Android - Wait For Volley Response For Continue

I build an app, that it load markers in a map, the markers I get it for volley JSON file, but I need that first to load volley, and after continue executing the code, because the o

Solution 1:

You would need to implement a call back for the volley response. A very simple way to do this would be the following.

Step 1: Create this interface

publicinterfaceVolleyCallBack {
    voidonSuccess();
}

Step 2: change your getMarkers() method to this:

publicvoidgetMarkers(final VolleyCallBack callBack){

requestQueue = Volley.newRequestQueue(getApplicationContext());
JsonObjectRequest jsonObjectRequest = newJsonObjectRequest(Request.Method.POST, url, newResponse.Listener<JSONObject>() {


    @OverridepublicvoidonResponse(JSONObject response) {

        try {

            JSONArray saagTracker = response.getJSONArray("saagMRK");
            for (int i = 0; i < saagTracker.length(); i++) {
                JSONObjectobject = saagTracker.getJSONObject(i);

                title = object.getString(TITLE);
                snnipet = object.getString(SNNIP);
                latLng = newLatLng(Double.parseDouble(object.getString(LAT)), Double.parseDouble(object.getString(LNG)));
                coor = coor + "|" + object.getString(LAT) + "," + object.getString(LNG);                        // Menambah data marker untuk di tampilkan ke google mapaddMarker(latLng, title, snnipet);

                callback.onSuccess();

            }

        } catch (JSONException e) {
            e.printStackTrace();
        }
        //JSONArray array = new JSONArray(response.body().string());

    }
}, newResponse.ErrorListener() {
    @OverridepublicvoidonErrorResponse(VolleyError error) {
        Toast.makeText(MainActivity.this, "Ocurrio un error", Toast.LENGTH_LONG).show();
    }
});
requestQueue.add(jsonObjectRequest);
}

Step 3: Call your getMarkers() method like this:

getMarkers(newVolleyCallBack() {

                @OverridepublicvoidonSuccess() {
                    // this is where you will call the geofire, here you have the response from the volley.
                    geoQuery = geofire.queryAtLocation(newGeoLocation(latLng.latitude, latLng.longitude),0.1f);
                });