M7350v1_en_gpl

base/packages/SystemUI/src/com/android/systemui/usb/StorageNotification.java

@@ -0,0 +1,415 @@
+/*
+ * Copyright (C) 2010 Google Inc.
+ *
+ * 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.systemui.usb;
+
+import android.app.Notification;
+import android.app.NotificationManager;
+import android.app.PendingIntent;
+import android.content.Context;
+import android.content.Intent;
+import android.content.res.Resources;
+import android.os.Environment;
+import android.os.Handler;
+import android.os.HandlerThread;
+import android.os.storage.StorageEventListener;
+import android.os.storage.StorageManager;
+import android.provider.Settings;
+import android.util.Slog;
+
+public class StorageNotification extends StorageEventListener {
+    private static final String TAG = "StorageNotification";
+
+    private static final boolean POP_UMS_ACTIVITY_ON_CONNECT = true;
+
+    /**
+     * Binder context for this service
+     */
+    private Context mContext;
+    
+    /**
+     * The notification that is shown when a USB mass storage host
+     * is connected. 
+     * <p>
+     * This is lazily created, so use {@link #setUsbStorageNotification()}.
+     */
+    private Notification mUsbStorageNotification;
+
+    /**
+     * The notification that is shown when the following media events occur:
+     *     - Media is being checked
+     *     - Media is blank (or unknown filesystem)
+     *     - Media is corrupt
+     *     - Media is safe to unmount
+     *     - Media is missing
+     * <p>
+     * This is lazily created, so use {@link #setMediaStorageNotification()}.
+     */
+    private Notification   mMediaStorageNotification;
+    private boolean        mUmsAvailable;
+    private StorageManager mStorageManager;
+
+    private Handler        mAsyncEventHandler;
+
+    public StorageNotification(Context context) {
+        mContext = context;
+
+        mStorageManager = (StorageManager) context.getSystemService(Context.STORAGE_SERVICE);
+        final boolean connected = mStorageManager.isUsbMassStorageConnected();
+        Slog.d(TAG, String.format( "Startup with UMS connection %s (media state %s)", mUmsAvailable,
+                Environment.getExternalStorageState()));
+        
+        HandlerThread thr = new HandlerThread("SystemUI StorageNotification");
+        thr.start();
+        mAsyncEventHandler = new Handler(thr.getLooper());
+
+        onUsbMassStorageConnectionChanged(connected);
+    }
+
+    /*
+     * @override com.android.os.storage.StorageEventListener
+     */
+    @Override
+    public void onUsbMassStorageConnectionChanged(final boolean connected) {
+        mAsyncEventHandler.post(new Runnable() {
+            @Override
+            public void run() {
+                onUsbMassStorageConnectionChangedAsync(connected);
+            }
+        });
+    }
+
+    private void onUsbMassStorageConnectionChangedAsync(boolean connected) {
+        mUmsAvailable = connected;
+        /*
+         * Even though we may have a UMS host connected, we the SD card
+         * may not be in a state for export.
+         */
+        String st = Environment.getExternalStorageState();
+
+        Slog.i(TAG, String.format("UMS connection changed to %s (media state %s)", connected, st));
+
+        if (connected && (st.equals(
+                Environment.MEDIA_REMOVED) || st.equals(Environment.MEDIA_CHECKING))) {
+            /*
+             * No card or card being checked = don't display
+             */
+            connected = false;
+        }
+        updateUsbMassStorageNotification(connected);
+    }
+
+    /*
+     * @override com.android.os.storage.StorageEventListener
+     */
+    @Override
+    public void onStorageStateChanged(final String path, final String oldState, final String newState) {
+        mAsyncEventHandler.post(new Runnable() {
+            @Override
+            public void run() {
+                onStorageStateChangedAsync(path, oldState, newState);
+            }
+        });
+    }
+
+    private void onStorageStateChangedAsync(String path, String oldState, String newState) {
+        Slog.i(TAG, String.format(
+                "Media {%s} state changed from {%s} -> {%s}", path, oldState, newState));
+        if (newState.equals(Environment.MEDIA_SHARED)) {
+            /*
+             * Storage is now shared. Modify the UMS notification
+             * for stopping UMS.
+             */
+            Intent intent = new Intent();
+            intent.setClass(mContext, com.android.systemui.usb.UsbStorageActivity.class);
+            PendingIntent pi = PendingIntent.getActivity(mContext, 0, intent, 0);
+            setUsbStorageNotification(
+                    com.android.internal.R.string.usb_storage_stop_notification_title,
+                    com.android.internal.R.string.usb_storage_stop_notification_message,
+                    com.android.internal.R.drawable.stat_sys_warning, false, true, pi);
+        } else if (newState.equals(Environment.MEDIA_CHECKING)) {
+            /*
+             * Storage is now checking. Update media notification and disable
+             * UMS notification.
+             */
+            setMediaStorageNotification(
+                    com.android.internal.R.string.ext_media_checking_notification_title,
+                    com.android.internal.R.string.ext_media_checking_notification_message,
+                    com.android.internal.R.drawable.stat_notify_sdcard_prepare, true, false, null);
+            updateUsbMassStorageNotification(false);
+        } else if (newState.equals(Environment.MEDIA_MOUNTED)) {
+            /*
+             * Storage is now mounted. Dismiss any media notifications,
+             * and enable UMS notification if connected.
+             */
+            setMediaStorageNotification(0, 0, 0, false, false, null);
+            updateUsbMassStorageNotification(mUmsAvailable);
+        } else if (newState.equals(Environment.MEDIA_UNMOUNTED)) {
+            /*
+             * Storage is now unmounted. We may have been unmounted
+             * because the user is enabling/disabling UMS, in which case we don't
+             * want to display the 'safe to unmount' notification.
