setText android studio

Question

screenshot of how it appearsSo i'm trying to create a quiz application on android but while working on it, i noticed that the setText i used to set first question and answers is not working, it would be great if you help me find out what's not working here. Notice that the problems occurs only when trying to set text programmatically

import androidx.appcompat.app.AppCompatActivity;
import android.os.Bundle;       
import android.view.View;
import android.widget.Button;
import android.widget.TextView;
public class Play extends AppCompatActivity {
private Button a1,a2,a3,a4;
private TextView question;
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_play);

    a1 = (Button)findViewById(R.id.a1);
    a2 = (Button)findViewById(R.id.a2);
    a3 = (Button)findViewById(R.id.a3);
    a4 = (Button)findViewById(R.id.a4);
    question = findViewById(R.id.question);
    question.setText("Pick");
    a1.setText("A");
    a2.setText("B");
    a3.setText("C");
    a4.setText("D");
}




<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout 
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@drawable/background"
tools:context=".Play">

<Button
    android:id="@+id/a2"
    android:layout_width="250dp"
    android:layout_height="50dp"
    android:layout_marginTop="30dp"
    android:text=""
    app:layout_constraintEnd_toEndOf="parent"
    app:layout_constraintHorizontal_bias="0.503"
    app:layout_constraintStart_toStartOf="parent"
    app:layout_constraintTop_toBottomOf="@+id/a1" />

<Button
    android:id="@+id/a3"
    android:layout_width="250dp"
    android:layout_height="50dp"
    android:layout_marginTop="30dp"
    android:text=""
    app:layout_constraintEnd_toEndOf="parent"
    app:layout_constraintStart_toStartOf="parent"
    app:layout_constraintTop_toBottomOf="@+id/a2"
/>

<Button
    android:id="@+id/a4"
    android:layout_width="250dp"
    android:layout_height="50dp"
    android:layout_marginTop="30dp"
    app:layout_constraintBottom_toBottomOf="parent"
    app:layout_constraintEnd_toEndOf="parent"
    app:layout_constraintHorizontal_bias="0.515"
    app:layout_constraintStart_toStartOf="parent"
    app:layout_constraintTop_toBottomOf="@+id/answer3"
    app:layout_constraintVertical_bias="0.0"
/>

<Button
    android:id="@+id/a1"
    android:layout_width="245dp"
    android:layout_height="50dp"
    android:text=""
    app:layout_constraintEnd_toEndOf="parent"
    app:layout_constraintStart_toStartOf="parent"
    app:layout_constraintTop_toBottomOf="@+id/question"
/>

<TextView
    android:id="@+id/question"
    android:layout_width="364dp"
    android:layout_height="264dp"
    android:layout_marginTop="30dp"
    android:layout_marginBottom="30dp"
    android:text=""
    app:layout_constraintBottom_toTopOf="@+id/a1"
    app:layout_constraintEnd_toEndOf="parent"
    app:layout_constraintHorizontal_bias="0.487"
    app:layout_constraintStart_toStartOf="parent"
    app:layout_constraintTop_toTopOf="parent"
/>

i added in post a screenshot of what i get when i run it, the buttons and text view are blank — Demha, Jun 16 '20 at 02:09
i think there is no error. just you have to rearrange your layout. — Mahamudul Hasan, Jun 16 '20 at 02:13
Does this answer your question? [Android widget: How to change the text of a button](https://stackoverflow.com/questions/3851507/android-widget-how-to-change-the-text-of-a-button) — Amer Alahmar, Jun 16 '20 at 02:14
I saw this post too, i made the code as simple as possible to track the problem but still get nothing, buttons' text is still blank. Thanks anyway — Demha, Jun 16 '20 at 02:22
Any error logs? Btw, you can reference this post: https://stackoverflow.com/questions/24925766/updating-textview-in-oncreate — Kai Pham, Jun 16 '20 at 03:01

score 1 · Answer 1 · answered Jun 17 '20 at 05:49

I have tested your code, its showing result as expected. Try to change text color of your button text. or by setting background color of your views to check which view is appearing first. Sometimes code is working but due to some view over other, it does not reflect output

score 0 · Answer 2 · answered Jun 16 '20 at 02:17

0

Try to add

import android.widget.View;

at the top of your java file.

Android widget: How to change the text of a button

answered Jun 16 '20 at 02:17

prushh

21
3

Hi, i added it but still no change. I checked that post too and my code looks ok compared to what's there, weird. – Demha Jun 16 '20 at 02:24
It have no sense but if you declare Button inside onCreate inline? Button a1 = etc.. – prushh Jun 16 '20 at 02:32
i did that too, but it makes no change – Demha Jun 16 '20 at 02:39
Check if findViewById method works fine (implement onClick). Are there some errors in Logcat? – prushh Jun 16 '20 at 02:46
yeah, i think there's a problem with my findViewById implemented an onClick an app close whenever i click – Demha Jun 16 '20 at 03:12
Can you share Logcat screen? – prushh Jun 16 '20 at 06:32

setText android studio

2 Answers2