Android 旧电视退出效果

费话不多说，直接上代码


TVOffAnimation.java

package com.iaiai.activity;

import android.graphics.Matrix;
import android.view.animation.AccelerateDecelerateInterpolator;
import android.view.animation.Animation;
import android.view.animation.Transformation;

/**
 * 
 * <p>
 * Title: TVOffAnimation.java
 * </p>
 * <p>
 * E-Mail: [e-mail]
 * </p>
 * <p>
 * QQ: 176291935
 * </p>
 * <p>
 * Http: iaiai.iteye.com
 * </p>
 * <p>
 * Create time: 2012-10-8 下午1:33:44
 * </p>
 * 
 * @author 丸子
 * @version 0.0.1
 */
public class TVOffAnimation extends Animation {

	private int halfWidth;
	private int halfHeight;

	@Override
	public void initialize(int width, int height, int parentWidth, int parentHeight) {

		super.initialize(width, height, parentWidth, parentHeight);
		setDuration(500);
		setFillAfter(true);
		// 保存View的中心点
		halfWidth = width / 2;
		halfHeight = height / 2;
		setInterpolator(new AccelerateDecelerateInterpolator());

	}

	@Override
	protected void applyTransformation(float interpolatedTime, Transformation t) {

		final Matrix matrix = t.getMatrix();
		if (interpolatedTime < 0.5) {
			matrix.preScale(1 + 0.625f * interpolatedTime, 1 - interpolatedTime / 0.8f + 0.003f, halfWidth, halfHeight);
		} else {
			matrix.preScale(7.5f * (1 - interpolatedTime), 0.003f, halfWidth, halfHeight);
		}
	}
}

MainActivity.java

package com.iaiai.activity;

import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;

/**
 * 
 * <p>
 * Title: MainActivity.java
 * </p>
 * <p>
 * E-Mail: [e-mail]
 * </p>
 * <p>
 * QQ: 176291935
 * </p>
 * <p>
 * Http: iaiai.iteye.com
 * </p>
 * <p>
 * Create time: 2012-10-8 下午1:33:44
 * </p>
 * 
 * @author 丸子
 * @version 0.0.1
 */
public class MainActivity extends Activity {
	@Override
	public void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.main);

		findViewById(R.id.btn).setOnClickListener(new OnClickListener() {
			@Override
			public void onClick(View v) {
				findViewById(R.id.root).startAnimation(new TVOffAnimation());
			}
		});
	}
}

main.xml:

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

    <TextView
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:text="@string/hello" />

    <Button
        android:id="@+id/btn"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:text="动画" />

</LinearLayout>