Elibc: Access denied finding property “vendor.camera.aux.packagelist“

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E/libc: Access denied finding property “vendor.camera.aux.packagelist“

输出台日志：E/libc: Access denied finding property “vendor.camera.aux.packagelist” 前提：1.app有各类权限 2.app代码无明显问题 3.常见于扫码 4.画面很模糊，或者说像素很低，扫码小概率扫不出来

代码如下：

parameters.setPreviewSize(cameraResolution.x, cameraResolution.y); camera.setParameters(parameters); camera.setDisplayOrientation(90);

老的camera启动前设置参数，参数中的x和y得来的方式如下： 大概意思就是根据屏幕尺寸来计算的，遍历摄像头支持的所有分辨率，然后计算的： 笔者错误在于MAX_PREVIEW_PIXELS 这个值是老的 仅仅为800 * 1080 小于目前市面上的手机支持的屏幕像素 如p40为2340 × 1080 导致最终的的结果很小，以至于显示的就很模糊 但是未影响二维码解码

void initFromCameraParameters(Camera camera) { Camera.Parameters parameters = camera.getParameters(); WindowManager manager = (WindowManager) context.getSystemService(Context.WINDOW_SERVICE); Display display = manager.getDefaultDisplay(); int width = display.getWidth(); int height = display.getHeight(); if (width < height) { int temp = width; width = height; height = temp; } screenResolution = new Point(width, height); cameraResolution = findBestPreviewSizeValue(parameters, screenResolution, false); } private static Point findBestPreviewSizeValue(Camera.Parameters parameters, Point screenResolution, boolean portrait) { Point bestSize = null; int diff = Integer.MAX_VALUE; for (Camera.Size supportedPreviewSize : parameters.getSupportedPreviewSizes()) { int pixels = supportedPreviewSize.height * supportedPreviewSize.width; if (pixels < MIN_PREVIEW_PIXELS || pixels > MAX_PREVIEW_PIXELS) { continue; } int supportedWidth = portrait ? supportedPreviewSize.height : supportedPreviewSize.width; int supportedHeight = portrait ? supportedPreviewSize.width : supportedPreviewSize.height; int newDiff = Math.abs(screenResolution.x * supportedHeight - supportedWidth * screenResolution.y); if (newDiff == 0) { bestSize = new Point(supportedWidth, supportedHeight); break; } if (newDiff < diff) { bestSize = new Point(supportedWidth, supportedHeight); diff = newDiff; } } if (bestSize == null) { Camera.Size defaultSize = parameters.getPreviewSize(); bestSize = new Point(defaultSize.width, defaultSize.height); } return bestSize; }

本文标签： deniedfindinglibcAccessproperty