Replace error/info footers with a message bar.

- Remove footers from DirectoryFragment.
- Add a new MessageBar fragment that can display error/info messages.

BUG=22638983

Change-Id: I2075ae8e4dca8954a09c1fc57ed62bb6d3bff7a9

10 files changed, 285 insertions, 271 deletions

diff --git a/packages/DocumentsUI/res/layout/directory_cluster.xml b/packages/DocumentsUI/res/layout/directory_cluster.xml
index e47e1960563c..8245e53097cd 100644
--- a/packages/DocumentsUI/res/layout/directory_cluster.xml
+++ b/packages/DocumentsUI/res/layout/directory_cluster.xml
@@ -18,6 +18,13 @@
     android:layout_height="match_parent"
     android:orientation="vertical">
 
+    <FrameLayout
+        android:id="@+id/container_message_bar"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:elevation="8dp"
+        android:background="@color/material_grey_50"/>
+
     <com.android.documentsui.DirectoryContainerView
         android:id="@+id/container_directory"
         android:layout_width="match_parent"
diff --git a/packages/DocumentsUI/res/layout/fragment_directory.xml b/packages/DocumentsUI/res/layout/fragment_directory.xml
index 7aff497ccb44..f5c73d5269c2 100644
--- a/packages/DocumentsUI/res/layout/fragment_directory.xml
+++ b/packages/DocumentsUI/res/layout/fragment_directory.xml
@@ -34,18 +34,42 @@
         android:layout_width="match_parent"
         android:layout_height="match_parent" />
 
-    <android.support.v7.widget.RecyclerView
-        android:id="@+id/recyclerView"
-        android:scrollbars="vertical"
+    <LinearLayout
+        android:id="@+id/content"
         android:layout_width="match_parent"
         android:layout_height="match_parent"
-        android:paddingStart="@dimen/grid_padding_horiz"
-        android:paddingEnd="@dimen/grid_padding_horiz"
-        android:paddingTop="@dimen/grid_padding_vert"
-        android:paddingBottom="@dimen/grid_padding_vert"
-        android:clipToPadding="false"
-        android:scrollbarStyle="outsideOverlay"
-        android:drawSelectorOnTop="true"
-        android:background="@color/directory_background" />
+        android:orientation="vertical"
+        android:animateLayoutChanges="true">
+
+        <FrameLayout
+            android:id="@+id/container_message_bar"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:elevation="8dp"
+            android:background="@color/material_grey_50"
+            android:visibility="gone"/>
+      
+        <!-- This FrameLayout works around b/24189541 -->
+        <FrameLayout
+            android:layout_width="match_parent"
+            android:layout_height="match_parent">
+          
+            <android.support.v7.widget.RecyclerView
+                android:id="@+id/recyclerView"
+                android:scrollbars="vertical"
+                android:layout_width="match_parent"
+                android:layout_height="match_parent"
+                android:paddingStart="@dimen/grid_padding_horiz"
+                android:paddingEnd="@dimen/grid_padding_horiz"
+                android:paddingTop="@dimen/grid_padding_vert"
+                android:paddingBottom="@dimen/grid_padding_vert"
+                android:clipToPadding="false"
+                android:scrollbarStyle="outsideOverlay"
+                android:drawSelectorOnTop="true"
+                android:background="@color/directory_background" />
+            
+        </FrameLayout>
+        
+    </LinearLayout>
 
