Add a sample showing the use of Transition along with AdapterViews

Change-Id: I14cc29445f511cb154b8a5dfd3ff3a10a898a039
diff --git a/ui/transition/AdapterTransition/AdapterTransitionSample/src/main/AndroidManifest.xml b/ui/transition/AdapterTransition/AdapterTransitionSample/src/main/AndroidManifest.xml
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+++ b/ui/transition/AdapterTransition/AdapterTransitionSample/src/main/AndroidManifest.xml
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+<?xml version="1.0" encoding="utf-8"?>
+<!--
+Copyright 2014 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.
+-->
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+    package="com.example.android.adaptertransition"
+    android:versionCode="1"
+    android:versionName="1.0">
+
+    <uses-sdk
+        android:minSdkVersion="19"
+        android:targetSdkVersion="19"/>
+
+    <application
+        android:allowBackup="true"
+        android:icon="@drawable/ic_launcher"
+        android:label="@string/app_name"
+        android:theme="@style/AppTheme">
+        <activity
+            android:name="com.example.android.adaptertransition.MainActivity"
+            android:label="@string/app_name">
+            <intent-filter>
+                <action android:name="android.intent.action.MAIN"/>
+
+                <category android:name="android.intent.category.LAUNCHER"/>
+            </intent-filter>
+        </activity>
+    </application>
+
+</manifest>
diff --git a/ui/transition/AdapterTransition/AdapterTransitionSample/src/main/java/com/example/android/adaptertransition/AdapterTransitionFragment.java b/ui/transition/AdapterTransition/AdapterTransitionSample/src/main/java/com/example/android/adaptertransition/AdapterTransitionFragment.java
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+++ b/ui/transition/AdapterTransition/AdapterTransitionSample/src/main/java/com/example/android/adaptertransition/AdapterTransitionFragment.java
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+/*
+ * Copyright 2014 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.example.android.adaptertransition;
+
+import android.os.Bundle;
+import android.support.v4.app.ActivityCompat;
+import android.support.v4.app.Fragment;
+import android.transition.AutoTransition;
+import android.transition.Scene;
+import android.transition.Transition;
+import android.transition.TransitionManager;
+import android.view.LayoutInflater;
+import android.view.Menu;
+import android.view.MenuInflater;
+import android.view.MenuItem;
+import android.view.View;
+import android.view.ViewGroup;
+import android.widget.AbsListView;
+import android.widget.FrameLayout;
+import android.widget.GridView;
+import android.widget.ListView;
+
+/**
+ * Main screen for AdapterTransition sample.
+ */
+public class AdapterTransitionFragment extends Fragment implements Transition.TransitionListener {
+
+    /**
+     * Since the transition framework requires all relevant views in a view hierarchy to be marked
+     * with IDs, we use this ID to mark the root view.
+     */
+    private static final int ROOT_ID = 1;
+
+    /**
+     * This is where we place our AdapterView (ListView / GridView).
+     */
+    private FrameLayout mContent;
+
+    /**
+     * This is where we carry out the transition.
+     */
+    private FrameLayout mCover;
+
+    /**
+     * This list shows our contents. It can be ListView or GridView, and we toggle between them
+     * using the transition framework.
+     */
+    private AbsListView mAbsListView;
+
+    /**
+     * This is our contents.
+     */
+    private MeatAdapter mAdapter;
+
+    public static AdapterTransitionFragment newInstance() {
+        return new AdapterTransitionFragment();
+    }
+
+    public AdapterTransitionFragment() {
+    }
+
+    @Override
+    public void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setHasOptionsMenu(true);
+    }
+
+    @Override
+    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
+        // We use a ListView at first
+        mAbsListView = (AbsListView) inflater.inflate(R.layout.fragment_meat_list, container, false);
+        mAdapter = new MeatAdapter(inflater, R.layout.item_meat_list);
+        return inflater.inflate(R.layout.fragment_adapter_transition, container, false);
+    }
+
+    @Override
+    public void onViewCreated(View view, Bundle savedInstanceState) {
+        // Retaining references for FrameLayouts that we use later.
