Android Radio (radiogroup) Check (checkbox) button app

The first step is to create an Android project.

The second step is to modify the generated Res/layout/main.xml

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<?xml version= "1.0" encoding= "Utf-8"?>

<linearlayout xmlns:android= "Http://schemas.android.com/apk/res/android"

android:orientation= "Vertical"

Android:layout_width= "Fill_parent"

android:layout_height= "Fill_parent"

>

<checkbox

Android:id= "@+id/checkbox"

Android:layout_width= "Wrap_content"

android:layout_height= "Wrap_content"

android:text= "check box 1"/>

<checkbox

Android:id= "@+id/checkbox1"

Android:layout_width= "Wrap_content"

android:layout_height= "Wrap_content"

android:text= "check box 2"/>

<radiogroup

Android:id= "@+id/radiogroup"

android:orientation= "Vertical"

Android:layout_width= "Fill_parent"

android:layout_height= "Fill_parent" >

<radiobutton android:id= "@+id/radion1"

Android:layout_width= "Wrap_content" android:layout_height= "Wrap_content"

android:text= "Beijing"/>

<radiobutton android:id= "@+id/radion2"

Android:layout_width= "Wrap_content" android:layout_height= "Wrap_content"

android:text= "Tianjin"/>

<radiobutton android:id= "@+id/radion3"

Android:layout_width= "Wrap_content" android:layout_height= "Wrap_content"

android:text= "Shanghai"/>

<radiobutton android:id= "@+id/radion4"

Android:layout_width= "Wrap_content" android:layout_height= "Wrap_content"

android:text= "Chongqing"/>

</RadioGroup>

</LinearLayout>

Step three, add the main code

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Import android.app.Activity;

Import Android.os.Bundle;

Import Android.widget.CheckBox;

Import Android.widget.CompoundButton;

Import Android.widget.RadioButton;

Import Android.widget.RadioGroup;

Import Android.widget.CompoundButton.OnCheckedChangeListener;

public class CheckBox extends Activity implements Oncheckedchangelistener {

/** called when the activity is first created. */

RadioButton r1 = null;

RadioButton r2 = null;

RadioButton r3 = null;

RadioButton r4 = null;

@Override

public void OnCreate (Bundle savedinstancestate) {

Super.oncreate (savedinstancestate);

Setcontentview (R.layout.main);

CheckBox checkbox = (checkbox) Findviewbyid (R.id.checkbox);

CheckBox checkBox1 = (checkbox) Findviewbyid (R.id.checkbox1);

Get a radio button group

Radiogroup Radiogroup = (radiogroup) Findviewbyid (R.id.radiogroup);

Get radio button

R1 = (RadioButton) Findviewbyid (R.id.radion1);

r2 = (RadioButton) Findviewbyid (R.id.radion2);

R3 = (RadioButton) Findviewbyid (R.id.radion3);

R4 = (RadioButton) Findviewbyid (R.ID.RADION4);

Checkbox.setchecked (TRUE);

R1.setclickable (TRUE);

Monitor Multi-Select button

Checkbox.setoncheckedchangelistener (this);

Checkbox1.setoncheckedchangelistener (this);

Listen radio button

Radiogroup.setoncheckedchangelistener (Mchangeradio);

}

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