More work on collecting assist data.

Optimize parceling of AssistData (which is now renamed to
AssistStructure) by pooling duplicated class name strings.

Change text associated with a view node to a CharSequence,
so styling information comes along.

Include global text attributes -- size, colors, etc.

Introduce a new AssistContent structure, which allows us
to propagate information about the intent and data the
activity is looking at.  This further allows us to propagate
permission grants, so the assistant can dig in to that data.
The default implementation propagates the base intent of an
activity, so if for example you bring up the assistant while
doing a share the assistant itself has the same information
and access that was given to the share activity (so it could
for example share it in another way if it wanted to).

Did some optimization of loading PersistableBundle from xml,
to avoid duplicating hash maps and such.

Changed how we dispatch ACTION_ASSIST to no longer include
the more detailed AssistStructure (and new AssistContent)
data when launching; now the example code that intercepts
that needs to be sure to ask for assist data when it starts
its session.  This is more like it will finally be, and allows
us to get to the UI more quickly.

Change-Id: I88420a55761bf48d34ce3013e81bd96a0e087637

1 files changed, 50 insertions, 0 deletions

diff --git a/core/java/android/os/PooledStringReader.java b/core/java/android/os/PooledStringReader.java
new file mode 100644
index 0000000..7795957
--- /dev/null
+++ b/core/java/android/os/PooledStringReader.java
@@ -0,0 +1,50 @@
+/*
+ * 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 android.os;
+
+/**
+ * Helper class for reading pooling strings from a Parcel.  It must be used
+ * in conjunction with {@link android.os.PooledStringWriter}.  This really needs
+ * to be pushed in to Parcel itself, but doing that is...  complicated.
+ * @hide
+ */
+public class PooledStringReader {
+    private final Parcel mIn;
+
+    /**
+     * The pool of strings we have collected so far.
+     */
+    private final String[] mPool;
+
+    public PooledStringReader(Parcel in) {
+        mIn = in;
+        final int size = in.readInt();
+        mPool = new String[size];
+    }
+
+    public String readString() {
+        int idx = mIn.readInt();
+        if (idx >= 0) {
+            return mPool[idx];
+        } else {
+            idx = (-idx) - 1;
+            String str = mIn.readString();
+            mPool[idx] = str;
+            return str;
+        }
+    }
+}