Adding initial implementation of Prediction client/service API

Test: Build sample app, ensure that app prediction service gets client
      requests
Bug: 111701043
Change-Id: I33aceb2de31552b2d740dc333559d68728753e40
Signed-off-by: Winson Chung <winsonc@google.com>

1 files changed, 71 insertions, 0 deletions

diff --git a/packages/AppPredictionLib/src/com/android/app/prediction/Constants.java b/packages/AppPredictionLib/src/com/android/app/prediction/Constants.java
new file mode 100644
index 000000000000..0993c9a13f99
--- /dev/null
+++ b/packages/AppPredictionLib/src/com/android/app/prediction/Constants.java
@@ -0,0 +1,71 @@
+/*
+ * 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.app.prediction;
+
+/**
+ * Constants to be used with {@link android.app.prediction.AppPredictor}.
+ */
+public class Constants {
+
+    /**
+     * UI surface for predictions displayed on the user's home screen
+     */
+    public static final String UI_SURFACE_HOME = "home";
+
+    /**
+     * UI surface for predictions displayed on the recents/task switcher view
+     */
+    public static final String UI_SURFACE_RECENTS = "recents";
+
+    /**
+     * UI surface for predictions displayed on the share sheet.
+     */
+    public static final String UI_SURFACE_SHARE = "share";
+
+    /**
+     * Location constant when an app target or shortcut is started from the apps list
+     */
+    public static final String LAUNCH_LOCATION_APPS_LIST = "apps_list";
+
+    /**
+     * Location constant when an app target or shortcut is started from the user's home screen
+     */
+    public static final String LAUNCH_LOCATION_APPS_HOME = "home";
+
+    /**
+     * Location constant when an app target or shortcut is started from task switcher
+     */
+    public static final String LAUNCH_LOCATION_APPS_RECENTS = "recents";
+
+    /**
+     * Location constant when an app target or shortcut is started in the share sheet while it is
+     * in collapsed state (showing a limited set of result).
+     */
+    public static final String LAUNCH_LOCATION_APPS_SHARE_COLLAPSED = "share_collapsed";
+
+    /**
+     * Location constant when an app target or shortcut is started in the share sheet while it is
+     * in expended state and showing all the results.
+     */
+    public static final String LAUNCH_LOCATION_APPS_SHARE_EXPANDED = "shared_expanded";
+
+    /**
+     * Location constant when an app target or shortcut is started in the share sheet when the
+     * target is displayed as a placeholder for an deprecated object.
+     */
+    public static final String LAUNCH_LOCATION_APPS_SHARE_LEGACY = "share_legacy";
+}