - sys-img-armeabi-v7a-android-22
23 |     # - sys-img-x86-android-17
24 | 
25 | # Emulator Management: Create, Start and Wait
26 | before_script:
27 |   # - echo no | android create avd --force -n test -t $ANDROID_TARGET --abi $ANDROID_ABI
28 |   # - emulator -avd test -no-skin -no-audio -no-window &
29 |   # - android-wait-for-emulator
30 |   # - adb shell input keyevent 82 &
31 | 
32 | script: gradle build -x lint
33 | 


--------------------------------------------------------------------------------
/settings.gradle:
--------------------------------------------------------------------------------
 1 | /*
 2 |  * Copyright Txus Ballesteros 2015 (@txusballesteros)
 3 |  *
 4 |  * This file is part of some open source application.
 5 |  *
 6 |  * Licensed to the Apache Software Foundation (ASF) under one
 7 |  * or more contributor license agreements.  See the NOTICE file
 8 |  * distributed with this work for additional information
 9 |  * regarding copyright ownership.  The ASF licenses this file
10 |  * to you under the Apache License, Version 2.0 (the
11 |  * "License"); you may not use this file except in compliance
12 |  * with the License.  You may obtain a copy of the License at
13 |  *
14 |  *   http://www.apache.org/licenses/LICENSE-2.0
15 |  *
16 |  * Unless required by applicable law or agreed to in writing,
17 |  * software distributed under the License is distributed on an
18 |  * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
19 |  * KIND, either express or implied.  See the License for the
20 |  * specific language governing permissions and limitations
21 |  * under the License.
22 |  *
23 |  * Contact: Txus Ballesteros <txus.ballesteros@gmail.com>
24 |  */
25 | include ':app', ':snake'
26 | 


--------------------------------------------------------------------------------
/snake/src/main/AndroidManifest.xml:
--------------------------------------------------------------------------------
 1 | <?xml version="1.0" encoding="utf-8"?>
 2 | <!--
 3 |  * Copyright Txus Ballesteros 2015 (@txusballesteros)
 4 |  *
 5 |  * This file is part of some open source application.
 6 |  *
 7 |  * Licensed to the Apache Software Foundation (ASF) under one
 8 |  * or more contributor license agreements.  See the NOTICE file
 9 |  * distributed with this work for additional information
10 |  * regarding copyright ownership.  The ASF licenses this file
11 |  * to you under the Apache License, Version 2.0 (the
12 |  * "License"); you may not use this file except in compliance
13 |  * with the License.  You may obtain a copy of the License at
14 |  *
15 |  *   http://www.apache.org/licenses/LICENSE-2.0
16 |  *
17 |  * Unless required by applicable law or agreed to in writing,
18 |  * software distributed under the License is distributed on an
19 |  * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
20 |  * KIND, either express or implied.  See the License for the
21 |  * specific language governing permissions and limitations
22 |  * under the License.
23 |  *
24 |  * Contact: Txus Ballesteros <txus.ballesteros@gmail.com>
25 | -->
26 | <manifest package="com.txusballesteros" />
27 | 


--------------------------------------------------------------------------------
/app/src/main/res/values/strings.xml:
--------------------------------------------------------------------------------
 1 | <?xml version="1.0" encoding="utf-8"?>
 2 | <!--
 3 |  * Copyright Txus Ballesteros 2015 (@txusballesteros)
 4 |  *
 5 |  * This file is part of some open source application.
 6 |  *
 7 |  * Licensed to the Apache Software Foundation (ASF) under one
 8 |  * or more contributor license agreements.  See the NOTICE file
 9 |  * distributed with this work for additional information
10 |  * regarding copyright ownership.  The ASF licenses this file
11 |  * to you under the Apache License, Version 2.0 (the
12 |  * "License"); you may not use this file except in compliance
13 |  * with the License.  You may obtain a copy of the License at
14 |  *
15 |  *   http://www.apache.org/licenses/LICENSE-2.0
16 |  *
17 |  * Unless required by applicable law or agreed to in writing,
18 |  * software distributed under the License is distributed on an
19 |  * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
20 |  * KIND, either express or implied.  See the License for the
21 |  * specific language governing permissions and limitations
22 |  * under the License.
23 |  *
24 |  * Contact: Txus Ballesteros <txus.ballesteros@gmail.com>
25 | -->
26 | <resources>
27 |     <string name="app_name">Snake</string>
28 | </resources>
29 | 


--------------------------------------------------------------------------------
/app/src/main/res/values/styles.xml:
--------------------------------------------------------------------------------
 1 | <?xml version="1.0" encoding="utf-8"?>
 2 | <!--
 3 |  * Copyright Txus Ballesteros 2015 (@txusballesteros)
 4 |  *
 5 |  * This file is part of some open source application.
 6 |  *
 7 |  * Licensed to the Apache Software Foundation (ASF) under one
 8 |  * or more contributor license agreements.  See the NOTICE file
 9 |  * distributed with this work for additional information
10 |  * regarding copyright ownership.  The ASF licenses this file
11 |  * to you under the Apache License, Version 2.0 (the
12 |  * "License"); you may not use this file except in compliance
13 |  * with the License.  You may obtain a copy of the License at
14 |  *
15 |  *   http://www.apache.org/licenses/LICENSE-2.0
16 |  *
17 |  * Unless required by applicable law or agreed to in writing,
18 |  * software distributed under the License is distributed on an
19 |  * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
20 |  * KIND, either express or implied.  See the License for the
21 |  * specific language governing permissions and limitations
22 |  * under the License.
23 |  *
24 |  * Contact: Txus Ballesteros <txus.ballesteros@gmail.com>
25 | -->
26 | <resources>
27 |     <style name="AppTheme" parent="Theme.AppCompat.Light.DarkActionBar" />
28 | </resources>
29 | 


