Question

我正在尝试使用CameraX API来获取照片，但是在更新为新的API版本1.0.0-alpha06之后，它开始崩溃

CameraX.bindToLifecycle(...)

方法。

错误日志为：

Process: com.aximetria.aximetria.debug, PID: 2629
    java.lang.BootstrapMethodError: Exception from call site #2 bootstrap method
        at androidx.camera.core.Preview.updateListener(Preview.java:368)
        at androidx.camera.core.Preview.updateOutput(Preview.java:586)
        at androidx.camera.core.Preview.updateConfigAndOutput(Preview.java:363)
        at androidx.camera.core.Preview.onSuggestedResolutionUpdated(Preview.java:524)
        at androidx.camera.core.UseCase.updateSuggestedResolution(UseCase.java:408)
        at androidx.camera.core.CameraX.calculateSuggestedResolutions(CameraX.java:684)
        at androidx.camera.core.CameraX.bindToLifecycle(CameraX.java:195)
        at com.aximetria.aximetria.ui.main.profile.avatar.TakeAvatarPhotoFragment.initCamera(TakeAvatarPhotoFragment.kt:169)
        at com.aximetria.aximetria.ui.main.profile.avatar.TakeAvatarPhotoFragment.initCamera$default(TakeAvatarPhotoFragment.kt:117)
        at com.aximetria.aximetria.ui.main.profile.avatar.TakeAvatarPhotoFragment$onViewCreated$1.onPermissionsChecked(TakeAvatarPhotoFragment.kt:55)
    ...

我的代码是：

    private fun initCamera(reverseFacing: Boolean = false) {
        ...

        val previewConfig = PreviewConfig.Builder()
                .setTargetAspectRatio(AspectRatio.RATIO_4_3)
                .setLensFacing(lensFacing)
                .build()

        val preview = Preview(previewConfig)
        preview.setOnPreviewOutputUpdateListener { previewOutput ->
            val parent = binding.preview.parent as ViewGroup
            parent.removeView(binding.preview)
            parent.addView(binding.preview, 0)
            binding.preview.surfaceTexture = previewOutput.surfaceTexture
        }

        val captureConfig = ImageCaptureConfig.Builder()
                .setFlashMode(flashMode)
                .setLensFacing(lensFacing)
                .build()

        val capture = ImageCapture(captureConfig)

        binding.takeAPhoto.setOnClickListener {
            ...
            val imageFile = createTempFile(System.currentTimeMillis().toString(), ".jpg")
            capture.takePicture(imageFile, this, object : ImageCapture.OnImageSavedListener {
                override fun onImageSaved(file: File) {
                    ...
                }

                override fun onError(imageCaptureError: ImageCapture.ImageCaptureError, message: String, cause: Throwable?) {
                    ...
                }
            })
        }

        CameraX.bindToLifecycle(this, capture, preview)
    }

有人知道是什么原因导致崩溃的吗？我在文档中看不到任何相关信息（目前这对于CameraX已经过时了）

Answer 1

将以下几行添加到build.gradle（：app）文件中：

android{

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

Answer 2

将此添加到gradle中。

CameraX需要Java 8中的某些方法，因此我们需要相应地设置编译选项。在android块的末尾，在buildTypes之后，添加以下内容：

compileOptions {
    sourceCompatibility JavaVersion.VERSION_1_8
    targetCompatibility JavaVersion.VERSION_1_8
}

Answer 3

作为@ a-local-nobody，@stéphane-péchard和@yoonhok正确地指出了alpha-6版本库中的错误。回滚到alpha-05可以消除我的崩溃情况。

Answer 4

我通过将Java8添加到应用程序build.gradle中来解决此问题

compileOptions {
    sourceCompatibility JavaVersion.VERSION_1_8
    targetCompatibility JavaVersion.VERSION_1_8
}
kotlinOptions {
    jvmTarget = "1.8"
}

java.lang.BootstrapMethodError：CameraX（1.0.0-alpha06）上的调用站点＃2引导程序方法异常

4 个答案: