Androidが開発したThread+Handlerの例(地鼠を打つ)

ダイレクトコード

package com.mingrisoft;

import java.util.Random;

import android.app.Activity;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.view.MotionEvent;
import android.view.View;
import android.view.View.OnTouchListener;
import android.widget.ImageView;
import android.widget.Toast;

public class MainActivity extends Activity {
	private int i = 0; //           
	private ImageView mouse; //     ImageView  
	private Handler handler; //     Handler  
	public int[][] position = new int[][] { { 231, 325 }, { 424, 349 },
			{ 521, 256 }, { 543, 296 }, { 719, 245 }, { 832, 292 },
			{ 772, 358 } }; //              

	@Override
	public void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.main);
		mouse = (ImageView) findViewById(R.id.imageView1); //   ImageView  
		mouse.setOnTouchListener(new OnTouchListener() {

			@Override
			public boolean onTouch(View v, MotionEvent event) {
				v.setVisibility(View.INVISIBLE); //        
				i++;
				Toast.makeText(MainActivity.this, "  [ " + i + " ]   ！",
						Toast.LENGTH_SHORT).show(); //        
				return false;
			}
		});

		handler = new Handler() {
			@Override
			public void handleMessage(Message msg) {
				int index = 0;
				if (msg.what == 0x101) {
					index = msg.arg1; //        
					mouse.setX(position[index][0]); //   X   
					mouse.setY(position[index][1]); //   Y   
					mouse.setVisibility(View.VISIBLE); //       
				}
				super.handleMessage(msg);
			}

		};
		Thread t = new Thread(new Runnable() {

			@Override
			public void run() {
				int index = 0; //               
				while (!Thread.currentThread().isInterrupted()) {
					index = new Random().nextInt(position.length); //        
					Message m = handler.obtainMessage(); //     Message
					m.what = 0x101; //       
					m.arg1 = index; //            
					handler.sendMessage(m); //     

					try {
						Thread.sleep(new Random().nextInt(500) + 500); //       
					} catch (InterruptedException e) {
						e.printStackTrace();
					}

				}

			}

		});
		t.start(); //     

	}

}

レイアウトファイル:

<?xml version="1.0" encoding="utf-8"?>
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/fl"
    android:background="@drawable/background"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent">
    <ImageView
        android:id="@+id/imageView1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:src="@drawable/mouse" />
</FrameLayout>