对于editable = false,Android 4.0 EditText游标始终不可见

import java.lang.reflect.Field;

public class EditTextUtils {
    public static void setCursorVisible(EditText editText, boolean visible) {
        try {
            Field f = TextView.class.getDeclaredField("mCursorDrawableRes");
            f.setAccessible(true);
            int cursorDrawableRes = f.getInt(editText);
            Field f1 = TextView.class.getDeclaredField("mEditor");
            f1.setAccessible(true);
            Object editor = f1.get(editText);
            Class<?> clazz = editor.getClass();
            Field f2 = clazz.getDeclaredField("mCursorDrawable");
            f2.setAccessible(true);
            Drawable[] drawables = new Drawable[2];
            drawables[0] = editText.getContext().getResources().getDrawable(cursorDrawableRes);
            drawables[1] = editText.getContext().getResources().getDrawable(cursorDrawableRes);
            if (!visible) {
                drawables[0].setAlpha(0);
                drawables[1].setAlpha(0);
            }
            f2.set(editor, drawables);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}