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POCan Android camera intent specify pictureSize?
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copied!<p>From my current search, Android camera intent can not specify pictureSize. Since my app needs to be fast, I do not want to save a large size picture in sd card, then load it to a small size of Bitmap. I think it takes time. Plus, I need a gray scale image, rather than a color Bitmap. I know how to convert them, but again it takes time. </p> <p>I plan to take a picture at a specified size, and directly process the Y part (gray scale) in the YUV data in the memory.</p> <p>So does that mean I have to write my own camera app using camera API?</p> <p>Are there any good examples? Many examples I checked so far often do not consider autofocus. I add features in XML file: </p> <pre><code><uses-feature android:name="android.hardware.camera" /> <uses-feature android:name="android.hardware.camera.autofocus" /> </code></pre> <p>I add the auto focus mode to the camera parameter.</p> <pre><code>parameters.setFocusMode(Camera.Parameters.FOCUS_MODE_AUTO); </code></pre> <p>But it does not work. So I add autofocus command immediately before camera press button.</p> <pre><code>preview.camera.autoFocus(myAutoFocusCallback); preview.camera.takePicture(shutterCallback, rawCallback, jpegCallback); </code></pre> <p>But the autofocus takes some time, and until the preview becomes clear, the take pictures has been performed. Plus, I also want it to autofocus even if I do not press the camera button. How can I put autofocus nicely in it?</p> <p>Are there any good examples? Thanks.</p>

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