註釋直接寫在代碼裡,比較直觀,我覺得這些定義系統的廣播的宏,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 {
//定義一個過濾器;
private IntentFilter intentFilter;
//定義一個廣播監聽器;
private NetChangReceiver netChangReceiver;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.fragment_main);
//實例化過濾器;
intentFilter = new IntentFilter();
//添加過濾的Action值;
intentFilter.addAction(Intent.ACTION_AIRPLANE_MODE_CHANGED);
//實例化廣播監聽器;
netChangReceiver = new NetChangReceiver();
//將廣播監聽器和過濾器註冊在一起;
registerReceiver(netChangReceiver, intentFilter);
}
@Override
protected void onDestroy() {
// TODO Auto-generated method stub
super.onDestroy();
//銷毀Activity時取消註冊廣播監聽器;
unregisterReceiver(netChangReceiver);
}
//創建一個繼承BroadcastReceiver的廣播監聽器;
class NetChangReceiver extends BroadcastReceiver {
//重寫onReceive方法,該方法的實體為,接收到廣播後的執行代碼;
@Override
public void onReceive(Context context, Intent intent) {
// TODO Auto-generated method stub
Log.i("MainActivity", "飛行模式啟動~");
Toast.makeText(MainActivity.this, "飛行模式啟動~", Toast.LENGTH_SHORT)
.show();
}
}
}