I’m trying to make an app for create custom cards. I’d like to add some text over a custom background (a jpg image).
What is the best way of doing it? I’d need to show the user a preview of the card before send it to the server.
Thanks
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Answer
Use below code to achieve your requirement
Bitmap src = BitmapFactory.decodeResource(getResources(), R.drawable.yourimage); // the original file yourimage.jpg i added in resources Bitmap dest = Bitmap.createBitmap(src.getWidth(), src.getHeight(), Bitmap.Config.ARGB_8888); String yourText = "My custom Text adding to Image"; Canvas cs = new Canvas(dest); Paint tPaint = new Paint(); tPaint.setTextSize(35); tPaint.setColor(Color.BLUE); tPaint.setStyle(Style.FILL); cs.drawBitmap(src, 0f, 0f, null); float height = tPaint.measureText("yY"); float width = tPaint.measureText(yourText); float x_coord = (src.getWidth() - width)/2; cs.drawText(yourText, x_coord, height+15f, tPaint); // 15f is to put space between top edge and the text, if you want to change it, you can try { dest.compress(Bitmap.CompressFormat.JPEG, 100, new FileOutputStream(new File("/sdcard/ImageAfterAddingText.jpg"))); // dest is Bitmap, if you want to preview the final image, you can display it on screen also before saving } catch (FileNotFoundException e) { // TODO Auto-generated catch block e.printStackTrace(); }
You have to use below permission in manifest file.
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
For my device the path is /sdcard
to access external SD card, it may vary for other devices. Some devices may have /mnt/sdcard
may be it is for internal sd cards. Just check it while before using this code.
Actually I wrote the above code for some other question, which required time stamp on photo after captured from camera. I gave you the same solution with a little modifications for your specific requirement.
I hope you can understand this. If you have any doubts regarding code feel free to ask.