[Android]Button 及 Toast 使用範例

<ButtonToast.java>

   1: package com.android.buttontoast;

   2:  

   3: import android.app.Activity;

   4: import android.os.Bundle;

   5: import android.view.View;

   6: import android.widget.Button;

   7: import android.widget.Toast;

   8:  

   9: public class ButtonToast extends Activity {

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

  11:     @Override

  12:     public void onCreate(Bundle savedInstanceState) {

  13:         super.onCreate(savedInstanceState);

  14:         setContentView(R.layout.main);

  15:         

  16:         Button btnPressMe = (Button) findViewById(R.id.pressmeBtn);

  17:         Button btnExit = (Button) findViewById(R.id.exitBtn);

  18:         

  19:         btnPressMe.setOnClickListener(new Button.OnClickListener(){

  20:             public void onClick(View v) {

  21:                 Toast.makeText(    ButtonToast.this,

  22:                                 "ButtonToast 程式執行成功！",

  23:                                 Toast.LENGTH_LONG).show();

  24:             } 

  25:         });

  26:         

  27:         btnExit.setOnClickListener(new Button.OnClickListener(){

  28:             public void onClick(View v) {

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

  30:             } 

  31:         });

  32:     }

  33: }

<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="horizontal" >

   6:  

   7:     <Button

   8:         android:id="@+id/pressmeBtn"

   9:         android:layout_width="wrap_content"

  10:         android:layout_height="wrap_content"

  11:         android:text="@string/strPressMe" />

  12:  

  13:     <Button

  14:         android:id="@+id/exitBtn"

  15:         android:layout_width="wrap_content"

  16:         android:layout_height="wrap_content"

  17:         android:text="@string/strExit" />

  18:  

  19: </LinearLayout>

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

   2: <resources>

   3:  

   4:     <string name="hello">Hello World, ButtonToast!</string>

   5:     <string name="app_name">ButtonToast</string>

   6:     <string name="strPressMe">請按我</string>

   7:     <string name="strExit">離開</string>

   8:  

   9: </resources>