Implement InCallUiLock

When any locks are acquired, the InCallActivity will not auto-finish when there are no active calls. The disconnected cause and reject with SMS dialogs are migrated to use this API, which prevents the activity form ending before the user has finished interacting with the dialogs.

Bug: 64215256
Test: InCallPresenterTest
PiperOrigin-RevId: 171362338
Change-Id: Ied07ebbf6bee056ea6b2314c57f3324561b1651a

1 files changed, 29 insertions, 0 deletions

diff --git a/java/com/android/incallui/incalluilock/InCallUiLock.java b/java/com/android/incallui/incalluilock/InCallUiLock.java
new file mode 100644
index 000000000..fbeae613a
--- /dev/null
+++ b/java/com/android/incallui/incalluilock/InCallUiLock.java
@@ -0,0 +1,29 @@
+/*
+ * Copyright (C) 2017 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License
+ */
+
+package com.android.incallui.incalluilock;
+
+/**
+ * Prevents the {@link com.android.incallui.InCallActivity} from auto-finishing where there are no
+ * calls left. Acquired through {@link
+ * com.android.incallui.InCallPresenter#acquireInCallUiLock(String)}. Example: when a dialog is
+ * still being displayed to the user the InCallActivity should not disappear abruptly when the call
+ * ends, this lock should be held to keep the activity alive until it is dismissed.
+ */
+public interface InCallUiLock {
+
+  void release();
+}