Android Drawable 系列——ClipDrawable

ClipDrawable 是一个挺好看的一个图片Drawable，操作起来也算比较简单。下面先把代码贴上来，通过例子进行说明。

main.xml文件的内容：

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

    <ImageView
        android:id="@+id/image"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:src="@drawable/my_clip"
        />

</LinearLayout>

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

	<ImageView 
		android:id="@+id/image"
		android:layout_width="fill_parent"
		android:layout_height="wrap_content"
		android:src="@drawable/my_clip"
		/>
		
</LinearLayout>

这里面重点是android:sec="@drawable/my_clip"，调用了这个配置文件。这个配置文件的内容是：

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

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

上面定义了三个属性。属性一是drawable的图片内容。第二个属性是展开的方向，第三个属性大家都经常用，不阐述。

这样，一个clipDrawable的配置文件都已经搞定了。调用一个clip配置文件，展示效果。比较简单。也很容易给项目添加一点感官上面的好处。

下面是Activity的代码：

package cn.jason.drawable;

import java.util.Timer;
import java.util.TimerTask;

import android.app.Activity;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.widget.ImageView;

public class ClipDrawable extends Activity {
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        ImageView imageView = (ImageView) findViewById(R.id.image);

        final android.graphics.drawable.ClipDrawable  drawable = (android.graphics.drawable.ClipDrawable) imageView.getDrawable();
        final Handler handler = new Handler(){
            @Override
            public void handleMessage(Message msg) {
                if (msg.what == 0x1233) {
                    drawable.setLevel(drawable.getLevel() + 200);

                }
            }
        };

        final Timer timer = new Timer();
        timer.schedule(new TimerTask() {
            @Override
            public void run() {
                Message msg = new Message();
                msg.what= 0x1233;
                handler.sendMessage(msg);
                if (drawable.getLevel() >=10000) {
                    timer.cancel();
                }
            }
        }, 0,300);
    }







}

package cn.jason.drawable;

import java.util.Timer;
import java.util.TimerTask;

import android.app.Activity;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.widget.ImageView;

public class ClipDrawable extends Activity {
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        ImageView imageView = (ImageView) findViewById(R.id.image);
        
        final android.graphics.drawable.ClipDrawable  drawable = (android.graphics.drawable.ClipDrawable) imageView.getDrawable();
        final Handler handler = new Handler(){
        	@Override
        	public void handleMessage(Message msg) {
        		if (msg.what == 0x1233) {
	                drawable.setLevel(drawable.getLevel() + 200);
	                
                }
        	}
        };
        
        final Timer timer = new Timer();
        timer.schedule(new TimerTask() {
			@Override
			public void run() {
				Message msg = new Message();
				msg.what= 0x1233;
				handler.sendMessage(msg);
				if (drawable.getLevel() >=10000) {
	                timer.cancel();
                }
			}
		}, 0,300);
    }
    
    
    
    
    
    
    
}

上面的代码定义了一个Handler，如果接收的是本程序的消息，则进行操作。特别注意。定义ClipDrawable的用法是把Drawable进行转换的。