Android电话短信拦截项目总结之 多选框(CheckBox)

效果图：



简单讲解一下原理：每个多选框都是独立的，可以通过迭代所有多选框，然后根据其状态是否被选中再获取其值。

CheckBox.setChecked(true);//设置成选中状态。

CheckBox.getText();//获取多选框的值

调用setOnCheckedChangeListener()方法，处理多选框被选择事件，把CompoundButton.OnCheckedChangeListener实例作为参数传入

1、布局文件：

[html] view
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<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" >

<CheckBox

android:id="@+id/checkBox1"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:layout_alignParentLeft="true"

android:layout_alignParentTop="true"

android:layout_marginLeft="40dp"

android:layout_marginTop="28dp"

android:text="@string/check_java" />

<CheckBox

android:id="@+id/checkBox2"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:layout_alignLeft="@+id/checkBox1"

android:layout_below="@+id/checkBox1"

android:layout_marginTop="39dp"

android:text="@string/check_.net" />

<CheckBox

android:id="@+id/checkBox3"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:layout_alignLeft="@+id/checkBox2"

android:layout_below="@+id/checkBox2"

android:layout_marginTop="47dp"

android:text="@string/check_php" />

<CheckBox

android:id="@+id/checkBox4"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:layout_alignLeft="@+id/checkBox3"

android:layout_below="@+id/checkBox3"

android:layout_marginTop="40dp"

android:text="@string/check_3G" />

<Button

android:id="@+id/button1"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:layout_alignRight="@+id/checkBox2"

android:layout_below="@+id/checkBox4"

android:layout_marginTop="58dp"

android:onClick="getValues"

android:text="@string/text_get" />

</RelativeLayout>

2、布局文件中引用的string.xml的值

[html] view
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<?xml version="1.0" encoding="utf-8"?>

<resources>

<string name="app_name">lession16-checkbox</string>

<string name="action_settings">Settings</string>

<string name="hello_world">Hello world!</string>

<string name="check_java">java专业</string>

<string name="check_.net">.net专业</string>

<string name="check_php">php专业</string>

<string name="check_3G">3G专业</string>

<string name="text_get">获取值</string>

</resources>

3、MainActivity中的代码：

[java] view
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package com.example.lession16_checkbox;

import java.util.ArrayList;

import java.util.List;

import android.os.Bundle;

import android.app.Activity;

import android.app.AlertDialog;

import android.view.Menu;

import android.view.View;

import android.widget.CheckBox;

import android.widget.CompoundButton;

import android.widget.Toast;

public class MainActivity extends Activity {

//声明组件

private CheckBox cb1,cb2,cb3,cb4;

//声明一个集合

private List<CheckBox> checkBoxs=new ArrayList<CheckBox>();

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

//获取组件

cb1 = (CheckBox) findViewById(R.id.checkBox1);

cb2 = (CheckBox) findViewById(R.id.checkBox2);

cb3 = (CheckBox) findViewById(R.id.checkBox3);

cb4 = (CheckBox) findViewById(R.id.checkBox4);

//默认选项

cb2.setChecked(true);

cb4.setChecked(true);

//注册事件

cb1.setOnCheckedChangeListener(listener);

cb2.setOnCheckedChangeListener(listener);

cb3.setOnCheckedChangeListener(listener);

cb4.setOnCheckedChangeListener(listener);

//把四个组件添加到集合中去

checkBoxs.add(cb1);

checkBoxs.add(cb2);

checkBoxs.add(cb3);

checkBoxs.add(cb4);

}

@Override

public boolean onCreateOptionsMenu(Menu menu) {

// Inflate the menu; this adds items to the action bar if it is present.

getMenuInflater().inflate(R.menu.main, menu);

return true;

}

public void getValues(View v) {

String content = "";

for (CheckBox cbx : checkBoxs) {

if (cbx.isChecked()) {

content += cbx.getText() + "\n";

}

}

if ("".equals(content)) {

content = "您还没有选择尼";

}

new AlertDialog.Builder(this).setMessage(content).setTitle("选中的内容如下")

.setPositiveButton("关闭", null).show();

}

CompoundButton.OnCheckedChangeListener listener = new CompoundButton.OnCheckedChangeListener() {

@Override

public void onCheckedChanged(CompoundButton buttonView,

boolean isChecked) {

// TODO Auto-generated method stub

CheckBox box = (CheckBox) buttonView;

Toast.makeText(getApplicationContext(),

"获取的值:" + isChecked + "xxxxx" + box.getText(),

Toast.LENGTH_LONG).show();

}

};

}

如果没有明白下载源码：
http://download.csdn.net/detail/zhaihaohao1/8616615