广播组 setOnCheckedChangeListener

Posted 2023-03-05

【中文标题】广播组 setOnCheckedChangeListener

【英文标题】：radio group setOnCheckedChangeListener

【发布时间】：2014-09-25 22:50:03

【问题描述】：

我对无线电组有一些问题，我是 android 开发的新手，所以我不知道如何处理它。这个表格有一些输入字段和无线电组，用于选择性别和保存按钮。 但我不知道我可以把我的无线电组 setoncheakchangelistener 放在哪里？所以它给了我错误。

主要活动：

package com.dietandroidproject;

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


public class MainActivity extends Activity 

  @Override
  protected void onCreate(Bundle savedInstanceState) 
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    final RadioGroup genderselected = (RadioGroup) findViewById(R.id.selectgender);

    genderselected.setOnCheckedChangeListener(new RadioGroup.OnCheckedChangeListener()            

        @Override
        public void onCheckedChanged(RadioGroup arg0, int selectedId) 
            selectedId=genderselected.getCheckedRadioButtonId();
            RadioButton genderchoosed = (RadioButton) findViewById(selectedId);
            String gender = genderchoosed.getText().toString();

        
     );

    Button saveinformation = (Button) findViewById(R.id.saveinformation);
    saveinformation.setOnClickListener(new View.OnClickListener() 

        EditText weighttext = (EditText) findViewById(R.id.weighttext);
        EditText heighttext = (EditText) findViewById(R.id.heighttext);
        EditText usernametext = (EditText) findViewById(R.id.usernametext);
        EditText agetext = (EditText) findViewById(R.id.agetext);
        Spinner activitytext = (Spinner) findViewById(R.id.chooseactivity);
        Button saveinformation = (Button) findViewById(R.id.saveinformation);
        String pa = activitytext.getSelectedItem().toString();
         @Override
        public void onClick(View v) 

            int weight = (int) Float.parseFloat(weighttext.getText()
                    .toString());
            int height = (int) Float.parseFloat(heighttext.getText()
                    .toString());
            String username = usernametext.getText().toString();
            int age = (int) Float.parseFloat(agetext.getText().toString());
            TextView genderchoosed = (TextView) findViewById(genderselected
                    .getCheckedRadioButtonId());
            String gender = genderchoosed.getText().toString();
            String pa = activitytext.getSelectedItem().toString();

       //BMI==========================================================
            int Bmivalue = calculateBMI(weight, height);
            String bmiInterpretation = interpretBMI(Bmivalue);
            float idealweight = idealweight(weight, height, gender, pa, age);
            double dailycalories=dailycalories(weight,height,gender,pa,age);

         //insert data in to db===================================================
           Person person = new Person();
            person.setUsername(username);
            person.setHeight(height);
            person.setWeight(weight);
            person.setAge(age);
            person.setGender(gender);
            person.setPa(pa);
            person.setBmivalue(Bmivalue);
            person.setBmiInterpretation(bmiInterpretation);
            person.setIdealweight(idealweight);
            person.setDailycalories(dailycalories);
            Databasedata.DatabaseAdapter dbAdapter = new Databasedata.DatabaseAdapter(
                    MainActivity.this);
            dbAdapter.insertPerson(person);

            Toast.makeText(getApplicationContext(),
                    Bmivalue + "and you are" + bmiInterpretation,
                    Toast.LENGTH_LONG).show();

           
         );
        
        //BMI FUNCTION===============================================
        private int calculateBMI(int weight, int height) 

           return (int) (weight / (height * height));
        ;

        private String interpretBMI(int Bmivalue) 

         if (Bmivalue < 18.5) 
          return "Underweight";
          else if (Bmivalue < 25) 
           return "Normal";
          else if (Bmivalue < 30) 
           return "Overweight";
          else 
           return "Obese";
         
        
         //IDEAL WEIGHT========================================

private float idealweight(int weight, int height, String gender, String pa,
        int age) 
    float x = (float) 0.0;
    int bmi;

    bmi = idealbmi(age);
    x = bmi * (height * height);
    return x;

  

   public int idealbmi(int age) 
    int bmi = 0;
    if (age > 17 && age <= 19) 
        bmi = 21;
    
    if (age > 19 && age <= 24) 
        bmi = 22;
    
    if (age > 24 && age <= 34) 
        bmi = 23;
    
    if (age > 34 && age <= 44) 
        bmi = 24;
    
    if (age > 44 && age <= 54) 
        bmi = 25;
    
    if (age > 54 && age <= 64) 
        bmi = 26;
    
    if (age > 64) 
        bmi = 27;
    

    return bmi;
    
