GMAndroid/app/src/main/java/com/ivalentin/margolariak/GalleryLayout.java

package com.ivalentin.margolariak;


import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.os.Bundle;
import android.app.Fragment;
import android.app.FragmentManager;
import android.app.FragmentTransaction;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.TextView;

import java.io.File;
import java.util.Random;

/**
 * Fragment of the gallery section.
 *
 * @see Fragment
 *
 * @author Iñigo Valentin
 *
 */
public class GalleryLayout extends Fragment{

	/**
	 * Run when the fragment is inflated.
	 * Assigns views, gets the date and does the first call to the {@link @populate()} function.
	 *
	 * @param inflater A LayoutInflater to manage views
	 * @param container The container View
	 * @param savedInstanceState Bundle containing the state
	 *
	 * @return The fragment view
	 *
	 * @see Fragment#onCreateView(android.view.LayoutInflater, android.view.ViewGroup, android.os.Bundle)
	 */
	@Override
	public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {

		//Load the layout
		View view = inflater.inflate(R.layout.fragment_layout_gallery, container, false);

		//Set the title
		((MainActivity) getActivity()).setSectionTitle(view.getContext().getString(R.string.menu_gallery));

		populate(view);

		return view;
	}

	/**
	 * Populates the list of activities around.
	 * It uses the default layout as parent.
	 */
	private void populate(View view){

		//Assign elements
		LinearLayout llList = (LinearLayout) view.findViewById(R.id.ll_gallery_album_list);
		LinearLayout entry;

		//An inflater
		LayoutInflater factory = LayoutInflater.from(getActivity());

		SQLiteDatabase db = SQLiteDatabase.openDatabase(getActivity().getDatabasePath(GM.DB.NAME).getAbsolutePath(), null, SQLiteDatabase.NO_LOCALIZED_COLLATORS | SQLiteDatabase.OPEN_READONLY);
		final Cursor cursor;
		String lang = GM.getLang();

		//Get data from the database
		cursor = db.rawQuery("SELECT DISTINCT album.id AS id, album.title_" + lang + " AS name FROM photo, album, photo_album WHERE photo.id = photo AND album.id = album ORDER BY uploaded DESC;", null);

		//Loop
		while (cursor.moveToNext()){

			//Create a new row
			entry = (LinearLayout) factory.inflate(R.layout.row_gallery, llList, false);

			//Set margins
			LinearLayout.LayoutParams layoutParams = new LinearLayout.LayoutParams(LinearLayout.LayoutParams.MATCH_PARENT, LinearLayout.LayoutParams.WRAP_CONTENT);
			int margin = (int) (9 * getActivity().getResources().getDisplayMetrics().density);
			layoutParams.setMargins(margin, margin, margin, margin);
			entry.setLayoutParams(layoutParams);

			//Set title
			TextView tvTitle = (TextView) entry.findViewById(R.id.tv_row_gallery_title);
			tvTitle.setText(cursor.getString(1));

			//Set hidden id
			TextView tvId = (TextView) entry.findViewById(R.id.tv_row_gallery_hidden);
			tvId.setText(cursor.getString(0));

			//Get images
			ImageView preview[] = new ImageView[4];
			preview[0] = (ImageView) entry.findViewById(R.id.iv_row_gallery_0);
			preview[1] = (ImageView) entry.findViewById(R.id.iv_row_gallery_1);
			preview[2] = (ImageView) entry.findViewById(R.id.iv_row_gallery_2);
			preview[3] = (ImageView) entry.findViewById(R.id.iv_row_gallery_3);

			//Get db rows
			Cursor cursorImage = db.rawQuery("SELECT id, file, width, height FROM photo, photo_album WHERE photo = id AND album = " + cursor.getString(0) + " ORDER BY random() LIMIT 4;", null);

			//Loop
			int i = 0;
			Random r;
			while (cursorImage.moveToNext()){
				String image = cursorImage.getString(1);

				//Check if image exists
				File f;
				f = new File(this.getActivity().getFilesDir().toString() + "/img/galeria/miniature/" + image);
				if (f.exists()){
					//If the image exists, set it.
					Bitmap myBitmap = BitmapFactory.decodeFile(this.getActivity().getFilesDir().toString() + "/img/galeria/miniature/" + image);
					preview[i].setImageBitmap(myBitmap);
				}
				else {
					//If not, create directories and download asynchronously
					File fpath;
					fpath = new File(this.getActivity().getFilesDir().toString() + "/img/galeria/miniature/");
					fpath.mkdirs();
					new DownloadImage(GM.API.SERVER + "/img/galeria/miniature/" + image, this.getActivity().getFilesDir().toString() + "/img/galeria/miniature/" + image, preview[i], GM.IMG.SIZE.MINIATURE).execute();
				}

				//Rotate the image
				r = new Random();
				int rot = r.nextInt(31) - 15;
				preview[i].setRotation(rot);

				i ++;
			}

			//Set photo counter
			Cursor cursorCounter = db.rawQuery("SELECT id FROM photo, photo_album WHERE photo = id AND album = " + cursor.getString(0) + ";", null);
			TextView tvPhotoCounter = (TextView) entry.findViewById(R.id.tv_row_gallery_counter);
			tvPhotoCounter.setText(getResources().getQuantityString(R.plurals.gallery_photo_count, cursorCounter.getCount(), cursorCounter.getCount()));

			//Close cursors
			cursorCounter.close();
			cursorImage.close();

			//Set onCLickListener
			entry.setOnClickListener(new View.OnClickListener(){
				@Override
				public void onClick(View v) {
				Fragment fragment = new AlbumLayout();
				Bundle bundle = new Bundle();

				//Pass post id
				int id = Integer.parseInt(((TextView) v.findViewById(R.id.tv_row_gallery_hidden)).getText().toString());
				bundle.putInt("album", id);
				fragment.setArguments(bundle);

				FragmentManager fm = GalleryLayout.this.getActivity().getFragmentManager();
				FragmentTransaction ft = fm.beginTransaction();

				ft.replace(R.id.activity_main_content_fragment, fragment);
				ft.addToBackStack("album_" + id);
				ft.commit();
				}
			});

			llList.addView(entry);
		}

		//Close database
		cursor.close();
		db.close();

	}
}