以编程方式更改PopupMenu项的标题 [英] Change PopupMenu items' title programmatically

问题描述

我有一个带有4个选项的PopupMenu:添加为朋友，邻居，同事和粉丝.我想做的是，如果您单击添加为朋友"，然后将该选项更改为删除朋友".

I have a PopupMenu with 4 options: add as friend, as neighbour, as workmate and as fan. What I want to do is if you click, lets say, on "Add as friend", then that option changes into "remove friend".

这是我到目前为止尝试过的:

Here's what I've tried so far:

活动:

private Menu menuOpts;

public void showPopup(View v) {
    Context wrapper = new ContextThemeWrapper(this, R.style.PopupPerfilAjeno);
    PopupMenu popup = new PopupMenu(wrapper, v);
    popup.setOnMenuItemClickListener(this);
    popup.inflate(R.menu.menu);
    popup.show();

    menuOpts = popup.getMenu();
}

@Override
public boolean onMenuItemClick(MenuItem item) {
    switch (item.getItemId()) {
        case R.id.add_friend:
            String add_as_friend = getString(R.string.add_as_friend );

            if (item.getTitle().toString().equals(add_as_friend )) {
                addContact(1, item);
            }
            else {
                removeContact(1, item);
            }
            return true;
        case R.id.add_workmate:
            //
            return true;
        case R.id.add_neighbour:
            //
            return true;
        case R.id.add_fan:
            //
            return true;
        default:
            return false;
    }
}
// circle: 1 = friend, 2 = workmate, 3 = neighbour, 4 = fan
private void addContact(final int circle, final MenuItem item) {

    switch (circle) {
        case 1:
            menuOpts.findItem(R.id.add_friend).setTitle(R.string.remove_friend);
             // this won't work either:
             // item.setTitle(R.string.remove_friend);
             break;
        case 2:
            menuOpts.findItem(R.id.add_workmate).setTitle(R.string.remove_workmate);
             break;
        case 3:
            menuOpts.findItem(R.id.add_neighbour).setTitle(R.string.remove_neighbour);
             break;
        case 4:
            menuOpts.findItem(R.id.add_fan).setTitle(R.string.remove_fan);
             break;
     }
 }

menu.xml:

<?xml version="1.0" encoding="utf-8"?>
<menu xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:android="http://schemas.android.com/apk/res/android">
    <item
        android:id="@+id/add_friend"
        android:orderInCategory="100"
        android:title="@string/add_as_friend"
        app:showAsAction="always" />
    <item
        android:id="@+id/add_workmate"
        android:orderInCategory="100"
        android:title="@string/add_as_workmate"
        app:showAsAction="always" />
    <item
        android:id="@+id/add_neighbour"
        android:orderInCategory="100"
        android:title="@string/add_as_neighbour"
        app:showAsAction="always" />
    <item
        android:id="@+id/add_fan"
        android:orderInCategory="100"
        android:title="@string/add_as_fan"
        app:showAsAction="always" />
</menu>

推荐答案

我找到了解决方案.我添加了4个布尔变量，并修改了showPopup和addContact方法，如下所示:

I've found a solution. I added 4 boolean variables and modified the showPopup and addContact methods like this:

private boolean friend, workmate, neighbour, fan;

public void showPopup(View v) {
    Context wrapper = new ContextThemeWrapper(this, R.style.PopupPerfilAjeno);
    PopupMenu popup = new PopupMenu(wrapper, v);
    popup.setOnMenuItemClickListener(this);
    popup.inflate(R.menu.menu);

    Menu menuOpts = popup.getMenu();

    if (friend) {
        menuOpts.getItem(0).setTitle(R.string.remove_friends);
    }
    if (workmate) {
        menuOpts.getItem(1).setTitle(R.string.remove_workamtes);
    }
    if (neighbour) {
        menuOpts.getItem(2).setTitle(R.string.remove_neighbours);
    }
    if (fan) {
        menuOpts.getItem(3).setTitle(R.string.remove_fans);
    }

    popup.show();
}

private void addContact(final int circle) {

    switch (circle) {
        case 1:
             friend = true;
             workmate = false;
             neighbour = false;
             fan = false;
             break;
        case 2:
             friend = false;
             workmate = true;
             neighbour = false;
             fan = false;
             break;
        case 3:
             friend = false;
             workmate = false;
             neighbour = true;
             fan = false;
             break;
        case 4:
             friend = false;
             workmate = false;
             neighbour = false;
             fan = true;
             break;
     }
 }

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