DialogActivity

public class CehuaDiaLayout extends Activity {
 protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.item_cehua_you);
        initListView();
        setFinishOnTouchOutside(true);
        WindowManager m = getWindowManager();
        Display d = m.getDefaultDisplay(); // 为获取屏幕宽、高
        android.view.WindowManager.LayoutParams p = getWindow().getAttributes();
        p.height = (int) (d.getHeight() * 0.3); // 高度设置为屏幕的0.3
        p.width = (int) (d.getWidth() * 0.7); // 宽度设置为屏幕的0.7
        getWindow().setAttributes(p);
        getWindow().setWindowAnimations(R.style.mystyle);//动画
        p.gravity = Gravity.RIGHT;//设置对话框置顶显示


    }
}