--------------------------------------------------------------------------------
/app/src/main/res/values/colors.xml:
--------------------------------------------------------------------------------
 1 | <?xml version="1.0" encoding="utf-8"?>
 2 | <!--
 3 |  * Copyright Txus Ballesteros 2015 (@txusballesteros)
 4 |  *
 5 |  * This file is part of some open source application.
 6 |  *
 7 |  * Licensed to the Apache Software Foundation (ASF) under one
 8 |  * or more contributor license agreements.  See the NOTICE file
 9 |  * distributed with this work for additional information
10 |  * regarding copyright ownership.  The ASF licenses this file
11 |  * to you under the Apache License, Version 2.0 (the
12 |  * "License"); you may not use this file except in compliance
13 |  * with the License.  You may obtain a copy of the License at
14 |  *
15 |  *   http://www.apache.org/licenses/LICENSE-2.0
16 |  *
17 |  * Unless required by applicable law or agreed to in writing,
18 |  * software distributed under the License is distributed on an
19 |  * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
20 |  * KIND, either express or implied.  See the License for the
21 |  * specific language governing permissions and limitations
22 |  * under the License.
23 |  *
24 |  * Contact: Txus Ballesteros <txus.ballesteros@gmail.com>
25 | -->
26 | <resources>
27 |     <color name="brand">#ffbf080B</color>
28 |     <color name="brand_fill">#80bf080B</color>
29 | </resources>


--------------------------------------------------------------------------------
/app/src/main/res/layout/include_vertical_space.xml:
--------------------------------------------------------------------------------
 1 | <?xml version="1.0" encoding="utf-8"?>
 2 | <!--
 3 |  * Copyright Txus Ballesteros 2015 (@txusballesteros)
 4 |  *
 5 |  * This file is part of some open source application.
 6 |  *
 7 |  * Licensed to the Apache Software Foundation (ASF) under one
 8 |  * or more contributor license agreements.  See the NOTICE file
 9 |  * distributed with this work for additional information
10 |  * regarding copyright ownership.  The ASF licenses this file
11 |  * to you under the Apache License, Version 2.0 (the
12 |  * "License"); you may not use this file except in compliance
13 |  * with the License.  You may obtain a copy of the License at
14 |  *
15 |  *   http://www.apache.org/licenses/LICENSE-2.0
16 |  *
17 |  * Unless required by applicable law or agreed to in writing,
18 |  * software distributed under the License is distributed on an
19 |  * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
20 |  * KIND, either express or implied.  See the License for the
21 |  * specific language governing permissions and limitations
22 |  * under the License.
23 |  *
24 |  * Contact: Txus Ballesteros <txus.ballesteros@gmail.com>
25 | -->
26 | <merge xmlns:android="http://schemas.android.com/apk/res/android">
27 | 
28 |     <Space
29 |         android:layout_width="match_parent"
30 |         android:layout_height="50dp" />
31 | 
32 | </merge>


--------------------------------------------------------------------------------
/.gitignore:
--------------------------------------------------------------------------------
 1 | # Copyright: Benjamin Weiss (keyboardsurfer) https://github.com/keyboardsurfer
 2 | # Under CC-BY-SA V3.0 (https://creativecommons.org/licenses/by-sa/3.0/legalcode)
 3 |  
 4 | # built application files
 5 | *.apk
 6 | *.ap_
 7 |  
 8 | # lint folder
 9 | lint
10 |  
11 | # files for the dex VM
12 | *.dex
13 |  
14 | # Java class files
15 | *.class
16 |  
17 | # generated files
18 | bin/
19 | gen/
20 | classes/
21 | gen-external-apklibs/
22 |  
23 | # maven output folder
24 | target
25 |  
26 | # Local configuration file (sdk path, etc)
27 | local.properties
28 |  
29 | # Eclipse project files
30 | .classpath
31 | .project
32 | .metadata
33 | .settings
34 |  
35 | # IntelliJ files
36 | .idea
37 | *.iml
38 |  
39 | # OSX files
40 | .DS_Store
41 |  
42 | # Windows files
43 | Thumbs.db
44 |  
45 | # vi swap files
46 | *.swp
47 |  
48 | # backup files
49 | *.bak
50 |  
51 | # gradle directory
52 | .gradle
53 | gradlew
54 | gradlew.bat
55 | gradle/
56 | build/
57 | captures/
58 |  
59 | #for oh-my-zsh jira plugin (https://github.com/robbyrussell/oh-my-zsh/wiki/Plugins#jira)
60 | .jira-url
61 | atlassian-ide-plugin.xml
62 | 
63 | # Custom: deploy for BB Playbook and device-info files
64 | device-pass.novcs
65 | device-ip.novcs
66 | bar-deploy.sh
67 | 
68 | # Hidden Mac OS files
69 | .DS_Store
70 | 
71 | HockeySDK.jar.properties
72 | ant.properties
73 | proguard
74 | 
75 | *.jar.properties
76 | 
77 | /local.properties
78 | 
79 | /AndroidManifest.xml.bak
80 | 
81 | /local.properties
82 | 
83 | /AndroidManifest.xml.bak
84 | 
85 | # newrelic
86 | .nrwork
87 | 
88 | keystore
89 | 


--------------------------------------------------------------------------------
/app/build.gradle:
--------------------------------------------------------------------------------
 1 | /*
 2 |  * Copyright Txus Ballesteros 2015 (@txusballesteros)
 3 |  *
 4 |  * This file is part of some open source application.
 5 |  *
 6 |  * Licensed to the Apache Software Foundation (ASF) under one
 7 |  * or more contributor license agreements.  See the NOTICE file
 8 |  * distributed with this work for additional information
 9 |  * regarding copyright ownership.  The ASF licenses this file
10 |  * to you under the Apache License, Version 2.0 (the
11 |  * "License"); you may not use this file except in compliance
12 |  * with the License.  You may obtain a copy of the License at
13 |  *
14 |  *   http://www.apache.org/licenses/LICENSE-2.0
15 |  *
16 |  * Unless required by applicable law or agreed to in writing,
17 |  * software distributed under the License is distributed on an
18 |  * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
19 |  * KIND, either express or implied.  See the License for the
20 |  * specific language governing permissions and limitations
21 |  * under the License.
22 |  *
23 |  * Contact: Txus Ballesteros <txus.ballesteros@gmail.com>
24 |  */
25 | apply plugin: 'com.android.application'
26 | 
27 | android {
28 |     compileSdkVersion 23
29 |     buildToolsVersion "23.0.2"
30 | 
31 |     defaultConfig {
32 |         applicationId "com.txusballesteros.demo"
33 |         minSdkVersion 14
34 |         targetSdkVersion 23
35 |         versionCode 2
36 |         versionName "1.1.0"
37 |     }
38 |     buildTypes {
39 |         release {
40 |             minifyEnabled false
41 |             proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
42 |         }
43 |     }
44 | }
45 | 
46 | dependencies {
47 |     compile project(':snake')
48 |     compile 'com.android.support:appcompat-v7:23.1.1'
49 | }
50 | 


