diff --git a/android/app/src/main/java/io/v/android/apps/reader/DeviceSetChooserActivity.java b/android/app/src/main/java/io/v/android/apps/reader/DeviceSetChooserActivity.java
index 60c79b5..2dfd53e 100644
--- a/android/app/src/main/java/io/v/android/apps/reader/DeviceSetChooserActivity.java
+++ b/android/app/src/main/java/io/v/android/apps/reader/DeviceSetChooserActivity.java
@@ -14,7 +14,9 @@
 import android.util.Log;
 import android.view.Menu;
 import android.view.MenuItem;
-import android.view.View;
+
+import com.google.common.util.concurrent.FutureCallback;
+import com.google.common.util.concurrent.Futures;
 
 /**
  * Activity that displays all the active device sets of this user.
@@ -47,14 +49,11 @@
 
         // Add device set FAB initialization
         mButtonAddDeviceSet = (FloatingActionButton) findViewById(R.id.button_add_device_set);
-        mButtonAddDeviceSet.setOnClickListener(new View.OnClickListener() {
-            @Override
-            public void onClick(View view) {
-                Intent intent = new Intent(Intent.ACTION_GET_CONTENT);
-                intent.setType(Constants.PDF_MIME_TYPE);
-                if (intent.resolveActivity(getPackageManager()) != null) {
-                    startActivityForResult(intent, CHOOSE_PDF_FILE_REQUEST);
-                }
+        mButtonAddDeviceSet.setOnClickListener(view -> {
+            Intent intent = new Intent(Intent.ACTION_GET_CONTENT);
+            intent.setType(Constants.PDF_MIME_TYPE);
+            if (intent.resolveActivity(getPackageManager()) != null) {
+                startActivityForResult(intent, CHOOSE_PDF_FILE_REQUEST);
             }
         });
     }
@@ -63,21 +62,31 @@
     protected void onStart() {
         super.onStart();
 
-        // The adapter for the recycler view
-        mAdapter = new DeviceSetListAdapter(this);
+        // Set the adapter only after the DB is initialized.
+        Futures.addCallback(getDB().onInitialized(), new FutureCallback<Void>() {
 
-        // When a file is clicked from the list, start the PdfViewerActivity.
-        mAdapter.setOnDeviceSetClickListener(new DeviceSetListAdapter.OnDeviceSetClickListener() {
             @Override
-            public void onDeviceSetClick(DeviceSetListAdapter adapter, View v, int position) {
-                Intent intent = PdfViewerActivity.createIntent(
-                        getApplicationContext(),
-                        adapter.getDeviceSetId(position));
-                startActivity(intent);
-            }
-        });
+            public void onSuccess(Void result) {
+                // The adapter for the recycler view
+                mAdapter = new DeviceSetListAdapter(DeviceSetChooserActivity.this);
 
-        mRecyclerView.setAdapter(mAdapter);
+                // When a file is clicked from the list, start the PdfViewerActivity.
+                mAdapter.setOnDeviceSetClickListener((adapter, v, position) -> {
+                    Intent intent = PdfViewerActivity.createIntent(
+                            getApplicationContext(),
+                            adapter.getDeviceSetId(position));
+                    startActivity(intent);
+                });
+
+                mRecyclerView.setAdapter(mAdapter);
+            }
+
+            @Override
+            public void onFailure(Throwable t) {
+                Log.e(TAG, "Could not initialize the database.", t);
+            }
+
+        }, Utils.mainThreadExecutor());
 
         // ItemTouchHelper for handling the swipe action.
         ItemTouchHelper.SimpleCallback touchCallback;
@@ -109,6 +118,10 @@
             mAdapter.stop();
         }
         mAdapter = null;
+
+        if (mRecyclerView != null) {
+            mRecyclerView.setAdapter(null);
+        }
     }
 
     @Override
diff --git a/android/app/src/main/java/io/v/android/apps/reader/DeviceSetListAdapter.java b/android/app/src/main/java/io/v/android/apps/reader/DeviceSetListAdapter.java
index cd5ed62..a8e3a0f 100644
--- a/android/app/src/main/java/io/v/android/apps/reader/DeviceSetListAdapter.java
+++ b/android/app/src/main/java/io/v/android/apps/reader/DeviceSetListAdapter.java
@@ -49,13 +49,10 @@
             mTextViewId = (TextView) mCardView.findViewById(R.id.device_set_list_item_id);
             mTextViewDevices = (TextView) mCardView.findViewById(R.id.device_set_list_item_devices);
 
-            mCardView.setOnClickListener(new View.OnClickListener() {
-                @Override
-                public void onClick(View v) {
-                    if (mClickListener != null) {
-                        mClickListener.onDeviceSetClick(
-                                DeviceSetListAdapter.this, v, getLayoutPosition());
-                    }
+            mCardView.setOnClickListener(view -> {
+                if (mClickListener != null) {
+                    mClickListener.onDeviceSetClick(
+                            DeviceSetListAdapter.this, view, getLayoutPosition());
                 }
             });
         }
diff --git a/android/app/src/main/java/io/v/android/apps/reader/Utils.java b/android/app/src/main/java/io/v/android/apps/reader/Utils.java
index ae9d2cd..ba8f93a 100644
--- a/android/app/src/main/java/io/v/android/apps/reader/Utils.java
+++ b/android/app/src/main/java/io/v/android/apps/reader/Utils.java
@@ -8,12 +8,15 @@
 import android.content.Context;
 import android.content.pm.PackageManager;
 import android.os.Environment;
+import android.os.Handler;
+import android.os.Looper;
 import android.support.v4.content.ContextCompat;
 
 import java.io.File;
 import java.text.SimpleDateFormat;
 import java.util.Date;
 import java.util.Locale;
+import java.util.concurrent.Executor;
 