 </com.android.documentsui.DirectoryView>
diff --git a/packages/DocumentsUI/res/layout/fragment_message_bar.xml b/packages/DocumentsUI/res/layout/fragment_message_bar.xml
new file mode 100644
index 000000000000..47e4e770b15c
--- /dev/null
+++ b/packages/DocumentsUI/res/layout/fragment_message_bar.xml
@@ -0,0 +1,100 @@
+<?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.
+-->
+
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    android:animateLayoutChanges="true"
+    android:layout_height="wrap_content"
+    android:layout_width="match_parent"
+    android:minHeight="?android:attr/listPreferredItemHeightSmall"
+    android:orientation="vertical"
+    android:paddingLeft="@dimen/list_item_padding"
+    android:paddingRight="@dimen/list_item_padding"
+    android:paddingTop="@dimen/list_item_padding">
+
+    <LinearLayout
+        android:id="@+id/container_info"
+        android:layout_height="wrap_content"
+        android:layout_width="wrap_content"
+        android:orientation="horizontal"
+        android:visibility="gone">
+
+        <FrameLayout
+            android:layout_height="@dimen/icon_size"
+            android:layout_width="@dimen/icon_size">
+
+            <ImageView
+                android:contentDescription="@null"
+                android:id="@+id/icon_info"
+                android:layout_height="match_parent"
+                android:layout_width="wrap_content"
+                android:scaleType="centerInside"/>
+
+        </FrameLayout>
+
+        <TextView
+            android:id="@+id/textview_info"
+            android:layout_gravity="center_vertical"
+            android:layout_height="wrap_content"
+            android:layout_width="match_parent"
+            android:selectAllOnFocus="true"/>
+
+    </LinearLayout>
+
+    <LinearLayout
+        android:id="@+id/container_error"
+        android:layout_height="wrap_content"
+        android:layout_width="wrap_content"
+        android:orientation="horizontal"
+        android:visibility="gone">
+
+        <FrameLayout
+            android:layout_height="@dimen/icon_size"
+            android:layout_width="@dimen/icon_size">
+
+            <ImageView
+                android:contentDescription="@null"
+                android:id="@+id/icon_error"
+                android:layout_height="match_parent"
+                android:layout_width="wrap_content"
+                android:scaleType="centerInside"/>
+
+        </FrameLayout>
+
+        <TextView
+            android:id="@+id/textview_error"
+            android:layout_gravity="center_vertical"
+            android:layout_height="wrap_content"
+            android:layout_width="match_parent"
+            android:selectAllOnFocus="true"/>
+
+    </LinearLayout>
+
+    <LinearLayout
+        android:layout_gravity="right"
+        android:layout_height="wrap_content"
+        android:layout_width="wrap_content"
+        android:orientation="horizontal">
+
+        <Button
+            android:id="@+id/button_dismiss"
+            android:layout_height="wrap_content"
+            android:layout_width="wrap_content"
+            android:text="@string/button_dismiss"
+            style="?android:attr/buttonBarPositiveButtonStyle"/>
+
+    </LinearLayout>
+
+</LinearLayout>
diff --git a/packages/DocumentsUI/res/layout/item_loading_grid.xml b/packages/DocumentsUI/res/layout/item_loading_grid.xml
deleted file mode 100644
index 147dfd449724..000000000000
--- a/packages/DocumentsUI/res/layout/item_loading_grid.xml
+++ /dev/null
@@ -1,29 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<!-- Copyright (C) 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.
--->
-
-<com.android.documentsui.GridItem xmlns:android="http://schemas.android.com/apk/res/android"
-    android:layout_width="match_parent"
-    android:layout_height="@dimen/grid_height"
-    android:orientation="horizontal">
-
-    <ProgressBar
-        android:layout_width="wrap_content"
-        android:layout_height="wrap_content"
-        android:layout_gravity="center"
-        android:indeterminate="true"
-        style="?android:attr/progressBarStyle" />
-
-</com.android.documentsui.GridItem>
diff --git a/packages/DocumentsUI/res/layout/item_loading_list.xml b/packages/DocumentsUI/res/layout/item_loading_list.xml
deleted file mode 100644
index 6f214edea8c4..000000000000
--- a/packages/DocumentsUI/res/layout/item_loading_list.xml
+++ /dev/null
@@ -1,29 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<!-- Copyright (C) 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.