+             */
+            if (!mStorageManager.isUsbMassStorageEnabled()) {
+                if (oldState.equals(Environment.MEDIA_SHARED)) {
+                    /*
+                     * The unmount was due to UMS being enabled. Dismiss any
+                     * media notifications, and enable UMS notification if connected
+                     */
+                    setMediaStorageNotification(0, 0, 0, false, false, null);
+                    updateUsbMassStorageNotification(mUmsAvailable);
+                } else {
+                    /*
+                     * Show safe to unmount media notification, and enable UMS
+                     * notification if connected.
+                     */
+                    if (Environment.isExternalStorageRemovable()) {
+                        setMediaStorageNotification(
+                                com.android.internal.R.string.ext_media_safe_unmount_notification_title,
+                                com.android.internal.R.string.ext_media_safe_unmount_notification_message,
+                                com.android.internal.R.drawable.stat_notify_sdcard, true, true, null);
+                    } else {
+                        // This device does not have removable storage, so
+                        // don't tell the user they can remove it.
+                        setMediaStorageNotification(0, 0, 0, false, false, null);
+                    }
+                    updateUsbMassStorageNotification(mUmsAvailable);
+                }
+            } else {
+                /*
+                 * The unmount was due to UMS being enabled. Dismiss any
+                 * media notifications, and disable the UMS notification
+                 */
+                setMediaStorageNotification(0, 0, 0, false, false, null);
+                updateUsbMassStorageNotification(false);
+            }
+        } else if (newState.equals(Environment.MEDIA_NOFS)) {
+            /*
+             * Storage has no filesystem. Show blank media notification,
+             * and enable UMS notification if connected.
+             */
+            Intent intent = new Intent();
+            intent.setClass(mContext, com.android.internal.app.ExternalMediaFormatActivity.class);
+            PendingIntent pi = PendingIntent.getActivity(mContext, 0, intent, 0);
+
+            setMediaStorageNotification(
+                    com.android.internal.R.string.ext_media_nofs_notification_title,
+                    com.android.internal.R.string.ext_media_nofs_notification_message,
+                    com.android.internal.R.drawable.stat_notify_sdcard_usb, true, false, pi);
+            updateUsbMassStorageNotification(mUmsAvailable);
+        } else if (newState.equals(Environment.MEDIA_UNMOUNTABLE)) {
+            /*
+             * Storage is corrupt. Show corrupt media notification,
+             * and enable UMS notification if connected.
+             */
+            Intent intent = new Intent();
+            intent.setClass(mContext, com.android.internal.app.ExternalMediaFormatActivity.class);
+            PendingIntent pi = PendingIntent.getActivity(mContext, 0, intent, 0);
+
+            setMediaStorageNotification(
+                    com.android.internal.R.string.ext_media_unmountable_notification_title,
+                    com.android.internal.R.string.ext_media_unmountable_notification_message,
+                    com.android.internal.R.drawable.stat_notify_sdcard_usb, true, false, pi); 
+            updateUsbMassStorageNotification(mUmsAvailable);
+        } else if (newState.equals(Environment.MEDIA_REMOVED)) {
+            /*
+             * Storage has been removed. Show nomedia media notification,
+             * and disable UMS notification regardless of connection state.
+             */
+            setMediaStorageNotification(
+                    com.android.internal.R.string.ext_media_nomedia_notification_title,
+                    com.android.internal.R.string.ext_media_nomedia_notification_message,
+                    com.android.internal.R.drawable.stat_notify_sdcard_usb,
+                    true, false, null);
+            updateUsbMassStorageNotification(false);
+        } else if (newState.equals(Environment.MEDIA_BAD_REMOVAL)) {
+            /*
+             * Storage has been removed unsafely. Show bad removal media notification,
+             * and disable UMS notification regardless of connection state.
+             */
+            setMediaStorageNotification(
+                    com.android.internal.R.string.ext_media_badremoval_notification_title,
+                    com.android.internal.R.string.ext_media_badremoval_notification_message,
+                    com.android.internal.R.drawable.stat_sys_warning,
+                    true, true, null);
+            updateUsbMassStorageNotification(false);
+        } else {
+            Slog.w(TAG, String.format("Ignoring unknown state {%s}", newState));
+        }
+    }
+
+    /**
+     * Update the state of the USB mass storage notification
+     */
+    void updateUsbMassStorageNotification(boolean available) {
+
+        if (available) {
+            Intent intent = new Intent();
+            intent.setClass(mContext, com.android.systemui.usb.UsbStorageActivity.class);
+            intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
+
+            PendingIntent pi = PendingIntent.getActivity(mContext, 0, intent, 0);
+            setUsbStorageNotification(
+                    com.android.internal.R.string.usb_storage_notification_title,
+                    com.android.internal.R.string.usb_storage_notification_message,
+                    com.android.internal.R.drawable.stat_sys_data_usb,
+                    false, true, pi);
+        } else {
+            setUsbStorageNotification(0, 0, 0, false, false, null);
+        }
+    }
+
+    /**
+     * Sets the USB storage notification.
