Android——RadioGroup和CheckBox

Posted 2020-06-30 Chen_s

xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    tools:context="com.example.chenshuai.test322.UIActivity">
    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="请选择Android的开发语言是什么？"
        android:padding="10dp"/>

    <RadioGroup
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="horizontal"
        android:id="@+id/rg">

        <RadioButton
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="C++"
            android:id="@+id/rb1"
            android:layout_marginRight="30dp"
            android:checked="true"
            />
        <RadioButton
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="C"
            android:id="@+id/rb2"
            android:layout_marginRight="30dp"
            />
        <RadioButton
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="JAVA"
            android:id="@+id/rb3"
            android:layout_marginRight="30dp"
            />
        <RadioButton
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="C#"
            android:id="@+id/rb4"
            />
    </RadioGroup>

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="请选择字体效果："
        android:id="@+id/ziti"/>
    <CheckBox
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="宋体"
        android:checked="true"
        android:id="@+id/cb_song"/>
    <CheckBox
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="加粗"
        android:id="@+id/cb_cu"/>
    <CheckBox
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="斜体"
        android:id="@+id/cb_xie"/>
    <CheckBox
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="下划线"
        android:id="@+id/cb_xia"/>


</LinearLayout>

java

package com.example.chenshuai.test322;

import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.widget.CheckBox;
import android.widget.CompoundButton;
import android.widget.RadioButton;
import android.widget.RadioGroup;
import android.widget.Toast;

public class UIActivity extends AppCompatActivity {

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

        RadioGroup radioGroup = (RadioGroup)findViewById(R.id.rg);

        //radiogroup的监听事件 匿名内部类
        radioGroup.setOnCheckedChangeListener(new RadioGroup.OnCheckedChangeListener() {

            @Override
            public void onCheckedChanged(RadioGroup group, int checkedId) {

                RadioButton rb = (RadioButton) findViewById(checkedId);

                if (checkedId == R.id.rb3) {
                    Toast.makeText(UIActivity.this, "选对了", Toast.LENGTH_LONG).show();
                }
                Toast.makeText(UIActivity.this, rb.getText(), Toast.LENGTH_LONG).show();

            }
        });
        CheckBox cb_song = (CheckBox)findViewById(R.id.cb_song);
        cb_song.setOnCheckedChangeListener(new cboncheckedchangelistener());

        CheckBox cb_cu = (CheckBox)findViewById(R.id.cb_cu);
        cb_cu.setOnCheckedChangeListener(new cboncheckedchangelistener());

        CheckBox cb_xia = (CheckBox)findViewById(R.id.cb_xia);
        cb_xia.setOnCheckedChangeListener(new cboncheckedchangelistener());

        CheckBox cb_xie = (CheckBox)findViewById(R.id.cb_xie);
        cb_xie.setOnCheckedChangeListener(new cboncheckedchangelistener());

    }
    

    //checkbox的监听事件 内部类
    private class cboncheckedchangelistener implements CompoundButton.OnCheckedChangeListener
    {
        @Override
        public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {

            CheckBox cb = (CheckBox)buttonView;
            
            if (isChecked)
            {
                Toast.makeText(UIActivity.this, "选中了"+cb.getText(), Toast.LENGTH_SHORT).show();
            }
            else
            {
                Toast.makeText(UIActivity.this, "取消选中了"+cb.getText(), Toast.LENGTH_SHORT).show();
            }

        }
    }
}