--------------------------------------------------------------------------------
/app/src/main/AndroidManifest.xml:
--------------------------------------------------------------------------------
 1 | <?xml version="1.0" encoding="utf-8"?>
 2 | <!--
 3 |  * Copyright Txus Ballesteros 2015 (@txusballesteros)
 4 |  *
 5 |  * This file is part of some open source application.
 6 |  *
 7 |  * Licensed to the Apache Software Foundation (ASF) under one
 8 |  * or more contributor license agreements.  See the NOTICE file
 9 |  * distributed with this work for additional information
10 |  * regarding copyright ownership.  The ASF licenses this file
11 |  * to you under the Apache License, Version 2.0 (the
12 |  * "License"); you may not use this file except in compliance
13 |  * with the License.  You may obtain a copy of the License at
14 |  *
15 |  *   http://www.apache.org/licenses/LICENSE-2.0
16 |  *
17 |  * Unless required by applicable law or agreed to in writing,
18 |  * software distributed under the License is distributed on an
19 |  * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
20 |  * KIND, either express or implied.  See the License for the
21 |  * specific language governing permissions and limitations
22 |  * under the License.
23 |  *
24 |  * Contact: Txus Ballesteros <txus.ballesteros@gmail.com>
25 | -->
26 | <manifest xmlns:android="http://schemas.android.com/apk/res/android"
27 |     package="com.txusballesteros.demo" >
28 | 
29 |     <application
30 |         android:allowBackup="false"
31 |         android:icon="@mipmap/ic_launcher"
32 |         android:label="@string/app_name"
33 |         android:theme="@style/AppTheme" >
34 |         <activity
35 |             android:name=".MainActivity"
36 |             android:label="@string/app_name"
37 |             android:theme="@style/AppTheme" >
38 |             <intent-filter>
39 |                 <action android:name="android.intent.action.MAIN" />
40 |                 <category android:name="android.intent.category.LAUNCHER" />
41 |             </intent-filter>
42 |         </activity>
43 |     </application>
44 | </manifest>
45 | 


--------------------------------------------------------------------------------
/snake/src/main/res/values/attrs.xml:
--------------------------------------------------------------------------------
 1 | <?xml version="1.0" encoding="utf-8"?>
 2 | <!--
 3 |  * Copyright Txus Ballesteros 2015 (@txusballesteros)
 4 |  *
 5 |  * This file is part of some open source application.
 6 |  *
 7 |  * Licensed to the Apache Software Foundation (ASF) under one
 8 |  * or more contributor license agreements.  See the NOTICE file
 9 |  * distributed with this work for additional information
10 |  * regarding copyright ownership.  The ASF licenses this file
11 |  * to you under the Apache License, Version 2.0 (the
12 |  * "License"); you may not use this file except in compliance
13 |  * with the License.  You may obtain a copy of the License at
14 |  *
15 |  *   http://www.apache.org/licenses/LICENSE-2.0
16 |  *
17 |  * Unless required by applicable law or agreed to in writing,
18 |  * software distributed under the License is distributed on an
19 |  * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
20 |  * KIND, either express or implied.  See the License for the
21 |  * specific language governing permissions and limitations
22 |  * under the License.
23 |  *
24 |  * Contact: Txus Ballesteros <txus.ballesteros@gmail.com>
25 | -->
26 | <resources>
27 |     <declare-styleable name="SnakeView">
28 |         <attr name="strokeColor" format="color" />
29 |         <attr name="fillColor" format="color" />
30 |         <attr name="strokeWidth" format="dimension" />
31 |         <attr name="minValue" format="float" />
32 |         <attr name="maxValue" format="float" />
33 |         <attr name="maximumNumberOfValues" format="integer" />
34 |         <attr name="animationDuration" format="integer" />
35 |         <attr name="scaleMode">
36 |             <enum name="fixed" value="0" />
37 |             <enum name="auto" value="1" />
38 |         </attr>
39 |         <attr name="chartStyle">
40 |             <enum name="stroke" value="0" />
41 |             <enum name="fill" value="1" />
42 |             <enum name="fill_stroke" value="2" />
43 |         </attr>
44 |     </declare-styleable>
45 | </resources>


--------------------------------------------------------------------------------
/app/src/main/res/layout/activity_main.xml:
--------------------------------------------------------------------------------
 1 | <?xml version="1.0" encoding="utf-8"?>
 2 | <!--
 3 |  * Copyright Txus Ballesteros 2015 (@txusballesteros)
 4 |  *
 5 |  * This file is part of some open source application.
 6 |  *
 7 |  * Licensed to the Apache Software Foundation (ASF) under one
 8 |  * or more contributor license agreements.  See the NOTICE file
 9 |  * distributed with this work for additional information
10 |  * regarding copyright ownership.  The ASF licenses this file
11 |  * to you under the Apache License, Version 2.0 (the
12 |  * "License"); you may not use this file except in compliance
13 |  * with the License.  You may obtain a copy of the License at
14 |  *
15 |  *   http://www.apache.org/licenses/LICENSE-2.0
16 |  *
17 |  * Unless required by applicable law or agreed to in writing,
18 |  * software distributed under the License is distributed on an
19 |  * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
20 |  * KIND, either express or implied.  See the License for the
21 |  * specific language governing permissions and limitations
22 |  * under the License.
23 |  *
24 |  * Contact: Txus Ballesteros <txus.ballesteros@gmail.com>
25 | -->
26 | <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
27 |     android:layout_width="match_parent"
28 |     android:layout_height="match_parent"
29 |     xmlns:app="http://schemas.android.com/apk/res-auto"
30 |     android:orientation="vertical"
31 |     android:gravity="center"
32 |     android:background="#ffffff">
33 | 
34 |     <include layout="@layout/include_hrm_counter" />
35 | 
36 |     <include layout="@layout/include_vertical_space" />
37 | 
38 |     <com.txusballesteros.SnakeView
39 |         android:id="@+id/snake"
40 |         android:layout_gravity="center"
41 |         android:layout_width="match_parent"
42 |         android:paddingLeft="4dp"
43 |         android:paddingRight="4dp"
44 |         android:layout_height="100dp"
45 |         app:minValue="50"
46 |         app:maxValue="180"
47 |         app:maximumNumberOfValues="10"
48 |         app:scaleMode="auto"
49 |         app:chartStyle="fill_stroke"
50 |         app:strokeWidth="2dp"
51 |         app:strokeColor="@color/brand"
52 |         app:fillColor="@color/brand_fill"/>
53 | 
54 | </LinearLayout>


