/*
* Copyright (C) 2010 Sergej Shafarenka, beworx.com
*
* 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.bwx.bequick.flashlight;
import static com.bwx.bequick.Constants.SDK_VERSION;
import android.app.AlarmManager;
import android.app.PendingIntent;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.SharedPreferences;
import android.content.SharedPreferences.Editor;
import android.os.Build;
import android.os.Vibrator;
import android.util.Log;
import com.bwx.bequick.Constants;
public class LedFlashlightReceiver extends BroadcastReceiver {
private static final String TAG = "qs.led";
// a callback action AlarmManager sends us periodically
private static final String ACTION_WARN = "com.bwx.bequick.WARN_FLASHLIGHT";
// UI sends this action in oder to control flashlight state (uses EXT_ENABLED)
public static final String ACTION_CONTROL_FLASHLIGHT = "com.bwx.bequick.FLASHLIGHT";
// receiver sends this event when flashlight state gets changed
public static final String ACTION_FLASHLIGHT = "com.bwx.bequick.FLASHLIGHT_STATE";
public static final String EXT_ENABLED = "enabled";
private static final String PREF_WARN_COUNT = "warn_count";
private static final int WARN_TIMEOUT = 300000; // 5 min
//private static final int WARN_TIMEOUT = 6 * 1000;
private static Flashlight FLASHLIGHT;
/**
* @param context
* @return led flashlight type or -1 if not supported
*/
public static int detectLedFlashlightType(Context context) {
Flashlight flashlight = detectFromBuild();
if (flashlight == null) { // still null, try and fail
for (int i=0; i<Flashlight.TYPES_NUMBER; i++) {
flashlight = checkFlashlight(i);
if (flashlight != null && flashlight.isSupported(context)) {
break;
}
flashlight = null;
}
}
int type = flashlight == null ? -1 /*not supported*/ : flashlight.getType();
SharedPreferences prefs = context.getSharedPreferences(Constants.PREFS_COMMON, Context.MODE_WORLD_WRITEABLE);
prefs.edit().putInt(Constants.PREF_FLASHLIGHT_TYPE, type).commit();
return type;
}
private static Flashlight detectFromBuild() {
if (SDK_VERSION >= 8 && ("sholes".equals(Build.DEVICE) /*droid*/
|| "shadow".equals(Build.BOARD) /*droidx*/
|| "droid2".equals(Build.BOARD) /*droid2*/)) {
return new Droid22Flashlight();
} else if (SDK_VERSION >= 7 &&
("U20a".equals(Build.DEVICE) || "E10a".equals(Build.DEVICE) /*X10*/ )) {
return new FroyoLedFlashlight();
}
return null;
}
private static Flashlight checkFlashlight(int item) {
try {
switch(item) {
case 0: return new HtcLedFlashlight();
case 1: return new FroyoLedFlashlight();
case 2: return new Droid22Flashlight();
case 3: return new Moto21LedFlashlight();
default: return null;
}
} catch (Exception e) {
Log.e(TAG, "led not supported", e);
return null;
}
}
private static Flashlight getFlashlight(Context context) {
if (FLASHLIGHT == null) {
synchronized(LedFlashlightReceiver.class) {
if (FLASHLIGHT == null) {
SharedPreferences prefs = context.getSharedPreferences(Constants.PREFS_COMMON, Context.MODE_WORLD_WRITEABLE);
int type = prefs.getInt(Constants.PREF_FLASHLIGHT_TYPE, -2); /* -2 means not yet detected */
if (type == -2) {
// this can happen on first start after upgrate to 1.9.4 p1
type = detectLedFlashlightType(context);
}
switch(type) {
case Flashlight.TYPE_MOTO21: FLASHLIGHT = new Moto21LedFlashlight(); break;
case Flashlight.TYPE_HTC: FLASHLIGHT = new HtcLedFlashlight(); break;
case Flashlight.TYPE_FROYO: FLASHLIGHT = new FroyoLedFlashlight(); break;
