网络连接失败

/** * 获取当前应用程序的版本号 */private String getVersion() {PackageManager pm = getPackageManager();try {PackageInfo packinfo = pm.getPackageInfo(getPackageName(), 0);String version = packinfo.versionName;return version;} catch (NameNotFoundException e) {e.printStackTrace();return "获取版本号失败";}}/*** * 调用设置网络界面 *  * @param context */public void setNetworkMethod(final Context context) {// 提示对话框android.app.AlertDialog.Builder builder = new Builder(context);builder.setTitle("网络设置提示").setMessage("网络连接不可用,是否进行设置?").setPositiveButton("设置", new DialogInterface.OnClickListener() {@Overridepublic void onClick(DialogInterface dialog, int which) {// TODO Auto-generated method stubIntent intent = null;// 判断手机系统的版本 即API大于10 就是3.0或以上版本if (android.os.Build.VERSION.SDK_INT > 10) {intent = new Intent(android.provider.Settings.ACTION_WIRELESS_SETTINGS);} else {intent = new Intent();ComponentName component = new ComponentName("com.android.settings","com.android.settings.WirelessSettings");intent.setComponent(component);intent.setAction("android.intent.action.VIEW");}context.startActivity(intent);}}).setNegativeButton("取消", new DialogInterface.OnClickListener() {@Overridepublic void onClick(DialogInterface dialog, int which) {dialog.dismiss();finish();}}).show();}