--->
-
-<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
-    android:layout_width="match_parent"
-    android:layout_height="wrap_content"
-    android:minHeight="@dimen/list_item_height">
-
-    <ProgressBar
-        android:layout_width="wrap_content"
-        android:layout_height="wrap_content"
-        android:layout_gravity="center"
-        android:indeterminate="true"
-        style="?android:attr/progressBarStyle" />
-
-</FrameLayout>
diff --git a/packages/DocumentsUI/res/layout/item_message_grid.xml b/packages/DocumentsUI/res/layout/item_message_grid.xml
deleted file mode 100644
index 45d61a506bb5..000000000000
--- a/packages/DocumentsUI/res/layout/item_message_grid.xml
+++ /dev/null
@@ -1,51 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<!-- Copyright (C) 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.
--->
-
-<com.android.documentsui.GridItem xmlns:android="http://schemas.android.com/apk/res/android"
-    android:layout_width="match_parent"
-    android:layout_height="@dimen/grid_height"
-    android:paddingStart="?android:attr/listPreferredItemPaddingStart"
-    android:paddingEnd="?android:attr/listPreferredItemPaddingEnd"
-    android:paddingTop="8dp"
-    android:paddingBottom="8dp">
-
-    <LinearLayout
-        android:layout_width="match_parent"
-        android:layout_height="match_parent"
-        android:orientation="vertical"
-        android:gravity="center">
-
-        <ImageView
-            android:id="@android:id/icon"
-            android:layout_width="wrap_content"
-            android:layout_height="wrap_content"
-            android:contentDescription="@null" />
-
-        <TextView
-            android:id="@android:id/title"
-            android:layout_width="wrap_content"
-            android:layout_height="wrap_content"
-            android:gravity="center"
-            android:maxLines="4"
-            android:ellipsize="end"
-            android:paddingTop="8dp"
-            android:textAlignment="viewStart"
-            android:textAppearance="@android:style/TextAppearance.Material.Body1"
-            android:textColor="?android:attr/textColorPrimary" />
-
-    </LinearLayout>
-
-</com.android.documentsui.GridItem>
diff --git a/packages/DocumentsUI/res/layout/item_message_list.xml b/packages/DocumentsUI/res/layout/item_message_list.xml
deleted file mode 100644
index 44c8baf8cb68..000000000000
--- a/packages/DocumentsUI/res/layout/item_message_list.xml
+++ /dev/null
@@ -1,54 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<!-- Copyright (C) 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.
--->
-
-<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
-    android:layout_width="match_parent"
-    android:layout_height="wrap_content"
-    android:minHeight="@dimen/list_item_height"
-    android:paddingStart="@dimen/list_item_padding"
-    android:paddingEnd="@dimen/list_item_padding"
-    android:paddingTop="8dp"
-    android:paddingBottom="8dp"
-    android:gravity="center_vertical"
-    android:orientation="horizontal"
-    android:baselineAligned="false">
-
-    <FrameLayout
-        android:layout_width="@dimen/icon_size"
-        android:layout_height="@dimen/icon_size"
-        android:layout_marginEnd="16dp">
-
-        <ImageView
-            android:id="@android:id/icon"
-            android:layout_width="wrap_content"
-            android:layout_height="match_parent"
-            android:scaleType="centerInside"
-            android:contentDescription="@null" />
-
-    </FrameLayout>
-
-    <TextView
-        android:id="@android:id/title"
-        android:layout_width="match_parent"
-        android:layout_height="wrap_content"
-        android:layout_gravity="center_vertical"
-        android:maxLines="2"
-        android:ellipsize="end"
-        android:textAlignment="viewStart"
-        android:textAppearance="@android:style/TextAppearance.Material.Body1"
-        android:textColor="?android:attr/textColorPrimary" />
-
-</LinearLayout>
diff --git a/packages/DocumentsUI/res/values/strings.xml b/packages/DocumentsUI/res/values/strings.xml
index 4b44d7c7dc16..28018f8eceec 100644
--- a/packages/DocumentsUI/res/values/strings.xml
+++ b/packages/DocumentsUI/res/values/strings.xml
@@ -79,6 +79,8 @@
     <string name="button_copy">Copy</string>
     <!-- Button label that moves files to the current directory [CHAR LIMIT=24] -->
     <string name="button_move">Move</string>
+    <!-- Button label that hides the error bar [CHAR LIMIT=24] -->
+    <string name="button_dismiss">Dismiss</string>
 
