Why Android App-Indexing feature not works in Unity project when import it as a plugin.?

Questions & Answers
1

Hi, Currently our team is trying to enable App indexing and Autocomplete features in my Android game , for that we created an Sample Android App and tried to implement the App indexing as well as deep-linking .

In Android app side it worked properly. we tested the deep linking with following link

https://developers.google.com/app-indexing/android/test#test-autocompletions

And we tested Autocomplete in App by following link

https://codelabs.developers.google.com/codelabs/app-indexing/#0

so Both works correctly on App side … And i would like to specify that we have created an Android studio project with the same Package ID as our Unity Project …
Followed all the steps mentioned in Unity’s Android Plugin Manual.

For More details i am Including
My Java source code…

public class MainActivity extends UnityPlayerActivity
{
private static MainActivity sInstance;
private GoogleApiClient mClient;
private String mUrl;
private String mTitle;
private String mDescription;

public static MainActivity GetInstance()
{
    if(sInstance == null)
    {
        sInstance = new MainActivity();
    }
    return sInstance;
}

public int initFromUnity ()
{
    return  15;
}

public void OnCreateCall(Activity currentActivity)
{
    mUrl ="android-app://com.MyGames.firstgame/https/play.google.com/store/apps/";
    mTitle = "Master Chef";
    mDescription = "Become a Master Chef and run your own restaurant";
    mClient = new GoogleApiClient.Builder(currentActivity).addApi(AppIndex.API).build();
}

    public Action getAction()
    {
        Thing object = new Thing.Builder()
                .setName(mTitle)
                .setDescription(mDescription)
                .setUrl(Uri.parse(mUrl))
                .build();

        return new Action.Builder(Action.TYPE_VIEW)
                .setObject(object)
                .setActionStatus(Action.STATUS_TYPE_COMPLETED)
                .build();
    }

    public  void  OnStartCall()
    {
        mClient.connect();
        PendingResult<Status> result = AppIndex.AppIndexApi.start(mClient,getAction());
        result.setResultCallback(new ResultCallback<Status>()
        {
            @Override
            public void onResult(@NonNull Status status)
            {
                if(status.isSuccess())
                {
                    Log.d(MainActivity.class.getName(),"App Indexing API Recorded page"+ mTitle +"view successfully.");
                }
                else
                {
                    Log.e(MainActivity.class.getName(),"App Indexing API: There was an error recording the page view."+status.toString());
                }
            }
        });
    }

    public void  OnStopCall()
    {
        AppIndex.AppIndexApi.end(mClient, getAction());
        PendingResult<Status> result = AppIndex.AppIndexApi.end(mClient,getAction());
        mClient.disconnect();
        result.setResultCallback(new ResultCallback<Status>()
        {
            @Override
            public void onResult(@NonNull Status status)
            {
                if (status.isSuccess())
                {
                    Log.d(MainActivity.class.getName(), "App Indexing API Recorded page " + mTitle + " view end successfully.");
                }
                else
                {
                    Log.e(MainActivity.class.getName(), "App Indexing API: There was an error recording the page view." + status.toString());
                }

            }
        });
    }

===========================================================
public class AndroidEnableAppIndexing : MonoBehaviour
{
AndroidJavaObject mAppIndexingActivity;
AndroidJavaObject mCurrentActivity;
AndroidJavaClass appIndexingClass;

void Awake ()
{

	Debug.Log ("In Awake");
	#if !UNITY_EDITOR

	AndroidJavaClass unity = new AndroidJavaClass ("com.unity3d.player.UnityPlayer");

	mCurrentActivity = unity.GetStatic<AndroidJavaObject> ("currentActivity");

	appIndexingClass = new AndroidJavaClass ("com.MyGames.firstgame.MainActivity");

	mAppIndexingActivity = appIndexingClass.CallStatic<AndroidJavaObject> ("GetInstance");

	mAppIndexingActivity.Call ("OnCreateCall",mCurrentActivity);

	#endif
}

void Start()

{
	Debug.Log ("In Start");
	#if !UNITY_EDITOR
	mAppIndexingActivity.Call ("OnStartCall");
	#endif
}

void OnApplicationQuit() 
{
	Debug.Log("Application is going to quit.");
	#if !UNITY_EDITOR
	mAppIndexingActivity.Call ("OnStopCall");
	#endif
}

}

====================================================
In Unity project deep linking is working properly , but when i include the Jar File and try to access the methods from Jar file it shows the error No such method found as follows…

69444-screen-shot-2016-05-04-at-125242-pm.png
69444-screen-shot-2016-05-04-at-125242-pm.png1219×96 42.6 KB

One more observation is when i Comment the methods OnCreateCall(), OnStartCall,OnStopCall() ,which include google client API’s “initFromUnity” method is called successfully … do i need to add any class in unity project related to AppIndexing in a way that it should connect to the google client and work properly in Game.

2

What the error is saying is that the static method MainActivity doesn’t exist. You need to double check your code to see if there is an error. I just did a test like this:

using UnityEngine;
using System.Collections;
public class NewBehaviourScript : MonoBehaviour {
    AndroidJavaObject mAppIndexingActivity;
    void Start () {
        Debug.Log ("Start");
        AndroidJavaClass appIndexingClass = new AndroidJavaClass ("com.unity3d.ProductName.AppIndexingActivity");
        Debug.Log ("appIndexingClass: " + appIndexingClass);
        mAppIndexingActivity = appIndexingClass.CallStatic<AndroidJavaObject> ("GetInstance");
        Debug.Log ("mAppIndexingActivity: " + mAppIndexingActivity);
    }
}

And:

package com.unity3d.ProductName;
public class AppIndexingActivity {
    private static AppIndexingActivity sInstance;
    public static AppIndexingActivity GetInstance()
    {
        if(sInstance == null)
        {
            sInstance = new AppIndexingActivity();
        }
        return sInstance;
    }
}

The method was found correctly.