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() {
					@Override
					public void onClick(DialogInterface dialog, int which) {
						// TODO Auto-generated method stub
						Intent 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() {
					@Override
					public void onClick(DialogInterface dialog, int which) {
						dialog.dismiss();
						finish();
					}
				}).show();
	}