静态定义的receiver接收broadcast intent

[ static broadcast receiver]

1. Activity 通过sendBroadcast()发送Intent数据

2. MyReceiver接收broadcast 所发送的Intent，并通过Intent提取参数

[ In Activity ]

在当前Activity类中，有如下代码片段，用于broadcast Intent

Intent intent = getIntent4Broadcast();
/*the same as *this.sendBroadcast(intent);*/
sendBroadcast(intent);public Intent getIntent4Broadcast(){Bundle b = new Bundle();b.putString("arg0","data1");Intent intent = new Intent();/* Receiver will filter the term * com.example.lab3.static_bc*/intent.setAction("com.example.lab3.static_bc");intent.putExtra("data", b);return intent;
}

[ Definite BroadcastReceiver ]

e.g. MyReceiver.java
extends BroadcastReceiver 重新定义onReceive接口

public class MyReceiver extends BroadcastReceiver{@Overridepublic void onReceive(Context context, Intent intent){Bundle b = intent.getBundleExtra("data");// do something with b}
}

[ Manifest.xml ]

静态定义的BroadcastReceiver
需要在Manifest中注册Receiver

<application......>......//MyReceiver 是receiver的类名<receiver android:name="MyReceiver" ><intent-filter><action android:name="com.example.lab3.static_bc" ></action></intent-filter></receiver>......</application>

[ dynamic broadcast receiver ]

1. 在Activity中定义Receiver和IntentFilter
2. 在onCreate中发送broadcast, 定义的Receiver处理broadcast

[ 在Activity中，定义BroadcastReceiver ]

    .../*definite inner class* 定义内部类 BroadcastReceiver*/public BroadcastReceiver bcr = new BroadcastReceiver(){  @Overridepublic void onReceive(Context context, Intent intent) {  //do something with intent  }};...

[ 在Activity中注册BroadcastReceiver ]

在哪个函数里register BroadcastReceiver，又在哪个函数里unregister呢？
参考：在发送broadcast之前，确保已经register了。
when click app-icon onCreate()->onStart()->onResume()
when click back_btn onPause()
可以在onStop()中写unregister, 在onCreate()和onStart()中register.

...
private IntentFilter filter = new IntentFilter();
...
//register receiver
filter.addAction("com.example.lab3.dynamic_bc");
registerReceiver(bcr, filter);
...
//unregister receiver
unregisterReceiver(bcr);
...

[ broadcast intent ]

Intent intent = initializeTheIntentForBroadcast();
sendBroadcast(intent)