Black CameraView after onResume (after onPause) only in Android 7. The camera is taking photo but the view is always black when returning to activity. (ONLY for Android Nougat 7)

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• [x] upgrade gradle to 4.1
• [x] upgrade to android 26
• [x] implement white balance
• [x] implement zoom
• [x] implement focusDepth
• [x] implement record

this is based on @expo work https://github.com/expo/expo/tree/master/android/cameraview

the idea is to consume this package on https://github.com/lwansbrough/react-native-camera (check this https://github.com/lwansbrough/react-native-camera/issues/1031)

When calling cameraView.start(); I get the following exception:

java.lang.IllegalStateException: Session has been closed; further changes are illegal. at android.hardware.camera2.impl.CameraCaptureSessionImpl.checkNotClosed(CameraCaptureSessionImpl.java:606) at android.hardware.camera2.impl.CameraCaptureSessionImpl.setRepeatingRequest(CameraCaptureSessionImpl.java:227) at com.google.android.cameraview.Camera2$3.onConfigured(Camera2.java:132) at java.lang.reflect.Method.invoke(Native Method) at android.hardware.camera2.dispatch.InvokeDispatcher.dispatch(InvokeDispatcher.java:39) at android.hardware.camera2.dispatch.HandlerDispatcher$1.run(HandlerDispatcher.java:65) at android.os.Handler.handleCallback(Handler.java:751) at android.os.Handler.dispatchMessage(Handler.java:95) at android.os.Looper.loop(Looper.java:154) at android.app.ActivityThread.main(ActivityThread.java:6077) at java.lang.reflect.Method.invoke(Native Method) at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:865) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:755)

Note: I'm not calling it in onResume. Rather after the Camera permisison has been granted.

App crashes because session is null but user tries to take pic ==> NPE

java.lang.NullPointerException: Attempt to invoke virtual method 'int android.hardware.camera2.CameraCaptureSession.capture(android.hardware.camera2.CaptureRequest, android.hardware.camera2.CameraCaptureSession$CaptureCallback, android.os.Handler)' on a null object reference at com.google.android.cameraview.Camera2.lockFocus(Camera2.java:587) at com.google.android.cameraview.Camera2.takePicture(Camera2.java:338) at com.google.android.cameraview.CameraView.takePicture(CameraView.java:407)

I have Nexus 6P with Nougat OS in it. I have run the demo in this device. But it is not displaying a preview. I have checked the same demo in other OS and devices but it is working there.

So, I guess the issue is with either Nougat OS support or with the device. But device camera within other app is also working fine. So, finally, the issue is with support for Nougat OS in Nexus 6P. Can you please check that and let me know when the issue gets resolved.

Sincerely, Shreyash

I have raised this issue here in this thread: #85 But as it is suggested to start new thread, I have created this one.

@ataulm @rajeshct I want you to participate in this and help me to resolved this issue.

The issue is that, I am not able to see the preview in Nexus 6P with Nougat OS (Here I want to see the preview in full screen only).

Earlier I have made my camera layout as follow to make it full screen:

<include
        layout="@layout/include_camera"
        android:layout_width="match_parent"
        android:layout_height="match_parent"/>

With this, it was working fine in all the device except Nexus 6p with Nougat OS. After that, I have updated the library and check for the issue. Here the Issue is get resolved but I need to make camera layout as per below code and also need to add AspectRatio to the Camera preview to display in that ratio.

<include
        layout="@layout/include_camera"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"/>

Now, If I make it to match_parent in height then It will stop showing preview in any device (Not only 6P with Nougat OS). And If I make it wrap_content then, it will show preview, but not in full screen but with the aspect ration of the screen.

So, here I want to have the full-screen preview of the Camera which was working nicely in old devices (Lower then 6p and Nougat OS).

I hope you understand the issue I am facing with the update of the library.

