获取cameraProviderFuture时CameraX崩溃

Question

使用第四步中的官方CameraX示例-实现预览用例：

     // Used to bind the lifecycle of cameras to the lifecycle owner
       val cameraProvider: ProcessCameraProvider = cameraProviderFuture.get()

我遇到车祸了：

2020-07-01 12:37:41.054 1767-1803/com.example.camera2 W/CameraX: CameraX initialize() failed
    androidx.camera.core.InitializationException: java.lang.NumberFormatException: For input string: "/dev/video0"
        at androidx.camera.core.CameraX.lambda$initInternal$7$CameraX(CameraX.java:1056)
        at androidx.camera.core.-$$Lambda$CameraX$PC4SOFGjuqUVT4bexY644vLmWFE.run(Unknown Source:8)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1167)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:641)
        at java.lang.Thread.run(Thread.java:764)
     Caused by: java.lang.NumberFormatException: For input string: "/dev/video0"
        at java.lang.Integer.parseInt(Integer.java:604)
        at java.lang.Integer.parseInt(Integer.java:650)
        at androidx.camera.camera2.internal.SupportedSurfaceCombination.getRecordSize(SupportedSurfaceCombination.java:1127)
        at androidx.camera.camera2.internal.SupportedSurfaceCombination.generateSurfaceSizeDefinition(SupportedSurfaceCombination.java:1086)
        at androidx.camera.camera2.internal.SupportedSurfaceCombination.<init>(SupportedSurfaceCombination.java:109)
        at androidx.camera.camera2.internal.Camera2DeviceSurfaceManager.init(Camera2DeviceSurfaceManager.java:87)
        at androidx.camera.camera2.internal.Camera2DeviceSurfaceManager.<init>(Camera2DeviceSurfaceManager.java:75)
        at androidx.camera.camera2.internal.Camera2DeviceSurfaceManager.<init>(Camera2DeviceSurfaceManager.java:67)
        at androidx.camera.camera2.Camera2Config.lambda$defaultConfig$0(Camera2Config.java:59)
        at androidx.camera.camera2.-$$Lambda$Camera2Config$mYXXnxW6sa_oF7xhp51ozRSO_ck.newInstance(Unknown Source:0)
        at androidx.camera.core.CameraX.lambda$initInternal$7$CameraX(CameraX.java:1034)
        at androidx.camera.core.-$$Lambda$CameraX$PC4SOFGjuqUVT4bexY644vLmWFE.run(Unknown Source:8) 
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1167) 
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:641) 
        at java.lang.Thread.run(Thread.java:764) 
2020-07-01 12:38:11.142 1767-1767/com.example.camera2 D/AndroidRuntime: Shutting down VM
2020-07-01 12:38:11.346 1767-1767/com.example.camera2 E/AndroidRuntime: FATAL EXCEPTION: main
    Process: com.example.camera2, PID: 1767
    java.lang.RuntimeException: java.lang.reflect.InvocationTargetException
        at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:503)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:858)
     Caused by: java.lang.reflect.InvocationTargetException
        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:858) 
     Caused by: java.util.concurrent.ExecutionException: androidx.camera.core.InitializationException: java.lang.NumberFormatException: For input string: "/dev/video0"
        at androidx.concurrent.futures.AbstractResolvableFuture.getDoneValue(AbstractResolvableFuture.java:518)
        at androidx.concurrent.futures.AbstractResolvableFuture.get(AbstractResolvableFuture.java:475)
        at androidx.concurrent.futures.CallbackToFutureAdapter$SafeFuture.get(CallbackToFutureAdapter.java:199)
        at androidx.camera.core.impl.utils.futures.FutureChain.get(FutureChain.java:155)
        at androidx.camera.core.impl.utils.futures.ChainingListenableFuture.get(ChainingListenableFuture.java:105)
        at com.example.camera2.MainActivity$startCamera$1.run(MainActivity.kt:75)
        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:6718)
        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:858) 
     Caused by: androidx.camera.core.InitializationException: java.lang.NumberFormatException: For input string: "/dev/video0"
        at androidx.camera.core.CameraX.lambda$initInternal$7$CameraX(CameraX.java:1056)
        at androidx.camera.core.-$$Lambda$CameraX$PC4SOFGjuqUVT4bexY644vLmWFE.run(Unknown Source:8)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1167)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:641)
        at java.lang.Thread.run(Thread.java:764)
     Caused by: java.lang.NumberFormatException: For input string: "/dev/video0"
        at java.lang.Integer.parseInt(Integer.java:604)
        at java.lang.Integer.parseInt(Integer.java:650)
        at androidx.camera.camera2.internal.SupportedSurfaceCombination.getRecordSize(SupportedSurfaceCombination.java:1127)
        at androidx.camera.camera2.internal.SupportedSurfaceCombination.generateSurfaceSizeDefinition(SupportedSurfaceCombination.java:1086)
        at androidx.camera.camera2.internal.SupportedSurfaceCombination.<init>(SupportedSurfaceCombination.java:109)
        at androidx.camera.camera2.internal.Camera2DeviceSurfaceManager.init(Camera2DeviceSurfaceManager.java:87)
        at androidx.camera.camera2.internal.Camera2DeviceSurfaceManager.<init>(Camera2DeviceSurfaceManager.java:75)
        at androidx.camera.camera2.internal.Camera2DeviceSurfaceManager.<init>(Camera2DeviceSurfaceManager.java:67)
        at androidx.camera.camera2.Camera2Config.lambda$defaultConfig$0(Camera2Config.java:59)
        at androidx.camera.camera2.-$$Lambda$Camera2Config$mYXXnxW6sa_oF7xhp51ozRSO_ck.newInstance(Unknown Source:0)
        at androidx.camera.core.CameraX.lambda$initInternal$7$CameraX(CameraX.java:1034)
        at androidx.camera.core.-$$Lambda$CameraX$PC4SOFGjuqUVT4bexY644vLmWFE.run(Unknown Source:8) 
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1167) 
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:641) 
        at java.lang.Thread.run(Thread.java:764) 
2020-07-01 12:38:11.481 1767-1767/com.example.camera2 I/Process: Sending signal. PID: 1767 SIG: 9