+        mContent = (FrameLayout) view.findViewById(R.id.content);
+        mCover = (FrameLayout) view.findViewById(R.id.cover);
+        // We are attaching the list to the screen here.
+        mAbsListView.setAdapter(mAdapter);
+        mContent.addView(mAbsListView);
+    }
+
+    @Override
+    public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
+        inflater.inflate(R.menu.fragment_adapter_transition, menu);
+    }
+
+    @Override
+    public void onPrepareOptionsMenu(Menu menu) {
+        // We change the look of the icon every time the user toggles between list and grid.
+        MenuItem item = menu.findItem(R.id.action_toggle);
+        if (null != item) {
+            if (mAbsListView instanceof ListView) {
+                item.setIcon(R.drawable.ic_action_grid);
+            } else {
+                item.setIcon(R.drawable.ic_action_list);
+            }
+        }
+    }
+
+    @Override
+    public boolean onOptionsItemSelected(MenuItem item) {
+        switch (item.getItemId()) {
+            case R.id.action_toggle: {
+                toggle();
+                return true;
+            }
+        }
+        return false;
+    }
+
+    @Override
+    public void onTransitionStart(Transition transition) {
+    }
+
+    // BEGIN_INCLUDE(on_transition_end)
+    @Override
+    public void onTransitionEnd(Transition transition) {
+        // When the transition ends, we remove all the views from the overlay and hide it.
+        mCover.removeAllViews();
+        mCover.setVisibility(View.INVISIBLE);
+    }
+    // END_INCLUDE(on_transition_end)
+
+    @Override
+    public void onTransitionCancel(Transition transition) {
+    }
+
+    @Override
+    public void onTransitionPause(Transition transition) {
+    }
+
+    @Override
+    public void onTransitionResume(Transition transition) {
+    }
+
+    /**
+     * Toggle the UI between ListView and GridView.
+     */
+    private void toggle() {
+        // We use mCover as the overlay on which we carry out the transition.
+        mCover.setVisibility(View.VISIBLE);
+        // This FrameLayout holds all the visible views in the current list or grid. We use this as
+        // the starting Scene of the Transition later.
+        FrameLayout before = copyVisibleViews();
+        FrameLayout.LayoutParams params = new FrameLayout.LayoutParams(
+                FrameLayout.LayoutParams.MATCH_PARENT, FrameLayout.LayoutParams.MATCH_PARENT);
+        mCover.addView(before, params);
+        // Swap the actual list.
+        swapAbsListView();
+        // We also swap the icon for the toggle button.
+        ActivityCompat.invalidateOptionsMenu(getActivity());
+        // It is now ready to start the transition.
+        mAbsListView.post(new Runnable() {
+            @Override
+            public void run() {
+                // BEGIN_INCLUDE(transition_with_listener)
+                Scene scene = new Scene(mCover, copyVisibleViews());
+                Transition transition = new AutoTransition();
+                transition.addListener(AdapterTransitionFragment.this);
+                TransitionManager.go(scene, transition);
+                // END_INCLUDE(transition_with_listener)
+            }
+        });
+    }
+
+    /**
+     * Swap ListView with GridView, or GridView with ListView.
+     */
+    private void swapAbsListView() {
+        // We save the current scrolling position before removing the current list.
+        int first = mAbsListView.getFirstVisiblePosition();
+        // If the current list is a GridView, we replace it with a ListView. If it is a ListView,
+        // a GridView.
+        LayoutInflater inflater = LayoutInflater.from(getActivity());
+        if (mAbsListView instanceof GridView) {
+            mAbsListView = (AbsListView) inflater.inflate(
+                    R.layout.fragment_meat_list, (ViewGroup) mAbsListView.getParent(), false);
+            mAdapter = new MeatAdapter(inflater, R.layout.item_meat_list);
+        } else {
+            mAbsListView = (AbsListView) inflater.inflate(
+                    R.layout.fragment_meat_grid, (ViewGroup) mAbsListView.getParent(), false);
+            mAdapter = new MeatAdapter(inflater, R.layout.item_meat_grid);
+        }
+        mAbsListView.setAdapter(mAdapter);
+        // We restore the scrolling position here.
+        mAbsListView.setSelection(first);
+        // The new list is ready, and we replace the existing one with it.
+        mContent.removeAllViews();
