Adding WidgetPreview utility.

Change-Id: Idfdf866400687e58304863c3c4f3dd3c4aed45b1
diff --git a/apps/WidgetPreview/Android.mk b/apps/WidgetPreview/Android.mk
new file mode 100644
index 0000000..04a4927
--- /dev/null
+++ b/apps/WidgetPreview/Android.mk
@@ -0,0 +1,27 @@
+#
+# Copyright (C) 2010 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.
+#
+
+LOCAL_PATH:= $(call my-dir)
+include $(CLEAR_VARS)
+
+LOCAL_MODULE_TAGS := samples
+
+LOCAL_SRC_FILES := $(call all-subdir-java-files)
+
+LOCAL_PACKAGE_NAME := WidgetPreview
+LOCAL_SDK_VERSION := current
+
+include $(BUILD_PACKAGE)
diff --git a/apps/WidgetPreview/AndroidManifest.xml b/apps/WidgetPreview/AndroidManifest.xml
new file mode 100644
index 0000000..3d50188
--- /dev/null
+++ b/apps/WidgetPreview/AndroidManifest.xml
@@ -0,0 +1,37 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Copyright (C) 2010 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.android.widgetpreview">
+
+    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
+    <uses-permission android:name="android.permission.BIND_APPWIDGET" />
+
+    <application android:label="@string/application_label">
+
+        <activity
+                android:name="WidgetPreviewActivity"
+                android:label="@string/application_label"
+                android:icon="@drawable/ic_widget_preview">
+            <intent-filter>
+                <action android:name="android.intent.action.MAIN"/>
+                <category android:name="android.intent.category.LAUNCHER"/>
+                <category android:name="android.intent.category.DEFAULT"/>
+            </intent-filter>
+        </activity>
+
+    </application>
+</manifest>
diff --git a/apps/WidgetPreview/res/drawable-hdpi/ic_widget_preview.png b/apps/WidgetPreview/res/drawable-hdpi/ic_widget_preview.png
new file mode 100644
index 0000000..168cdda
--- /dev/null
+++ b/apps/WidgetPreview/res/drawable-hdpi/ic_widget_preview.png
Binary files differ
diff --git a/apps/WidgetPreview/res/drawable-mdpi/ic_widget_preview.png b/apps/WidgetPreview/res/drawable-mdpi/ic_widget_preview.png
new file mode 100644
index 0000000..55c7661
--- /dev/null
+++ b/apps/WidgetPreview/res/drawable-mdpi/ic_widget_preview.png
Binary files differ
diff --git a/apps/WidgetPreview/res/layout/activity_main.xml b/apps/WidgetPreview/res/layout/activity_main.xml
new file mode 100644
index 0000000..e43d246
--- /dev/null
+++ b/apps/WidgetPreview/res/layout/activity_main.xml
@@ -0,0 +1,45 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Copyright (C) 2010 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 xmlns:android="http://schemas.android.com/apk/res/android"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        android:padding="20dp">
+    <Button
+            android:id="@+id/email_button"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:layout_alignParentBottom="true"
+            android:text="@string/email_button" />
+    <Button
+            android:id="@+id/snapshot_button"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:layout_above="@id/email_button"
+            android:text="@string/snapshot_button" />
+    <FrameLayout
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_alignParentTop="true"
+            android:layout_above="@id/snapshot_button"
+            android:layout_centerHorizontal="true">
+        <FrameLayout
+                android:id="@+id/main_frame"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content">
+        </FrameLayout>
+    </FrameLayout>
+</RelativeLayout>
\ No newline at end of file
diff --git a/apps/WidgetPreview/res/values-land/dimens.xml b/apps/WidgetPreview/res/values-land/dimens.xml
new file mode 100644
index 0000000..dea2576
--- /dev/null
+++ b/apps/WidgetPreview/res/values-land/dimens.xml
