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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