Added option to have attachments store on sd card

(this is still a rough implementation)

res/values/strings.xml

@@ -655,4 +655,10 @@ Welcome to K-9 Mail setup.  K-9 is an open source mail client for Android origin
 
     <string name="remote_control_label">K-9 Mail remote control</string>
     <string name="remote_control_desc">Allows this application to control K-9 Mail activities and settings.</string>
+
+    <string name="account_setup_store_attachment_on_sd_card_label">Attachments On SD Cards</string>
+    <string name="account_setup_store_attachment_on_sd_card_summary">Whether or not attachments are store on the SD card</string>
+    <string name="account_setup_store_attachment_on_sd_card_error">No SD card found</string>
+
+    <string name="sd_card_error">No SD card found</string>
 </resources>

res/xml/account_settings_preferences.xml

@@ -30,9 +30,16 @@
             android:key="account_default"
             android:title="@string/account_settings_default_label"
             android:summary="@string/account_settings_default_summary" />
-	   	</PreferenceCategory>
 
-		<PreferenceCategory android:title="@string/account_settings_message_lists">
+        <CheckBoxPreference
+            android:key="account_setup_store_attachment_on_sd_card"
+            android:title="@string/account_setup_store_attachment_on_sd_card_label"
+            android:summary="@string/account_setup_store_attachment_on_sd_card_summary" />
+
+    </PreferenceCategory>
+
+	
+	<PreferenceCategory android:title="@string/account_settings_message_lists">
 
         <ListPreference
             android:key="account_display_count"
@@ -40,9 +47,9 @@
             android:entries="@array/account_settings_display_count_entries"
             android:entryValues="@array/account_settings_display_count_values"
             android:dialogTitle="@string/account_settings_mail_display_count_label" />
-	   	</PreferenceCategory>
+    </PreferenceCategory>
 
-		<PreferenceCategory android:title="@string/account_settings_message_view">
+    <PreferenceCategory android:title="@string/account_settings_message_view">
 
        <ListPreference
             android:key="hide_buttons_enum"
@@ -51,9 +58,9 @@
             android:entryValues="@array/account_settings_hide_buttons_values"
             android:dialogTitle="@string/account_settings_hide_buttons_label" />
 
-	   	</PreferenceCategory>
+    </PreferenceCategory>
 
-		<PreferenceCategory android:title="@string/account_settings_sync">
+    <PreferenceCategory android:title="@string/account_settings_sync">
         <ListPreference
             android:key="account_check_frequency"
             android:title="@string/account_settings_mail_check_frequency_label"
@@ -102,7 +109,7 @@
 			android:summary="@string/account_settings_incoming_summary"
 			/>
 
-	   	</PreferenceCategory>
+    </PreferenceCategory>
 	
 	<PreferenceCategory android:title="@string/account_settings_folders">
 

src/com/fsck/k9/Account.java

@@ -60,10 +60,11 @@ public class Account implements Serializable
     boolean mIsSignatureBeforeQuotedText;
     private String mExpungePolicy = EXPUNGE_IMMEDIATELY;
     private int mMaxPushFolders;
+    private boolean mStoreAttachmentsOnSdCard;
 
     List<Identity> identities;
 
-    public enum FolderMode
+     public enum FolderMode
     {
         NONE, ALL, FIRST_CLASS, FIRST_AND_SECOND_CLASS, NOT_SECOND_CLASS;
     }
@@ -274,7 +275,6 @@ public class Account implements Serializable
             mFolderPushMode = FolderMode.FIRST_CLASS;
         }
 
-
         try
         {
             mFolderTargetMode = FolderMode.valueOf(preferences.getPreferences().getString(mUuid  + ".folderTargetMode",
@@ -286,6 +286,7 @@ public class Account implements Serializable
         }
 
         mIsSignatureBeforeQuotedText = preferences.getPreferences().getBoolean(mUuid  + ".signatureBeforeQuotedText", false);
+        mStoreAttachmentsOnSdCard = preferences.getPreferences().getBoolean(mUuid  + ".storeAttachmentOnSdCard", true);
         identities = loadIdentities(preferences.getPreferences());
     }
 