+        mContent.addView(mAbsListView);
+    }
+
+    /**
+     * Copy all the visible views in the mAbsListView into a new FrameLayout and return it.
+     *
+     * @return a FrameLayout with all the visible views inside.
+     */
+    private FrameLayout copyVisibleViews() {
+        // This is the FrameLayout we return afterwards.
+        FrameLayout layout = new FrameLayout(getActivity());
+        // The transition framework requires to set ID for all views to be animated.
+        layout.setId(ROOT_ID);
+        // We only copy visible views.
+        int first = mAbsListView.getFirstVisiblePosition();
+        int index = 0;
+        while (true) {
+            // This is one of the views that we copy. Note that the argument for getChildAt is a
+            // zero-oriented index, and it doesn't usually match with its position in the list.
+            View source = mAbsListView.getChildAt(index);
+            if (null == source) {
+                break;
+            }
+            // This is the copy of the original view.
+            View destination = mAdapter.getView(first + index, null, layout);
+            assert destination != null;
+            destination.setId(ROOT_ID + first + index);
+            FrameLayout.LayoutParams params = new FrameLayout.LayoutParams(
+                    source.getWidth(), source.getHeight());
+            params.leftMargin = (int) source.getX();
+            params.topMargin = (int) source.getY();
+            layout.addView(destination, params);
+            ++index;
+        }
+        return layout;
+    }
+
+}
diff --git a/ui/transition/AdapterTransition/AdapterTransitionSample/src/main/java/com/example/android/adaptertransition/Meat.java b/ui/transition/AdapterTransition/AdapterTransitionSample/src/main/java/com/example/android/adaptertransition/Meat.java
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--- /dev/null
+++ b/ui/transition/AdapterTransition/AdapterTransitionSample/src/main/java/com/example/android/adaptertransition/Meat.java
@@ -0,0 +1,46 @@
+/*
+ * Copyright 2014 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.example.android.adaptertransition;
+
+/**
+ * Sample data.
+ */
+public class Meat {
+
+    public int resourceId;
+    public String title;
+
+    public Meat(int resourceId, String title) {
+        this.resourceId = resourceId;
+        this.title = title;
+    }
+
+    public static final Meat[] MEATS = {
+            new Meat(R.drawable.p1, "First"),
+            new Meat(R.drawable.p2, "Second"),
+            new Meat(R.drawable.p3, "Third"),
+            new Meat(R.drawable.p4, "Fourth"),
+            new Meat(R.drawable.p5, "Fifth"),
+            new Meat(R.drawable.p6, "Sixth"),
+            new Meat(R.drawable.p7, "Seventh"),
+            new Meat(R.drawable.p8, "Eighth"),
+            new Meat(R.drawable.p9, "Ninth"),
+            new Meat(R.drawable.p10, "Tenth"),
+            new Meat(R.drawable.p11, "Eleventh"),
+    };
+
+}
diff --git a/ui/transition/AdapterTransition/AdapterTransitionSample/src/main/java/com/example/android/adaptertransition/MeatAdapter.java b/ui/transition/AdapterTransition/AdapterTransitionSample/src/main/java/com/example/android/adaptertransition/MeatAdapter.java
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--- /dev/null
+++ b/ui/transition/AdapterTransition/AdapterTransitionSample/src/main/java/com/example/android/adaptertransition/MeatAdapter.java
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+/*
+ * Copyright 2014 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.example.android.adaptertransition;
+
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.ViewGroup;
+import android.widget.BaseAdapter;
+import android.widget.ImageView;
+import android.widget.TextView;
+
+/**
+ * This class provides data as Views. It is designed to support both ListView and GridView by
+ * changing a layout resource file to inflate.
+ */
+public class MeatAdapter extends BaseAdapter {
+
+    private final LayoutInflater mLayoutInflater;
+    private final int mResourceId;
+
+    /**
+     * Create a new instance of {@link MeatAdapter}.
+     *
+     * @param inflater   The layout inflater.
+     * @param resourceId The resource ID for the layout to be used. The layout should contain an
+     *                   ImageView with ID of "meat_image" and a TextView with ID of "meat_title".
+     */
+    public MeatAdapter(LayoutInflater inflater, int resourceId) {
