Android的 - 显示警告对话框空的ListView [英] Android - Display Alert Dialog for empty ListView

问题描述

如何显示空列表视图中的警告对话框时，有没有列表视图项目。请发现有三个文本框下面的图片。我有当有列表中没有记录/匹配的记录来实现空列表视图。

How to show the alert dialog for the empty list view when there are no listview items. Please find the below image having three text fields. I have to implement the empty list view when there are no records/unmatched records in the list.

列表视图实现如下：

ListView empListView; 
empListView = (ListView)findViewById(R.id.list1 );

我要显示的empListView的警告对话框。请帮我与样品code /链接。

I have to show the alert dialog box for the empListView. Please help me with the samplecode/links.

推荐答案

这一切都取决于你如何实现setAdapter方法​​等，但这里有一个例子：

It all depends on how you implement the setAdapter method etc. But here is an example:

if(cdata.getCount()==0) {
  //empty, show alertDialog
  AlertDialog.Builder builder = new AlertDialog.Builder(this);
  builder.setMessage("Search is empty")
   .setCancelable(true)
   .setPositiveButton("Ok", new DialogInterface.OnClickListener() {
       public void onClick(DialogInterface dialog, int id) {
            dialog.cancel();
       }
   });
  AlertDialog alert = builder.create();
} 
else {
  //Not empty, set the adapter or do what you want. 
  empListview.setAdapter(new MyCursorAdapter( getApplicationContext(), R.layout.listview, cdata, fields, names));
}

在code以上还没有经过测试。但要稍作调整工作，我可能会忘记一些东西。

The code above havent been tested. But should work with minor adjustments, I might have forgotten something.

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