Failed to start camera session

[jaksab]

I try to start camera after user set permission

@Override public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) { switch (requestCode) { case REQUEST_CAMERA_PERMISSION: if (grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED) { cameraView.start(); } break; } }

but I get exception:

FATAL EXCEPTION: main Process: ua.com.oncreate.infitting, PID: 15583 java.lang.RuntimeException: Failed to start camera session at com.google.android.cameraview.Camera2.startCaptureSession(Camera2.java:443) at com.google.android.cameraview.Camera2$1.onOpened(Camera2.java:65) at android.hardware.camera2.impl.CameraDeviceImpl$1.run(CameraDeviceImpl.java:134) at android.os.Handler.handleCallback(Handler.java:739) at android.os.Handler.dispatchMessage(Handler.java:95) at android.os.Looper.loop(Looper.java:158) at android.app.ActivityThread.main(ActivityThread.java:7225) at java.lang.reflect.Method.invoke(Native Method) at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1230) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1120)

Samsung Note 4 API 6.0.1

[lukaspili]

Same on nexus 6p, android 7.1.1. Right after authorising camera permission: java.lang.RuntimeException: Failed to start camera session

Next calls work properly.

[protocol10]

It appeared on Nexus 5x for android 7.1.1 , after granting permission for Camera java.lang.RuntimeException: Failed to start camera session at com.google.android.cameraview.Camera2.startCaptureSession(Camera2.java:462) at com.google.android.cameraview.Camera2$1.onOpened(Camera2.java:64) at android.hardware.camera2.impl.CameraDeviceImpl$1.run(CameraDeviceImpl.java:134) at android.os.Handler.handleCallback(Handler.java:751) at android.os.Handler.dispatchMessage(Handler.java:95) at android.os.Looper.loop(Looper.java:154) at android.app.ActivityThread.main(ActivityThread.java:6119) at java.lang.reflect.Method.invoke(Native Method) at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:886) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:776)

[xiaoyunfei]

It appeared on LGE Nexus 5x for android O，API25 , after granting permission for Camera

java.lang.RuntimeException: Failed to start camera session at com.google.android.cameraview.Camera2.startCaptureSession(Camera2.java:486) at com.google.android.cameraview.Camera2$1.onOpened(Camera2.java:75) at android.hardware.camera2.impl.CameraDeviceImpl$1.run(CameraDeviceImpl.java:139) at android.os.Handler.handleCallback(Handler.java:769) at android.os.Handler.dispatchMessage(Handler.java:98) at android.os.Looper.loop(Looper.java:164) at android.app.ActivityThread.main(ActivityThread.java:6535) at java.lang.reflect.Method.invoke(Native Method) at com.android.internal.os.Zygote$MethodAndArgsCaller.run(Zygote.java:240) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:767)

[yanxinmiao]

I got this issue too on HuaWei Phone ， but only the fisrt time to use camera 。

Who know how to solve this bug ？

[JeetSingh4]

I solved it by giving a delay of 500 mS while creating capture session because the camera configurations are not fully loaded until then, hence this delay.

void startCaptureSession() {
        if (!isCameraOpened() || !mPreview.isReady() || mImageReader == null) {
            return;
        }
        previewSize = chooseOptimalSize();
        mPreview.setBufferSize(previewSize.getWidth(), previewSize.getHeight());
        new Handler().postDelayed(new Runnable() {
            @Override
            public void run() {
                try {
                    Surface surface = mPreview.getSurface();
                    mPreviewRequestBuilder = mCamera.createCaptureRequest(CameraDevice.TEMPLATE_PREVIEW);
                    mPreviewRequestBuilder.addTarget(surface);
                    mCamera.createCaptureSession(Arrays.asList(surface, mImageReader.getSurface()),
                            mSessionCallback, mBackgroundHandler);
                } catch (CameraAccessException e) {
                    throw new RuntimeException("Failed to start camera session");
                }
            }
        }, 500);
    }

[yanxinmiao]

@JeetSingh4 Thanks Your solution solved my issue .

[zweinz]

Calling cameraView.start() on a delay also solved this issue for me but now I'm running into #11 instead.

[JeetSingh4]

@zweinz buddy I hope this helps https://stackoverflow.com/questions/40146485/session-has-been-closed-further-changes-are-illegal/48019131#48019131

[srikanthnama]

@JeetSingh4 I am still facing issue even after using your solution

[Seckawijoki]

@JeetSingh4 Crash that the mCamera will sometimes become null will happen in some devices like Mi and Huawei, so it need a prerequisite sentence before calling createCaptureRequest inside Runnable.