如果已经发布了答案,我深表歉意,但我已经寻找了很长时间,找不到合适的答案。

我有四个单选按钮,并且要根据从输入数据(从编辑文本)中选择的哪个来进行不同的计算。我也有一个按钮可以按下以开始计算。

整个过程与单选按钮不同。我知道我需要使用switch / case命令,但是我不确定是否需要设置它。

我已经在主要活动java类中尝试了以下方法:

package com.minichanic.idealgas;

import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
import android.widget.RadioButton;
import android.widget.RadioGroup;


public class MainActivity extends Activity implements android.view.View.OnClickListener{
    Button add, subtract, multiply, divide, mod;
    EditText pressin, volin, molin, tempin;
    RadioButton radio0, radio1, radio2, radio3;
    RadioGroup RadioGroup1;
    private int variable;

    /** Called when the activity is first created  */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        RadioGroup1 = (RadioGroup) findViewById(R.id.radioGroup1);

        // Reference TextViews and Buttons

        pressin = (EditText) findViewById(R.id.editText1);
        volin = (EditText) findViewById(R.id.editText2);
        molin = (EditText) findViewById(R.id.editText3);
        tempin = (EditText) findViewById(R.id.editText4);
        add = (Button) findViewById(R.id.button1);


        // Set listeners for when buttons are pressed
        add.setOnClickListener(this);


    }

    /**
     * Switch statement to decide which button was pressed droidacid.com
     */
    public void onClick(View arg0) {
        // Get values from EditTexts
        double pressure = Double.parseDouble(pressin.getText().toString());
        double volume = Double.parseDouble(volin.getText().toString());
        double moles = Double.parseDouble(molin.getText().toString());
        double temperature = Double.parseDouble(tempin.getText().toString());


          // Perform relevant operations depending on radio button
          // Check which radio button was clicked


        switch(variable){
                 case R.id.radio0:
                pressure = ((moles * 8.31* temperature)/volume);
                break;
                 case R.id.radio1:
                        volume = ((moles * 8.31* temperature)/pressure);
                        break;
                 case R.id.radio2:
                    moles = ((pressure * volume) /  (temperature * 8.31));
                        break;
                 case R.id.radio3:
                    temperature = ((pressure * volume) /  (moles * 8.31));
                        break;



            }

        // Add result to Running total stored in output TextView
        String tempresult = ""+temperature;
        TextView tresult = (EditText) findViewById(R.id.editText4);
        tresult.setText(tempresult);
        String pressresult = ""+pressure;
        TextView presult = (EditText) findViewById(R.id.editText1);
        presult.setText(pressresult);
        String molresult = ""+moles;
        TextView mresult = (EditText) findViewById(R.id.editText3);
        mresult.setText(molresult);
        String volresult = ""+volume;
        TextView vresult = (EditText) findViewById(R.id.editText2);
        vresult.setText(volresult);


    }

}


xml布局包含:
    

    <RadioButton
        android:id="@+id/radio0"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:checked="true"
        android:text="@string/pressure" />

    <RadioButton
        android:id="@+id/radio1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="@string/vol" />

    <RadioButton
        android:id="@+id/radio2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="@string/mol" />

    <RadioButton
        android:id="@+id/radio3"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="@string/temp" />
</RadioGroup>


一切正常,直到我开始介绍单选按钮,现在它崩溃了。
非常感谢您的任何想法。

最佳答案

我将其发布为另一个答案,因为评论时间太长。

为每个单选按钮设置android:onClick="onRadioButtonClicked"

<RadioButton
        android:id="@+id/radio0"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:checked="true"
        android:text="@string/pressure"

        android:onClick="onRadioButtonClicked"

 />
...


在存储当前所选单选按钮的位置创建本地变量,并将其设置为默认单选按钮

...
View selectedRadio;
...
public void onCreate(Bundle savedInstanceState) {
    ...
    selectedRadio = findViewById(R.id.radio0);
    ...
}
...


创建方法onRadioButtonClicked,将在单击指定的单选按钮并将我们的变量selectedRadio设置为当前选定的单选按钮后调用

public void onRadioButtonClicked(View view) {
    selectedRadio = view;
}


然后调整您的onClick方法以执行计算

public void onClick(View arg0) {
    ...
    switch(selectedRadio.getId()) {
        case R.id.radio0:
            // your code
            break;
        case R.id.radio1:
            // another code
            break;
        ...
    }
    ...
}


希望这对您有帮助。没有测试此代码,但应该可以工作。

10-04 22:44
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