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Update animation demo to use setBackgroundColor functionality on View

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Change-Id: I6811fd4a3612c9af8f09e570ee3c600570cefcb1
This commit is contained in:
Chet Haase
2010-11-03 18:22:44 -07:00
parent b76b6c5b61
commit 04281538b3
1 changed files with 12 additions and 28 deletions
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40
samples/ApiDemos/src/com/example/android/apis/animation/BouncingBalls.java
View File

@@ -30,7 +30,6 @@ import android.graphics.RadialGradient;
import android.graphics.Shader; import android.graphics.Shader;
import android.graphics.drawable.ShapeDrawable; import android.graphics.drawable.ShapeDrawable;
import android.graphics.drawable.shapes.OvalShape; import android.graphics.drawable.shapes.OvalShape;
import android.graphics.drawable.shapes.RectShape;
import android.os.Bundle; import android.os.Bundle;
import android.view.MotionEvent; import android.view.MotionEvent;
import android.view.View; import android.view.View;
@@ -51,8 +50,7 @@ public class BouncingBalls extends Activity {
container.addView(new MyAnimationView(this)); container.addView(new MyAnimationView(this));
} }
public class MyAnimationView extends View implements ValueAnimator.AnimatorUpdateListener, public class MyAnimationView extends View {
Animator.AnimatorListener {
private static final int RED = 0xffFF8080; private static final int RED = 0xffFF8080;
private static final int BLUE = 0xff8080FF; private static final int BLUE = 0xff8080FF;
@@ -65,17 +63,15 @@ public class BouncingBalls extends Activity {
public MyAnimationView(Context context) { public MyAnimationView(Context context) {
super(context); super(context);
// Create a colored background
ColorDrawable background = new ColorDrawable(RED);
setBackgroundDrawable(background);
// Animate background color // Animate background color
ValueAnimator colorAnim = ObjectAnimator.ofInt(background, "color", BLUE); // Note that setting the background color will automatically invalidate the
// view, so that the animated color, and the bouncing balls, get redisplayed on
// every frame of the animation.
ValueAnimator colorAnim = ObjectAnimator.ofInt(this, "backgroundColor", RED, BLUE);
colorAnim.setDuration(3000); colorAnim.setDuration(3000);
colorAnim.setEvaluator(new RGBEvaluator()); colorAnim.setEvaluator(new RGBEvaluator());
colorAnim.setRepeatCount(ValueAnimator.INFINITE); colorAnim.setRepeatCount(ValueAnimator.INFINITE);
colorAnim.setRepeatMode(ValueAnimator.REVERSE); colorAnim.setRepeatMode(ValueAnimator.REVERSE);
colorAnim.addUpdateListener(this); // forces invalidation to get the redraw
colorAnim.start(); colorAnim.start();
} }
@@ -135,7 +131,13 @@ public class BouncingBalls extends Activity {
// Fading animation - remove the ball when the animation is done // Fading animation - remove the ball when the animation is done
ValueAnimator fadeAnim = ObjectAnimator.ofFloat(newBall, "alpha", 1f, 0f); ValueAnimator fadeAnim = ObjectAnimator.ofFloat(newBall, "alpha", 1f, 0f);
fadeAnim.setDuration(250); fadeAnim.setDuration(250);
fadeAnim.addListener(this); fadeAnim.addListener(new AnimatorListenerAdapter() {
@Override
public void onAnimationEnd(Animator animation) {
balls.remove(((ObjectAnimator)animation).getTarget());
}
});
// Sequence the two animations to play one after the other // Sequence the two animations to play one after the other
AnimatorSet animatorSet = new AnimatorSet(); AnimatorSet animatorSet = new AnimatorSet();
@@ -178,23 +180,5 @@ public class BouncingBalls extends Activity {
canvas.restore(); canvas.restore();
} }
} }
public void onAnimationUpdate(ValueAnimator animation) {
invalidate();
}
public void onAnimationCancel(Animator animation) {
}
public void onAnimationEnd(Animator animation) {
balls.remove(((ObjectAnimator)animation).getTarget());
}
public void onAnimationRepeat(Animator animation) {
}
public void onAnimationStart(Animator animation) {
}
} }
} }