SupportLeanbackDemo: activity transition

b/15024618

Change-Id: Ib23746360984f3bbe255e8f75df30c7422b553f2

samples/SupportLeanbackDemos/AndroidManifest.xml

@@ -12,7 +12,7 @@
         android:label="@string/app_name"
         android:icon="@drawable/ic_launcher"
         android:banner="@drawable/ic_launcher"
-        android:theme="@style/Theme.Leanback">
+        android:theme="@style/Theme.Example.Leanback">
 
         <activity android:name="MainActivity"
             android:label="@string/app_name">

samples/SupportLeanbackDemos/res/values/themes.xml

@@ -0,0 +1,13 @@
+<resources>
+    <style name="Theme.Example.Leanback" parent="Theme.Leanback">
+<!-- uncomment to override default transition settings:
+        <item name="android:windowEnterTransition">@android:transition/fade</item>
+        <item name="android:windowExitTransition">@android:transition/fade</item>
+        <item name="android:windowSharedElementExitTransition">@android:transition/move</item>
+        <item name="android:windowSharedElementEnterTransition">@android:transition/move</item>
+        <item name="android:windowAllowExitTransitionOverlap">true</item>
+        <item name="android:windowAllowEnterTransitionOverlap">false</item>
+        <item name="android:windowContentTransitions">true</item>
+ -->
+    </style>
+</resources>

samples/SupportLeanbackDemos/src/com/example/android/leanback/BrowseFragment.java

@@ -15,14 +15,19 @@ package com.example.android.leanback;
 
 import android.content.Intent;
 import android.os.Bundle;
+import android.support.v4.app.ActivityOptionsCompat;
 import android.support.v17.leanback.widget.ArrayObjectAdapter;
 import android.support.v17.leanback.widget.HeaderItem;
+import android.support.v17.leanback.widget.ImageCardView;
 import android.support.v17.leanback.widget.ListRow;
 import android.support.v17.leanback.widget.ListRowPresenter;
-import android.support.v17.leanback.widget.OnItemClickedListener;
+import android.support.v17.leanback.widget.OnItemViewClickedListener;
+import android.support.v17.leanback.widget.Presenter;
 import android.support.v17.leanback.widget.Row;
+import android.support.v17.leanback.widget.RowPresenter;
 import android.util.Log;
 import android.view.View;
+import android.view.ViewGroup;
 
 public class BrowseFragment extends android.support.v17.leanback.app.BrowseFragment {
     private static final String TAG = "leanback.BrowseFragment";
@@ -48,16 +53,13 @@ public class BrowseFragment extends android.support.v17.leanback.app.BrowseFragm
         });
 
         setupRows();
-        setOnItemClickedListener(new ItemClickedListener());
+        setOnItemViewClickedListener(new ItemViewClickedListener());
     }
 
     private void setupRows() {
         ListRowPresenter lrp = new ListRowPresenter();
-        float density = getActivity().getResources().getDisplayMetrics().density;
-        float height = 160 * density + 0.5f;
-        float expandedHeight = height + 52 * density + 0.5f;
-        lrp.setRowHeight((int)height);
-        lrp.setExpandedRowHeight((int)expandedHeight);
+        lrp.setRowHeight(CardPresenter.getRowHeight(getActivity()));
+        lrp.setExpandedRowHeight(CardPresenter.getExpandedRowHeight(getActivity()));
 
         mRowsAdapter = new ArrayObjectAdapter(lrp);
 
@@ -67,8 +69,14 @@ public class BrowseFragment extends android.support.v17.leanback.app.BrowseFragm
 
         for (int i = 0; i < NUM_ROWS; ++i) {
             ArrayObjectAdapter listRowAdapter = new ArrayObjectAdapter(cardPresenter);
-            listRowAdapter.add("Hello world");
-            listRowAdapter.add("This is a test");
+            listRowAdapter.add(new PhotoItem("Hello world", R.drawable.gallery_photo_1));
+            listRowAdapter.add(new PhotoItem("This is a test", R.drawable.gallery_photo_2));
+            listRowAdapter.add(new PhotoItem("Android TV", R.drawable.gallery_photo_3));
+            listRowAdapter.add(new PhotoItem("Leanback", R.drawable.gallery_photo_4));
+            listRowAdapter.add(new PhotoItem("Hello world", R.drawable.gallery_photo_5));
+            listRowAdapter.add(new PhotoItem("This is a test", R.drawable.gallery_photo_6));
+            listRowAdapter.add(new PhotoItem("Android TV", R.drawable.gallery_photo_7));
+            listRowAdapter.add(new PhotoItem("Leanback", R.drawable.gallery_photo_8));
             HeaderItem header = new HeaderItem(i, "Row " + i, null);
             mRowsAdapter.add(new ListRow(header, listRowAdapter));
         }
@@ -76,12 +84,18 @@ public class BrowseFragment extends android.support.v17.leanback.app.BrowseFragm
         setAdapter(mRowsAdapter);
     }
 