+        mLayoutInflater = inflater;
+        mResourceId = resourceId;
+    }
+
+    @Override
+    public int getCount() {
+        return Meat.MEATS.length;
+    }
+
+    @Override
+    public Meat getItem(int position) {
+        return Meat.MEATS[position];
+    }
+
+    @Override
+    public long getItemId(int position) {
+        return Meat.MEATS[position].resourceId;
+    }
+
+    @Override
+    public View getView(int position, View convertView, ViewGroup parent) {
+        final View view;
+        final ViewHolder holder;
+        if (null == convertView) {
+            view = mLayoutInflater.inflate(mResourceId, parent, false);
+            holder = new ViewHolder();
+            assert view != null;
+            holder.image = (ImageView) view.findViewById(R.id.meat_image);
+            holder.title = (TextView) view.findViewById(R.id.meat_title);
+            view.setTag(holder);
+        } else {
+            view = convertView;
+            holder = (ViewHolder) view.getTag();
+        }
+        Meat meat = getItem(position);
+        holder.image.setImageResource(meat.resourceId);
+        holder.title.setText(meat.title);
+        return view;
+    }
+
+    private static class ViewHolder {
+        public ImageView image;
+        public TextView title;
+    }
+
+}
diff --git a/ui/transition/AdapterTransition/AdapterTransitionSample/src/main/res/drawable-hdpi/ic_action_grid.png b/ui/transition/AdapterTransition/AdapterTransitionSample/src/main/res/drawable-hdpi/ic_action_grid.png
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diff --git a/ui/transition/AdapterTransition/AdapterTransitionSample/src/main/res/drawable-hdpi/ic_action_list.png b/ui/transition/AdapterTransition/AdapterTransitionSample/src/main/res/drawable-hdpi/ic_action_list.png
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diff --git a/ui/transition/AdapterTransition/AdapterTransitionSample/src/main/res/drawable-hdpi/ic_launcher.png b/ui/transition/AdapterTransition/AdapterTransitionSample/src/main/res/drawable-hdpi/ic_launcher.png
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diff --git a/ui/transition/AdapterTransition/AdapterTransitionSample/src/main/res/drawable-mdpi/ic_action_grid.png b/ui/transition/AdapterTransition/AdapterTransitionSample/src/main/res/drawable-mdpi/ic_action_grid.png
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diff --git a/ui/transition/AdapterTransition/AdapterTransitionSample/src/main/res/drawable-mdpi/ic_launcher.png b/ui/transition/AdapterTransition/AdapterTransitionSample/src/main/res/drawable-mdpi/ic_launcher.png
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diff --git a/ui/transition/AdapterTransition/AdapterTransitionSample/src/main/res/drawable-nodpi/p1.jpg b/ui/transition/AdapterTransition/AdapterTransitionSample/src/main/res/drawable-nodpi/p1.jpg
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Binary files differ
diff --git a/ui/transition/AdapterTransition/AdapterTransitionSample/src/main/res/layout/fragment_adapter_transition.xml b/ui/transition/AdapterTransition/AdapterTransitionSample/src/main/res/layout/fragment_adapter_transition.xml
new file mode 100644
index 0000000..22ec090
--- /dev/null
+++ b/ui/transition/AdapterTransition/AdapterTransitionSample/src/main/res/layout/fragment_adapter_transition.xml
@@ -0,0 +1,36 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+Copyright 2014 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.
+-->
+<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:orientation="vertical"
+    tools:context="com.example.android.adaptertransition.AdapterTransitionFragment">
+
+    <FrameLayout
+        android:id="@+id/content"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"/>
+
+    <FrameLayout
+        android:id="@+id/cover"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        android:background="#f3f3f3"
+        android:visibility="invisible"/>
+
+</FrameLayout>
diff --git a/ui/transition/AdapterTransition/AdapterTransitionSample/src/main/res/layout/fragment_meat_grid.xml b/ui/transition/AdapterTransition/AdapterTransitionSample/src/main/res/layout/fragment_meat_grid.xml
new file mode 100644
index 0000000..9a4f7a1
--- /dev/null
+++ b/ui/transition/AdapterTransition/AdapterTransitionSample/src/main/res/layout/fragment_meat_grid.xml
@@ -0,0 +1,29 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+Copyright 2014 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.
+-->
+<GridView