--------------------------------------------------------------------------------
/app/src/main/res/layout/include_hrm_counter.xml:
--------------------------------------------------------------------------------
 1 | <?xml version="1.0" encoding="utf-8"?>
 2 | <!--
 3 |  * Copyright Txus Ballesteros 2015 (@txusballesteros)
 4 |  *
 5 |  * This file is part of some open source application.
 6 |  *
 7 |  * Licensed to the Apache Software Foundation (ASF) under one
 8 |  * or more contributor license agreements.  See the NOTICE file
 9 |  * distributed with this work for additional information
10 |  * regarding copyright ownership.  The ASF licenses this file
11 |  * to you under the Apache License, Version 2.0 (the
12 |  * "License"); you may not use this file except in compliance
13 |  * with the License.  You may obtain a copy of the License at
14 |  *
15 |  *   http://www.apache.org/licenses/LICENSE-2.0
16 |  *
17 |  * Unless required by applicable law or agreed to in writing,
18 |  * software distributed under the License is distributed on an
19 |  * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
20 |  * KIND, either express or implied.  See the License for the
21 |  * specific language governing permissions and limitations
22 |  * under the License.
23 |  *
24 |  * Contact: Txus Ballesteros <txus.ballesteros@gmail.com>
25 | -->
26 | <LinearLayout
27 |     xmlns:android="http://schemas.android.com/apk/res/android"
28 |     android:layout_width="wrap_content"
29 |     android:layout_height="wrap_content"
30 |     android:orientation="horizontal"
31 |     android:gravity="center">
32 | 
33 |     <TextView
34 |         android:id="@+id/text"
35 |         android:layout_width="wrap_content"
36 |         android:layout_height="wrap_content"
37 |         android:textSize="60sp"
38 |         android:text="100" />
39 | 
40 |     <Space
41 |         android:layout_width="8dp"
42 |         android:layout_height="wrap_content" />
43 | 
44 |     <LinearLayout
45 |         android:layout_width="wrap_content"
46 |         android:layout_height="wrap_content"
47 |         android:orientation="vertical">
48 | 
49 |         <ImageView
50 |             android:layout_width="wrap_content"
51 |             android:layout_height="wrap_content"
52 |             android:tint="@color/brand"
53 |             android:src="@drawable/ic_heart_24dp" />
54 | 
55 |         <TextView
56 |             android:layout_width="wrap_content"
57 |             android:layout_height="wrap_content"
58 |             android:textSize="20sp"
59 |             android:text="bpm" />
60 |     </LinearLayout>
61 | </LinearLayout>


--------------------------------------------------------------------------------
/README.md:
--------------------------------------------------------------------------------
 1 | Snake View
 2 | =====================
 3 | 
 4 | ![](assets/demo.gif)
 5 | 
 6 | Snake library is a simple and animation line chart for Android.
 7 | 
 8 | ## Latest Version
 9 | 
10 | [ ![Download](https://api.bintray.com/packages/txusballesteros/maven/Snake/images/download.svg) ](https://bintray.com/txusballesteros/maven/Snake/_latestVersion) ![](https://img.shields.io/badge/platform-android-green.svg) [![Android Arsenal](https://img.shields.io/badge/Android%20Arsenal-Snake-green.svg?style=flat)](https://android-arsenal.com/details/1/2675)
11 | 
12 | ## How to use
13 | 
14 | ### Configuring your project dependencies
15 | 
16 | Add the library dependency to your build.gradle file.
17 | 
18 | ```groovy
19 | dependencies {
20 |     ...
21 |     compile 'com.txusballesteros:snake:1.0'
22 | }
23 | ```
24 | 
25 | ### Adding the view to your layout
26 | 
27 | Add the view to your xml layout file.
28 | 
29 | ```xml
30 | <com.txusballesteros.SnakeView
31 |         android:id="@+id/snake"
32 |         android:layout_width="match_parent"
33 |         android:layout_height="100dp" />
34 | ```
35 | 
36 | ### Setting the values
37 | 
38 | Setting the minimum and maximum values of the scale of the chart.
39 | 
40 | ```java
41 | final SnakeView snakeView = (SnakeView)findViewById(R.id.snake);
42 |                 snakeView.setMinValue(0);
43 |                 snakeView.setMaxValue(100);
44 | ```
45 | 
46 | Adding values to the chart.
47 | 
48 | ```java
49 | final SnakeView snakeView = (SnakeView)findViewById(R.id.snake);
50 |                 snakeView.addValue(100);
51 | ```
52 | 
53 | ## License
54 | 
55 | Copyright Txus Ballesteros 2015 (@txusballesteros)
56 | 
57 | This file is part of some open source application.
58 | 
59 | Licensed to the Apache Software Foundation (ASF) under one
60 | or more contributor license agreements.  See the NOTICE file
61 | distributed with this work for additional information
62 | regarding copyright ownership.  The ASF licenses this file
63 | to you under the Apache License, Version 2.0 (the
64 | "License"); you may not use this file except in compliance
65 | with the License.  You may obtain a copy of the License at
66 | 
67 |   http://www.apache.org/licenses/LICENSE-2.0
68 | 
69 | Unless required by applicable law or agreed to in writing,
70 | software distributed under the License is distributed on an
71 | "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
72 | KIND, either express or implied.  See the License for the
73 | specific language governing permissions and limitations
74 | under the License.
75 | 
76 | Contact: Txus Ballesteros <txus.ballesteros@gmail.com>


