switch中出错：case expressions must be constant expressions

switch(v.getId()) {

case R.id.old_color_panel:

break;

case R.id.new_color_panel:

if (mListener != null) {

mListener.onColorChanged(mNewColor.getColor());

}

break;

}

dismiss();

如上的一段code,编译时出错，后来发现原来是

项目->右键->build path->configure path->Android->Is Library被勾选了，去掉Is library前的对勾即可.

参考链接：
http://blog.csdn.net/aaawqqq/article/details/20037407