+     */
+    private synchronized void setUsbStorageNotification(int titleId, int messageId, int icon,
+            boolean sound, boolean visible, PendingIntent pi) {
+
+        if (!visible && mUsbStorageNotification == null) {
+            return;
+        }
+
+        NotificationManager notificationManager = (NotificationManager) mContext
+                .getSystemService(Context.NOTIFICATION_SERVICE);
+
+        if (notificationManager == null) {
+            return;
+        }
+        
+        if (visible) {
+            Resources r = Resources.getSystem();
+            CharSequence title = r.getText(titleId);
+            CharSequence message = r.getText(messageId);
+
+            if (mUsbStorageNotification == null) {
+                mUsbStorageNotification = new Notification();
+                mUsbStorageNotification.icon = icon;
+                mUsbStorageNotification.when = 0;
+            }
+
+            if (sound) {
+                mUsbStorageNotification.defaults |= Notification.DEFAULT_SOUND;
+            } else {
+                mUsbStorageNotification.defaults &= ~Notification.DEFAULT_SOUND;
+            }
+                
+            mUsbStorageNotification.flags = Notification.FLAG_ONGOING_EVENT;
+
+            mUsbStorageNotification.tickerText = title;
+            if (pi == null) {
+                Intent intent = new Intent();
+                pi = PendingIntent.getBroadcast(mContext, 0, intent, 0);
+            }
+
+            mUsbStorageNotification.setLatestEventInfo(mContext, title, message, pi);
+            final boolean adbOn = 1 == Settings.Secure.getInt(
+                mContext.getContentResolver(),
+                Settings.Secure.ADB_ENABLED,
+                0);
+
+            if (POP_UMS_ACTIVITY_ON_CONNECT && !adbOn) {
+                // Pop up a full-screen alert to coach the user through enabling UMS. The average
+                // user has attached the device to USB either to charge the phone (in which case
+                // this is harmless) or transfer files, and in the latter case this alert saves
+                // several steps (as well as subtly indicates that you shouldn't mix UMS with other
+                // activities on the device).
+                //
+                // If ADB is enabled, however, we suppress this dialog (under the assumption that a
+                // developer (a) knows how to enable UMS, and (b) is probably using USB to install
+                // builds or use adb commands.
+                mUsbStorageNotification.fullScreenIntent = pi;
+            }
+        }
+    
+        final int notificationId = mUsbStorageNotification.icon;
+        if (visible) {
+            notificationManager.notify(notificationId, mUsbStorageNotification);
+        } else {
+            notificationManager.cancel(notificationId);
+        }
+    }
+
+    private synchronized boolean getMediaStorageNotificationDismissable() {
+        if ((mMediaStorageNotification != null) &&
+            ((mMediaStorageNotification.flags & Notification.FLAG_AUTO_CANCEL) ==
+                    Notification.FLAG_AUTO_CANCEL))
+            return true;
+
+        return false;
+    }
+
+    /**
+     * Sets the media storage notification.
+     */
+    private synchronized void setMediaStorageNotification(int titleId, int messageId, int icon, boolean visible,
+                                                          boolean dismissable, PendingIntent pi) {
+
+        if (!visible && mMediaStorageNotification == null) {
+            return;
+        }
+
+        NotificationManager notificationManager = (NotificationManager) mContext
+                .getSystemService(Context.NOTIFICATION_SERVICE);
+
+        if (notificationManager == null) {
+            return;
+        }
+
+        if (mMediaStorageNotification != null && visible) {
+            /*
+             * Dismiss the previous notification - we're about to
+             * re-use it.
+             */
+            final int notificationId = mMediaStorageNotification.icon;
+            notificationManager.cancel(notificationId);
+        }
+        
+        if (visible) {
+            Resources r = Resources.getSystem();
+            CharSequence title = r.getText(titleId);
+            CharSequence message = r.getText(messageId);
+
+            if (mMediaStorageNotification == null) {
+                mMediaStorageNotification = new Notification();
+                mMediaStorageNotification.when = 0;
+            }
+
+            mMediaStorageNotification.defaults &= ~Notification.DEFAULT_SOUND;
+
+            if (dismissable) {
+                mMediaStorageNotification.flags = Notification.FLAG_AUTO_CANCEL;
+            } else {
+                mMediaStorageNotification.flags = Notification.FLAG_ONGOING_EVENT;
+            }
+
+            mMediaStorageNotification.tickerText = title;
+            if (pi == null) {
+                Intent intent = new Intent();
+                pi = PendingIntent.getBroadcast(mContext, 0, intent, 0);
+            }
+
+            mMediaStorageNotification.icon = icon;
+            mMediaStorageNotification.setLatestEventInfo(mContext, title, message, pi);
+        }
+    
+        final int notificationId = mMediaStorageNotification.icon;
+        if (visible) {
+            notificationManager.notify(notificationId, mMediaStorageNotification);
+        } else {
+            notificationManager.cancel(notificationId);
+        }
+    }
+}

base/packages/SystemUI/src/com/android/systemui/usb/UsbAccessoryUriActivity.java

@@ -0,0 +1,100 @@
+/*
+ * Copyright (C) 2011 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.systemui.usb;
+
+import android.app.Activity;
+import android.app.AlertDialog;
+import android.content.ActivityNotFoundException;
+import android.content.Context;
+import android.content.DialogInterface;
+import android.content.Intent;
+import android.net.Uri;
+import android.hardware.usb.UsbAccessory;
+import android.hardware.usb.UsbManager;
+import android.os.Bundle;
+import android.util.Log;
+
+import com.android.internal.app.AlertActivity;
+import com.android.internal.app.AlertController;
+
+import com.android.systemui.R;
+
+/**
+ * If the attached USB accessory has a URL associated with it, and that URL is valid,
+ * show this dialog to the user to allow them to optionally visit that URL for more
+ * information or software downloads.
+ * Otherwise (no valid URL) this activity does nothing at all, finishing immediately.
