一、發(fā)送標(biāo)準(zhǔn)廣播

Intent intent = new Intent("com.example.broadcasttest. MY_BROADCAST");
sendBroadcast(intent);

二癣疟、發(fā)送有序廣播

Intent intent = new Intent("com.example.broadcasttest. MY_BROADCAST");
sendOrderedBroadcast(intent, null);

截斷廣播：

public class MyBroadcastReceiver extends BroadcastReceiver {
    @Override
    public void onReceive(Context context, Intent intent) {
        Toast.makeText(context, "received in MyBroadcastReceive", Toast.LENGTH_SHORT).show();
        abortBroadcast();
    }
}

abortBroadcast();

• 截斷后摸袁，后續(xù)的接收器就不會接收到廣播了。

• 接收廣播的先后順序：優(yōu)先級 android:priority：

<receiver android:name=".MyBroadcastReceiver">
    <intent-filter android:priority="100" >
        <action android:name="com.example.broadcasttest.MY_BROADCAST"/>
    </intent-filter>
</receiver>

三庇忌、本地廣播

• 前面我們發(fā)送和接收的廣播全部都是屬于系統(tǒng)全局廣播窗骑，即發(fā)出的廣播可以被其他任何的任何應(yīng)用程序接收到，并且我們也可以接收來自于其他任何應(yīng)用程序的廣播漆枚。這樣就很容易會引起安全性的問題创译。
• Android 本地廣播機(jī)制，使用這個機(jī)制發(fā)出的廣播只能夠在應(yīng)用程序的內(nèi)部進(jìn)行傳遞墙基，并且廣播接收器也只能接收來自本應(yīng)用程序發(fā)出的廣播软族，這樣所有的安全性問題就都不存在了。
• 本地廣播是無法通過靜態(tài)注冊的方式來接收的残制。因為要用時程序肯定已經(jīng)啟動了立砸。

public class MainActivity extends Activity {
    private IntentFilter intentFilter;
    private LocalReceiver localReceiver;
    private LocalBroadcastManager localBroadcastManager;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        localBroadcastManager = LocalBroadcastManager.getInstance(this);  // 獲取實例

        Button button = (Button) findViewById(R.id.button);
        button.setOnClickListener(new OnClickListener() {
            @Override
            public void onClick(View v) {
                
                Intent intent = new Intent("com.example.broadcasttest. LOCAL_BROADCAST");
                localBroadcastManager.sendBroadcast(intent); // 發(fā)送本地廣播

            }
        });

        intentFilter = new IntentFilter();
        intentFilter.addAction("com.example.broadcasttest.LOCAL_BROADCAST");
        localReceiver = new LocalReceiver();
        localBroadcastManager.registerReceiver(localReceiver, intentFilter); // 注冊本地廣播監(jiān)聽器
    }
    @Override
    protected void onDestroy() {
        super.onDestroy();
        localBroadcastManager.unregisterReceiver(localReceiver);
    }

    class LocalReceiver extends BroadcastReceiver {
        @Override
        public void onReceive(Context context, Intent intent) {
            Toast.makeText(context, "received local broadcast", Toast.LENGTH_SHORT).show();
        }
    }
}

localBroadcastManager = LocalBroadcastManager.getInstance(this); // 獲取實例

Intent intent = new Intent("com.example.broadcasttest. LOCAL_BROADCAST");
localBroadcastManager.sendBroadcast(intent); // 發(fā)送本地廣播

localBroadcastManager.unregisterReceiver(localReceiver);

intentFilter = new IntentFilter(); 
intentFilter.addAction("com.example.broadcasttest.LOCAL_BROADCAST"); 
localReceiver = new LocalReceiver(); 
localBroadcastManager.registerReceiver(localReceiver, intentFilter); // 注冊本地廣播監(jiān)聽器