@@ -0,0 +1,22 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Copyright (C) 2010 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="workspace_cell_width">106dip</dimen>
+    <dimen name="workspace_cell_height">74dip</dimen>
+    <dimen name="workspace_width_gap">0dp</dimen>
+    <dimen name="workspace_height_gap">0dp</dimen>
+</resources>
diff --git a/apps/WidgetPreview/res/values-port/dimens.xml b/apps/WidgetPreview/res/values-port/dimens.xml
new file mode 100644
index 0000000..0276ffb
--- /dev/null
+++ b/apps/WidgetPreview/res/values-port/dimens.xml
@@ -0,0 +1,22 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Copyright (C) 2010 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="workspace_cell_width">80dip</dimen>
+    <dimen name="workspace_cell_height">100dip</dimen>
+    <dimen name="workspace_width_gap">0dp</dimen>
+    <dimen name="workspace_height_gap">0dp</dimen>
+</resources>
diff --git a/apps/WidgetPreview/res/values-xlarge/dimens.xml b/apps/WidgetPreview/res/values-xlarge/dimens.xml
new file mode 100644
index 0000000..b6b5dfe
--- /dev/null
+++ b/apps/WidgetPreview/res/values-xlarge/dimens.xml
@@ -0,0 +1,22 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Copyright (C) 2010 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="workspace_cell_width">96dip</dimen>
+    <dimen name="workspace_cell_height">96dip</dimen>
+    <dimen name="workspace_width_gap">0dp</dimen>
+    <dimen name="workspace_height_gap">0dp</dimen>
+</resources>
diff --git a/apps/WidgetPreview/res/values/dimens.xml b/apps/WidgetPreview/res/values/dimens.xml
new file mode 100644
index 0000000..ccd71d3
--- /dev/null
+++ b/apps/WidgetPreview/res/values/dimens.xml
@@ -0,0 +1,19 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Copyright (C) 2010 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="preview_cell_size">196dip</dimen>
+</resources>
diff --git a/apps/WidgetPreview/res/values/strings.xml b/apps/WidgetPreview/res/values/strings.xml
new file mode 100644
index 0000000..2cc9ccf
--- /dev/null
+++ b/apps/WidgetPreview/res/values/strings.xml
@@ -0,0 +1,29 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Copyright (C) 2010 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>
+    <string name="application_label">Widget Preview</string>
+    <string name="saving_preview">Saving widget preview...</string>
+    <string name="preview_saved">Widget preview saved!</string>
+    <string name="no_preview">Please take a snapshot first</string>
+    <string name="preview_save_error">Error saving preview</string>
+    <string name="configure_error">Error configuring, no configuration activity found</string>
+    <string name="email_subject">Widget preview</string>
+    <string name="email_body">Attached is the preview of your AppWidget</string>
+
+    <string name="snapshot_button">Take Snapshot</string>
+    <string name="email_button">Email Preview</string>
+</resources>
diff --git a/apps/WidgetPreview/src/com/android/widgetpreview/WidgetPreviewActivity.java b/apps/WidgetPreview/src/com/android/widgetpreview/WidgetPreviewActivity.java
new file mode 100644
index 0000000..1026ba8
--- /dev/null
+++ b/apps/WidgetPreview/src/com/android/widgetpreview/WidgetPreviewActivity.java
@@ -0,0 +1,322 @@
+/*
+ * Copyright (C) 2010 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.widgetpreview;
+
+import android.app.Activity;
+import android.appwidget.AppWidgetHost;
+import android.appwidget.AppWidgetHostView;
+import android.appwidget.AppWidgetManager;
+import android.appwidget.AppWidgetProviderInfo;
+import android.content.ActivityNotFoundException;
+import android.content.Intent;
+import android.content.res.Configuration;
+import android.content.res.Resources;
+import android.graphics.Bitmap;
