Questions tagged as 'android'

Tagged questions
1
answer

Problem with CheckBox and SQLite in Android Studio

It turns out that I have this class in which I keep the information of, among other things, 4 Checkboxes in my SQLite Database, but it does not matter if the Checkboxes are selected or not, I always load "No" in my database. data. To better u...
asked by 19.11.2018 / 21:13
1
answer

Add determined image to gridview

I'm doing a horoscope app, I did it with an adapter and I need to assign each image to the sign so that it remains in the grid. Can I add the image in the arraylist? or where and with what parameters? attached main activity and the adapter...
asked by 20.11.2018 / 18:55
1
answer

Error in Registration Android String can not be converted to JSONObject

I have a record in Android but when I hit the "Register Incidence" button, it generates the following error in the logcat: This is my RegisterIncidences: btnRegistrar.setOnClickListener(new View.OnClickListener() { @Ov...
asked by 22.11.2018 / 18:01
0
answers

Error Virtual Box Android Studio

At the beginning of the S.O in virtual box it seems to me an error and I have not found a way to solve it. Could someone help me? Or does anyone know what this error is about?     
asked by 28.05.2016 / 14:22
1
answer

FirebaseListAdapter, TextView inside populateView?

Why do not I see anything in the emulation with this code? I do not know how and where the TextView must be created to which the text 's' is set. I do not understand how it works, thank you. public class Cursos extends AppCompatActivity {...
asked by 24.05.2016 / 20:23
0
answers

Object reference not established as an instance of an object?

Good morning, I am developing an Android application that sends a Json to a Web API by POST, but returns an ExceptionType, System.NullReferenceException. The Android code is as follows: JSONObject jobject = new JSONObject(); jobject.put("Va...
asked by 13.07.2016 / 18:22
1
answer

because the videoview does not show me anything

This is the code but it does not show me anything but the app closes VideoView video; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); vi...
asked by 13.07.2016 / 22:32
1
answer

Obtain path of a selected image from the file browser

I need to obtain the path where the image is saved when the user selects the image, I have this code: // Llamada al explorador de archivos public void elegirFoto(View vista){ Intent intent = new Intent(Intent.ACTION_GET_CONTENT, MediaStore...
asked by 22.09.2018 / 16:12
1
answer

How to identify the values that Log.e brings on Android with Firebase

I have this structure in Firebase And I'm calling the last three data with the name "dose" with this structure my.child("usuario").orderByKey().limitToLast(3).addValueEventListener(new ValueEventListener() { @Override...
asked by 05.10.2018 / 00:29
3
answers

Unknown class when using TextInputLayout in MainActivity

use Android Studio 3 , I'm trying to do validation, in the first part according to a tutorial that I saw, this is done: package com.example.jhon.cesde5; import android.content.Intent; import android.sax.StartElementListener; import andr...
asked by 17.09.2018 / 07:23