Android 中的 RadioButton 和 RadioGroup 使用切换 feature/isChecked 并清理代码

Question

您好，我已经尝试了一段时间并研究了很多理论和堆栈答案。虽然我只是不知道如何将下面的代码用于一个简单的琐事应用程序，使用 RadioGroup 中的 RadioButton，然后在选中时添加一个来评分。问题是，如果您一直按正确答案，分数只会增加。如果答案改变点相应调整，我想应用某种类型的切换。

我也想清理这段代码，以免重复。使用新的 class 或方法。虽然我不知道如何实现它。

主要

package com.example.samuel.trivaapp;

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.CompoundButton;
import android.widget.CompoundButton.OnCheckedChangeListener;
import android.widget.RadioButton;
import android.widget.RadioGroup;
import android.widget.TextView;

public class MainActivity extends AppCompatActivity  {

    //Score keeper.
    private int score = 0;
    private int correct = 0;
    private int wrong = 0;
    // determines if the selected was right or wrong, then used to add up the score.
     boolean question1 = false;
     boolean question2 = false;
     boolean question3 = false;
//    private boolean question3 = false;
//    private boolean question4 = false;
//    private boolean question5 = false;
//    private boolean question6 = false;
//    private boolean question7 = false;


    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        RadioGroup rGroup1 = (RadioGroup) findViewById(R.id.first_question_group);

        RadioButton checkedRadioButton1 = (RadioButton) rGroup1.findViewById(rGroup1.getCheckedRadioButtonId());

        rGroup1.setOnCheckedChangeListener(new RadioGroup.OnCheckedChangeListener() {
            public void onCheckedChanged(RadioGroup group, int checkedId) {


                if (R.id.correct_answer1 == checkedId) {
                    question1 = true;

                } else {
                    question1 = false;

                }

            }

        });

        RadioGroup rGroup2 = (RadioGroup) findViewById(R.id.second_question_group);

        RadioButton checkedRadioButton2
                = (RadioButton) rGroup2.findViewById(rGroup2.getCheckedRadioButtonId());

        rGroup2.setOnCheckedChangeListener(new RadioGroup.OnCheckedChangeListener() {
            public void onCheckedChanged(RadioGroup group, int checkedId) {


                if (R.id.correct_answer2 == checkedId) {
                    question2 = true;

                } else {
                    question2 = false;

                }

            }

        });

        RadioGroup rGroup3 = (RadioGroup) findViewById(R.id.third_question_group);

        RadioButton checkedRadioButton3
                = (RadioButton) rGroup3.findViewById(rGroup3.getCheckedRadioButtonId());

        rGroup3.setOnCheckedChangeListener(new RadioGroup.OnCheckedChangeListener() {
            public void onCheckedChanged(RadioGroup group, int checkedId) {


                if (R.id.correct_answer3 == checkedId) {
                    question3 = true;

                } else {
                    question3 = false;

                }

            }

        });


    }
    //used to diplay the players previous score on screen.
    public void displayScore() {
        TextView scoreView = (TextView) findViewById(R.id.score_keeper);
        score = correct + wrong;
        scoreView.setText(Integer.toString(correct));

    }




    //used to submit results with button and tally score.
    public void submitResults(View view){

        question1();
        question2();
        question3();
        displayScore();
         score= 0;
         correct = 0;
         wrong = 0;
    }


    //selector for radioGroup1 check if id matches correct answer.

    //submit results calls this to find out if the answer was correct for question 1 to use for tally.
    public void question1() {
        if(question1) {
            correct++;
        } else {
            wrong--;
        }


    }




    //submit results calls this to find out if the answer was correct for question 2 to use for tally.
    public void question2() {
        if(question2) {
            correct++;
        } else {
            wrong--;
        }


    }



    //submit results calls this to find out if the answer was correct for question 3 to use for tally.
    public void question3() {
        if(question3) {
            correct++;
        } else {
            wrong--;
        }


    }



}

XML

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout 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="com.example.samuel.trivaapp.MainActivity">