+import android.graphics.Bitmap.CompressFormat;
+import android.graphics.Bitmap.Config;
+import android.graphics.Canvas;
+import android.net.Uri;
+import android.os.Bundle;
+import android.os.Environment;
+import android.util.Log;
+import android.view.View;
+import android.view.View.OnClickListener;
+import android.view.ViewGroup;
+import android.widget.Button;
+import android.widget.FrameLayout;
+import android.widget.Toast;
+
+import java.io.File;
+import java.io.FileOutputStream;
+import java.io.IOException;
+
+public class WidgetPreviewActivity extends Activity implements OnClickListener {
+
+    private static final String LOG_TAG = "WidgetPreviewActivity";
+    private static final boolean DEBUG = true;
+    private static final int APPWIDGET_HOST_ID = 2048;
+    private static final int REQUEST_WIDGET = 0;
+    private static final int REQUEST_CONFIGURE = 1;
+
+    private AppWidgetHost mAppWidgetHost = null;
+    private FrameLayout mAppWidgetFrame = null;
+    private AppWidgetHostView mAppWidgetView = null;
+    private int mAppWidgetId = AppWidgetManager.INVALID_APPWIDGET_ID;
+    private String mAppWidgetName;
+    private int mPreviewWidth;
+    private int mPreviewHeight;
+
+    private Button mSnapshotButton = null;
+    private Button mEmailButton = null;
+
+    @Override
+    public void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.activity_main);
+        mAppWidgetFrame = (FrameLayout)findViewById(R.id.main_frame);
+        mSnapshotButton = (Button)findViewById(R.id.snapshot_button);
+        mSnapshotButton.setOnClickListener(this);
+        mEmailButton = (Button)findViewById(R.id.email_button);
+        mEmailButton.setOnClickListener(this);
+
+        mAppWidgetHost = new AppWidgetHost(getApplicationContext(), APPWIDGET_HOST_ID);
+
+        final Object retainedObj = getLastNonConfigurationInstance();
+        if (retainedObj instanceof AppWidgetProviderInfo) {
+            AppWidgetProviderInfo info = (AppWidgetProviderInfo) retainedObj;
+            int id = mAppWidgetHost.allocateAppWidgetId();
+            AppWidgetManager.getInstance(getBaseContext()).bindAppWidgetId(id, info.provider);
+            setAppWidget(id);
+        } else {
+            startChooseActivity();
+        }
+    }
+
+    @Override
+    public void onStart() {
+        super.onStart();
+        mAppWidgetHost.startListening();
+    }
+
+    @Override
+    public Object onRetainNonConfigurationInstance() {
+        AppWidgetProviderInfo info = AppWidgetManager.getInstance(
+                getBaseContext()).getAppWidgetInfo(mAppWidgetId);
+        return info;
+    }
+
+    private void startChooseActivity() {
+        int id = mAppWidgetHost.allocateAppWidgetId();
+        Intent selectIntent = new Intent(AppWidgetManager.ACTION_APPWIDGET_PICK);
+        selectIntent.putExtra(AppWidgetManager.EXTRA_APPWIDGET_ID, id);
+        startActivityForResult(selectIntent, REQUEST_WIDGET);
+    }
+
+    @Override
+    public void onActivityResult(int requestCode, int resultCode, Intent data) {
+        if (requestCode == REQUEST_WIDGET) {
+            if (data != null) {
+                int appWidgetId = AppWidgetManager.INVALID_APPWIDGET_ID;
+                if (data.hasExtra(AppWidgetManager.EXTRA_APPWIDGET_ID)) {
+                    appWidgetId = data.getExtras().getInt(AppWidgetManager.EXTRA_APPWIDGET_ID);
+                }
+
+                if (resultCode == RESULT_OK) {
+                    setAppWidget(appWidgetId);
+                } else {
+                    mAppWidgetHost.deleteAppWidgetId(appWidgetId);
+                    finish();
+                }
+            } else {
+                finish();
+            }
+        } else if (requestCode == REQUEST_CONFIGURE) {
