AnalyticsTrackers.java

package com.mercandalli.android.apps.files.analytics;

import android.content.Context;
import android.support.annotation.NonNull;

import com.google.android.gms.analytics.GoogleAnalytics;
import com.google.android.gms.analytics.Tracker;
import com.mercandalli.android.apps.files.R;

import java.util.HashMap;
import java.util.Map;

/**
 * Google Analytics
 * A collection of Google Analytics trackers. Fetch the tracker you need using
 * {@code AnalyticsTrackers.getInstance().get(...)}
 * <p>
 * This code was generated by Android Studio but can be safely modified by
 * hand at this point.
 * <p>
 * TODO: Call {@link #initialize(Context)} from an entry point in your app
 * before using this!
 */
public final class AnalyticsTrackers {

    public enum Target {
        APP,
        // Add more trackers here if you need, and update the code in #get(Target) below
    }

    private static AnalyticsTrackers sInstance;

    public static synchronized void initialize(final Context context) {
        if (sInstance != null) {
            throw new IllegalStateException("Extra call to initialize analytics trackers");
        }

        sInstance = new AnalyticsTrackers(context);
    }

    /**
     * Instantiate the trackers.
     *
     * @return The instance.
     */
    public static synchronized AnalyticsTrackers getInstance() {
        if (sInstance == null) {
            throw new IllegalStateException("Call initialize() before getInstance()");
        }

        return sInstance;
    }

    @NonNull
    private final Context mContext;

    @NonNull
    private final Map<Target, Tracker> mTrackers = new HashMap<>();

    /**
     * Don't instantiate directly - use {@link #getInstance()} instead.
     */
    private AnalyticsTrackers(@NonNull final Context context) {
        mContext = context.getApplicationContext();
    }

    /**
     * Get the Google analytics {@link Tracker}.
     *
     * @param target The AnalyticsTrackers.Target.APP.
     * @return The {@link GoogleAnalytics} {@link Tracker}.
     */
    public synchronized Tracker get(final Target target) {
        if (!mTrackers.containsKey(target)) {
            Tracker tracker;
            switch (target) {
                case APP:
                    tracker = GoogleAnalytics.getInstance(mContext).newTracker(R.xml.app_tracker);
                    break;
                default:
                    throw new IllegalArgumentException("Unhandled analytics target " + target);
            }
            mTrackers.put(target, tracker);
        }

        return mTrackers.get(target);
    }
}