Downgrade API 14

build.gradle

@@ -8,6 +8,12 @@ buildscript {
   }
 }
 
+allprojects {
+  repositories {
+    mavenCentral()
+  }
+}
+
 apply plugin: 'com.android.library'
 import com.android.builder.core.BuilderConstants
 

rebound-android-example/build.gradle

@@ -2,6 +2,8 @@ apply plugin: 'com.android.application'
 
 dependencies {
   compile project(':rebound-android')
+  compile 'com.android.support:appcompat-v7:22.2.0'
+  compile 'com.jakewharton:butterknife:7.0.0'
 }
 
 android {

rebound-android-example/src/main/AndroidManifest.xml

@@ -1,25 +1,25 @@
 <?xml version="1.0" encoding="utf-8"?>
-<manifest
-  xmlns:android="http://schemas.android.com/apk/res/android"
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
   package="com.facebook.rebound.example"
   android:versionCode="1"
   android:versionName="1.0">
-  <uses-sdk android:targetSdkVersion="19"
-            android:minSdkVersion="14"/>
+
   <application
     android:label="Rebound Example"
     android:hardwareAccelerated="true"
     android:allowBackup="false"
-    android:icon="@drawable/rebound_icon"
-    >
+    android:icon="@drawable/rebound_icon">
+
     <activity
       android:name="com.facebook.rebound.example.MainActivity"
-      android:theme="@android:style/Theme.DeviceDefault.NoActionBar.Fullscreen"
+      android:theme="@style/AppTheme"
       android:label="Rebound Example">
       <intent-filter>
         <action android:name="android.intent.action.MAIN"/>
         <category android:name="android.intent.category.LAUNCHER"/>
       </intent-filter>
     </activity>
+
   </application>
+
 </manifest>

rebound-android-example/src/main/java/com/facebook/rebound/example/MainActivity.java

@@ -14,10 +14,13 @@
 
 import android.app.Activity;
 import android.os.Bundle;
+import android.support.v4.view.ViewCompat;
 import android.view.MotionEvent;
 import android.view.View;
 import android.widget.FrameLayout;
 
+import butterknife.Bind;
+import butterknife.ButterKnife;
 import com.facebook.rebound.BaseSpringSystem;
 import com.facebook.rebound.SimpleSpringListener;
 import com.facebook.rebound.Spring;
@@ -36,68 +39,87 @@ public class MainActivity extends Activity {
 
   private final BaseSpringSystem mSpringSystem = SpringSystem.create();
   private final ExampleSpringListener mSpringListener = new ExampleSpringListener();
-  private FrameLayout mRootView;
+
   private Spring mScaleSpring;
-  private View mImageView;
+
+  @Bind(R.id.root_view) FrameLayout mRootView;
+  @Bind(R.id.image_view) View mImageView;
 
   @Override
   public void onCreate(Bundle savedInstanceState) {
     super.onCreate(savedInstanceState);
-
     setContentView(R.layout.main);
-    mRootView = (FrameLayout) findViewById(R.id.root_view);
-    mImageView = mRootView.findViewById(R.id.image_view);
-
-    // Create the animation spring.
-    mScaleSpring = mSpringSystem.createSpring();
-
-    // Add an OnTouchListener to the root view.
-    mRootView.setOnTouchListener(new View.OnTouchListener() {
-      @Override
-      public boolean onTouch(View v, MotionEvent event) {
-        switch (event.getAction()) {
-          case MotionEvent.ACTION_DOWN:
-            // When pressed start solving the spring to 1.
-            mScaleSpring.setEndValue(1);
-            break;
-          case MotionEvent.ACTION_UP:
-          case MotionEvent.ACTION_CANCEL:
-            // When released start solving the spring to 0.
-            mScaleSpring.setEndValue(0);
-            break;
-        }
-        return true;
-      }
-    });
+    ButterKnife.bind(this);
+    mRootView.setOnTouchListener(onTouchListener);
   }
 
-  @Override
-  public void onResume() {
+  /**
+   * Add a listener to the spring when the Activity resumes.
+   */
+  @Override public void onResume() {
     super.onResume();
-    // Add a listener to the spring when the Activity resumes.
-    mScaleSpring.addListener(mSpringListener);
+    scaleSpring().addListener(mSpringListener);
   }
 
-  @Override
-  public void onPause() {
+  /**
+   * Remove the listener to the spring when the Activity pauses.
+   */
+  @Override public void onPause() {
+    scaleSpring().removeListener(mSpringListener);
     super.onPause();
-    // Remove the listener to the spring when the Activity pauses.
-    mScaleSpring.removeListener(mSpringListener);
   }
 
+  /**
+   * Create a new instance if spring if needed
+   *
+   * @return instance of Spring
+   */
+  private Spring scaleSpring() {
+    if(mScaleSpring == null) {
+      mScaleSpring = mSpringSystem.createSpring();
+    }
+    return mScaleSpring;
+  }
+
+  /**
+   * On each update of the spring value, we adjust the scale of the image view to match the
+   * springs new value. We use the SpringUtil linear interpolation function mapValueFromRangeToRange
+   * to translate the spring's 0 to 1 scale to a 100% to 50% scale range and apply that to the View
+   * with setScaleX/Y. Note that rendering is an implementation detail of the application and not
+   * Rebound itself. If you need Gingerbread compatibility consider using ViewCompat to update
+   * your view properties in a backwards compatible manner.
+   */
   private class ExampleSpringListener extends SimpleSpringListener {
-    @Override
-    public void onSpringUpdate(Spring spring) {
-      // On each update of the spring value, we adjust the scale of the image view to match the
-      // springs new value. We use the SpringUtil linear interpolation function mapValueFromRangeToRange
-      // to translate the spring's 0 to 1 scale to a 100% to 50% scale range and apply that to the View
-      // with setScaleX/Y. Note that rendering is an implementation detail of the application and not
-      // Rebound itself. If you need Gingerbread compatibility consider using NineOldAndroids to update
-      // your view properties in a backwards compatible manner.
+    @Override public void onSpringUpdate(Spring spring) {
       float mappedValue = (float) SpringUtil.mapValueFromRangeToRange(spring.getCurrentValue(), 0, 1, 1, 0.5);
-      mImageView.setScaleX(mappedValue);
-      mImageView.setScaleY(mappedValue);
+      ViewCompat.setScaleX(mImageView, mappedValue);
+      ViewCompat.setScaleY(mImageView, mappedValue);
     }
   }
 