Please help me to resolved this issue.

java.lang.RuntimeException: takePicture failed
at android.hardware.Camera.native_takePicture(Native Method)
at android.hardware.Camera.takePicture(Camera.java:1561)
at com.google.android.cameraview.Camera1.takePictureInternal(Camera1.java:230)
at com.google.android.cameraview.Camera1$2.onAutoFocus(Camera1.java:221)
at android.hardware.Camera$EventHandler.handleMessage(Camera.java:1199)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:135)
at android.app.ActivityThread.main(ActivityThread.java:5593)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:967)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:762)

Device: Honor SCL-AL00 OS: EMUI3.1.1(Android 5.1.1) other problem:call back onPictureTaken and save picture always.

Camera1.java

   @Override
    void takePicture() {
        if (!isCameraOpened()) {
            throw new IllegalStateException(
                    "Camera is not ready. Call start() before takePicture().");
        }
        if (getAutoFocus()) {
            mCamera.cancelAutoFocus();
            mCamera.autoFocus(new Camera.AutoFocusCallback() {
                @Override
                public void onAutoFocus(boolean success, Camera camera) {
                    takePictureInternal();
                }
            });
        } else {
            takePictureInternal();
        }
    }

takePictureInternal(); mCamera.cancelAutoFocus(); it is work.

• Camera1 API: Split display orientation calculation from camera rotation calculation
• Adjusted camera rotation to flip when landscape
• Always apply parameters when opening a camera

Tested on Samsung S5 (SM_G900A), Moto G (XT1032), Samsung Galaxy Core LTE (SM-G386M)

When I use a fixed size for the CameraView like in the first picture, i realised the size of the saved photo differs from the displayed in the app

I came up with a fix to crop the image to only save the portion of the picture the user is really watching in the app. The comparison of the previous saved image and the cropped is show below.

I have following exception reported twice from Crashlytics in my app. Attaching device statistics.