@@ -530,6 +531,7 @@ public class Account implements Serializable
         editor.remove(mUuid + ".signatureBeforeQuotedText");
         editor.remove(mUuid + ".expungePolicy");
         editor.remove(mUuid + ".maxPushFolders");
+        editor.remove(mUuid + ".storeAttachmentOnSdCard");
         deleteIdentities(preferences.getPreferences(), editor);
         editor.commit();
     }
@@ -602,6 +604,7 @@ public class Account implements Serializable
         editor.putBoolean(mUuid + ".signatureBeforeQuotedText", this.mIsSignatureBeforeQuotedText);
         editor.putString(mUuid + ".expungePolicy", mExpungePolicy);
         editor.putInt(mUuid + ".maxPushFolders", mMaxPushFolders);
+        editor.putBoolean(mUuid + ".storeAttachmentOnSdCard", mStoreAttachmentsOnSdCard);
         saveIdentities(preferences.getPreferences(), editor);
 
         editor.commit();
@@ -965,4 +968,13 @@ public class Account implements Serializable
         mRing = ring;
     }
 
+    public boolean isStoreAttachmentOnSdCard()
+    {
+        return mStoreAttachmentsOnSdCard;
+    }
+
+    public void setStoreAttachmentOnSdCard(boolean mStoreAttachmentOnSdCard)
+    {
+        this.mStoreAttachmentsOnSdCard = mStoreAttachmentOnSdCard;
+    }
 }

src/com/fsck/k9/MessagingController.java

@@ -31,6 +31,7 @@ import android.app.PendingIntent;
 import android.content.Context;
 import android.content.Intent;
 import android.net.Uri;
+import android.os.Environment;
 import android.os.PowerManager;
 import android.os.Process;
 import android.os.PowerManager.WakeLock;
@@ -46,7 +47,6 @@ import com.fsck.k9.mail.Folder;
 import com.fsck.k9.mail.Message;
 import com.fsck.k9.mail.MessageRemovalListener;
 import com.fsck.k9.mail.MessageRetrievalListener;
-import com.fsck.k9.mail.MessagingException;
 import com.fsck.k9.mail.Part;
 import com.fsck.k9.mail.PushReceiver;
 import com.fsck.k9.mail.Pusher;
@@ -54,6 +54,7 @@ import com.fsck.k9.mail.Store;
 import com.fsck.k9.mail.Transport;
 import com.fsck.k9.mail.Folder.FolderType;
 import com.fsck.k9.mail.Folder.OpenMode;
+import com.fsck.k9.mail.MessagingException;
 import com.fsck.k9.mail.internet.MimeMessage;
 import com.fsck.k9.mail.internet.MimeUtility;
 import com.fsck.k9.mail.internet.TextBody;
@@ -61,6 +62,10 @@ import com.fsck.k9.mail.store.LocalStore;
 import com.fsck.k9.mail.store.LocalStore.LocalFolder;
 import com.fsck.k9.mail.store.LocalStore.LocalMessage;
 import com.fsck.k9.mail.store.LocalStore.PendingCommand;
+import com.fsck.k9.mail.transport.EOLConvertingOutputStream;
+import java.io.File;
+import java.io.FileOutputStream;
+import java.io.IOException;
 
 /**
  * Starts a long running (application) Thread that will run through commands
@@ -3858,13 +3863,19 @@ public class MessagingController implements Runnable
 
                     for (final Account account : accounts)
                     {
+                        if (account.isStoreAttachmentOnSdCard()
+                            && !Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED))
+                        {
+                            if (K9.DEBUG)
+                                Log.i(K9.LOG_TAG, "SD card not mounted: skipping synchronizing account " + account.getDescription());
+                            continue;
+                        }
+
                         final long accountInterval = account.getAutomaticCheckIntervalMinutes() * 60 * 1000;
                         if (ignoreLastCheckedTime == false && accountInterval <= 0)
                         {
                             if (K9.DEBUG)
                                 Log.i(K9.LOG_TAG, "Skipping synchronizing account " + account.getDescription());
-
-
                             continue;
                         }
 