+    android:id="@+id/abs_list_view"
+    xmlns:android="http://schemas.android.com/apk/res/android"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:clipToPadding="false"
+    android:columnWidth="150dp"
+    android:horizontalSpacing="1dp"
+    android:numColumns="auto_fit"
+    android:padding="1dp"
+    android:scrollbars="none"
+    android:stretchMode="columnWidth"
+    android:verticalSpacing="1dp"/>
diff --git a/ui/transition/AdapterTransition/AdapterTransitionSample/src/main/res/layout/fragment_meat_list.xml b/ui/transition/AdapterTransition/AdapterTransitionSample/src/main/res/layout/fragment_meat_list.xml
new file mode 100644
index 0000000..4523b26
--- /dev/null
+++ b/ui/transition/AdapterTransition/AdapterTransitionSample/src/main/res/layout/fragment_meat_list.xml
@@ -0,0 +1,21 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+Copyright 2014 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.
+-->
+<ListView
+    android:id="@+id/abs_list_view"
+    xmlns:android="http://schemas.android.com/apk/res/android"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"/>
diff --git a/ui/transition/AdapterTransition/AdapterTransitionSample/src/main/res/layout/item_meat_grid.xml b/ui/transition/AdapterTransition/AdapterTransitionSample/src/main/res/layout/item_meat_grid.xml
new file mode 100644
index 0000000..d7fb77a
--- /dev/null
+++ b/ui/transition/AdapterTransition/AdapterTransitionSample/src/main/res/layout/item_meat_grid.xml
@@ -0,0 +1,50 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+Copyright 2014 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.
+-->
+<RelativeLayout
+    android:id="@+id/meat_container"
+    xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:layout_width="match_parent"
+    android:layout_height="150dp">
+
+    <ImageView
+        android:id="@+id/meat_image"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        android:scaleType="centerCrop"
+        tools:src="@drawable/p1"/>
+
+    <TextView
+        android:id="@+id/meat_title"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_alignParentBottom="true"
+        android:layout_alignParentEnd="true"
+        android:layout_gravity="bottom|end"
+        android:layout_marginEnd="16dp"
+        android:layout_marginStart="16dp"
+        android:gravity="center_horizontal"
+        android:shadowColor="#000000"
+        android:shadowDx="0"
+        android:shadowDy="0"
+        android:shadowRadius="10"
+        android:textColor="#ffffff"
+        android:textSize="24sp"
+        android:textStyle="bold"
+        tools:text="Hello"/>
+
+</RelativeLayout>
\ No newline at end of file
diff --git a/ui/transition/AdapterTransition/AdapterTransitionSample/src/main/res/layout/item_meat_list.xml b/ui/transition/AdapterTransition/AdapterTransitionSample/src/main/res/layout/item_meat_list.xml
new file mode 100644
index 0000000..8d75b90
--- /dev/null
+++ b/ui/transition/AdapterTransition/AdapterTransitionSample/src/main/res/layout/item_meat_list.xml
@@ -0,0 +1,46 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+Copyright 2014 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.
+-->
+<RelativeLayout
+    android:id="@+id/meat_container"
+    xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:orientation="horizontal"
+    android:paddingEnd="?android:attr/listPreferredItemPaddingEnd"
+    android:paddingStart="?android:attr/listPreferredItemPaddingStart">
+
+    <ImageView
+        android:id="@+id/meat_image"
+        android:layout_width="64dp"
+        android:layout_height="64dp"
+        android:scaleType="centerCrop"
+        tools:src="@drawable/p1"/>
+
+    <TextView
+        android:id="@+id/meat_title"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_centerVertical="true"
+        android:layout_marginStart="?android:attr/listPreferredItemPaddingStart"
+        android:layout_toEndOf="@id/meat_image"
+        android:layout_centerInParent="true"
+        android:gravity="center_vertical"
+        android:textSize="24sp"
+        tools:text="Title"/>
+
+</RelativeLayout>
\ No newline at end of file
diff --git a/ui/transition/AdapterTransition/AdapterTransitionSample/src/main/res/menu/fragment_adapter_transition.xml b/ui/transition/AdapterTransition/AdapterTransitionSample/src/main/res/menu/fragment_adapter_transition.xml
new file mode 100644
index 0000000..2a51b11
--- /dev/null
+++ b/ui/transition/AdapterTransition/AdapterTransitionSample/src/main/res/menu/fragment_adapter_transition.xml
