Android之RadioButton

1. 常用属性
2. 自定义样式
3. 监听事件

MainActivity以及他对应的.xml文件

package com.example.test0508;

import androidx.appcompat.app.AppCompatActivity;

import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;

public class MainActivity extends AppCompatActivity {

    private Button mBtnRadioButton;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        mBtnRadioButton = findViewById(R.id.btn_radioButton);
        mBtnRadioButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                Intent intent = new Intent(MainActivity.this,RadioButtonActivity.class);
                startActivity(intent);
            }
        });
    }
}

<?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"
    android:orientation="vertical">

    <Button
        android:id="@+id/btn_textview"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="TextView"
    />

    <Button
        android:id="@+id/btn_button"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="这节课是Button"
    />

    <Button
        android:id="@+id/btn_editText"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="EditText"
        android:textAllCaps="false"
        />

<!--    本章博客的内容-->
    <Button
        android:id="@+id/btn_radioButton"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="RadioButton"
        android:textAllCaps="false"

    />
</LinearLayout>

---

selector_orange

<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
<!--    selector 根布局-->
<!--    按压效果-->
    <item android:state_checked="true" >
        <shape>
            <solid android:color="#6633cc" />
            <corners android:radius="25dp" />
        </shape>
    </item>

<!--    没有按压的时候,用描边显示-->
    <item android:state_pressed="false" >
        <shape>
            <stroke android:width="1dp"
                android:color="#6633cc"/>
            <corners android:radius="25dp" />
        </shape>
    </item>
</selector>

正文RadioButtonActivity以及他的配置文件

package com.example.test0508;

import androidx.appcompat.app.AppCompatActivity;

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

public class RadioButtonActivity extends AppCompatActivity {

    /**
     * 监听事件
     */
    private RadioGroup mRg1;



    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_radio_button);
        mRg1 = findViewById(R.id.rg_1);
        /*
            监听事件
         */
        mRg1.setOnCheckedChangeListener(new RadioGroup.OnCheckedChangeListener() {
            @Override
            public void onCheckedChanged(RadioGroup radioGroup, int i) {
                RadioButton radioButton = radioGroup.findViewById(i);
                Toast.makeText(RadioButtonActivity.this,radioButton.getText(),Toast.LENGTH_SHORT).show();
            }
        });
    }
}

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout 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"
    android:padding="15dp"
    >

    <RadioGroup
        android:id="@+id/rg_1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:orientation="vertical"
    >

        <RadioButton
            android:id="@+id/rb_1"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:checked="true"
            android:text="男"
            android:textColor="#000000"
            android:textSize="18sp" />
        <RadioButton
            android:id="@+id/rb_2"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="女"
            android:textSize="18sp"
            android:textColor="#000000"
            />
    </RadioGroup>


<!--    第二个选择的-->
    <RadioGroup
        android:id="@+id/rg_2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:orientation="horizontal"
        android:layout_below="@id/rg_1"
        android:layout_marginTop="50dp"
        >
        <RadioButton
            android:id="@+id/rb_3"
            android:layout_width="60dp"
            android:layout_height="40dp"
            android:checked="true"
            android:gravity="center"
            android:text="男"
            android:button="@null"
            android:background="@drawable/selector_orange"
            android:textColor="#000000"
            android:textSize="18sp" />
        <RadioButton
            android:id="@+id/rb_4"
            android:layout_width="60dp"
            android:layout_height="40dp"
            android:gravity="center"
            android:text="女"
            android:button="@null"
            android:background="@drawable/selector_orange"
            android:textSize="18sp"
            android:textColor="#000000"
            android:layout_marginLeft="10dp"
            />
    </RadioGroup>


</RelativeLayout>