Robert Heim

Hi!

Do you know the Transition3d + Rotate3dAnimation from the APIDemos?

I wondered how one could use this animation effect for finishing and starting Activities. Well, this is my solution to it.

*UPDATE 05.12.2011* Working example: ActivitySwitcher

1. Create a package com.yourapp.animation and copy the Rotate3dAnimation.java in it.
2. Next, create a new Class yourapp.animation.ActivitySwitcher and implement it like this:

   com.yourapp.animation.ActivitySwitcher.java

   package com.yourapp.animation;   import android.view.Display; import android.view.View; import android.view.WindowManager; import android.view.animation.AccelerateInterpolator; import android.view.animation.Animation;   public class ActivitySwitcher {   private final static int DURATION = 300; private final static float DEPTH = 400.0f;   /* ----------------------------------------------- */   public interface AnimationFinishedListener { /** * Called when the animation is finished. */ public void onAnimationFinished(); }   /* ----------------------------------------------- */   public static void animationIn(View container, WindowManager windowManager) { animationIn(container, windowManager, null); }   public static void animationIn(View container, WindowManager windowManager, AnimationFinishedListener listener) { apply3DRotation(90, 0, false, container, windowManager, listener); }   public static void animationOut(View container, WindowManager windowManager) { animationOut(container, windowManager, null); }   public static void animationOut(View container, WindowManager windowManager, AnimationFinishedListener listener) { apply3DRotation(0, -90, true, container, windowManager, listener); }   /* ----------------------------------------------- */   private static void apply3DRotation(float fromDegree, float toDegree, boolean reverse, View container, WindowManager windowManager, final AnimationFinishedListener listener) { Display display = windowManager.getDefaultDisplay(); final float centerX = display.getWidth() / 2.0f; final float centerY = display.getHeight() / 2.0f;   final Rotate3dAnimation a = new Rotate3dAnimation(fromDegree, toDegree, centerX, centerY, DEPTH, reverse); a.reset(); a.setDuration(DURATION); a.setFillAfter(true); a.setInterpolator(new AccelerateInterpolator()); if (listener != null) { a.setAnimationListener(new Animation.AnimationListener() { @Override public void onAnimationStart(Animation animation) { }   @Override public void onAnimationRepeat(Animation animation) { }   @Override public void onAnimationEnd(Animation animation) { listener.onAnimationFinished(); } }); } container.clearAnimation(); container.startAnimation(a); } }

   package com.yourapp.animation; import android.view.Display; import android.view.View; import android.view.WindowManager; import android.view.animation.AccelerateInterpolator; import android.view.animation.Animation; public class ActivitySwitcher { private final static int DURATION = 300; private final static float DEPTH = 400.0f; /* ----------------------------------------------- */ public interface AnimationFinishedListener { /** * Called when the animation is finished. */ public void onAnimationFinished(); } /* ----------------------------------------------- */ public static void animationIn(View container, WindowManager windowManager) { animationIn(container, windowManager, null); } public static void animationIn(View container, WindowManager windowManager, AnimationFinishedListener listener) { apply3DRotation(90, 0, false, container, windowManager, listener); } public static void animationOut(View container, WindowManager windowManager) { animationOut(container, windowManager, null); } public static void animationOut(View container, WindowManager windowManager, AnimationFinishedListener listener) { apply3DRotation(0, -90, true, container, windowManager, listener); } /* ----------------------------------------------- */ private static void apply3DRotation(float fromDegree, float toDegree, boolean reverse, View container, WindowManager windowManager, final AnimationFinishedListener listener) { Display display = windowManager.getDefaultDisplay(); final float centerX = display.getWidth() / 2.0f; final float centerY = display.getHeight() / 2.0f; final Rotate3dAnimation a = new Rotate3dAnimation(fromDegree, toDegree, centerX, centerY, DEPTH, reverse); a.reset(); a.setDuration(DURATION); a.setFillAfter(true); a.setInterpolator(new AccelerateInterpolator()); if (listener != null) { a.setAnimationListener(new Animation.AnimationListener() { @Override public void onAnimationStart(Animation animation) { } @Override public void onAnimationRepeat(Animation animation) { } @Override public void onAnimationEnd(Animation animation) { listener.onAnimationFinished(); } }); } container.clearAnimation(); container.startAnimation(a); } }

