问题描述
我有一个应用程序,具有运行每分钟后台服务。我希望服务唤醒设备,如果它是睡着了。我使用的是电源管理器,但该设备不醒来。任何想法,为什么?先谢谢了。
@覆盖
保护无效onHandleIntent(意向意图){
电源管理器PM =(电源管理器)getSystemService(Context.POWER_SERVICE);
PowerManager.WakeLock WL = pm.newWakeLock(PowerManager.FULL_WAKE_LOCK,
我的标签);
wl.acquire();
//做工作设备是醒着
wl.release();
}
这就是我从活动启动该服务。
//获取当前时间日历对象
日历CAL = Calendar.getInstance();
//添加5分钟到日历对象
cal.add(Calendar.MINUTE,1);
意向意图=新的意图(getApplicationContext(),AlarmReceiver.class);
intent.putExtra(alarm_message,选派优秀的交易);
//在现实中,你想拥有的一个静态变量
//请求code,而不是192837
PendingIntent发送= PendingIntent.getBroadcast(
getApplicationContext(),192837,意图,
PendingIntent.FLAG_UPDATE_CURRENT);
//获取AlarmManager服务
AlarmManager AM =(AlarmManager)getSystemService(ALARM_SERVICE);
// am.set(AlarmManager.RTC_WAKEUP,cal.getTimeInMillis(),发送方);
// 86400000 =24小时
// 43200000 =12小时
// 3600000 = 1小时
// 1800000 = 30分钟
// 300000 = 5分钟
am.setRepeating(AlarmManager.RTC_WAKEUP,cal.getTimeInMillis(),60000,发送者);
AlarmReceiver类
进口android.content.BroadcastReceiver;
进口android.content.Context;
进口android.content.Intent;
进口android.widget.Toast;
进口android.os.Bundle;
公共类AlarmReceiver扩展的BroadcastReceiver {
@覆盖
公共无效的onReceive(上下文的背景下,意图意图){
尝试 {
捆绑包= intent.getExtras();
字符串消息= bundle.getString(alarm_message);
// Toast.makeText(背景下,消息,Toast.LENGTH_SHORT).show();
意图myIntent =新的意图(背景下,
SendOutstandingTransactions.class);
myIntent.setAction(com.carefreegroup.startatboot.MyService);
context.startService(myIntent);
}赶上(例外五){
Toast.makeText(
的背景下,
有什么地方是一个错误,但我们还是收到了报警,
Toast.LENGTH_SHORT).show();
e.printStackTrace();
}
}
}
下面的类调用,我要开始活动时,该设备是睡着了。
SendOutstandingTransactions IntentService。
保护无效onHandleIntent(意向意图){
电源管理器PM =(电源管理器)getSystemService(Context.POWER_SERVICE);
PowerManager.WakeLock WL = pm.newWakeLock(PowerManager.FULL_WAKE_LOCK,
我的标签);
wl.acquire();
如果(hasMessageDisplayed == FALSE){
意图I =新的意图(这一点,DisplayMessageActivity.class);
i.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
startActivity(ⅰ);
}
wl.release();
}
@覆盖
公共无效的onDestroy(){
super.onDestroy();
电源管理器PM =(电源管理器)this.getSystemService(Context.POWER_SERVICE);
PowerManager.WakeLock WL = pm.newWakeLock(
PowerManager.PARTIAL_WAKE_LOCK,com.something.alarm);
//获取锁
如果(wl.isHeld())wl.release();
}
要么使用Commonsware的 WakefulIntentService 或者做到这一点:
类YourService扩展IntentService {
私有静态最后弦乐LOCK_NAME = YourService.class.getName()
+.Lock;
私有静态挥发WakeLock lockStatic = NULL; //通知静
同步私有静态PowerManager.WakeLock GETLOCK(上下文的背景下){
如果(lockStatic == NULL){
PowerManager的经理=(电源管理器)上下文
.getSystemService(Context.POWER_SERVICE);
lockStatic = mgr.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK,
LOCK_NAME);
lockStatic.setReferenceCounted(真正的);
}
返回(lockStatic);
}
公共静态无效startYourService(上下文ctxt,意图我){// STATIC
GETLOCK(ctxt.getApplicationContext())获得()。
ctxt.startService(ⅰ);
}
公共YourService(字符串名称){
超(名称);
setIntentRedelivery(真正的);
}
@覆盖
公众诠释onStartCommand(意向意图,诠释标志,诠释startId){
PowerManager.WakeLock锁= GETLOCK(this.getApplicationContext());
如果(lock.isHeld()||(标志&安培;!START_FLAG_REDELIVERY)= 0){
lock.acquire();
}
super.onStartCommand(意向,标志,startId);
返程(START_REDELIVER_INTENT);
}
@覆盖
保护无效onHandleIntent(意向意图){
尝试 {
//做你的事
} 最后 {
PowerManager.WakeLock锁= GETLOCK(this.getApplicationContext());
如果(lock.isHeld())lock.release();
}
}
}
和您的接收器:
捆绑包= intent.getExtras();
字符串消息= bundle.getString(alarm_message);
// Toast.makeText(背景下,消息,Toast.LENGTH_SHORT).show();
意图myIntent =新的意图(背景下,SendOutstandingTransactions.class);
myIntent.setAction(com.carefreegroup.startatboot.MyService);
YourService.startYourService(背景下,myIntent)
这实际上是从@CommonsWare WakefulIntentService(不知道的START_FLAG_REDELIVERY,我应该问这些天)
核心I've an app that has a background service running every minute. I want the service to wake the device up if it's asleep. I am using a PowerManager but the device doesn't wake up. Any ideas why? Thanks in advance.
