Ok, thanks for the replies. I'm going to describe what I'm trying to
do better, because I'm still unsure of the solution, and I could
really use some help.
I have a clock application (how can you attache an image). For each
shaded region I want to place a button on top of it (a different
button depending on some xml data). I don't know how to create a
button from the attached image and then draw it in the correct spot.
My xml data has the time of the shaded region, so I can figure out
what angle to put the button. Below is the relevant code from my
ClockView class. The for loop is looping through each element in an
xml document (which I pass from the activity class).
Java:
public class ClockView extends View {
protected Document clockXML;
public ClockView(Context context) {
super(context);
this.setBackgroundDrawable(getResources().getDrawable
(R.drawable.clockbackgroundwithoutnames));
}
@Override
protected void onDraw(Canvas canvas) {
// Clock-size rectangle to draw compliance windows
RectF clockRect = new RectF(86, 6, 394, 314);
// Create a node list containing each reminder
NodeList reminderNodes = this.clockXML.getElementsByTagName
("Reminder");
int reminderLength = reminderNodes.getLength();
// Loop through each reminder drawing compliance windows
for (int i=0; i < reminderLength; i++) {
String timeScheduledString = reminderNodes.item
(i).getFirstChild().getFirstChild().getNodeValue();
float timeScheduled = Float.valueOf
(timeScheduledString.trim());
String complianceWindowString = reminderNodes.item
(i).getFirstChild().getNextSibling().getFirstChild().getNodeValue();
float complianceWindow = Float.valueOf
(complianceWindowString.trim());
String administered = reminderNodes.item
(i).getFirstChild().getNextSibling().getNextSibling().getFirstChild
().getNodeValue().trim();
float compStartAngle = -90 + ((timeScheduled*360)/24) -
(complianceWindow*15);
float complianceSweepAngle = (complianceWindow*2)*15;
// If we are in the daytime.
if (compStartAngle < 90 && compStartAngle >= -90) {
// If a reminder is scheduled in the daytime, but
window overlaps into the night.
if ((compStartAngle + complianceSweepAngle) > 90)
{
// Compute new angles and sweeps
float startAngle1 = compStartAngle;
float sweepAngle1 = 90 - startAngle1;
// Draw for daytime
canvas.drawArc(clockRect, startAngle1,
sweepAngle1, true, this.amColor);
float sweepAngle2 = complianceSweepAngle -
sweepAngle1;
// Draw for nighttime
canvas.drawArc(clockRect, 90, sweepAngle2,
true, this.pmColor);
// Else, just draw normally.
} else {
canvas.drawArc(clockRect, compStartAngle,
complianceSweepAngle, true, this.amColor);
}
// If we are in the nighttime
} else if (compStartAngle >= 90) {
// If a reminder is scheduled in the nighttime,
but window overlaps into the day.
if ((compStartAngle + complianceSweepAngle) > 270)
{
// Compute new angles and sweeps
float startAngle2 = compStartAngle;
float sweepAngle3 = 270 - compStartAngle;
// Draw for nighttime
canvas.drawArc(clockRect, startAngle2,
sweepAngle3, true, this.pmColor);
float sweepAngle4 = complianceSweepAngle -
sweepAngle3;
// Draw for daytime
canvas.drawArc(clockRect, 270, sweepAngle4,
true, this.amColor);
// Else, just draw normally.
} else {
canvas.drawArc(clockRect, compStartAngle,
complianceSweepAngle, true, this.pmColor);
}
// If a reminder is scheduled in the early daytime, but
window overlaps into the nighttime (backwards)
} else {
// Compute new angles and sweeps
float startAngle3 = compStartAngle;
float sweepAngle5 = -90 - compStartAngle;
// Draw for nighttime
canvas.drawArc(clockRect, startAngle3,
sweepAngle5, true, this.pmColor);
float sweepAngle6 = complianceSweepAngle -
sweepAngle5;
// Draw for daytime
canvas.drawArc(clockRect, -90, sweepAngle6, true,
this.amColor);
}
// I want to create the buttons here for each
reminder
}
}
}
I'm sure if seeing my activity class is relevant. Know that my
activity class contains the same xml document. My onCreate just sets
the contentView to the ClockView and starts a thread to update the xml
document. How do I achieve putting these buttons where I want them?
I'm almost positive I can't do this in the layout xml because the
buttons location is determined by the xml data.
Suggestions?
On Mar 9, 12:23 am, Anonymous Anonymous <[email protected]>
wrote:
> Something like this?
>
> <?xml version="1.0" encoding="utf-8"?>
> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android";
> android:orientation="vertical" android:layout_width="fill_parent"
> android:layout_height="fill_parent">
>
> <Button android:layout_width="wrap_content"
> android:layout_height="wrap_content" android:text="Hello"
> android:background="@drawable/u_r_png" />
> </LinearLayout>
>
> On Mon, Mar 9, 2009 at 9:33 AM, xspotlivin <[email protected]> wrote:
>
> > I'd like to know how to make a button out of a PNG and display it on
> > my canvas (using drawBitmap?). When I click on this button, it will
> > take me to a new activity. All this will be in the onClickListener.
>
> > So, how do I take a PNG, make a button with it, and draw it on my
> > canvas? I looked at ImageButton, but I'm unsure how it works or how to
> > draw it on the canvas.
>
> > Thanks for your help. A code sample would also be greatly appreciated.
>
>
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