Android BroadcastReceiver应用

1. 创建Receiver，两种方式，动态和静态：

  （1）静态注册：

 首先自定义个Receiver，

public class MyReceiver extends BroadcastReceiver {

    @Override
    public void onReceive(Context context, Intent intent) {
        // TODO Auto-generated method stub
        Toast.makeText(context, "MyReceiver broadcast", 10000).show();
    }

}

然后在AndroidManifest注册即可：

        <receiver android:name=".MyReceiver">
            <intent-filter>
                <action android:name="com.test.broadcasting" />
            </intent-filter>
        </receiver>

  （2）动态注册：

    private void regReceiver() {
        IntentFilter intentFilter = new IntentFilter();
        intentFilter.addAction("com.test.broadcasting");
        // 注册BroadcastReceiver
        this.registerReceiver(receiver, intentFilter);

        // 取消注册
        // this.unregisterReceiver(receiver);
    }

    private BroadcastReceiver receiver = new BroadcastReceiver() {
        @Override
        public void onReceive(Context context, Intent intent) {
            Toast.makeText(context, "receive broadcast", 10000).show();
        }
    };

    2.发送广播：

这个非常简单，只需一行代码即可：

this.sendBroadcast(new Intent("com.test.broadcasting"));

3. 应用场景：

  最常见的就是SD插拔的广播注册(android.content.Intent.ACTION_MEDIA_MOUNTED).