@@ -3947,8 +3958,6 @@ public class MessagingController implements Runnable
                                     continue;
                                 }
 
-
-
                                 if (K9.DEBUG)
                                     Log.v(K9.LOG_TAG, "Folder " + folder.getName() + " was last synced @ " +
                                           new Date(folder.getLastChecked()));
@@ -3967,6 +3976,16 @@ public class MessagingController implements Runnable
                                 {
                                     public void run()
                                     {
+                                        //Let's be conservative and check the sd card
+                                        //in case it was unmounted while we are sync'ing this account
+                                        if (account.isStoreAttachmentOnSdCard()
+                                            && !Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED))
+                                        {
+                                            if (K9.DEBUG)
+                                                Log.i(K9.LOG_TAG, "SD card not mounted: skipping synchronizing: account " + account.getDescription() + " folder=" + folder.getName());
+                                            return;
+                                        }
+
                                         LocalFolder tLocalFolder = null;
                                         try
                                         {
@@ -4010,7 +4029,6 @@ public class MessagingController implements Runnable
                                             {
                                                 synchronizeMailboxSynchronous(account, folder.getName(), listener);
                                             }
-
                                             finally
                                             {
                                                 if (account.isShowOngoing())
@@ -4523,6 +4541,14 @@ public class MessagingController implements Runnable
         {
             public void run()
             {
+                if (account.isStoreAttachmentOnSdCard()
+                    && !Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED))
+                {
+                    if (K9.DEBUG)
+                        Log.i(K9.LOG_TAG, "SD card not mounted: skipping reception of pushed messages: account=" + account.getDescription() + ", folder=" + remoteFolder.getName() + ", message count=" + messages.size());
+                    return;
+                }
+
                 LocalFolder localFolder = null;
                 try
                 {

src/com/fsck/k9/activity/Accounts.java

@@ -9,6 +9,7 @@ import android.content.Intent;
 import android.content.pm.PackageInfo;
 import android.content.pm.PackageManager;
 import android.os.Bundle;
+import android.os.Environment;
 import android.os.Handler;
 import android.view.*;
 import android.view.ContextMenu.ContextMenuInfo;
@@ -377,6 +378,13 @@ public class Accounts extends K9ListActivity implements OnItemClickListener, OnC
 
     private void onCheckMail(Account account)
     {
+        if (account.isStoreAttachmentOnSdCard()
+            && !Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED))
+        {
+            Toast.makeText(this, R.string.sd_card_error, Toast.LENGTH_SHORT).show();
+            return;
+        }
+
         MessagingController.getInstance(getApplication()).checkMail(this, account, true, true, null);
     }
 

src/com/fsck/k9/activity/FolderList.java

@@ -8,6 +8,7 @@ import android.content.DialogInterface;
 import android.content.Intent;
 import android.net.Uri;
 import android.os.Bundle;
+import android.os.Environment;
 import android.os.Handler;
 import android.os.PowerManager;
 import android.os.PowerManager.WakeLock;
@@ -172,6 +173,13 @@ public class FolderList extends K9ListActivity
 
     private void checkMail(FolderInfoHolder folder)
     {
+        if (mAccount.isStoreAttachmentOnSdCard()
+            && !Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED))
+        {
+            Toast.makeText(this, R.string.sd_card_error, Toast.LENGTH_SHORT).show();
+            return;
+        }
+
         PowerManager pm = (PowerManager) getSystemService(Context.POWER_SERVICE);
         final WakeLock wakeLock = pm.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, "Email - UpdateWorker");
         wakeLock.setReferenceCounted(false);
@@ -447,6 +455,13 @@ public class FolderList extends K9ListActivity
 
