Android:手机重启后设置闹钟/提醒

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【中文标题】Android:手机重启后设置闹钟/提醒【英文标题】:Android: set alarm/reminder after phone reboot 【发布时间】:2020-05-07 14:44:17 【问题描述】:

我正在开发一款集成了提醒功能的 android 应用。 如果手机保持打开状态,通知就会起作用,但是当我将其关闭或重新启动时,我会丢失所有警报。 我知道这是和Android功能一起提高手机效率,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:

AlarmService.java

AlarmReceiver.java

BootAlarmReceiver.java

AndroidManifest.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。 当从 AlarmManager 发出警报时调用“AlarmReceiver.java”。

代码如下:

AlarmService.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();
            
        
    

AlarmReceiver.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());
        
    

BootAlarmReceiver.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");
            
        
    

AndroidManifest.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>

请帮帮我,谢谢你的时间。

编辑

我在设备开机时发现了这个错误:

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 UidRecorda5a4cb2 u0a341 RCVR idle change:uncached procs:1 seq(0,0,0)

我该怎么办?

【问题讨论】:

哪些设备(品牌)丢失了警报? @ErenTüfekçi 我正在使用我的物理设备 LG G6。然后我发现了这个错误: Unable to start receiver com.package.appname.BootAlarmReceiver: java.lang.IllegalStateException: Not allowed to start service Intent 【参考方案1】:

一些品牌正在使用额外的政策来加快启动和电池优化。例如,小米对此具有自动启动权限。如果您希望您的警报在重新启动后不间断地继续,您必须获得此权限。 (设置/应用程序/您的应用程序/自动启动)。很多厂家都有这样的。

你能做什么?

您可以通过编程方式请求自动启动权限,或请求忽略电池优化权限。

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

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

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

这些问题/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您的服务。

您必须谷歌“如何在 LG6 中将您的应用列入白名单”和“如何获得 LG 的自动启动权限”。因为这个问题与品牌和设备有关。我不可能确切地告诉你应该做什么。

即使您说您检查了所有内容,也缺少权限

【讨论】:

谢谢,现在我来看看这些主题,如果可行,我会告诉你 我检查了所有内容,我的应用程序拥有开机启动的所有权限...我仍然不知道该怎么办。【参考方案2】:

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运行良好,问题出在我设备的操作系统中,从 Android OS Oreo 开始服务的命令已更改并且需要新的命令语法:

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 Oreo 或更新版本上运行,则应使用 .startForegroundService(yourIntent),否则应使用 .startService(yourIntent)

这个解决方案应该也适合你。

【讨论】:

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