Android相机API ISO设置? [英] Android Camera API ISO Setting?

问题描述

有人知道在 Android SDK 中从哪里控制相机的 ISO 设置吗?这应该是可能的，因为 HTC Desire 上的本机相机应用程序具有 ISO 设置.

Would anyone know where to control the ISO setting for the camera from in the Android SDK ? It should be possible as the native camera application on the HTC Desire has ISO settings.

推荐答案

你应该看看方法 flatten(), unflatten(), android.hardware.Camera.Parameters 中的 get(String key)、set(String key, String value).还要考虑 该类的源代码.它可能会让事情变得更清楚.

you should take a look at the methods flatten(), unflatten(), get(String key), set(String key, String value) in android.hardware.Camera.Parameters. Also consider the source code of that class. It might make things clearer.

首先你需要获取Camera.Parameters.将其展开为 String 并对其进行调查.我正在开发 HTC Desire 并获得以下 String:

First you need to obtain the Camera.Parameters. Unflatten it to a String and investigate it. I am developing on a HTC Desire as well an get the following String:

sharpness-max=30;zoom=0;taking-picture-zoom=0;zoom-supported=true;sharpness-min=0;sharpness=10;contrast=5;whitebalance=auto;jpeg-quality=100;preview-format-values=yuv420sp;jpeg-thumbnail-quality=75;preview-format=yuv420sp;preview-size=640x480;focal-length=3.53;iso=auto;meter-mode=meter-center;front-camera-mode=mirror;flash-mode-values=off,auto,on,torch;preview-frame-rate-values=15;preview-frame-rate=15;focus-mode-values=auto,infinity;jpeg-thumbnail-width=640;jpeg-thumbnail-size-values=640x480,512x384,384x288,0x0;zoom-ratios=100,114,131,151,174,200;saturation-def=5;preview-size-values=1280x720,800x480,768x432,720x480,640x480,576x432,480x320,400x240,384x288,352x288,320x240,272x272,240x240,240x160,176x144,160x120;smart-contrast=off;picture-size-values=2592x1952,2592x1456,2592x1936,2592x1728,2592x1552,2048x1536,2048x1360,2048x1216,2048x1152,1600x1200,1584x1056,1280x960,1280x848,1280x768,1280x720,1024x768,640x480,640x416,640x384,640x368,512x384,400x400,272x272;contrast-min=0;min-exposure-compensation=-4;brightness-min=0;antibanding=auto;taking-picture-zoom-min=0;saturation-min=1;contrast-max=10;vertical-view-angle=42.5;taking-picture-zoom-max=21;contrast-def=5;brightness-max=6;horizontal-view-angle=54.8;brightness=3;jpeg-thumbnail-height=480;cam-mode=0;focus-mode=auto;sharpness-def=10;front-camera-mode-values=mirror,reverse;picture-format-values=jpeg;saturation-max=10;max-exposure-compensation=4;exposure-compensation=0;exposure-compensation-step=0.5;flash-mode=off;effect-values=none,mono,negative,solarize,sepia,posterize,aqua;meter-mode-values=meter-average,meter-center,meter-spot;picture-size=2592x1952;max-zoom=5;effect=none;saturation=5;whitebalance-values=auto,incandescent,fluorescent,daylight,cloudy-daylight;picture-format=jpeg;brightness-def=3;iso-values=auto,deblur,100,200,400,800,1250;enable-caf=off;antibanding-values=off,50hz,60hz,auto

所以基本上有一个名为 iso-values 的键来检索支持的值，还有一个键 iso 保存当前值.

So basically there is a key called iso-values to retrieve the supported values and a key iso which holds the current value.

您可以执行以下操作:

Camera cam = Camera.open();
Camera.Parameters camParams = cam.getParameters();
String supportedIsoValues = camParams.get("iso-values"); //supported values, comma separated String
camParams.set("iso", (String)newValue);
cam.setParameters(camParams);

关于未展平的参数，我假设 ISO 和曝光补偿设置之间存在差异.

And with reference to the unflattened parameters I would assume that there is a difference between the iso and exposure compensation settings.

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