I have My first Activity - [A] and my Second Activity [B]. I Starting my transparent-[B] Activity from Activity [A] in my PreExecute of BackGroundTask using
Intent intent = new Intent(ActivityA.this, ActivityB.class);
startActivity(intent);
and from my PostExecute i want to close my transparent Activity [B] to continue work with Activity [A] like:
Intent intent = new Intent();
intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
startActivity(intent);
but it give's me Error cause i haven't an correct Intent.
i can do like:
Intent intent = new Intent(getAplicationContext(), ActivityA.class);
intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
startActivity(intent);
This code will create a new Activity [A]. But i need to continue my work with Activity[A] not to create a new Activity [A]. How can i finish() Activity[B] from Activity[A] without errors, go back to Activity[A] and continue my work.
private class BackGroundTask extends AsyncTask<Void, Void, Void>
{
    @Override
    protected void onPreExecute()
    {
        StartPreExecute();
    }
    @Override
    protected Void doInBackground(Void... params)
    {
        //sending request to server and waiting response here
        return null;
    }
    protected void onPostExecute(Void result)
    {
        super.onPostExecute(result);
        StartPostExecute();
    }
}
protected Void doInBackground(Void... params)
{
    return null;
}
private void StartPreExecute()
{
    Intent intent = new Intent(SigninActivity.this, LoadingLayout.class);
    startActivity(intent);
}
private void StartPostExecute()
{
    Intent intent = new Intent(getAplicationContext(), SigninActivity.class);
    intent.addFlags(Intent.FLAG_ACTIVITY_);
    startActivity(intent);
}