@@ -0,0 +1,23 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+Copyright 2014 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.
+-->
+<menu xmlns:android="http://schemas.android.com/apk/res/android">
+    <item
+        android:id="@+id/action_toggle"
+        android:icon="@drawable/ic_action_grid"
+        android:showAsAction="always"
+        android:title="Toggle view"/>
+</menu>
diff --git a/ui/transition/AdapterTransition/AdapterTransitionSample/src/main/res/values-w820dp/dimens.xml b/ui/transition/AdapterTransition/AdapterTransitionSample/src/main/res/values-w820dp/dimens.xml
new file mode 100644
index 0000000..63fc816
--- /dev/null
+++ b/ui/transition/AdapterTransition/AdapterTransitionSample/src/main/res/values-w820dp/dimens.xml
@@ -0,0 +1,6 @@
+<resources>
+    <!-- Example customization of dimensions originally defined in res/values/dimens.xml
+         (such as screen margins) for screens with more than 820dp of available width. This
+         would include 7" and 10" devices in landscape (~960dp and ~1280dp respectively). -->
+    <dimen name="activity_horizontal_margin">64dp</dimen>
+</resources>
diff --git a/ui/transition/AdapterTransition/AdapterTransitionSample/src/main/res/values/dimens.xml b/ui/transition/AdapterTransition/AdapterTransitionSample/src/main/res/values/dimens.xml
new file mode 100644
index 0000000..a0171a7
--- /dev/null
+++ b/ui/transition/AdapterTransition/AdapterTransitionSample/src/main/res/values/dimens.xml
@@ -0,0 +1,6 @@
+<resources>
+    <!-- Default screen margins, per the Android Design guidelines. -->
+    <dimen name="activity_horizontal_margin">16dp</dimen>
+    <dimen name="activity_vertical_margin">16dp</dimen>
+
+    </resources>
diff --git a/ui/transition/AdapterTransition/build.gradle b/ui/transition/AdapterTransition/build.gradle
new file mode 100644
index 0000000..cca9ac3
--- /dev/null
+++ b/ui/transition/AdapterTransition/build.gradle
@@ -0,0 +1,10 @@
+// BEGIN_EXCLUDE
+import com.example.android.samples.build.SampleGenPlugin
+apply plugin: SampleGenPlugin
+
+samplegen {
+  pathToBuild "../../../../../build"
+  pathToSamplesCommon "../../../common"
+}
+apply from: "../../../../../build/build.gradle"
+// END_EXCLUDE
diff --git a/ui/transition/AdapterTransition/buildSrc/build.gradle b/ui/transition/AdapterTransition/buildSrc/build.gradle
new file mode 100644
index 0000000..e344a8c
--- /dev/null
+++ b/ui/transition/AdapterTransition/buildSrc/build.gradle
@@ -0,0 +1,18 @@
+
+
+
+repositories {
+    mavenCentral()
+}
+dependencies {
+    compile 'org.freemarker:freemarker:2.3.20'
+}
+
+sourceSets {
+    main {
+        groovy {
+            srcDir new File(rootDir, "../../../../../../build/buildSrc/src/main/groovy")
+        }
+    }
+}
+
diff --git a/ui/transition/AdapterTransition/gradle/wrapper/gradle-wrapper.jar b/ui/transition/AdapterTransition/gradle/wrapper/gradle-wrapper.jar
new file mode 100644
index 0000000..8c0fb64
--- /dev/null
+++ b/ui/transition/AdapterTransition/gradle/wrapper/gradle-wrapper.jar
Binary files differ
diff --git a/ui/transition/AdapterTransition/gradle/wrapper/gradle-wrapper.properties b/ui/transition/AdapterTransition/gradle/wrapper/gradle-wrapper.properties
new file mode 100644
index 0000000..4f5d419
--- /dev/null
+++ b/ui/transition/AdapterTransition/gradle/wrapper/gradle-wrapper.properties
@@ -0,0 +1,6 @@
+#Wed Apr 10 15:27:10 PDT 2013
+distributionBase=GRADLE_USER_HOME
+distributionPath=wrapper/dists
+zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists
+distributionUrl=http://services.gradle.org/distributions/gradle-1.10-bin.zip
diff --git a/ui/transition/AdapterTransition/gradlew b/ui/transition/AdapterTransition/gradlew
new file mode 100755
index 0000000..91a7e26
--- /dev/null
+++ b/ui/transition/AdapterTransition/gradlew
@@ -0,0 +1,164 @@
+#!/usr/bin/env bash
+
+##############################################################################
+##
+##  Gradle start up script for UN*X
+##
+##############################################################################
+
+# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+DEFAULT_JVM_OPTS=""
+
+APP_NAME="Gradle"
+APP_BASE_NAME=`basename "$0"`
+
+# Use the maximum available, or set MAX_FD != -1 to use that value.
+MAX_FD="maximum"
+
+warn ( ) {
+    echo "$*"
+}
+
+die ( ) {
+    echo
+    echo "$*"
+    echo
+    exit 1
+}
+
+# OS specific support (must be 'true' or 'false').
+cygwin=false
+msys=false
+darwin=false
+case "`uname`" in
+  CYGWIN* )
