建立ClipDrawable,標籤clip,並指定一張圖片
<?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>
建立佈局文件,並引用ClipDrawable資源,
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代碼
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 {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.clip_layout);
ImageView imageView=(ImageView) findViewById(R.id.imageview);
//獲取圖像所顯示的ClipDrawable對象
final ClipDrawable clipDrawable=(ClipDrawable) imageView.getDrawable();
final Handler handler=new Handler(){
@Override
public 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() {
@Override
public void run() {
Message message=new Message();
message.what=0x111;
handler.sendMessage(message);
//默認的level是0,表示全部裁剪掉了,圖片不可見,
//但是顯示的時候,依然會佔據位置。當level是10,000,
//圖片相當於沒裁剪,完全可見。
if (clipDrawable.getLevel()>=10000) {
timer.cancel();
}
}
}, 0,300);//表示 0 秒鐘後開始 以0.3 秒鐘爲週期 重複執行
}
}