安卓:手机重启后设置闹钟/提醒

Question

我正在开发一个集成了提醒功能的Android应用程序。 如果手机保持开机状态，通知会起作用，但是当我将其关闭或重新启动时，我丢失了所有闹钟。 我知道这是和Android功能提高手机效率，但我不知道该怎么办，我该如何解决这个问题？

这是我的文件：

• 报警服务.java

• 报警接收器.java

• 引导警报接收器.java

• 安卓清单.xml

"AlarmService.java"在手机开机时由"BootAlarmReceiver.java"调用，它应该(但它没有(重新加载我所有的警报。 "AlarmReceiver.java"在从 AlarmManager 触发警报时调用。

这里的代码：

报警服务.java

public class AlarmService extends IntentService {
public AlarmService() {
super("AlarmService");
}
@Override
protected void onHandleIntent(@Nullable Intent intent) {
Calendar calendar = Calendar.getInstance();
FileInputStream fileInputStream = null;
int requestCode, year, month, day, hour, minute;
String note, with;
try {
fileInputStream = openFileInput("my_alarms.csv");
InputStreamReader inputStreamReader = new InputStreamReader(fileInputStream);
BufferedReader bufferedReader = new BufferedReader(inputStreamReader);
String row;
while ((row = bufferedReader.readLine()) != null) {
String[] splittedRow = row.split(";");
requestCode = Integer.valueOf(splittedRow[0]);
year = Integer.valueOf(splittedRow[1]);
month = Integer.valueOf(splittedRow[2]);
day = Integer.valueOf(splittedRow[3]);
hour = Integer.valueOf(splittedRow[4]);
minute = Integer.valueOf(splittedRow[5]);
note = splittedRow[6];
with = splittedRow[7];
calendar.set(Calendar.YEAR, year);
calendar.set(Calendar.MONTH, month);
calendar.set(Calendar.DAY_OF_MONTH, day);
calendar.set(Calendar.HOUR_OF_DAY, hour);
calendar.set(Calendar.MINUTE, minute);
calendar.set(Calendar.SECOND, 0);
AlarmManager alarmManager = (AlarmManager) getSystemService(Context.ALARM_SERVICE);
Intent alarmIntent = new Intent(this, AlarmReceiver.class);
alarmIntent.putExtra("note", note + "nCon: " + with);
alarmIntent.putExtra("title", "My Memo");
alarmIntent.putExtra("alarm", "memo");
//requestCode must be incremental to create multiple reminders
PendingIntent pendingIntent = PendingIntent.getBroadcast(this, requestCode, alarmIntent, 0);
if (calendar.before(Calendar.getInstance())) {
calendar.add(Calendar.DATE, 1);
}
alarmManager.set(AlarmManager.RTC_WAKEUP, calendar.getTimeInMillis(), pendingIntent);
}
} catch (IOException e) {
e.printStackTrace();
} finally {
if (fileInputStream != null) {
try {
fileInputStream.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
}

}

报警接收器.java

public class AlarmReceiver extends BroadcastReceiver {
@RequiresApi(api = Build.VERSION_CODES.O)
@Override
public void onReceive(Context context, Intent intent) {
if (intent.getStringExtra("alarm").equals("memo")) {
NotificationManager notificationManager = (NotificationManager) context.getSystemService(Context.NOTIFICATION_SERVICE);
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
@SuppressLint("WrongConstant") NotificationChannel notificationChannel = new NotificationChannel("memo_channel", "My Memo", NotificationManager.IMPORTANCE_MAX);
notificationChannel.setDescription("Memo Notification Channel");
notificationChannel.enableLights(true);
notificationChannel.setLightColor(Color.BLUE);
notificationChannel.setVibrationPattern(new long[]{0, 1000, 500, 1000});
notificationChannel.enableVibration(true);
notificationManager.createNotificationChannel(notificationChannel);
}
NotificationCompat.Builder notificationBuilder = new NotificationCompat.Builder(context, "memo_channel");
notificationBuilder.setAutoCancel(true)
.setDefaults(Notification.DEFAULT_ALL)
.setWhen(System.currentTimeMillis())
.setShowWhen(true)
.setTicker("Reminder")
.setContentTitle("Memo")
.setContentText(intent.getStringExtra("note"))
.setContentInfo("Information")
.setSmallIcon(R.drawable.ic_alarm);
notificationManager.notify(1, notificationBuilder.build());
}
}
}

