ScreensAdapter.java

package com.android.launcher;

import java.util.ArrayList;
import java.util.Collections;

import android.content.Context;
import android.graphics.Bitmap;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.Gallery;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.RelativeLayout;

public class ScreensAdapter extends BaseAdapter {
	    private Context mContext;
	    private float mWidth;
	    private float mHeight;
	    private ArrayList<CellLayout> mScreens;

	    public ScreensAdapter(Context c,int width,int height) {
	        mContext = c;
	        mWidth=width/1.6f;
	        mHeight=height/1.6f;
	    }
	    public void addScreen(CellLayout screen){
	    	if(mScreens==null)
	    		mScreens=new ArrayList<CellLayout>();
	    	mScreens.add(screen);
	    	notifyDataSetChanged();
	    }
	    public void addScreen(CellLayout screen, int position){
	    	if(mScreens==null)
	    		mScreens=new ArrayList<CellLayout>();
	    	mScreens.add(position, screen);
	    	notifyDataSetChanged();
	    }
	    public void removeScreen(int position){
	    	if(mScreens==null)
	    		return;
	    	mScreens.remove(position);
	    	notifyDataSetChanged();
	    }
	    public void swapScreens(int a, int b){
	    	if(mScreens==null)
	    		return;
	    	Collections.swap(mScreens, a, b);
	    	notifyDataSetChanged();
	    }
	    public int getCount() {
	        return mScreens.size();
	    }

	    public Object getItem(int position) {
	        return position;
	    }

	    public long getItemId(int position) {
	        return position;
	    }

	    public View getView(int position, View convertView, ViewGroup parent) {
	    	mScreens.get(position).setDrawingCacheEnabled(true);
	        Bitmap b=mScreens.get(position).getDrawingCache(true);
        	if(convertView==null){
        		convertView=new ImageView(mContext);
				((ImageView)convertView).setLayoutParams(new Gallery.LayoutParams((int)mWidth,(int)mHeight));
        		((ImageView)convertView).setBackgroundResource(R.drawable.preview_bg);
        	}
    		if(b!=null){
        		((ImageView)convertView).setScaleType(ImageView.ScaleType.CENTER_INSIDE);
    	        ((ImageView)convertView).setImageBitmap(b);
    		}
	        return convertView;
	    }
}