day03：CheckBox复选框

 

案例：

选择语言，按确定后，汇总选择的语言

 

AndroidManifest.xml

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.lvshitech.checkboxdemo"
    android:versionCode="1"
    android:versionName="1.0" >

    <uses-sdk
        android:minSdkVersion="8"
        android:targetSdkVersion="18" />

    <application
        android:allowBackup="true"
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/AppTheme" >
        <activity
            android:name="com.lvshitech.checkboxdemo.CheckBoxDemo"
            android:label="@string/app_name" >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
    </application>

</manifest>

 CheckBoxDemo.java

package com.lvshitech.checkboxdemo;

import android.app.Activity;
import android.graphics.Color;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.CheckBox;
import android.widget.CompoundButton;
import android.widget.TextView;

public class CheckBoxDemo extends Activity {
	
	// 页面控件
	CheckBox chkChs, chkEns, chkJap;
	Button btnOk;
	TextView tvResult;
	// 各个复选框是否被选中的标识
	boolean chkChsFlag=false, chkEnsFlag=false, chkJapFlag=false;

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		
		// 设定布局
		setContentView(R.layout.checkboxdemo);
		
		// 关联XML
		chkChs = (CheckBox) findViewById(R.id.chkChs);
		chkEns = (CheckBox) findViewById(R.id.chkEns);
		chkJap = (CheckBox) findViewById(R.id.chkJap);
		btnOk = (Button) findViewById(R.id.btnOk);
		tvResult = (TextView) findViewById(R.id.tvResult);
		
		// 中文复选框监听事件
		chkChs.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
			@Override
			public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
				if(isChecked) {
					chkChsFlag = true;
				} else {
					chkChsFlag = false;
				} 
			}
		});
		
		// 英语复选框监听事件
		chkEns.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
			@Override
			public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
				if(isChecked) {
					chkEnsFlag = true;
				} else {
					chkEnsFlag = false;
				}
			}
		});
		
		// 日语复选框监听事件
		chkJap.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
			@Override
			public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
				if(isChecked) {
					chkJapFlag = true;
				} else {
					chkJapFlag = false;
				}
			}
		});
		
		// 确定按钮监听事件
		btnOk.setOnClickListener(new View.OnClickListener() {
			@Override
			public void onClick(View arg0) {
				String result = "";
				StringBuffer sb = new StringBuffer();
				if(chkChsFlag) {
					sb.append(chkChs.getText() + "、");
				}
				if(chkEnsFlag) {
					sb.append(chkEns.getText() + "、");
				}
				if(chkJapFlag) {
					sb.append(chkJap.getText() + "、");
				}
				if(!"".equals(sb.toString())) {
					String temp = sb.toString().trim();
					result = "选中的语言：" + temp.substring(0, temp.length()-1);
				} else {
					result = "没有选中任何语言！";
				}
				tvResult.setText(result);
				tvResult.setTextColor(Color.RED);
			}
		});
	}
	
}

 checkboxdemo.xml

<RelativeLayout 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=".MainActivity" >

    <TextView
        android:id="@+id/tvLanguage"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="@string/language"
        android:textSize="16sp" />

    <CheckBox
        android:id="@+id/chkChs"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignLeft="@+id/tvLanguage"
        android:layout_below="@+id/tvLanguage"
        android:layout_marginTop="20dp"
        android:text="@string/chinese" />

    <CheckBox
        android:id="@+id/chkEns"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignLeft="@+id/chkChs"
        android:layout_below="@+id/chkChs"
        android:layout_marginTop="18dp"
        android:text="@string/english" />

    <CheckBox
        android:id="@+id/chkJap"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignLeft="@+id/chkEns"
        android:layout_below="@+id/chkEns"
        android:layout_marginTop="22dp"
        android:text="@string/japanese" />

    <Button
        android:id="@+id/btnOk"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignBaseline="@+id/chkJap"
        android:layout_alignBottom="@+id/chkJap"
        android:layout_alignRight="@+id/tvResult"
        android:layout_marginRight="16dp"
        android:text="@string/btnOk" />

    <TextView
        android:id="@+id/tvResult"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_alignLeft="@+id/chkJap"
        android:layout_below="@+id/btnOk"
        android:layout_marginTop="56dp"
        />

</RelativeLayout>

 string.xml

<?xml version="1.0" encoding="utf-8"?>
<resources>

    <string name="app_name">CheckBoxDemo</string>
    <string name="action_settings">Settings</string>
    <string name="hello_world">Hello world!</string>
    <string name="language">您要学习的语言：</string>
    <string name="chinese">中文</string>
    <string name="english">英语</string>
    <string name="japanese">日语</string>
    <string name="btnOk">确定</string>

</resources>