+    cygwin=true
+    ;;
+  Darwin* )
+    darwin=true
+    ;;
+  MINGW* )
+    msys=true
+    ;;
+esac
+
+# For Cygwin, ensure paths are in UNIX format before anything is touched.
+if $cygwin ; then
+    [ -n "$JAVA_HOME" ] && JAVA_HOME=`cygpath --unix "$JAVA_HOME"`
+fi
+
+# Attempt to set APP_HOME
+# Resolve links: $0 may be a link
+PRG="$0"
+# Need this for relative symlinks.
+while [ -h "$PRG" ] ; do
+    ls=`ls -ld "$PRG"`
+    link=`expr "$ls" : '.*-> \(.*\)$'`
+    if expr "$link" : '/.*' > /dev/null; then
+        PRG="$link"
+    else
+        PRG=`dirname "$PRG"`"/$link"
+    fi
+done
+SAVED="`pwd`"
+cd "`dirname \"$PRG\"`/" >&-
+APP_HOME="`pwd -P`"
+cd "$SAVED" >&-
+
+CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar
+
+# Determine the Java command to use to start the JVM.
+if [ -n "$JAVA_HOME" ] ; then
+    if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
+        # IBM's JDK on AIX uses strange locations for the executables
+        JAVACMD="$JAVA_HOME/jre/sh/java"
+    else
+        JAVACMD="$JAVA_HOME/bin/java"
+    fi
+    if [ ! -x "$JAVACMD" ] ; then
+        die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+    fi
+else
+    JAVACMD="java"
+    which java >/dev/null 2>&1 || die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+fi
+
+# Increase the maximum file descriptors if we can.
+if [ "$cygwin" = "false" -a "$darwin" = "false" ] ; then
+    MAX_FD_LIMIT=`ulimit -H -n`
+    if [ $? -eq 0 ] ; then
+        if [ "$MAX_FD" = "maximum" -o "$MAX_FD" = "max" ] ; then
+            MAX_FD="$MAX_FD_LIMIT"
+        fi
+        ulimit -n $MAX_FD
+        if [ $? -ne 0 ] ; then
+            warn "Could not set maximum file descriptor limit: $MAX_FD"
+        fi
+    else
+        warn "Could not query maximum file descriptor limit: $MAX_FD_LIMIT"
+    fi
+fi
+
+# For Darwin, add options to specify how the application appears in the dock
+if $darwin; then
+    GRADLE_OPTS="$GRADLE_OPTS \"-Xdock:name=$APP_NAME\" \"-Xdock:icon=$APP_HOME/media/gradle.icns\""
+fi
+
+# For Cygwin, switch paths to Windows format before running java
+if $cygwin ; then
+    APP_HOME=`cygpath --path --mixed "$APP_HOME"`
+    CLASSPATH=`cygpath --path --mixed "$CLASSPATH"`
+
+    # We build the pattern for arguments to be converted via cygpath
+    ROOTDIRSRAW=`find -L / -maxdepth 1 -mindepth 1 -type d 2>/dev/null`
+    SEP=""
+    for dir in $ROOTDIRSRAW ; do
+        ROOTDIRS="$ROOTDIRS$SEP$dir"
+        SEP="|"
+    done
+    OURCYGPATTERN="(^($ROOTDIRS))"
+    # Add a user-defined pattern to the cygpath arguments
+    if [ "$GRADLE_CYGPATTERN" != "" ] ; then
+        OURCYGPATTERN="$OURCYGPATTERN|($GRADLE_CYGPATTERN)"
+    fi
+    # Now convert the arguments - kludge to limit ourselves to /bin/sh
+    i=0
+    for arg in "$@" ; do
+        CHECK=`echo "$arg"|egrep -c "$OURCYGPATTERN" -`
+        CHECK2=`echo "$arg"|egrep -c "^-"`                                 ### Determine if an option
+
+        if [ $CHECK -ne 0 ] && [ $CHECK2 -eq 0 ] ; then                    ### Added a condition
+            eval `echo args$i`=`cygpath --path --ignore --mixed "$arg"`
+        else
+            eval `echo args$i`="\"$arg\""
+        fi
+        i=$((i+1))
+    done
+    case $i in
+        (0) set -- ;;
+        (1) set -- "$args0" ;;
+        (2) set -- "$args0" "$args1" ;;
+        (3) set -- "$args0" "$args1" "$args2" ;;
+        (4) set -- "$args0" "$args1" "$args2" "$args3" ;;
+        (5) set -- "$args0" "$args1" "$args2" "$args3" "$args4" ;;
+        (6) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" ;;
+        (7) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" ;;
+        (8) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" ;;
+        (9) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" "$args8" ;;
+    esac
+fi
+
+# Split up the JVM_OPTS And GRADLE_OPTS values into an array, following the shell quoting and substitution rules
+function splitJvmOpts() {
+    JVM_OPTS=("$@")
+}
+eval splitJvmOpts $DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS
+JVM_OPTS[${#JVM_OPTS[*]}]="-Dorg.gradle.appname=$APP_BASE_NAME"
+
+exec "$JAVACMD" "${JVM_OPTS[@]}" -classpath "$CLASSPATH" org.gradle.wrapper.GradleWrapperMain "$@"
diff --git a/ui/transition/AdapterTransition/gradlew.bat b/ui/transition/AdapterTransition/gradlew.bat
new file mode 100644
index 0000000..aec9973
--- /dev/null
+++ b/ui/transition/AdapterTransition/gradlew.bat
@@ -0,0 +1,90 @@
+@if "%DEBUG%" == "" @echo off

