Clean up interface between controller and view

Fixes: 110753321

Test: tested with test app, no regression
Change-Id: I482d9733bc5e1380d251a82ad2747807608e6d6c
diff --git a/packages/SystemUI/src/com/android/systemui/fingerprint/DialogViewCallback.java b/packages/SystemUI/src/com/android/systemui/fingerprint/DialogViewCallback.java
new file mode 100644
index 0000000..36fed57
--- /dev/null
+++ b/packages/SystemUI/src/com/android/systemui/fingerprint/DialogViewCallback.java
@@ -0,0 +1,46 @@
+/*
+ * Copyright (C) 2018 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.systemui.fingerprint;
+
+/**
+ * Callback interface for dialog views. These should be implemented by the controller (e.g.
+ * FingerprintDialogImpl) and passed into their views (e.g. FingerprintDialogView).
+ */
+public interface DialogViewCallback {
+    /**
+     * Invoked when the user cancels authentication by tapping outside the prompt, etc. The dialog
+     * should be dismissed.
+     */
+    void onUserCanceled();
+
+    /**
+     * Invoked when an error is shown. The dialog should be dismissed after a set amount of time.
+     */
+    void onErrorShown();
+
+    /**
+     * Invoked when the negative button is pressed. The client should be notified and the dialog
+     * should be dismissed.
+     */
+    void onNegativePressed();
+
+    /**
+     * Invoked when the positive button is pressed. The client should be notified and the dialog
+     * should be dismissed.
+     */
+    void onPositivePressed();
+}