You have to add the time how long it should work!!!
On 29 Mrz., 17:40, "vincent.gann...@gmail.com"
<vincent.gann...@gmail.com> wrote:
> Hi all,
>
> I have a main activity that launches a sub activity when the user
> clicks a button as follows:
>
> private OnClickListener buttonDirectoryListener = new OnClickListener
> () {
> public void onClick(View v) {
> Intent intent = new Intent();
> intent.setClass(Main.this, Sub.class);
> startActivity(intent);
> }
>
> }
>
> Unfortunatly, the onCreate method of the sub activity can take a long
> time (server request, xml parsing, custom layout creation, ...). So I
> want to display an indeterminate ProgressDialog while the sub activity
> is being created and then dismiss it when main activity is no longer
> visible. I found a few threads claiming that a separate thread
> is needed to run the progress dialog. So I updated my code as follows:
>
> ProgressDialog pd;
>
> private OnClickListener buttonDirectoryListener = new OnClickListener
> () {
> public void onClick(View v) {
> pd = new ProgressDialog(this);
> pd.setIndeterminate(true);
> pd.show();
> new Thread() {
> public void run() {
> Intent intent = new Intent();
> intent.setClass(Main.this, Sub.class);
> startActivity(intent);
> }
> }.start();
> }
>
> }
>
> @Override
> public void onStop() {
> super.onStop();
> pd.dismiss();
>
> }
>
> It seems to work sometime. But most of the time, the ProgressDialog is
> not showing (or disappareing fastly), I only get a black sreen until
> the sub activity is shown. Poor effect. I guess it might lead to an
> ANR dialog in real situation. I guess the main activity receives
> onStop event before the sub activity is shown. I would like to
> indicate loading through the ProgressDialog until the sub activity
> gets ready to be displayed.
>
> I'm convinced other developers are facing such a problem and I'm
> probably doing something wrong. Any help is welcome. Thanks.
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