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Display A Bitmap In A Editbox In Droid


I have two bitmap images . And i need to merge the bitmaps with precise positioning of one bitmap over other and get a resultant bitmap (which is combination of both)

And the resultant bitmap is a font character and i want that bitmap to be displayed in a edit box where i am inputting text.


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Unable To Display Complete Bitmap In Droid Using Canvas / Get Full To Show

I am using following ondraw method to display bitmap on screen.code.

Image is displayed on the screen but some part because android screen is small
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Or

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First i load a textfile that looks like this (shortened):

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Code:.


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I essentially want to use this bitmap as a background image in my app and would like to repeat the bitmap in both the x and y directions.

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I am a beginner android developer and i am trying to have a button display on top of the bitmaps i am outputting.

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My activity sets this:

Code:.

Main.xml is framelayout that i stuck a button on top of, that's it.

I guess my question is, how do i insert something into the main.xml as a "canvas" in order to paste my bitmaps to, but still have the button always on top regardless of how many bitmaps i draw?


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Copypixelsfrombuffer() To Particular Bitmap Offset

I am working on an android application that deals with graphical operations in native code on a shared memory buffer. I have made functions to call my native code from java using jni, and my native code uses the jni api to call java from native code. Since copying large arrays of pixels has a significant effect on performance, i need to avoid it as much as possible.

The android documentation for the bitmap class talks of two ways for copying pixels onto the bitmap internal buffer: http://developer.android.com/reference/android/graphics/bitmap.html

Setpixels(int[] pixels, int offset, int stride, int x, int y, int width, int height) replace pixels in the bitmap with the colors in the array.copypixelsfrombuffer(buffer src) copy the pixels from the buffer, beginning at the current position, overwriting the bitmap's pixels.

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Copying only the region that i want at the cost of having pixel conversion

Or

Avoiding pixel conversion at the cost of copying the entire buffer every time

To get an idea, i may have a buffer representing a 1024x768 screen, with an invalid region that goes from (300, 300) to (400, 400).

If i copy only the region i need to update, i can copy and convert 100*100 pixels or copy without converting 1024*768 pixels. A 100x100 invalid region is small and only a particular case, most invalid regions would take a much larger portion of the buffer. Both methods have very negative effects on performance.

Does anybody have an idea on how i could copy pixels from my buffer to a particular offset on the target buffer, without forced pixel conversion? That would be the best of both worlds, and i don't see why it does not appear to be available.


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Code:.


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