我使用的是带有两个摄像头的非库存设备，在Camera2Basic示例中工作得很好。在项目中设置最新的camerax库：

    compileOptions {
        sourceCompatibility JavaVersion.VERSION_1_8
        targetCompatibility JavaVersion.VERSION_1_8
    }
}

dependencies {
    def camerax_version = '1.0.0-beta06'
    implementation "androidx.camera:camera-core:${camerax_version}"
    implementation "androidx.camera:camera-camera2:$camerax_version"
    implementation "androidx.camera:camera-lifecycle:$camerax_version"
    implementation 'androidx.camera:camera-view:1.0.0-alpha13'
    implementation 'androidx.camera:camera-extensions:1.0.0-alpha13'

我尝试过手动设置CameraXConfig.Provider，但在get cameraProviderFuture上遇到了同样的问题。

谁有手动配置绑定到特定摄像头设备的ProcessCameraProvider的示例？也许有任何想法如何设置预览与特定的相机？

Answer 1

在我的例子中，问题是摄像头有外部HAL。根据CameraX官方团队的说法，answer目前还不支持。要检查摄像机HAL，请执行以下操作：

adb shell dumpsys media.camera

并在输出中检查android.info.supportedHardwareLevel，可能如下所示：

...
== Camera HAL device device@3.4/external//dev/video0 (v3.4) static information: ==
  Resource cost: 100
  Conflicting devices: None
  API1 info:
    Has a flash unit: false
    Facing: Front
    Orientation: 0
  API2 camera characteristics:
    Dumping camera metadata array: 52 / 52 entries, 2224 / 2224 bytes of extra data.
      Version: 1, Flags: 00000000
      android.info.supportedHardwareLevel (150000): byte[1]
        [EXTERNAL ]
...

为了避免这样的限制，我为我的情况注入了所需的相机分辨率和尺寸的自定义CameraDeviceSurfaceManager。解决方案是here。

Answer 2

你必须使用他们的摄像机的确切版本，否则它可能无法工作。

def camerax_version = "1.0.0-beta03"
// CameraX core library using camera2 implementation
implementation "androidx.camera:camera-camera2:$camerax_version"
// CameraX Lifecycle Library
implementation "androidx.camera:camera-lifecycle:$camerax_version"
// CameraX View class
implementation "androidx.camera:camera-view:1.0.0-alpha10"