安卓对话框之----多选框(CheckBox)

<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>


====================================================

<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>

==========================================================

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();

}
};

}