Black Screen, no Camera Preview

[dhruv2601]

Description of the problem:

When I am using the below code to access the barcode scanner camera then as in the below image, a black screen covers what should have been the camera instead.
I have made sure that the camera permission is granted.

` <com.journeyapps.barcodescanner.DecoratedBarcodeView
android:id="@+id/scanner"
android:layout_width="match_parent"
android:layout_height="200dp"
app:zxing_preview_scaling_strategy="centerCrop"
app:zxing_use_texture_view="false" />

<com.journeyapps.barcodescanner.ViewfinderView
    android:id="@+id/zxing_viewfinder_view"
    android:layout_width="match_parent"
    android:layout_height="200dp" />

`

My need is to reduce the size of the scanning camera to a given size ex -> as in the figure, so if there is a way around that, then please mention that.

Which library version are you using? 3.5.0.

Logs:

05-23 00:37:34.082 3062-3103/com.raywenderlich.alltherages E/CameraInstance: Failed to open camera
java.lang.RuntimeException: Fail to connect to camera service
at android.hardware.Camera.(Camera.java:568)
at android.hardware.Camera.open(Camera.java:405)
at com.google.zxing.client.android.camera.open.OpenCameraInterface.open(OpenCameraInterface.java:83)
at com.journeyapps.barcodescanner.camera.CameraManager.open(CameraManager.java:138)
at com.journeyapps.barcodescanner.camera.CameraInstance$3.run(CameraInstance.java:190)
at android.os.Handler.handleCallback(Handler.java:739)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:148)
at android.os.HandlerThread.run(HandlerThread.java:61)

[passiondroid]

How did you solved this issue ?

[micsha123]

That seems to be Camera API 2 - it's not supported yet by this library.

[tejas2]

Hey @dhruv2601, How did you fix this issue?

[ikurek]

I'm having the same issue on Android 9

[revrkk]

I faced the same issue. But in my case, I got the following from the logs

W/TextureView: A TextureView or a subclass can only be used with hardware acceleration enabled.

So I just set the hardware acceleration for the activity in the manifest file. and It worked.!

android:hardwareAccelerated="true"

[johndev8964]

@OverRide
protected void onResume() {
super.onResume();
barcodeView.resume();
}

@OverRide
protected void onPause() {
super.onPause();
barcodeView.pause();
}

Please add this, you can open a camera view.

[TheSnowfield]

@OverRide
protected void onResume() {
super.onResume();
barcodeView.resume();
}

@OverRide
protected void onPause() {
super.onPause();
barcodeView.pause();
}

Please add this, you can open a camera view.

It works like a charm. Best thanks!

[alexvarboffin]

!!! android:hardwareAccelerated="true" !!!