how to draw text with background color using canvas
If you want to make like this then implement below code snippet:
/**
* PUT THIS METHOD FOR IMPLEMENT WATER-MARK IN COMMON FILE
*/
public static Bitmap waterMark(Bitmap src, String watermark) {
//get source image width and height
int w = src.getWidth();
int h = src.getHeight();
Bitmap result = Bitmap.createBitmap(w, h, src.getConfig());
Canvas canvas = new Canvas(result);
canvas.drawBitmap(src, 0, 0, null);
Paint paint = new Paint();
Paint.FontMetrics fm = new Paint.FontMetrics();
paint.setColor(Color.WHITE);
paint.getFontMetrics(fm);
int margin = 5;
canvas.drawRect(50 - margin, 50 + fm.top - margin,
50 + paint.measureText(watermark) + margin, 50 + fm.bottom
+ margin, paint);
paint.setColor(Color.RED);
canvas.drawText(watermark, 50, 50, paint);
return result;
}
// To Get Bitmap from URI:
private Bitmap getBitmapFromUri(String photoPath) {
Bitmap image = null;
BitmapFactory.Options options = new BitmapFactory.Options();
options.inPreferredConfig = Bitmap.Config.ARGB_8888;
Bitmap bitmap = BitmapFactory.decodeFile(photoPath, options);
return bitmap;
}
// Save Image :
private String SaveImage(Bitmap finalBitmap) {
String root = Environment.getExternalStorageDirectory().toString();
File myDir = new File(root + "/shareImage");
myDir.mkdirs();
Random generator = new Random();
int n = 10000;
n = generator.nextInt(n);
String fname = "Image" + n + ".jpg";
File file = new File(myDir, fname);
if (file.exists()) file.delete();
try {
FileOutputStream out = new FileOutputStream(file);
finalBitmap.compress(Bitmap.CompressFormat.JPEG, 20, out);
out.flush();
out.close();
} catch (Exception e) {
e.printStackTrace();
}
return file.getAbsolutePath();
}
// Call like this :
Bitmap bitmap = getBitmapFromUri(attachment.get(i).getPath()); // Enter here your Image path
Bitmap bitmapp = waterMark(bitmap, "ENTER YOUR TEXT FOR WATERMARK LABEL");
String path = SaveImage(bitmapp);
Uri uri = Uri.fromFile(new File(path));
Here at last from uri you can get a new implemented watermark image.
Hope this helps you.
Most likely two steps are needed here. you would draw a line along path first with color for background and then draw the text as indicated. Set the thickness of the line with a paint object. Also, changing the style of the paint can help with the effect. try FILL
, STROKE
or FILL_AND_STROKE
for different effects.
mpaint.setStyle(Paint.Style.STROKE);
mpaint.setStrokeWidth(strokeWidth);
Added sample to draw a path(rectangle) with red color:
Paint mPaint = new Paint();
mPaint.setColor(Color.RED);
Path mPath = new Path();
RectF mRectF = new RectF(20, 20, 240, 240);
mPath.addRect(mRectF, Path.Direction.CCW);
mPaint.setStrokeWidth(20);
mPaint.setStyle(Paint.Style.STROKE);
canvas.drawPath(mPath, mPaint);
Then draw text along same path (blue color):
mPaint.setColor(Color.BLUE);
mPaint.setStrokeWidth(0);
mPaint.setStyle(Paint.Style.FILL);
mPaint.setTextSize(20);
canvas.drawTextOnPath("Draw the text, with origin at (x,y), using the specified paint, along the specified path.", mPath, 0, 5, mPaint);