    <TextView
        android:id="@+id/header_logo"
        android:layout_centerInParent="true"
        android:layout_alignParentTop="true"
        android:layout_margin="16dp"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Hello World!"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintRight_toRightOf="parent"
        app:layout_constraintTop_toTopOf="parent" />



    <EditText
        android:id="@+id/player_name"
        android:layout_below="@+id/header_logo"
        android:inputType="textCapWords"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:hint="@string/enter_player_name"
        android:layout_margin="8dp"/>

    <LinearLayout
        android:id="@+id/score_board"
        android:layout_below="@+id/player_name"
        android:orientation="horizontal"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        >

    <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="Score:"
            android:textStyle="bold"
        android:layout_marginLeft="8dp"
            />

    <TextView
        android:id="@+id/score_keeper"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="0"
        android:layout_marginLeft="8dp"/>

    </LinearLayout>



<!--questions scroll view.-->


    <ScrollView
        android:id="@+id/question_scroll_view"
        android:layout_margin="8dp"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_below="@+id/score_board">

        <RelativeLayout
            android:layout_width="wrap_content"
            android:layout_height="wrap_content">

        <LinearLayout
            android:id="@+id/test"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_marginBottom="16dp">

            <RadioGroup
                android:id="@+id/first_question_group"
                android:layout_width="match_parent"
                android:layout_height="match_parent"
                >


                <TextView
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:text="Is this question 1? "/>
                <RadioButton
                    android:id="@+id/correct_answer1"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:text="Answer 1" />
                <RadioButton
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:text="Answer 2" />
                <RadioButton
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:text="Answer 3" />

                <RadioButton
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:text="Answer 4" />


            </RadioGroup>


        </LinearLayout>


        <LinearLayout
            android:id="@+id/test2"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_below="@id/test"
            android:layout_marginBottom="16dp">

            <RadioGroup
                android:id="@+id/second_question_group"
                android:layout_width="match_parent"
                android:layout_height="match_parent"
                >


                <TextView
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:text="Is this question 2? "/>
                <RadioButton
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:text="Answer 1" />
                <RadioButton
                    android:id="@+id/correct_answer2"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:text="Answer 2" />
                <RadioButton
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:text="Answer 3" />

                <RadioButton
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:text="Answer 4" />


            </RadioGroup>


        </LinearLayout>


            <LinearLayout
                android:id="@+id/test3"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_below="@id/test2"
                android:layout_marginBottom="16dp">

                <RadioGroup
                    android:id="@+id/third_question_group"
                    android:layout_width="match_parent"
                    android:layout_height="match_parent"
                    >


                    <TextView
                        android:layout_width="wrap_content"
                        android:layout_height="wrap_content"
                        android:text="Is this question 3? "/>
                    <RadioButton
                        android:layout_width="wrap_content"
                        android:layout_height="wrap_content"
                        android:text="Answer 1" />
                    <RadioButton
                        android:layout_width="wrap_content"
                        android:layout_height="wrap_content"
                        android:text="Answer 2" />
                    <RadioButton
                        android:id="@+id/correct_answer3"
                        android:layout_width="wrap_content"
                        android:layout_height="wrap_content"
                        android:text="Answer 3" />

                    <RadioButton
                        android:layout_width="wrap_content"
                        android:layout_height="wrap_content"
                        android:text="Answer 4" />


                </RadioGroup>


            </LinearLayout>

            <Button
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="submit"
                android:onClick="submitResults"
                android:layout_below="@id/test3"
                android:layout_centerInParent="true"/>

        </RelativeLayout>


    </ScrollView>





</RelativeLayout>

Answer 1

好的，我相信我想出了我想做的事情。如果其他人有这个问题或类似的问题，使用多个 RadioGroups 我希望这会有所帮助。

https://github.com/raregamer/TrivaApp1/tree/trivia2/app/src/main/java/com/example/samuel/trivaapp

Android 中的 RadioButton 和 RadioGroup 使用切换 feature/isChecked 并清理代码

Issue with RadioButton with RadioGroup in Android using a toggle feature/isChecked and cleaning code up

java

android

android-radiobutton