Fatal Exception: java.lang.NullPointerException: Attempt to invoke virtual method 'android.view.Surface android.media.ImageReader.getSurface()' on a null object reference at com.google.android.cameraview.Camera2.startCaptureSession(SourceFile:470) at com.google.android.cameraview.Camera2.access$200(SourceFile:50) at com.google.android.cameraview.Camera2$1.onSurfaceTextureAvailable(SourceFile:70) at android.view.TextureView.getHardwareLayer(TextureView.java:370) at android.view.View.updateDisplayListIfDirty(View.java:14076) at android.view.View.getDisplayList(View.java:14122) at android.view.View.draw(View.java:14898) at android.view.ViewGroup.drawChild(ViewGroup.java:3407) at android.view.ViewGroup.dispatchDraw(ViewGroup.java:3201) at android.view.View.updateDisplayListIfDirty(View.java:14094) at android.view.View.getDisplayList(View.java:14122) at android.view.View.draw(View.java:14898) at android.view.ViewGroup.drawChild(ViewGroup.java:3407) at android.view.ViewGroup.dispatchDraw(ViewGroup.java:3201) at android.view.View.draw(View.java:15177) at android.view.View.updateDisplayListIfDirty(View.java:14099) at android.view.View.getDisplayList(View.java:14122) at android.view.View.draw(View.java:14898) at android.view.ViewGroup.drawChild(ViewGroup.java:3407) at android.view.ViewGroup.dispatchDraw(ViewGroup.java:3201) at android.view.View.updateDisplayListIfDirty(View.java:14094) at android.view.View.getDisplayList(View.java:14122) at android.view.View.draw(View.java:14898) at android.view.ViewGroup.drawChild(ViewGroup.java:3407) at android.view.ViewGroup.dispatchDraw(ViewGroup.java:3201) at android.view.View.updateDisplayListIfDirty(View.java:14094) at android.view.View.getDisplayList(View.java:14122) at android.view.View.draw(View.java:14898) at android.view.ViewGroup.drawChild(ViewGroup.java:3407) at android.view.ViewGroup.dispatchDraw(ViewGroup.java:3201) at android.view.View.updateDisplayListIfDirty(View.java:14094) at android.view.View.getDisplayList(View.java:14122) at android.view.View.draw(View.java:14898) at android.view.ViewGroup.drawChild(ViewGroup.java:3407) at android.view.ViewGroup.dispatchDraw(ViewGroup.java:3201) at android.view.View.updateDisplayListIfDirty(View.java:14094) at android.view.View.getDisplayList(View.java:14122) at android.view.View.draw(View.java:14898) at android.view.ViewGroup.drawChild(ViewGroup.java:3407) at android.view.ViewGroup.dispatchDraw(ViewGroup.java:3201) at android.view.View.updateDisplayListIfDirty(View.java:14094) at android.view.View.getDisplayList(View.java:14122) at android.view.View.draw(View.java:14898) at android.view.ViewGroup.drawChild(ViewGroup.java:3407) at android.view.ViewGroup.dispatchDraw(ViewGroup.java:3201) at android.view.View.draw(View.java:15177) at android.widget.FrameLayout.draw(FrameLayout.java:592) at com.android.internal.policy.impl.PhoneWindow$DecorView.draw(PhoneWindow.java:2695) at android.view.View.updateDisplayListIfDirty(View.java:14099) at android.view.View.getDisplayList(View.java:14122) at android.view.ThreadedRenderer.updateViewTreeDisplayList(ThreadedRenderer.java:266) at android.view.ThreadedRenderer.updateRootDisplayList(ThreadedRenderer.java:272) at android.view.ThreadedRenderer.draw(ThreadedRenderer.java:311) at android.view.ViewRootImpl.draw(ViewRootImpl.java:2531) at android.view.ViewRootImpl.performDraw(ViewRootImpl.java:2367) at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1998) at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1078) at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:5885) at