Android AsyncTask 等待其他函数完成

Question

I try to execute two function asynchronously in android. So i need that the first function waid the second function. I try to use the AsyncTask to do this.But the problem is that the first function can not wait until the first function finished.

    private class DemandeConge extends AsyncTask<Void, Void, Void> {
    protected void onPreExecute() {
        super.onPreExecute();
        Log.i("we are here", "**************On pre Exceute......***************");
        p=new ProgressDialog(getActivity());
        p.setMessage("Please wait...It is downloading");
        p.setIndeterminate(false);
        p.setCancelable(false);
        p.show();
        Log.i("we are here", "**************On pre Exceute......***************");
    }

    @Override
    protected Void doInBackground(Void... params) {
        Log.i("we are here", "**************oOn doInBackground...***************");
        getSoldeConge();
        Log.i("we are here", "**************On doInBackground...***************");
        return null;
    }

    @Override
    protected void onProgressUpdate(Void... values) {
        super.onProgressUpdate(values);
        Log.i("we are here", "**************onProgressUpdate...***************");
        Log.i("we are here", "**************onProgressUpdate...***************");
    }

    /**
     * `onPostExecute` is run after `doInBackground`, and it's
     * run on the main/ui thread, so you it's safe to update ui
     * components from it. (this is the correct way to update ui
     * components.)
     */
    @Override
    protected void onPostExecute(Void param) {

        Log.i("we are here", "**************onPostExecute...***************");
        Log.i("we are here", "**************onPostExecute...***************");

        Log.i("we are here", "add conge()");
        p.dismiss();

    }

    @Override
    protected void onCancelled() {
        super.onCancelled();
        p.dismiss();
        Log.i("we are here", "**************onCancelled...***************");

    }
}

I have two function the first is getSoldeConge(); which fetch some data with retrofit and the second will be exexuted when the second finised Log.i("we are here", "add conge()"); but in my case the second function will run bofore the first fuction finished.

Answer 1

Retrofit calls are already done in a background thread, so you don't need to call them from an Asynctask . We'll need to see the Retrofit code to help you any further.

By the way, you shouldn't be using AsyncTask in 2020. If you're going to stick with Java, use RXJava. Or ExecutorService .