如何实现android自定义弹出菜单？

Question

我想要设计弹出菜单，其项目可单击，类似于 Android 项目中的下图。非常感谢任何推荐。谢谢你。

Answer 1

您可以将 DialogFragment 用于自定义布局。因此，就像您创建一个片段一样，您也可以创建一个 DialogFragment，它将拥有自己的自定义布局和对话框功能。如下-

public class CustomDialogMenu extends DialogFragment {
    
    //global variables

    public static CustomDialogMenu newInstance() {
        Bundle args = new Bundle();
        CustomDialogMenu customDialogMenu = new CustomDialogMenu();
        customDialogMenu.setArguments(args);
        return customDialogMenu;
    }

    @Nullable
    @Override
    public View onCreateView(@NonNull LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {    
        return inflater.inflate(R.layout.custom_dialog_menu, container);
    }

    @Override
    public void onViewCreated(@NonNull View view, @Nullable Bundle savedInstanceState) {
        super.onViewCreated(view, savedInstanceState);
        ........

}

您可以像调用任何其他片段一样使用此片段，custom_dialog_menu.xml 将在对话框菜单中包含您想要的自定义视图。

您也可以在片段内调用此对话框。代码如下-

private void showCustomDialogMenu() {
    FragmentManager fm = getParentFragmentManager();
    CustomDialogMenu customDialogMenu= CustomDialogMenu.newInstance();
    customDialogMenu.setTargetFragment(this, 300);
    customDialogMenu.show(fm, "custom_dialog_menu");
}

有关详细信息，请遵循 this 代码路径。

编码愉快!!

Answer 2

你必须使用 PopupWindow(popupView, width, height, focusable) :

首先: 膨胀选项菜单

override fun onCreateOptionsMenu(menu: Menu, inflater: MenuInflater) {
    super.onCreateOptionsMenu(menu, inflater)
    inflater.inflate(R.menu.option_menu, menu)
}

第二个：覆盖onOptionsItemSelected：

override fun onOptionsItemSelected(item: MenuItem): Boolean = when (item.itemId) {
    R.id.popup_window -> {
        showPopup()
        true
    }   
}

这里是showPopup()的逻辑：

private fun showPopup() {
    val anchor =  requireActivity().findViewById<View>(R.id.popup_window) // set the menuOption as anchor so that the popup will display TOP RIGHT of the screen

   val inflater = requireContext().getSystemService(LAYOUT_INFLATER_SERVICE) as LayoutInflater // get layoutinflater from the system service
    val popupView = inflater.inflate(R.layout.popUp_window_options, null) // inflate the popUp_window_options wictch display on popup


    // create the popup window
    val width = LinearLayout.LayoutParams.WRAP_CONTENT
    val height = LinearLayout.LayoutParams.WRAP_CONTENT
    val focusable = true // lets taps outside the popup also dismiss it

    val popupWindow = PopupWindow(popupView, width, height, focusable)
    popupWindow.elevation = 10f // give it shadow

    PopupWindowCompat.showAsDropDown(popupWindow, anchor, 0, 0, Gravity.CENTER)
    PopupWindowCompat.setWindowLayoutType( popupWindow ,WindowManager.LayoutParams.FLAG_FULLSCREEN)

R.layout.popUp_window_options 是包含选项的布局。希望能帮助到你。问任何困惑。

之后你会得到类似的东西：

如何实现android自定义弹出菜单？

How to implement android custom popup menu?

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popupmenu

material-design