android 自动启动应用程序

android 监听一些系统的广播可以帮助我们做很多事情比如启动应用，app数据同步，闹钟提醒等等

广播监听网络启动应用

manifest

 <receiver
            android:name=".MyReceiver"
            android:enabled="true"
            android:exported="true" >
            <intent-filter>
                <action android:name="android.net.conn.CONNECTIVITY_CHANGE"></action>
            </intent-filter>
        </receiver>

 1 public class MyReceiver extends BroadcastReceiver {
 2     public MyReceiver() {
 3     }
 4 
 5     @Override
 6     public void onReceive(Context context, Intent intent) {
 7 
 8         ConnectivityManager manager = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);
 9         NetworkInfo mobileInfo = manager.getNetworkInfo(ConnectivityManager.TYPE_MOBILE);
10         NetworkInfo wifiInfo = manager.getNetworkInfo(ConnectivityManager.TYPE_WIFI);
11         NetworkInfo activeInfo = manager.getActiveNetworkInfo();
12         if((mobileInfo.isConnected() || wifiInfo.isConnected()) && activeInfo != null) {
13             Intent intent1 = new Intent(context,MainActivity.class);
14             intent1.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
15             context.startActivity(intent1);
16         }
17         Toast.makeText(context,"网络变化",Toast.LENGTH_LONG).show();
18     }
19 }

但是监听这也系统的广播也是很浪费系统资源的。