Add abstract SelectRecyclerFragment

2 files changed, 217 insertions, 0 deletions

diff --git a/app/src/main/java/github/daneren2005/dsub/fragments/SelectRecyclerFragment.java b/app/src/main/java/github/daneren2005/dsub/fragments/SelectRecyclerFragment.java
new file mode 100644
index 00000000..6fd56fd1
--- /dev/null
+++ b/app/src/main/java/github/daneren2005/dsub/fragments/SelectRecyclerFragment.java
@@ -0,0 +1,191 @@
+/*
+  This file is part of Subsonic.
+	Subsonic 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.
+	Subsonic 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 Subsonic. If not, see <http://www.gnu.org/licenses/>.
+	Copyright 2015 (C) Scott Jackson
+*/
+package github.daneren2005.dsub.fragments;
+
+import android.os.Bundle;
+import android.support.v4.widget.SwipeRefreshLayout;
+import android.support.v7.widget.GridLayoutManager;
+import android.support.v7.widget.LinearLayoutManager;
+import android.support.v7.widget.RecyclerView;
+import android.util.Log;
+import android.view.LayoutInflater;
+import android.view.Menu;
+import android.view.MenuInflater;
+import android.view.MenuItem;
+import android.view.View;
+import android.view.ViewGroup;
+import android.widget.AdapterView;
+import android.widget.ArrayAdapter;
+import android.widget.ListView;
+
+import java.io.Serializable;
+import java.util.ArrayList;
+import java.util.List;
+
+import github.daneren2005.dsub.R;
+import github.daneren2005.dsub.service.MusicService;
+import github.daneren2005.dsub.service.MusicServiceFactory;
+import github.daneren2005.dsub.util.BackgroundTask;
+import github.daneren2005.dsub.util.Constants;
+import github.daneren2005.dsub.util.ProgressListener;
+import github.daneren2005.dsub.util.TabBackgroundTask;
+import github.daneren2005.dsub.util.Util;
+import github.daneren2005.dsub.view.GridSpacingDecoration;
+
+public abstract class SelectRecyclerFragment<T> extends SubsonicFragment {
+	private static final String TAG = SelectRecyclerFragment.class.getSimpleName();
+	protected RecyclerView recyclerView;
+	protected RecyclerView.Adapter adapter;
+	protected BackgroundTask<List<T>> currentTask;
+	protected List<T> objects;
+	protected boolean serialize = true;
+	protected boolean largeCells;
+	protected int columns;
+
+	@Override
+	public void onCreate(Bundle bundle) {
+		super.onCreate(bundle);
+
+		if(bundle != null && serialize) {
+			objects = (List<T>) bundle.getSerializable(Constants.FRAGMENT_LIST);
+		}
+		largeCells = Util.getPreferences(context).getBoolean(Constants.PREFERENCES_KEY_LARGE_ALBUM_ART, true);
+		columns = context.getResources().getInteger(R.integer.Grid_Columns);
+	}
+
+	@Override
+	public void onSaveInstanceState(Bundle outState) {
+		super.onSaveInstanceState(outState);
+		if(serialize) {
+			outState.putSerializable(Constants.FRAGMENT_LIST, (Serializable) objects);
+		}
+	}
+
+	@Override
+	public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle bundle) {
+		rootView = inflater.inflate(R.layout.abstract_recycler_fragment, container, false);
+
+		refreshLayout = (SwipeRefreshLayout) rootView.findViewById(R.id.refresh_layout);
+		refreshLayout.setOnRefreshListener(this);
+
+		recyclerView = (RecyclerView) rootView.findViewById(R.id.fragment_recycler);
+		setupLayoutManager();
+		setupScrollList(recyclerView);
+
+		if(objects == null) {
+			refresh(false);
+		} else {
+			recyclerView.setAdapter(adapter = getAdapter(objects));
+		}
+
+		return rootView;
+	}
+	
+	@Override
+	public void onCreateOptionsMenu(Menu menu, MenuInflater menuInflater) {
+		if(!primaryFragment) {
+			return;
+		}
+
+		menuInflater.inflate(getOptionsMenu(), menu);
+	}
+	
+	@Override
+	public boolean onOptionsItemSelected(MenuItem item) {
