Advanced Android Tag Manager configuration

To extend the functionality of Google Tag Manager, you can add Function Call variables and Function Call tags. Function Call variables let you capture the values returned by calls to pre-registered functions. Function Call tags let you execute pre-registered functions (e.g., to trigger hits for additional measurement and remarketing tools that are not currently supported with tag templates in Tag Manager).

Add custom tags and variables

To add a custom tag or custom variable with a Function Call:

1. Implement a class that extends com.google.android.gms.tagmanager.CustomTagProvider or com.google.android.gms.tagmanager.CustomVariableProvider :

     import 
     
    android.support.annotation.Keep 
    ; 
    import 
     
    java.util.Map 
    ; 
    @Keep 
    public 
     
    class 
    HighScoreProvider 
     
    implements 
     
    com 
    . 
    google 
    . 
    android 
    . 
    gms 
    . 
    tagmanager 
    . 
    CustomVariableProvider 
     
    { 
     
    @Override 
     
    public 
     
    String 
     
    getValue 
    ( 
    Map<String 
    , 
     
    Object 
   >  
    map 
    ) 
     
    { 
     
    synchronized 
     
    ( 
    HighScoreProvider 
    . 
    class 
    ) 
     
    { 
     
    return 
     
    (( 
    Long 
    ) 
    sHighScore 
    ). 
    toString 
    (); 
     
    } 
     
    } 
     
    private 
     
    static 
     
    long 
     
    sHighScore 
     
    = 
     
    0 
    ; 
     
    public 
     
    static 
     
    void 
     
    recordScore 
    ( 
    long 
     
    score 
    ) 
     
    { 
     
    synchronized 
     
    ( 
    HighScoreProvider 
    . 
    class 
    ) 
     
    { 
     
    sHighScore 
     
    = 
     
    Math 
    . 
    max 
    ( 
    score 
    , 
     
    sHighScore 
    ); 
     
    } 
     
    } 
    } 
    
   

2. If you use ProGuard , make sure that the class names and methods are not obfuscated. Use the Keep annotation to specify this.

3. In Google Tag Manager's web interface, use the fully qualified class name to set up tags and variables: