I'm trying to create a button in a custom view that I've created. I'm
looping through an XML document and drawing certain things. I want to
be able to also create buttons to go in certain locations depending on
the xml data. I'd like to do it in the view because I want to be able
to call invalidate() on my view to redraw things and replace the
buttons when new xml data is available.
The problem is that I put my code in the view class, the activity
crashes because the button is "null". Here is a subset of my code:
Java:
@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
("AdherenceInterval");
int reminderLength = reminderNodes.getLength();
Button checkbox = (Button) findViewById(R.id.checkbox);
checkbox.setLayoutParams(new AbsoluteLayout.LayoutParams
(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT, 0, 0));
checkbox.setOnClickListener(new Button.OnClickListener() {
public void onClick(View v) {
Context context = v.getContext();
Intent i = new Intent(context,
ReportMedications.class);
context.startActivity(i);
}
});
I know this code works for creating buttons because I can put it in my
activity class and it works just fine. Any suggestions? I thought
about relocating the button in the activity, but I can't figure out
how to do this when new data is available.
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