引导警报接收器.java

public class BootAlarmReceiver extends BroadcastReceiver {
@RequiresApi(api = Build.VERSION_CODES.O)
@Override
public void onReceive(Context context, Intent intent) {
Intent alarmServiceIntent = new Intent(context, AlarmService.class);
ComponentName service = context.startService(alarmServiceIntent);
if (service == null) {
Log.e("ALARM", "Could not start service");
} else {
Log.e("ALARM", "Could start service");
}
}
}
}

安卓清单.xml

<manifest>
<application>
<uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED" />
<uses-permission android:name="android.permission.VIBRATE" />
//Other code here
<receiver
android:name=".BootAlarmReceiver"
android:enabled="true">
<intent-filter>
<action android:name="android.intent.action.BOOT_COMPLETED" />
</intent-filter>
</receiver>
<receiver android:name=".AlarmReceiver" />
<service android:name=".AlarmService" />
</application>
</manifest>

请帮助我，谢谢你的时间。

编辑

我在设备打开时发现此错误：

java.lang.RuntimeException: Unable to start receiver com.package.appname.BootAlarmReceiver: java.lang.IllegalStateException: Not allowed to start service Intent { act=REBOOT cmp=com.package.appname/.AlarmService }: app is in background uid UidRecord{a5a4cb2 u0a341 RCVR idle change:uncached procs:1 seq(0,0,0)}

我该怎么办？

Answer 1

解决方案：

大家好，我发现了我遇到的问题，我的代码是正确的并且工作正常，问题出在我的设备的操作系统中，从 Android 操作系统奥利奥开始，启动服务的命令已更改，需要一个新的命令语法：

更改在"BootAlarmReceiver.java中

以前的代码：

public class BootAlarmReceiver extends BroadcastReceiver {
@RequiresApi(api = Build.VERSION_CODES.O)
@Override
public void onReceive(Context context, Intent intent) {
Intent alarmServiceIntent = new Intent(context, AlarmService.class);
ComponentName service = context.startService(alarmServiceIntent);
if (service == null) {
Log.e("ALARM", "Could not start service");
} else {
Log.e("ALARM", "Could start service");
}
}
}
}

新代码：

public class BootAlarmReceiver extends BroadcastReceiver {
@RequiresApi(api = Build.VERSION_CODES.O)
@Override
public void onReceive(Context context, Intent intent) {
if (Intent.ACTION_BOOT_COMPLETED.equals(intent.getAction())) {
Intent alarmServiceIntent = new Intent(context, AlarmService.class);
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
context.startForegroundService(alarmServiceIntent);
} else {
context.startService(alarmServiceIntent);
}
}
}
}

因此，如果您在奥利奥或更高版本上运行，则应使用.startForegroundService(yourIntent)，否则应使用.startService(yourIntent)。

此解决方案也应该适合您。

Answer 2

一些品牌正在使用额外的策略来加快启动和电池优化。例如，小米对此具有自动启动权限。如果您希望警报在重新启动后继续而不会中断，则必须授予您此权限。(设置/应用程序/您的应用程序/自动启动(。许多制造商都有这样的东西。

你能做什么？

您可以通过编程方式请求自动启动权限，也可以请求忽略电池优化权限。

https://stackoverflow.com/a/47307864/11982611

https://stackoverflow.com/a/49167712/11982611

https://stackoverflow.com/a/54325917/11982611

这些是一些问题/答案会对您有所帮助

编辑 ：您的日志显示您无权在启动完成后启动服务。

您必须谷歌"如何在LG6中将您的应用程序列入白名单"和"如何获得LG的自动启动权限"。因为此问题与品牌和设备有关。我不可能确切地说出你应该做什么。

即使你说你检查了所有内容，权限也缺少一些东西