     private void checkMail(final Account account)
     {
+        if (mAccount.isStoreAttachmentOnSdCard()
+            && !Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED))
+        {
+            Toast.makeText(this, R.string.sd_card_error, Toast.LENGTH_SHORT).show();
+            return;
+        }
+
         MessagingController.getInstance(getApplication()).checkMail(this, account, true, true, mAdapter.mListener);
     }
 

src/com/fsck/k9/activity/MessageList.java

@@ -10,11 +10,9 @@ import android.content.Intent;
 import android.graphics.Typeface;
 import android.graphics.drawable.Drawable;
 import android.os.Bundle;
+import android.os.Environment;
 import android.os.Handler;
-import android.text.SpannableString;
 import android.text.Spannable;
-import android.text.style.ForegroundColorSpan;
-import android.text.style.StyleSpan;
 import android.text.style.TextAppearanceSpan;
 import android.util.Config;
 import android.util.Log;
@@ -974,6 +972,13 @@ public class MessageList
 
     private void checkMail(Account account, String folderName)
     {
+        if (mAccount.isStoreAttachmentOnSdCard()
+            && !Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED))
+        {
+            Toast.makeText(this, R.string.sd_card_error, Toast.LENGTH_SHORT).show();
+            return;
+        }
+
         mController.synchronizeMailbox(account, folderName, mAdapter.mListener);
         sendMail(account);
     }

src/com/fsck/k9/activity/setup/AccountSettings.java

@@ -5,9 +5,12 @@ import android.content.Context;
 import android.content.Intent;
 import android.content.SharedPreferences;
 import android.os.Bundle;
+import android.os.Environment;
 import android.preference.*;
+import android.preference.Preference.OnPreferenceChangeListener;
 import android.util.Log;
 import android.view.KeyEvent;
+import android.widget.Toast;
 import com.fsck.k9.*;
 import com.fsck.k9.activity.ChooseFolder;
 import com.fsck.k9.activity.ChooseIdentity;
@@ -45,6 +48,7 @@ public class AccountSettings extends K9PreferenceActivity
     private static final String PREFERENCE_DELETE_POLICY = "delete_policy";
     private static final String PREFERENCE_EXPUNGE_POLICY = "expunge_policy";
     private static final String PREFERENCE_AUTO_EXPAND_FOLDER = "account_setup_auto_expand_folder";
+    private static final String PREFERENCE_STORE_ATTACHMENTS_ON_SD_CARD = "account_setup_store_attachment_on_sd_card";
 
 
     private Account mAccount;
@@ -67,6 +71,7 @@ public class AccountSettings extends K9PreferenceActivity
     private ListPreference mDeletePolicy;
     private ListPreference mExpungePolicy;
     private Preference mAutoExpandFolder;
+    private CheckBoxPreference mStoreAttachmentsOnSdCard;
 
 
     public static void actionSettings(Context context, Account account)
@@ -349,6 +354,28 @@ public class AccountSettings extends K9PreferenceActivity
                 return true;
             }
         });
+
+        mStoreAttachmentsOnSdCard = (CheckBoxPreference) findPreference(PREFERENCE_STORE_ATTACHMENTS_ON_SD_CARD);
+        mStoreAttachmentsOnSdCard.setChecked(mAccount.isStoreAttachmentOnSdCard());
+        mStoreAttachmentsOnSdCard.setOnPreferenceChangeListener(new OnPreferenceChangeListener() {
+            public boolean onPreferenceChange(Preference preference, Object newValue) {
+                if (newValue instanceof Boolean) 
+                {
+                    Boolean b = (Boolean)newValue;
+                    if (b.booleanValue()
+                        && !Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED))
+                    {
+                        Toast.makeText(
+                            AccountSettings.this,
+                            R.string.account_setup_store_attachment_on_sd_card_error,
+                            Toast.LENGTH_SHORT).show();
+                        return false;
+                    }
+                }
+                return true;
+            }
+
+        });
     }
 