    //DAILY CALORIES===============================================
    public double suitablepa(String pa) 
    double suitablepa = 0;
    if (pa.equals("Highly active")) 
        suitablepa =  1.48;
    
    if (pa.equals("Active")) 
        suitablepa =  1.25;
    
    if (pa.equals("Low activity")) 
        suitablepa =  1.11;
    
    if (pa.equals("Sedentary")) 
        suitablepa =  1;
    
    return suitablepa;

  

  private double dailycalories(int weight, int height, String gender,
        String pa, int age) 
    double dailycalori = 0;
    double i;
    double j;
    double h;
    double k;
    if(gender.equals("femaleselected"))

        i=9.36*weight;
        j=726*height;
        h=suitablepa(pa)*(i+j);
        k=6.91*age;
        dailycalori=354-k+h;

    else if(gender.equals("maleselected"))

        i=15.91*weight;
        j=539.6*height;
        h=suitablepa(pa)*(i+j);
        k=9.53*age;
        dailycalori=662-k+h;
    


    return dailycalori;

XML 代码

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_
android:layout_
android:background="@drawable/backgroundmain"
android:orientation="vertical" >

<RelativeLayout
    android:id="@+id/personinformation"
    android:layout_
    android:layout_
    android:layout_weight="1.98" >

    <EditText
        android:id="@+id/heighttext"
        android:layout_
        android:layout_
        android:layout_alignLeft="@+id/usernametext"
        android:layout_below="@+id/usernametext"
        android:ems="10"
        android:hint="Enter Your Height" >
    </EditText>

    <EditText
        android:id="@+id/usernametext"
        android:layout_
        android:layout_
        android:layout_alignParentTop="true"
        android:layout_centerHorizontal="true"
        android:layout_marginTop="20dp"
        android:ems="10"
        android:hint="Enter Username" />

    <EditText
        android:id="@+id/weighttext"
        android:layout_
        android:layout_
        android:layout_alignLeft="@+id/heighttext"
        android:layout_below="@+id/heighttext"
        android:ems="10"
        android:hint="Enter Your Weight" />

    <EditText
        android:id="@+id/agetext"
        android:layout_
        android:layout_
        android:layout_alignLeft="@+id/weighttext"
        android:layout_below="@+id/weighttext"
        android:ems="10"
        android:hint="Enter Your Age" >

        <requestFocus />
    </EditText>

</RelativeLayout>

<View
    android:layout_
    android:layout_
    android:layout_gravity="center"
    android:layout_marginTop="20dp"
    android:background="#aaa" />

<RelativeLayout
    android:id="@+id/choosegender"
    android:layout_
    android:layout_
    android:layout_weight="0.78" >

    <TextView
        android:id="@+id/choosefemaleormale"
        android:layout_
        android:layout_
        android:layout_alignParentLeft="true"
        android:layout_alignParentTop="true"
        android:layout_marginTop="10dip"
        android:gravity="center"
        android:text="Gender : "
        android:textAlignment="center"
        android:textColor="#555"
        android:textSize="19sp" />

    <RadioGroup
        android:id="@+id/selectgender"
        android:layout_
        android:layout_
        android:layout_below="@+id/choosefemaleormale"
        android:layout_centerHorizontal="true"
        android:orientation="horizontal" >

        <RadioButton
            android:id="@+id/femaleselected"
            android:layout_
            android:layout_
            android:layout_gravity="left"
            android:layout_weight="1"
            android:checked="true"
            android:text="female"
            android:onClick="onRadioButtonClicked"
             />

        <RadioButton
            android:id="@+id/maleselected"
            android:layout_
            android:layout_
            android:layout_gravity="right"
            android:layout_weight="1"
            android:text="male"
            android:onClick="onRadioButtonClicked" />
    </RadioGroup>
</RelativeLayout>
    <View
    android:layout_
    android:layout_
    android:layout_gravity="center"
    android:layout_marginTop="20dp"
    android:background="#aaa" />
<RelativeLayout
    android:id="@+id/choosepa"
    android:layout_
    android:layout_
    android:layout_weight="1"
    android:layout_gravity="center" >