3. That’s it! Now you can use it like this:

   Activity1.java

   package com.yourapp.activity   import android.app.Activity; import android.content.Intent; import android.os.Bundle; import android.view.View; import android.widget.Button; import com.yourapp.R; import com.yourapp.animation.ActivitySwitcher;   public class Activity1 extends Activity { @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity1);   Button switchActivityBtn = (Button) findViewById(R.id.bSwitchActivity); switchActivityBtn.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { animatedStartActivity(); } }); }   @Override protected void onResume() { // animateIn this activity ActivitySwitcher.animationIn(findViewById(R.id.container), getWindowManager()); super.onResume(); }   private void animatedStartActivity() { // we only animateOut this activity here. // The new activity will animateIn from its onResume() - be sure to implement it. final Intent intent = new Intent(getApplicationContext(), Activity2.class); // disable default animation for new intent intent.addFlags(Intent.FLAG_ACTIVITY_NO_ANIMATION); ActivitySwitcher.animationOut(findViewById(R.id.container), getWindowManager(), new ActivitySwitcher.AnimationFinishedListener() { @Override public void onAnimationFinished() { startActivity(intent); } }); } }

   package com.yourapp.activity import android.app.Activity; import android.content.Intent; import android.os.Bundle; import android.view.View; import android.widget.Button; import com.yourapp.R; import com.yourapp.animation.ActivitySwitcher; public class Activity1 extends Activity { @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity1); Button switchActivityBtn = (Button) findViewById(R.id.bSwitchActivity); switchActivityBtn.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { animatedStartActivity(); } }); } @Override protected void onResume() { // animateIn this activity ActivitySwitcher.animationIn(findViewById(R.id.container), getWindowManager()); super.onResume(); } private void animatedStartActivity() { // we only animateOut this activity here. // The new activity will animateIn from its onResume() - be sure to implement it. final Intent intent = new Intent(getApplicationContext(), Activity2.class); // disable default animation for new intent intent.addFlags(Intent.FLAG_ACTIVITY_NO_ANIMATION); ActivitySwitcher.animationOut(findViewById(R.id.container), getWindowManager(), new ActivitySwitcher.AnimationFinishedListener() { @Override public void onAnimationFinished() { startActivity(intent); } }); } }

   Implement Activity2.java like Activity1.java.

   The layouts (R.layout.activity1 and R.layout.activity1) must jave a container-id like this:

   <?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:id="@+id/container" android:orientation="vertical" android:layout_width="fill_parent" android:layout_height="fill_parent"> <!-- ... --> </LinearLayout>

   <?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:id="@+id/container" android:orientation="vertical" android:layout_width="fill_parent" android:layout_height="fill_parent"> <!-- ... --> </LinearLayout>

4. If you want to animate an activity out when it is finished, you could override the finish() method:

   // ... @Override public void finish() { // we need to override this to performe the animtationOut on each // finish. ActivitySwitcher.animationOut(findViewById(R.id.container), getWindowManager(), new ActivitySwitcher.AnimationFinishedListener() { @Override public void onAnimationFinished() { Activity1.super.finish(); // disable default animation overridePendingTransition(0, 0); } }); } // ...

   // ... @Override public void finish() { // we need to override this to performe the animtationOut on each // finish. ActivitySwitcher.animationOut(findViewById(R.id.container), getWindowManager(), new ActivitySwitcher.AnimationFinishedListener() { @Override public void onAnimationFinished() { Activity1.super.finish(); // disable default animation overridePendingTransition(0, 0); } }); } // ...

That’s it! 🙂