+ */
+public class UsbAccessoryUriActivity extends AlertActivity
+        implements DialogInterface.OnClickListener {
+
+    private static final String TAG = "UsbAccessoryUriActivity";
+
+    private UsbAccessory mAccessory;
+    private Uri mUri;
+
+    @Override
+    public void onCreate(Bundle icicle) {
+       super.onCreate(icicle);
+
+       Intent intent = getIntent();
+        mAccessory = (UsbAccessory)intent.getParcelableExtra(UsbManager.EXTRA_ACCESSORY);
+        String uriString = intent.getStringExtra("uri");
+        mUri = (uriString == null ? null : Uri.parse(uriString));
+
+        // sanity check before displaying dialog
+        if (mUri == null) {
+            Log.e(TAG, "could not parse Uri " + uriString);
+            finish();
+            return;
+        }
+        String scheme = mUri.getScheme();
+        if (!"http".equals(scheme) && !"https".equals(scheme)) {
+            Log.e(TAG, "Uri not http or https: " + mUri);
+            finish();
+            return;
+        }
+
+        final AlertController.AlertParams ap = mAlertParams;
+        ap.mTitle = mAccessory.getDescription();
+        if (ap.mTitle == null || ap.mTitle.length() == 0) {
+            ap.mTitle = getString(R.string.title_usb_accessory);
+        }
+        ap.mMessage = getString(R.string.usb_accessory_uri_prompt, mUri);
+        ap.mPositiveButtonText = getString(R.string.label_view);
+        ap.mNegativeButtonText = getString(android.R.string.cancel);
+        ap.mPositiveButtonListener = this;
+        ap.mNegativeButtonListener = this;
+
+        setupAlert();
+    }
+
+    public void onClick(DialogInterface dialog, int which) {
+        if (which == AlertDialog.BUTTON_POSITIVE) {
+            // launch the browser
+            Intent intent = new Intent(Intent.ACTION_VIEW, mUri);
+            intent.addCategory(Intent.CATEGORY_BROWSABLE);
+            intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
+            try {
+                startActivity(intent);
+            } catch (ActivityNotFoundException e) {
+                Log.e(TAG, "startActivity failed for " + mUri);
+            }
+        }
+        finish();
+    }
+}

base/packages/SystemUI/src/com/android/systemui/usb/UsbConfirmActivity.java

@@ -0,0 +1,143 @@
+/*
+ * Copyright (C) 2011 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.systemui.usb;
+
+import android.app.Activity;
+import android.app.AlertDialog;
+import android.content.ComponentName;
+import android.content.Context;
+import android.content.DialogInterface;
+import android.content.Intent;
+import android.content.pm.ApplicationInfo;
+import android.content.pm.PackageManager;
+import android.content.pm.ResolveInfo;
+import android.hardware.usb.IUsbManager;
+import android.hardware.usb.UsbAccessory;
+import android.hardware.usb.UsbManager;
+import android.os.Bundle;
+import android.os.IBinder;
+import android.os.RemoteException;
+import android.os.ServiceManager;
+import android.util.Log;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.widget.CheckBox;
+import android.widget.CompoundButton;
+import android.widget.TextView;
+
+import com.android.internal.app.AlertActivity;
+import com.android.internal.app.AlertController;
+
+import com.android.systemui.R;
+
+public class UsbConfirmActivity extends AlertActivity
+        implements DialogInterface.OnClickListener, CheckBox.OnCheckedChangeListener {
+
+    private static final String TAG = "UsbConfirmActivity";
+
+    private CheckBox mAlwaysUse;
+    private TextView mClearDefaultHint;
+    private UsbAccessory mAccessory;
+    private ResolveInfo mResolveInfo;
+    private boolean mPermissionGranted;
+    private UsbDisconnectedReceiver mDisconnectedReceiver;
+
+    @Override
+    public void onCreate(Bundle icicle) {
+        super.onCreate(icicle);
+
+        Intent intent = getIntent();
+        mAccessory = (UsbAccessory)intent.getParcelableExtra(UsbManager.EXTRA_ACCESSORY);
+        mDisconnectedReceiver = new UsbDisconnectedReceiver(this, mAccessory);
+        mResolveInfo = (ResolveInfo)intent.getParcelableExtra("rinfo");
+
+        PackageManager packageManager = getPackageManager();
+        String appName = mResolveInfo.loadLabel(packageManager).toString();
+
+        final AlertController.AlertParams ap = mAlertParams;
+        ap.mIcon = mResolveInfo.loadIcon(packageManager);
+        ap.mTitle = appName;
+        ap.mMessage = getString(R.string.usb_accessory_confirm_prompt, appName);
+        ap.mPositiveButtonText = getString(android.R.string.ok);
+        ap.mNegativeButtonText = getString(android.R.string.cancel);
+        ap.mPositiveButtonListener = this;
+        ap.mNegativeButtonListener = this;
+
+        // add "always use" checkbox
+        LayoutInflater inflater = (LayoutInflater)getSystemService(
+                Context.LAYOUT_INFLATER_SERVICE);
+        ap.mView = inflater.inflate(com.android.internal.R.layout.always_use_checkbox, null);
+        mAlwaysUse = (CheckBox)ap.mView.findViewById(com.android.internal.R.id.alwaysUse);
+        mAlwaysUse.setText(R.string.always_use_accessory);
+        mAlwaysUse.setOnCheckedChangeListener(this);
+        mClearDefaultHint = (TextView)ap.mView.findViewById(
+                                                    com.android.internal.R.id.clearDefaultHint);
+        mClearDefaultHint.setVisibility(View.GONE);
+
+        setupAlert();
+
+    }
+
+    @Override
+    protected void onDestroy() {
+        if (mDisconnectedReceiver != null) {
+            unregisterReceiver(mDisconnectedReceiver);
+        }
+        super.onDestroy();
+    }
+
+    public void onClick(DialogInterface dialog, int which) {
+        if (which == AlertDialog.BUTTON_POSITIVE) {
+            try {
+                IBinder b = ServiceManager.getService(USB_SERVICE);
+                IUsbManager service = IUsbManager.Stub.asInterface(b);
+                int uid = mResolveInfo.activityInfo.applicationInfo.uid;
+                boolean alwaysUse = mAlwaysUse.isChecked();
+                Intent intent = new Intent(UsbManager.ACTION_USB_ACCESSORY_ATTACHED);
+                intent.putExtra(UsbManager.EXTRA_ACCESSORY, mAccessory);
+                intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
+                intent.setComponent(
+                    new ComponentName(mResolveInfo.activityInfo.packageName,
+                            mResolveInfo.activityInfo.name));
+
+                // grant permission for the accessory
+                service.grantAccessoryPermission(mAccessory, uid);
+                // set or clear default setting
+                if (alwaysUse) {
+                    service.setAccessoryPackage(mAccessory,
+                            mResolveInfo.activityInfo.packageName);
+                } else {
+                    service.setAccessoryPackage(mAccessory, null);
+                }
+                startActivity(intent);
+            } catch (Exception e) {
+                Log.e(TAG, "Unable to start activity", e);
+            }
+        }
+        finish();
+    }
+
+    public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
+        if (mClearDefaultHint == null) return;
+
+        if(isChecked) {
+            mClearDefaultHint.setVisibility(View.VISIBLE);
+        } else {
+            mClearDefaultHint.setVisibility(View.GONE);
+        }
+    }
+}

base/packages/SystemUI/src/com/android/systemui/usb/UsbDisconnectedReceiver.java

@@ -0,0 +1,52 @@
+/*
+ * 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.systemui.usb;
+
+import android.app.Activity;
+import android.content.BroadcastReceiver;
+import android.content.Context;
+import android.content.Intent;
+import android.content.IntentFilter;
+import android.hardware.usb.UsbAccessory;
+import android.hardware.usb.UsbManager;
+
+// This class is used to close UsbPermissionsActivity and UsbResolverActivity
+// if their accessory is disconnected while the dialog is still open
+class UsbDisconnectedReceiver extends BroadcastReceiver {
+    private final Activity mActivity;
+    private UsbAccessory mAccessory;
+
+    public UsbDisconnectedReceiver(Activity activity, UsbAccessory accessory) {
+        mActivity = activity;
+        mAccessory = accessory;
+
+        IntentFilter filter = new IntentFilter(UsbManager.ACTION_USB_ACCESSORY_DETACHED);
+        activity.registerReceiver(this, filter);
+    }
+
+    @Override
+    public void onReceive(Context context, Intent intent) {
+        String action = intent.getAction();
+        if (UsbManager.ACTION_USB_ACCESSORY_DETACHED.equals(action)) {
+            UsbAccessory accessory =
+                    (UsbAccessory)intent.getParcelableExtra(UsbManager.EXTRA_ACCESSORY);
+            if (accessory != null && accessory.equals(mAccessory)) {
+                mActivity.finish();
+            }
+        }
+    }
+}

base/packages/SystemUI/src/com/android/systemui/usb/UsbPermissionActivity.java

@@ -0,0 +1,153 @@
+/*
+ * Copyright (C) 2011 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.systemui.usb;
+
+import android.app.Activity;
+import android.app.AlertDialog;
+import android.app.PendingIntent;
+import android.content.Context;
+import android.content.DialogInterface;
+import android.content.Intent;
+import android.content.pm.ApplicationInfo;
+import android.content.pm.PackageManager;
+import android.hardware.usb.IUsbManager;
+import android.hardware.usb.UsbAccessory;
+import android.hardware.usb.UsbManager;
+import android.os.Bundle;
+import android.os.IBinder;
+import android.os.RemoteException;
+import android.os.ServiceManager;
+import android.util.Log;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.widget.CheckBox;
+import android.widget.CompoundButton;
+import android.widget.TextView;
+
+import com.android.internal.app.AlertActivity;
+import com.android.internal.app.AlertController;
+
+import com.android.systemui.R;
+
+public class UsbPermissionActivity extends AlertActivity
+        implements DialogInterface.OnClickListener, CheckBox.OnCheckedChangeListener {
+
+    private static final String TAG = "UsbPermissionActivity";
+
+    private CheckBox mAlwaysUse;
+    private TextView mClearDefaultHint;
+    private UsbAccessory mAccessory;
+    private PendingIntent mPendingIntent;
+    private String mPackageName;
+    private int mUid;
+    private boolean mPermissionGranted;
+    private UsbDisconnectedReceiver mDisconnectedReceiver;
+
+    @Override
+    public void onCreate(Bundle icicle) {
+        super.onCreate(icicle);
+
+        Intent intent = getIntent();
+        mAccessory = (UsbAccessory)intent.getParcelableExtra(UsbManager.EXTRA_ACCESSORY);
+        mDisconnectedReceiver = new UsbDisconnectedReceiver(this, mAccessory);
+        mPendingIntent = (PendingIntent)intent.getParcelableExtra(Intent.EXTRA_INTENT);
+        mUid = intent.getIntExtra("uid", 0);
+        mPackageName = intent.getStringExtra("package");
+
+        PackageManager packageManager = getPackageManager();
+        ApplicationInfo aInfo;
+        try {
+            aInfo = packageManager.getApplicationInfo(mPackageName, 0);
+        } catch (PackageManager.NameNotFoundException e) {
+            Log.e(TAG, "unable to look up package name", e);
+            finish();
+            return;
+        }
+        String appName = aInfo.loadLabel(packageManager).toString();
+
+        final AlertController.AlertParams ap = mAlertParams;
+        ap.mIcon = aInfo.loadIcon(packageManager);
+        ap.mTitle = appName;
+        ap.mMessage = getString(R.string.usb_accessory_permission_prompt, appName);
+        ap.mPositiveButtonText = getString(android.R.string.ok);
+        ap.mNegativeButtonText = getString(android.R.string.cancel);
+        ap.mPositiveButtonListener = this;
+        ap.mNegativeButtonListener = this;
+
+        // add "always use" checkbox
+        LayoutInflater inflater = (LayoutInflater)getSystemService(
+                Context.LAYOUT_INFLATER_SERVICE);
