/**
* Based on <a href="http://www.screaming-penguin.com/node/7749">Backing up your Android SQLite
* database to the SD card</a>
*
* @param src
* @param dst
* @return true if success
* @throws IOException
*/
boolean copyFile(File src, File dst) throws IOException {
long sizeIn = -1;
long sizeCopied = 0;
boolean ok = false;
if (src != null && src.exists()) {
sizeIn = src.length();
if (!dst.createNewFile()) {
MyLog.e(this, "New file was not created: '" + dst.getCanonicalPath() + "'");
} else if (src.getCanonicalPath().compareTo(dst.getCanonicalPath()) == 0) {
MyLog.d(this, "Cannot copy to itself: '" + src.getCanonicalPath() + "'");
} else {
FileInputStream fileInputStream = null;
java.nio.channels.FileChannel inChannel = null;
FileOutputStream fileOutputStream = null;
java.nio.channels.FileChannel outChannel = null;
try {
fileInputStream = new FileInputStream(src);
inChannel = fileInputStream.getChannel();
fileOutputStream = new FileOutputStream(dst);
outChannel = fileOutputStream.getChannel();
sizeCopied = inChannel.transferTo(0, inChannel.size(), outChannel);
ok = (sizeIn == sizeCopied);
} finally {
DbUtils.closeSilently(outChannel);
DbUtils.closeSilently(fileOutputStream);
DbUtils.closeSilently(inChannel);
DbUtils.closeSilently(fileInputStream);
}
}
}
MyLog.d(this, "Copied " + sizeCopied + " bytes of " + sizeIn);
return ok;
}
private Cursor queryDatabase() {
final String method = "queryDatabase";
Cursor cursor = null;
for (int attempt = 0; attempt < 3 && !isCancelled(); attempt++) {
try {
cursor =
MyContextHolder.get()
.context()
.getContentResolver()
.query(
getParams().mContentUri,
getParams().mProjection,
getParams().mSa.selection,
getParams().mSa.selectionArgs,
getParams().mSortOrder);
break;
} catch (IllegalStateException e) {
logD(method, "Attempt " + attempt + " to prepare cursor", e);
DbUtils.closeSilently(cursor);
try {
Thread.sleep(500);
} catch (InterruptedException e2) {
logD(method, "Attempt " + attempt + " to prepare cursor was interrupted", e2);
break;
}
}
}
return cursor;
}
private void loadMessageFromDatabase(ConversationOneMessage oMsg) {
Uri uri = MyProvider.getTimelineMsgUri(ma.getUserId(), TimelineTypeEnum.ALL, true, oMsg.msgId);
Cursor cursor = null;
try {
cursor = context.getContentResolver().query(uri, PROJECTION, null, null, null);
if (cursor != null && cursor.moveToFirst()) {
loadMessageFromCursor(oMsg, cursor);
}
} finally {
DbUtils.closeSilently(cursor);
}
}
private void deliverResultsAndClean(Cursor cursor) {
Cursor cursorPrev = null;
try {
if (this.mCursor != cursor) {
cursorPrev = this.mCursor;
this.mCursor = cursor;
}
if (getParams().cancelled || cursor == null) {
deliverCancellation();
} else {
deliverResult(cursor);
}
} finally {
DbUtils.closeSilently(cursorPrev, "asyncLoaderEnded");
synchronized (asyncLoaderLock) {
asyncLoader = null;
}
}
}
private void disposeResult() {
DbUtils.closeSilently(mCursor, "disposeResult");
mCursor = null;
}