Android 启动Service监听网络状态

我们在做多线程下载的时候，或者是在加载h5界面的时候，常常会遇到网络状态不好或者断网的时候，在这或者当我们的应用程序启动没有退出的时候，我们就需要对网络状态监听加以判断。

这时候，我们一般情况下，两种方式进行处理。

第一：开启服务。

第二：发送广播的形式。

建议采用方法二。

 @Override protected void onCreate(Bundle savedInstanceState) {  super.onCreate(savedInstanceState);  setContentView(R.layout.activity_main);  IntentFilter intentFilter = new IntentFilter();  intentFilter.addAction(ConnectivityManager.CONNECTIVITY_ACTION);  registerReceiver(connectionReceiver, intentFilter); } @Override public boolean onCreateOptionsMenu(Menu menu) {  // Inflate the menu; this adds items to the action bar if it is present.  getMenuInflater().inflate(R.menu.main, menu);  return true; } public boolean isNetworkConnected(Context context) {  if (context != null) {   ConnectivityManager mConnectivityManager = (ConnectivityManager) context     .getSystemService(Context.CONNECTIVITY_SERVICE);   NetworkInfo mNetworkInfo = mConnectivityManager.getActiveNetworkInfo();   if (mNetworkInfo != null) {    return mNetworkInfo.isAvailable();   }  }  return false; } public boolean isWifiConnected(Context context) {  if (context != null) {   ConnectivityManager mConnectivityManager = (ConnectivityManager) context     .getSystemService(Context.CONNECTIVITY_SERVICE);   NetworkInfo mWiFiNetworkInfo = mConnectivityManager     .getNetworkInfo(ConnectivityManager.TYPE_WIFI);   if (mWiFiNetworkInfo != null) {    return mWiFiNetworkInfo.isAvailable();   }  }  return false; } public boolean isMobileConnected(Context context) {  if (context != null) {   ConnectivityManager mConnectivityManager = (ConnectivityManager) context     .getSystemService(Context.CONNECTIVITY_SERVICE);   NetworkInfo mMobileNetworkInfo = mConnectivityManager     .getNetworkInfo(ConnectivityManager.TYPE_MOBILE);   if (mMobileNetworkInfo != null) {    return mMobileNetworkInfo.isAvailable();   }  }  return false; } public static int getConnectedType(Context context) {  if (context != null) {   ConnectivityManager mConnectivityManager = (ConnectivityManager) context     .getSystemService(Context.CONNECTIVITY_SERVICE);   NetworkInfo mNetworkInfo = mConnectivityManager.getActiveNetworkInfo();   if (mNetworkInfo != null && mNetworkInfo.isAvailable()) {    return mNetworkInfo.getType();   }  }  return -1; } BroadcastReceiverconnectionReceiver = new BroadcastReceiver() {  @Override  public void onReceive(Context context, Intent intent) {   ConnectivityManager connectMgr = (ConnectivityManager) getSystemService(CONNECTIVITY_SERVICE);   NetworkInfo mobNetInfo = connectMgr.getNetworkInfo(ConnectivityManager.TYPE_MOBILE);   NetworkInfo wifiNetInfo = connectMgr.getNetworkInfo(ConnectivityManager.TYPE_WIFI);   if (!mobNetInfo.isConnected() && !wifiNetInfo.isConnected()) {    Log.i(TAG, "unconnect");    // unconnect network   }else {    // connect network   }  } }; /*@Override protected void onDestroy() { };*/ @Override protected void onDestroy() {  if (connectionReceiver != null) {   unregisterReceiver(connectionReceiver);  }  super.onDestroy(); }

广播：源代码如下：

/** * 有网络的广播 */BroadcastReceiverconnectionReceiver = new BroadcastReceiver() {@Overridepublic void onReceive(Context context, Intent intent) {ConnectivityManager connectMgr = (ConnectivityManager) getSystemService(CONNECTIVITY_SERVICE);NetworkInfo mobNetInfo = connectMgr.getNetworkInfo(ConnectivityManager.TYPE_MOBILE);NetworkInfo wifiNetInfo = connectMgr.getNetworkInfo(ConnectivityManager.TYPE_WIFI);if (!mobNetInfo.isConnected() && !wifiNetInfo.isConnected()) {Log.i("yuyahao", "断网了");Message msg = new Message();msg.what = DownLoadFileUtil.isNetConnectionError;mHandler.sendMessage(msg);// unconnect network}else {// connect networkLog.i(TAG, "有来网了");}}};

//有网络的时候在注册网络监听广播IntentFilter intentFilter = new IntentFilter();intentFilter.addAction(ConnectivityManager.CONNECTIVITY_ACTION);registerReceiver(connectionReceiver, intentFilter);showDialog();pool.execute(mUpdateUIThread);

其完整的代码如下：

方法1就是开启service的方式。代码很简单。

demo下载地址如下：

监听网络状态demo.jar

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