Android RadioButton使用

例题2-12

activity_main.xml代码

 1 <?xml version="1.0" encoding="utf-8"?>
 2 <GridLayout android:layout_width="fill_parent"
 3     android:layout_height="fill_parent"
 4     android:columnCount="4"
 5     android:rowCount="6"
 6     xmlns:android="http://schemas.android.com/apk/res/android">
 7     <RadioGroup>
 8         <RadioButton android:id="@+id/boy"
 9             android:layout_width="wrap_content"
10             android:layout_height="wrap_content"
11             android:checked="true"
12             android:text="男"/>
13         <RadioButton android:id="@+id/girl"
14             android:layout_width="wrap_content"
15             android:layout_height="wrap_content"
16             android:text="女"/>
17     </RadioGroup>
18     <Button android:id="@+id/but1"
19         android:layout_width="wrap_content"
20         android:layout_height="wrap_content"
21         android:text="确认"
22         android:layout_columnSpan="4"/>
23     <TextView android:id="@+id/text1"
24         android:layout_height="wrap_content"
25         android:layout_width="wrap_content"
26         android:text="" />
27 </GridLayout>

mainactivity.java代码

 1 package com.example.hello;
 2 
 3 import androidx.appcompat.app.AppCompatActivity;
 4 
 5 import android.os.Bundle;
 6 import android.telephony.SmsManager;
 7 import android.view.View;
 8 import android.widget.Button;
 9 import android.widget.CheckBox;
10 import android.widget.ProgressBar;
11 import android.widget.RadioButton;
12 import android.widget.TextView;
13 
14 public class MainActivity extends AppCompatActivity {
15     Button but1;
16     TextView textView;
17     RadioButton radioButton1,radioButton2;
18     @Override
19     protected void onCreate(Bundle savedInstanceState) {
20         super.onCreate(savedInstanceState);
21         setContentView(R.layout.activity_main);
22         textView = (TextView)findViewById(R.id.text1);
23         but1 = (Button)findViewById(R.id.but1);
24         radioButton1 = (RadioButton)findViewById(R.id.boy);
25         radioButton2 = (RadioButton)findViewById(R.id.girl);
26         but1.setOnClickListener(new View.OnClickListener() {
27             @Override
28             public void onClick(View v) {
29                 String s="";
30                 if(radioButton1.isChecked())
31                     s=s+radioButton1.getText();
32                 if (radioButton2.isChecked())
33                     s=s+radioButton2.getText();
34                 textView.setText("性别："+s);
35             }
36         });
37 
38     }
39 
40 }