Question

我正在使用带有后台服务的录像机应用程序。我收到这些错误：

java.lang.RuntimeException: Unable to start service com.example.justbackgroundcamera.BackgroundVideoRecorder@82e8d33 with Intent { cmp=com.example.justbackgroundcamera/.BackgroundVideoRecorder (has extras) }: android.view.WindowManager$BadTokenException: Unable to add window android.view.ViewRootImpl$W@959f86d -- permission denied for window type 2003

代码：

    windowManager = (WindowManager) this.getSystemService(Context.WINDOW_SERVICE);
    surfaceView = new SurfaceView(this);
    ViewGroup.LayoutParams layoutParams = new WindowManager.LayoutParams(1, 1,
            Build.VERSION.SDK_INT < Build.VERSION_CODES.O ?
                    WindowManager.LayoutParams.TYPE_SYSTEM_ALERT :
                    WindowManager.LayoutParams.TYPE_APPLICATION_OVERLAY,
            WindowManager.LayoutParams.FLAG_WATCH_OUTSIDE_TOUCH,
            PixelFormat.TRANSLUCENT);
    // layoutParams.gravity = Gravity.LEFT | Gravity.TOP;
    windowManager.addView(surfaceView, layoutParams);
    surfaceView.getHolder().addCallback(this);

清单：

<uses-permission android:name="android.permission.RECORD_AUDIO"/>
<uses-permission android:name="android.permission.CAMERA"/>
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
<uses-permission android:name="android.permission.SYSTEM_ALERT_WINDOW" />

我认为关于权限有一些错误。如何获得这些权限？

Answer 1

信息太少。因此，请确保您的应用程序支持Android> = O的限制。因为在这种情况下，您无法在没有通知和Service调用的情况下在后台启动startForeground。

例如

final NotificationManager manager = (NotificationManager) getSystemService(NOTIFICATION_SERVICE);
final String channelId = Build.VERSION.SDK_INT >= Build.VERSION_CODES.O ? getNotificationChannel(manager) : "";
final NotificationCompat.Builder notificationBuilder = new NotificationCompat.Builder(this, channelId);
final Notification notification = notificationBuilder.setOngoing(true)
        .setSmallIcon(R.mipmap.ic_launcher)
        .setCategory(NotificationCompat.CATEGORY_SERVICE)
        .build();

startForeground(110, notification);

Answer 2

我已经解决了问题。使用Android M及更高版本时，我们需要一些权限。您可以使用“在其他应用程序上绘制”权限来解决此问题。

添加到清单

<uses-permission android:name="android.permission.SYSTEM_ALERT_WINDOW" />

WindowManager

    windowManager = (WindowManager) this.getSystemService(Context.WINDOW_SERVICE);
    surfaceView = new SurfaceView(this);
    ViewGroup.LayoutParams layoutParams = new WindowManager.LayoutParams(1, 1,
            Build.VERSION.SDK_INT < Build.VERSION_CODES.O ?
                    WindowManager.LayoutParams.TYPE_SYSTEM_OVERLAY :
                    WindowManager.LayoutParams.TYPE_APPLICATION_OVERLAY,
            WindowManager.LayoutParams.FLAG_WATCH_OUTSIDE_TOUCH,
            PixelFormat.TRANSLUCENT);
    windowManager.addView(surfaceView, layoutParams);
    surfaceView.getHolder().addCallback(this);

添加到代码中（onCreate）

    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
        if (!Settings.canDrawOverlays(this)) {
            Intent intent = new Intent(Settings.ACTION_MANAGE_OVERLAY_PERMISSION, Uri.parse("package:" + getPackageName()));
            startActivityForResult(intent, 0);
        }
    }

无法添加窗口-此窗口类型2003或2006的windowmanager权限被拒绝

2 个答案: