Java tutorial
package tech.salroid.filmy.fragment; import android.app.AlertDialog; import android.content.Context; import android.content.DialogInterface; import android.content.Intent; import android.content.res.Configuration; import android.database.Cursor; import android.os.Bundle; import android.support.v4.app.Fragment; import android.support.v4.app.LoaderManager; import android.support.v4.content.CursorLoader; import android.support.v4.content.Loader; import android.support.v7.widget.RecyclerView; import android.support.v7.widget.StaggeredGridLayoutManager; import android.view.LayoutInflater; import android.view.View; import android.view.ViewGroup; import android.widget.ArrayAdapter; import android.widget.ImageView; import android.widget.LinearLayout; import butterknife.BindView; import butterknife.ButterKnife; import tech.salroid.filmy.R; import tech.salroid.filmy.activities.MovieDetailsActivity; import tech.salroid.filmy.custom_adapter.SavedMoviesAdapter; import tech.salroid.filmy.database.FilmContract; import tech.salroid.filmy.utility.Constants; /* * Filmy Application for Android * Copyright (c) 2016 Sajal Gupta (http://github.com/salroid). * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ public class SavedMovies extends Fragment implements LoaderManager.LoaderCallbacks<Cursor>, SavedMoviesAdapter.ClickListener, SavedMoviesAdapter.LongClickListener { @BindView(R.id.my_saved_recycler) RecyclerView my_saved_movies_recycler; @BindView(R.id.emptyContainer) LinearLayout emptyContainer; @BindView(R.id.database_image) ImageView dataImageView; private static final int SAVED_DETAILS_LOADER = 3; private static final String[] GET_SAVE_COLUMNS = { FilmContract.SaveEntry.SAVE_ID, FilmContract.SaveEntry.SAVE_TITLE, FilmContract.SaveEntry.SAVE_BANNER, FilmContract.SaveEntry.SAVE_DESCRIPTION, FilmContract.SaveEntry.SAVE_TAGLINE, FilmContract.SaveEntry.SAVE_TRAILER, FilmContract.SaveEntry.SAVE_RATING, FilmContract.SaveEntry.SAVE_LANGUAGE, FilmContract.SaveEntry.SAVE_RELEASED, FilmContract.SaveEntry._ID, FilmContract.SaveEntry.SAVE_YEAR, FilmContract.SaveEntry.SAVE_CERTIFICATION, FilmContract.SaveEntry.SAVE_RUNTIME, FilmContract.SaveEntry.SAVE_POSTER_LINK, FilmContract.SaveEntry.SAVE_FLAG }; private SavedMoviesAdapter mainActivityAdapter; @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { View view = inflater.inflate(R.layout.fragment_saved_movies, container, false); ButterKnife.bind(this, view); /*GridLayoutManager gridLayoutManager = new GridLayoutManager(this, 3); my_saved_movies_recycler.setLayoutManager(gridLayoutManager);*/ boolean tabletSize = getResources().getBoolean(R.bool.isTablet); if (tabletSize) { if (getResources().getConfiguration().orientation == Configuration.ORIENTATION_PORTRAIT) { StaggeredGridLayoutManager gridLayoutManager = new StaggeredGridLayoutManager(6, StaggeredGridLayoutManager.VERTICAL); my_saved_movies_recycler.setLayoutManager(gridLayoutManager); } else { StaggeredGridLayoutManager gridLayoutManager = new StaggeredGridLayoutManager(8, StaggeredGridLayoutManager.VERTICAL); my_saved_movies_recycler.setLayoutManager(gridLayoutManager); } } else { if (getResources().getConfiguration().orientation == Configuration.ORIENTATION_PORTRAIT) { StaggeredGridLayoutManager gridLayoutManager = new StaggeredGridLayoutManager(3, StaggeredGridLayoutManager.VERTICAL); my_saved_movies_recycler.setLayoutManager(gridLayoutManager); } else { StaggeredGridLayoutManager gridLayoutManager = new StaggeredGridLayoutManager(5, StaggeredGridLayoutManager.VERTICAL); my_saved_movies_recycler.setLayoutManager(gridLayoutManager); } } mainActivityAdapter = new SavedMoviesAdapter(getActivity(), null); my_saved_movies_recycler.setAdapter(mainActivityAdapter); mainActivityAdapter.setClickListener(this); mainActivityAdapter.setLongClickListener(this); return view; } @Override public Loader<Cursor> onCreateLoader(int id, Bundle args) { String selection = FilmContract.SaveEntry.TABLE_NAME + "." + FilmContract.SaveEntry.SAVE_FLAG + "= ?"; String[] selectionArgs = { String.valueOf(Constants.FLAG_OFFLINE) }; return new CursorLoader(getActivity(), FilmContract.SaveEntry.CONTENT_URI, GET_SAVE_COLUMNS, selection, selectionArgs, "_ID DESC"); } @Override public void onLoadFinished(Loader<Cursor> loader, Cursor cursor) { if (cursor != null && cursor.getCount() > 0) mainActivityAdapter.swapCursor(cursor); else emptyContainer.setVisibility(View.VISIBLE); } @Override public void onLoaderReset(Loader<Cursor> loader) { mainActivityAdapter.swapCursor(null); emptyContainer.setVisibility(View.VISIBLE); } @Override public void itemClicked(String movieId, String title) { Intent intent = new Intent(getActivity(), MovieDetailsActivity.class); intent.putExtra("saved_database_applicable", true); intent.putExtra("network_applicable", true); intent.putExtra("title", title); intent.putExtra("id", movieId); startActivity(intent); } @Override public void itemLongClicked(final Cursor mycursor, final int position) { AlertDialog.Builder adb = new AlertDialog.Builder(getActivity()); final ArrayAdapter<String> arrayAdapter = new ArrayAdapter<>(getActivity(), android.R.layout.simple_list_item_1); arrayAdapter.add("Remove"); final Context context = getActivity(); adb.setAdapter(arrayAdapter, new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialogInterface, int i) { final String deleteSelection = FilmContract.SaveEntry.TABLE_NAME + "." + FilmContract.SaveEntry.SAVE_ID + " = ? AND " + FilmContract.SaveEntry.TABLE_NAME + "." + FilmContract.SaveEntry.SAVE_FLAG + " = ? "; int flag_index = mycursor.getColumnIndex(FilmContract.SaveEntry.SAVE_FLAG); int flag = mycursor.getInt(flag_index); final String[] deletionArgs = { mycursor.getString(mycursor.getColumnIndex(FilmContract.SaveEntry.SAVE_ID)), String.valueOf(flag) }; long deletion_id = context.getContentResolver().delete(FilmContract.SaveEntry.CONTENT_URI, deleteSelection, deletionArgs); if (deletion_id != -1) { mainActivityAdapter.notifyItemRemoved(position); if (mainActivityAdapter.getItemCount() == 1) my_saved_movies_recycler.setVisibility(View.GONE); } } }); adb.show(); } @Override public void onResume() { super.onResume(); getActivity().getSupportLoaderManager().initLoader(SAVED_DETAILS_LOADER, null, this); } }