correction for call getParameters using the object created at flashlight on android 5 and support for newer flashlight api CameraManager tested on android 9

plyer/platforms/android/flash.py

@@ -5,51 +5,70 @@
 """
 
 from plyer.facades import Flash
-from jnius import autoclass
-from plyer.platforms.android import activity
+from jnius import autoclass, cast
+from plyer.platforms.android import activity, SDK_INT
+
+if SDK_INT < 23: #use the deprecated api
+    Camera = autoclass("android.hardware.Camera")
+    CameraParameters = autoclass("android.hardware.Camera$Parameters")
+    SurfaceTexture = autoclass("android.graphics.SurfaceTexture")
+else:
+    Context = autoclass('android.content.Context')
 
-Camera = autoclass("android.hardware.Camera")
-CameraParameters = autoclass("android.hardware.Camera$Parameters")
-SurfaceTexture = autoclass("android.graphics.SurfaceTexture")
 PackageManager = autoclass('android.content.pm.PackageManager')
 pm = activity.getPackageManager()
 flash_available = pm.hasSystemFeature(PackageManager.FEATURE_CAMERA_FLASH)
 
-
 class AndroidFlash(Flash):
     _camera = None
 
     def _on(self):
+
         if self._camera is None:
             self._camera_open()
-        if not self._camera:
-            return
-        self._camera.setParameters(self._f_on)
+            if not self._camera:
+                return
+
+        if SDK_INT < 23:
+            self._camera.setParameters(self._f_on)
+        else:
+            self._camera.setTorchMode(self._cameraid, True)
 
     def _off(self):
+
         if not self._camera:
             return
-        self._camera.setParameters(self._f_off)
+
+        if SDK_INT < 23:
+            self._camera.setParameters(self._f_off)
+        else:
+            self._camera.setTorchMode(self._cameraid, False)
 
     def _release(self):
-        if not self._camera:
-            return
-        self._camera.stopPreview()
-        self._camera.release()
-        self._camera = None
+        if SDK_INT < 23:
+            if not self._camera:
+                return
+            self._camera.stopPreview()
+            self._camera.release()
+            self._camera = None
 
-    def _camera_open(self):
+    def _camera_open(self):         
         if not flash_available:
             return
-        self._camera = Camera.open()
-        self._f_on = Camera.getParameters()
-        self._f_off = Camera.getParameters()
-        self._f_on.setFlashMode(CameraParameters.FLASH_MODE_TORCH)
-        self._f_off.setFlashMode(CameraParameters.FLASH_MODE_OFF)
-        self._camera.startPreview()
-        # Need this for Nexus 5
-        self._camera.setPreviewTexture(SurfaceTexture(0))
-
+
+        if SDK_INT < 23:   
+            self._camera = Camera.open()
+            self._f_on = self._camera.getParameters()
+            self._f_off = self._camera.getParameters()
+            self._f_on.setFlashMode(CameraParameters.FLASH_MODE_TORCH)
+            self._f_off.setFlashMode(CameraParameters.FLASH_MODE_OFF)
+            self._camera.startPreview()
+            # Need this for Nexus 5
+            self._camera.setPreviewTexture(SurfaceTexture(0))
+        else:
+            service = activity.getSystemService(Context.CAMERA_SERVICE)
+            self._camera = cast('android.hardware.camera2.CameraManager', service)
+            self._cameraid = self._camera.getCameraIdList()[0]
 
 def instance():
     return AndroidFlash()