--------------------------------------------------------------------------------
/app/src/main/java/com/txusballesteros/demo/MainActivity.java:
--------------------------------------------------------------------------------
 1 | /*
 2 |  * Copyright Txus Ballesteros 2015 (@txusballesteros)
 3 |  *
 4 |  * This file is part of some open source application.
 5 |  *
 6 |  * Licensed to the Apache Software Foundation (ASF) under one
 7 |  * or more contributor license agreements.  See the NOTICE file
 8 |  * distributed with this work for additional information
 9 |  * regarding copyright ownership.  The ASF licenses this file
10 |  * to you under the Apache License, Version 2.0 (the
11 |  * "License"); you may not use this file except in compliance
12 |  * with the License.  You may obtain a copy of the License at
13 |  *
14 |  *   http://www.apache.org/licenses/LICENSE-2.0
15 |  *
16 |  * Unless required by applicable law or agreed to in writing,
17 |  * software distributed under the License is distributed on an
18 |  * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
19 |  * KIND, either express or implied.  See the License for the
20 |  * specific language governing permissions and limitations
21 |  * under the License.
22 |  *
23 |  * Contact: Txus Ballesteros <txus.ballesteros@gmail.com>
24 |  */
25 | package com.txusballesteros.demo;
26 | 
27 | import android.os.Bundle;
28 | import android.os.Handler;
29 | import android.support.v7.app.AppCompatActivity;
30 | import android.widget.TextView;
31 | 
32 | import com.txusballesteros.SnakeView;
33 | 
34 | public class MainActivity extends AppCompatActivity {
35 |     private float[] values = new float[] { 60, 70, 80, 90, 100,
36 |                                           150, 150, 160, 170, 175, 180,
37 |                                           170, 140, 130, 110, 90, 80, 60};
38 |     private TextView text;
39 |     private SnakeView snakeView;
40 |     private int position = 0;
41 |     private boolean stop = false;
42 | 
43 |     @Override
44 |     protected void onCreate(Bundle savedInstanceState) {
45 |         super.onCreate(savedInstanceState);
46 |         setContentView(R.layout.activity_main);
47 |         getWindow().setBackgroundDrawable(null);
48 |         text = (TextView)findViewById(R.id.text);
49 |         snakeView = (SnakeView)findViewById(R.id.snake);
50 |     }
51 | 
52 |     @Override
53 |     protected void onStart() {
54 |         super.onStart();
55 |         stop = false;
56 |         generateValue();
57 |     }
58 | 
59 |     @Override
60 |     protected void onStop() {
61 |         super.onStop();
62 |         stop = true;
63 |     }
64 | 
65 |     private void generateValue() {
66 |         if (position < (values.length - 1)) {
67 |             position++;
68 |         } else {
69 |             position = 0;
70 |         }
71 |         float value = values[position];
72 |         snakeView.addValue(value);
73 |         text.setText(Integer.toString((int)value));
74 |         new Handler().postDelayed(new Runnable() {
75 |             @Override
76 |             public void run() {
77 |                 if (!stop) {
78 |                     generateValue();
79 |                 }
80 |             }
81 |         }, 500);
82 |     }
83 | }
84 | 


--------------------------------------------------------------------------------
/snake/build.gradle:
--------------------------------------------------------------------------------
  1 | /*
  2 |  * Copyright Txus Ballesteros 2015 (@txusballesteros)
  3 |  *
  4 |  * This file is part of some open source application.
  5 |  *
  6 |  * Licensed to the Apache Software Foundation (ASF) under one
  7 |  * or more contributor license agreements.  See the NOTICE file
  8 |  * distributed with this work for additional information
  9 |  * regarding copyright ownership.  The ASF licenses this file
 10 |  * to you under the Apache License, Version 2.0 (the
 11 |  * "License"); you may not use this file except in compliance
 12 |  * with the License.  You may obtain a copy of the License at
 13 |  *
 14 |  *   http://www.apache.org/licenses/LICENSE-2.0
 15 |  *
 16 |  * Unless required by applicable law or agreed to in writing,
 17 |  * software distributed under the License is distributed on an
 18 |  * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 19 |  * KIND, either express or implied.  See the License for the
 20 |  * specific language governing permissions and limitations
 21 |  * under the License.
 22 |  *
 23 |  * Contact: Txus Ballesteros <txus.ballesteros@gmail.com>
 24 |  */
 25 | apply plugin: 'com.android.library'
 26 | apply plugin: 'com.jfrog.bintray'
 27 | apply plugin: 'com.github.dcendents.android-maven'
 28 | 
 29 | android {
 30 |     compileSdkVersion 23
 31 |     buildToolsVersion "23.0.1"
 32 | 
 33 |     defaultConfig {
 34 |         minSdkVersion 14
 35 |         targetSdkVersion 23
 36 |         versionCode 1
 37 |         versionName "1.0"
 38 |     }
 39 | 
 40 |     buildTypes {
 41 |         release {
 42 |             minifyEnabled false
 43 |             proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
 44 |         }
 45 |     }
 46 | }
 47 | 
 48 | version = parent.ext.libraryVersion
 49 | group = parent.ext.mavenGroupId
 50 | def siteUrl = parent.ext.siteUrl
 51 | def gitUrl = parent.ext.gitUrl
 52 | 
 53 | Properties properties = new Properties()
 54 | properties.load(project.rootProject.file('local.properties').newDataInputStream())
 55 | 
 56 | bintray {
 57 |     user = properties.getProperty("bintray.user")
 58 |     key = properties.getProperty("bintray.apikey")
 59 |     configurations = ['archives']
 60 |     pkg {
 61 |         repo = "maven"
 62 |         name = "Snake"
 63 |         websiteUrl = siteUrl
 64 |         vcsUrl = gitUrl
 65 |         licenses = ["Apache-2.0"]
 66 |         publish = true
 67 |     }
 68 | }
 69 | 
 70 | install {
 71 |     repositories.mavenInstaller {
 72 |         pom {
 73 |             project {
 74 |                 packaging 'aar'
 75 |                 name 'Snake'
 76 |                 url siteUrl
 77 |                 licenses {
 78 |                     license {
 79 |                         name 'The Apache Software License, Version 2.0'
 80 |                         url 'http://www.apache.org/licenses/LICENSE-2.0.txt'
 81 |                     }
 82 |                 }
 83 |                 developers {
 84 |                     developer {
 85 |                         id 'txusballesteros'
 86 |                         name 'Txus Ballesteros'
 87 |                         email 'txus.ballesteros@gmail.com'
 88 |                     }
 89 |                 }
 90 |                 scm {
 91 |                     connection gitUrl
 92 |                     developerConnection gitUrl
 93 |                     url siteUrl
 94 |                 }
 95 |             }
 96 |         }
 97 |     }
 98 | }
 99 | 
100 | task sourcesJar(type: Jar) {
101 |     from android.sourceSets.main.java.srcDirs
102 |     classifier = 'sources'
103 | }
104 | 
105 | task javadoc(type: Javadoc) {
106 |     source = android.sourceSets.main.java.srcDirs
107 |     classpath += project.files(android.getBootClasspath().join(File.pathSeparator))
108 | }
109 | 
110 | task javadocJar(type: Jar, dependsOn: javadoc) {
111 |     classifier = 'javadoc'
112 |     from javadoc.destinationDir
113 | }
114 | 
115 | artifacts {
116 |     archives javadocJar
117 |     archives sourcesJar
118 | }


