Java tutorial
/* * Copyright 2014 Uwe Trottmann * * 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. */ package com.battlelancer.seriesguide.ui.dialogs; import android.content.OperationApplicationException; import com.battlelancer.seriesguide.provider.SeriesGuideContract.Episodes; import com.battlelancer.seriesguide.provider.SeriesGuideContract.ListItems; import com.battlelancer.seriesguide.provider.SeriesGuideContract.Lists; import com.battlelancer.seriesguide.provider.SeriesGuideContract.Seasons; import com.battlelancer.seriesguide.provider.SeriesGuideContract.Shows; import com.battlelancer.seriesguide.provider.SeriesGuideDatabase.Tables; import com.battlelancer.seriesguide.ui.SeriesGuidePreferences; import com.battlelancer.seriesguide.util.DBUtils; import com.battlelancer.seriesguide.util.SeasonTools; import com.battlelancer.seriesguide.util.Utils; import com.battlelancer.seriesguide.R; import android.content.ContentProviderOperation; import android.content.ContentValues; import android.content.Context; import android.database.Cursor; import android.net.Uri; import android.os.Bundle; import android.support.v4.app.DialogFragment; import android.support.v4.app.Fragment; import android.support.v4.app.FragmentManager; import android.support.v4.app.FragmentTransaction; import android.support.v4.app.LoaderManager; import android.support.v4.content.CursorLoader; import android.support.v4.content.Loader; import android.support.v4.widget.CursorAdapter; import android.text.TextUtils; import android.util.SparseBooleanArray; import android.view.LayoutInflater; import android.view.View; import android.view.View.OnClickListener; import android.view.ViewGroup; import android.widget.AdapterView; import android.widget.AdapterView.OnItemClickListener; import android.widget.Button; import android.widget.Checkable; import android.widget.CheckedTextView; import android.widget.ListView; import android.widget.TextView; import java.util.ArrayList; import timber.log.Timber; /** * Displays a dialog displaying all lists, allowing to add the given show, season or episode to any * number of them. */ public class ListsDialogFragment extends DialogFragment implements LoaderManager.LoaderCallbacks<Cursor>, OnItemClickListener { public static ListsDialogFragment newInstance(String itemId, int itemType) { ListsDialogFragment f = new ListsDialogFragment(); Bundle args = new Bundle(); args.putString("itemid", itemId); args.putInt("itemtype", itemType); f.setArguments(args); return f; } private ListView mListView; private ListsAdapter mAdapter; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); // hide title, use custom theme if (SeriesGuidePreferences.THEME == R.style.AndroidTheme) { setStyle(STYLE_NO_TITLE, 0); } else { setStyle(STYLE_NO_TITLE, R.style.SeriesGuideTheme_Dialog); } } @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { final View layout = inflater.inflate(R.layout.list_dialog, null); // buttons Button dontAddButton = (Button) layout.findViewById(R.id.buttonNegative); dontAddButton.setText(android.R.string.cancel); dontAddButton.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { dismiss(); } }); Button addButton = (Button) layout.findViewById(R.id.buttonPositive); addButton.setText(android.R.string.ok); addButton.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { // add item to selected lists String itemId = getArguments().getString("itemid"); int itemType = getArguments().getInt("itemtype"); SparseBooleanArray checkedLists = mAdapter.getCheckedPositions(); final ArrayList<ContentProviderOperation> batch = com.uwetrottmann.androidutils.Lists .newArrayList(); for (int position = 0; position < mAdapter.getCount(); position++) { final Cursor listEntry = (Cursor) mAdapter.getItem(position); boolean wasListChecked = !TextUtils.isEmpty(listEntry.getString(ListsQuery.LIST_ITEM_ID)); boolean isListChecked = checkedLists.get(position); String listId = listEntry.getString(ListsQuery.LIST_ID); String listItemId = ListItems.generateListItemId(itemId, itemType, listId); if (wasListChecked && !isListChecked) { // remove from list batch.add( ContentProviderOperation.newDelete(ListItems.buildListItemUri(listItemId)).build()); } else if (!wasListChecked && isListChecked) { // add to list ContentValues values = new ContentValues(); values.put(ListItems.LIST_ITEM_ID, listItemId); values.put(ListItems.ITEM_REF_ID, itemId); values.put(ListItems.TYPE, itemType); values.put(Lists.LIST_ID, listId); batch.add(ContentProviderOperation.newInsert(ListItems.CONTENT_URI).withValues(values) .build()); } } // apply ops try { DBUtils.applyInSmallBatches(getActivity(), batch); } catch (OperationApplicationException e) { Timber.e("Applying list changes failed", e); } getActivity().getContentResolver().notifyChange(ListItems.CONTENT_WITH_DETAILS_URI, null); dismiss(); } }); // lists list mListView = (ListView) layout.findViewById(R.id.list); /* * As