popupwindow自定义半透明的菜单

Xml文件的内容（自定义的menu布局）

 

 

activity中的内容

private PopupWindow pop ;

private View layout;

privateintstatus = 2 ;//1.菜单弹出  2.菜单未弹出

private Button help,about;

public menuactivity extends Activity｛

publicboolean onKeyDown(int keyCode, KeyEvent event)｛

 

switch (keyCode) {

case KeyEvent.KEYCODE_MENU://按下menu键

              if(status == 1)

                  returnfalse;

              layout = getLayoutInflater().inflate(R.layout.menulayout, null);

              // 创建PopupWindow对象，并在指定位置弹出用于显示菜单的窗口

              pop = new PopupWindow(layout,LayoutParams.FILL_PARENT, LayoutParams.FILL_PARENT,true);

           pop.setBackgroundDrawable(new BitmapDrawable());//响应返回键必须要有这句，但是必须放在showAtLocation或者showAsDropDown之前有用,（或者null）

              // 设置弹出窗口的位置

              pop.showAtLocation(layout,Gravity.CENTER, 0, 0);

              pop.setFocusable(true);// menu菜单获得焦点如果没有获得焦点menu菜单中的按键事件无法响应

              //添加菜单选项的单击事件

              help = (Button) layout.findViewById(R.id.menu_help);

              about = (Button) layout.findViewById(R.id.menu_about);

              help.setOnClickListener(new OnClickListener() {

                 

                  @Override

                  publicvoid onClick(View v) {

                     pop.dismiss();

                     MobclickAgent.onEvent(PandaMain.this, getString(R.string.umid_clk_help));

                     startActivity(new Intent(PandaMain.this, ActivityHelp.class));

                  }

              });

              about.setOnClickListener(new OnClickListener() {

                 

                  @Override

                  publicvoid onClick(View v) {

                     MobclickAgent.onEvent(PandaMain.this, getString(R.string.umid_clk_about));

                      startActivity(new Intent(PandaMain.this, ActivityAbout.class));

                    

                  }

              });

              break;

case KeyEvent.KEYCODE_BACK:

              pop.dismiss();

              break;

}

｝