Reputation: 484

Android I cannot uncheck initial RadioButton

I cannot uncheck initial radiobutton after setting default checked button.

Problem situation :: XML Code

<RadioGroup
    android:id="@+id/stateRadioGroup"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_marginEnd="8dp"
    android:layout_marginStart="8dp"
    android:layout_marginTop="16dp"
    android:orientation="horizontal"
    app:layout_constraintEnd_toEndOf="parent"
    app:layout_constraintHorizontal_bias="0.502"
    app:layout_constraintStart_toStartOf="parent"
    app:layout_constraintTop_toTopOf="parent">

    <RadioButton
        android:id="@+id/attendanceRadioButton"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_weight="1"
        android:text="School"
        android:textSize="18sp" />

    <RadioButton
        android:id="@+id/hometimeRadioButton"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_weight="1"
        android:text="Home"
        android:textSize="18sp" />

</RadioGroup>

Problem situation :: Initial state -> Works well

Problem situation :: When I touch Home button......

I cannot understand why it happened. I already read this article from stackoverflow. But it is not helpful to me and also too old post.

What I tried to solve

Removing 1 line in XML

I remove the line, android:checkedButton="@+id/attendanceRadioButton" I works well. (I mean never both buttons are clicked simultaneously) But there is no default checked button. So this is not what I want.

Adding codes in onCreateView()

I already add 2 lines in onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) But not helpful. (Actually these views are on Fragment.)

stateRadioGroup.clearCheck();
attendanceRadioButton.setChecked(true);

Same results as above images.

My Android studio System(Config)

Android Studio : 3.0.1
Gradle : 4.1
compileSdkVersion : 27
minSdkVersion : 21
targetSdkVersion : 23
Running Device : LG V10, Android 7.0

==============

I think I found real possible reason

I made new Project for solving this problem. I think this problem has a relationship with Fragment. But I don't know how to solve this. So, please help me :(

In this situation, Upper situation is happened.

There is MainActivity and RadioButtonFragment and I will inflate Fragment in RadioButtonFragment from MainActivity like below codes.

activity_main.xml

<android.support.constraint.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"
    tools:context="Your Package Name">

    <fragment
        android:id="@+id/fragmentLayout"
        android:layout_width="0dp"
        android:layout_height="0dp"
        android:name="io.github.tyeolrik.testradiobutton.RadioButtonFragment"
        android:layout_marginBottom="8dp"
        android:layout_marginEnd="8dp"
        android:layout_marginStart="8dp"
        android:layout_marginTop="8dp"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent" />

</android.support.constraint.ConstraintLayout>

MainActivity.java

protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    FragmentManager fm = getFragmentManager();
    FragmentTransaction fragmentTransaction = fm.beginTransaction();
    fragmentTransaction.add(R.id.fragmentLayout, new RadioButtonFragment());
    fragmentTransaction.commit();

    setContentView(R.layout.activity_main);
}

fragment_radio_button.xml

<!-- Of course there is ConstraintLayout which wraps RadioGroup -->
<RadioGroup
    android:id="@+id/buttonGroup"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_marginEnd="8dp"
    android:layout_marginStart="8dp"
    android:layout_marginTop="8dp"
    android:checkedButton="@+id/button1"
    app:layout_constraintEnd_toEndOf="parent"
    app:layout_constraintStart_toStartOf="parent"
    app:layout_constraintTop_toTopOf="parent">

    <RadioButton
        android:id="@+id/button1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_weight="1"
        android:text="School" />

    <RadioButton
        android:id="@+id/button2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_weight="1"
        android:text="Home" />
</RadioGroup>

RadioButtonFragment.java

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
                         Bundle savedInstanceState) {
    // Inflate the layout for this fragment
    View view = inflater.inflate(R.layout.fragment_radio_button, container, false);

    return view;
}

Problem explain

It works well when I just make a RadioGroup and some RadioButtons in Activity. But, in that case, making RadioButtons in Fragment, two buttons checking problem is happened.

Is there any idea to solve this?

What I import.

Not android.support.v4.app.Fragment But android.app.Fragment

In MainActivity.java

import android.app.FragmentManager;
import android.app.FragmentTransaction;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;

In RadioButtonFragment.java

import android.app.Fragment;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.RadioButton;
import android.widget.RadioGroup;

Upvotes: 1