LogsFragment.java

package com.sound.ampache.fragments;

/* Copyright (c) 2008 Kevin James Purdy <purdyk@onid.orst.edu>
 * Copyright (c) 2014 David Hrdina Nemecek <dejvino@gmail.com>
 *
 * +------------------------------------------------------------------------+
 * | This program 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 2         |
 * | of the License, or (at your option) any later version.                 |
 * |                                                                        |
 * | This program 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 this program; if not, write to the Free Software            |
 * | Foundation, Inc., 59 Temple Place - Suite 330,                         |
 * | Boston, MA  02111-1307, USA.                                           |
 * +------------------------------------------------------------------------+
 */

import android.app.Fragment;
import android.content.Context;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.BaseAdapter;
import android.widget.ListView;
import android.widget.TextView;

import com.sound.ampache.R;
import com.sound.ampache.amdroid;
import com.sound.ampache.objects.UserLogEntry;
import com.sound.ampache.service.UserLoggerListener;

import java.text.SimpleDateFormat;

public class LogsFragment extends Fragment implements AdapterView.OnItemClickListener, UserLoggerListener
{
	private View emptyView;
	private ListView listView;

	private LogsAdapter logsAdapter;

	@Override
	public void onCreate(Bundle savedInstanceState)
	{
		super.onCreate(savedInstanceState);

	}

	@Override
	public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState)
	{
		return inflater.inflate(R.layout.logs_layout, container, false);
	}

	@Override
	public void onViewCreated(View view, Bundle savedInstanceState)
	{
		super.onViewCreated(view, savedInstanceState);

		emptyView = view.findViewById(android.R.id.empty);
		listView = (ListView) view.findViewById(R.id.list);
		listView.setOnItemClickListener(this);

		logsAdapter = new LogsAdapter(getActivity());
		listView.setAdapter(logsAdapter);

		amdroid.logger.addLogListener(this);

		// Center the playlist at the current song
		centerList(0);
	}

	private void centerList(int adjust)
	{
		int playlistIndex = amdroid.playbackControl.getPlayingIndex();
		listView.setSelection(playlistIndex + adjust);
		refreshEmptyView();
	}

	@Override
	public void onDestroy()
	{
		super.onDestroy();
	}

	@Override
	public void onItemClick(AdapterView<?> adapterView, View view, int i, long l)
	{
		// nothing to do
	}

	@Override
	public void onLogEntry(UserLogEntry logEntry)
	{
		logsAdapter.refresh();
	}

	private class LogsAdapter extends BaseAdapter
	{
		private LayoutInflater mInflater;

		public LogsAdapter(Context context)
		{
			mInflater = LayoutInflater.from(context);
		}

		public int getCount()
		{
			return amdroid.logger.size();
		}

		public Object getItem(int position)
		{
			return amdroid.logger.get(position);
		}

		public long getItemId(int position)
		{
			return position;
		}

		public void refresh()
		{
			notifyDataSetChanged();
		}

		public void clearItems()
		{
			amdroid.logger.clear();
			notifyDataSetChanged();
		}

		@Override
		public boolean isEmpty()
		{
			return getCount() <= 0;
		}

		public View getView(int position, View convertView, ViewGroup parent)
		{
			listItem holder;
			UserLogEntry logEntry = amdroid.logger.get(position);

            /* we don't reuse  */
			if (convertView == null) {
				convertView = mInflater.inflate(R.layout.log_item, null);
				holder = new listItem();

				holder.timestamp = (TextView) convertView.findViewById(R.id.timestamp);
				holder.severity = (TextView) convertView.findViewById(R.id.severity);
				holder.title = (TextView) convertView.findViewById(R.id.title);
				holder.details = (TextView) convertView.findViewById(R.id.details);

				convertView.setTag(holder);
			} else {
				holder = (listItem) convertView.getTag();
			}

			holder.timestamp.setText(new SimpleDateFormat().format(logEntry.timestamp));
			holder.severity.setText(logEntry.severity.toString());
			holder.title.setText(logEntry.title);
			holder.details.setText(logEntry.details);

			int colorResource = 0;
			switch (logEntry.severity) {
				case DEBUG:
					colorResource = R.color.log_title_debug;
					break;
				case INFO:
					colorResource = R.color.log_title_info;
					break;
				case WARNING:
					colorResource = R.color.log_title_warning;
					break;
				case CRITICAL:
					colorResource = R.color.log_title_critical;
					break;
				default:
					throw new RuntimeException("Unhandled severity type: " + logEntry.severity);
			}
			holder.title.setTextColor(getResources().getColor(colorResource));

			return convertView;
		}
	}

	private static class listItem
	{
		TextView timestamp;
		TextView severity;
		TextView title;
		TextView details;
	}

	private void refreshEmptyView()
	{
		if (logsAdapter.isEmpty()) {
			emptyView.setVisibility(View.VISIBLE);
		} else {
			emptyView.setVisibility(View.GONE);
		}
	}
}