-    private final class ItemClickedListener implements OnItemClickedListener {
-        public void onItemClicked(Object item, Row row) {
-            // TODO: use a fragment transaction instead of launching a new
-            // activity
+    private final class ItemViewClickedListener implements OnItemViewClickedListener {
+        @Override
+        public void onItemClicked(Presenter.ViewHolder itemViewHolder, Object item,
+                RowPresenter.ViewHolder rowViewHolder, Row row) {
             Intent intent = new Intent(getActivity(), DetailsActivity.class);
-            startActivity(intent);
+            intent.putExtra(DetailsActivity.EXTRA_ITEM, (PhotoItem) item);
+
+            Bundle bundle = ActivityOptionsCompat.makeSceneTransitionAnimation(
+                    getActivity(),
+                    ((ImageCardView)itemViewHolder.view).getMainImageView(),
+                    DetailsActivity.SHARED_ELEMENT_NAME).toBundle();
+            getActivity().startActivity(intent, bundle);
         }
     }
 }

samples/SupportLeanbackDemos/src/com/example/android/leanback/CardPresenter.java

@@ -13,30 +13,71 @@
  */
 package com.example.android.leanback;
 
+import android.content.Context;
+import android.graphics.drawable.Drawable;
 import android.support.v17.leanback.widget.ImageCardView;
 import android.support.v17.leanback.widget.Presenter;
 import android.util.Log;
 import android.view.ViewGroup;
+import android.view.View.MeasureSpec;
+import android.view.ViewGroup.LayoutParams;
 import android.widget.TextView;
 
 public class CardPresenter extends Presenter {
     private static final String TAG = "CardPresenter";
 
+    private static final int IMAGE_HEIGHT_DP = 120;
+
+    private static int sRowHeight = 0;
+    private static int sExpandedRowHeight = 0;
+
+    private static void setupRowHeights(Context context) {
+        if (sRowHeight == 0) {
+            float density = context.getResources().getDisplayMetrics().density;
+            int height = (int) (IMAGE_HEIGHT_DP * density + 0.5f);
+
+            ImageCardView v = new ImageCardView(context);
+            v.setMainImageDimensions(LayoutParams.WRAP_CONTENT, height);
+            v.measure(MeasureSpec.UNSPECIFIED, MeasureSpec.UNSPECIFIED);
+            sRowHeight = v.getMeasuredHeight();
+            v.setActivated(true);
+            v.measure(MeasureSpec.UNSPECIFIED, MeasureSpec.UNSPECIFIED);
+            sExpandedRowHeight = v.getMeasuredHeight();
+        }
+    }
+
+    public static int getRowHeight(Context context) {
+        setupRowHeights(context);
+        return sRowHeight;
+    }
+
+    public static int getExpandedRowHeight(Context context) {
+        setupRowHeights(context);
+        return sExpandedRowHeight;
+    }
+
+    @Override
     public ViewHolder onCreateViewHolder(ViewGroup parent) {
         Log.d(TAG, "onCreateViewHolder");
         ImageCardView v = new ImageCardView(parent.getContext());
         v.setFocusable(true);
         v.setFocusableInTouchMode(true);
-        v.setMainImage(
-                parent.getContext().getResources().getDrawable(R.drawable.text_bg));
+        v.setMainImageAdjustViewBounds(true);
+        v.setMainImageDimensions(LayoutParams.WRAP_CONTENT, getRowHeight(parent.getContext()));
         return new ViewHolder(v);
     }
 
+    @Override
     public void onBindViewHolder(ViewHolder viewHolder, Object item) {
         Log.d(TAG, "onBindViewHolder for " + item.toString());
-        ((ImageCardView) viewHolder.view).setTitleText(item.toString());
+        PhotoItem photoItem = (PhotoItem) item;
+        Drawable drawable =  viewHolder.view.getContext().getResources()
+                .getDrawable(photoItem.getImageResourceId());
+        ((ImageCardView) viewHolder.view).setMainImage(drawable);
+        ((ImageCardView) viewHolder.view).setTitleText(photoItem.getTitle());
     }
 
+    @Override
     public void onUnbindViewHolder(ViewHolder viewHolder) {
         Log.d(TAG, "onUnbindViewHolder");
     }

samples/SupportLeanbackDemos/src/com/example/android/leanback/DetailsActivity.java

@@ -18,11 +18,17 @@ import android.os.Bundle;
 
 public class DetailsActivity extends Activity
 {
+    public static final String EXTRA_ITEM = "item";
+    public static final String SHARED_ELEMENT_NAME = "hero";
+
     /** Called when the activity is first created. */
     @Override
     public void onCreate(Bundle savedInstanceState)
     {
         super.onCreate(savedInstanceState);
         setContentView(R.layout.details);
+        ((DetailsFragment)getFragmentManager().findFragmentById(R.id.details_fragment))
+                .setItem((PhotoItem) getIntent().getParcelableExtra(EXTRA_ITEM));
     }
+
 }

samples/SupportLeanbackDemos/src/com/example/android/leanback/DetailsFragment.java

