Android AsyncTask进度条

Question

  

可能重复：
  Progressbar togther with asyncTask

我在项目中有一个expandableListView。如果有人点击该组，那么必须加载数据并且必须加载进度条的加载时间。我想通过异步任务来完成。请给我示例代码。 提前谢谢。

Answer 1

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

调用此方法

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