Android基础控件RadioGroup使用方法详解

<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
  <!--选中-->
  <item android:state_checked="true" android:drawable="@drawable/radio_choose"/>

  <!--普通状态-->
  <item android:drawable="@drawable/radio_unchoose"/>
</selector>

<?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=".RadioGroupActivity"
  android:orientation="vertical">

  <TextView
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:textSize="18sp"
    android:textColor="#000000"
    android:text="这是横着放的RadioGroup"/>

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

    <RadioButton
      android:layout_width="0dp"
      android:layout_height="wrap_content"
      android:layout_weight="1"
      android:checked="false"
      android:text="好"
      android:textSize="18sp"
      android:id="@+id/rb_horizontal_good"
      android:textColor="#000000"/>

    <RadioButton
      android:layout_width="0dp"
      android:layout_height="wrap_content"
      android:layout_weight="1"
      android:checked="false"
      android:text="很好"
      android:textSize="18sp"
      android:id="@+id/rb_horizontal_very_good"
      android:textColor="#000000"/>
  </RadioGroup>

  <TextView
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:textSize="18sp"
    android:textColor="#000000"
    android:text="这是竖着放的RadioGroup"/>

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

    <RadioButton
      android:layout_width="wrap_content"
      android:layout_height="0dp"
      android:layout_weight="1"
      android:checked="false"
      android:text="好"
      android:textSize="18sp"
      android:id="@+id/rb_vertical_good"
      android:textColor="#000000"/>

    <RadioButton
      android:layout_width="wrap_content"
      android:layout_height="0dp"
      android:layout_weight="1"
      android:checked="false"
      android:text="很好"
      android:textSize="18sp"
      android:id="@+id/rb_vertical_very_good"
      android:textColor="#000000"/>
  </RadioGroup>

  <TextView
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:textSize="18sp"
    android:textColor="#000000"
    android:text="这是改了图标竖着放的RadioGroup"/>

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

    <RadioButton
      android:button="@drawable/radio_button_selector"
      android:layout_width="wrap_content"
      android:layout_height="0dp"
      android:layout_weight="1"
      android:checked="false"
      android:text="这个是直接设置button的RadioButton"
      android:textSize="18sp"
      android:id="@+id/rb_vertical_custom_good"
      android:textColor="#000000"/>

    <RadioButton
      android:button="@null"
      android:drawableLeft="@drawable/radio_button_selector"
      android:drawablePadding="10dp"
      android:layout_width="wrap_content"
      android:layout_height="0dp"
      android:layout_weight="1"
      android:checked="false"
      android:text="这个是设置drawableLeft属性的RadioButton"
      android:textSize="18sp"
      android:id="@+id/rb_vertical_custom_very_good"
      android:textColor="#000000"/>
  </RadioGroup>
</LinearLayout>

package xyz.strasae.androidlearn.my;

import androidx.appcompat.app.AppCompatActivity;

import android.os.Bundle;
import android.widget.RadioButton;
import android.widget.RadioGroup;
import android.widget.Toast;

public class RadioGroupActivity extends AppCompatActivity {
  RadioGroup rg_horizontal_demo;
  RadioGroup rg_vertical_demo;

  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_radio_group);
    rg_horizontal_demo = findViewById(R.id.rg_horizontal_demo);
    rg_vertical_demo = findViewById(R.id.rg_vertical_demo);
    rg_horizontal_demo.setOnCheckedChangeListener(new RadioGroup.OnCheckedChangeListener() {
      @Override
      public void onCheckedChanged(RadioGroup radioGroup, int i) {
        RadioButton rb_temp = findViewById(radioGroup.getCheckedRadioButtonId());
        Toast.makeText(RadioGroupActivity.this, String.format("你选择了%s", rb_temp.getText().toString()), Toast.LENGTH_SHORT).show();
      }
    });
    rg_vertical_demo.setOnCheckedChangeListener(new RadioGroup.OnCheckedChangeListener() {
      @Override
      public void onCheckedChanged(RadioGroup radioGroup, int i) {
        RadioButton rb_temp = findViewById(radioGroup.getCheckedRadioButtonId());
        Toast.makeText(RadioGroupActivity.this, String.format("你选择了%s", rb_temp.getText().toString()), Toast.LENGTH_SHORT).show();
      }
    });
  }
}