在进度条加载时加载图像

Question

I want to have an async task that loads images from the drawable folder. How could i display a progress bar in another xml? I want to display the images in gallery.

How do I go about doing it? ** It would be helpful if you use the hello gallery code**

Thanks in advance.

Answer 1

If you whant to show a progress bar, you have to create a globar variable to reference the progress bar.

ProgressDialog myProgressDialog;

Then, in the asynk task use the default methods to handle the progressBar

@Override
protected void onPreExecute()
{
    //create the dialog
    progressDialog = ProgressDialog.show(getBaseContext(), "Tittle","Description");
};      
@Override
protected Void doInBackground(Void... params)
{   
    //load the image  
    return null;
}       
@Override
protected void onPostExecute(Void result)
{
    //dismiss te dialog
    progressDialog.dismiss();
};

If you want to use a percent bar you can also use the method

onProgressUpdate()

Answer 2

In async task

send a progressbar(which one you want to update) to asynctask's constructor,In the method doBackground,loading your picture and use method publisProgress(maybe named this,just alt + /),last,updating your progressbar in this method..