207 lines
6.3 KiB
Java
207 lines
6.3 KiB
Java
/*
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* Copyright 2015 Martijn Brekhof. All rights reserved.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package org.xbmc.kore.ui;
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import android.annotation.TargetApi;
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import android.content.SharedPreferences;
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import android.os.Bundle;
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import android.preference.PreferenceManager;
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import android.support.annotation.Nullable;
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import android.support.v4.app.Fragment;
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import android.support.v4.widget.SwipeRefreshLayout;
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import android.view.LayoutInflater;
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import android.view.Menu;
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import android.view.MenuInflater;
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import android.view.MenuItem;
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import android.view.View;
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import android.view.ViewGroup;
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import android.view.ViewTreeObserver;
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import android.widget.AdapterView;
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import android.widget.BaseAdapter;
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import android.widget.GridView;
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import android.widget.TextView;
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import org.xbmc.kore.R;
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import org.xbmc.kore.Settings;
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import org.xbmc.kore.utils.LogUtils;
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import org.xbmc.kore.utils.Utils;
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import butterknife.ButterKnife;
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import butterknife.InjectView;
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public abstract class AbstractListFragment extends Fragment implements
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SwipeRefreshLayout.OnRefreshListener {
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private static final String TAG = LogUtils.makeLogTag(AbstractListFragment.class);
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private BaseAdapter adapter;
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private final String BUNDLE_SAVEDINSTANCE_LISTPOSITION = "lposition";
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private boolean gridViewUsesMultipleColumns;
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@InjectView(R.id.swipe_refresh_layout) SwipeRefreshLayout swipeRefreshLayout;
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@InjectView(R.id.list) GridView gridView;
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@InjectView(android.R.id.empty) TextView emptyView;
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abstract protected AdapterView.OnItemClickListener createOnItemClickListener();
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abstract protected BaseAdapter createAdapter();
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@Override
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public void onCreate(@Nullable Bundle savedInstanceState) {
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super.onCreate(savedInstanceState);
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adapter = createAdapter();
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}
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@TargetApi(16)
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@Nullable
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@Override
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public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
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ViewGroup root = (ViewGroup) inflater.inflate(R.layout.fragment_generic_media_list, container, false);
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ButterKnife.inject(this, root);
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swipeRefreshLayout.setOnRefreshListener(this);
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gridView.setEmptyView(emptyView);
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gridView.setOnItemClickListener(createOnItemClickListener());
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gridView.setAdapter(adapter);
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if (savedInstanceState != null) {
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final int listPosition = savedInstanceState.getInt(BUNDLE_SAVEDINSTANCE_LISTPOSITION);
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gridView.post(new Runnable() {
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@Override
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public void run() {
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gridView.setSelection(listPosition);
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}
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});
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}
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//Listener added to be able to determine if multiple-columns is at all possible for the current grid
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//We use this information to enable/disable the menu item to switch between multiple and single columns
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gridView.getViewTreeObserver().addOnGlobalLayoutListener(new ViewTreeObserver.OnGlobalLayoutListener() {
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@Override
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public void onGlobalLayout() {
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if (gridView.getNumColumns() > 1) {
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gridViewUsesMultipleColumns = true;
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}
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if (Utils.isJellybeanOrLater()) {
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gridView.getViewTreeObserver().removeOnGlobalLayoutListener(this);
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} else {
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gridView.getViewTreeObserver().removeGlobalOnLayoutListener(this);
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}
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//Make sure menu is update d if it was already created
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getActivity().invalidateOptionsMenu();
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}
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});
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setHasOptionsMenu(true);
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return root;
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}
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@Override
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public void onSaveInstanceState(Bundle outState) {
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super.onSaveInstanceState(outState);
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if (gridView != null) {
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outState.putInt(BUNDLE_SAVEDINSTANCE_LISTPOSITION, gridView.getFirstVisiblePosition());
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}
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}
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@Override
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public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
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inflater.inflate(R.menu.abstractlistfragment, menu);
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if(gridViewUsesMultipleColumns) {
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if (PreferenceManager
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.getDefaultSharedPreferences(getActivity())
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.getBoolean(Settings.KEY_PREF_SINGLE_COLUMN,
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Settings.DEFAULT_PREF_SINGLE_COLUMN)) {
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gridView.setNumColumns(1);
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adapter.notifyDataSetChanged();
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MenuItem item = menu.findItem(R.id.action_multi_single_columns);
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item.setTitle(R.string.multi_column);
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}
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} else {
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//Default number of columns for GridView is set to AUTO_FIT.
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//When this leads to a single column it is not possible
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//to switch to multiple columns. We therefore disable
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//the menu item.
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MenuItem item = menu.findItem(R.id.action_multi_single_columns);
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item.setTitle(R.string.multi_column);
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item.setEnabled(false);
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}
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super.onCreateOptionsMenu(menu, inflater);
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}
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@Override
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public boolean onOptionsItemSelected(MenuItem item) {
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switch(item.getItemId()) {
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case R.id.action_multi_single_columns:
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toggleAmountOfColumns(item);
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break;
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}
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return super.onOptionsItemSelected(item);
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}
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private void toggleAmountOfColumns(MenuItem item) {
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SharedPreferences.Editor editor = PreferenceManager
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.getDefaultSharedPreferences(getActivity()).edit();
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if (gridView.getNumColumns() == 1) {
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editor.putBoolean(Settings.KEY_PREF_SINGLE_COLUMN, false);
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item.setTitle(R.string.single_column);
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gridView.setNumColumns(GridView.AUTO_FIT);
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} else {
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editor.putBoolean(Settings.KEY_PREF_SINGLE_COLUMN, true);
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item.setTitle(R.string.multi_column);
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gridView.setNumColumns(1);
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}
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editor.apply();
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adapter.notifyDataSetChanged(); //force gridView to redraw
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}
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public void showRefreshAnimation() {
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/**
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* Fixes issue with refresh animation not showing when using appcompat library (from version 20?)
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* See https://code.google.com/p/android/issues/detail?id=77712
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*/
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swipeRefreshLayout.post(new Runnable() {
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@Override
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public void run() {
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swipeRefreshLayout.setRefreshing(true);
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}
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});
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}
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public void hideRefreshAnimation() {
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swipeRefreshLayout.setRefreshing(false);
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}
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public BaseAdapter getAdapter() {
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return adapter;
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}
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/**
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* Returns the view that is displayed when the gridview has no items to show
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* @return
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*/
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public TextView getEmptyView() {
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return emptyView;
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}
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}
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