android图片轮播源码

package com.drocode.swithcer; import java.util.ArrayList; import java.util.HashMap; import java.util.List; import java.util.Timer; import java.util.TimerTask; import android.app.Activity; import android.graphics.Bitmap; import android.graphics.BitmapFactory; import android.graphics.Color; import android.os.Bundle; import android.os.Handler; import android.os.Message; import android.view.View; import android.widget.AdapterView; import android.widget.ImageView; import android.widget.LinearLayout; import android.widget.AdapterView.OnItemClickListener; public class ImageActivity extends Activity { //public HashMap<String,Bitmap> imagesCache=new HashMap<String, Bitmap>();//图片缓存 public List<String> urls ; public GuideGallery images_ga; private int positon = 0; private Thread timeThread = null; public boolean timeFlag = true; private boolean isExit = false; public ImageTimerTask timeTaks = null; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.url_connection_image); timeTaks = new ImageTimerTask(); autoGallery.scheduleAtFixedRate(timeTaks, 5000, 5000); timeThread = new Thread() { public void run() { while(!isExit) { try { Thread.sleep(1500); } catch (InterruptedException e) { // TODO Auto-generated catch block e.printStackTrace(); } synchronized (timeTaks) { if(!timeFlag){ timeTaks.timeCondition = true; timeTaks.notifyAll(); } } timeFlag = true; } }; }; timeThread.start(); } @Override protected void onStart() { // TODO Auto-generated method stub super.onStart(); init(); } private void init(){ Bitmap image= BitmapFactory.decodeResource(getResources(),R.drawable.icon); //imagesCache.put("background_non_load",image); //设置缓存中默认的图片 images_ga = (GuideGallery) findViewById(R.id.image_wall_gallery); images_ga.setImageActivity(this); ImageAdapter imageAdapter = new ImageAdapter(this); images_ga.setAdapter(imageAdapter); LinearLayout pointLinear = (LinearLayout) findViewById(R.id.gallery_point_linear); pointLinear.setBackgroundColor(Color.argb(200, 135, 135, 152)); for (int i = 0; i < 4; i++) { ImageView pointView = new ImageView(this); if(i==0){ pointView.setBackgroundResource(R.drawable.feature_point_cur); }else pointView.setBackgroundResource(R.drawable.feature_point); pointLinear.addView(pointView); } images_ga.setOnItemClickListener(new OnItemClickListener() { @Override public void onItemClick(AdapterView<?> arg0, View arg1, int arg2, long arg3) { // TODO Auto-generated method stub int nPosition = arg2; } }); } public void changePointView(int cur){ LinearLayout pointLinear = (LinearLayout) findViewById(R.id.gallery_point_linear); View view = pointLinear.getChildAt(positon); View curView = pointLinear.getChildAt(cur); if(view!=null&& curView!=null){ ImageView pointView = (ImageView)view; ImageView curPointView = (ImageView)curView; pointView.setBackgroundResource(R.drawable.feature_point); curPointView.setBackgroundResource(R.drawable.feature_point_cur); positon = cur; } } final Handler autoGalleryHandler = new Handler() { public void handleMessage(Message message) { super.handleMessage(message); switch (message.what) { case 1: images_ga.setSelection(message.getData().getInt("pos")); break; } } }; @Override protected void onResume() { // TODO Auto-generated method stub super.onResume(); timeFlag = false; } @Override protected void onPause() { // TODO Auto-generated method stub super.onPause(); timeTaks.timeCondition = false; } class ImageTimerTask extends TimerTask{ public volatile boolean timeCondition = true; int gallerypisition = 0; public void run() { synchronized (this) { while(!timeCondition) { try { Thread.sleep(100); wait(); } catch (InterruptedException e) { Thread.interrupted(); } } } try { gallerypisition = images_ga.getSelectedItemPosition() + 1; Message msg = new Message(); Bundle date = new Bundle();// 存放数据 date.putInt("pos", gallerypisition); msg.setData(date); msg.what = 1;//消息标识 autoGalleryHandler.sendMessage(msg); } catch (Exception e) { // TODO Auto-generated catch block e.printStackTrace(); } } } Timer autoGallery = new Timer(); }