--------------------------------------------------------------------------------
/snake/src/main/java/com/txusballesteros/SnakeView.java:
--------------------------------------------------------------------------------
  1 | /*
  2 |  * Copyright Txus Ballesteros 2015 (@txusballesteros)
  3 |  *
  4 |  * This file is part of some open source application.
  5 |  *
  6 |  * Licensed to the Apache Software Foundation (ASF) under one
  7 |  * or more contributor license agreements.  See the NOTICE file
  8 |  * distributed with this work for additional information
  9 |  * regarding copyright ownership.  The ASF licenses this file
 10 |  * to you under the Apache License, Version 2.0 (the
 11 |  * "License"); you may not use this file except in compliance
 12 |  * with the License.  You may obtain a copy of the License at
 13 |  *
 14 |  *   http://www.apache.org/licenses/LICENSE-2.0
 15 |  *
 16 |  * Unless required by applicable law or agreed to in writing,
 17 |  * software distributed under the License is distributed on an
 18 |  * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 19 |  * KIND, either express or implied.  See the License for the
 20 |  * specific language governing permissions and limitations
 21 |  * under the License.
 22 |  *
 23 |  * Contact: Txus Ballesteros <txus.ballesteros@gmail.com>
 24 |  */
 25 | package com.txusballesteros;
 26 | 
 27 | import android.animation.ValueAnimator;
 28 | import android.annotation.TargetApi;
 29 | import android.content.Context;
 30 | import android.content.res.TypedArray;
 31 | import android.graphics.Canvas;
 32 | import android.graphics.Paint;
 33 | import android.graphics.Path;
 34 | import android.graphics.RectF;
 35 | import android.util.AttributeSet;
 36 | import android.util.TypedValue;
 37 | import android.view.View;
 38 | import android.view.animation.LinearInterpolator;
 39 | 
 40 | import java.util.ArrayList;
 41 | import java.util.List;
 42 | import java.util.Queue;
 43 | import java.util.concurrent.ConcurrentLinkedQueue;
 44 | 
 45 | public class SnakeView extends View {
 46 |     private final static int DEFAULT_MAXIMUM_NUMBER_OF_VALUES_FOR_DESIGNER = 3;
 47 |     private final static int DEFAULT_MAXIMUM_NUMBER_OF_VALUES_FOR_RUNTIME = 10;
 48 |     private final static int DEFAULT_STROKE_COLOR = 0xff78c257;
 49 |     private final static int DEFAULT_FILL_COLOR = 0x8078c257;
 50 |     private final static int DEFAULT_STROKE_WIDTH_IN_DP = 3;
 51 |     public static final int DEFAULT_ANIMATION_DURATION = 200;
 52 |     public static final float BEZIER_FINE_FIT = 0.5f;
 53 |     public static final int DEF_STYLE_ATTR = 0;
 54 |     public static final int DEF_STYLE_RES = 0;
 55 |     public static final float DEFAULT_MIN_VALUE = 0f;
 56 |     public static final float DEFAULT_MAX_VALUE = 1f;
 57 |     public static final int MINIMUM_NUMBER_OF_VALUES = 3;
 58 |     public static final int SCALE_MODE_FIXED = 0;
 59 |     public static final int SCALE_MODE_AUTO = 1;
 60 |     public static final int CHART_STILE_STROKE = 0;
 61 |     public static final int CHART_STILE_FILL = 1;
 62 |     public static final int CHART_STILE_FILL_STROKE = 2;
 63 |     private int maximumNumberOfValues = DEFAULT_MAXIMUM_NUMBER_OF_VALUES_FOR_RUNTIME;
 64 |     private int strokeColor = DEFAULT_STROKE_COLOR;
 65 |     private int strokeWidthInPx = (int)dp2px(DEFAULT_STROKE_WIDTH_IN_DP);
 66 |     private int fillColor = DEFAULT_FILL_COLOR;
 67 |     private RectF drawingArea;
 68 |     private Paint paint;
 69 |     private Paint fillPaint;
 70 |     private Queue<Float> valuesCache;
 71 |     private List<Float> previousValuesCache;
 72 |     private List<Float> currentValuesCache;
 73 |     private int animationDuration = DEFAULT_ANIMATION_DURATION;
 74 |     private float animationProgress = 1.0f;
 75 |     private float scaleInX = 0f;
 76 |     private float scaleInY = 0f;
 77 |     private float minValue = DEFAULT_MIN_VALUE;
 78 |     private float maxValue = DEFAULT_MAX_VALUE;
 79 |     private int scaleMode = SCALE_MODE_FIXED;
 80 |     private int chartStyle = CHART_STILE_STROKE;
 81 | 
 82 | 
 83 |     public void setMaximumNumberOfValues(int maximumNumberOfValues) {
 84 |         if (maximumNumberOfValues < MINIMUM_NUMBER_OF_VALUES) {
 85 |             throw new IllegalArgumentException("The maximum number of values cannot be less than three.");
 86 |         }
 87 |         this.maximumNumberOfValues = maximumNumberOfValues;
 88 |         calculateScales();
 89 |         initializeCaches();
 90 |     }
 91 | 
 92 |     public void setScaleMode(int scaleMode) {
 93 |         this.scaleMode = scaleMode;
 94 |         calculateScales();
 95 |         initializeCaches();
 96 |     }
 97 | 
 98 |     public void setMinValue(float minValue) {
 99 |         this.minValue = minValue;
100 |         calculateScales();
101 |         initializeCaches();
102 |     }
103 | 
104 |     public void setMaxValue(float maxValue) {
105 |         this.maxValue = maxValue;
106 |         calculateScales();
107 |         initializeCaches();
108 |     }
109 | 
110 |     public void addValue(float value) {
111 |         if (scaleMode == SCALE_MODE_FIXED) {
112 |             if (value < minValue || value > maxValue) {
113 |                 throw new IllegalArgumentException("The value is out of min or max limits.");
