Add usage of BottomSheetBehavior with Fragment

Bug: 26507828
Change-Id: I62bb8db4bb6b1c7b8a908ecc88d603347839301a

samples/SupportDesignDemos/AndroidManifest.xml

@@ -253,6 +253,15 @@
             </intent-filter>
         </activity>
 
+        <activity android:name=".widget.BottomSheetWithFragment"
+                  android:label="@string/design_bottomsheet_with_fragment"
+                  android:theme="@style/Theme.Design">
+            <intent-filter>
+                <action android:name="android.intent.action.MAIN" />
+                <category android:name="com.example.android.support.design.SAMPLE_CODE" />
+            </intent-filter>
+        </activity>
+
         <activity android:name=".widget.BottomSheetModal"
                   android:label="@string/design_bottomsheet_modal"
                   android:theme="@style/Theme.BottomSheetModal">

samples/SupportDesignDemos/res/layout/design_bottom_sheet_fragment.xml

@@ -0,0 +1,36 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+     Copyright (C) 2016 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.
+-->
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+              android:orientation="vertical"
+              android:layout_width="match_parent"
+              android:layout_height="match_parent"
+              android:background="#ccc">
+
+    <TextView
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:text="@string/bottomsheet_with_fragment"
+            android:padding="16dp"
+            style="@style/TextAppearance.AppCompat.Headline"/>
+
+    <android.support.v7.widget.RecyclerView
+            android:id="@+id/list2"
+            android:layout_width="match_parent"
+            android:layout_height="0dp"
+            android:layout_weight="1"/>
+
+</LinearLayout>

samples/SupportDesignDemos/res/layout/design_bottom_sheet_with_fragment.xml

@@ -0,0 +1,52 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+     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.
+-->
+<android.support.design.widget.CoordinatorLayout
+        xmlns:android="http://schemas.android.com/apk/res/android"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        xmlns:app="http://schemas.android.com/apk/res-auto">
+
+    <LinearLayout
+            android:layout_width="match_parent"
+            android:layout_height="match_parent"
+            android:layout_marginBottom="@dimen/bottom_sheet_peek_height"
+            android:orientation="vertical">
+
+        <TextView
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:text="@string/bottomsheet_with_fragment"
+                android:padding="16dp"
+                style="@style/TextAppearance.AppCompat.Headline"/>
+
+        <android.support.v7.widget.RecyclerView
+                android:id="@+id/list1"
+                android:layout_width="match_parent"
+                android:layout_height="0dp"
+                android:layout_weight="1"/>
+
+    </LinearLayout>
+
+    <fragment
+            android:id="@+id/bottom_sheet"
+            class="com.example.android.support.design.widget.BottomSheetWithFragment$BottomSheetFragment"
+            android:layout_width="match_parent"
+            android:layout_height="match_parent"
+            app:layout_behavior="@string/bottom_sheet_behavior"
+            app:behavior_peekHeight="@dimen/bottom_sheet_peek_height"/>
+
+</android.support.design.widget.CoordinatorLayout>

samples/SupportDesignDemos/res/values/strings.xml

@@ -26,6 +26,7 @@
     <string name="design_bottomsheet_persistent">BottomSheet/Persistent</string>
     <string name="design_bottomsheet_hideable">BottomSheet/Hideable</string>
     <string name="design_bottomsheet_scroll">BottomSheet/With ScrollView in background</string>
+    <string name="design_bottomsheet_with_fragment">BottomSheet/With Fragment</string>
     <string name="design_bottomsheet_modal">BottomSheet/Modal</string>
 
     <string name="fab_size_normal">Normal size</string>
@@ -94,8 +95,10 @@
     <string name="bottomsheet_persistent">Persistent</string>
     <string name="bottomsheet_hideable">Hideable</string>
     <string name="bottomsheet_scroll">With ScrollView</string>
+    <string name="bottomsheet_with_fragment">With Fragment</string>
     <string name="bottomsheet_modal">Modal</string>
     <string name="bottomsheet_hide">Hide</string>
     <string name="bottomsheet_show">Show</string>
+    <string name="item_n">Item %d</string>
 
 </resources>

samples/SupportDesignDemos/src/com/example/android/support/design/widget/BottomSheetWithFragment.java

@@ -0,0 +1,116 @@
+/*
+ * Copyright (C) 2016 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.support.design.widget;
+
+import com.example.android.support.design.R;
+
+import android.content.Context;
+import android.os.Bundle;
+import android.support.annotation.Nullable;
+import android.support.design.widget.BottomSheetBehavior;
+import android.support.v4.app.Fragment;
+import android.support.v7.app.AppCompatActivity;
+import android.support.v7.widget.LinearLayoutManager;
+import android.support.v7.widget.RecyclerView;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.ViewGroup;
+import android.widget.TextView;
+
+/**
+ * This demonstrates basic usage of {@link BottomSheetBehavior} with Fragment.
+ */
+public class BottomSheetWithFragment extends AppCompatActivity {
+
+    private BottomSheetBehavior mBottomSheetBehavior;
+
+    @Override
+    protected void onCreate(@Nullable Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.design_bottom_sheet_with_fragment);
+        setUpRecyclerView((RecyclerView) findViewById(R.id.list1));
+        mBottomSheetBehavior = BottomSheetBehavior.from(findViewById(R.id.bottom_sheet));
+    }
+
+    @Override
+    public void onBackPressed() {
+        if (mBottomSheetBehavior.getState() == BottomSheetBehavior.STATE_EXPANDED) {
+            mBottomSheetBehavior.setState(BottomSheetBehavior.STATE_COLLAPSED);
+        } else {
+            super.onBackPressed();
+        }
+    }
+
+    private static void setUpRecyclerView(RecyclerView recyclerView) {
+        Context context = recyclerView.getContext();
+        recyclerView.setLayoutManager(new LinearLayoutManager(context));
+        recyclerView.setAdapter(new DummyAdapter(context, 30));
+    }
+
+    public static class BottomSheetFragment extends Fragment {
+
+        @Nullable
+        @Override
+        public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container,
+                @Nullable Bundle savedInstanceState) {
+            return inflater.inflate(R.layout.design_bottom_sheet_fragment, container, false);
+        }
+
+        @Override
+        public void onViewCreated(View view, @Nullable Bundle savedInstanceState) {
+            setUpRecyclerView((RecyclerView) view.findViewById(R.id.list2));
+        }
+    }
+
+    public static class ViewHolder extends RecyclerView.ViewHolder {
+
+        public TextView text;
+
+        public ViewHolder(LayoutInflater inflater, ViewGroup parent) {
+            super(inflater.inflate(android.R.layout.simple_list_item_1, parent, false));
+            text = (TextView) itemView.findViewById(android.R.id.text1);
+        }
+    }
+
+    public static class DummyAdapter extends RecyclerView.Adapter<ViewHolder> {
+
+        private final Context mContext;
+
+        private final int mItemCount;
+
+        public DummyAdapter(Context context, int itemCount) {
+            mContext = context;
+            mItemCount = itemCount;
+        }
+
+        @Override
+        public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
+            return new ViewHolder(LayoutInflater.from(mContext), parent);
+        }
+
+        @Override
+        public void onBindViewHolder(ViewHolder holder, int position) {
+            holder.text.setText(mContext.getString(R.string.item_n, position + 1));
+        }
+
+        @Override
+        public int getItemCount() {
+            return mItemCount;
+        }
+    }
+
+}