android.view.Choreographer$CallbackRecord.run(Choreographer.java:767) at android.view.Choreographer.doCallbacks(Choreographer.java:580) at android.view.Choreographer.doFrame(Choreographer.java:550) at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:753) at android.os.Handler.handleCallback(Handler.java:739) at android.os.Handler.dispatchMessage(Handler.java:95) at android.os.Looper.loop(Looper.java:135) at android.app.ActivityThread.main(ActivityThread.java:5376) at java.lang.reflect.Method.invoke(Method.java) at java.lang.reflect.Method.invoke(Method.java:372) at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:908) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:703)

here is the log: E/AndroidRuntime: FATAL EXCEPTION: main Process: com.google.android.cameraview.demo, PID: 5552 java.lang.RuntimeException: Camera is being used after Camera.release() was called at android.hardware.Camera.native_getParameters(Native Method) at android.hardware.Camera.getParameters(Camera.java:3337) at android.hardware.Camera.cameraInitVersion(Camera.java:770) at android.hardware.Camera.cameraInitNormal(Camera.java:784) at android.hardware.Camera.(Camera.java:807) at android.hardware.Camera.open(Camera.java:506) at com.google.android.cameraview.Camera1.openCamera(Camera1.java:276) at com.google.android.cameraview.Camera1.start(Camera1.java:89) at com.google.android.cameraview.Camera1.setFacing(Camera1.java:134) at com.google.android.cameraview.CameraView.setFacing(CameraView.java:317) at com.google.android.cameraview.demo.MainActivity.onOptionsItemSelected(MainActivity.java:212) at android.app.Activity.onMenuItemSelected(Activity.java:2940) at android.support.v4.app.FragmentActivity.onMenuItemSelected(FragmentActivity.java:361) at android.support.v7.app.AppCompatActivity.onMenuItemSelected(AppCompatActivity.java:195) at android.support.v7.view.WindowCallbackWrapper.onMenuItemSelected(WindowCallbackWrapper.java:108) at android.support.v7.view.WindowCallbackWrapper.onMenuItemSelected(WindowCallbackWrapper.java:108) at android.support.v7.app.ToolbarActionBar$2.onMenuItemClick(ToolbarActionBar.java:65) at android.support.v7.widget.Toolbar$1.onMenuItemClick(Toolbar.java:202) at android.support.v7.widget.ActionMenuView$MenuBuilderCallback.onMenuItemSelected(ActionMenuView.java:780) at android.support.v7.view.menu.MenuBuilder.dispatchMenuItemSelected(MenuBuilder.java:822) at android.support.v7.view.menu.MenuItemImpl.invoke(MenuItemImpl.java:171) at android.support.v7.view.menu.MenuBuilder.performItemAction(MenuBuilder.java:973) at android.support.v7.view.menu.MenuBuilder.performItemAction(MenuBuilder.java:963) at android.support.v7.widget.ActionMenuView.invokeItem(ActionMenuView.java:624) at android.support.v7.view.menu.ActionMenuItemView.onClick(ActionMenuItemView.java:150) at android.view.View.performClick(View.java:4848) at android.view.View$PerformClick.run(View.java:20255) at android.os.Handler.handleCallback(Handler.java:815) at android.os.Handler.dispatchMessage(Handler.java:104) at android.os.Looper.loop(Looper.java:194) at android.app.ActivityThread.main(ActivityThread.java:5643) at java.lang.reflect.Method.invoke(Native Method) at java.lang.reflect.Method.invoke(Method.java:372) at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:960) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:755)

