如何使用Android CameraX API缩放相机? [英] How to zoom camera using Android CameraX API?
本文介绍了如何使用Android CameraX API缩放相机?的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我尝试使用CameraX使用以下代码缩放相机.
I have tried to zoom camera with below code using CameraX.
首先，我从CameraX获得一个Preview，并尝试使用Preview进行缩放，如下所示.
First I get a Preview from CameraX and tried to perform zoom using Preview like below.
var config = CameraX.getDefaultUseCaseConfig(PreviewConfig::class.java, lensFacing)
var preview = Preview(config)
preview.zoom(zoom)
在preview.zoom()之后，我再次与CameraX绑定，并得到一些错误，它不起作用.
After preview.zoom() I just bind again with CameraX and get some error and it's not working.
CameraX.bindToLifecycle(this, preview, imageCapture, videoCapture)
当上面的代码不起作用时，我先尝试使用CameraX.unbindAll()，然后再调用CameraX.bindToLifecycle().但是再次遇到一些错误，无法成功进行缩放.
When the above code was not working, I tried with CameraX.unbindAll() first and then I call CameraX.bindToLifecycle(). But face some error again and not get success in zoom.
让我知道如何使用CameraX API缩放相机.
Let me know how we can zoom the camera using CameraX API.
更新下面的错误日志:
仅使用CameraX.bindToLifecycle()的错误日志:
Error log using only CameraX.bindToLifecycle():
java.lang.IllegalArgumentException: Exceeded max simultaneously bound image capture use cases.
at androidx.camera.camera2.impl.UseCaseSurfaceOccupancyManager.checkUseCaseLimitNotExceeded(UseCaseSurfaceOccupancyManager.java:61)
at androidx.camera.camera2.impl.Camera2DeviceSurfaceManager.getSuggestedResolutions(Camera2DeviceSurfaceManager.java:146)
at androidx.camera.core.CameraX.calculateSuggestedResolutions(CameraX.java:449)
at androidx.camera.core.CameraX.bindToLifecycle(CameraX.java:144)
at com.android.example.cameraxbasic.fragments.CameraFragment$updateCameraUi$2.onTouch(CameraFragment.kt:408)
at android.view.View.dispatchTouchEvent(View.java:12512)
at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:3032)
at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2719)
at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:3032)
at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2719)
at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:3032)
at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2719)
at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:3032)
at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2719)
at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:3032)
at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2719)
at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:3032)
at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2719)
at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:3032)
at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2719)
at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:3032)
at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2719)
at com.android.internal.policy.DecorView.superDispatchTouchEvent(DecorView.java:475)
at com.android.internal.policy.PhoneWindow.superDispatchTouchEvent(PhoneWindow.java:1836)
at android.app.Activity.dispatchTouchEvent(Activity.java:3404)
at androidx.appcompat.view.WindowCallbackWrapper.dispatchTouchEvent(WindowCallbackWrapper.java:69)
at com.android.internal.policy.DecorView.dispatchTouchEvent(DecorView.java:433)
at android.view.View.dispatchPointerEvent(View.java:12755)
at android.view.ViewRootImpl$ViewPostImeInputStage.processPointerEvent(ViewRootImpl.java:5150)
at android.view.ViewRootImpl$ViewPostImeInputStage.onProcess(ViewRootImpl.java:4953)
at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:4470)
at android.view.ViewRootImpl$InputStage.onDeliverToNext(ViewRootImpl.java:4523)
at android.view.ViewRootImpl$InputStage.forward(ViewRootImpl.java:4489)
at android.view.ViewRootImpl$AsyncInputStage.forward(ViewRootImpl.java:4629)
at android.view.ViewRootImpl$InputStage.apply(ViewRootImpl.java:4497)
at android.view.ViewRootImpl$AsyncInputStage.apply(ViewRootImpl.java:4686)
at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:4470)
at android.view.ViewRootImpl$InputStage.onDeliverToNext(ViewRootImpl.java:4523)
at android.view.ViewRootImpl$InputStage.forward(ViewRootImpl.java:4489)
at android.view.ViewRootImpl$InputStage.apply(ViewRootImpl.java:4497)
at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:4470)
at android.view.ViewRootImpl.deliverInputEvent(ViewRootImpl.java:7192)
at android.view.ViewRootImpl.doProcessInputEvents(ViewRootImpl.java:7126)
at android.view.ViewRootImpl.enqueueInputEvent(ViewRootImpl.java:7087)
at android.view.ViewRootImpl$WindowInputEventReceiver.onInputEvent(ViewRootImpl.java:7295)
at android.view.InputEventReceiver.dispatchInputEvent(InputEventReceiver.java:193)
at android.view.InputEventReceiver.nativeConsumeBatchedInputEvents(Native Method)
at android.view.InputEventReceiver.consumeBatchedInputEvents(InputEventReceiver.java:184)
at android.view.ViewRootImpl.doConsumeBatchedInput(ViewRootImpl.java:7266)
at android.view.ViewRootImpl$ConsumeBatchedInputRunnable.run(ViewRootImpl.java:7318)
at android.view.Choreographer$CallbackRecord.run(Choreographer.java:949)
at android.view.Choreographer.doCallbacks(Choreographer.java:761)
at android.view.Choreographer.doFrame(Choreographer.java:690)
at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:935)
at android.os.Handler.handleCallback(Handler.java:873)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:193)
at android.app.ActivityThread.main(ActivityThread.java:6912)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:493)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:860)
使用CameraX.unbindAll()和CameraX.bindToLifecycle()的错误日志:
Error log using CameraX.unbindAll() and CameraX.bindToLifecycle():
E/Legacy-CameraDevice-JNI: getNativeWindow: Surface had no valid native window.
