How could I programatically generate an image (ie output_file.png) which is a combination of user input (ie. strings) overlaid on top of another image file?
Hopefully the image below can illustrate it better
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This might help you out: http://stackoverflow.com/questions/9575746/android-min-2-1-load-images-from-name-string – user3188799 Jan 13 '14 at 03:39
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Do you actually need to create an image? Are you trying to save it/share it or just display text overlaying an image?
If you just need to overlay, you can set a textview to overlay the image using a RelativeLayout.
If you want to save and share the image, you should take a look at How to programmatically take a screenshot in Android?
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Patrick Dattilio
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If you display this using a TextView overlaying the ImageView, you could have a live preview (even one that updates dynamically as they type.) Pushing a "save" button would then generate the bitmap using the method for which I provided the link. You could popup a preview of this generated bitmap for final confirmation before saving to file if you wanted. – Patrick Dattilio Jan 13 '14 at 04:08
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To write text directly into a bitmap you can do something similar to the following:
int textSize = (int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, 15, context.getResources().getDisplayMetrics());
Paint paint = new Paint();
paint.setAntiAlias(true);
paint.setSubpixelText(true);
paint.setStyle(Paint.Style.FILL);
paint.setTextSize(textSize);
paint.setColor(Color.WHITE);
Canvas myCanvas = new Canvas(myBitmap);
myCanvas.drawColor(Color.TRANSPARENT, PorterDuff.Mode.CLEAR);
myCanvas.drawText(string, x, y, paint);
To write the bitmap to a file you can read the answer to this question here: Convert Bitmap to File