     @Override
@@ -378,6 +405,7 @@ public class AccountSettings extends K9PreferenceActivity
         mAccount.setFolderTargetMode(Account.FolderMode.valueOf(mTargetMode.getValue()));
         mAccount.setDeletePolicy(Integer.parseInt(mDeletePolicy.getValue()));
         mAccount.setExpungePolicy(mExpungePolicy.getValue());
+        mAccount.setStoreAttachmentOnSdCard(mStoreAttachmentsOnSdCard.isChecked());
 
         SharedPreferences prefs = mAccountRingtone.getPreferenceManager().getSharedPreferences();
         String newRingtone = prefs.getString(PREFERENCE_RINGTONE, null);

src/com/fsck/k9/mail/store/LocalStore.java

@@ -8,8 +8,10 @@ import android.database.Cursor;
 import android.database.sqlite.SQLiteDatabase;
 import android.database.sqlite.SQLiteException;
 import android.net.Uri;
+import android.os.Environment;
 import android.text.util.Regex;
 import android.util.Log;
+import com.fsck.k9.Account;
 import com.fsck.k9.K9;
 import com.fsck.k9.Preferences;
 import com.fsck.k9.Utility;
@@ -36,9 +38,11 @@ public class LocalStore extends Store implements Serializable
     private static final int DB_VERSION = 33;
     private static final Flag[] PERMANENT_FLAGS = { Flag.DELETED, Flag.X_DESTROYED, Flag.SEEN };
 
+    private Account mAccount;
     private String mPath;
     private SQLiteDatabase mDb;
-    private File mAttachmentsDir;
+    private File mInternalAttachmentsDir = null;
+    private File mExternalAttachmentsDir = null;
     private Application mApplication;
     private String uUid = null;
 
@@ -65,6 +69,24 @@ public class LocalStore extends Store implements Serializable
     public LocalStore(String _uri, Application application) throws MessagingException
     {
         mApplication = application;
+
+        //Store should be passed their store
+        //but let's not break the interface now
+        for (Account account : Preferences.getPreferences(mApplication).getAccounts())
+        {
+            if (_uri.equals(account.getLocalStoreUri()))
+            {
+                mAccount = account;
+                break;
+            }
+        }
+        if (mAccount == null)
+        {
+            //Should not happend
+            throw new IllegalArgumentException("No account found: uri=" + _uri);
+        }
+
+
         URI uri = null;
         try
         {
@@ -94,10 +116,20 @@ public class LocalStore extends Store implements Serializable
             parentDir.mkdirs();
         }
 
-        mAttachmentsDir = new File(mPath + "_att");
+        mInternalAttachmentsDir = new File(mPath + "_att");
-        if (!mAttachmentsDir.exists())
+        if (!mInternalAttachmentsDir.exists())
         {
-            mAttachmentsDir.mkdirs();
+            mInternalAttachmentsDir.mkdirs();
+        }
+
+        if (useExternalAttachmentDir())
+        {
+            String externalAttachmentsPath = "/sdcard" + mPath.substring("//data".length());
+            mExternalAttachmentsDir = new File(externalAttachmentsPath + "_att");
+            if (!mExternalAttachmentsDir.exists())
+            {
+                mExternalAttachmentsDir.mkdirs();
+            }
         }
 
         mDb = SQLiteDatabase.openOrCreateDatabase(mPath, null);
@@ -235,7 +267,21 @@ public class LocalStore extends Store implements Serializable
     {
         long attachmentLength = 0;
 
-        File[] files = mAttachmentsDir.listFiles();
+        attachmentLength =+ getSize(mInternalAttachmentsDir);
+        if (useExternalAttachmentDir())
+        {
+            attachmentLength =+ getSize(mExternalAttachmentsDir);
+        }
+
+        File dbFile = new File(mPath);
+        return dbFile.length() + attachmentLength;
+    }
+
+    private long getSize(File attachmentsDir)
+    {
+        long attachmentLength = 0;
+
+        File[] files = attachmentsDir.listFiles();
         for (File file : files)
         {
             if (file.exists())
@@ -244,9 +290,7 @@ public class LocalStore extends Store implements Serializable
             }
         }
 
