[android] Refactored obtaining system advertising info to use observers instead of waiting based on loop in ui thread

android/src/com/mapswithme/maps/SplashActivity.java

@@ -14,9 +14,11 @@ import android.support.v7.app.AppCompatActivity;
 import android.view.View;
 
 import com.mapswithme.maps.ads.Banner;
+import com.mapswithme.maps.analytics.AdvertisingObserver;
 import com.mapswithme.maps.analytics.ExternalLibrariesMediator;
 import com.mapswithme.maps.base.BaseActivity;
 import com.mapswithme.maps.base.BaseActivityDelegate;
+import com.mapswithme.maps.base.Detachable;
 import com.mapswithme.maps.downloader.UpdaterDialogFragment;
 import com.mapswithme.maps.editor.ViralFragment;
 import com.mapswithme.maps.location.LocationHelper;
@@ -54,6 +56,7 @@ public class SplashActivity extends AppCompatActivity
   private boolean mPermissionsGranted;
   private boolean mNeedStoragePermission;
   private boolean mCanceled;
+  private boolean mWaitForAdvertisingInfo;
 
   @NonNull
   private final Runnable mWelcomeScreenDelayedTask = new Runnable()
@@ -88,13 +91,16 @@ public class SplashActivity extends AppCompatActivity
         return;
       }
 
-      ExternalLibrariesMediator mediator = ((MwmApplication) getApplicationContext()).getMediator();
+      ExternalLibrariesMediator mediator = MwmApplication.from(getApplicationContext()).getMediator();
       if (!mediator.isAdvertisingInfoObtained())
       {
-        UiThread.runLater(mInitCoreDelayedTask, DELAY);
+        LOGGER.i(TAG, "Advertising info not obtained yet, wait...");
+        mWaitForAdvertisingInfo = true;
         return;
       }
 
+      mWaitForAdvertisingInfo = false;
+
       if (!mediator.isLimitAdTrackingEnabled())
       {
         LOGGER.i(TAG, "Limit ad tracking disabled, sensitive tracking initialized");
@@ -134,6 +140,9 @@ public class SplashActivity extends AppCompatActivity
   @NonNull
   private final BaseActivityDelegate mBaseDelegate = new BaseActivityDelegate(this);
 
+  @NonNull
+  private final AdvertisingInfoObserver mAdvertisingObserver = new AdvertisingInfoObserver();
+
   public static void start(@NonNull Context context,
                            @Nullable Class<? extends Activity> activityToStart,
                            @Nullable Intent initialIntent)
@@ -205,6 +214,10 @@ public class SplashActivity extends AppCompatActivity
   {
     super.onStart();
     mBaseDelegate.onStart();
+    mAdvertisingObserver.attach(this);
+    ExternalLibrariesMediator mediator = MwmApplication.from(this).getMediator();
+    LOGGER.d(TAG, "Add advertising observer");
+    mediator.addAdvertisingObserver(mAdvertisingObserver);
   }
 
   @Override
@@ -261,6 +274,11 @@ public class SplashActivity extends AppCompatActivity
     if (storagePermissionsDialog != null)
       storagePermissionsDialog.dismiss();
 
+    runInitCoreTask();
+  }
+
+  private void runInitCoreTask()
+  {
     UiThread.runLater(mInitCoreDelayedTask, DELAY);
   }
 
@@ -281,6 +299,10 @@ public class SplashActivity extends AppCompatActivity
   {
     super.onStop();
     mBaseDelegate.onStop();
+    mAdvertisingObserver.detach();
+    ExternalLibrariesMediator mediator = MwmApplication.from(this).getMediator();
+    LOGGER.d(TAG, "Remove advertising observer");
+    mediator.removeAdvertisingObserver(mAdvertisingObserver);
   }
 
   @Override
@@ -434,4 +456,44 @@ public class SplashActivity extends AppCompatActivity
 
     throw new IllegalArgumentException("Attempt to apply unsupported theme: " + theme);
   }
+
+  boolean isWaitForAdvertisingInfo()
+  {
+    return mWaitForAdvertisingInfo;
+  }
+
+  private static class AdvertisingInfoObserver implements AdvertisingObserver,
+                                                          Detachable<SplashActivity>
+  {
+    @Nullable
+    private SplashActivity mActivity;
+
+    @Override
+    public void onAdvertisingInfoObtained()
+    {
+      LOGGER.i(TAG, "Advertising info obtained");
+      if (mActivity == null)
+        return;
+
+      if (!mActivity.isWaitForAdvertisingInfo())
+      {
+        LOGGER.i(TAG, "Advertising info not waited");
+        return;
+      }
+
+      mActivity.runInitCoreTask();
+    }
+
+    @Override
+    public void attach(@NonNull SplashActivity object)
+    {
+      mActivity = object;
+    }
+
+    @Override
+    public void detach()
+    {
+      mActivity = null;
+    }
+  }
 }

android/src/com/mapswithme/maps/analytics/AdvertisingObserver.java

@@ -0,0 +1,6 @@
+package com.mapswithme.maps.analytics;
+
+public interface AdvertisingObserver
+{
+  void onAdvertisingInfoObtained();
+}

android/src/com/mapswithme/maps/analytics/ExternalLibrariesMediator.java

@@ -33,6 +33,8 @@ import com.my.target.common.MyTargetPrivacy;
 import io.fabric.sdk.android.Fabric;
 
 import java.io.IOException;
+import java.util.ArrayList;
+import java.util.List;
 import java.util.Map;
 
 public class ExternalLibrariesMediator
@@ -51,6 +53,8 @@ public class ExternalLibrariesMediator
   private AdvertisingInfo mAdvertisingInfo;
   @Nullable
   private String mFirstLaunchDeepLink;
+  @NonNull
+  private List<AdvertisingObserver> mAdvertisingObservers = new ArrayList<>();
 
   public ExternalLibrariesMediator(@NonNull Application application)
   {
@@ -160,11 +164,18 @@ public class ExternalLibrariesMediator
   }
 
   @UiThread
-  void setAdvertisingInfo(@NonNull AdvertisingInfo info)
+  private void setAdvertisingInfo(@NonNull AdvertisingInfo info)
   {
     mAdvertisingInfo = info;
   }
 
+  @UiThread
+  private void notifyObservers()
+  {
+    for (AdvertisingObserver observer : mAdvertisingObservers)
+      observer.onAdvertisingInfoObtained();
+  }
+
   @UiThread
   public boolean isAdvertisingInfoObtained()
   {
@@ -210,6 +221,16 @@ public class ExternalLibrariesMediator
     return firstLaunchDeepLink;
   }
 
+  public void addAdvertisingObserver(@NonNull AdvertisingObserver observer)
+  {
+    mAdvertisingObservers.add(observer);
+  }
+
+  public void removeAdvertisingObserver(@NonNull AdvertisingObserver observer)
+  {
+    mAdvertisingObservers.remove(observer);
+  }
+
   private class FirstLaunchDeeplinkListener implements AppsFlyerConversionListener
   {
     @Override
@@ -288,6 +309,7 @@ public class ExternalLibrariesMediator
     {
       super.onPostExecute(info);
       mMediator.setAdvertisingInfo(info);
+      mMediator.notifyObservers();
     }
   }