Question

我正在开发一个测验应用并遇到一个基本问题，我想实现一个复选框，如果两个答案都正确，分数应该更新，我不知道将代码放在java中的哪个位置。< / p>

基本上这是应用程序应该如何工作，总问题5，每个带2个标记，3个MCQ，其中一个是正确的，第4个问题，两个答案都是正确的，所以我们添加复选框，每个复选框带一个标记，然后是editText字段，以便用户可以在用户回答完所有问题后添加自己的评论，然后只有在点击提交按钮后，才会向用户显示分数！
谢谢

我想知道如何使用复选框更新分数

此处的MainActivity.java文件

package com.example.android.quizatlast;

import android.content.Context;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.CheckBox;
import android.widget.TextView;
import android.widget.Toast;

public class MainActivity extends AppCompatActivity {
    int Totalscore = 0;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        //toasts , onclick , and distroying buttons for next time


        final Button buttononeone = (Button) findViewById(R.id.Button1_1);
        final Button buttononetwo = (Button) findViewById(R.id.Button1_2);

        buttononeone.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                int score = 2;
                Totalscore = Totalscore + score;
                Score(Totalscore);
                buttononeone.setEnabled(false);
                buttononetwo.setEnabled(false);

            }
        });
        buttononetwo.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Context context = getApplicationContext();
                CharSequence text = "Ahh,Wait for the score";
                int duration = Toast.LENGTH_SHORT;

                Toast toast = Toast.makeText(context, text, duration);
                toast.show();

                buttononetwo.setEnabled(false);
                buttononeone.setEnabled(false);
            }
        });

        final Button buttontwoone = (Button) findViewById(R.id.Button2_1);
        final Button buttontwotwo = (Button) findViewById(R.id.Button2_2);

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

                Context context = getApplicationContext();
                CharSequence text = "Dehli,City you should must visit";
                int duration = Toast.LENGTH_SHORT;

                Toast toast = Toast.makeText(context, text, duration);
                toast.show();
                buttontwoone.setEnabled(false);
                buttontwotwo.setEnabled(false);

            }
        });

        buttontwotwo.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                int score = 2;

                Totalscore = Totalscore + score;
                Score(Totalscore);

                Context context = getApplicationContext();
                CharSequence text = "Ahh,mumbai is  a beautiful place";
                int duration = Toast.LENGTH_SHORT;

                Toast toast = Toast.makeText(context, text, duration);
                toast.show();
                buttontwotwo.setEnabled(false);
                buttontwoone.setEnabled(false);

            }
        });

        final Button buttonthreeone = (Button) findViewById(R.id.Button3_1);
        final Button buttonthreetwo = (Button) findViewById(R.id.Button3_2);
        buttonthreeone.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                int score = 2;

                Totalscore = Totalscore + score;
                Score(Totalscore);
                Context context = getApplicationContext();
                CharSequence text = "Agra , wonders are waiting there for you";
                int duration = Toast.LENGTH_SHORT;

                Toast toast = Toast.makeText(context, text, duration);
                toast.show();
                buttonthreeone.setEnabled(false);
                buttonthreetwo.setEnabled(false);
            }
        });

                //PROBLEM HERE

        CheckBox checkBoxfourone = (CheckBox) findViewById(R.id.Checkbox4_1);
        boolean check4_1 = checkBoxfourone.isChecked();
        CheckBox checkBoxfourtwo = (CheckBox) findViewById(R.id.Checkbox4_2);
        boolean check4_2 = checkBoxfourtwo.isChecked();
        Score(Totalscore);
    }

    private int checkscore(boolean check4_1,boolean check4_2) {
        int score = Totalscore;
        if (check4_1) {
            Totalscore = Totalscore + 1;
        }
        if (check4_2) {
            Totalscore = Totalscore + 1;
        }
        return Totalscore;
    }

                //TILL HERE
    public void Score(int score) {

        TextView scoreView = (TextView) findViewById(R.id.score);
        scoreView.setText(String.valueOf(score));
    }public void reset(View view){
        Score(Totalscore = 0);
    }
}

activity_main.xml中

    <?xml version="1.0" encoding="utf-8"?>
<ScrollView
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto">

