由网友(向前走别回头)分享简介：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.I have some problem with radio gro...
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.
I have some problem with radio group, I am new to Android development so I don't have much idea to how can handle it.This is form which has some input filed and radio group for choosing gender and save button. but I don't know where can I exactly put my radiogroup setoncheakchangelistener? so it gives me errors.
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_width="match_parent"
android:layout_height="match_parent"
android:background="@drawable/backgroundmain"
android:orientation="vertical" >
<RelativeLayout
android:id="@+id/personinformation"
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="1.98" >
<EditText
android:id="@+id/heighttext"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
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_width="wrap_content"
android:layout_height="wrap_content"
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_width="wrap_content"
android:layout_height="wrap_content"
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_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignLeft="@+id/weighttext"
android:layout_below="@+id/weighttext"
android:ems="10"
android:hint="Enter Your Age" >
<requestFocus />
</EditText>
</RelativeLayout>
<View
android:layout_width="250dp"
android:layout_height="1dip"
android:layout_gravity="center"
android:layout_marginTop="20dp"
android:background="#aaa" />
<RelativeLayout
android:id="@+id/choosegender"
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="0.78" >
<TextView
android:id="@+id/choosefemaleormale"
android:layout_width="match_parent"
android:layout_height="30dip"
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_width="220dip"
android:layout_height="wrap_content"
android:layout_below="@+id/choosefemaleormale"
android:layout_centerHorizontal="true"
android:orientation="horizontal" >
<RadioButton
android:id="@+id/femaleselected"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_gravity="left"
android:layout_weight="1"
android:checked="true"
android:text="female"
android:onClick="onRadioButtonClicked"
/>
<RadioButton
android:id="@+id/maleselected"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_gravity="right"
android:layout_weight="1"
android:text="male"
android:onClick="onRadioButtonClicked" />
</RadioGroup>
</RelativeLayout>
<View
android:layout_width="250dp"
android:layout_height="1dip"
android:layout_gravity="center"
android:layout_marginTop="20dp"
android:background="#aaa" />
<RelativeLayout
android:id="@+id/choosepa"
android:layout_width="250dip"
android:layout_height="0dp"
android:layout_weight="1"
android:layout_gravity="center" >
<Spinner
android:id="@+id/chooseactivity"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
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_width="90dp"
android:layout_height="0dp"
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>
推荐答案
问题是你的单选按钮试图在你的主要活动中引用 onRadioButtonClicked 方法.但是您没有指定该方法.请记住，如果您使用的是 android:onClick，则不应在 Main 活动中使用 setOnCheckedChangeListener，反之亦然.
The thing is that your radio buttons trying to refer the onRadioButtonClicked method in your main activity. But you didnt specify that method. Remember, if you're using android:onClick you should not use setOnCheckedChangeListener in your Main activity and vice versa.
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