     <!-- Mode that sorts documents by their display name alphabetically [CHAR LIMIT=24] -->
     <string name="sort_name">By name</string>
diff --git a/packages/DocumentsUI/src/com/android/documentsui/DirectoryFragment.java b/packages/DocumentsUI/src/com/android/documentsui/DirectoryFragment.java
index e351d3ce02c7..8722082856a6 100644
--- a/packages/DocumentsUI/src/com/android/documentsui/DirectoryFragment.java
+++ b/packages/DocumentsUI/src/com/android/documentsui/DirectoryFragment.java
@@ -159,6 +159,8 @@ public class DirectoryFragment extends Fragment {
     private GridLayoutManager mGridLayout;
     private int mColumnCount = 1;  // This will get updated when layout changes.
 
+    private MessageBar mMessageBar;
+
     public static void showNormal(FragmentManager fm, RootInfo root, DocumentInfo doc, int anim) {
         show(fm, TYPE_NORMAL, root, doc, null, anim);
     }
@@ -220,6 +222,8 @@ public class DirectoryFragment extends Fragment {
         final Resources res = context.getResources();
         final View view = inflater.inflate(R.layout.fragment_directory, container, false);
 
+        mMessageBar = MessageBar.create(getChildFragmentManager());
+
         mEmptyView = view.findViewById(android.R.id.empty);
 
         mRecView = (RecyclerView) view.findViewById(R.id.recyclerView);
@@ -611,7 +615,7 @@ public class DirectoryFragment extends Fragment {
 
         @Override
         public boolean onBeforeItemStateChange(int position, boolean selected) {
-            // Directories and footer items cannot be checked
+            // Directories cannot be checked
             if (selected) {
                 final Cursor cursor = mModel.getItem(position);
                 checkNotNull(cursor, "Cursor cannot be null.");
@@ -870,79 +874,6 @@ public class DirectoryFragment extends Fragment {
         return ((BaseActivity) fragment.getActivity()).getDisplayState();
     }
 
-    private static abstract class Footer {
-        private final int mItemViewType;
-
-        public Footer(int itemViewType) {
-            mItemViewType = itemViewType;
-        }
-
-        public abstract View getView(View convertView, ViewGroup parent);
-
-        public int getItemViewType() {
-            return mItemViewType;
-        }
-    }
-
-    private class LoadingFooter extends Footer {
-        public LoadingFooter() {
-            super(1);
-        }
-
-        @Override
-        public View getView(View convertView, ViewGroup parent) {
-            final Context context = parent.getContext();
-            final State state = getDisplayState(DirectoryFragment.this);
-
-            if (convertView == null) {
-                final LayoutInflater inflater = LayoutInflater.from(context);
-                if (state.derivedMode == MODE_LIST) {
-                    convertView = inflater.inflate(R.layout.item_loading_list, parent, false);
-                } else if (state.derivedMode == MODE_GRID) {
-                    convertView = inflater.inflate(R.layout.item_loading_grid, parent, false);
-                } else {
-                    throw new IllegalStateException();
-                }
-            }
-
-            return convertView;
-        }
-    }
-
-    private class MessageFooter extends Footer {
-        private final int mIcon;
-        private final String mMessage;
-
-        public MessageFooter(int itemViewType, int icon, String message) {
-            super(itemViewType);
-            mIcon = icon;
-            mMessage = message;
-        }
-
-        @Override
-        public View getView(View convertView, ViewGroup parent) {
-            final Context context = parent.getContext();
-            final State state = getDisplayState(DirectoryFragment.this);
-
-            if (convertView == null) {
-                final LayoutInflater inflater = LayoutInflater.from(context);
-                if (state.derivedMode == MODE_LIST) {
-                    convertView = inflater.inflate(R.layout.item_message_list, parent, false);
-                } else if (state.derivedMode == MODE_GRID) {
-                    convertView = inflater.inflate(R.layout.item_message_grid, parent, false);
-                } else {
-                    throw new IllegalStateException();
-                }
-            }
-
-            final ImageView icon = (ImageView) convertView.findViewById(android.R.id.icon);
-            final TextView title = (TextView) convertView.findViewById(android.R.id.title);
-            icon.setImageResource(mIcon);
-            title.setText(mMessage);
-            return convertView;
-        }
-    }
-
     // Provide a reference to the views for each data item
     // Complex data items may need more than one view per item, and
     // you provide access to all the views for a data item in a view holder
@@ -961,24 +892,18 @@ public class DirectoryFragment extends Fragment {
 
         private final Context mContext;
         private final LayoutInflater mInflater;
-        // TODO: Bring back support for footers.
-        private final List<Footer> mFooters = new ArrayList<>();
 
         public DocumentsAdapter(Context context) {
             mContext = context;
             mInflater = LayoutInflater.from(context);
         }
 
+        @Override
         public void onModelUpdate(Model model) {
-            mFooters.clear();
-            if (model.info != null) {
-                mFooters.add(new MessageFooter(2, R.drawable.ic_dialog_info, model.info));
-            }
-            if (model.error != null) {
-                mFooters.add(new MessageFooter(3, R.drawable.ic_dialog_alert, model.error));
-            }
-            if (model.isLoading()) {
-                mFooters.add(new LoadingFooter());
+            if (model.info != null || model.error != null) {
+                mMessageBar.setInfo(model.info);
+                mMessageBar.setError(model.error);
+                mMessageBar.show();
             }
 
             if (model.isEmpty()) {
@@ -990,9 +915,10 @@ public class DirectoryFragment extends Fragment {
             notifyDataSetChanged();
         }
 
+        @Override
         public void onModelUpdateFailed(Exception e) {
+            // TODO: deal with catastrophic update failures
             String error = getString(R.string.query_error);
-            mFooters.add(new MessageFooter(3, R.drawable.ic_dialog_alert, error));
             notifyDataSetChanged();
         }
 
