屏幕锁定时如何显示来电屏幕？

Question

我正在开发我的自定义呼叫应用程序，例如 Skype，当我收到 fcm 消息时，我需要向用户显示“来电”屏幕。为此，我使用全屏意图通知。我现在的代码是这样的：

        val intent = Intent(Intent.ACTION_MAIN, null)
        val fakeIntent = Intent()
        intent.flags = Intent.FLAG_ACTIVITY_NO_USER_ACTION or Intent.FLAG_ACTIVITY_NEW_TASK
        intent.setClass(ctx, IncomingCallActivity::class.java!!)
        val pendingIntent = PendingIntent.getActivity(ctx, 1, intent, 0)
        val pendingIntent2 = PendingIntent.getActivity(ctx, 1, fakeIntent, PendingIntent.FLAG_ONE_SHOT)
        val builder = Notification.Builder(ctx)
        builder.setOngoing(true)
        builder.setPriority(Notification.PRIORITY_HIGH)

        // Set notification content intent to take user to fullscreen UI if user taps on the
        // notification body.
        builder.setContentIntent(pendingIntent)
        // Set full screen intent to trigger display of the fullscreen UI when the notification
        // manager deems it appropriate.
        builder.setFullScreenIntent(pendingIntent, true)

        // Setup notification content.
        builder.setSmallIcon(R.mipmap.ic_launcher)
        builder.setContentTitle("Call from Vitalii")
        builder.setContentText("Your notification content.")
        builder.setAutoCancel(true)


        // Use builder.addAction(..) to add buttons to answer or reject the call.
        val acceptAction = Notification.Action.Builder(Icon.createWithResource(ctx, R.drawable.ic_launch), "Accept", pendingIntent).build()
        val declineAction = Notification.Action.Builder(Icon.createWithResource(ctx, R.drawable.ic_launch), "Decline", pendingIntent2).build()
        builder.addAction(acceptAction)
        builder.addAction(declineAction)
        val notificationManager = ctx.getSystemService(
                NotificationManager::class.java)
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
            val channel = NotificationChannel("callnotification", "Incoming Calls", NotificationManager.IMPORTANCE_MAX)
            val ringtoneUri = RingtoneManager.getDefaultUri(RingtoneManager.TYPE_RINGTONE);
            channel.setSound(ringtoneUri, AudioAttributes.Builder()
                    .setUsage(AudioAttributes.USAGE_NOTIFICATION_RINGTONE)
                    .setContentType(AudioAttributes.CONTENT_TYPE_SONIFICATION)
                    .build())
            notificationManager.createNotificationChannel(channel)
            builder.setChannelId("callnotification")
        }
        val notification = builder.build()
        notification.flags = Notification.FLAG_INSISTENT
        currentNotificationId = Random().nextInt(500)
        intent.putExtra("notifid", currentNotificationId)
        notificationManager.notify("callnotification", currentNotificationId, notification)

当屏幕解锁时，我会收到带有按钮的呼叫通知，用于接听和拒绝。但是当屏幕被锁定时，我只收到声音和振动，而不是带有电报、whatsup 和 viber 等按钮的自定义屏幕。设备锁定时如何显示这样的自定义屏幕？

Answer 1

在您的 CallActivity 中添加以下代码：

getWindow().addFlags(WindowManager.LayoutParams.FLAG_SHOW_WHEN_LOCKED| WindowManager.LayoutParams.FLAG_TURN_SCREEN_ON|WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);