<LinearLayout
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:layout_margin="8dp"
    android:orientation="vertical"
    tools:context="com.example.android.justjava.MainActivity">

        <LinearLayout
            android:id="@+id/topping"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:orientation="vertical">
            <EditText
                android:id="@+id/Name_view"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:hint="Name"
                android:inputType="textCapCharacters" />
            <EditText
                android:id="@+id/Email_view"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:hint="Email"
                android:inputType="textCapCharacters" />
            <TextView
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_marginBottom="8dp"
                android:text="Toppings"
                android:textSize="16sp"
                android:textAllCaps="true"/>
            <CheckBox
                android:id="@+id/checkbox"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="Whipped Cream"
                android:paddingLeft="24dp"
                android:textSize="16sp"
                android:layout_marginBottom="8dp"/>
            <CheckBox
                android:id="@+id/chocolate_checkbox"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="Chocolate"
                android:paddingLeft="24dp"
                android:textSize="16sp"
                android:layout_marginBottom="8dp"/>
        </LinearLayout>
        <TextView
            android:id="@+id/text_view"
            android:layout_below="@id/topping"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginBottom="8dp"
            android:text="quantity!"
            android:textAllCaps="true"
            android:textSize="16sp" />
        <LinearLayout
            android:id="@+id/linear"
            android:layout_below="@id/text_view"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:orientation="horizontal"
            >   <Button
            android:onClick="decrement"        android:id="@+id/decrement"
            android:layout_below="@id/quantity_text_view"
            android:layout_width="48dp"
            android:layout_height="48dp"
            android:text="-"
            android:layout_marginBottom="8dp"/>


            <TextView
                android:layout_marginLeft="8dp"
                android:id="@+id/quantity_text_view"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_marginBottom="8dp"
                android:layout_below="@id/increment"
                android:text="0"
                android:textColor="#000"
                android:layout_marginRight="8dp"
                android:textSize="24sp" />
            <Button
                android:onClick="increment"
                android:id="@+id/increment"
                android:layout_below="@id/text_view"
                android:layout_width="48dp"
                android:layout_height="48dp"
                android:text="+"
                android:layout_marginBottom="8dp"/>

        </LinearLayout>

        <TextView
            android:id="@+id/order_summary"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_below="@id/linear"
            android:layout_marginBottom="8dp"
            android:text="order summary"
            android:textAllCaps="true"
            android:textSize="16sp" />

        <TextView
            android:id="@+id/order_summary_text_view"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_below="@id/order_summary"
            android:layout_marginBottom="8dp"
            android:textSize="24sp" />

        <Button
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_below="@id/order_summary_text_view"
            android:onClick="submitOrder"
            android:text="order" />


    </LinearLayout>
</ScrollView>

Answer 1

如果您只想在点击提交按钮后计算得分，只需将isChecked()代码移到您的submitOrder方法中，这样只有在用户点击提交按钮后，我们才会检查是否有复选框是否被选中。

如果您想实时更新分数，请按照Rahul Chaudhary的回答，选中两个复选框后禁用两者。

Answer 2

将这段代码放在复选框初始化

下面

checkBoxfourone.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {

   @Override
   public void onCheckedChanged(CompoundButton buttonView,boolean isChecked) {

   }

} ）;

和第二个复选框相同或实现CompoundButton.OnCheckedChangeListener，你的MainActivity看起来像这样

class MainActivity extends AppCompatActivity implements CompoundButton.OnCheckedChangeListener {


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

//你的旧代码在这里

    checkBoxfourtwo.setOnCheckedChangeListener(this);
    checkBoxfourone.setOnCheckedChangeListener(this);
}


@Override
public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
    switch (buttonView.getId()) {
        // to do here
    }

}

}

Answer 3

当您按下提交按钮时，从复选框中选中所有选中的值使用验证

checkValidation(){
    if(checkbox1.equal(correct anwser1) && checkbox2.equal(correct anwser2) 
    ) 
           {
       return true
         }else{
     return false
        }}

并签入提交

   submit.setOnclick(new.....
       onclick(){
       if( checkValidation()){
      Toast(answer is right)
       }else{
    Toast(answer is wrong)
   }
    }

）

不知道在MainActivity.java

3 个答案: