我得到以下警告，当我实例化了我ArrayAdapter（编译罚款）：

I get the following warning when I instantiate my ArrayAdapter (compiles fine):

warning: [unchecked] unchecked call to ArrayAdapter(android.content.Context,int,java.util.List<T>) as a member of the raw type android.widget.ArrayAdapter
      ArrayAdapter spinnerArrayAdapter = new ArrayAdapter(CFAMain.this, android.R.layout.simple_spinner_dropdown_item, spinnerArray);

和这里的问题行：

ArrayAdapter spinnerArrayAdapter = new ArrayAdapter(CFAMain.this, android.R.layout.simple_spinner_dropdown_item, spinnerArray);

任何人有任何想法，为什么它给我这个警告呢？

Anyone have any ideas as to why it's giving me this warning?

推荐答案

这是因为 ArrayAdapter 希望你可以指定它会操纵的对象类型。因此，为了避免这些警告只是做：

That's because ArrayAdapter expects you to specify which type of object it will manipulate. So, in order to avoid those warnings just do:

ArrayAdapter<String> spinnerArrayAdapter = new ArrayAdapter<String>(CFAMain.this, android.R.layout.simple_spinner_dropdown_item, spinnerArray);