/*
* Copyright (C) 2012 The Android Open Source Project
*
* 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.android.launcher3;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.util.Log;
import java.io.*;
import java.util.ArrayList;
public class Stats {
private static final boolean DEBUG_BROADCASTS = false;
private static final String TAG = "Launcher3/Stats";
private static final boolean LOCAL_LAUNCH_LOG = true;
public static final String ACTION_LAUNCH = "com.android.launcher3.action.LAUNCH";
public static final String EXTRA_INTENT = "intent";
public static final String EXTRA_CONTAINER = "container";
public static final String EXTRA_SCREEN = "screen";
public static final String EXTRA_CELLX = "cellX";
public static final String EXTRA_CELLY = "cellY";
private static final int LOG_VERSION = 1;
private static final int LOG_TAG_VERSION = 0x1;
private static final int LOG_TAG_LAUNCH = 0x1000;
private static final int STATS_VERSION = 1;
private static final int INITIAL_STATS_SIZE = 100;
// TODO: delayed/batched writes
private static final boolean FLUSH_IMMEDIATELY = true;
private final Launcher mLauncher;
private final String mLaunchBroadcastPermission;
DataOutputStream mLog;
ArrayList<String> mIntents;
ArrayList<Integer> mHistogram;
public Stats(Launcher launcher) {
mLauncher = launcher;
mLaunchBroadcastPermission =
launcher.getResources().getString(R.string.receive_launch_broadcasts_permission);
loadStats();
if (LOCAL_LAUNCH_LOG) {
try {
mLog = new DataOutputStream(mLauncher.openFileOutput(
LauncherFiles.LAUNCHES_LOG, Context.MODE_APPEND));
mLog.writeInt(LOG_TAG_VERSION);
mLog.writeInt(LOG_VERSION);
} catch (FileNotFoundException e) {
Log.e(TAG, "unable to create stats log: " + e);
mLog = null;
} catch (IOException e) {
Log.e(TAG, "unable to write to stats log: " + e);
mLog = null;
}
}
if (DEBUG_BROADCASTS) {
launcher.registerReceiver(
new BroadcastReceiver() {
@Override
public void onReceive(Context context, Intent intent) {
Log.v("Stats", "got broadcast: " + intent + " for launched intent: "
+ intent.getStringExtra(EXTRA_INTENT));
}
},
new IntentFilter(ACTION_LAUNCH),
mLaunchBroadcastPermission,
null
);
}
}
public void incrementLaunch(String intentStr) {
int pos = mIntents.indexOf(intentStr);
if (pos < 0) {
mIntents.add(intentStr);
mHistogram.add(1);
} else {
mHistogram.set(pos, mHistogram.get(pos) + 1);
}
}
public void recordLaunch(Intent intent) {
recordLaunch(intent, null);
}
public void recordLaunch(Intent intent, ShortcutInfo shortcut) {
intent = new Intent(intent);
intent.setSourceBounds(null);
final String flat = intent.toUri(0);
Intent broadcastIntent = new Intent(ACTION_LAUNCH).putExtra(EXTRA_INTENT, flat);
if (shortcut != null) {
broadcastIntent.putExtra(EXTRA_CONTAINER, shortcut.container)
.putExtra(EXTRA_SCREEN, shortcut.screenId)
.putExtra(EXTRA_CELLX, shortcut.cellX)
.putExtra(EXTRA_CELLY, shortcut.cellY);
}
mLauncher.sendBroadcast(broadcastIntent, mLaunchBroadcastPermission);
incrementLaunch(flat);
if (FLUSH_IMMEDIATELY) {
saveStats();
}
if (LOCAL_LAUNCH_LOG && mLog != null) {
try {
mLog.writeInt(LOG_TAG_LAUNCH);
mLog.writeLong(System.currentTimeMillis());
if (shortcut == null) {
mLog.writeShort(0);
mLog.writeShort(0);
mLog.writeShort(0);
mLog.writeShort(0);
} else {
mLog.writeShort((short) shortcut.container);
mLog.writeShort((short) shortcut.screenId);
mLog.writeShort((short) shortcut.cellX);
mLog.writeShort((short) shortcut.cellY);
}
mLog.writeUTF(flat);
if (FLUSH_IMMEDIATELY) {
mLog.flush(); // TODO: delayed writes
}
} catch (IOException e) {
e.printStackTrace();
}
}
}
private void saveStats() {
DataOutputStream stats = null;
try {
stats = new DataOutputStream(mLauncher.openFileOutput(
LauncherFiles.STATS_LOG + ".tmp", Context.MODE_PRIVATE));
stats.writeInt(STATS_VERSION);
final int N = mHistogram.size();
stats.writeInt(N);
for (int i=0; i<N; i++) {
stats.writeUTF(mIntents.get(i));
stats.writeInt(mHistogram.get(i));
}
stats.close();
stats = null;
mLauncher.getFileStreamPath(LauncherFiles.STATS_LOG + ".tmp")
.renameTo(mLauncher.getFileStreamPath(LauncherFiles.STATS_LOG));
} catch (FileNotFoundException e) {
Log.e(TAG, "unable to create stats data: " + e);
} catch (IOException e) {
Log.e(TAG, "unable to write to stats data: " + e);
} finally {
if (stats != null) {
try {
stats.close();
} catch (IOException e) { }
}
}
}
private void loadStats() {
mIntents = new ArrayList<String>(INITIAL_STATS_SIZE);
mHistogram = new ArrayList<Integer>(INITIAL_STATS_SIZE);
DataInputStream stats = null;
try {
stats = new DataInputStream(mLauncher.openFileInput(LauncherFiles.STATS_LOG));
final int version = stats.readInt();
if (version == STATS_VERSION) {
final int N = stats.readInt();
for (int i=0; i<N; i++) {
final String pkg = stats.readUTF();
final int count = stats.readInt();
mIntents.add(pkg);
mHistogram.add(count);
}
}
} catch (FileNotFoundException e) {
// not a problem
} catch (IOException e) {
// more of a problem
} finally {
if (stats != null) {
try {
stats.close();
} catch (IOException e) { }
}
}
}
}