Android Utililty Methods Canvas Draw

List of utility methods to do Canvas Draw

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Description

The list of methods to do Canvas Draw are organized into topic(s).

Method

voiddrawCross(Bitmap bm, int x, int y)
draw Cross 
Canvas c = new Canvas(bm);
Paint p = new Paint();
p.setColor(0xffff0000);
c.drawLine(x - 4, y, x + 4, y, p);
c.drawLine(x, y - 4, x, y + 4, p);
voiddrawSelect(Bitmap bm, int x, int y, int cellWidth, int cellHeight)
draw Select 
Canvas canvas = new Canvas(bm);
canvas.drawColor(Color.TRANSPARENT,
        android.graphics.PorterDuff.Mode.CLEAR);
Paint paint = new Paint();
paint.setARGB(255, 255, 0, 0);
paint.setStyle(Style.STROKE);
paint.setStrokeWidth(3f);
canvas.drawRect(new Rect((x - 1) * cellWidth, (y - 1) * cellHeight,
...
voiddrawText(String strMsg, Canvas g, Paint paint, int setx, int sety, int fg, int bg)
draw Text 
paint.setColor(bg);
g.drawText(strMsg, setx + 1, sety, paint);
g.drawText(strMsg, setx, sety - 1, paint);
g.drawText(strMsg, setx, sety + 1, paint);
g.drawText(strMsg, setx - 1, sety, paint);
paint.setColor(fg);
g.drawText(strMsg, setx, sety, paint);
g.restore();
...
voiddrawTextAtCanvasCenter(Canvas canvas, Paint paint, String text)
draw Text At Canvas Center 
if (text == null) {
    return;
final int width = canvas.getWidth();
final int height = canvas.getHeight();
int offsetX, offsetY;
offsetX = calcXWhenAlignCenter(width, paint, text);
offsetY = calcYWhenAlignCenter(height, paint);
...
voidcircle(Canvas canvas, int color, int stroke, float x, float y, float radius)
circle 
Paint paint = new Paint();
paint.setColor(color);
paint.setStyle(Paint.Style.FILL_AND_STROKE);
paint.setStrokeWidth(stroke);
canvas.drawCircle(x, y, radius, paint);
voidrect(Canvas canvas, int color, int stroke, float x, float y, float width, float height)
rect 
Paint paint = new Paint();
paint.setColor(color);
paint.setStyle(Paint.Style.FILL_AND_STROKE);
paint.setStrokeWidth(stroke);
float leftx = x;
float topy = y;
float rightx = x + width;
float bottomy = y + height;
...
Bitmapadd(Bitmap firstlayer, Bitmap secondlayer)
combines to Bitmap s 
Bitmap data = Bitmap.createBitmap(secondlayer.getWidth(),
        secondlayer.getHeight(), secondlayer.getConfig());
Canvas temp = new Canvas(data);
temp.drawBitmap(secondlayer, 0, 0, null);
temp.drawBitmap(firstlayer, 0, 0, null);
return data;
Bitmapadd(Bitmap[] images)
combines to Bitmap s 
Bitmap data = Bitmap.createBitmap(images[0].getWidth(),
        images[0].getHeight(), images[0].getConfig());
Canvas temp = new Canvas(data);
for (int i = 0; i < images.length; i++) {
    temp.drawBitmap(images[i], 0, 0, null);
return data;