一、发送标准广播

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

二、发送有序广播

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

截断广播：

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();

• 截断后，后续的接收器就不会接收到广播了。

• 接收广播的先后顺序：优先级 android:priority：

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

三、本地广播

• 前面我们发送和接收的广播全部都是属于系统全局广播，即发出的广播可以被其他任何的任何应用程序接收到，并且我们也可以接收来自于其他任何应用程序的广播。这样就很容易会引起安全性的问题。
• Android 本地广播机制，使用这个机制发出的广播只能够在应用程序的内部进行传递，并且广播接收器也只能接收来自本应用程序发出的广播，这样所有的安全性问题就都不存在了。
• 本地广播是无法通过静态注册的方式来接收的。因为要用时程序肯定已经启动了。

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);  // 获取实例

        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); // 发送本地广播

            }
        });

        intentFilter = new IntentFilter();
        intentFilter.addAction("com.example.broadcasttest.LOCAL_BROADCAST");
        localReceiver = new LocalReceiver();
        localBroadcastManager.registerReceiver(localReceiver, intentFilter); // 注册本地广播监听器
    }
    @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); // 获取实例

Intent intent = new Intent("com.example.broadcasttest. LOCAL_BROADCAST");
localBroadcastManager.sendBroadcast(intent); // 发送本地广播

localBroadcastManager.unregisterReceiver(localReceiver);

intentFilter = new IntentFilter(); 
intentFilter.addAction("com.example.broadcasttest.LOCAL_BROADCAST"); 
localReceiver = new LocalReceiver(); 
localBroadcastManager.registerReceiver(localReceiver, intentFilter); // 注册本地广播监听器