java - Android Studio 中单选按钮 onClick() 的替代选项

Question

我一直在尝试使用 RadioGroups 为每个有 4 个选项的问题制作一个测验应用程序。我已经制作了应用程序，通过维护所选正确和错误答案的指针来计算用户的分数。例如，在我的第一个 Activity 中，有 8 个问题，每个问题都有其答案的 RadioGroup。如果用户选择了正确的选项，则正确答案的指针会增加，对于错误答案也会发生同样的情况。最后，计算该 Activity 的最终分数并用于下一个 Activity 。

整个MainActivity的代码:

package com.example.myapplicationthreesubjectquiz;

import androidx.appcompat.app.AppCompatActivity;

import android.content.Intent;
import android.os.Bundle;
import android.os.strictmode.WebViewMethodCalledOnWrongThreadViolation;
import android.view.View;
import android.widget.Button;
import android.widget.RadioButton;
import android.widget.RadioGroup;
import android.widget.Toast;

public class MainActivity extends AppCompatActivity {

    public int correctAnsBio=0, wrongAnsBio=0;
    public RadioGroup rgbq1, rgbq2, rgbq3, rgbq4, rgbq5, rgbq6, rgbq7, rgbq8;
    public RadioButton rbbq1, rbbq2, rbbq3, rbbq4, rbbq5, rbbq6, rbbq7, rbbq8;
    public int corbq1, corbq2, corbq3, corbq4, corbq5, corbq6, corbq7, corbq8;

    Button moveToChemistry;

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

        rgbq1 = findViewById(R.id.rgbq1);
        rgbq2 = findViewById(R.id.rgbq2);
        rgbq3 = findViewById(R.id.rgbq3);
        rgbq4 = findViewById(R.id.rgbq4);
        rgbq5 = findViewById(R.id.rgbq5);
        rgbq6 = findViewById(R.id.rgbq6);
        rgbq7 = findViewById(R.id.rgbq7);
        rgbq8 = findViewById(R.id.rgbq8);

        moveToChemistry = findViewById(R.id.moveToChemistry);

        corbq1 = 1;
        corbq2 = 1;
        corbq3 = 1;
        corbq4 = 1;
        corbq5 = 1;
        corbq6 = 1;
        corbq7 = 1;
        corbq8 = 1;



        moveToChemistry.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                final int scoreInBio = (4*correctAnsBio)+((-1)*wrongAnsBio);
                Intent intent = new Intent(MainActivity.this, com.example.myapplicationthreesubjectquiz.chemistry.class);
                intent.putExtra("bioScore", scoreInBio);
                startActivity(intent);

            }
        });


    }

    public void clickedBq1(View v){

        int selected = -1;

        switch(rgbq1.getCheckedRadioButtonId())
        {
            case R.id.rbbq1o1:
                selected = 1;
                break;
            case R.id.rbbq1o2:
                selected = 2;
                break;
            case R.id.rbbq1o3:
                selected = 3;
                break;
            case R.id.rbbq1o4:
                selected = 4;
                break;
        }

        if(selected == corbq1)
        {
            correctAnsBio++;
        }
        else if(selected >0 && selected != corbq1)
        {
            wrongAnsBio++;
        }


    }
    public void clickedBq2(View v){

        int selected = -1;

        switch(rgbq2.getCheckedRadioButtonId())
        {
            case R.id.rbbq2o1:
                selected = 1;
                break;
            case R.id.rbbq2o2:
                selected = 2;
                break;
            case R.id.rbbq2o3:
                selected = 3;
                break;
            case R.id.rbbq2o4:
                selected = 4;
                break;
        }

        if(selected == corbq2)
        {
            correctAnsBio++;
        }
        else if(selected >0 && selected != corbq2)
        {
            wrongAnsBio++;
        }

    }
    public void clickedBq3(View v){

        int selected = -1;

        switch(rgbq3.getCheckedRadioButtonId())
        {
            case R.id.rbbq3o1:
                selected = 1;
                break;
            case R.id.rbbq3o2:
                selected = 2;
                break;
            case R.id.rbbq3o3:
                selected = 3;
                break;
            case R.id.rbbq2o4:
                selected = 4;
                break;
        }

        if(selected == corbq3)
        {
            correctAnsBio++;
        }
        else if(selected >0 && selected != corbq3)
        {
            wrongAnsBio++;
        }

