Gallery + GridView 实现图片与小圆点同步变化

直接上代码吧：

添加简单的自动播放功能：

        private void autoPlay(){
                //设置间隔5秒自动播放的功能
                new Thread(new Runnable(){
 
                        @Override
                        public void run() {
                                // TODO Auto-generated method stub
                                while(isAlive_){
                                        currentIndex_ = currentIndex_ % infoIds.length;
                                        infoshow_gallery.post(new Runnable(){
 
                                                @Override
                                                public void run() {
                                                        // TODO Auto-generated method stub
                                                        infoshow_gallery.setSelection(currentIndex_);
                                                }
                                                 
                                        });
                                        //更新时间间隔 5秒
                                        try {
                                                Thread.sleep(5000);
                                        } catch (InterruptedException e) {
                                                // TODO Auto-generated catch block
                                                e.printStackTrace();
                                        }
                                        currentIndex_++;
                                }
                        }
                         
                }).start();
        }

主要代码：

                infoshow_gallery.setOnItemSelectedListener(new Gallery.OnItemSelectedListener(){

                        @Override
                        public void onItemSelected(AdapterView<?> parent, View view,
                                        int position, long id) {
                                // TODO Auto-generated method stub
                                //设置当前选中的Index
                                currentIndex_ = position;
                                //改变GridView显示
                                gridviewAdapter.notifyDataSetInvalidated();
                        }

                        @Override
                        public void onNothingSelected(AdapterView<?> arg0) {
                                // TODO Auto-generated method stub
                                
                        }
                        
                });
                // Gallery OnItemClick
                infoshow_gridview.setOnItemClickListener(new OnItemClickListener() {

                        @Override
                        public void onItemClick(AdapterView<?> parent, View view, int position,
                                        long id) {
                                // TODO Auto-generated method stub
                                //设置当前选中的Index
                                currentIndex_ = position;
                                //改变GridView显示
                                gridviewAdapter.notifyDataSetInvalidated();
                                //改变Gallery显示
                                infoshow_gallery.setSelection(currentIndex_);
                        }
                        
                });

GridView适配器：

                public View getView(int position, View convertView, ViewGroup parent) {
                        // TODO Auto-generated method stub
                        ImageView img = new ImageView(context_);
                        img.setLayoutParams(new GridView.LayoutParams(GridView.LayoutParams.WRAP_CONTENT, 
                                        GridView.LayoutParams.WRAP_CONTENT));
                        //红球表示选中状态
                        if(position == currentIndex_){
                                img.setImageResource(thumbIds[0]);
                        }else{
                                img.setImageResource(thumbIds[1]);
                        }
                        img.setScaleType(ScaleType.FIT_CENTER);
                        return img;
                }

Gallery适配器：

        public View getView(int position, View convertView, ViewGroup parent) {
                        // TODO Auto-generated method stub
                        ImageView img = new ImageView(context_);
                        //此处每个ImageView都要占全部空间
                        img.setLayoutParams(new Gallery.LayoutParams(Gallery.LayoutParams.FILL_PARENT, 
                                        Gallery.LayoutParams.FILL_PARENT));
                        img.setImageResource(infoIds[position]);
                        img.setScaleType(ScaleType.FIT_XY);
                        return img;
                }