using CHOICE_MODE_MULTIPLE does not seem to work before Jelly * Bean, do everything ourselves. */ mListView.setOnItemClickListener(this); return layout; } @Override public void onActivityCreated(Bundle args) { super.onActivityCreated(args); // display item title final String itemId = getArguments().getString("itemid"); final int itemType = getArguments().getInt("itemtype"); final TextView itemTitle = (TextView) getView().findViewById(R.id.item); Uri uri = null; String[] projection = null; switch (itemType) { case 1: // show uri = Shows.buildShowUri(itemId); projection = new String[] { Shows._ID, Shows.TITLE }; break; case 2: // season uri = Seasons.buildSeasonUri(itemId); projection = new String[] { Seasons._ID, Seasons.COMBINED }; break; case 3: // episode uri = Episodes.buildEpisodeUri(itemId); projection = new String[] { Episodes._ID, Episodes.TITLE }; break; } if (uri != null && projection != null) { Cursor item = getActivity().getContentResolver().query(uri, projection, null, null, null); if (item != null && item.moveToFirst()) { if (itemType == 2) { // season just has a number, build string itemTitle.setText(SeasonTools.getSeasonString(getActivity(), item.getInt(1))); } else { // shows and episodes itemTitle.setText(item.getString(1)); } } if (item != null) { item.close(); } } mAdapter = new ListsAdapter(getActivity(), null, 0); mListView.setAdapter(mAdapter); getLoaderManager().initLoader(0, getArguments(), this); } @Override public void onStart() { super.onStart(); Utils.trackView(getActivity(), "Manage Lists Dialog"); } @Override public void onItemClick(AdapterView<?> parent, View view, int position, long id) { Checkable checkable = (Checkable) view; checkable.toggle(); mAdapter.setItemChecked(position, checkable.isChecked()); } @Override public Loader<Cursor> onCreateLoader(int id, Bundle args) { // filter for this item, but keep other lists String itemId = args.getString("itemid"); int itemType = args.getInt("itemtype"); return new CursorLoader(getActivity(), Lists.buildListsWithListItemUri(ListItems.generateListItemIdWildcard(itemId, itemType)), ListsQuery.PROJECTION, null, null, null); } @Override public void onLoadFinished(Loader<Cursor> loader, Cursor data) { mAdapter.swapCursor(data); } @Override public void onLoaderReset(Loader<Cursor> loader) { mAdapter.swapCursor(null); } private class ListsAdapter extends CursorAdapter { private LayoutInflater mInflater; private SparseBooleanArray mCheckedItems; public ListsAdapter(Context context, Cursor c, int flags) { super(context, c, flags); mInflater = LayoutInflater.from(context); mCheckedItems = new SparseBooleanArray(); } @Override public View getView(int position, View convertView, ViewGroup parent) { if (!mDataValid) { throw new IllegalStateException("this should only be called when the cursor is valid"); } if (!mCursor.moveToPosition(position)) { throw new IllegalStateException("couldn't move cursor to position " + position); } View v; if (convertView == null) { v = newView(mContext, mCursor, parent); } else { v = convertView; } CheckedTextView checkedView = (CheckedTextView) v.findViewById(android.R.id.text1); checkedView.setText(mCursor.getString(ListsQuery.NAME)); // check list entry if this item is already added to it String itemId = mCursor.getString(ListsQuery.LIST_ITEM_ID); boolean isInList = !TextUtils.isEmpty(itemId); mCheckedItems.put(position, isInList); checkedView.setChecked(isInList); return v; } @Override public void bindView(View arg0, Context arg1, Cursor arg2) { } @Override public View newView(Context context, Cursor cursor, ViewGroup parent) { return mInflater.inflate(R.layout.list_dialog_row, parent, false); } public void setItemChecked(int position, boolean value) { mCheckedItems.put(position, value); } public SparseBooleanArray getCheckedPositions() { return mCheckedItems; } } interface ListsQuery { String[] PROJECTION = new String[] { Tables.LISTS + "." + Lists._ID, Tables.LISTS + "." + Lists.LIST_ID, Lists.NAME, ListItems.LIST_ITEM_ID }; int LIST_ID = 1; int NAME = 2; int LIST_ITEM_ID = 3; } /** * Display a dialog which asks if the user wants to add the given show to one or more lists. * * @param itemId TVDb/database id of the item to add * @param itemType type of the item to add (show, season or episode) */ public static void showListsDialog(String itemId, int itemType, FragmentManager fm) { if (fm == null) { return; } // DialogFragment.show() will take care of adding the fragment // in a transaction. We also want to remove any currently showing // dialog, so make our own transaction and take care of that here. FragmentTransaction ft = fm.beginTransaction(); Fragment prev = fm.findFragmentByTag("listsdialog"); if (prev != null) { ft.remove(prev); } ft.addToBackStack(null); // Create and show the dialog. DialogFragment newFragment = ListsDialogFragment.newInstance(itemId, itemType); newFragment.show(ft, "listsdialog"); } }