java.lang.IllegalArgumentException: Surface was abandoned at android.hardware.camera2.utils.SurfaceUtils.getSurfaceSize(SurfaceUtils.java:89) at android.hardware.camera2.params.OutputConfiguration.(OutputConfiguration.java:260) at android.hardware.camera2.params.OutputConfiguration.(OutputConfiguration.java:145) at android.hardware.camera2.impl.CameraDeviceImpl.createCaptureSession(CameraDeviceImpl.java:546) at com.google.android.cameraview.Camera2.startCaptureSession(Unknown Source:80) at com.google.android.cameraview.Camera2$5.onSurfaceChanged(Unknown Source:2) at com.google.android.cameraview.PreviewImpl.dispatchSurfaceChanged(Unknown Source:2) at com.google.android.cameraview.TextureViewPreview$1.onSurfaceTextureAvailable(Unknown Source:12) at android.view.TextureView.getTextureLayer(TextureView.java:410) at android.view.TextureView.draw(TextureView.java:353) at android.view.View.updateDisplayListIfDirty(View.java:19370) at android.view.View.draw(View.java:20231) at android.view.ViewGroup.drawChild(ViewGroup.java:4454) at android.view.ViewGroup.dispatchDraw(ViewGroup.java:4210) at android.view.View.updateDisplayListIfDirty(View.java:19361) at android.view.View.draw(View.java:20231) at android.view.ViewGroup.drawChild(ViewGroup.java:4454) at android.view.ViewGroup.dispatchDraw(ViewGroup.java:4210) at android.view.View.updateDisplayListIfDirty(View.java:19361) at android.view.View.draw(View.java:20231) at android.view.ViewGroup.drawChild(ViewGroup.java:4454) at android.view.ViewGroup.dispatchDraw(ViewGroup.java:4210) at android.view.View.draw(View.java:20506) at android.view.View.updateDisplayListIfDirty(View.java:19370) at android.view.View.draw(View.java:20231) at android.view.ViewGroup.drawChild(ViewGroup.java:4454) at android.view.ViewGroup.dispatchDraw(ViewGroup.java:4210) at android.view.View.updateDisplayListIfDirty(View.java:19361) at android.view.View.draw(View.java:20231) at android.view.ViewGroup.drawChild(ViewGroup.java:4454) at android.view.ViewGroup.dispatchDraw(ViewGroup.java:4210) at android.view.View.updateDisplayListIfDirty(View.java:19361) at android.view.View.draw(View.java:20231) at android.view.ViewGroup.drawChild(ViewGroup.java:4454) at android.view.ViewGroup.dispatchDraw(ViewGroup.java:4210) at android.view.View.updateDisplayListIfDirty(View.java:19361) at android.view.View.draw(View.java:20231) at android.view.ViewGroup.drawChild(ViewGroup.java:4454) at android.view.ViewGroup.dispatchDraw(ViewGroup.java:4210) at android.view.View.updateDisplayListIfDirty(View.java:19361) at android.view.View.draw(View.java:20231) at android.view.ViewGroup.drawChild(ViewGroup.java:4454) at android.view.ViewGroup.dispatchDraw(ViewGroup.java:4210) at android.view.View.draw(View.java:20506) at com.android.internal.policy.DecorView.draw(DecorView.java:913) at android.view.View.updateDisplayListIfDirty(View.java:19370) at android.view.ThreadedRenderer.updateViewTreeDisplayList(ThreadedRenderer.java:690) at android.view.ThreadedRenderer.updateRootDisplayList(ThreadedRenderer.java:696) at android.view.ThreadedRenderer.draw(ThreadedRenderer.java:805) at android.view.ViewRootImpl.draw(ViewRootImpl.java:3990) at android.view.ViewRootImpl.performDraw(ViewRootImpl.java:3741) at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:3036) at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1874) at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:8141) at android.view.Choreographer$CallbackRecord.run(Choreographer.java:1146) at android.view.Choreographer.doCallbacks(Choreographer.java:957) at android.view.Choreographer.doFrame(Choreographer.java:884) at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:1132) at android.os.Handler.handleCallback(Handler.java:873) at android.os.Handler.dispatchMessage(Handler.java:99) at android.os.Looper.loop(Looper.java:227) at android.app.ActivityThread.main(ActivityThread.java:7279) at java.lang.reflect.Method.invoke(Native Method) at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:575) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:908) Caused by: android.hardware.camera2.legacy.LegacyExceptionUtils$BufferQueueAbandonedException at android.hardware.camera2.legacy.LegacyExceptionUtils.throwOnError(LegacyExceptionUtils.java:73) at android.hardware.camera2.legacy.LegacyCameraDevice.getSurfaceSize(LegacyCameraDevice.java:606) at android.hardware.camera2.utils.SurfaceUtils.getSurfaceSize(SurfaceUtils.java:87) ... 