如何在Android 10中从后台启动活动? [英] How To Start An Activity From Background in Android 10?
问题描述
我正在构建一个Android应用，该应用需要从后台开始活动.我正在使用扩展Service的ForegroundStarter来完成此任务.我有一个活动Adscreen.class，需要从我的前台服务中运行.活动Adscreen.class在除Android 10以外的所有Android版本上都可以正常运行(从后台开始).
ForeGroundStarter.class
public class ForeGroundStarter extends Service {
@Nullable
@Override
public IBinder onBind(Intent intent) {
return null;
}
@Override
public void onCreate() {
super.onCreate();
Log.d("sK", "Inside Foreground");
}
@Override
public int onStartCommand(Intent intent, int flags, int startId) {
Log.d("sK", "Inside Foreground onStartCommand");
Intent notificationIntent = new Intent(this, Adscreen.class);
PendingIntent pendingIntent =
PendingIntent.getActivity(this, 0, notificationIntent, 0);
Notification notification =
null;
//Launching Foreground Services From API 26+
notificationIntent = new Intent(this, Adscreen.class);
pendingIntent =
PendingIntent.getActivity(this, 0, notificationIntent, 0);
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
String NOTIFICATION_CHANNEL_ID = "com.currency.usdtoinr";
String channelName = "My Background Service";
NotificationChannel chan = null;
chan = new NotificationChannel(NOTIFICATION_CHANNEL_ID, channelName, NotificationManager.IMPORTANCE_NONE);
chan.setLightColor(Color.BLUE);
chan.setLockscreenVisibility(Notification.VISIBILITY_PRIVATE);
NotificationManager manager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
assert manager != null;
manager.createNotificationChannel(chan);
NotificationCompat.Builder notificationBuilder = new NotificationCompat.Builder(this, NOTIFICATION_CHANNEL_ID);
notification = notificationBuilder.setOngoing(true)
.setSmallIcon(R.drawable.nicon)
.setContentTitle("")
.setPriority(NotificationManager.IMPORTANCE_MIN)
.setCategory(Notification.CATEGORY_SERVICE)
.build();
startForeground(2, notification);
Intent dialogIntent = new Intent(this, Adscreen.class);
dialogIntent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
startActivity(dialogIntent);
Log.d("sk", "After startforeground executed");
}
else //API 26 and lower
{
notificationIntent = new Intent(this, Adscreen.class);
pendingIntent =
PendingIntent.getActivity(this, 0, notificationIntent, 0);
notification =
new Notification.Builder(this)
.setContentTitle("")
.setContentText("")
.setSmallIcon(R.drawable.nicon)
.setContentIntent(pendingIntent)
.setTicker("")
.build();
startForeground(2, notification);
Intent dialogIntent = new Intent(this, Adscreen.class);
dialogIntent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
startActivity(dialogIntent);
}
return super.onStartCommand(intent, flags, startId);
}
}
我阅读到从Android 10的后台启动活动有一些限制.此代码似乎不再起作用. https://developer.android.com/guide/components/activities/background-starts
Intent dialogIntent = new Intent(this, Adscreen.class);
dialogIntent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
startActivity(dialogIntent);
有什么变通办法可以在Android 10上从后台启动活动吗?
不确定这样做是否正确，但是我没有足够的时间(该应用仅供公司内部使用).
我使用了权限:
<uses-permission android:name="android.permission.FOREGROUND_SERVICE"/>
<uses-permission android:name="android.permission.SYSTEM_ALERT_WINDOW"/>
然后每个用户都必须转到应用程序的设置->权限，然后在高级设置中选中功能将应用程序展示给其他用户"
很抱歉我的英语不是完全正确的解决方案，但是它确实有效，所以对我来说是很好的修复程序.
在Pixel 4上，它将如下所示:
I am building an android app where I need to start an activity from background. I am using a ForegroundStarter which extends Service for accomplishing this. I have an activity Adscreen.class which I need to run from my Foreground service. The activity Adscreen.class works fine(starts from background) on all Android versions except Android 10.
ForeGroundStarter.class
public class ForeGroundStarter extends Service {
@Nullable
@Override
public IBinder onBind(Intent intent) {
return null;
}
@Override
public void onCreate() {
super.onCreate();
Log.d("sK", "Inside Foreground");
}
@Override
public int onStartCommand(Intent intent, int flags, int startId) {
Log.d("sK", "Inside Foreground onStartCommand");
Intent notificationIntent = new Intent(this, Adscreen.class);
PendingIntent pendingIntent =
PendingIntent.getActivity(this, 0, notificationIntent, 0);
Notification notification =
null;
//Launching Foreground Services From API 26+
notificationIntent = new Intent(this, Adscreen.class);
pendingIntent =
PendingIntent.getActivity(this, 0, notificationIntent, 0);
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
String NOTIFICATION_CHANNEL_ID = "com.currency.usdtoinr";
String channelName = "My Background Service";
NotificationChannel chan = null;
chan = new NotificationChannel(NOTIFICATION_CHANNEL_ID, channelName, NotificationManager.IMPORTANCE_NONE);
chan.setLightColor(Color.BLUE);
chan.setLockscreenVisibility(Notification.VISIBILITY_PRIVATE);
NotificationManager manager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
assert manager != null;
manager.createNotificationChannel(chan);
NotificationCompat.Builder notificationBuilder = new NotificationCompat.Builder(this, NOTIFICATION_CHANNEL_ID);
notification = notificationBuilder.setOngoing(true)
.setSmallIcon(R.drawable.nicon)
.setContentTitle("")
.setPriority(NotificationManager.IMPORTANCE_MIN)
.setCategory(Notification.CATEGORY_SERVICE)
.build();
startForeground(2, notification);
Intent dialogIntent = new Intent(this, Adscreen.class);
dialogIntent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
startActivity(dialogIntent);
Log.d("sk", "After startforeground executed");
}
else //API 26 and lower
{
notificationIntent = new Intent(this, Adscreen.class);
pendingIntent =
PendingIntent.getActivity(this, 0, notificationIntent, 0);
notification =
new Notification.Builder(this)
.setContentTitle("")
.setContentText("")
.setSmallIcon(R.drawable.nicon)
.setContentIntent(pendingIntent)
.setTicker("")
.build();
startForeground(2, notification);
Intent dialogIntent = new Intent(this, Adscreen.class);
dialogIntent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
startActivity(dialogIntent);
}
return super.onStartCommand(intent, flags, startId);
}
}
I read that there are some restrictions on starting activities from background on Android 10. This code doesnt seem to be working anymore. https://developer.android.com/guide/components/activities/background-starts
Intent dialogIntent = new Intent(this, Adscreen.class);
dialogIntent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
startActivity(dialogIntent);
Any workarounds to start an activity from background on Android 10?
Not sure if it's right to do it this way, but I did not have enough time (app is only for company internal use).
I used permissions:
<uses-permission android:name="android.permission.FOREGROUND_SERVICE"/>
<uses-permission android:name="android.permission.SYSTEM_ALERT_WINDOW"/>
and then every user has to go to setting -> permissions of the app and then check box in advanced settings for function "show the app over others"
Sorry for my English or not exactly the right solution, but it worked, so good hotfix for me.
On Pixel 4 it will be looking like this:
这篇关于如何在Android 10中从后台启动活动?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
