reset contact selection after batch invite

fixes #4452
Closes #4498
// FREEBIE

src/org/thoughtcrime/securesms/InviteActivity.java

@@ -34,6 +34,9 @@ import org.thoughtcrime.securesms.sms.MessageSender;
 import org.thoughtcrime.securesms.sms.OutgoingTextMessage;
 import org.thoughtcrime.securesms.util.ProgressDialogAsyncTask;
 import org.thoughtcrime.securesms.util.ViewUtil;
+import org.thoughtcrime.securesms.util.concurrent.ListenableFuture.Listener;
+
+import java.util.concurrent.ExecutionException;
 
 public class InviteActivity extends PassphraseRequiredActionBarActivity implements ContactSelectionListFragment.OnContactSelectedListener {
 
@@ -241,7 +244,15 @@ public class InviteActivity extends PassphraseRequiredActionBarActivity implemen
       final Context context = getContext();
       if (context == null) return;
 
-      ViewUtil.animateOut(smsSendFrame, slideOutAnimation);
+      ViewUtil.animateOut(smsSendFrame, slideOutAnimation).addListener(new Listener<Boolean>() {
+        @Override
+        public void onSuccess(Boolean result) {
+          contactsFragment.reset();
+        }
+
+        @Override
+        public void onFailure(ExecutionException e) {}
+      });
       Toast.makeText(context, R.string.InviteActivity_invitations_sent, Toast.LENGTH_LONG).show();
     }
   }

src/org/thoughtcrime/securesms/util/ViewUtil.java

@@ -37,6 +37,9 @@ import android.view.animation.Animation;
 import android.widget.LinearLayout.LayoutParams;
 import android.widget.TextView;
 
+import org.thoughtcrime.securesms.util.concurrent.ListenableFuture;
+import org.thoughtcrime.securesms.util.concurrent.SettableFuture;
+
 public class ViewUtil {
   @SuppressWarnings("deprecation")
   public static void setBackground(final @NonNull View v, final @Nullable Drawable drawable) {
@@ -130,21 +133,30 @@ public class ViewUtil {
     animateOut(view, getAlphaAnimation(1f, 0f, duration));
   }
 
-  public static void animateOut(final @NonNull View view, final @NonNull Animation animation) {
-    if (view.getVisibility() == View.GONE) return;
-
-    view.clearAnimation();
-    animation.reset();
-    animation.setStartTime(0);
-    animation.setAnimationListener(new Animation.AnimationListener() {
-      @Override public void onAnimationStart(Animation animation) {}
-      @Override public void onAnimationRepeat(Animation animation) {}
-      @Override public void onAnimationEnd(Animation animation) {
-        view.setVisibility(View.GONE);
-      }
-    });
-
-    view.startAnimation(animation);
+  public static ListenableFuture<Boolean> animateOut(final @NonNull View view, final @NonNull Animation animation) {
+    final SettableFuture future = new SettableFuture();
+    if (view.getVisibility() == View.GONE) {
+      future.set(true);
+    } else {
+      view.clearAnimation();
+      animation.reset();
+      animation.setStartTime(0);
+      animation.setAnimationListener(new Animation.AnimationListener() {
+        @Override
+        public void onAnimationStart(Animation animation) {}
+
+        @Override
+        public void onAnimationRepeat(Animation animation) {}
+
+        @Override
+        public void onAnimationEnd(Animation animation) {
+          view.setVisibility(View.GONE);
+          future.set(true);
+        }
+      });
+      view.startAnimation(animation);
+    }
+    return future;
   }
 
   public static void animateIn(final @NonNull View view, final @NonNull Animation animation) {