chapter-7 Activity切换动画 Button放大动画 Layoutanimation动画

Intent intent = new Intent(this, TestActivity.class);
startActivity(intent);
overridePendingTransition(R.anim.enter_anim, R.anim.exit_anim);

R.anim.enter_anim

<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android"
android:duration="300"
android:interpolator="@android:anim/accelerate_interpolator"
android:shareInterpolator="true" >
<alpha
android:fromAlpha="0.0"
android:toAlpha="1.0" />
<translate
android:fromYDelta="500"
android:toXDelta="0" />
</set>

<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schem
4000
as.android.com/apk/res/android"
android:duration="300"
android:interpolator="@android:anim/accelerate_interpolator"
android:shareInterpolator="true" >
<alpha
android:fromAlpha="1.0"
android:toAlpha="0" />
<translate
android:fromYDelta="0"
android:toYDelta="500" />
</set>

@Override
public void onWindowFocusChanged(boolean hasFocus) {
super.onWindowFocusChanged(hasFocus);
if (hasFocus) {
Button button = (Button)findViewById(R.id.button1);
performAnimate(button, button.getWidth(), 500);
}
}

private void performAnimate(final View target, final int start, final int end) {
ValueAnimator valueAnimator = ValueAnimator.ofInt(1, 100);
valueAnimator.addUpdateListener(new AnimatorUpdateListener() {

// 持有一个IntEvaluator对象，方便下面估值的时候使用
private IntEvaluator mEvaluator = new IntEvaluator();

@Override
public void onAnimationUpdate(ValueAnimator animator) {
// 获得当前动画的进度值，整型，1-100之间
int currentValue = (Integer) animator.getAnimatedValue();
Log.d(TAG, "current value: " + currentValue);

// 获得当前进度占整个动画过程的比例，浮点型，0-1之间
float fraction = animator.getAnimatedFraction();
// 直接调用整型估值器通过比例计算出宽度，然后再设给Button
target.getLayoutParams().width = mEvaluator.evaluate(fraction, start, end);
target.requestLayout();
}
});

valueAnimator.setDuration(5000).start();

ListView listView = (ListView) layout.findViewById(R.id.list);
Animation animation = AnimationUtils.loadAnimation(this, R.anim.anim_item);
LayoutAnimationController controller = new LayoutAnimationController(animation);
controller.setDelay(0.5f);
controller.setOrder(LayoutAnimationController.ORDER_NORMAL);
listView.setLayoutAnimation(controller);

R.anim.anim_item

<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android"
android:duration="300"
android:interpolator="@android:anim/accelerate_interpolator"
android:shareInterpolator="true" >
<alpha
android:fromAlpha="0.0"
android:toAlpha="1.0" />

<translate
android:fromXDelta="500"
android:toXDelta="0" />
</set>