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ID naming in Android apps

If you are developing an Android application, you will encounter the following identifier for names in the XML files of the view and layouts:

<menu xmlns:android="http://schemas.android.com/apk/res/android">
    <item android:id="@+id/new_game"
          android:icon="@drawable/ic_new_game"
          android:title="@string/new_game" />
    <item android:id="@+id/quit"
          android:icon="@drawable/ic_quit"
          android:title="@string/quit" />
</menu>

and I'm really curious why this naming applies to identifiers. Is it because of Linux? What does this designation mean - @+id/...- does it have?

When I look at an attribute android:icon, I can interpret that it means that it ic_new_gameis in a folder with the ability to draw, and @means "is in" or I just assume that.

But id naming attributes are different because they also have a sign +. Can someone help me understand this agreement?

Thank.

+5
1

, Android, . + , -. @id/....

@drawable/... @string/... . .png, .jpg, .gif .xml, drawable. .

, XML , , <string name="some_name">Some Name</string>. , . @string/some_name.

. @layout/....

, Linux , , Linux.

.

+5

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