Android网络状态监听

本教程实现Android网络状态实时监听

MainActivity中

public class FirstActivity extends Activity implements OnClickListener {private IntentFilter intentFilter;private NetworkChangReceiver networkChangeReceiver;@Overrideprotected void onCreate(Bundle arg0) {super.onCreate(arg0);setContentView(R.layout.activity_first);// 实现网络状态监听intentFilter = new IntentFilter();intentFilter.addAction("android.net.conn.CONNECTIVITY_CHANGE");networkChangeReceiver = new NetworkChangReceiver();registerReceiver(networkChangeReceiver, intentFilter);}protected void onDestroy() {// TODO Auto-generated method stubsuper.onDestroy();unregisterReceiver(networkChangeReceiver);}class NetworkChangReceiver extends BroadcastReceiver {@Overridepublic void onReceive(Context context, Intent intent) {ConnectivityManager connectivityManager = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);NetworkInfo networkInfo = connectivityManager.getActiveNetworkInfo();if (networkInfo != null && networkInfo.isAvailable()) { Toast.makeText(getApplicationContext(), "有网",Toast.LENGTH_SHORT).show();} else { Toast.makeText(getApplicationContext(), "没网",Toast.LENGTH_SHORT).show();}}}}

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