Hi everyone!
I am trying to make a custom component, so for testing purposes I made a
view that draws a white line. The code for the component follows:
public class CGrafico extends SurfaceView implements SurfaceHolder.Callback{
public CGrafico(Context context) {
super(context);
}
public CGrafico(Context context, AttributeSet attrs) {
super(context, attrs);
}
public CGrafico(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
}
@Override
protected void onDraw(Canvas canvas)
{
super.onDraw(canvas);
Paint estilo = new Paint();
estilo.setARGB(255, 50, 55, 55);
canvas.drawLine(0.0f, 0.0f, 10.0f, 10.0f, estilo);
}
@Override
public void surfaceChanged(SurfaceHolder holder, int format, int width,
intheight) {
}
@Override
public void surfaceCreated(SurfaceHolder holder) {
}
@Override
public void surfaceDestroyed(SurfaceHolder holder) {
}
}
I declared it on the xml layout just with the android:layout_width and the
android:layout_height properties defined, both set to "fill_parent", and
the main class of the application just calls setContentView with the XML
layout as an argument.
My problem is that I have tested and the line the custom view was supposed
to draw is not appearing, in fact, the onDraw function is not even being
executed. I have tried to understand the example codes, and the developer
page on Canvas and drawing, but I am too much of a newbie to see what I am
doing wrong. Anyone have an idea on how to make it work?
Ricardo
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