【Android】单选框和多选框

 

文章目录

• 单选框
• • xml文件
  • Activity代码
  • 运行结果
• 多选框
• • xml文件
  • Activity代码
  • 运行结果

 

---

单选框

xml文件

<LinearLayout xmlns:android="http:///apk/res/android"
    xmlns:tools="http:///tools"
    android:id="@+id/LinearLayout1"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    tools:context=".MainActivity" >

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="请选择性别"
        android:textSize="23dp"
        />

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

        <RadioButton
            android:id="@+id/btnMan"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="男"
            android:checked="true"/>

        <RadioButton
            android:id="@+id/btnWoman"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="女"/>
    </RadioGroup>

    <Button
        android:id="@+id/btnpost"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="提交"/>

</LinearLayout>

Activity代码

package com.example.androidtest.component;

import .AppCompatActivity;

import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.RadioButton;
import android.widget.RadioGroup;
import android.widget.Toast;

import com.example.androidtest.R;

public class RadioActivity extends AppCompatActivity {

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

        RadioGroup radgroup = (RadioGroup) findViewById(.radioGroup);
        //第一种获得单选按钮值的方法
        //为radioGroup设置一个监听器:setOnCheckedChanged()
        radgroup.setOnCheckedChangeListener(new RadioGroup.OnCheckedChangeListener() {
            @Override
            public void onCheckedChanged(RadioGroup group, int checkedId) {
                RadioButton radbtn = (RadioButton) findViewById(checkedId);
                Toast.makeText(getApplicationContext(), "按钮组值发生改变,你选了" + radbtn.getText(), Toast.LENGTH_LONG).show();
            }
        });
        Button btnchange = (Button) findViewById(.btnpost);
        //为radioGroup设置一个监听器:setOnCheckedChanged()
        btnchange.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                for (int i = 0; i < radgroup.getChildCount(); i++) {
                    RadioButton rd = (RadioButton) radgroup.getChildAt(i);
                    if (rd.isChecked()) {
                        Toast.makeText(getApplicationContext(), "点击提交按钮,获取你选择的是:" + rd.getText(), Toast.LENGTH_LONG).show();
                        break;
                    }
                }
            }
        });
    }
}

运行结果

多选框

xml文件

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http:///apk/res/android"
    xmlns:tools="http:///tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    tools:context=".component.CheckBoxActivity">

    <CheckBox
        android:id="@+id/eat"
        android:layout_width="90dp"
        android:layout_height="wrap_content"
        android:text="吃饭" />

    <CheckBox
        android:id="@+id/sleep"
        android:layout_width="90dp"
        android:layout_height="wrap_content"
        android:text="睡觉" />

    <CheckBox
        android:id="@+id/da_dou"
        android:layout_width="90dp"
        android:layout_height="wrap_content"
        android:text="打豆豆" />

    <Button
        android:id="@+id/checkBoxButton"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="提交" />
</LinearLayout>

Activity代码

package com.example.androidtest.component;

import .AppCompatActivity;

import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.CheckBox;
import android.widget.CompoundButton;
import android.widget.Toast;

import com.example.androidtest.R;

public class CheckBoxActivity extends AppCompatActivity {

    private CheckBox eat, sleep, da_dou;
    private Button button;

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

        eat = findViewById(.eat);
        sleep = findViewById(.sleep);
        da_dou = findViewById(.da_dou);
        button = findViewById(.checkBoxButton);

        //单独的监控
        eat.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
            @Override
            public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
                if (buttonView.isChecked())Toast.makeText(CheckBoxActivity.this,buttonView.getText()+"被选中",Toast.LENGTH_SHORT).show();
            }
        });

        //通过一个按钮集体显示
        button.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                String msg = (eat.isChecked() ? eat.getText().toString() : "") +
                        (sleep.isChecked() ? sleep.getText().toString() : "") +
                        (da_dou.isChecked() ? da_dou.getText().toString() : "");
                Toast.makeText(CheckBoxActivity.this,msg,Toast.LENGTH_SHORT).show();
            }
        });
    }
}

运行结果