64 more android.hardware.camera2.legacy.LegacyExceptionUtils$BufferQueueAbandonedException at android.hardware.camera2.legacy.LegacyExceptionUtils.throwOnError(LegacyExceptionUtils.java:73) at android.hardware.camera2.legacy.LegacyCameraDevice.getSurfaceSize(LegacyCameraDevice.java:606) at android.hardware.camera2.utils.SurfaceUtils.getSurfaceSize(SurfaceUtils.java:87) at android.hardware.camera2.params.OutputConfiguration.(OutputConfiguration.java:260) at android.hardware.camera2.params.OutputConfiguration.(OutputConfiguration.java:145) at android.hardware.camera2.impl.CameraDeviceImpl.createCaptureSession(CameraDeviceImpl.java:546) at com.google.android.cameraview.Camera2.startCaptureSession(Unknown Source:80) at com.google.android.cameraview.Camera2$5.onSurfaceChanged(Unknown Source:2) at com.google.android.cameraview.PreviewImpl.dispatchSurfaceChanged(Unknown Source:2) at com.google.android.cameraview.TextureViewPreview$1.onSurfaceTextureAvailable(Unknown Source:12) at android.view.TextureView.getTextureLayer(TextureView.java:410) at android.view.TextureView.draw(TextureView.java:353) at android.view.View.updateDisplayListIfDirty(View.java:19370) at android.view.View.draw(View.java:20231) at android.view.ViewGroup.drawChild(ViewGroup.java:4454) at android.view.ViewGroup.dispatchDraw(ViewGroup.java:4210) at android.view.View.updateDisplayListIfDirty(View.java:19361) at android.view.View.draw(View.java:20231) at android.view.ViewGroup.drawChild(ViewGroup.java:4454) at android.view.ViewGroup.dispatchDraw(ViewGroup.java:4210) at android.view.View.updateDisplayListIfDirty(View.java:19361) at android.view.View.draw(View.java:20231) at android.view.ViewGroup.drawChild(ViewGroup.java:4454) at android.view.ViewGroup.dispatchDraw(ViewGroup.java:4210) at android.view.View.draw(View.java:20506) at android.view.View.updateDisplayListIfDirty(View.java:19370) at android.view.View.draw(View.java:20231) at android.view.ViewGroup.drawChild(ViewGroup.java:4454) at android.view.ViewGroup.dispatchDraw(ViewGroup.java:4210) at android.view.View.updateDisplayListIfDirty(View.java:19361) at android.view.View.draw(View.java:20231) at android.view.ViewGroup.drawChild(ViewGroup.java:4454) at android.view.ViewGroup.dispatchDraw(ViewGroup.java:4210) at android.view.View.updateDisplayListIfDirty(View.java:19361) at android.view.View.draw(View.java:20231) at android.view.ViewGroup.drawChild(ViewGroup.java:4454) at android.view.ViewGroup.dispatchDraw(ViewGroup.java:4210) at android.view.View.updateDisplayListIfDirty(View.java:19361) at android.view.View.draw(View.java:20231) at android.view.ViewGroup.drawChild(ViewGroup.java:4454) at android.view.ViewGroup.dispatchDraw(ViewGroup.java:4210) at android.view.View.updateDisplayListIfDirty(View.java:19361) at android.view.View.draw(View.java:20231) at android.view.ViewGroup.drawChild(ViewGroup.java:4454) at android.view.ViewGroup.dispatchDraw(ViewGroup.java:4210) at android.view.View.draw(View.java:20506) at com.android.internal.policy.DecorView.draw(DecorView.java:913) at android.view.View.updateDisplayListIfDirty(View.java:19370) at android.view.ThreadedRenderer.updateViewTreeDisplayList(ThreadedRenderer.java:690) at android.view.ThreadedRenderer.updateRootDisplayList(ThreadedRenderer.java:696) at android.view.ThreadedRenderer.draw(ThreadedRenderer.java:805) at android.view.ViewRootImpl.draw(ViewRootImpl.java:3990) at android.view.ViewRootImpl.performDraw(ViewRootImpl.java:3741) at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:3036) at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1874) at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:8141) at android.view.Choreographer$CallbackRecord.run(Choreographer.java:1146) at android.view.Choreographer.doCallbacks(Choreographer.java:957) at android.view.Choreographer.doFrame(Choreographer.java:884) at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:1132) at android.os.Handler.handleCallback(Handler.java:873) at android.os.Handler.dispatchMessage(Handler.java:99) at android.os.Looper.loop(Looper.java:227) at android.app.ActivityThread.main(ActivityThread.java:7279) at java.lang.reflect.Method.invoke(Native Method) at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:575) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:908)