    }

    public void clickedBq4(View v){

        int selected = -1;

        switch(rgbq4.getCheckedRadioButtonId())
        {
            case R.id.rbbq4o1:
                selected = 1;
                break;
            case R.id.rbbq4o2:
                selected = 2;
                break;
            case R.id.rbbq4o3:
                selected = 3;
                break;
            case R.id.rbbq4o4:
                selected = 4;
                break;
        }

        if(selected == corbq4)
        {
            correctAnsBio++;
        }
        else if(selected >0 && selected != corbq4)
        {
            wrongAnsBio++;
        }

    }
    public void clickedBq5(View v){

        int selected = -1;

        switch(rgbq5.getCheckedRadioButtonId())
        {
            case R.id.rbbq5o1:
                selected = 1;
                break;
            case R.id.rbbq5o2:
                selected = 2;
                break;
            case R.id.rbbq5o3:
                selected = 3;
                break;
            case R.id.rbbq5o4:
                selected = 4;
                break;
        }

        if(selected == corbq5)
        {
            correctAnsBio++;
        }
        else if(selected >0 && selected != corbq5)
        {
            wrongAnsBio++;
        }

    }
    public void clickedBq6(View v){

        int selected = -1;

        switch(rgbq6.getCheckedRadioButtonId())
        {
            case R.id.rbbq6o1:
                selected = 1;
                break;
            case R.id.rbbq6o2:
                selected = 2;
                break;
            case R.id.rbbq6o3:
                selected = 3;
                break;
            case R.id.rbbq6o4:
                selected = 4;
                break;
        }

        if(selected == corbq6)
        {
            correctAnsBio++;
        }
        else if(selected >0 && selected != corbq6)
        {
            wrongAnsBio++;
        }

    }
    public void clickedBq7(View v){

        int selected = -1;

        switch(rgbq7.getCheckedRadioButtonId())
        {
            case R.id.rbbq7o1:
                selected = 1;
                break;
            case R.id.rbbq7o2:
                selected = 2;
                break;
            case R.id.rbbq7o3:
                selected = 3;
                break;
            case R.id.rbbq7o4:
                selected = 4;
                break;
        }

        if(selected == corbq7)
        {
            correctAnsBio++;
        }
        else if(selected >0 && selected != corbq7)
        {
            wrongAnsBio++;
        }

    }
    public void clickedBq8(View v){

        int selected = -1;

        switch(rgbq8.getCheckedRadioButtonId())
        {
            case R.id.rbbq8o1:
                selected = 1;
                break;
            case R.id.rbbq8o2:
                selected = 2;
                break;
            case R.id.rbbq8o3:
                selected = 3;
                break;
            case R.id.rbbq8o4:
                selected = 4;
                break;
        }

        if(selected == corbq8)
        {
            correctAnsBio++;
        }
        else if(selected >0 && selected != corbq8)
        {
            wrongAnsBio++;
        }

    }
}

现在的问题是，如果用户先选择了错误的选项，然后将其更改为正确的选项，则错误答案和正确答案的指针都会递增。我在 RadioButtons 的 XML 代码中使用了 onClick 属性。也许，必须有一些其他属性来仅显示获取最终选中选项的选项，而不是一次又一次地发生。

以下是 XML 代码:

<RadioGroup
     android:id="@+id/rgbq1"
     android:layout_width="match_parent"
     android:layout_height="wrap_content"
     android:layout_marginLeft="14dp">

     <RadioButton
            android:id="@+id/rbbq1o1"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:buttonTint="@color/colorPrimary"
            android:onClick="clickedBq1"
            android:text="Option1"
            android:textColor="@color/colorPrimaryVariant"
            android:textSize="20sp" />

Answer 1

您可以添加单选按钮更改监听器

RadioGroup radioGroup = (RadioGroup) findViewById(R.id.RadioGroup);        
radioGroup.setOnCheckedChangeListener(new OnCheckedChangeListener() 
{
    @Override
    public void onCheckedChanged(RadioGroup group, int checkedId) {
        // checkedId is the RadioButton selected
    }
})

或在单击下一个按钮时选择单选按钮。像下面这样

    next.setOnClickListener(new OnClickListener(View v){
        String value =
            ((RadioButton)findViewById(rg.getCheckedRadioButtonId()))
            .getText().toString();
          // here you can compare the selected answer is  correct or not     
     });