TextSearchAdapter.java

package grevian.MediaLibrary;

import android.content.ContentResolver;
import android.database.Cursor;
import android.graphics.Color;
import android.net.Uri;
import android.util.Log;
import android.view.KeyEvent;
import android.view.View;
import android.view.ViewGroup;
import android.view.View.OnKeyListener;
import android.widget.BaseAdapter;
import android.widget.EditText;
import android.widget.ListView;
import android.widget.TextView;

public class TextSearchAdapter extends BaseAdapter implements OnKeyListener {
	
	private final static String TAG = "GrevianMedia";
	private ListView _list;
	private EditText _text;
	private Uri _searchUri;
	private ContentResolver cr;
	private Cursor _cursor;
	
	public TextSearchAdapter(ListView mList, EditText mText, ContentResolver contentResolver)
	{	
		cr = contentResolver;
		
		_list = mList;
		_text = mText;
		
		_searchUri = Media.SEARCH_URI;
		Uri currentUri = _searchUri.buildUpon().appendPath( _text.getText().toString() ).build();
		_cursor = cr.query(currentUri, null, null, null, null);
		
		_text.setOnKeyListener(this);
		_list.setAdapter(this);
	}
	
	@Override
	public int getCount() {
		return _cursor.getCount();
	}

	@Override
	public Object getItem(int position) {
		_cursor.moveToPosition(position);
		return new Media(_cursor, cr);
	}

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

	@Override
	public View getView(int position, View convertView, ViewGroup parent) {
		// if the existing view is null, create it as a textview
		if ( convertView == null )
			convertView = new TextView(parent.getContext());
		
		TextView mText = (TextView)convertView;
		Media mMedia = (Media)getItem(position);
		mText.setText(mMedia.getTitle());
		
		if ( mMedia.getOwned() > 0 )
			mText.setTextColor(Color.GREEN);
		else
			mText.setTextColor(Color.RED);
				
		return mText;
	}
	
	public boolean update()
	{
		// Time and execute the search query
		long sTime = System.currentTimeMillis();

		_cursor.close(); // Close the old cursor
		Uri currentUri = _searchUri.buildUpon().appendPath( _text.getText().toString() ).build();
		_cursor = cr.query(currentUri, null, null, null, null);
		
		// Probably not needed, but doesn't hurt
		_cursor.moveToFirst();	
		
		long fTime = System.currentTimeMillis();		
		Log.i(TAG, "Search for term '" + _text.getText().toString() + "' returned " + _cursor.getCount() + " results in " + (fTime-sTime) + "ms");

		this.notifyDataSetChanged();
		return true;
	}
 
	@Override
	public boolean onKey(View v, int keyCode, KeyEvent event) {
		update();
		return false;
	}
	
}