如何从后台管理器显示我的屏幕警报 [英] how to show my screen alarm from background manager
问题描述
我安装了 android 警报管理器包并在后台打印代码,它运行良好.但是如何显示我的警报屏幕,例如 WhatsApp 接听电话,我可以用颤振来做到这一点吗?
I installed android alarm manager package and print code on background its work well. But how can show my alarm screen like WhatsApp receive call for example, can I do this with flutter ?
void runOnBackGround() async {
final int helloAlarmID = 0;
await AndroidAlarmManager.initialize();
await AndroidAlarmManager.periodic(
const Duration(seconds: 1), helloAlarmID, callBack,
wakeup: true);
}
void callBack(i) async {
final DateTime now = DateTime.now();
print("[$now] id = $i Hello, world! ");
}
推荐答案
就我而言,我修改了插件代码并需要一些许可.我从 geisterfurz007/random-alarm 找到了这个解决方案.它使得可以从后台显示应用程序.
Well in my case, I modified the plugin code and needed some permission. I found this solution from geisterfurz007/random-alarm. It makes can show the app from the background.
要在闹钟响起时打开应用程序,需要修改插件.
To open an app when an alarm goes off, Need to modify the plugin.
打开项目,在External Libraries/Flutter Plugins
中找到android_alarm_manager-2.0.0
.并找到AlarmBroadcastReceiver.java
,复制粘贴以下代码.该代码来自颤振问题.
Open the project and find the android_alarm_manager-2.0.0
in the External Libraries/Flutter Plugins
. And find AlarmBroadcastReceiver.java
, copy-paste the following code. That code is from the flutter issue.
// Copyright 2019 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
package io.flutter.plugins.androidalarmmanager;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.os.PowerManager;
import android.content.pm.PackageManager;
import android.view.WindowManager;
public class AlarmBroadcastReceiver extends BroadcastReceiver {
private static PowerManager.WakeLock wakeLock;
@Override
public void onReceive(Context context, Intent intent) {
PowerManager powerManager = (PowerManager)
context.getSystemService(Context.POWER_SERVICE);
wakeLock = powerManager.newWakeLock(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON |
PowerManager.ACQUIRE_CAUSES_WAKEUP |
PowerManager.ON_AFTER_RELEASE, "My wakelock");
Intent startIntent = context
.getPackageManager()
.getLaunchIntentForPackage(context.getPackageName());
startIntent.setFlags(
Intent.FLAG_ACTIVITY_REORDER_TO_FRONT |
Intent.FLAG_ACTIVITY_NEW_TASK |
Intent.FLAG_ACTIVITY_RESET_TASK_IF_NEEDED
);
wakeLock.acquire();
context.startActivity(startIntent);
AlarmService.enqueueAlarmProcessing(context, intent);
wakeLock.release();
}
}
2.权限
当闹钟从后台响起时,需要获得权限才能运行应用程序.
2. Permissions
There is a need for permission to run the app when the alarm goes off from the background.
- 显示在其他应用上
- 忽略电池优化
您可以使用 permission_handler 访问权限.
You can access permissions by using permission_handler.
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