 /**
  * Utility class which contains useful static methods.
@@ -54,4 +57,20 @@
         return formatter.format(new Date());
     }
 
+    /**
+     * Returns an {@link Executor} which runs the provided task in the main thread.
+     */
+    public static MainThreadExecutor mainThreadExecutor() {
+        return new MainThreadExecutor();
+    }
+
+    private static class MainThreadExecutor implements Executor {
+        private final Handler mHandler = new Handler(Looper.getMainLooper());
+
+        @Override
+        public void execute(Runnable command) {
+            mHandler.post(command);
+        }
+    }
+
 }
diff --git a/android/app/src/main/java/io/v/android/apps/reader/db/DB.java b/android/app/src/main/java/io/v/android/apps/reader/db/DB.java
index 30a6ec2..4175fe9 100644
--- a/android/app/src/main/java/io/v/android/apps/reader/db/DB.java
+++ b/android/app/src/main/java/io/v/android/apps/reader/db/DB.java
@@ -7,6 +7,8 @@
 import android.app.Activity;
 import android.content.Context;
 
+import com.google.common.util.concurrent.ListenableFuture;
+
 import java.io.Closeable;
 import java.io.IOException;
 import java.io.InputStream;
@@ -59,6 +61,11 @@
     void init(Activity activity);
 
     /**
+     * Returns a ListenableFuture that completes once the database initialization is finished.
+     */
+    ListenableFuture<Void> onInitialized();
+
+    /**
      * Tells if initialization process is completed.
      *
      * @return true if the initialization process is completed.
diff --git a/android/app/src/main/java/io/v/android/apps/reader/db/FakeDB.java b/android/app/src/main/java/io/v/android/apps/reader/db/FakeDB.java
index faeca92..0e6be15 100644
--- a/android/app/src/main/java/io/v/android/apps/reader/db/FakeDB.java
+++ b/android/app/src/main/java/io/v/android/apps/reader/db/FakeDB.java
@@ -8,6 +8,9 @@
 import android.content.Context;
 import android.util.Log;
 
+import com.google.common.util.concurrent.Futures;
+import com.google.common.util.concurrent.ListenableFuture;
+
 import java.io.ByteArrayOutputStream;
 import java.io.FileInputStream;
 import java.io.FileOutputStream;
@@ -214,6 +217,11 @@
     }
 
     @Override
+    public ListenableFuture<Void> onInitialized() {
+        return Futures.immediateFuture(null);
+    }
+
+    @Override
     public boolean isInitialized() {
         return true;
     }
diff --git a/android/app/src/main/java/io/v/android/apps/reader/db/SyncbaseDB.java b/android/app/src/main/java/io/v/android/apps/reader/db/SyncbaseDB.java
index 5a97e0b..e8ece47 100644
--- a/android/app/src/main/java/io/v/android/apps/reader/db/SyncbaseDB.java
+++ b/android/app/src/main/java/io/v/android/apps/reader/db/SyncbaseDB.java
@@ -17,6 +17,7 @@
 import com.google.common.util.concurrent.FutureCallback;
 import com.google.common.util.concurrent.Futures;
 import com.google.common.util.concurrent.ListenableFuture;
+import com.google.common.util.concurrent.SettableFuture;
 
 import org.apache.commons.io.FileUtils;
 
@@ -99,7 +100,8 @@
     private Context mContext;
     private VContext mVContext;
     private SyncbaseHierarchy mLocalSB;
-    private boolean mInitialized;
+
+    private SettableFuture<Void> mInitialized;
 
     private String mUsername;
     private String mSyncgroupName;
@@ -110,11 +112,13 @@
 
     @Override
     public void init(Activity activity) {
-        if (isInitialized()) {
-            // Already initialized.
+        // Make sure that the initialization logic runs at most once.
+        if (mInitialized != null) {
             return;
         }
 
+        mInitialized = SettableFuture.create();
+
         if (mVContext == null) {
             if (activity instanceof VAndroidContextMixin) {
                 // In case of the activity inherits from one of the baku-toolkit's base activities,
@@ -160,10 +164,15 @@
     }
 
     @Override
-    public boolean isInitialized() {
+    public ListenableFuture<Void> onInitialized() {
         return mInitialized;
     }
 
+    @Override
+    public boolean isInitialized() {
+        return mInitialized != null && mInitialized.isDone();
+    }
+
     private void getBlessings() {
         ListenableFuture<Blessings> blessingsFuture = BlessingsManager
                 .getBlessings(mContext, "VanadiumBlessings", true);
@@ -325,7 +334,7 @@
             return;
         }
 
-        mInitialized = true;
+        mInitialized.set(null);
 
         // When successfully joined the syncgroup, first register the device information.
         registerDevice();
@@ -424,7 +433,7 @@
 
     @Override
     public DBList<File> getFileList() {
-        if (!mInitialized) {
+        if (!isInitialized()) {
             return new EmptyList<>();
         }
 
@@ -433,7 +442,7 @@
 
     @Override
     public DBList<Device> getDeviceList() {
-        if (!mInitialized) {
+        if (!isInitialized()) {
             return new EmptyList<>();
         }
 
@@ -442,7 +451,7 @@
 
     @Override
     public DBList<DeviceSet> getDeviceSetList() {
-        if (!mInitialized) {
+        if (!isInitialized()) {
             return new EmptyList<>();
         }