android编程实现对话框的封装实例

/*** 对话框*/private static ProgressDialog mProgressDialog;/*** 默认的对话框* 标题、内容、两个按钮* @param context* @param title* @param content* @param btnOKStr 是空字符的话 该按钮不显示 (特别注意)* @param btnCancelStr 是空字符的话 该按钮不显示* @param onClick*/public static void showDefaultDialog(Context context,String title,String content,   String btnOKStr,String btnCancelStr,OnClickListener onClick){  showDefaultDialog(context, title, content, btnOKStr, btnCancelStr, onClick, null);}/*** 默认的对话框 + cancel事件* @param context* @param title* @param content* @param btnOKStr* @param btnCancelStr* @param onClick* @param onCancel*/public static void showDefaultDialog(Context context,String title,String content,   String btnOKStr,String btnCancelStr,   OnClickListener onClick,OnCancelListener onCancel){  AlertDialog.Builder mBuilder = new AlertDialog.Builder(context);  if(title != null){   mBuilder.setTitle(title);  }  mBuilder.setMessage(content);  if(btnOKStr == null)   btnOKStr = "确定";  if(btnCancelStr == null)   btnCancelStr = "取消";  if(!btnOKStr.trim().equals(""))   mBuilder.setPositiveButton(btnOKStr, onClick);  if(!btnCancelStr.trim().equals(""))   mBuilder.setNegativeButton(btnCancelStr, onClick);  if(onCancel != null){   mBuilder.setOnCancelListener(onCancel);  }  mBuilder.show();}public static void showProgressDialog(Context context,String msg,boolean cancelable) {//  dismissProgressDialog();  mProgressDialog = new ProgressDialog(context);  mProgressDialog.setMessage(msg);  mProgressDialog.setCancelable(cancelable);  mProgressDialog.show();}public static void dismissProgressDialog(){  if (mProgressDialog != null && mProgressDialog.isShowing()) {   mProgressDialog.dismiss();   mProgressDialog = null;  }}