Android两种注册广播的方式

静态注册

在AndroidManifest.xml文件中进行注册，当APP退出后，Receiver仍然可以接收到广播并且进行相应的处理。
在application标签下注册

<receiver android:name=".BootCompleteReceiver" >
    <intent-filter>
        <action android:name="android.intent.action.BOOT_COMPLETED" />
    </intent-filter>
</receiver>

动态注册

在代码中注册，当APP退出后就没办法在接收广播。

public class MainActivity extends Activity {
    private IntentFilter intentFilter;
    private NetworkChangeReceiver networkChangeReceiver;
    
    @Override
    protected void onCreate(Bundle savedInstanceState){
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        
        intentFilter = new IntentFilter();
        intentFilter.addAction("android.net.conn.CONNECTIVITY_CHANGE");
        networkChangeReceiver = new NetworkChangeReceiver();
        registerReceiver(networkChangeReceiver, intentFilter);
    }
    
    @Override
    protected void onDestroy(){
        super.onDestroy();
        unregisterReceiver(networkChangeReceiver);
    }
    
    class NetworkChangeReceiver extends BroadcastReceiver{
        
        @Override
        public void onReceive(Context context, Intent, intent){
            //接收广播后的处理
            ...
        }
    }
}