@Override
protected void onHandleIntent(Intent intent) {
PowerManager pm = (PowerManager) getSystemService(Context.POWER_SERVICE);
PowerManager.WakeLock wl = pm.newWakeLock(PowerManager.FULL_WAKE_LOCK,
"My Tag");
wl.acquire();
// do work as device is awake
wl.release();
}
[edit1]
This is how i start the service from an Activity.
// get a Calendar object with current time
Calendar cal = Calendar.getInstance();
// add 5 minutes to the calendar object
cal.add(Calendar.MINUTE, 1);
Intent intent = new Intent(getApplicationContext(), AlarmReceiver.class);
intent.putExtra("alarm_message", "sending outstanding transactions");
// In reality, you would want to have a static variable for the
// request code instead of 192837
PendingIntent sender = PendingIntent.getBroadcast(
getApplicationContext(), 192837, intent,
PendingIntent.FLAG_UPDATE_CURRENT);
// Get the AlarmManager service
AlarmManager am = (AlarmManager) getSystemService(ALARM_SERVICE);
// am.set(AlarmManager.RTC_WAKEUP, cal.getTimeInMillis(), sender);
// 86400000 = 24 hours
// 43200000 = 12 hours
// 3600000 = 1hr
// 1800000 = 30 mins
// 300000 = 5 mins
am.setRepeating(AlarmManager.RTC_WAKEUP, cal.getTimeInMillis(),60000,sender);
AlarmReceiver class
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.widget.Toast;
import android.os.Bundle;
public class AlarmReceiver extends BroadcastReceiver {
@Override
public void onReceive(Context context, Intent intent) {
try {
Bundle bundle = intent.getExtras();
String message = bundle.getString("alarm_message");
// Toast.makeText(context, message, Toast.LENGTH_SHORT).show();
Intent myIntent = new Intent(context,
SendOutstandingTransactions.class);
myIntent.setAction("com.carefreegroup.startatboot.MyService");
context.startService(myIntent);
} catch (Exception e) {
Toast.makeText(
context,
"There was an error somewhere, but we still received an alarm",
Toast.LENGTH_SHORT).show();
e.printStackTrace();
}
}
}
The following class calls the Activity which I want to start when the device is asleep.
SendOutstandingTransactions IntentService.
protected void onHandleIntent(Intent intent) {
PowerManager pm = (PowerManager) getSystemService(Context.POWER_SERVICE);
PowerManager.WakeLock wl = pm.newWakeLock(PowerManager.FULL_WAKE_LOCK,
"My Tag");
wl.acquire();
if (hasMessageDisplayed == false) {
Intent i = new Intent(this, DisplayMessageActivity.class);
i.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
startActivity(i);
}
wl.release();
}
[edit2]
@Override
public void onDestroy() {
super.onDestroy();
PowerManager pm = (PowerManager) this.getSystemService(Context.POWER_SERVICE);
PowerManager.WakeLock wl = pm.newWakeLock(
PowerManager.PARTIAL_WAKE_LOCK, "com.something.alarm");
// Acquire the lock
if (wl.isHeld()) wl.release();
}
Either use Commonsware's WakefulIntentService or do this :
class YourService extends IntentService {
private static final String LOCK_NAME = YourService.class.getName()
+ ".Lock";
private static volatile WakeLock lockStatic = null; // notice static
synchronized private static PowerManager.WakeLock getLock(Context context) {
if (lockStatic == null) {
PowerManager mgr = (PowerManager) context
.getSystemService(Context.POWER_SERVICE);
lockStatic = mgr.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK,
LOCK_NAME);
lockStatic.setReferenceCounted(true);
}
return (lockStatic);
}
public static void startYourService(Context ctxt, Intent i) { // STATIC
getLock(ctxt.getApplicationContext()).acquire();
ctxt.startService(i);
}
public YourService(String name) {
super(name);
setIntentRedelivery(true);
}
@Override
public int onStartCommand(Intent intent, int flags, int startId) {
PowerManager.WakeLock lock = getLock(this.getApplicationContext());
if (!lock.isHeld() || (flags & START_FLAG_REDELIVERY) != 0) {
lock.acquire();
}
super.onStartCommand(intent, flags, startId);
return (START_REDELIVER_INTENT);
}
@Override
protected void onHandleIntent(Intent intent) {
try {
// do your thing
} finally {
PowerManager.WakeLock lock = getLock(this.getApplicationContext());
if (lock.isHeld()) lock.release();
}
}
}
and in your receiver :
Bundle bundle = intent.getExtras();
String message = bundle.getString("alarm_message");
// Toast.makeText(context, message, Toast.LENGTH_SHORT).show();
Intent myIntent = new Intent(context, SendOutstandingTransactions.class);
myIntent.setAction("com.carefreegroup.startatboot.MyService");
YourService.startYourService(context, myIntent)
which is actually the core from @CommonsWare WakefulIntentService (not sure about the START_FLAG_REDELIVERY, I should ask one of these days)
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