FATAL EXCEPTION: main E/AndroidRuntime(26360): Process: cn.rc100.rong_b, PID: 26360 E/AndroidRuntime(26360): java.lang.NullPointerException: Attempt to invoke virtual method 'android.view.Surface android.media.ImageReader.getSurface()' on a null object reference

[LNyears]

在相机权限未授权情况下进行操作，多次点击会导致应用闪退：

Android 7.1.2
vivo

E/AndroidRuntime(26360): FATAL EXCEPTION: main
E/AndroidRuntime(26360): Process: cn.rc100.rong_b, PID: 26360
E/AndroidRuntime(26360): java.lang.NullPointerException: Attempt to invoke virtual method 'android.view.Surface android.media.ImageReader.getSurface()' on a null object reference
E/AndroidRuntime(26360): at com.rhyme.r_scan.RScanCamera.RScanCamera.startPreviewWithImageStream(RScanCamera.java:369)
E/AndroidRuntime(26360): at com.rhyme.r_scan.RScanCamera.RScanCamera.startPreview(RScanCamera.java:275)
E/AndroidRuntime(26360): at com.rhyme.r_scan.RScanCamera.RScanCamera.access$100(RScanCamera.java:51)
E/AndroidRuntime(26360): at com.rhyme.r_scan.RScanCamera.RScanCamera$1.onOpened(RScanCamera.java:161)
E/AndroidRuntime(26360): at android.hardware.camera2.impl.CameraDeviceImpl$1.run(CameraDeviceImpl.java:134)
E/AndroidRuntime(26360): at android.os.Handler.handleCallback(Handler.java:751)
E/AndroidRuntime(26360): at android.os.Handler.dispatchMessage(Handler.java:95)
E/AndroidRuntime(26360): at android.os.Looper.loop(Looper.java:154)
E/AndroidRuntime(26360): at android.app.ActivityThread.main(ActivityThread.java:6267)
E/AndroidRuntime(26360): at java.lang.reflect.Method.invoke(Native Method)
E/AndroidRuntime(26360): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:903)
E/AndroidRuntime(26360): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:793)