Android BroadcastReceiver應用

1. 建立Receiver，兩種方式，動態和靜態：

  （1）靜態註冊：

 首先自訂個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();
    }

}

 

然後在AndroidManifest註冊即可：

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

 

 

  （2）動態註冊：

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

        // 取消註冊
        // this.unregisterReceiver(receiver);
    }

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

 

 

    2.發送廣播：

這個非常簡單，只需一行代碼即可：

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

 

 

3. 應用情境：

  最常見的就是SD插拔的廣播註冊(android.content.Intent.ACTION_MEDIA_MOUNTED).