@Override
 protected void onCreate(Bundle savedInstanceState) {
 super.onCreate(savedInstanceState);
 setContentView(R.layout.function_music);
 // 实例化新的窗口
 Window w = getWindow();
 // 获取默认显示数据
 Display display = w.getWindowManager().getDefaultDisplay();
 // 获取窗口的背景图片
 Resources resources = musicActivity.getResources();
 Drawable drawable = resources.getDrawable(R.drawable.operate_bg);
 // 设置窗口的背景图片
 w.setBackgroundDrawable(drawable);
 // 窗口的标题为空
 w.setTitle(null);
 // 定义窗口的宽和高
 int width = (int) (display.getWidth() * 0.8);
 int height = (int) (display.getHeight() * 0.5);
 // 设置窗口的大小
 w.setLayout(width, height);
 // 设置窗口的显示位置
 w.setGravity(Gravity.CENTER);
 // 设置窗口的属性
 WindowManager.LayoutParams wl = w.getAttributes();
 w.setAttributes(wl);
 // 获取控件
 findView();
}