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  • 加监听器,单选复选按钮

    MainActivity

    package com.example.lenovo.myapplication;
    
    import android.provider.MediaStore;
    import android.support.v7.app.AppCompatActivity;
    import android.os.Bundle;
    import android.widget.CheckBox;
    import android.widget.CompoundButton;
    import android.widget.RadioButton;
    import android.widget.RadioGroup;
    import android.widget.Switch;
    import android.widget.Toast;
    import android.widget.ToggleButton;
    
    public class TextActivity1 extends AppCompatActivity {
    
        RadioGroup rg_1;
        RadioButton nan;
        RadioButton nv;
        CheckBox cb_1;
        CheckBox cb_2;
        ToggleButton tb_1;
        Switch sw_1;
    
        @Override
        protected void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.activity_text1);
    
            rg_1=(RadioGroup)findViewById(R.id.rg_1);
            nan=(RadioButton)findViewById(R.id.nan);
            nv=(RadioButton)findViewById(R.id.nv);
            cb_1=(CheckBox)findViewById(R.id.cb_1);
            cb_2=(CheckBox)findViewById(R.id.cb_2);
            tb_1=(ToggleButton)findViewById(R.id.tb_1);
            sw_1=(Switch)findViewById(R.id.sw_1);
    
            tb_1.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
                @Override
                public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
    
                    Toast.makeText(TextActivity1.this, "ToggleButton开关状态:"+(isChecked?"开":"关"), Toast.LENGTH_SHORT).show();
                }
            });
    
            sw_1.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
                @Override
                public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
                    Toast.makeText(TextActivity1.this, "Switch开关状态:"+(isChecked?"开":"关"), Toast.LENGTH_SHORT).show();
                }
            });
    
            //加监听器.监听器的实例
            CB_OnCheckedChangeListener cb1=new CB_OnCheckedChangeListener();
            //监听器绑定
            cb_1.setOnCheckedChangeListener(cb1);
            cb_2.setOnCheckedChangeListener(cb1);
    
            rg_1.setOnCheckedChangeListener(new RadioGroup.OnCheckedChangeListener() {
                @Override
                //被选中的组件id。RadioButton的id
                public void onCheckedChanged(RadioGroup group, int checkedId) {
                    //提示选中的内容
                    //判断谁被选中
                    if (checkedId==nan.getId())
                    {
                        Toast.makeText(TextActivity1.this, "选中的是:"+nan.getText(), Toast.LENGTH_SHORT).show();
                    }
                    else if (checkedId==nv.getId())
                    {
                        Toast.makeText(TextActivity1.this, "选中的是:"+nv.getText(), Toast.LENGTH_SHORT).show();
    
                    }
    
                }
            });
        }
        //公共的复选按钮的监听器
        class CB_OnCheckedChangeListener implements CompoundButton.OnCheckedChangeListener
        {
            @Override
            public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
    
                CheckBox cb=(CheckBox)buttonView;
                String str=cb.getText().toString();
                if (isChecked)
                {
                    Toast.makeText(TextActivity1.this, "被选中", Toast.LENGTH_SHORT).show();
                }
                else
                {
                    Toast.makeText(TextActivity1.this, "被取消选中", Toast.LENGTH_SHORT).show();
    
                }
            }
        }
    }
    View Code

    activity_main

    <?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:paddingBottom="@dimen/activity_vertical_margin"
        android:paddingLeft="@dimen/activity_horizontal_margin"
        android:paddingRight="@dimen/activity_horizontal_margin"
        android:paddingTop="@dimen/activity_vertical_margin"
        tools:context="com.example.lenovo.myapplication.TextActivity1"
        android:orientation="vertical">
    
        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content">
        <ImageButton
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:src="@drawable/nnn"/>
        <ImageButton
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:src="@drawable/abc"/>
        <Button
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:background="@drawable/nnn"
            android:text="普通按钮可以加字"/>
        </LinearLayout>
        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:orientation="horizontal">
        <ImageView
            android:layout_width="100dp"
            android:layout_height="100dp"
            android:src="@drawable/qq"
            android:alpha="1"
            android:background="#F00"
            android:scaleType="center"/>
        <ImageView
            android:layout_width="100dp"
            android:layout_height="100dp"
            android:src="@drawable/qq"
            android:alpha="1"
            android:background="#F00"
            android:scaleType="centerCrop"/>
            <ImageView
                android:layout_width="100dp"
                android:layout_height="100dp"
                android:src="@drawable/abc"
                android:alpha="1"
                android:background="#F00"
                android:scaleType="centerInside"/>
    
        </LinearLayout>
        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:orientation="horizontal">
            <ImageView
                android:layout_width="100dp"
                android:layout_height="100dp"
                android:src="@drawable/abc"
                android:alpha="1"
                android:background="#F00"
                android:scaleType="matrix"/>
            <ImageView
                android:layout_width="100dp"
                android:layout_height="100dp"
                android:src="@drawable/abc"
                android:alpha="1"
                android:background="#F00"
                android:scaleType="fitCenter"/>
            <ImageView
                android:layout_width="100dp"
                android:layout_height="100dp"
                android:src="@drawable/abc"
                android:alpha="1"
                android:background="#F00"
                android:scaleType="fitXY"/>
        </LinearLayout>
        <RadioGroup
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:id="@+id/rg_1"
            android:orientation="horizontal">
            <RadioButton
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="单选,男"
                android:checked="true"
                android:id="@+id/nan"/>
            <RadioButton
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="单选,女"
                android:id="@+id/nv"/>
        </RadioGroup>
        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:orientation="horizontal">
        <CheckBox
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="范冰冰"
            android:id="@+id/cb_1"
            android:checked="true"/>
        <CheckBox
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="章子怡"
            android:id="@+id/cb_2"/>
    
    
            </LinearLayout>
    
        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content">
        <ToggleButton
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:textOn="开"
            android:textOff="关"
            android:id="@+id/tb_1"/>
        <Switch
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:textOff="关"
            android:textOn="开"
            android:text="开关"
            android:id="@+id/sw_1"/>
    
        </LinearLayout>
    
    </LinearLayout>
    View Code
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  • 原文地址:https://www.cnblogs.com/1ming/p/5480944.html
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