+            if (data != null) {
+                int appWidgetId = data.getExtras().getInt(
+                        AppWidgetManager.EXTRA_APPWIDGET_ID, AppWidgetManager.INVALID_APPWIDGET_ID);
+                if (resultCode == RESULT_OK) {
+                    finishSetAppWidget(appWidgetId);
+                } else {
+                    mAppWidgetHost.deleteAppWidgetId(appWidgetId);
+                }
+            }
+        }
+    }
+
+    private void setAppWidget(int appWidgetId) {
+        if (mAppWidgetId != AppWidgetManager.INVALID_APPWIDGET_ID) {
+            mAppWidgetHost.deleteAppWidgetId(mAppWidgetId);
+        }
+
+        /* Check for configuration */
+        AppWidgetProviderInfo providerInfo =
+            AppWidgetManager.getInstance(getBaseContext()).getAppWidgetInfo(appWidgetId);
+
+        if (providerInfo.configure != null) {
+            Intent configureIntent = new Intent(AppWidgetManager.ACTION_APPWIDGET_CONFIGURE);
+            configureIntent.setComponent(providerInfo.configure);
+            configureIntent.putExtra(AppWidgetManager.EXTRA_APPWIDGET_ID, appWidgetId);
+
+            if (configureIntent != null) {
+                try {
+                    startActivityForResult(configureIntent, REQUEST_CONFIGURE);
+                } catch (ActivityNotFoundException e) {
+                    Log.d(LOG_TAG, "Configuration activity not found: " + e);
+                    Toast errorToast = Toast.makeText(
+                            getBaseContext(), R.string.configure_error, Toast.LENGTH_SHORT);
+                    errorToast.show();
+                }
+            }
+        } else {
+            finishSetAppWidget(appWidgetId);
+        }
+    }
+
+    private void finishSetAppWidget(int appWidgetId) {
+        AppWidgetProviderInfo providerInfo =
+            AppWidgetManager.getInstance(getBaseContext()).getAppWidgetInfo(appWidgetId);
+        if (providerInfo != null) {
+            mAppWidgetView =
+                    mAppWidgetHost.createView(getBaseContext(), appWidgetId, providerInfo);
+
+            int [] dimensions =
+                    getLauncherCellDimensions(providerInfo.minWidth, providerInfo.minHeight);
+
+            mPreviewWidth = dimensions[0];
+            mPreviewHeight = dimensions[1];
+
+            mAppWidgetName =
+                AppWidgetManager.getInstance(getBaseContext()).getAppWidgetInfo(appWidgetId).label;
+            mAppWidgetName = mAppWidgetName.replaceAll("[^a-zA-Z0-9]", "_");
+
+            ViewGroup.LayoutParams p = new ViewGroup.LayoutParams(
+                    ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.MATCH_PARENT);
+            mAppWidgetView.setLayoutParams(p);
+            mAppWidgetFrame.removeAllViews();
+            mAppWidgetHost.deleteAppWidgetId(mAppWidgetId);
+            mAppWidgetFrame.addView(mAppWidgetView, mPreviewWidth, mPreviewHeight);
+            mAppWidgetId = appWidgetId;
+        }
+    }
+
+    // Taken from CellLayout.java
+    public int[] getLauncherCellDimensions(int width, int height) {
+        // Always assume we're working with the smallest span to make sure we
+        // reserve enough space in both orientations.
+        Resources resources = getResources();
+        int cellWidth = resources.getDimensionPixelSize(R.dimen.workspace_cell_width);
+        int cellHeight = resources.getDimensionPixelSize(R.dimen.workspace_cell_height);
+        int widthGap = resources.getDimensionPixelSize(R.dimen.workspace_width_gap);
+        int heightGap = resources.getDimensionPixelSize(R.dimen.workspace_height_gap);
+        int previewCellSize = resources.getDimensionPixelSize(R.dimen.preview_cell_size);
+
+        // This logic imitates Launcher's CellLayout.rectToCell.
