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Android-er: Something about processing images in Android

Android-er: Something about processing images in Android

Something about processing images in Android

I will do some trial experience about image in Android programming. The list here will be updated once posted.

• Combine bitmap side-by-side
• Merge two image, overlap with Alpha
• Example to draw Bitmap with ShadowLayer
• Draw text on bitmap using Canvas.drawText()
• Merge images with PorterDuffXfermode
• Create frame on Bitmap image
• Create shadow frame for image
• Share bitmap between Activities
• Handle error of 'OutOfMemoryError' and 'Bitmap too large to be uploaded into a texture' for images/bitmaps
• Load scaled bitmap
• Fine tune scaled down bitmap to exact size
• Detect touch event and position on ImageView
• Get bitmap color on touched position in ImageView
• Detect touch and free draw on Bitmap
• Detect touch and draw rect on bitmap
• Create mirror bitmap with matrix
• Create upside down bitmap with matrix
• Convert Bitmap to Drawable with BitmapDrawable
• Combine bitmap, half/half
• Adjust HSV(Hue, Saturation and Value) of bitmap
• Scale bitmap with inDither and inPreferQualityOverSpeed
• Adjust saturation of Bitmap with ColorMatrix
• Set the rotation on a color axis of Bitmap with ColorMatrix
• Scale color and alpha of colormatrix with setScale()
• ColorMatrix.setConcat() to combine ColorMatrixs
• Convert Bitmap to gray-scale with ColorMatrix
• Learn how to use the Android NDK, by creating an image processing application
• Example to apply BlurMaskFilter on Bitmap
• Blur bitmap
• Blur bitmap using Convolution
• Sharpen bitmap using Convolution
• Good official lessons teach Caching Bitmaps and Managing Bitmap Memory

Related demo video:

The exercises have not take care the bitmap size, and any resizing. So don't test with big picture, otherwise OutOfMemoryError or "Bitmap too large to be uploaded into a texture" will happen.