源码 广告轮播效果源码.rar

package com.drocode.swithcer; import java.io.InputStream; import java.net.URL; import java.net.URLConnection; import java.util.List; import android.content.Context; import android.content.Intent; import android.graphics.Bitmap; import android.graphics.BitmapFactory; import android.graphics.Color; import android.net.Uri; import android.os.AsyncTask; import android.os.Handler; import android.os.Message; import android.text.Spanned; import android.text.style.URLSpan; import android.view.LayoutInflater; import android.view.View; import android.view.View.OnClickListener; import android.view.ViewGroup; import android.widget.BaseAdapter; import android.widget.Gallery; import android.widget.ImageView; import android.widget.TextView; public class ImageAdapter extends BaseAdapter{ private List<String> imageUrls; //图片地址list private Context context; private ImageAdapter self; Uri uri; Intent intent; ImageView imageView; public static Integer[] imgs = { R.drawable.one, R.drawable.two, R.drawable.three, R.drawable.four }; private String[] myuri = { "http://www.36939.net/", "http://www.36939.net/", "http://www.36939.net/", "http://www.36939.net/" }; public ImageAdapter(/*List<String> imageUrls, */Context context) { // this.imageUrls = imageUrls; this.context = context; this.self = this; } public int getCount() { return Integer.MAX_VALUE; } public Object getItem(int position) { return imageUrls.get(position % imgs.length); } public long getItemId(int position) { return position; } @SuppressWarnings("unused") private Handler mHandler = new Handler() { public void handleMessage(Message msg) { try { switch (msg.what) { case 0: { self.notifyDataSetChanged(); } break; } super.handleMessage(msg); } catch (Exception e) { } } }; public View getView(int position, View convertView, ViewGroup parent) { //Bitmap image; if(convertView==null){ convertView = LayoutInflater.from(context).inflate(R.layout.item,null); //实例化convertView Gallery.LayoutParams params = new Gallery.LayoutParams(Gallery.LayoutParams.WRAP_CONTENT,Gallery.LayoutParams.WRAP_CONTENT); convertView.setLayoutParams(params); // image = ((ImageActivity)context).imagesCache.get(imageUrls.get(position % imageUrls.size())); //从缓存中读取图片 /* if(image==null){ //当缓存中没有要使用的图片时，先显示默认的图片 image = ((ImageActivity)context).imagesCache.get("background_non_load"); //异步加载图片 LoadImageTask task = new LoadImageTask(convertView); task.execute(imageUrls.get(position % imageUrls.size())); } */ convertView.setTag(imgs); } else{ //image = (Bitmap) convertView.getTag(); } // TextView textView = (TextView) convertView.findViewById(R.id.gallery_text); // textView.setText(position % imgs.length+" sdfsdfdsfdf"); // textView.setBackgroundColor(Color.argb(200, 135, 135, 152)); imageView = (ImageView) convertView.findViewById(R.id.gallery_image); imageView.setImageResource(imgs[position % imgs.length]); //设置缩放比例：保持原样 imageView.setScaleType(ImageView.ScaleType.FIT_XY); // textView.setText(position % imgs.length+" sdfsdfdsfdf"); ((ImageActivity)context).changePointView(position % imgs.length); /* imageView.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { // TODO Auto-generated method stub //((String) imageView).setSpan(new URLSpan("http://www.36939.net/"), 13, 15,Spanned.SPAN_EXCLUSIVE_EXCLUSIVE); } });*/ return convertView; } /* //加载图片的异步任务 class LoadImageTask extends AsyncTask<String,Void,Bitmap>{ private View resultView; LoadImageTask(View resultView) { this.resultView = resultView; } // doInBackground完成后才会被调用 @Override protected void onPostExecute(Bitmap bitmap) { //调用setTag保存图片以便于自动更新图片 resultView.setTag(bitmap); } //从网上下载图片 @Override protected Bitmap doInBackground(String... params) { Bitmap image=null; try { //new URL对象 把网址传入 URL url = new URL(params[0]); //取得链接 URLConnection conn = url.openConnection(); conn.connect(); //取得返回的InputStream InputStream is = conn.getInputStream(); //将InputStream变为Bitmap image = BitmapFactory.decodeStream(is); is.close(); ((ImageActivity)context).imagesCache.put(params[0],image); //把下载好的图片保存到缓存中 Message m = new Message(); m.what = 0; mHandler.sendMessage(m); } catch (Exception e) { e.printStackTrace(); } return image; } } */ }