    <Spinner
        android:id="@+id/chooseactivity"
        android:layout_
        android:layout_
        android:layout_alignParentLeft="true"
        android:layout_alignParentTop="true"
        android:entries="@array/activityitems"
        android:gravity="center"
        android:prompt="@string/level_of_activity" />

</RelativeLayout>

<Button
    android:layout_
    android:layout_
    android:layout_gravity="right"
    android:layout_marginBottom="10dip"
    android:layout_marginRight="20dp"
    android:layout_weight="0.46"
    android:background="@drawable/recent_foods_depressed"
    android:hint="save"
    android:text="save"
    android:textColor="#fff"
    android:textSize="20sp"
    android:textStyle="bold" 
    android:onClick="saveinformation"
    android:id="@+id/saveinformation"/>

 </LinearLayout>

【问题讨论】：

你得到什么错误？

@Sree14 致命异常 :main 08-03 06:22:57.169: E/AndroidRuntime(1188): java.lang.IllegalStateException: Could not find a method onRadioButtonClicked(View) in the activity class com.dietandroidproject.MainActivity for onClick handler on view class android.widget.RadioButton with id 'maleselected'

您是否尝试过将setOnCheckedChangeListener() 用于单选按钮而不是单选组。否则，您也可以尝试 android:onClick 为您的 xml 中的单选按钮。 developer.android.com/guide/topics/ui/controls/radiobutton.html

好的，知道了。请从 xml 中删除你的 android:onclick。

@Sree14 是的，起初我尝试使用 setOnCheckedChangeListener() 作为单选按钮，我也尝试了 [mkyong.com/android/android-radio-buttons-example/] 但没有答案。

【参考方案1】：

 radioGroup.setOnCheckedChangeListener(new RadioGroup.OnCheckedChangeListener()
    
        public void onCheckedChanged(RadioGroup group, int checkedId) 
            // checkedId is the RadioButton selected
            RadioButton rb=(RadioButton)findViewById(checkedId);
            Toast.makeText(getApplicationContext(), rb.getText(), Toast.LENGTH_SHORT).show();
        
    );

【讨论】：

你能帮我解决另一个问题吗？

当然，请在 cmets 框或 *** 中发布您的问题

我在更改操作栏的文本颜色时遇到了一些问题你可以在这里找到更多信息***.com/questions/26617694/…u

【参考方案2】：

RadioGroup yourRadioGroup = (RadioGroup) findViewById(R.id.radioGroup1);
        yourRadioGroup.setOnCheckedChangeListener(new OnCheckedChangeListener()
        
            @Override
            public void onCheckedChanged(RadioGroup group, int checkedId)
            
                switch(checkedId)
                
                case R.id.radio0:
                    // TODO Something
                    break;
                case R.id.radio1:
                    // TODO Something
                    break;
                case R.id.radio2:
                    // TODO Something
                    break;
                
            
        );

或者，如果您愿意：

yourRadioGroupName.setOnCheckedChangeListener(new RadioGroup.OnCheckedChangeListener()
        
            @Override
            public void onCheckedChanged(RadioGroup group, int checkedId)
            
                int idRadioButtonChosen = yourRadioGroupName.getCheckedRadioButtonId();

                if(idRadioButtonChosen > 0)

                    radioButtonChosen = (RadioButton) findViewById(idRadioButtonChosen);
                    textViewOnclick.setText(radioButtonChosen.getText());

                


            
        );

【参考方案3】：

问题是您的单选按钮试图在您的主要活动中引用onRadioButtonClicked 方法。但是您没有指定该方法。请记住，如果您使用 android:onClick，则不应在 Main 活动中使用 setOnCheckedChangeListener，反之亦然。

【参考方案4】：

在 kotlin 中你可以像下面这样使用..

  radioGroup.setOnCheckedChangeListener(RadioGroup.OnCheckedChangeListener  group, checkedId ->

          val radio:RadioButton = group.findViewById(checkedId)
          Log.e("selectedtext-->",radio.text.toString())

  )

或者

radioGroup.setOnCheckedChangeListener(RadioGroup.OnCheckedChangeListener  group, checkedId ->

         var selectedId = rg.checkedRadioButtonId
         val radio:RadioButton = group.findViewById(selectedId)
            Log.e("selectedtext-->",radio.text.toString())

   )