E/Legacy-CameraDevice-JNI: LegacyCameraDevice_nativeDetectSurfaceDimens: Could not retrieve native window from surface.
--------- beginning of crash
2019-05-09 16:49:29.155 31123-31144/com.android.example.cameraxbasic E/AndroidRuntime: FATAL EXCEPTION: CameraX-
Process: com.android.example.cameraxbasic, PID: 31123
java.lang.IllegalArgumentException: Surface was abandoned
at android.hardware.camera2.utils.SurfaceUtils.getSurfaceSize(SurfaceUtils.java:84)
at android.hardware.camera2.params.OutputConfiguration.<init>(OutputConfiguration.java:260)
at android.hardware.camera2.params.OutputConfiguration.<init>(OutputConfiguration.java:145)
at android.hardware.camera2.impl.CameraDeviceImpl.createCaptureSession(CameraDeviceImpl.java:518)
at androidx.camera.camera2.impl.CaptureSession.open(CaptureSession.java:196)
at androidx.camera.camera2.impl.Camera.openCaptureSession(Camera.java:535)
at androidx.camera.camera2.impl.Camera$StateCallback.onOpened(Camera.java:743)
at androidx.camera.core.CameraDeviceStateCallbacks$ComboDeviceStateCallback.onOpened(CameraDeviceStateCallbacks.java:99)
at android.hardware.camera2.impl.CameraDeviceImpl$1.run(CameraDeviceImpl.java:152)
at android.os.Handler.handleCallback(Handler.java:873)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:193)
at android.os.HandlerThread.run(HandlerThread.java:65)
Caused by: android.hardware.camera2.legacy.LegacyExceptionUtils$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:82)
at android.hardware.camera2.params.OutputConfiguration.<init>(OutputConfiguration.java:260)
at android.hardware.camera2.params.OutputConfiguration.<init>(OutputConfiguration.java:145)
at android.hardware.camera2.impl.CameraDeviceImpl.createCaptureSession(CameraDeviceImpl.java:518)
at androidx.camera.camera2.impl.CaptureSession.open(CaptureSession.java:196)
at androidx.camera.camera2.impl.Camera.openCaptureSession(Camera.java:535)
at androidx.camera.camera2.impl.Camera$StateCallback.onOpened(Camera.java:743)
at androidx.camera.core.CameraDeviceStateCallbacks$ComboDeviceStateCallback.onOpened(CameraDeviceStateCallbacks.java:99)
at android.hardware.camera2.impl.CameraDeviceImpl$1.run(CameraDeviceImpl.java:152)
at android.os.Handler.handleCallback(Handler.java:873)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:193)
at android.os.HandlerThread.run(HandlerThread.java:65)
--------- beginning of system
推荐答案
最后，我们在CameraX中获得Zoom API.请检查以下两种可用于缩放相机预览的方式.
Finally, we get the Zoom API in CameraX. Please check below two way which you can use to zoom the preview of camera.
捏缩放:
val scaleGestureDetector = ScaleGestureDetector(context, listener)
cameraTextureView.setOnTouchListener { _, event ->
scaleGestureDetector.onTouchEvent(event)
return@setOnTouchListener true
}
val listener = object : ScaleGestureDetector.SimpleOnScaleGestureListener() {
override fun onScale(detector: ScaleGestureDetector): Boolean {
val scale = cameraInfo.zoomRatio.value * detector.scaleFactor
cameraControl.setZoomRatio(scale)
return true
}
}
滑动以缩放(使用搜寻栏):
zoomSeekBar.setOnSeekBarChangeListener(object : SeekBar.OnSeekBarChangeListener {
override fun onProgressChanged(seekBar: SeekBar?, progress: Int, fromUser: Boolean) {
cameraControl.setLinearZoom(progress / 100.toFloat())
}
override fun onStartTrackingTouch(seekBar: SeekBar?) {}
override fun onStopTrackingTouch(seekBar: SeekBar?) {}
})
在下面使用以获取cameraControl:
Use below to get cameraControl:
val cameraControl = CameraX.getCameraControl(lensFacing)
代码参考链接: https://github.com/Pinkal7600/camera-samples/tree/master/CameraXBasic
这篇关于如何使用Android CameraX API缩放相机?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
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