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  1. PO
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    <p>I try this code it has been working perfectly.</p> <pre><code>enter code here switch (event.getAction()) { case MotionEvent.ACTION_DOWN: mPath.reset(); mPath.moveTo(x, y); mX = x; mY = y; startPoint = new PointF(event.getX(), event.getY()); endPoint = new PointF(); invalidate(); break; case MotionEvent.ACTION_MOVE: float dx = Math.abs(x - mX); System.out.println("action move"); float dy = Math.abs(y - mY); if (dx &gt;= TOUCH_TOLERANCE || dy &gt;= TOUCH_TOLERANCE) { // currentDrawingPath.path.quadTo(mX,mY,(x + mX)/2, (y + mY)/2); } mX = x; mY = y; endPoint.x = event.getX(); endPoint.y = event.getY(); isDrawing = true; invalidate(); break; case MotionEvent.ACTION_UP: mPath.lineTo(mX, mY); float deltaX = endPoint.x-startPoint.x; float deltaY = endPoint.y-startPoint.y; float frac = (float) 0.1; float point_x_1 = startPoint.x + (float) ((1 - frac) * deltaX + frac * deltaY); float point_y_1 = startPoint.y + (float) ((1 - frac) * deltaY - frac * deltaX); float point_x_2 = endPoint.x; float point_y_2 = endPoint.y; float point_x_3 = startPoint.x + (float) ((1 - frac) * deltaX - frac * deltaY); float point_y_3 = startPoint.y + (float) ((1 - frac) * deltaY + frac * deltaX); mPath.moveTo(point_x_1, point_y_1); mPath.lineTo(point_x_2, point_y_2); mPath.lineTo(point_x_3, point_y_3); mPath.lineTo(point_x_1, point_y_1); mPath.lineTo(point_x_1, point_y_1); mCanvas.drawPath(mPath, ppaint); endPoint.x = event.getX(); endPoint.y = event.getY(); isDrawing = false; invalidate(); break; default: break; } </code></pre>
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    1. POHow do I draw an arrowhead (in Android)?
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    1. USKevin Rameshwaran
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      1. VTUpMod
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    1. COthanks.its worked for me...
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      1. USrams
    2. COVery nice solution. Thanks. I modified it to deliver a fixed size arrow head independent of zoom level/line length. All that's needed is to replace "float frac = (float) 0.1;" with int ARROWHEAD_LENGTH=20; float sideZ= (float) Math.sqrt(deltaX *deltaX + deltaY*deltaY); //Z=hypotenuse float frac = ARROWHEAD_LENGTH < sideZ ? ARROWHEAD_LENGTH/sideZ : 1.0f;"
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      1. USPeteH
 

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Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

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