October 2017
Intermediate to advanced
294 pages
6h 49m
English
Content preview from Building Android UIs with Custom Views
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Measuring our custom view
In the quick example we built in the previous chapter, we delegated all sizes and measurement to the parent view itself. To be honest, we haven't even delegated it; we just didn't do anything specifically to take care of that. Being able to control the size and dimensions of our custom view is something we definitely need to pay some attention to. To start, we're going to override the onMeasure() method from view as follows:
@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
super.onMeasure(widthMeasureSpec, heightMeasureSpec);
}
Reading the Android documentation about the onMeasure() method, we should see we must call either setMeasuredDimension(int, int) or the superclass' onMeasure(int, ...
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