Jailing the saved instance state of all the dynamically generated views

Using itemId instead of generating a new id for each item. This is because
if the process gets killed, View.generateId will get reset but we will still
receive the generated item id map in onRestoreInstance. This will cause
conflicts with newly generated item ids.

We wrap all the generated homescreen views inside a single sparse array. This
ensures that we do not cause any conflict with dynamically generated views in
other parts of the UI.

Bug: 16840760
Change-Id: I6fe69c2e1dd463402f51222715fae31b9d4dd240

1 files changed, 52 insertions, 0 deletions

diff --git a/src/com/android/launcher3/util/ParcelableSparseArray.java b/src/com/android/launcher3/util/ParcelableSparseArray.java
new file mode 100644
index 000000000..093577e59
--- /dev/null
+++ b/src/com/android/launcher3/util/ParcelableSparseArray.java
@@ -0,0 +1,52 @@
+/**
+ * Copyright (C) 2015 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.launcher3.util;
+
+import android.os.Parcel;
+import android.os.Parcelable;
+import android.util.SparseArray;
+
+public class ParcelableSparseArray extends SparseArray<Parcelable> implements Parcelable {
+    public int describeContents() {
+        return 0;
+    }
+
+    public void writeToParcel(Parcel dest, int flags) {
+        final int count = size();
+        dest.writeInt(count);
+        for (int i = 0; i < count; i++) {
+            dest.writeInt(keyAt(i));
+            dest.writeParcelable(valueAt(i), 0);
+        }
+    }
+
+    public static final Parcelable.Creator<ParcelableSparseArray> CREATOR =
+            new Parcelable.Creator<ParcelableSparseArray>() {
+        public ParcelableSparseArray createFromParcel(Parcel source) {
+            final ParcelableSparseArray array = new ParcelableSparseArray();
+            final ClassLoader loader = array.getClass().getClassLoader();
+            final int count = source.readInt();
+            for (int i = 0; i < count; i++) {
+                array.put(source.readInt(), source.readParcelable(loader));
+            }
+            return array;
+        }
+
+        public ParcelableSparseArray[] newArray(int size) {
+            return new ParcelableSparseArray[size];
+        }
+    };
+}