+		return super.onOptionsItemSelected(item);
+	}
+
+	@Override
+	protected void refresh(final boolean refresh) {
+		int titleRes = getTitleResource();
+		if(titleRes != 0) {
+			setTitle(getTitleResource());
+		}
+		recyclerView.setVisibility(View.GONE);
+		
+		// Cancel current running task before starting another one
+		if(currentTask != null) {
+			currentTask.cancel();
+		}
+
+		currentTask = new TabBackgroundTask<List<T>>(this) {
+			@Override
+			protected List<T> doInBackground() throws Throwable {
+				MusicService musicService = MusicServiceFactory.getMusicService(context);
+
+				objects = new ArrayList<T>();
+
+				try {
+					objects = getObjects(musicService, refresh, this);
+				} catch (Exception x) {
+					Log.e(TAG, "Failed to load", x);
+				}
+
+				return objects;
+			}
+
+			@Override
+			protected void done(List<T> result) {
+				if (result != null && !result.isEmpty()) {
+					recyclerView.setAdapter(adapter = getAdapter(result));
+					
+					onFinishRefresh();
+					recyclerView.setVisibility(View.VISIBLE);
+				} else {
+					setEmpty(true);
+				}
+				
+				currentTask = null;
+			}
+		};
+		currentTask.execute();
+	}
+
+	public void setupLayoutManager() {
+		if(largeCells) {
+			final int columns = context.getResources().getInteger(R.integer.Grid_Columns);
+			GridLayoutManager gridLayoutManager = new GridLayoutManager(context, columns);
+
+			GridLayoutManager.SpanSizeLookup spanSizeLookup = getSpanSizeLookup();
+			if(spanSizeLookup != null) {
+				gridLayoutManager.setSpanSizeLookup(spanSizeLookup);
+			}
+			RecyclerView.ItemDecoration itemDecoration = getItemDecoration();
+			if(itemDecoration != null) {
+				recyclerView.addItemDecoration(itemDecoration);
+			}
+			recyclerView.setLayoutManager(gridLayoutManager);
+		} else {
+			LinearLayoutManager layoutManager = new LinearLayoutManager(context);
+			layoutManager.setOrientation(LinearLayoutManager.VERTICAL);
+			recyclerView.setLayoutManager(layoutManager);
+		}
+	}
+	public GridLayoutManager.SpanSizeLookup getSpanSizeLookup() {
+		return null;
+	}
+	public RecyclerView.ItemDecoration getItemDecoration() {
+		return new GridSpacingDecoration();
+	}
+
+	public abstract int getOptionsMenu();
+	public abstract RecyclerView.Adapter getAdapter(List<T> objs);
+	public abstract List<T> getObjects(MusicService musicService, boolean refresh, ProgressListener listener) throws Exception;
+	public abstract int getTitleResource();
+	
+	public void onFinishRefresh() {
+		
+	}
+}
diff --git a/app/src/main/res/layout/abstract_recycler_fragment.xml b/app/src/main/res/layout/abstract_recycler_fragment.xml
new file mode 100644
index 00000000..26c4971c
--- /dev/null
+++ b/app/src/main/res/layout/abstract_recycler_fragment.xml
@@ -0,0 +1,26 @@
+<?xml version="1.0" encoding="utf-8"?>
+<android.support.v4.widget.SwipeRefreshLayout xmlns:android="http://schemas.android.com/apk/res/android"
+	android:id="@+id/refresh_layout"
+	android:layout_width="fill_parent"
+	android:layout_height="fill_parent">
+
+	<LinearLayout
+		android:id="@+id/fragment_list_layout"
+		android:layout_width="fill_parent"
+		android:layout_height="fill_parent"
+		android:orientation="vertical" >
+
+		<View
+			android:layout_width="fill_parent"
+			android:layout_height="1px"
+			android:background="@color/dividerColor"/>
+
+		<android.support.v7.widget.RecyclerView
+			android:id="@+id/fragment_recycler"
+			android:layout_width="fill_parent"
+			android:layout_height="0dip"
+			android:layout_weight="1.0"/>
+
+		<include layout="@layout/tab_progress" />
+	</LinearLayout>
+</android.support.v4.widget.SwipeRefreshLayout>
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