android单选框和复选框（练习）

<?xml version="1.0" encoding="utf-8"?>    xmlns:tools="http://schemas.android.com/tools"    android:layout_width="match_parent"    android:layout_height="match_parent"    android:orientation="vertical"    android:padding="10dp"    tools:context="com.example.dell.test5.UiActivity1">    <TextView        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:text="请选择Android的开发语言"/>    <RadioGroup        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:orientation="horizontal"        android:id="@+id/rg">        <RadioButton            android:layout_width="wrap_content"            android:layout_height="wrap_content"            android:text="C++"            android:id="@+id/rb1"            android:layout_marginRight="30dp"            />        <RadioButton            android:layout_width="wrap_content"            android:layout_height="wrap_content"            android:text="C"            android:id="@+id/rb2"            android:layout_marginRight="30dp"            android:checked="true"/>        <RadioButton            android:layout_width="wrap_content"            android:layout_height="wrap_content"            android:text="Java"            android:id="@+id/rb3"            android:layout_marginRight="30dp"/>        <RadioButton            android:layout_width="wrap_content"            android:layout_height="wrap_content"            android:text="C#"            android:id="@+id/rb4" />        <TextView        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:text="请选择字体效果"/>    <CheckBox        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:text="宋体"        android:id="@+id/cb_st" />    <CheckBox        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:text="加粗"        android:id="@+id/cb_jc" />    <CheckBox        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:text="斜体"        android:id="@+id/cb_xt" />    <CheckBox        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:text="下划线"        android:id="@+id/cb_xhx" />

package com.example.dell.test5;import android.os.Bundle;import android.support.v7.app.AppCompatActivity;import android.widget.CheckBox;import android.widget.CompoundButton;import android.widget.RadioButton;import android.widget.RadioGroup;import android.widget.Toast;public class UiActivity1 extends AppCompatActivity {    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_ui1);        RadioGroup radioGroup = (RadioGroup)findViewById(R.id.rg);        radioGroup.setOnCheckedChangeListener(new RadioGroup.OnCheckedChangeListener() {            @Override            public void onCheckedChanged(RadioGroup group, int checkedId) {                if (checkedId == R.id.rb3) {                    Toast.makeText(UiActivity1.this, "选对了", Toast.LENGTH_SHORT).show();                }                RadioButton rb = (RadioButton) findViewById(checkedId);                Toast.makeText(UiActivity1.this, rb.getText(), Toast.LENGTH_LONG).show();            }        });        CheckBox cb_st = (CheckBox)findViewById(R.id.cb_st);        cb_st.setOnCheckedChangeListener(new CBOnCheckedChangeListenner());        CheckBox cb_jc = (CheckBox)findViewById(R.id.cb_jc);        cb_jc.setOnCheckedChangeListener(new CBOnCheckedChangeListenner());        CheckBox cb_xt = (CheckBox)findViewById(R.id.cb_xt);        cb_xt.setOnCheckedChangeListener(new CBOnCheckedChangeListenner());        CheckBox cb_xhx = (CheckBox)findViewById(R.id.cb_xhx);        cb_xhx.setOnCheckedChangeListener(new CBOnCheckedChangeListenner());    }    private class CBOnCheckedChangeListenner implements CompoundButton.OnCheckedChangeListener    {        @Override        public void onCheckedChanged(CompoundButton buttonView, boolean isChecked)        {            CheckBox cb = (CheckBox)buttonView;            if(isChecked)            {                Toast.makeText(UiActivity1.this, "选中了" + cb.getText(), Toast.LENGTH_SHORT).show();            }            else            {                Toast.makeText(UiActivity1.this, "取消了" + cb.getText(), Toast.LENGTH_SHORT).show();            }            }    }}

转载于:https://www.cnblogs.com/youshashuosha/p/5331011.html

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