-
+        return attachmentLength;
-        File dbFile = new File(mPath);
-        return dbFile.length() + attachmentLength;
     }
 
     public void compact() throws MessagingException
@@ -375,24 +419,13 @@ public class LocalStore extends Store implements Serializable
         {
 
         }
-        try
+
-        {
+        delete(mInternalAttachmentsDir);
-            File[] attachments = mAttachmentsDir.listFiles();
+        if (useExternalAttachmentDir())
-            for (File attachment : attachments)
-            {
-                if (attachment.exists())
-                {
-                    attachment.delete();
-                }
-            }
-            if (mAttachmentsDir.exists())
-            {
-                mAttachmentsDir.delete();
-            }
-        }
-        catch (Exception e)
         {
+            delete(mExternalAttachmentsDir);
         }
+
         try
         {
             new File(mPath).delete();
@@ -403,24 +436,53 @@ public class LocalStore extends Store implements Serializable
         }
     }
 
+    private void delete(File attachmentsDir) {
+        try {
+            File[] attachments = attachmentsDir.listFiles();
+            for (File attachment : attachments)
+            {
+                if (attachment.exists())
+                {
+                    attachment.delete();
+                }
+            }
+            if (attachmentsDir.exists())
+            {
+                attachmentsDir.delete();
+            }
+        }
+        catch (Exception e)
+        {
+            Log.w(K9.LOG_TAG, null, e);
+        }
+    }
+
     public void pruneCachedAttachments() throws MessagingException
     {
         pruneCachedAttachments(false);
     }
 
-    /**
-     * Deletes all cached attachments for the entire store.
-     */
     public void pruneCachedAttachments(boolean force) throws MessagingException
     {
-
         if (force)
         {
             ContentValues cv = new ContentValues();
             cv.putNull("content_uri");
             mDb.update("attachments", cv, null, null);
         }
-        File[] files = mAttachmentsDir.listFiles();
+        pruneCachedAttachments(force, mInternalAttachmentsDir);
+        if (useExternalAttachmentDir())
+        {
+            pruneCachedAttachments(force, mExternalAttachmentsDir);
+        }
+    }
+
+    /**
+     * Deletes all cached attachments for the entire store.
+     */
+    private void pruneCachedAttachments(boolean force, File attachmentsDir) throws MessagingException
+    {
+      File[] files = attachmentsDir.listFiles();
         for (File file : files)
         {
             if (file.exists())
@@ -1719,7 +1781,7 @@ public class LocalStore extends Store implements Serializable
                      * so we copy the data into a cached attachment file.
                      */
                     InputStream in = attachment.getBody().getInputStream();
-                    tempAttachmentFile = File.createTempFile("att", null, mAttachmentsDir);
+                    tempAttachmentFile = File.createTempFile("att", null, getAttachmentsDir());
                     FileOutputStream out = new FileOutputStream(tempAttachmentFile);
                     size = IOUtils.copy(in, out);
                     in.close();
@@ -1784,7 +1846,7 @@ public class LocalStore extends Store implements Serializable
 
