AppListCursorAdapter.java

/*
 * Copyright 2011, Institute of Cybernetics at Tallinn University of Technology
 *
 * 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 ee.ioc.phon.android.speak;

import ee.ioc.phon.android.speak.provider.App;
import ee.ioc.phon.android.speak.provider.Grammar;
import ee.ioc.phon.android.speak.provider.Server;
import ee.ioc.phon.android.speak.utils.Utils;

import android.content.Context;
import android.content.SharedPreferences;
import android.content.pm.PackageManager;
import android.content.pm.PackageManager.NameNotFoundException;
import android.database.Cursor;
import android.graphics.drawable.Drawable;
import android.preference.PreferenceManager;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.CursorAdapter;
import android.widget.ImageView;
import android.widget.TextView;

/**
 * <p>Frontend that merges data from three database tables (Apps, Grammars, Servers)
 * and presents it in one list.</p>
 * 
 * @author Kaarel Kaljurand
 */
public class AppListCursorAdapter extends CursorAdapter {

	private String mDefaultServerUrl;
	private PackageManager mPm;

	public AppListCursorAdapter(Context context, Cursor c, boolean autoRequery) {
		super(context, c, autoRequery);
		SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(context);
		mDefaultServerUrl = prefs.getString(context.getString(R.string.keyHttpServer), context.getString(R.string.defaultHttpServer));
		mPm = context.getPackageManager();
	}


	@Override
	public void bindView(View view, Context context, Cursor c) {
		String packageName = c.getString(c.getColumnIndex(App.Columns.FNAME));

		String label = "";
		Drawable icon = null;
		try {
			label = mPm.getApplicationLabel(mPm.getApplicationInfo(packageName, 0)).toString();
			icon = mPm.getApplicationIcon(packageName);
		} catch (NameNotFoundException e) { }

		// App label which can be "" if the app has been uninstalled.
		TextView itemAppName = (TextView) view.findViewById(R.id.itemAppName);
		itemAppName.setText(label);

		// App package name (comes from the DB)
		TextView itemAppFname = (TextView) view.findViewById(R.id.itemAppFname);
		itemAppFname.setText(packageName);

		// App usage count (comes from the DB)
		TextView itemAppCount = (TextView) view.findViewById(R.id.itemAppCount);
		itemAppCount.setText(String.valueOf(c.getInt(c.getColumnIndex(App.Columns.COUNT))));

		// App icon (can be null if the app has been uninstalled)
		ImageView itemAppIcon = (ImageView) view.findViewById(R.id.itemAppIcon);
		if (icon == null) {
			itemAppIcon.setVisibility(View.INVISIBLE);
		} else {
			itemAppIcon.setVisibility(View.VISIBLE);
			itemAppIcon.setImageDrawable(icon);
		}

		// Grammar URL assigned to the app (comes from the DB)
		TextView itemAppGrammar = (TextView) view.findViewById(R.id.itemAppGrammar);
		TextView itemAppGrammarTargetLang = (TextView) view.findViewById(R.id.itemAppGrammarTargetLang);
		long grammarId = c.getLong(c.getColumnIndex(App.Columns.GRAMMAR));

		String grammarUrl = Utils.idToValue(context, Grammar.Columns.CONTENT_URI, Grammar.Columns._ID, Grammar.Columns.URL, grammarId);
		String grammarTargetLang = Utils.idToValue(context, Grammar.Columns.CONTENT_URI, Grammar.Columns._ID, Grammar.Columns.LANG, grammarId);

		if (grammarUrl == null) {
			// This can happen in two cases:
			// 1. The app has not been assigned a grammar
			// 2. The app had a grammar but it was deleted
			// (with a foreign key constraint in place the 2nd option would
			// merged into the 1st, but until then we would simply have
			// an id that can never apply anymore).
			itemAppGrammar.setVisibility(View.GONE);
			itemAppGrammarTargetLang.setVisibility(View.GONE);
		} else if (grammarUrl.length() == 0) {
			// This can happen if the user wants to use unrestricted
			// input with this app, and has assigned a grammar URL which
			// is an empty string. This this case the target language makes no sense.
			itemAppGrammar.setVisibility(View.VISIBLE);
			itemAppGrammarTargetLang.setVisibility(View.GONE);
			itemAppGrammar.setText(context.getString(R.string.entryGrammarName1));
		} else {
			itemAppGrammar.setVisibility(View.VISIBLE);
			itemAppGrammarTargetLang.setVisibility(View.VISIBLE);
			itemAppGrammar.setText(grammarUrl);
			itemAppGrammarTargetLang.setText(grammarTargetLang);
		}

		// Server URL assigned to the app (comes from the DB)
		TextView itemAppServer = (TextView) view.findViewById(R.id.itemAppServer);
		long serverId = c.getLong(c.getColumnIndex(App.Columns.SERVER));

		String serverUrl = Utils.idToValue(context, Server.Columns.CONTENT_URI, Server.Columns._ID, Server.Columns.URL, serverId);

		if (serverUrl == null) {
			itemAppServer.setVisibility(View.GONE);
		} else {
			itemAppServer.setVisibility(View.VISIBLE);
			if (serverUrl.equals(mDefaultServerUrl)) {
				itemAppServer.setTextColor(context.getResources().getColor(R.color.green3));
			} else {
				itemAppServer.setTextColor(context.getResources().getColor(R.color.orange));
			}
			itemAppServer.setText(serverUrl);
		}
	}


	@Override
	public View newView(Context context, Cursor c, ViewGroup parent) {
		LayoutInflater inflater = LayoutInflater.from(context);
		return inflater.inflate(R.layout.list_item_app, parent, false);
	}
}