[Android]CheckBox 及 Button 使用範例

<CheckBoxButton.java>

   1: package com.android.checkboxbutton;

   2:  

   3: import android.app.Activity;

   4: import android.os.Bundle;

   5: import android.view.View;

   6: import android.view.View.OnClickListener;

   7: import android.widget.Button;

   8: import android.widget.CheckBox;

   9: import android.widget.CompoundButton;

  10: import android.widget.CompoundButton.OnCheckedChangeListener;

  11:  

  12: public class CheckBoxButton extends Activity {

  13:     /** Called when the activity is first created. */

  14:     private CheckBox chk;

  15:     private Button b1, b2;

  16:  

  17:     @Override

  18:     public void onCreate(Bundle savedInstanceState) {

  19:         super.onCreate(savedInstanceState);

  20:         setContentView(R.layout.main);

  21:         

  22:         findViews();

  23:         setListeners();

  24:     }

  25:     

  26:     

  27:     private void findViews(){

  28:         chk = (CheckBox)findViewById(R.id.chk);

  29:         b1 = (Button)findViewById(R.id.btnReverseCheck);

  30:         b2 = (Button)findViewById(R.id.btnExit);

  31:     }

  32:         

  33:        

  34:     private void setListeners(){

  35:         chk.setOnCheckedChangeListener(new OnCheckedChangeListener() {

  36:             public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {

  37:                 if(isChecked)

  38:                 {

  39:                     chk.setText("目前狀態 : 已勾選");

  40:                 }

  41:                 else

  42:                 {

  43:                     chk.setText("目前狀態 : 尚未勾選");

  44:                 }

  45:             }

  46:         });

  47:         

  48:         b1.setOnClickListener(new OnClickListener(){

  49:             public void onClick(View arg0) {

  50:                 chk.setChecked(!chk.isChecked());

  51:             }

  52:          });

  53:         

  54:         b2.setOnClickListener(new OnClickListener(){

  55:              public void onClick(View arg0) {

  56:                 android.os.Process.killProcess(android.os.Process.myPid());

  57:             }

  58:          });

  59:     }

  60:     

  61: }

<main.xml>

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


   2: <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
   3:     android:layout_width="fill_parent"
   4:     android:layout_height="fill_parent"
   5:     android:orientation="vertical" >
   6:  
   7:     <CheckBox
   8:         android:id="@+id/chk"
   9:         android:layout_width="fill_parent"
  10:         android:layout_height="wrap_content"
  11:         android:text="@string/strCheckbox" />
  12:     
  13:     <Button
  14:         android:id="@+id/btnReverseCheck"
  15:         android:layout_width="fill_parent"
  16:         android:layout_height="wrap_content"
  17:         android:text="@string/strReverseCheck" />
  18:  
  19:     <Button
  20:         android:id="@+id/btnExit"
  21:         android:layout_width="wrap_content"
  22:         android:layout_height="wrap_content"
  23:         android:text="@string/strExit" />
  24:  
  25: </LinearLayout>


<strings.xml>


   1: <?xml version="1.0" encoding="utf-8"?>
   2: <resources>
   3:  
   4:     <string name="hello">Hello World, CheckBoxButton!</string>
   5:     <string name="app_name">CheckBoxButton</string>
   6:     <string name="strCheckbox">目前狀態：尚未勾選</string>
   7:     <string name="strButton">反向勾選</string>
   8:     <string name="strExit">離開</string>
   9:     <string name="strReverseCheck">反向勾選</string>
  10:     
  11: </resources>