case Flashlight.TYPE_DROID22: FLASHLIGHT = new Droid22Flashlight(); break;
default: break; // stay null
}
}
}
}
return FLASHLIGHT;
}
@Override
public void onReceive(Context context, Intent intent) {
String action = intent.getAction();
if (ACTION_CONTROL_FLASHLIGHT.equals(action)) {
boolean enabled = intent.getExtras().getBoolean(EXT_ENABLED);
enableFlashlight(context, enabled);
clearWarnCounter(context);
if (enabled) {
Flashlight flashlight = getFlashlight(context);
if (flashlight != null && flashlight.isOn(context)) {
scheduleNextWarn(context);
} // otherwise do nothing (no need to update UI as it stays switched off anyway)
} else {
// cancel next warn
PendingIntent operation = getPendingIntent(context);
AlarmManager alarm = (AlarmManager) context.getSystemService(Context.ALARM_SERVICE);
alarm.cancel(operation);
//Log.d(TAG, "warn canceled");
}
} else if (ACTION_WARN.equals(action)) {
Flashlight flashlight = getFlashlight(context);
if (flashlight != null && flashlight.isOn(context)) {
int count = getWarnCount(context);
if (count > 2) {
enableFlashlight(context, false);
vibrate(context);
} else {
scheduleNextWarn(context);
vibrate(context);
}
} // else not further processing needed as flashlight is already switched off
}
}
private static void vibrate(Context context) {
Vibrator vibrator = (Vibrator) context.getSystemService(Context.VIBRATOR_SERVICE);
if (vibrator != null) vibrator.vibrate(150);
//Log.d(TAG, "vibrated");
}
private static void enableFlashlight(Context context, boolean enabled) {
// control flashlight
Flashlight flashlight = getFlashlight(context);
if (flashlight == null) return;
try {
flashlight.setOn(enabled, context);
// send event
Intent intent = new Intent(ACTION_FLASHLIGHT);
context.sendBroadcast(intent);
} catch (Exception e) {
// this can happen if flashlight stops working after a system software update
SharedPreferences props = context.getSharedPreferences(Constants.PREFS_COMMON, Context.MODE_WORLD_WRITEABLE);
props.edit().putInt(Constants.PREF_FLASHLIGHT_TYPE, 0).commit(); // screen flashlight
}
}
public static boolean isFlashlightEnabled(Context context) {
Flashlight flashlight = getFlashlight(context);
if (flashlight == null) return false;
try {
return flashlight.isOn(context);
} catch (Exception e) {
return false;
}
}
private static void scheduleNextWarn(Context context) {
PendingIntent operation = getPendingIntent(context);
AlarmManager alarm = (AlarmManager) context.getSystemService(Context.ALARM_SERVICE);
alarm.set(AlarmManager.RTC_WAKEUP, System.currentTimeMillis() + WARN_TIMEOUT, operation);
//Log.d(TAG, "next warn scheduled");
}
private static PendingIntent getPendingIntent(Context context) {
Intent i = new Intent(ACTION_WARN);
return PendingIntent.getBroadcast(context, 0, i, PendingIntent.FLAG_CANCEL_CURRENT);
}
private static int getWarnCount(Context context) {
SharedPreferences props = context.getSharedPreferences(Constants.PREFS_RUNTIME, Context.MODE_WORLD_WRITEABLE);
int count = props.getInt(PREF_WARN_COUNT, 0);
Editor editor = props.edit();
editor.putInt(PREF_WARN_COUNT, ++count);
editor.commit();
return count;
}
private static void clearWarnCounter(Context context) {
SharedPreferences props = context.getSharedPreferences(Constants.PREFS_RUNTIME, Context.MODE_WORLD_WRITEABLE);
Editor editor = props.edit();
editor.putInt(PREF_WARN_COUNT, 0);
editor.commit();
}
}