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android 检查可用网络的代码推荐

  【IT168技术】在手机应用与网络交互数据的时候,我们首先要判断有没有可用的网络,如果没有则跳到相应的网络设置页面,方法详见代码:

private boolean CheckNetwork() {
      
boolean flag = false;
       ConnectivityManager cwjManager
= (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);
      
if (cwjManager.getActiveNetworkInfo() != null)
           flag
= cwjManager.getActiveNetworkInfo().isAvailable();
      
if (!flag) {
           Builder b
= new AlertDialog.Builder(this).setTitle("没有可用的网络").setMessage("请开启GPRS或WIFI网络连接");
           b.setPositiveButton(
"确定", 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");
                   startActivity(mIntent);
               }
           }).setNeutralButton(
"取消", new DialogInterface.OnClickListener() {
              
public void onClick(DialogInterface dialog, int whichButton) {
                   dialog.cancel();
               }
           }).create();
           b.show();
       }



       return flag;
   }

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