ClipDrawable制作图片渐进效果

建立ClipDrawable，标签clip，并指定一张图片

<?xml version="1.0" encoding="utf-8"?><clip xmlns:android="http://schemas.android.com/apk/res/android"    android:drawable="@drawable/pic_android"    android:clipOrientation="horizontal"    android:gravity="left" ></clip>

建立布局文件，并引用ClipDrawable资源，

android:src="@drawable/my_clip_1"

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:layout_width="match_parent"    android:layout_height="match_parent"    android:orientation="vertical" >    <ImageView         android:layout_width="match_parent"        android:layout_height="match_parent"        android:background="#3e3e3e"        android:src="@drawable/my_clip_1"        android:id="@+id/imageview"/></LinearLayout>

java代码

package com.example.android_test;import java.util.Timer;import java.util.TimerTask;import android.app.Activity;import android.graphics.drawable.ClipDrawable;import android.os.Bundle;import android.os.Handler;import android.os.Message;import android.widget.ImageView;public class ClipDrawableTest extends Activity {@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.clip_layout);ImageView imageView=(ImageView) findViewById(R.id.imageview);//获取图像所显示的ClipDrawable对象final ClipDrawable clipDrawable=(ClipDrawable) imageView.getDrawable();final Handler handler=new Handler(){@Overridepublic void handleMessage(Message msg) {if (msg.what==0x111) {//修改ClipDrawable的level值clipDrawable.setLevel(clipDrawable.getLevel()+200);}}};final Timer timer=new Timer();timer.schedule(new TimerTask() {@Overridepublic void run() {Message message=new Message();message.what=0x111;handler.sendMessage(message);//默认的level是0，表示全部裁剪掉了，图片不可见，//但是显示的时候，依然会占据位置。当level是10,000，//图片相当于没裁剪，完全可见。if (clipDrawable.getLevel()>=10000) {timer.cancel();}}}, 0,300);//表示 0 秒钟后开始 以0.3 秒钟为周期 重复执行}}

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