+@rem ##########################################################################

+@rem

+@rem  Gradle startup script for Windows

+@rem

+@rem ##########################################################################

+

+@rem Set local scope for the variables with windows NT shell

+if "%OS%"=="Windows_NT" setlocal

+

+@rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.

+set DEFAULT_JVM_OPTS=

+

+set DIRNAME=%~dp0

+if "%DIRNAME%" == "" set DIRNAME=.

+set APP_BASE_NAME=%~n0

+set APP_HOME=%DIRNAME%

+

+@rem Find java.exe

+if defined JAVA_HOME goto findJavaFromJavaHome

+

+set JAVA_EXE=java.exe

+%JAVA_EXE% -version >NUL 2>&1

+if "%ERRORLEVEL%" == "0" goto init

+

+echo.

+echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.

+echo.

+echo Please set the JAVA_HOME variable in your environment to match the

+echo location of your Java installation.

+

+goto fail

+

+:findJavaFromJavaHome

+set JAVA_HOME=%JAVA_HOME:"=%

+set JAVA_EXE=%JAVA_HOME%/bin/java.exe

+

+if exist "%JAVA_EXE%" goto init

+

+echo.

+echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME%

+echo.

+echo Please set the JAVA_HOME variable in your environment to match the

+echo location of your Java installation.

+

+goto fail

+

+:init

+@rem Get command-line arguments, handling Windowz variants

+

+if not "%OS%" == "Windows_NT" goto win9xME_args

+if "%@eval[2+2]" == "4" goto 4NT_args

+

+:win9xME_args

+@rem Slurp the command line arguments.

+set CMD_LINE_ARGS=

+set _SKIP=2

+

+:win9xME_args_slurp

+if "x%~1" == "x" goto execute

+

+set CMD_LINE_ARGS=%*

+goto execute

+

+:4NT_args

+@rem Get arguments from the 4NT Shell from JP Software

+set CMD_LINE_ARGS=%$

+

+:execute

+@rem Setup the command line

+

+set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar

+

+@rem Execute Gradle

+"%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %CMD_LINE_ARGS%

+

+:end

+@rem End local scope for the variables with windows NT shell

+if "%ERRORLEVEL%"=="0" goto mainEnd

+

+:fail

+rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of

+rem the _cmd.exe /c_ return code!

+if  not "" == "%GRADLE_EXIT_CONSOLE%" exit 1

+exit /b 1

+

+:mainEnd

+if "%OS%"=="Windows_NT" endlocal

+

+:omega

diff --git a/ui/transition/AdapterTransition/settings.gradle b/ui/transition/AdapterTransition/settings.gradle
new file mode 100644
index 0000000..3284a23
--- /dev/null
+++ b/ui/transition/AdapterTransition/settings.gradle
@@ -0,0 +1,4 @@
+
+
+
+include 'AdapterTransitionSample'
diff --git a/ui/transition/AdapterTransition/template-params.xml b/ui/transition/AdapterTransition/template-params.xml
new file mode 100644
index 0000000..d31b532
--- /dev/null
+++ b/ui/transition/AdapterTransition/template-params.xml
@@ -0,0 +1,43 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!--
+ Copyright 2013 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.
+-->
+
+
+
+<sample>
+    <name>AdapterTransition</name>
+    <group>UI</group>
+    <package>com.example.android.adaptertransition</package>
+
+    <!-- change minSdk if needed-->
+    <minSdk>19</minSdk>
+
+
+    <strings>
+        <intro>
+            <![CDATA[
+	    Transition cannot be directly applied to AdapterViews. In this sample, we demonstrate how to create a overlay layout and run a Transition on it.
+            ]]>
+        </intro>
+    </strings>
+
+    <template src="base"/>
+    <template src="FragmentView"/>
+    <common src="logger"/>
+    <common src="activities"/>
+    <common src="view"/>
+
+</sample>