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전체 글 2757

Meaning of top, ascent, baseline, descent, bottom, and leading in Android's FontMetrics

Meaning of top, ascent, baseline, descent, bottom, and leading in Android's FontMetrics This seems like a basic question, but I couldn't find a similar one on SO. While reading the documentation, I was having trouble grasping the concepts. I want to understand what the difference is between top and ascent and also bottom and descent. And where exactly is the baseline? Do you have a diagram to he..

Development Tip 2020.09.25

In rails, how can I find out what caused a .save() to fail, other than validation errors?

In rails, how can I find out what caused a .save() to fail, other than validation errors? I have an ActiveRecord model which is returning true from valid? (and .errors is empty), but is returning false from save(). If the model instance is valid, how can I find out what's causing the save to fail? Check all your callbacks. I had a problem like this where I had and "after_validate" method that wa..

Development Tip 2020.09.25

I have an error: setOnItemClickListener cannot be used with a spinner, what is wrong?

I have an error: setOnItemClickListener cannot be used with a spinner, what is wrong? Kindly This is my code below, and I am pasting the error messages underneath: I am trying to use setOnItemClickListener on the spinner, is it permissible? @Override public void onItemClick(AdapterView arg0, View v, int index, long arg3) { if (quantity[index]=="Meter" ){ s1="Meter"; Toast.makeText(v.getContext()..

Development Tip 2020.09.25
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