I am developing an application in which I capture and upload images.

What I have observed is the Camera intent is always turning the photos captured in portrait to landscape on Google Pixel running Google Camera app.

I have been through almost 20-30 searches which says the same thing, i.e. use ExifInterface or the Cursor. Using ExifInterface class is always returning 0 orientation and Cursor cannot find any value for column.

This is so annoying. This is such a basic feature, people should not have trouble with it.

In order to reproduce the issue you need to install Google camera app on the emulator and when using Camera intent select the Google camera from the bottom sheet.

I am stuck with this for a month now. Tired of working on other parts while prototyping.

i got error on device Redmi Note 8

this is an error

Fatal Exception: java.lang.RuntimeException Failed to start camera session com.google.android.cameraview.Camera2.startCaptureSession (Camera2.java:654) com.google.android.cameraview.Camera2$5.onSurfaceChanged (Camera2.java:235) com.google.android.cameraview.PreviewImpl.dispatchSurfaceChanged (PreviewImpl.java:54) com.google.android.cameraview.TextureViewPreview$1.onSurfaceTextureSizeChanged (TextureViewPreview.java:51) android.view.TextureView.onSizeChanged (TextureView.java:367) android.view.View.sizeChange (View.java:20875) android.view.View.setFrame (View.java:20836) android.view.View.layout (View.java:20696) android.widget.FrameLayout.layoutChildren (FrameLayout.java:323) android.widget.FrameLayout.onLayout (FrameLayout.java:261) android.view.View.layout (View.java:20699) android.view.ViewGroup.layout (ViewGroup.java:6198) android.widget.RelativeLayout.onLayout (RelativeLayout.java:1083) android.view.View.layout (View.java:20699) android.view.ViewGroup.layout (ViewGroup.java:6198) android.widget.FrameLayout.layoutChildren (FrameLayout.java:323) android.widget.FrameLayout.onLayout (FrameLayout.java:261) android.view.View.layout (View.java:20699) android.view.ViewGroup.layout (ViewGroup.java:6198) android.widget.LinearLayout.setChildFrame (LinearLayout.java:1812) android.widget.LinearLayout.layoutVertical (LinearLayout.java:1656) android.widget.LinearLayout.onLayout (LinearLayout.java:1565) android.view.View.layout (View.java:20699) android.view.ViewGroup.layout (ViewGroup.java:6198) android.widget.FrameLayout.layoutChildren (FrameLayout.java:323) android.widget.FrameLayout.onLayout (FrameLayout.java:261) android.view.View.layout (View.java:20699) android.view.ViewGroup.layout (ViewGroup.java:6198) android.widget.LinearLayout.setChildFrame (LinearLayout.java:1812) android.widget.LinearLayout.layoutVertical (LinearLayout.java:1656) android.widget.LinearLayout.onLayout (LinearLayout.java:1565) android.view.View.layout (View.java:20699) android.view.ViewGroup.layout (ViewGroup.java:6198) android.widget.FrameLayout.layoutChildren (FrameLayout.java:323) android.widget.FrameLayout.onLayout (FrameLayout.java:261) com.android.internal.policy.DecorView.onLayout (DecorView.java:757) android.view.View.layout (View.java:20699) android.view.ViewGroup.layout (ViewGroup.java:6198) android.view.ViewRootImpl.performLayout (ViewRootImpl.java:2844) android.view.ViewRootImpl.performTraversals (ViewRootImpl.java:2361) android.view.ViewRootImpl.doTraversal (ViewRootImpl.java:1506) android.view.ViewRootImpl$TraversalRunnable.run (ViewRootImpl.java:7351) android.view.Choreographer$CallbackRecord.run (Choreographer.java:1044) android.view.Choreographer.doCallbacks (Choreographer.java:839) android.view.Choreographer.doFrame (Choreographer.java:774) android.view.Choreographer$FrameDisplayEventReceiver.run (Choreographer.java:1030) android.os.Handler.handleCallback (Handler.java:873) android.os.Handler.dispatchMessage (Handler.java:99) android.os.Looper.loop (Looper.java:201) android.app.ActivityThread.main (ActivityThread.java:6864) java.lang.reflect.Method.invoke (Method.java) com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run (RuntimeInit.java:547) com.android.internal.os.ZygoteInit.main (ZygoteInit.java:873)

anyone help me ?

On Huawei mobile phones, the flash is on, sometimes the flash only flashes once when taking pictures, sometimes flashes twice.

previewRequestBuilder.set(CaptureRequest.CONTROL_AE_MODE, CaptureRequest.CONTROL_AE_MODE_ON_ALWAYS_FLASH);

previewRequestBuilder.set(CaptureRequest.FLASH_MODE, CaptureRequest.FLASH_MODE_OFF);