网络状态监听

网络状态监听

定义一个广播接收器和状态变化接口

  1. public class NetBroadcastReceiver extends BroadcastReceiver {
  2.     public static ArrayList<NetEventHandler> mListeners = new ArrayList<NetEventHandler>();
  3.     private static String NET_CHANGE_ACTION = "android.net.conn.CONNECTIVITY_CHANGE";
  5.     @Override
  6.     public void onReceive(Context context, Intent intent) {
  7.         Log.i("dsc", "dsc");
  8.         if (intent.getAction().equals(NET_CHANGE_ACTION)) {
  9.             MainActivity.mNetWorkState = NetUtil.getNetworkState(context);
  10.             if (mListeners.size() > 0)//通知接口完成加载
  11.                 for (NetEventHandler handler : mListeners) {
  12.                     handler.onNetChange();
  13.            }
  14.         }
  15.     }
  17.     public interface NetEventHandler {
  18.         public void onNetChange();
  19.     }
  20. }

网络状态工具类

  1. public class NetUtil {
  2.     public static final int NETWORN_NONE = 0;
  3.     public static final int NETWORN_WIFI = 1;
  4.     public static final int NETWORN_MOBILE = 2;
  6.     public static int getNetworkState(Context context) {
  7.         ConnectivityManager connManager = (ConnectivityManager) context
  8.                 .getSystemService(Context.CONNECTIVITY_SERVICE);
  9.         // Wifi
  10.         State state = connManager.getNetworkInfo(ConnectivityManager.TYPE_WIFI)
  11.                 .getState();
  12.         if (state == State.CONNECTED || state == State.CONNECTING) {
  13.             return NETWORN_WIFI;
  14.         }
  16.         // 3G
  17.         state = connManager.getNetworkInfo(ConnectivityManager.TYPE_MOBILE)
  18.                 .getState();
  19.         if (state == State.CONNECTED || state == State.CONNECTING) {
  20.             return NETWORN_MOBILE;
  21.         }
  22.         return NETWORN_NONE;
  23.     }
  24. }

主要实现

  1. public class MainActivity extends AppCompatActivity implements NetBroadcastReceiver.NetEventHandler{
  2.     public static int mNetWorkState;
  3.     private NetBroadcastReceiver netReceiver;//网络状态监测
  4.     private boolean netState = false;
  6.     @Override
  7.     protected void onCreate(Bundle savedInstanceState) {
  8.         super.onCreate(savedInstanceState);
  9.         setContentView(R.layout.activity_main);
  10.         //注册网络监听广播
  11.         regist();
  12.     }
  14.     @Override
  15.     public void onDestroy() {
  16.         super.onDestroy();
  17.         Log.e("myLog", "TaskListFragment执行销毁");
  18.         unregisterReceiver(netReceiver);
  19.     }
  21.     /**
  22.      * 注册广播
  23.      */
  24.     private void regist() {
  25.         netReceiver = new NetBroadcastReceiver();
  26.         IntentFilter filter = new IntentFilter();
  27.         filter.addAction("android.net.conn.CONNECTIVITY_CHANGE");
  28.         registerReceiver(netReceiver, filter);
  29.         NetBroadcastReceiver.mListeners.add(this);
  30.     }
  32.     @Override
  33.     public void onNetChange() {
  34.         if (getApplicationContext()== null) {
  35.             return;
  36.         }
  37.         if (NetUtil.getNetworkState(this) == NetUtil.NETWORN_NONE) {//没有网络
  38.             netState = false;
  39.              Toast.makeText(this, "你的网络已断开连接,请检查网络！", Toast.LENGTH_SHORT).show();
  40.         } else if (NetUtil.getNetworkState(this) == NetUtil.NETWORN_WIFI) {//wifi网络
  41.             netState = true;
  42.             Toast.makeText(this, "你目前是wifi网络！", Toast.LENGTH_SHORT).show();
  43.         } else {//手机网络
  44.             netState = true;
  45.              Toast.makeText(this, "你目前是手机网络！", Toast.LENGTH_SHORT).show();
  46.         }
  47.     }
  48. }

AndroidManifest注册

  1. <receiver android:name=".NetBroadcastReceiver"/>




【推广】 免费学中医，健康全家人
原文地址：https://www.cnblogs.com/wisemen/p/5837194.html