Add usage of BottomSheetBehavior

Change-Id: Ia6a6098c9a2ab7bcda0cc29c6800494faa97b440
diff --git a/samples/SupportDesignDemos/AndroidManifest.xml b/samples/SupportDesignDemos/AndroidManifest.xml
index ac7a033..1c99d49 100644
--- a/samples/SupportDesignDemos/AndroidManifest.xml
+++ b/samples/SupportDesignDemos/AndroidManifest.xml
@@ -190,5 +190,14 @@
             </intent-filter>
         </activity>
 
+        <activity android:name=".widget.BottomSheetUsage"
+                  android:label="@string/design_bottomsheet"
+                  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>
+
     </application>
 </manifest>
diff --git a/samples/SupportDesignDemos/res/layout/design_bottom_sheet.xml b/samples/SupportDesignDemos/res/layout/design_bottom_sheet.xml
new file mode 100644
index 0000000..56197ea
--- /dev/null
+++ b/samples/SupportDesignDemos/res/layout/design_bottom_sheet.xml
@@ -0,0 +1,72 @@
+<?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
+        android:id="@+id/coordinator"
+        xmlns:android="http://schemas.android.com/apk/res/android"
+        xmlns:app="http://schemas.android.com/apk/res/com.example.android.support.design"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent">
+
+    <!--
+        This is the bottom sheet. You can use any View as a bottom sheet by marking it with
+        app:layout_behavior as BottomSheetBehavior.
+    -->
+    <LinearLayout
+            android:id="@+id/bottom_sheet"
+            android:layout_width="match_parent"
+            android:layout_height="match_parent"
+            android:layout_marginLeft="@dimen/bottom_sheet_horizontal_margin"
+            android:layout_marginRight="@dimen/bottom_sheet_horizontal_margin"
+            android:background="?android:attr/windowBackground"
+            android:elevation="16dp"
+            android:minHeight="128dp"
+            android:orientation="vertical"
+            app:layout_behavior="android.support.design.widget.BottomSheetBehavior"
+            app:behavior_peekHeight="128dp">
+
+        <TextView
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:text="@string/bottom_sheet"
+                android:paddingTop="8dp"
+                android:paddingLeft="16dp"
+                android:paddingRight="16dp"
+                android:paddingBottom="8dp"
+                style="@style/TextAppearance.AppCompat.Title"/>
+
+        <View
+                android:layout_width="match_parent"
+                android:layout_height="1dp"
+                android:background="@android:color/darker_gray"/>
+
+        <android.support.v4.widget.NestedScrollView
+                android:id="@+id/scroll"
+                android:layout_width="match_parent"
+                android:layout_height="match_parent">
+
+            <TextView
+                    android:id="@+id/dialogue"
+                    android:layout_width="match_parent"
+                    android:layout_height="wrap_content"
+                    android:padding="16dp"
+                    style="@style/TextAppearance.AppCompat.Body1"/>
+
+        </android.support.v4.widget.NestedScrollView>
+
+    </LinearLayout>
+
+</android.support.design.widget.CoordinatorLayout>
\ No newline at end of file
diff --git a/samples/SupportDesignDemos/res/values-w540dp/dimens.xml b/samples/SupportDesignDemos/res/values-w540dp/dimens.xml
new file mode 100644
index 0000000..26fecbf
--- /dev/null
+++ b/samples/SupportDesignDemos/res/values-w540dp/dimens.xml
@@ -0,0 +1,19 @@
+<?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.
+-->
+<resources>
+    <dimen name="bottom_sheet_horizontal_margin">64dp</dimen>
+</resources>
diff --git a/samples/SupportDesignDemos/res/values/dimens.xml b/samples/SupportDesignDemos/res/values/dimens.xml
new file mode 100644
index 0000000..ac8777c
--- /dev/null
+++ b/samples/SupportDesignDemos/res/values/dimens.xml
@@ -0,0 +1,19 @@
+<?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.
+-->
+<resources>
+    <dimen name="bottom_sheet_horizontal_margin">0dp</dimen>
+</resources>
diff --git a/samples/SupportDesignDemos/res/values/strings.xml b/samples/SupportDesignDemos/res/values/strings.xml
index 1370ce0..a120337 100644
--- a/samples/SupportDesignDemos/res/values/strings.xml
+++ b/samples/SupportDesignDemos/res/values/strings.xml
@@ -21,6 +21,7 @@
     <string name="design_navigation">NavigationView/Usage</string>
     <string name="design_tabs_basic">TabLayout/Usage</string>
     <string name="design_text_input">Text Input</string>
+    <string name="design_bottomsheet">BottomSheet/Usage</string>
 
     <string name="fab_size_normal">Normal size</string>
     <string name="fab_size_mini">Mini size</string>
@@ -78,5 +79,6 @@
     <string name="menu_search">Search</string>
     <string name="menu_settings">Settings</string>
 
+    <string name="bottom_sheet">Bottom sheet</string>
 
 </resources>
diff --git a/samples/SupportDesignDemos/src/com/example/android/support/design/widget/BottomSheetUsage.java b/samples/SupportDesignDemos/src/com/example/android/support/design/widget/BottomSheetUsage.java
new file mode 100644
index 0000000..21f6ffe
--- /dev/null
+++ b/samples/SupportDesignDemos/src/com/example/android/support/design/widget/BottomSheetUsage.java
@@ -0,0 +1,54 @@
+/*
+ * 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.example.android.support.design.widget;
+
+import com.example.android.support.design.R;
+import com.example.android.support.design.Shakespeare;
+
+import android.os.Bundle;
+import android.support.annotation.Nullable;
+import android.support.design.widget.BottomSheetBehavior;
+import android.support.v7.app.AppCompatActivity;
+import android.text.TextUtils;
+import android.widget.LinearLayout;
+import android.widget.TextView;
+
+/**
+ * This demonstrates basic usage of {@link BottomSheetBehavior}.
+ */
+public class BottomSheetUsage extends AppCompatActivity {
+
+    private BottomSheetBehavior<LinearLayout> mBehavior;
+
+    @Override
+    protected void onCreate(@Nullable Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.design_bottom_sheet);
+        ((TextView) findViewById(R.id.dialogue)).setText(TextUtils.concat(Shakespeare.DIALOGUE));
+        mBehavior = BottomSheetBehavior.from((LinearLayout) findViewById(R.id.bottom_sheet));
+    }
+
+    @Override
+    public void onBackPressed() {
+        if (mBehavior != null && mBehavior.getState() != BottomSheetBehavior.STATE_COLLAPSED) {
+            mBehavior.setState(BottomSheetBehavior.STATE_COLLAPSED);
+        } else {
+            super.onBackPressed();
+        }
+    }
+
+}