@@ -1212,19 +1138,8 @@ public class DirectoryFragment extends Fragment {
         @Override
         public int getItemCount() {
             return mModel.getItemCount();
-            // return mCursorCount + mFooters.size();
         }
 
-        @Override
-        public int getItemViewType(int position) {
-            final int itemCount = mModel.getItemCount();
-            if (position < itemCount) {
-                return 0;
-            } else {
-                position -= itemCount;
-                return mFooters.get(position).getItemViewType();
-            }
-        }
     }
 
     private static String formatTime(Context context, long when) {
diff --git a/packages/DocumentsUI/src/com/android/documentsui/MessageBar.java b/packages/DocumentsUI/src/com/android/documentsui/MessageBar.java
new file mode 100644
index 000000000000..a48fd5c268b4
--- /dev/null
+++ b/packages/DocumentsUI/src/com/android/documentsui/MessageBar.java
@@ -0,0 +1,129 @@
+/*
+ * 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.android.documentsui;
+
+import android.annotation.Nullable;
+import android.app.Fragment;
+import android.app.FragmentManager;
+import android.app.FragmentTransaction;
+import android.os.Bundle;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.ViewGroup;
+import android.widget.Button;
+import android.widget.ImageView;
+import android.widget.TextView;
+
+/**
+ * A message bar displaying some info/error messages and a Dismiss button.
+ */
+public class MessageBar extends Fragment {
+    private View mView;
+    private ViewGroup mContainer;
+
+    /**
+     * Creates an instance of a MessageBar. Note that the new MessagBar is not visible by default,
+     * and has to be shown by calling MessageBar.show.
+     */
+    public static MessageBar create(FragmentManager fm) {
+        final MessageBar fragment = new MessageBar();
+
+        final FragmentTransaction ft = fm.beginTransaction();
+        ft.replace(R.id.container_message_bar, fragment);
+        ft.commitAllowingStateLoss();
+
+        return fragment;
+    }
+
+    /**
+     * Sets the info message. Can be null, in which case no info message will be displayed. The
+     * message bar layout will be adjusted accordingly.
+     */
+    public void setInfo(@Nullable String info) {
+        View infoContainer = mView.findViewById(R.id.container_info);
+        if (info != null) {
+            TextView infoText = (TextView) mView.findViewById(R.id.textview_info);
+            infoText.setText(info);
+            infoContainer.setVisibility(View.VISIBLE);
+        } else {
+            infoContainer.setVisibility(View.GONE);
+        }
+    }
+
+    /**
+     * Sets the error message. Can be null, in which case no error message will be displayed. The
+     * message bar layout will be adjusted accordingly.
+     */
+    public void setError(@Nullable String error) {
+        View errorView = mView.findViewById(R.id.container_message_bar);
+        if (error != null) {
+            TextView errorText = (TextView) mView.findViewById(R.id.textview_error);
+            errorText.setText(error);
+            errorView.setVisibility(View.VISIBLE);
+        } else {
+            errorView.setVisibility(View.GONE);
+        }
+    }
+
+    @Override
+    public View onCreateView(
+            LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
+
+        mView = inflater.inflate(R.layout.fragment_message_bar, container, false);
+
+        ImageView infoIcon = (ImageView) mView.findViewById(R.id.icon_info);
+        infoIcon.setImageResource(R.drawable.ic_dialog_info);
+
+        ImageView errorIcon = (ImageView) mView.findViewById(R.id.icon_error);
+        errorIcon.setImageResource(R.drawable.ic_dialog_alert);
+
+        Button dismiss = (Button) mView.findViewById(R.id.button_dismiss);
+        dismiss.setOnClickListener(
+                new View.OnClickListener() {
+                    @Override
+                    public void onClick(View v) {
+                        hide();
+                    }
+                });
+
+        mContainer = container;
+
+        return mView;
+    }
+
+    void hide() {
+        // The container view is used to show/hide the error bar. If a container is not provided,
+        // fall back to showing/hiding the error bar View, which also works, but does not provide
+        // the same animated transition.
+        if (mContainer != null) {
+            mContainer.setVisibility(View.GONE);
+        } else {
+            mView.setVisibility(View.GONE);
+        }
+    }
+
+    void show() {
+        // The container view is used to show/hide the error bar. If a container is not provided,
+        // fall back to showing/hiding the error bar View, which also works, but does not provide
+        // the same animated transition.
+        if (mContainer != null) {
+            mContainer.setVisibility(View.VISIBLE);
+        } else {
+            mView.setVisibility(View.VISIBLE);
+        }
+    }
+}