Merge "Adding a utility class for listening disable rotation changes" into pi-dev

packages/SystemUI/shared/src/com/android/systemui/shared/system/RotationWatcher.java

@@ -0,0 +1,69 @@
+/*
+ * 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.shared.system;
+
+import android.content.Context;
+import android.os.RemoteException;
+import android.util.Log;
+import android.view.IRotationWatcher;
+import android.view.WindowManagerGlobal;
+
+public abstract class RotationWatcher {
+
+    private static final String TAG = "RotationWatcher";
+
+    private final Context mContext;
+
+    private final IRotationWatcher mWatcher = new IRotationWatcher.Stub() {
+
+        @Override
+        public void onRotationChanged(int rotation) {
+            RotationWatcher.this.onRotationChanged(rotation);
+
+        }
+    };
+
+    private boolean mIsWatching = false;
+
+    public RotationWatcher(Context context) {
+        mContext = context;
+    }
+
+    protected abstract void onRotationChanged(int rotation);
+
+    public void enable() {
+        if (!mIsWatching) {
+            try {
+                WindowManagerGlobal.getWindowManagerService().watchRotation(mWatcher,
+                        mContext.getDisplay().getDisplayId());
+                mIsWatching = true;
+            } catch (RemoteException e) {
+                Log.w(TAG, "Failed to set rotation watcher", e);
+            }
+        }
+    }
+
+    public void disable() {
+        if (mIsWatching) {
+            try {
+                WindowManagerGlobal.getWindowManagerService().removeRotationWatcher(mWatcher);
+                mIsWatching = false;
+            }  catch (RemoteException e) {
+                Log.w(TAG, "Failed to remove rotation watcher", e);
+            }
+        }
+    }
+}