/*
* Copyright 2011 Google Inc.
*
* 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.google.android.apps.mytracks.util;
import android.annotation.SuppressLint;
import android.content.Context;
import android.content.pm.PackageInfo;
import android.content.pm.PackageManager;
import android.content.pm.PackageManager.NameNotFoundException;
import android.os.PowerManager;
import android.os.PowerManager.WakeLock;
import android.util.Log;
/**
* Utility class for accessing basic Android functionality.
*
* @author Rodrigo Damazio
*/
public class SystemUtils {
private static final String TAG = SystemUtils.class.getSimpleName();
private SystemUtils() {}
/**
* Get the My Tracks version from the manifest.
*
* @return the version, or an empty string in case of failure.
*/
public static String getMyTracksVersion(Context context) {
try {
PackageInfo pi = context.getPackageManager()
.getPackageInfo("com.google.android.maps.mytracks", PackageManager.GET_META_DATA);
return pi.versionName;
} catch (NameNotFoundException e) {
Log.w(TAG, "Failed to get version info.", e);
return "";
}
}
/**
* Tries to acquire a partial wake lock if not already acquired. Logs errors
* and gives up trying in case the wake lock cannot be acquired.
*/
/**
* Acquire a wake lock if not already acquired.
*
* @param context the context
* @param wakeLock wake lock or null
*/
@SuppressLint("Wakelock")
public static WakeLock acquireWakeLock(Context context, WakeLock wakeLock) {
Log.i(TAG, "Acquiring wake lock.");
try {
PowerManager powerManager = (PowerManager) context.getSystemService(Context.POWER_SERVICE);
if (powerManager == null) {
Log.e(TAG, "Power manager null.");
return wakeLock;
}
if (wakeLock == null) {
wakeLock = powerManager.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, TAG);
if (wakeLock == null) {
Log.e(TAG, "Cannot create a new wake lock.");
return null;
}
}
if (!wakeLock.isHeld()) {
wakeLock.acquire();
if (!wakeLock.isHeld()) {
Log.e(TAG, "Cannot acquire wake lock.");
}
}
} catch (RuntimeException e) {
Log.e(TAG, e.getMessage(), e);
}
return wakeLock;
}
}