+        ap.mView = inflater.inflate(com.android.internal.R.layout.always_use_checkbox, null);
+        mAlwaysUse = (CheckBox)ap.mView.findViewById(com.android.internal.R.id.alwaysUse);
+        mAlwaysUse.setText(R.string.always_use_accessory);
+        mAlwaysUse.setOnCheckedChangeListener(this);
+        mClearDefaultHint = (TextView)ap.mView.findViewById(
+                                                    com.android.internal.R.id.clearDefaultHint);
+        mClearDefaultHint.setVisibility(View.GONE);
+
+        setupAlert();
+
+    }
+
+    @Override
+    public void onDestroy() {
+        IBinder b = ServiceManager.getService(USB_SERVICE);
+        IUsbManager service = IUsbManager.Stub.asInterface(b);
+
+        // send response via pending intent
+        Intent intent = new Intent();
+        try {
+            if (mAccessory != null) {
+                intent.putExtra(UsbManager.EXTRA_ACCESSORY, mAccessory);
+                if (mPermissionGranted) {
+                    service.grantAccessoryPermission(mAccessory, mUid);
+                    if (mAlwaysUse.isChecked()) {
+                        service.setAccessoryPackage(mAccessory, mPackageName);
+                    }
+                }
+            }
+            intent.putExtra(UsbManager.EXTRA_PERMISSION_GRANTED, mPermissionGranted);
+            mPendingIntent.send(this, 0, intent);
+        } catch (PendingIntent.CanceledException e) {
+            Log.w(TAG, "PendingIntent was cancelled");
+        } catch (RemoteException e) {
+            Log.e(TAG, "IUsbService connection failed", e);
+        }
+
+        if (mDisconnectedReceiver != null) {
+            unregisterReceiver(mDisconnectedReceiver);
+        }
+        super.onDestroy();
+    }
+
+    public void onClick(DialogInterface dialog, int which) {
+        if (which == AlertDialog.BUTTON_POSITIVE) {
+            mPermissionGranted = true;
+        }
+        finish();
+    }
+
+    public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
+        if (mClearDefaultHint == null) return;
+
+        if(isChecked) {
+            mClearDefaultHint.setVisibility(View.VISIBLE);
+        } else {
+            mClearDefaultHint.setVisibility(View.GONE);
+        }
+    }
+}

base/packages/SystemUI/src/com/android/systemui/usb/UsbResolverActivity.java

@@ -0,0 +1,108 @@
+/*
+ * Copyright (C) 2011 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.systemui.usb;
+
+import com.android.internal.app.ResolverActivity;
+
+import android.content.ActivityNotFoundException;
+import android.content.Intent;
+import android.content.pm.ResolveInfo;
+import android.hardware.usb.IUsbManager;
+import android.hardware.usb.UsbAccessory;
+import android.hardware.usb.UsbManager;
+import android.os.Bundle;
+import android.os.IBinder;
+import android.os.Parcelable;
+import android.os.RemoteException;
+import android.os.ServiceManager;
+import android.util.Log;
+import android.widget.CheckBox;
+
+import com.android.systemui.R;
+
+import java.util.ArrayList;
+
+/* Activity for choosing an application for a USB device or accessory */
+public class UsbResolverActivity extends ResolverActivity {
+    public static final String TAG = "UsbResolverActivity";
+    public static final String EXTRA_RESOLVE_INFOS = "rlist";
+
+    private UsbAccessory mAccessory;
+    private UsbDisconnectedReceiver mDisconnectedReceiver;
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        Intent intent = getIntent();
+        Parcelable targetParcelable = intent.getParcelableExtra(Intent.EXTRA_INTENT);
+        if (!(targetParcelable instanceof Intent)) {
+            Log.w("UsbResolverActivity", "Target is not an intent: " + targetParcelable);
+            finish();
+            return;
+        }
+        Intent target = (Intent)targetParcelable;
+        ArrayList<ResolveInfo> rList = intent.getParcelableArrayListExtra(EXTRA_RESOLVE_INFOS);
+        CharSequence title = getResources().getText(com.android.internal.R.string.chooseUsbActivity);
+        super.onCreate(savedInstanceState, target, title, null, rList,
+                true /* Set alwaysUseOption to true to enable "always use this app" checkbox. */ );
+
+        CheckBox alwaysUse = (CheckBox)findViewById(com.android.internal.R.id.alwaysUse);
+        if (alwaysUse != null) {
+            alwaysUse.setText(R.string.always_use_accessory);
+        }
+
+        mAccessory = (UsbAccessory)target.getParcelableExtra(UsbManager.EXTRA_ACCESSORY);
+        if (mAccessory == null) {
+            Log.e(TAG, "accessory is null");
+            finish();
+            return;
+        }
+        mDisconnectedReceiver = new UsbDisconnectedReceiver(this, mAccessory);
+    }
+
+    @Override
+    protected void onDestroy() {
+        if (mDisconnectedReceiver != null) {
+            unregisterReceiver(mDisconnectedReceiver);
+        }
+        super.onDestroy();
+    }
+
+    protected void onIntentSelected(ResolveInfo ri, Intent intent, boolean alwaysCheck) {
+        try {
+            IBinder b = ServiceManager.getService(USB_SERVICE);
+            IUsbManager service = IUsbManager.Stub.asInterface(b);
+            int uid = ri.activityInfo.applicationInfo.uid;
+
+            // grant permission for the accessory
+            service.grantAccessoryPermission(mAccessory, uid);
+            // set or clear default setting
+            if (alwaysCheck) {
+                service.setAccessoryPackage(mAccessory, ri.activityInfo.packageName);
+            } else {
+                service.setAccessoryPackage(mAccessory, null);
+            }
+
+            try {
+                startActivity(intent);
+            } catch (ActivityNotFoundException e) {
+                Log.e(TAG, "startActivity failed", e);
+            }
+        } catch (RemoteException e) {
+            Log.e(TAG, "onIntentSelected failed", e);
+        }
+    }
+}

base/packages/SystemUI/src/com/android/systemui/usb/UsbStorageActivity.java

@@ -0,0 +1,346 @@
+/*
+ * Copyright (C) 2007 Google Inc.
