Android:动态注册BroadcastReceiver
注释直接写在代码里,比较直观,我觉得这些定义系统的广播的宏,不是很好使;
MainActivity.java:
package com.vrinux.broadcastdemo;
import android.app.Activity;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.os.Bundle;
import android.util.Log;
import android.widget.Toast;
public class MainActivity extends Activity {
//定义一个过滤器;
private IntentFilter intentFilter;
//定义一个广播监听器;
private NetChangReceiver netChangReceiver;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.fragment_main);
//实例化过滤器;
intentFilter = new IntentFilter();
//添加过滤的Action值;
intentFilter.addAction(Intent.ACTION_AIRPLANE_MODE_CHANGED);
//实例化广播监听器;
netChangReceiver = new NetChangReceiver();
//将广播监听器和过滤器注册在一起;
registerReceiver(netChangReceiver, intentFilter);
}
@Override
protected void onDestroy() {
// TODO Auto-generated method stub
super.onDestroy();
//销毁Activity时取消注册广播监听器;
unregisterReceiver(netChangReceiver);
}
//创建一个继承BroadcastReceiver的广播监听器;
class NetChangReceiver extends BroadcastReceiver {
//重写onReceive方法,该方法的实体为,接收到广播后的执行代码;
@Override
public void onReceive(Context context, Intent intent) {
// TODO Auto-generated method stub
Log.i("MainActivity", "飞行模式启动~");
Toast.makeText(MainActivity.this, "飞行模式启动~", Toast.LENGTH_SHORT)
.show();
}
}
}
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