+        // Always round up to next largest cell
+        int smallerSize = Math.min(cellWidth, cellHeight);
+        int spanX = (width + smallerSize) / smallerSize;
+        int spanY = (height + smallerSize) / smallerSize;
+
+        // We use a fixed preview cell size so that you get the same preview image for
+        // the same cell-sized widgets across all devices
+        width = spanX * previewCellSize + ((spanX - 1) * widthGap);
+        height = spanY * previewCellSize + ((spanY - 1) * heightGap);
+        return new int[] { width, height };
+    }
+
+    private File buildFile(String name) {
+        if (!Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)) {
+            return null;
+        }
+
+        File path = Environment.getExternalStoragePublicDirectory(
+                Environment.DIRECTORY_DOWNLOADS);
+        int orientationCode = getResources().getConfiguration().orientation;
+        String orientation;
+        if (getResources().getConfiguration().orientation == Configuration.ORIENTATION_LANDSCAPE) {
+            orientation = "landscape";
+        } else if (orientationCode == Configuration.ORIENTATION_PORTRAIT) {
+            orientation = "portrait";
+        } else if (orientationCode == Configuration.ORIENTATION_SQUARE) {
+            orientation = "square";
+        } else {
+            orientation = "undefined";
+        }
+        return new File(path, name + "_ori_" + orientation + ".png");
+    }
+
+    public Bitmap getPreviewBitmap() {
+        mAppWidgetView.invalidate();
+        Bitmap bmp = Bitmap.createBitmap(
+                mAppWidgetView.getWidth(), mAppWidgetView.getHeight(), Config.ARGB_8888);
+        Canvas c = new Canvas(bmp);
+        mAppWidgetView.draw(c);
+        return bmp;
+    }
+
+    private boolean saveImage(Bitmap bmp, String name) {
+        File pic = buildFile(mAppWidgetName);
+        if (pic == null) {
+            Log.d(LOG_TAG, "External storage not present");
+            return false;
+        }
+
+        pic.getParentFile().mkdirs();
+        FileOutputStream fout = null;
+        try {
+            fout = new FileOutputStream(pic);
+            if (!bmp.compress(CompressFormat.PNG, 100, fout)) {
+                Log.d(LOG_TAG, "Failed to compress image");
+                return false;
+            }
+            return true;
+        } catch (IOException e) {
+            Log.d(LOG_TAG, "Error writing to disk: " + e);
+        } finally {
+            try {
+                if (fout != null) {
+                    fout.close();
+                }
+            } catch (IOException e) {
+                Log.d(LOG_TAG, "Could not close file: " + e);
+            }
+        }
+        return false;
+    }
+
+    @Override
+    public void onBackPressed() {
+        if (!getFragmentManager().popBackStackImmediate()) {
+            startChooseActivity();
+        }
+    }
+
+    @Override
+    public void onClick(View v) {
+        if (v == mSnapshotButton) {
+            int textId = R.string.saving_preview;
+
+            Toast preToast = Toast.makeText(getBaseContext(), textId, Toast.LENGTH_SHORT);
+            preToast.show();
+
+            Bitmap bmp = getPreviewBitmap();
+            if (saveImage(bmp, mAppWidgetName)) {
+                textId = R.string.preview_saved;
+            } else {
+                textId = R.string.preview_save_error;
+            }
+
+            Toast postToast = Toast.makeText(getBaseContext(), textId, Toast.LENGTH_SHORT);
+            postToast.show();
+        } else if (v == mEmailButton) {
+            File file = buildFile(mAppWidgetName);
+            if (file.exists()) {
+                Intent emailIntent = new Intent(Intent.ACTION_SEND);
+                emailIntent.setType("image/png");
+                emailIntent.putExtra(Intent.EXTRA_SUBJECT,
+                        getResources().getString(R.string.email_subject));
+                emailIntent.putExtra(Intent.EXTRA_TEXT,
+                        getResources().getString(R.string.email_body));
+                emailIntent.putExtra(Intent.EXTRA_STREAM, Uri.fromFile(file));
+                startActivity(emailIntent);
+            } else {
+                Toast postToast = Toast.makeText(
+                        getBaseContext(), R.string.no_preview, Toast.LENGTH_SHORT);
+                postToast.show();
+            }
+        }
+    }
+}
diff --git a/build/sdk.atree b/build/sdk.atree
index 842a30e..17a39ed 100644
--- a/build/sdk.atree
+++ b/build/sdk.atree
@@ -171,6 +171,7 @@
 development/samples/TicTacToeLib             samples/${PLATFORM_NAME}/TicTacToeLib
 development/samples/TicTacToeMain            samples/${PLATFORM_NAME}/TicTacToeMain
 development/samples/VoiceRecognitionService  samples/${PLATFORM_NAME}/VoiceRecognitionService
+development/apps/WidgetPreview               samples/${PLATFORM_NAME}/WidgetPreview
 development/samples/Wiktionary               samples/${PLATFORM_NAME}/Wiktionary
 development/samples/WiktionarySimple         samples/${PLATFORM_NAME}/WiktionarySimple
 development/samples/XmlAdapters              samples/${PLATFORM_NAME}/XmlAdapters