【移動(dòng)應(yīng)用開(kāi)發(fā)技術(shù)】Android學(xué)習(xí)筆記：常用控件 RadioGroup和CheckBox

【移動(dòng)應(yīng)用開(kāi)發(fā)技術(shù)】Android學(xué)習(xí)筆記：常用控件RadioGroup和CheckBox

RadioGroup和CheckBox是android的常用控件，本文自做簡(jiǎn)單介紹和學(xué)習(xí)筆記，所以所用的控件樣式選用android默認(rèn)的樣式。先看下代碼實(shí)現(xiàn)的效果圖圖中，上面兩個(gè)（male和female）為一個(gè)RadioGroup中的兩個(gè)RadioButton，下面三個(gè)為CheckBox。一個(gè)RadioGroup里面的內(nèi)容只可單選，CheckBox可多選。接下來(lái)是代碼部分布局文件代碼activity_main.xml:<LinearLayout

xmlns:android="/apk/res/android"

xmlns:tools="/tools"

android:layout_width="match_parent"

android:layout_height="match_parent"

android:orientation="vertical"

tools:context="com.jam.radiogroupandcheckbox.MainActivity"

>

<RadioGroup

android:id="@+id/id_radiogroup"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

>

<RadioButton

android:id="@+id/id_radiobutton_male"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:text="male"

/>

<RadioButton

android:id="@+id/id_radiobutton_female"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:text="female"

/>

</RadioGroup>

<CheckBox

android:id="@+id/id_checkbox_one"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:text="one"

/>

<CheckBox

android:id="@+id/id_checkbox_two"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:text="two"

/>

<CheckBox

android:id="@+id/id_checkbox_three"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:text="three"

/>

</LinearLayout>采用的是線性布局，代碼比較簡(jiǎn)單，就是一個(gè)RadioGroup包含了兩個(gè)RadioButton（想要多少RadioButton就加多少個(gè)），還有三個(gè)CheckBox。接下來(lái)是MainActivity.java:package

com.jam.radiogroupandcheckbox;

import

android.app.Activity;

import

android.os.Bundle;

import

android.util.Log;

import

android.view.Menu;

import

android.widget.CheckBox;

import

android.widget.CompoundButton;

import

android.widget.RadioButton;

import

android.widget.RadioGroup;

import

android.widget.RadioGroup.OnCheckedChangeListener;

public

class

MainActivity

extends

Activity

{

//聲明控件

private

RadioGroup

radioGroup;

private

CheckBox

checkBox_one;

private

CheckBox

checkBox_two;

private

CheckBox

checkBox_three;

@Override

protected

void

onCreate(Bundle

savedInstanceState)

{

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

radioGroup

=

(RadioGroup)

findViewById(R.id.id_radiogroup);

checkBox_one

=

(CheckBox)

findViewById(R.id.id_checkbox_one);

checkBox_two

=

(CheckBox)

findViewById(R.id.id_checkbox_two);

checkBox_three

=

(CheckBox)

findViewById(R.id.id_checkbox_three);

/**

*

radioGroup綁定一個(gè)匿名內(nèi)部類android.widget.RadioGroup.OnCheckedChangeListener

*/

radioGroup.setOnCheckedChangeListener(new

OnCheckedChangeListener()

{

@Override

public

void

onCheckedChanged(RadioGroup

group,

int

checkedId)

{

switch

(checkedId)

{

case

R.id.id_radiobutton_male:

Log.i("radioGroup",

"male");

break;

case

R.id.id_radiobutton_female:

Log.i("radioGroup",

"female");

break;

}

}

});

//給三個(gè)CheckBox綁定監(jiān)聽(tīng)器

checkBox_one.setOnCheckedChangeListener(new

myOnCheckedChangeListener());

checkBox_two.setOnCheckedChangeListener(new

myOnCheckedChangeListener());

checkBox_three.setOnCheckedChangeListener(new

myOnCheckedChangeListener());

}

/**

*

注意CheckBox綁定的Listener是android.widget.CompoundButton.OnCheckedChangeListener

*

@author

jam

*

*/

private

class

myOnCheckedChangeListener

implements

android.widget.CompoundButton.OnCheckedChangeListener

{

@Override

public

void

onCheckedChanged(CompoundButton

buttonView,

boolean

isChecked)

{

switch

(buttonView.getId())

{

case

R.id.id_checkbox_one:

Log.i("checkbox",

"one");

break;

case

R.id.id_checkbox_two:

Log.i(