按下时按钮颜色会发生变化，但是当我进行下一次迭代时，按钮颜色不会变为默认背景颜色

Question

I'm very new to the android app development. Currently I'm doing simple android quiz app with 10 questions.

My default options button color is white. When user is answered a question out of three options, i want to show them the selected option by changing the option button color( by using setBackground color in setOnClickListener method).

But my problem is, My first question selected option color is coming to second question also without selecting answer. I dont know how to cancel the background color on each iteration.

Thanks in Advance!!!

    Option1.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {

            selected_option = 0;
            question_id = 1;
            Option1.setBackgroundColor(R.color.Yellow);
            updateSelectedAnswer(selected_option, question_id);
        }
    });

Answer 1

We can define ColorStateList resource .

You can do it using as below (feel free to change color according to your need):

Create a file in res/color/button_background_selector.xml :

<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
    <item android:state_pressed="true"
          android:color="@android:color/red" /> <!-- pressed -->
    <item android:state_focused="true"
          android:color="@android:color/blue" /> <!-- focused -->
    <item android:state_hovered="true"
          android:color="@android:color/green" /> <!-- hovered -->
    <item android:color="@android:color/yellow" /> <!-- default -->
</selector>

Then, use it as below:

<Button
    ...
    android:background="@color/button_background_selector" />

Answer 2

当您在显示下一个问题之前更改按钮的颜色时，如下代码所示... Option1.setBackgroundColor(R.color.white);