ClipDrawable属性介绍

时间:2021-01-16 15:27:34

ClipDrawable代表从其它位图上截取一个"图片片段",XML中的根元素为<clip.../>,截取的方向由clipOrientation控制

<?xml version="1.0" encoding="utf-8"?>
<clip
xmlns:android="http://schemas.android.com/apk/res/android"
android:drawable="@drawable/drawable_resource"
android:clipOrientation=["horizontal" | "vertical"]
android:gravity=["top" | "bottom" | "left" | "right" | "center_vertical" |
"fill_vertical" | "center_horizontal" | "fill_horizontal" |
"center" | "fill" | "clip_vertical" | "clip_horizontal"] />

android:clipOrientation有两个属性,默认为horizontal
android:gravity有两个属性,默认为left

使用时可以用ClipDrawable的setLevel(int level)方法来设置截取图片的区域大小,当level为0,就是空;为10000时,截取整个图片。

下面是通过这个对象来实现图片缓缓展开的效果。

转自:http://blog.csdn.net/jiaruihua_blog/article/details/12276215

ClipDrawable属性介绍  ClipDrawable属性介绍  ClipDrawable属性介绍

思路:

1.在xml中写clip标签,在drawable中放入一个图片

2.在布局中放一个ImageView,src选择这个xml文件

3.在代码中用Imageview的findViewById()找到imageview对象

4.通过 final ClipDrawable drawable = (ClipDrawable)imageview.getDrawable(); 得到ClipDrawable对象

5.通过Timer和Handler结合来改变截取图片的大小,这里要通过setLevel()来做

6.当ClipDrawable.getLevel() >= 10000时结束截取,因为这时已经截取了全部图片

代码:

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

layout

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".MainActivity" > <ImageView
android:id="@+id/image"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:layout_alignParentLeft="true"
android:layout_alignParentTop="true"
android:scaleType="fitStart"
android:src="@drawable/clip_style"
/> </RelativeLayout>

java

package com.example.clipdrawable; 

import java.util.Timer;
import java.util.TimerTask; import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.app.Activity;
import android.graphics.drawable.ClipDrawable;
import android.view.Menu;
import android.widget.ImageView; public class MainActivity extends Activity { @Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main); ImageView imageView = (ImageView) findViewById(R.id.image);
//获取图片所显示的ClipDrawable对象
final ClipDrawable drawable = (ClipDrawable) imageView.getDrawable();
final Handler handler = new Handler(){
@Override
public void handleMessage(Message msg) {
// TODO Auto-generated method stub
if (msg.what==0x123) {
/**setlevel()设置图片截取的大小
* 修改ClipDrawable的level值,level值为0--10000;
* 0:截取图片大小为空白,10000:截取图片为整张图片;
*/
drawable.setLevel(drawable.getLevel()+200);
}
} };
final Timer timer = new Timer();
timer.schedule(new TimerTask() { @Override
public void run() {
// TODO Auto-generated method stub
Message msg = new Message();
msg.what = 0x123;
handler.sendMessage(msg);
if (drawable.getLevel()>=10000) {
timer.cancel();
}
}
}, 0,300);
}
}

详细参考:

http://blog.csdn.net/lee576/article/details/7827676

http://blog.csdn.net/jiaruihua_blog/article/details/12276215