Question

I am using AsyncTask to download files. There i implemented progress:

//Updating progress dialog
protected void onProgressUpdate(Integer... changed) {
    progressDialog.setProgress(changed[0]);
}

//STARTED 
@Override
protected void onPreExecute() {

    try {
        progressDialog = new ProgressDialog(context);
        progressDialog.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL);
        progressDialog.setMessage(context
                .getString(R.string.message_loading));
        progressDialog.setCancelable(false);
        progressDialog.show();
    } catch (Exception e) {
        // TODO: handle exception
        e.printStackTrace();
    }
}

Everything is working fine in portrait and landscape. For notification that file was downloaded i am using interface.

So wrong is when i start downloading my file in portrait or landscape and while it not done i rotate device then progress disappear and callback fire exception as there is no where to go.

When i rotate device my Activity is re created, so how to do this properly. I need to restrict that when downloading is started user couldn’t rotate device, then how to do that.

Or there are solutions to this ?

Answer 1

If you want to restrict orientation while downloading then just before starting downloads use this code. this will restrict users device orientation.

int current_orientation = getResources().getConfiguration().orientation;
if (current_orientation == Configuration.ORIENTATION_LANDSCAPE) {
    setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE);
} else {
    setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);
}

This code you can use after finishing orientation which allow user to rotate device again.

setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_SENSOR);

hope it will help you.