显示progressdialog而列表视图是加载 [英] display progressdialog while listview is loading

问题描述

我要显示ProgressDialog而列表视图是加载。我已经尝试过类似下面的代码，但没有奏效。

I want to display ProgressDialog while listview is loading. I've already tried like following coding but it didn't work.

final ProgressDialog dialog = ProgressDialog.show(this, "indeterminate", "Please wait while loading", true);
final Handler handler = new Handler() {
   public void handleMessage(Message msg) {
      dialog.dismiss();
      }
   };
Thread checkUpdate = new Thread() {  
   public void run() {
      // listview will be populated here    
      PopulateListView();           
      handler.sendEmptyMessage(0);
      }
   };
checkUpdate.start();

但是，这并不在所有的工作。

But it didn't work at all.

推荐答案

ppshein ......我想你错过了几个电话。

ppshein... I think you are missing a few calls.

1) new Thread( new Runnable() {
2) super.handleMessage
3) switch(msg.what)

我有工作code <一个href="http://sites.google.com/site/jalcomputing/home/mac-osx-android-programming-tutorial/playing-around-with-threads"相对=nofollow>在这里。 此外AsyncTask的这里

I have working code here. Also AsyncTask here.

这篇关于显示progressdialog而列表视图是加载的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！