Android判断网络状态

<uses-permission  android:name="android.permission.ACCESS_NETWORK_STATE" />  
  
private boolean<span id="transmark"></span> getNetWorkStatus() {  
  
   boolean netSataus = false;  
   ConnectivityManager cwjManager = (ConnectivityManager) getSys<span id="transmark"></span>temService(Context.CONNECTIVITY_SERVICE);  
  
   cwjManager.getActiveNetworkInfo();  
  
   if (cwjManager.getActiveNetworkInfo() != null) {  
   	netSataus = cwjManager.getActiveNetworkInfo().isAvailable();  
   }  
  
   if (!netSataus) {  
   	Builder b = new AlertDialog.Builder(this).setTitle("没有可用的网络")  
   		.setMessage("是否对网络进行设置？");  
   	b.setPositiveButton("是", new DialogInterface.OnClickListener() {  
   		public void onClick(DialogInterface dialog, int whichButton) {  
   			Intent mIntent = new Intent("/");  
   			ComponentName comp = new ComponentName("com.android.settings", "com.android.settings.WirelessSettings");  
   			mIntent.setComponent(comp);  
   			mIntent.setAction("android.intent.action.VIEW");  
   			startActivityForResult(mIntent,0);   
  	 	}  
   	}).setNeutralButton("否", new DialogInterface.OnClickListener() {  
   		public void onClick(DialogInterface dialog, int whichButton) {  
   			dialog.cancel();  
  		}  
   	}).show();  
   }  
   return netSataus;