Android 应用程序网络连接不可用时的弹窗处理

public void run() { if (!isNetworkAvailable()) { LogHelper.d(TAG, 'Network is not available.');

            return;
        }
        AlertDialog.Builder builder = new AlertDialog.Builder(this);
        builder.setTitle('Network Unavailable');
        builder.setMessage('Please check your internet connection.');
        builder.setPositiveButton('OK', null);
        builder.show();
    }