未经检查的ArrayAdapter调用

Question

当我实例化我的ArrayAdapter(编译正常)时,我收到以下警告:

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);

这是问题所在:

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

任何人都有任何想法,为什么它给我这个警告？

Answer 1

那是因为ArrayAdapter期望你指定它将操纵哪种类型的对象.所以,为了避免这些警告,只需:

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