+ *
+ * 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.systemui.usb;
+
+import com.android.internal.R;
+import android.app.Activity;
+import android.app.ActivityManager;
+import android.app.AlertDialog;
+import android.app.Dialog;
+import android.content.BroadcastReceiver;
+import android.content.Context;
+import android.content.DialogInterface;
+import android.content.Intent;
+import android.content.IntentFilter;
+import android.content.DialogInterface.OnCancelListener;
+import android.content.pm.ApplicationInfo;
+import android.content.pm.PackageManager;
+import android.content.pm.PackageManager.NameNotFoundException;
+import android.hardware.usb.UsbManager;
+import android.os.Bundle;
+import android.os.Environment;
+import android.os.Handler;
+import android.os.HandlerThread;
+import android.os.IBinder;
+import android.os.storage.IMountService;
+import android.os.storage.StorageManager;
+import android.os.storage.StorageEventListener;
+import android.os.SystemProperties;
+import android.os.RemoteException;
+import android.os.ServiceManager;
+import android.widget.ImageView;
+import android.widget.Button;
+import android.widget.ProgressBar;
+import android.widget.TextView;
+import android.view.View;
+import android.view.Window;
+import android.view.WindowManager;
+import android.util.Log;
+
+import java.util.List;
+
+/**
+ * This activity is shown to the user for him/her to enable USB mass storage
+ * on-demand (that is, when the USB cable is connected). It uses the alert
+ * dialog style. It will be launched from a notification.
+ */
+public class UsbStorageActivity extends Activity
+        implements View.OnClickListener, OnCancelListener {
+    private static final String TAG = "UsbStorageActivity";
+
+    private Button mMountButton;
+    private Button mUnmountButton;
+    private ProgressBar mProgressBar;
+    private TextView mBanner;
+    private TextView mMessage;
+    private ImageView mIcon;
+    private StorageManager mStorageManager = null;
+    private static final int DLG_CONFIRM_KILL_STORAGE_USERS = 1;
+    private static final int DLG_ERROR_SHARING = 2;
+    static final boolean localLOGV = false;
+    private boolean mDestroyed;
+
+    // UI thread
+    private Handler mUIHandler;
+
+    // thread for working with the storage services, which can be slow
+    private Handler mAsyncStorageHandler;
+
+    /** Used to detect when the USB cable is unplugged, so we can call finish() */
+    private BroadcastReceiver mUsbStateReceiver = new BroadcastReceiver() {
+        @Override
+        public void onReceive(Context context, Intent intent) {
+            if (intent.getAction().equals(UsbManager.ACTION_USB_STATE)) {
+                handleUsbStateChanged(intent);
+            }
+        }
+    };
+
+    private StorageEventListener mStorageListener = new StorageEventListener() {
+        @Override
+        public void onStorageStateChanged(String path, String oldState, String newState) {
+            final boolean on = newState.equals(Environment.MEDIA_SHARED);
+            switchDisplay(on);
+        }
+    };
+    
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+
+        if (mStorageManager == null) {
+            mStorageManager = (StorageManager) getSystemService(Context.STORAGE_SERVICE);
+            if (mStorageManager == null) {
+                Log.w(TAG, "Failed to get StorageManager");
+            }
+        }
+        
+        mUIHandler = new Handler();
+
+        HandlerThread thr = new HandlerThread("SystemUI UsbStorageActivity");
+        thr.start();
+        mAsyncStorageHandler = new Handler(thr.getLooper());
+
+        requestWindowFeature(Window.FEATURE_INDETERMINATE_PROGRESS);
+        setProgressBarIndeterminateVisibility(true);
+
+        getWindow().addFlags(WindowManager.LayoutParams.FLAG_DISMISS_KEYGUARD);
+        if (Environment.isExternalStorageRemovable()) {
+            getWindow().addFlags(WindowManager.LayoutParams.FLAG_SHOW_WHEN_LOCKED);
+        }
+
+        setTitle(getString(com.android.internal.R.string.usb_storage_activity_title));
+
+        setContentView(com.android.internal.R.layout.usb_storage_activity);
+
+        mIcon = (ImageView) findViewById(com.android.internal.R.id.icon);
+        mBanner = (TextView) findViewById(com.android.internal.R.id.banner);
+        mMessage = (TextView) findViewById(com.android.internal.R.id.message);
+
+        mMountButton = (Button) findViewById(com.android.internal.R.id.mount_button);
+        mMountButton.setOnClickListener(this);
+        mUnmountButton = (Button) findViewById(com.android.internal.R.id.unmount_button);
+        mUnmountButton.setOnClickListener(this);
+        mProgressBar = (ProgressBar) findViewById(com.android.internal.R.id.progress);
+    }
+
+    @Override
+    protected void onDestroy() {
+        super.onDestroy();
+        mDestroyed = true;
+    }
+
+    private void switchDisplay(final boolean usbStorageInUse) {
+        mUIHandler.post(new Runnable() {
+            @Override
+            public void run() {
+                switchDisplayAsync(usbStorageInUse);
+            }
+        });
+    }
+
+    private void switchDisplayAsync(boolean usbStorageInUse) {
+        if (usbStorageInUse) {
+            mProgressBar.setVisibility(View.GONE);
+            mUnmountButton.setVisibility(View.VISIBLE);
+            mMountButton.setVisibility(View.GONE);
+            mIcon.setImageResource(com.android.internal.R.drawable.usb_android_connected);
+            mBanner.setText(com.android.internal.R.string.usb_storage_stop_title);
+            mMessage.setText(com.android.internal.R.string.usb_storage_stop_message);
+        } else {
+            mProgressBar.setVisibility(View.GONE);
+            mUnmountButton.setVisibility(View.GONE);
+            mMountButton.setVisibility(View.VISIBLE);
+            mIcon.setImageResource(com.android.internal.R.drawable.usb_android);
+            mBanner.setText(com.android.internal.R.string.usb_storage_title);
+            mMessage.setText(com.android.internal.R.string.usb_storage_message);
