RadioButton 按了之后就不能修改了，不能复用（不建议RadioButton 单独使用） 只能选一次 1.RadioGroup RadioButton 的一个集合，提供多选一的机制 属性 android:orientation= “vertical” 垂直排布 “horizontal”水平排布 决定当前RadioGroup中RadioButton以什么形式排列
<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:app="http://schemas.android.com/apk/res-auto" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" tools:context="com.adb.li806.demo5.MainActivity" android:orientation="vertical" android:weightSum="1"> <RadioGroup android:orientation="horizontal" android:id="@+id/radioGroup1" android:layout_width="wrap_content" android:layout_height="wrap_content"> <RadioButton android:id="@+id/radioButton1" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_weight="1" android:text="喜欢" android:checked="true" android:textSize="25sp"/> <RadioButton android:id="@+id/radioButton2" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_weight="1" android:text="不喜欢" android:textSize="25sp"/> </RadioGroup> </LinearLayout> package com.adb.li806.demo5; import android.support.annotation.IdRes; import android.support.annotation.VisibleForTesting; import android.support.v7.app.AppCompatActivity; import android.os.Bundle; import android.util.Log; import android.widget.RadioGroup;//这个OnCheckedChangeListener包的选择 import android.widget.Toast; public class MainActivity extends AppCompatActivity implements RadioGroup.OnCheckedChangeListener{ private RadioGroup rg; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); rg = (RadioGroup) findViewById(R.id.radioGroup1); /* * 实现RadioGroup的监听事件 * */ rg.setOnCheckedChangeListener(this); } @Override public void onCheckedChanged(RadioGroup group, @IdRes int checkedId) { switch (checkedId){ case R.id.radioButton1: Log.i("tag","喜欢"); Toast.makeText(getApplicationContext(),"喜欢",Toast.LENGTH_SHORT).show(); break; case R.id.radioButton2: Log.i("tag","不喜欢"); Toast.makeText(getApplicationContext(),"不喜欢",Toast.LENGTH_SHORT).show(); break; default: } } }