android activity窗口的大小及移動activity

Activity的窗口大小，其本質仍是經過windowManager來操做，WindowManger將其做爲一個window來控制大小

          WindowManager m = getWindowManager();
        Display d = m.getDefaultDisplay();
        android.view.WindowManager.LayoutParams p = getWindow().getAttributes();
        p.height = (int)(d.getHeight() *0.8);
        p.width = (int)(d.getWidth()*0.7);
        p.dimAmount = 0.0f;
        getWindow().setAttributes(p);