+        }
+    }
+
+    @Override
+    protected void onResume() {
+        super.onResume();
+
+        mStorageManager.registerListener(mStorageListener);
+        registerReceiver(mUsbStateReceiver, new IntentFilter(UsbManager.ACTION_USB_STATE));
+        try {
+            mAsyncStorageHandler.post(new Runnable() {
+                @Override
+                public void run() {
+                    switchDisplay(mStorageManager.isUsbMassStorageEnabled());
+                }
+            });
+        } catch (Exception ex) {
+            Log.e(TAG, "Failed to read UMS enable state", ex);
+        }
+    }
+
+    @Override
+    protected void onPause() {
+        super.onPause();
+        
+        unregisterReceiver(mUsbStateReceiver);
+        if (mStorageManager == null && mStorageListener != null) {
+            mStorageManager.unregisterListener(mStorageListener);
+        }
+    }
+
+    private void handleUsbStateChanged(Intent intent) {
+        boolean connected = intent.getExtras().getBoolean(UsbManager.USB_CONNECTED);
+        if (!connected) {
+            // It was disconnected from the plug, so finish
+            finish();
+        }
+    }
+
+    private IMountService getMountService() {
+        IBinder service = ServiceManager.getService("mount");
+        if (service != null) {
+            return IMountService.Stub.asInterface(service);
+        }
+        return null;
+    }
+
+    @Override
+    public Dialog onCreateDialog(int id, Bundle args) {
+        switch (id) {
+        case DLG_CONFIRM_KILL_STORAGE_USERS:
+            return new AlertDialog.Builder(this)
+                    .setTitle(R.string.dlg_confirm_kill_storage_users_title)
+                    .setPositiveButton(R.string.dlg_ok, new DialogInterface.OnClickListener() {
+                        public void onClick(DialogInterface dialog, int which) {
+                            switchUsbMassStorage(true);
+                        }})
+                    .setNegativeButton(R.string.cancel, null)
+                    .setMessage(R.string.dlg_confirm_kill_storage_users_text)
+                    .setOnCancelListener(this)
+                    .create();
+        case DLG_ERROR_SHARING:
+            return new AlertDialog.Builder(this)
+                    .setTitle(R.string.dlg_error_title)
+                    .setNeutralButton(R.string.dlg_ok, null)
+                    .setMessage(R.string.usb_storage_error_message)
+                    .setOnCancelListener(this)
+                    .create();
+        }
+        return null;
+    }
+
+    private void scheduleShowDialog(final int id) {
+        mUIHandler.post(new Runnable() {
+            @Override
+            public void run() {
+                if (!mDestroyed) {
+                    removeDialog(id);
+                    showDialog(id);
+                }
+            }
+        });
+    }
+
+    private void switchUsbMassStorage(final boolean on) {
+
+	if(SystemProperties.getBoolean("ro.monkey", false)) {
+	    Log.d(TAG,"Monkey Running: Switching to UsbMassStorage disabled");
+            return;
+        }
+
+        // things to do on the UI thread
+        mUIHandler.post(new Runnable() {
+            @Override
+            public void run() {
+                mUnmountButton.setVisibility(View.GONE);
+                mMountButton.setVisibility(View.GONE);
+
+                mProgressBar.setVisibility(View.VISIBLE);
+                // will be hidden once USB mass storage kicks in (or fails)
+            }
+        });
+        
+        // things to do elsewhere
+        mAsyncStorageHandler.post(new Runnable() {
+            @Override
+            public void run() {
+                if (on) {
+                    mStorageManager.enableUsbMassStorage();
+                } else {
+                    mStorageManager.disableUsbMassStorage();
+                }
+            }
+        });
+    }
+
+    private void checkStorageUsers() {
+        mAsyncStorageHandler.post(new Runnable() {
+            @Override
+            public void run() {
+                checkStorageUsersAsync();
+            }
+        });
+    }
+
+    private void checkStorageUsersAsync() {
+        IMountService ims = getMountService();
+        if (ims == null) {
+            // Display error dialog
+            scheduleShowDialog(DLG_ERROR_SHARING);
+        }
+        String extStoragePath = Environment.getExternalStorageDirectory().toString();
+        boolean showDialog = false;
+        try {
+            int[] stUsers = ims.getStorageUsers(extStoragePath);
+            if (stUsers != null && stUsers.length > 0) {
+                showDialog = true;
+            } else {
+                // List of applications on sdcard.
+                ActivityManager am = (ActivityManager)getSystemService(Context.ACTIVITY_SERVICE);
+                List<ApplicationInfo> infoList = am.getRunningExternalApplications();
+                if (infoList != null && infoList.size() > 0) {
+                    showDialog = true;
+                }
+            }
+        } catch (RemoteException e) {
+            // Display error dialog
+            scheduleShowDialog(DLG_ERROR_SHARING);
+        }
+        if (showDialog) {
+            // Display dialog to user
+            scheduleShowDialog(DLG_CONFIRM_KILL_STORAGE_USERS);
+        } else {
+            if (localLOGV) Log.i(TAG, "Enabling UMS");
+            switchUsbMassStorage(true);
+        }
+    }
+
+    public void onClick(View v) {
+        if (v == mMountButton) {
+            // notify MountService about changing volume state to shared
+            mStorageManager.setShared(true);
+            // Check for list of storage users and display dialog if needed.
+            checkStorageUsers();
+        } else if (v == mUnmountButton) {
+            mStorageManager.setShared(false);
+            if (localLOGV) Log.i(TAG, "Disabling UMS");
+            switchUsbMassStorage(false);
+        }
+    }
+
+    public void onCancel(DialogInterface dialog) {
+        finish();
+    }
+
+}