GalleryActivity.java

/*
 	LogMyNight - Android app for logging night activities. 
 	Copyright (c) 2010 Michael Greifeneder <mikegr@gmx.net>, Oliver Selinger <oliver.selinger@gmail.com>
 
    This program is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package at.madexperts.logmynight;

import java.io.File;
import java.util.Date;

import android.app.Activity;
import android.content.Context;
import android.content.Intent;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Matrix;
import android.graphics.drawable.BitmapDrawable;
import android.net.Uri;
import android.os.Bundle;
import android.provider.MediaStore;
import android.text.format.DateFormat;
import android.util.Log;
import android.view.View;
import android.view.ViewGroup;
import android.view.View.OnClickListener;
import android.widget.BaseAdapter;
import android.widget.Button;
import android.widget.GridView;
import android.widget.ImageView;
import android.widget.TextView;

public class GalleryActivity extends Activity implements OnClickListener {

	private static final String TAG = GalleryActivity.class.getName();
	SQLiteDatabase db;
	GridView gallery;
	Button button;
	ImageAdapter adapter;

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		// TODO Auto-generated method stub
		super.onCreate(savedInstanceState);
		db = new DatabaseHelper(this).getReadableDatabase();
		setContentView(R.layout.gallery);

		button = (Button) findViewById(R.id.galleryButton);
		button.setOnClickListener(this);

		gallery = (GridView) findViewById(R.id.gallery);
		adapter = new ImageAdapter(this, Utilities.getImageDirectory());
		gallery.setAdapter(adapter);
	}

	@Override
	protected void onDestroy() {
		db.close();
		super.onDestroy();
	}

	public void onClick(View v) {
		Intent intent = new Intent(this, CameraActivity.class);
		startActivityForResult(intent, 0);
	}

	public Intent useCameraIntent() {
		Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
		String filename = DateFormat.format("yyyyMMdd-kkmmss", new Date()) + ".jpg";
		intent.putExtra(MediaStore.EXTRA_OUTPUT, Uri.fromFile(new File(Utilities.getImageDirectory(), filename)));
		return intent;
	}

	@Override
	protected void onActivityResult(int requestCode, int resultCode, Intent data) {
		super.onActivityResult(requestCode, resultCode, data);
		if (requestCode == 0) {
			adapter.notifyDataSetChanged();
		}
	}

	public class ImageAdapter extends BaseAdapter {
		private Context mContext;
		private File directory;

		public ImageAdapter(Context c, File directory) {
			mContext = c;
			this.directory = directory;
		}

		public int getCount() {
			return directory.listFiles().length;
		}

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

		public long getItemId(int position) {
			return 0;
		}

		// create a new ImageView for each item referenced by the Adapter
		public View getView(int position, View convertView, ViewGroup parent) {
			View view;

			if (convertView == null) { // if it's not recycled, initialize some
				// attributes
				view = getLayoutInflater().inflate(R.layout.galleryitem, null);

			} else {
				view = convertView;
			}

			File file = directory.listFiles()[position];

			Cursor cursor = db.rawQuery(
					"SELECT name, orientation FROM pics WHERE filename = ?",
					new String[] { file.getName() });
			String name = "no name";
			int orientation = 0;
			if (cursor.moveToFirst()) {
				name = cursor.getString(cursor.getColumnIndex("name"));
				orientation = cursor.getInt(cursor
						.getColumnIndex("orientation"));
			}
			Log.d(TAG, "Read name from db:" + name + " orientation: "
					+ orientation);

			ImageView imageView = (ImageView) view
					.findViewById(R.id.galleryItemImage);
			TextView textView = (TextView) view
					.findViewById(R.id.galleryItemText);

			view.setLayoutParams(new GridView.LayoutParams(120, 140));
			imageView.setScaleType(ImageView.ScaleType.CENTER);
			imageView.setPadding(8, 8, 8, 8);

			Bitmap bm = Bitmap.createBitmap(BitmapFactory.decodeFile(file
					.getAbsolutePath()));

			// createa matrix for the manipulation
			Matrix matrix = new Matrix();

			float width = bm.getWidth();
			float height = bm.getHeight();
			float factor;
			float newWidth;
			float newHeight;
			
			factor = width / height;

			newHeight = 105;

			newWidth = factor * newHeight;
			
			// calculate the scale - in this case = 0.4f
			float scaleWidth = newWidth / width;
			float scaleHeight = newHeight / height;

			// resize the bit map
			matrix.postScale(scaleWidth, scaleHeight);

			if (orientation == 1) {								
				matrix.postRotate(90);
			} else {
				;
			}

			Log.d(TAG, "origWidth: " + width + " origHeight: " + height
					+ " factor: " + factor);
			Log.d(TAG, "newWidth: " + newWidth + " newHeight: " + newHeight);

			

			Bitmap rotatedBMP = Bitmap.createBitmap(bm, 0, 0, (int) width,
					(int) height, matrix, true);
			BitmapDrawable bmd = new BitmapDrawable(rotatedBMP);

			imageView.setImageDrawable(bmd);

			textView.setText(name);

			return view;
		}
	}

}