+  /**
+   * # MotionEvent.ACTION_DOWN:
+   * When pressed start solving the spring to 1.
+   *
+   * #MotionEvent.ACTION_UP:
+   * #MotionEvent.ACTION_CANCEL:
+   * When released start solving the spring to 0.
+   */
+  private View.OnTouchListener onTouchListener = new View.OnTouchListener() {
+    @Override public boolean onTouch(View v, MotionEvent event) {
+      switch (event.getAction()) {
+        case MotionEvent.ACTION_DOWN:
+          scaleSpring().setEndValue(1);
+          break;
+        case MotionEvent.ACTION_UP:
+        case MotionEvent.ACTION_CANCEL:
+          scaleSpring().setEndValue(0);
+          break;
+        default:
+          break;
+      }
+      return true;
+    }
+  };
+
 }

rebound-android-example/src/main/res/layout/main.xml

@@ -1,21 +1,21 @@
 <?xml version="1.0" encoding="utf-8"?>
 <FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
-             android:id="@+id/root_view"
-             android:orientation="vertical"
-             android:layout_width="fill_parent"
-             android:layout_height="fill_parent"
-  >
+ android:id="@+id/root_view"
+ android:orientation="vertical"
+ android:layout_width="match_parent"
+ android:layout_height="match_parent">
+
   <ImageView
     android:id="@+id/image_view"
     android:layout_width="match_parent"
     android:layout_height="match_parent"
     android:src="@drawable/landscape"
-    android:scaleType="centerCrop"
-    />
+    android:scaleType="centerCrop"/>
+
   <com.facebook.rebound.ui.SpringConfiguratorView
     android:id="@+id/spring_configurator"
     android:layout_width="match_parent"
     android:layout_height="wrap_content"
-    android:layout_gravity="bottom"
-    />
+    android:layout_gravity="bottom"/>
+
 </FrameLayout>

rebound-android-example/src/main/res/values/colors.xml

@@ -0,0 +1,4 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+  <color name="black">#000000</color>
+</resources>

rebound-android-example/src/main/res/values/styles.xml

@@ -0,0 +1,12 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+
+  <!-- Base application theme. -->
+  <style name="AppTheme" parent="Theme.AppCompat.NoActionBar">
+    <item name="android:windowContentOverlay">@null</item>
+    <item name="android:windowNoTitle">true</item>
+    <item name="android:windowActionBar">false</item>
+    <item name="android:windowBackground">@color/black</item>
+  </style>
+
+</resources>

rebound-android-playground/build.gradle

@@ -1,8 +1,9 @@
 apply plugin: 'com.android.application'
 
 dependencies {
-  compile fileTree(dir: 'libs', include: ['*.jar'])
   compile project(':rebound-android')
+  compile 'com.android.support:appcompat-v7:22.2.0'
+  compile 'com.jakewharton:butterknife:7.0.0'
 }
 
 android {
@@ -14,7 +15,7 @@ android {
     applicationId "com.facebook.rebound.androidplayground"
     versionCode Integer.parseInt(project.VERSION_CODE)
     versionName project.VERSION_NAME
-    minSdkVersion 19
+    minSdkVersion Integer.parseInt(project.ANDROID_MIN_SDK)
     targetSdkVersion Integer.parseInt(project.ANDROID_TARGET_SDK_VERSION)
   }
 

rebound-android-playground/src/main/AndroidManifest.xml

@@ -1,25 +1,24 @@
 <?xml version="1.0" encoding="utf-8"?>
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
     package="com.facebook.rebound.playground" >
-  <uses-sdk android:targetSdkVersion="19"
-            android:minSdkVersion="16"/>
+
     <application
         android:allowBackup="true"
         android:icon="@drawable/rebound_icon"
         android:label="@string/app_name"
         android:theme="@style/AppTheme"
-        android:hardwareAccelerated="true"
-        >
+        android:hardwareAccelerated="true">
+
         <activity
             android:name="com.facebook.rebound.playground.app.PlaygroundActivity"
-            android:theme="@android:style/Theme.Holo.NoActionBar"
             android:screenOrientation="portrait"
             android:label="@string/app_name" >
             <intent-filter>
                 <action android:name="android.intent.action.MAIN" />
                 <category android:name="android.intent.category.LAUNCHER" />
             </intent-filter>
         </activity>
+
     </application>
 
 </manifest>

rebound-android-playground/src/main/java/com/facebook/rebound/playground/app/AbstractActivity.java

@@ -0,0 +1,17 @@
+package com.facebook.rebound.playground.app;
+
+import android.os.Bundle;
+import android.support.v7.app.AppCompatActivity;
+import butterknife.ButterKnife;
+
+public abstract class AbstractActivity extends AppCompatActivity {
+
+  @Override protected void onCreate(Bundle savedInstanceState) {
+    super.onCreate(savedInstanceState);
+    setContentView(getContentViewId());
+    ButterKnife.bind(this);
+  }
+
+  protected abstract int getContentViewId();
+
+}