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    <p>For drawing purposes, you should not really use the dimensions of the <code>Canvas</code> object.</p> <p>Just use the dimensions provided to you in the <code>onSizeChanged</code> method. You can either store the dimensions for use in the <code>onDraw</code> method or resize/draw to a backing bitmap that you can draw with later.</p> <p><strong>Update:</strong></p> <p>Quickly whipped up some code, it looks like this works:</p> <pre><code>public class CustomView extends View{ private Paint paint; private int w; private int h; public CustomView(Context context, AttributeSet attr) { super(context, attr); paint = new Paint(); paint.setTextAlign(Align.CENTER); } @Override protected void onSizeChanged(int w, int h, int oldw, int oldh) { this.w = w; this.h = h; super.onSizeChanged(w, h, oldw, oldh); } @Override protected void onDraw(Canvas canvas) { canvas.drawColor(Color.WHITE); canvas.drawText("TEST", w/2, h/2, paint); } } </code></pre> <p><strong>Update 2</strong></p> <p>Following the circle code update.</p> <p>We can do this:</p> <pre><code> @Override protected void onDraw(Canvas canvas) { canvas.drawColor(Color.WHITE); float centerX = (float) w/2; float centerY = (float) h/2; float radianAngle = (float) Math.toRadians(startAngle); radius[0] = centerX; radius[1] = centerY; radius[2] = centerX + centerX * FloatMath.cos(radianAngle); radius[3] = centerY + centerY * FloatMath.sin(radianAngle); paint.setColor(0xFF330000); paint.setStrokeWidth(1); canvas.drawLines(radius, paint); } </code></pre> <p>You'll see that this now works on any sized view.</p>
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    1. POHow can I get the canvas size of a custom view outside of the onDraw method?
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    1. POHow can I get the canvas size of a custom view outside of the onDraw method?
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    1. COI would be fine with that, but the onSizeChanged method does not give me proper numbers. For example, suppose I wanted to draw some text in the center of the view. If I store the values passed to onSizeChanged, and use those to determine where the text should be drawn, it is not drawn in the correct spot. If I use the canvas dimensions to determine where the text should be drawn, it works perfectly.
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    2. COIf you compare your w/2 & h/2 values to the results of the methods canvas.centerX() and canvas.centerY(), you'll see that the values are different.
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    3. COWhen I use your code, the text does not appear at all because w/2 and h/2 give coordinates that are larger than the canvas. Thus, the text is drawn in a place that is not displayed on the screen.
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