114 |             }
115 |         }
116 |         previousValuesCache = cloneCache();
117 |         if (valuesCache.size() == maximumNumberOfValues) {
118 |             valuesCache.poll();
119 |         }
120 |         valuesCache.add(value);
121 |         currentValuesCache = cloneCache();
122 |         if (scaleMode == SCALE_MODE_AUTO) {
123 |             calculateScales();
124 |         }
125 |         playAnimation();
126 |     }
127 | 
128 |     public void clear() {
129 |         initializeCaches();
130 |         invalidate();
131 |     }
132 | 
133 |     public SnakeView(Context context) {
134 |         super(context);
135 |         initializeView();
136 |     }
137 | 
138 |     public SnakeView(Context context, AttributeSet attrs) {
139 |         super(context, attrs);
140 |         configureAttributes(attrs);
141 |         initializeView();
142 |     }
143 | 
144 |     public SnakeView(Context context, AttributeSet attrs, int defStyleAttr) {
145 |         super(context, attrs, defStyleAttr);
146 |         configureAttributes(attrs);
147 |         initializeView();
148 |     }
149 | 
150 |     @TargetApi(21)
151 |     public SnakeView(Context context, AttributeSet attrs, int defStyleAttr, int defStyleRes) {
152 |         super(context, attrs, defStyleAttr, defStyleRes);
153 |         configureAttributes(attrs);
154 |         initializeView();
155 |     }
156 | 
157 |     private void configureAttributes(AttributeSet attrs) {
158 |         TypedArray attributes = getContext().getTheme()
159 |                 .obtainStyledAttributes(attrs, R.styleable.SnakeView,
160 |                         DEF_STYLE_ATTR, DEF_STYLE_RES);
161 |         scaleMode = attributes.getInteger(R.styleable.SnakeView_scaleMode, scaleMode);
162 |         strokeColor = attributes.getColor(R.styleable.SnakeView_strokeColor, strokeColor);
163 |         fillColor = attributes.getColor(R.styleable.SnakeView_fillColor, fillColor);
164 |         strokeWidthInPx = attributes.getDimensionPixelSize(R.styleable.SnakeView_strokeWidth, strokeWidthInPx);
165 |         chartStyle = attributes.getInteger(R.styleable.SnakeView_chartStyle, chartStyle);
166 |         if (scaleMode == SCALE_MODE_FIXED) {
167 |             minValue = attributes.getFloat(R.styleable.SnakeView_minValue, DEFAULT_MIN_VALUE);
168 |             maxValue = attributes.getFloat(R.styleable.SnakeView_maxValue, DEFAULT_MAX_VALUE);
169 |         }
170 |         int defaultMaximumNumberOfValues = DEFAULT_MAXIMUM_NUMBER_OF_VALUES_FOR_RUNTIME;
171 |         if (isInEditMode()) {
172 |             defaultMaximumNumberOfValues = DEFAULT_MAXIMUM_NUMBER_OF_VALUES_FOR_DESIGNER;
173 |         }
174 |         maximumNumberOfValues = attributes.getInteger(R.styleable.SnakeView_maximumNumberOfValues,
175 |                 defaultMaximumNumberOfValues);
176 |         animationDuration = attributes.getInteger(R.styleable.SnakeView_animationDuration,
177 |                 DEFAULT_ANIMATION_DURATION);
178 |         if (maximumNumberOfValues < MINIMUM_NUMBER_OF_VALUES) {
179 |             throw new IllegalArgumentException("The maximum number of values cannot be less than three.");
180 |         }
181 |         attributes.recycle();
182 |     }
183 | 
184 |     private void initializeView() {
185 |         initializePaint();
186 |         initializeCaches();
187 |     }
188 | 
189 |     private void initializePaint() {
190 |         paint = new Paint();
191 |         paint.setFlags(Paint.ANTI_ALIAS_FLAG);
192 |         paint.setColor(strokeColor);
193 |         paint.setStyle(Paint.Style.STROKE);
194 |         if (chartStyle == CHART_STILE_STROKE) {
195 |             paint.setStrokeCap(Paint.Cap.ROUND);
196 |         }
197 |         paint.setStrokeWidth(strokeWidthInPx);
198 |         fillPaint = new Paint();
199 |         fillPaint.setFlags(Paint.ANTI_ALIAS_FLAG);
200 |         fillPaint.setColor(fillColor);
201 |         fillPaint.setStyle(Paint.Style.FILL);
202 |     }
203 | 
204 |     private void initializeCaches() {
205 |         if (isInEditMode()) {
206 |             initializeCacheForDesigner();
207 |         } else {
208 |             initializeCacheForRuntime();
209 |         }
210 |         previousValuesCache = cloneCache();
211 |         currentValuesCache = cloneCache();
212 |     }
213 | 
214 |     private void initializeCacheForDesigner() {
215 |         valuesCache = new ConcurrentLinkedQueue<>();
216 |         for (int counter = 0; counter < maximumNumberOfValues; counter++) {
217 |             if (counter % 2 == 0) {
218 |                 valuesCache.add(minValue);
219 |             } else {
220 |                 valuesCache.add(maxValue);
221 |             }
222 |         }
223 |     }
224 | 
225 |     private void initializeCacheForRuntime() {
226 |         valuesCache = new ConcurrentLinkedQueue<>();
227 |         for (int counter = 0; counter < maximumNumberOfValues; counter++) {
228 |             valuesCache.add(minValue);
229 |         }
230 |     }
231 | 
232 |     private List<Float> cloneCache() {
233 |         return new ArrayList<>(valuesCache);
234 |     }
235 | 
236 |     private float dp2px(float value) {
237 |         return TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, value,
238 |                                         getResources().getDisplayMetrics());
239 |     }
240 | 
241 |     @Override
242 |     protected void onSizeChanged(int width, int height, int oldWidth, int oldHeight) {
243 |         calculateDrawingArea(width, height);
244 |         calculateScales();
245 |     }
246 | 
247 |     private void calculateDrawingArea(int width, int height) {
248 |         int left = (strokeWidthInPx * 2) + getPaddingLeft();
249 |         int top = (strokeWidthInPx * 2) + getPaddingTop();
250 |         int right = width - getPaddingRight() - strokeWidthInPx;
251 |         int bottom = height - getPaddingBottom() - strokeWidthInPx;
252 |         drawingArea = new RectF(left, top, right, bottom);
253 |     }
254 | 
255 |     @Override
256 |     protected void onDraw(Canvas canvas) {
257 |         super.onDraw(canvas);
258 |         if (!valuesCache.isEmpty()) {
259 |             if (chartStyle == CHART_STILE_FILL || chartStyle == CHART_STILE_FILL_STROKE) {
260 |                 Path fillPath = buildPath(true);
261 |                 canvas.drawPath(fillPath, fillPaint);
262 |             }
263 | 
264 |             if (chartStyle == CHART_STILE_STROKE || chartStyle == CHART_STILE_FILL_STROKE) {
265 |                 Path strokePath = buildPath(false);
266 |                 canvas.drawPath(strokePath, paint);
267 |             }
268 |         }
269 |     }
270 | 
271 |     private Path buildPath(boolean forFill) {
272 |         int strokePadding = (strokeWidthInPx / 2);
273 |         Path path = new Path();
274 |         if (forFill) {
275 |             path.moveTo(drawingArea.left, drawingArea.bottom + strokePadding);
276 |         }
277 |         float previousX = drawingArea.left;
278 |         float previousY = drawingArea.bottom;
279 |         for (int index = 0; index < currentValuesCache.size(); index++) {
280 |             float previousValue = previousValuesCache.get(index);
281 |             float currentValue = currentValuesCache.get(index);
282 |             float pathValue = previousValue + ((currentValue - previousValue) * animationProgress);
283 |             float x = drawingArea.left + (scaleInX * index);
284 |             float y = drawingArea.bottom - ((pathValue - minValue) * scaleInY);
285 |             if (index == 0) {
286 |                 if (forFill) {
287 |                     path.lineTo(x, y);
288 |                 } else {
289 |                     path.moveTo(x, y);
290 |                 }
291 |             } else {
292 |                 float bezierControlX = previousX + ((x - previousX) * BEZIER_FINE_FIT);
293 |                 float controlPointX1 = bezierControlX;
294 |                 float controlPointY1 = previousY;
295 |                 float controlPointX2 = bezierControlX;
296 |                 float controlPointY2 = y;
297 |                 float endPointX = x;
298 |                 float endPointY = y;
299 |                 path.cubicTo(controlPointX1, controlPointY1,
300 |                              controlPointX2, controlPointY2,
301 |                              endPointX, endPointY);
302 |             }
303 |             previousX = x;
304 |             previousY = y;
305 |         }
306 |         if (forFill) {
307 |             path.lineTo(drawingArea.right, drawingArea.bottom + strokePadding);
308 |         }
309 |         return path;
310 |     }
311 | 
312 |     private void calculateScales() {
313 |         if (drawingArea != null) {
314 |             if (scaleMode == SCALE_MODE_AUTO) {
315 |                 for (int index = 0; index < currentValuesCache.size(); index++) {
316 |                     float previousValue = previousValuesCache.get(index);
317 |                     float currentValue = currentValuesCache.get(index);
318 |                     if (index == 0) {
319 |                         minValue = Math.min(currentValue, previousValue);
320 |                         maxValue = Math.max(currentValue, previousValue);
321 |                     } else {
322 |                         minValue = Math.min(minValue, currentValue);
323 |                         maxValue = Math.max(maxValue, currentValue);
324 |                         minValue = Math.min(minValue, previousValue);
325 |                         maxValue = Math.max(maxValue, previousValue);
326 |                     }
327 |                 }
328 |             }
329 |             scaleInX = (drawingArea.width() / (maximumNumberOfValues - 1));
330 |             scaleInY = (drawingArea.height() / (maxValue - minValue));
331 |         } else {
332 |             scaleInY = 0f;
333 |             scaleInX = 0f;
334 |         }
335 |     }
336 | 
337 |     private void playAnimation() {
338 |         ValueAnimator animator = ValueAnimator.ofFloat(0f, 1f);
339 |         animator.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() {
340 |             @Override
341 |             public void onAnimationUpdate(ValueAnimator animation) {
342 |                 SnakeView.this.animationProgress = (float)animation.getAnimatedValue();
343 |                 invalidate();
344 |             }
345 |         });
346 |         animator.setDuration(animationDuration);
347 |         animator.setInterpolator(new LinearInterpolator());
348 |         animator.start();
349 |     }
350 | }


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