android - 在附加的堆栈跟踪中获取了资源但从未释放

问题描述

我正在使用 camera2 并收到以下异常：

04-13 20:39:54.801 13097-13110/com.x.y.z E/StrictMode: A resource was acquired at attached stack trace but never released. See java.io.Closeable for information on avoiding resource leaks.
    java.lang.Throwable: Explicit termination method 'release' not called
        at dalvik.system.CloseGuard.open(CloseGuard.java:184)
        at android.view.Surface.setNativeObjectLocked(Surface.java:460)
        at android.view.Surface.<init>(Surface.java:152)
        at android.media.ImageReader.nativeGetSurface(Native Method)
        at android.media.ImageReader.<init>(ImageReader.java:130)
        at android.media.ImageReader.newInstance(ImageReader.java:100)
        at androidx.camera.core.MetadataImageReader.createImageReaderProxy(MetadataImageReader.java:124)
        at androidx.camera.core.MetadataImageReader.<init>(MetadataImageReader.java:113)
        at androidx.camera.core.ImageCapture.createPipeline(ImageCapture.java:335)
        at androidx.camera.core.ImageCapture.onSuggestedResolutionUpdated(ImageCapture.java:974)
        at androidx.camera.core.UseCase.updateSuggestedResolution(UseCase.java:372)
        at androidx.camera.core.CameraX.bindToLifecycle(CameraX.java:321)
        at androidx.camera.lifecycle.ProcessCameraProvider.bindToLifecycle(ProcessCameraProvider.java:229)
        at com.x.y.z.fragments.CameraFragment$bindCameraUseCases$1.run(CameraFragment.kt:286)
        at android.os.Handler.handleCallback(Handler.java:815)
        at android.os.Handler.dispatchMessage(Handler.java:104)
        at android.os.Looper.loop(Looper.java:194)
        at android.app.ActivityThread.main(ActivityThread.java:5651)
        at java.lang.reflect.Method.invoke(Native Method)
        at java.lang.reflect.Method.invoke(Method.java:372)
        at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:959)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:754)

查看堆栈跟踪表明它来自尚未发布的 SurfaceView。检查参考表明在 Java 中你必须释放它；不太清楚如何在 Kotlin 中处理它。

顺便说一句，我稍微修改了 CameraXBasic，以便在触摸图库按钮时运行以下代码：

    // Listener for button used to view the most recent photo
    camControls.findViewById<ImageButton>(R.id.photo_view_button).setOnClickListener {
        pickFromGallery()
    }


private fun pickFromGallery() {
    val intent = Intent(Intent.ACTION_PICK)
    intent.type = "image/*"
    val mimeTypes =
        arrayOf("image/jpeg", "image/png")
    intent.putExtra(Intent.EXTRA_MIME_TYPES, mimeTypes)
    startActivityForResult(intent, GALLERY_REQUEST_CODE)
}

override fun onActivityResult(requestCode: Int, resultCode: Int, data: Intent?) {
    if (resultCode == Activity.RESULT_OK && requestCode == GALLERY_REQUEST_CODE){
        val selectedUri = data?.data
        val filePathColumn = MediaStore.Images.Media.DATA
        val cursor = context?.contentResolver?.query(selectedUri!!, arrayOf(filePathColumn), null, null, null)
        cursor?.moveToFirst()
        val columnIndex = cursor?.getColumnIndex(filePathColumn)
        val absolutePath = cursor?.getString(columnIndex!!)
        cursor?.close()

        if(absolutePath != null) setImagePathAndPopBack(File(absolutePath))
    }
}

此代码正确显示了选择图片库的选项，但如果我只是触摸外部以将其关闭，应用程序会因上述异常而崩溃。重现它的可靠方法是触摸图库图标并在不打开任何照片库的情况下将其关闭几次。只是为了清楚说明 onActivityResult 的大部分代码都没有执行，因为我什至没有选择任何图像。

构建.gradle：

implementation "androidx.camera:camera-core:1.0.0-beta02"
implementation "androidx.camera:camera-camera2:1.0.0-beta02"
implementation "androidx.camera:camera-lifecycle:1.0.0-beta02"
implementation "androidx.camera:camera-view:1.0.0-alpha09"

安卓工作室：3.6.2 科特林：1.3.61

提前感谢您的帮助！

编辑1：

我意识到只有在使用 StrictMode 时才会发生这种情况

StrictMode.setVmPolicy(
StrictMode.VmPolicy.Builder()
.detectLeakedClosableObjects()
.penaltyLog()
.penaltyDeath()
.build()
)

如果我运行我的代码而不使用惩罚死亡（），那么它的工作原理与示例一样顺利。

标签： androidkotlinsurfaceviewandroid-camera2android-camerax

android - 在附加的堆栈跟踪中获取了资源但从未释放 - kotlin

问题描述

解决方案

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