             if (tempAttachmentFile != null)
             {
-                File attachmentFile = new File(mAttachmentsDir, Long.toString(attachmentId));
+                File attachmentFile = new File(getAttachmentsDir(), Long.toString(attachmentId));
                 tempAttachmentFile.renameTo(attachmentFile);
                 contentUri = AttachmentProvider.getAttachmentUri(
                                  new File(mPath).getName(),
@@ -1942,11 +2004,20 @@ public class LocalStore extends Store implements Serializable
                             long attachmentId = attachmentsCursor.getLong(0);
                             try
                             {
-                                File file = new File(mAttachmentsDir, Long.toString(attachmentId));
+                                File file;
+
+                                file = new File(mInternalAttachmentsDir, Long.toString(attachmentId));
                                 if (file.exists())
                                 {
                                     file.delete();
                                 }
+
+                                file = new File(mExternalAttachmentsDir, Long.toString(attachmentId));
+                                if (file.exists())
+                                {
+                                    file.delete();
+                                }
+
                             }
                             catch (Exception e)
                             {
@@ -2509,14 +2580,6 @@ public class LocalStore extends Store implements Serializable
             {
                 return mApplication.getContentResolver().openInputStream(mUri);
             }
-            catch (FileNotFoundException fnfe)
-            {
-                /*
-                 * Since it's completely normal for us to try to serve up attachments that
-                 * have been blown away, we just return an empty stream.
-                 */
-                return new ByteArrayInputStream(new byte[0]);
-            }
             catch (IOException ioe)
             {
                 throw new MessagingException("Invalid attachment.", ioe);
@@ -2536,4 +2599,34 @@ public class LocalStore extends Store implements Serializable
             return mUri;
         }
     }
+
+    private File getAttachmentsDir()
+    {
+        if (useExternalAttachmentDir())
+        {
+            return mExternalAttachmentsDir;
+        }
+        else {
+            return mInternalAttachmentsDir;
+        }
+    }
+
+    private boolean useExternalAttachmentDir()
+    {
+        if (mAccount.isStoreAttachmentOnSdCard()) {
+            if (!Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED))
+            {
+                throw new IllegalStateException("SDCard not mounted");
+
+            }
+            else
+            {
+                return true;
+            }
+        }
+        else
+        {
+            return false;
+        }
+    }
 }

src/com/fsck/k9/provider/AttachmentProvider.java

@@ -9,6 +9,7 @@ import android.database.sqlite.SQLiteDatabase;
 import android.graphics.Bitmap;
 import android.graphics.BitmapFactory;
 import android.net.Uri;
+import android.os.Environment;
 import android.os.ParcelFileDescriptor;
 import android.util.Log;
 import com.fsck.k9.Account;
@@ -156,6 +157,29 @@ public class AttachmentProvider extends ContentProvider
         }
     }
 
+    private File getFile(String dbName, String id)
+        throws FileNotFoundException
+    {
+        try
+        {
+            File attachmentsDir = getContext().getDatabasePath(dbName + "_att");
+            File file = new File(attachmentsDir, id);
+            if (!file.exists())
+            {
+                file = new File("/sdcard"  + attachmentsDir.getCanonicalPath().substring("/data".length()), id);
+                if (!file.exists()) {
+                    throw new FileNotFoundException();
+                }
+            }
+            return file;
+        }
+        catch (IOException e)
+        {
+            Log.w(K9.LOG_TAG, null, e);
+            throw new FileNotFoundException(e.getMessage());
+        }
+    }
+
     @Override
     public ParcelFileDescriptor openFile(Uri uri, String mode) throws FileNotFoundException
     {
@@ -176,10 +200,9 @@ public class AttachmentProvider extends ContentProvider
                 String type = getType(attachmentUri);
                 try
                 {
-                    FileInputStream in = new FileInputStream(
+                    FileInputStream in = new FileInputStream(getFile(dbName, id));
-                        new File(getContext().getDatabasePath(dbName + "_att"), id));
                     Bitmap thumbnail = createThumbnail(type, in);
-                    thumbnail = thumbnail.createScaledBitmap(thumbnail, width, height, true);
+                    thumbnail = Bitmap.createScaledBitmap(thumbnail, width, height, true);
                     FileOutputStream out = new FileOutputStream(file);
                     thumbnail.compress(Bitmap.CompressFormat.PNG, 100, out);
                     out.close();
@@ -195,7 +218,7 @@ public class AttachmentProvider extends ContentProvider
         else
         {
             return ParcelFileDescriptor.open(
-                       new File(getContext().getDatabasePath(dbName + "_att"), id),
+                       getFile(dbName, id),
                        ParcelFileDescriptor.MODE_READ_ONLY);
         }
     }