@@ -15,6 +15,8 @@ package com.example.android.leanback;
 
 import android.content.res.Resources;
 import android.os.Bundle;
+import android.support.v4.app.ActivityCompat;
+import android.support.v4.view.ViewCompat;
 import android.support.v17.leanback.widget.Action;
 import android.support.v17.leanback.widget.ArrayObjectAdapter;
 import android.support.v17.leanback.widget.ClassPresenterSelector;
@@ -24,24 +26,28 @@ import android.support.v17.leanback.widget.HeaderItem;
 import android.support.v17.leanback.widget.ListRow;
 import android.support.v17.leanback.widget.ListRowPresenter;
 import android.support.v17.leanback.widget.OnActionClickedListener;
+import android.support.v17.leanback.widget.RowPresenter;
 import android.util.Log;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.ViewGroup;
 import android.widget.Toast;
 
+import java.util.ArrayList;
+
 public class DetailsFragment extends android.support.v17.leanback.app.DetailsFragment {
     private static final String TAG = "leanback.BrowseFragment";
+    private static final String ITEM = "item";
 
     private static final int NUM_ROWS = 3;
     private ArrayObjectAdapter mRowsAdapter;
+    private PhotoItem mPhotoItem;
 
     @Override
     public void onCreate(Bundle savedInstanceState) {
         Log.i(TAG, "onCreate");
         super.onCreate(savedInstanceState);
 
-        setupRows();
-    }
-
-    private void setupRows() {
         ClassPresenterSelector ps = new ClassPresenterSelector();
         DetailsOverviewRowPresenter dorPresenter =
                 new DetailsOverviewRowPresenter(new DetailsDescriptionPresenter());
@@ -54,11 +60,30 @@ public class DetailsFragment extends android.support.v17.leanback.app.DetailsFra
         ps.addClassPresenter(DetailsOverviewRow.class, dorPresenter);
         ps.addClassPresenter(ListRow.class,
                 new ListRowPresenter());
+
         mRowsAdapter = new ArrayObjectAdapter(ps);
 
+        PhotoItem item = (PhotoItem) (savedInstanceState != null ?
+                savedInstanceState.getParcelable(ITEM) : null);
+        if (item != null) {
+            setItem(item);
+        }
+        dorPresenter.setSharedElementEnterTransition(getActivity(),
+                DetailsActivity.SHARED_ELEMENT_NAME);
+    }
+
+    @Override
+    public void onSaveInstanceState(Bundle outState) {
+        super.onSaveInstanceState(outState);
+        outState.putParcelable(ITEM, mPhotoItem);
+    }
+
+    public void setItem(PhotoItem photoItem) {
+        mPhotoItem = photoItem;
+
         Resources res = getActivity().getResources();
         DetailsOverviewRow dor = new DetailsOverviewRow("Details Overview");
-        dor.setImageDrawable(res.getDrawable(R.drawable.details_img));
+        dor.setImageDrawable(res.getDrawable(photoItem.getImageResourceId()));
         dor.addAction(new Action(1, "Buy $9.99"));
         dor.addAction(new Action(2, "Rent", "$3.99", res.getDrawable(R.drawable.ic_action_a)));
         mRowsAdapter.add(dor);

samples/SupportLeanbackDemos/src/com/example/android/leanback/PhotoItem.java

@@ -0,0 +1,70 @@
+/*
+ * Copyright (C) 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.leanback;
+
+import android.os.Parcel;
+import android.os.Parcelable;
+
+public class PhotoItem implements Parcelable {
+
+    private String mTitle;
+    private int mImageResourceId;
+
+    public PhotoItem(String title, int imageResourceId) {
+        mTitle = title;
+        mImageResourceId = imageResourceId;
+    }
+
+    public int getImageResourceId() {
+        return mImageResourceId;
+    }
+
+    public String getTitle() {
+        return mTitle;
+    }
+
+    @Override
+    public String toString() {
+        return mTitle;
+    }
+
+    @Override
+    public int describeContents() {
+        return 0;
+    }
+
+    @Override
+    public void writeToParcel(Parcel dest, int flags) {
+        dest.writeString(mTitle);
+        dest.writeInt(mImageResourceId);
+    }
+
+    public static final Parcelable.Creator<PhotoItem> CREATOR
+            = new Parcelable.Creator<PhotoItem>() {
+        @Override
+        public PhotoItem createFromParcel(Parcel in) {
+            return new PhotoItem(in);
+        }
+
+        @Override
+        public PhotoItem[] newArray(int size) {
+            return new PhotoItem[size];
+        }
+    };
+
+    private PhotoItem(Parcel in) {
+        mTitle = in.readString();
+        mImageResourceId = in.readInt();
+    }
+}