ThemeListAdapter.java

package openeclairupdaterapp.listadapters;

import java.util.List;

import openeclairupdaterapp.customTypes.ThemeList;
import openeclairupdaterapp.misc.Constants;
import org.openeclair.update.R;

import android.content.Context;
import android.graphics.Color;
import android.graphics.drawable.Drawable;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.ImageView;
import android.widget.TextView;

public class ThemeListAdapter<T> extends ArrayAdapter<T>
{
	private final Context _context;

	public ThemeListAdapter(Context context, int textViewResourceId, List<T> objects)
	{
		super(context, textViewResourceId, objects);
		_context = context;
	}

	public View getDropDownView(int position, View convertView, ViewGroup parent)
	{
		return getView(position, convertView, parent);
	}

	public View getView(int position, View convertView, ViewGroup parent)
	{
		View row = convertView;
		ThemeListViewWrapper wrapper=null;
		if (row == null)
		{
			LayoutInflater inflater = (LayoutInflater)_context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
			row = inflater.inflate(R.layout.itemtemplate_themelist, null);
			wrapper = new ThemeListViewWrapper(row);
			row.setTag(wrapper);
		}
		else
		{
			wrapper = (ThemeListViewWrapper)row.getTag();
		}

    	ThemeList info = (ThemeList) this.getItem(position);
    	wrapper.getThemeNameView().setText(info.name);
    	wrapper.getThemeUriView().setText(info.url.toString());
    	if (!info.enabled)
    	{
    		wrapper.getImageDrawable().mutate().setAlpha(Constants.THEME_LIST_ITEM_DISABLED_ALPHA);
    		wrapper.getThemeNameView().setTextColor(Color.GRAY);
    		wrapper.getThemeUriView().setTextColor(Color.GRAY);
    	}
    	//We need an else if otherwise the disabled themes will also be yellow
    	else if (info.featured)
    	{
    		//Mark featured Themes
    		wrapper.getThemeNameView().setTextColor(Color.YELLOW);
    		wrapper.getThemeUriView().setTextColor(Color.YELLOW);
    	}
    	else
    	{
    		wrapper.getThemeNameView().setTextColor(Color.WHITE);
    		wrapper.getThemeUriView().setTextColor(Color.WHITE);
    	}
        return row;
   }
}

//Class that Holds the Ids, so we have not to call findViewById each time which costs a lot of ressources
class ThemeListViewWrapper
{
	private View base;
	private TextView ThemeListName = null;
	private TextView ThemeListUri = null;
	private ImageView image = null;
	private Drawable imageDrawable = null;

	public ThemeListViewWrapper(View base)
	{
		this.base = base;
	}

	public TextView getThemeNameView()
	{
		if (ThemeListName == null)
		{
			ThemeListName = (TextView)base.findViewById(R.id.txtThemeName);
		}
		return ThemeListName;
	}

	public TextView getThemeUriView()
	{
		if (ThemeListUri == null)
		{
			ThemeListUri = (TextView)base.findViewById(R.id.txtThemeUri);
		}
		return ThemeListUri;
	}

	public ImageView getImage()
	{
		if (image == null)
		{
			image = (ImageView)base.findViewById(R.id.ThemeListImage);
		}
		return image;
	}

	public Drawable getImageDrawable()
	{
		if (image == null)
			getImage();
		if (imageDrawable == null)
		{
			imageDrawable = image.getDrawable();
		}
		return imageDrawable;
	}
}