Android AsyncTask 进度条 | ExpandableListView

本文介绍了Android AsyncTask 进度条的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！

问题描述

我在一个项目中有一个 expandableListView .如果有人点击组，那么数据必须加载，加载时间必须出现进度条.我想通过异步任务来完成.请给我示例代码.提前致谢.

I am having a expandableListView in a project . If somebody clicks on the group then data must be load and loading time a progress bar must come.I want to do it by Async Task .please give me example code for that.Thanks in advance.

推荐答案

请试试这个

public class LoadData extends AsyncTask<Void, Void, Void> {
    ProgressDialog progressDialog;
    //declare other objects as per your need
    @Override
    protected void onPreExecute()
    {
        progressDialog= ProgressDialog.show(YourActivity.this, "Progress Dialog Title Text","Process Description Text", true);

        //do initialization of required objects objects here
    };
    @Override
    protected Void doInBackground(Void... params)
    {

         //do loading operation here
        return null;
    }
    @Override
    protected void onPostExecute(Void result)
    {
        super.onPostExecute(result);
        progressDialog.dismiss();
    };
 }

您可以使用

LoadData task = new LoadData();
task.execute();

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