I am trying to do the same thing but with a database file. And I can
successfully copy a text file to the data directory.
But when I use a sqlite3 db file (either one I pulled off android
emulator data directory or one I made on my desktop machine), I throw
an exception.
Every time I run the read method on a the steam from the db file, I
get an java.io.IOException with no details. Why is this?
I've done some reading and I understand that binary files and unicode
files must be read differently (1 byte versus 2 bites for unicode),
but I thought that readers were for unicode and inputstreams were for
binary. Still, I tried using readers and that didn't work either.
The following code works perfectly to copy a file named textfile.txt
from my raw resource folder. However, when I switch the text file for
an actual myapp.db file (even if I try using the same name as the text
file), I get an exception. If I comment out the while loop, the error
goes away. And it's the read that has the problem. If I comment out
just the write line, I still throw an excpetion.
Is there something different about this file type that won't allow me
to read a stream from it as I am doing?
private void copyDataBase() throws IOException{
//Path to the just created empty db, which I carefully closed so I
have safe write access
OutputStream databaseOutputStream = new FileOutputStream("/data/
data/com.mydomain.myapp/databases/myapp.db");
InputStream databaseInputStream =
databaseOpenHelperContext.getResources().openRawResource
(R.raw.textfile);
byte[] buffer = new byte[1];
int length;
while ( (length = databaseInputStream.read(buffer)) > 0 ) {
databaseOutputStream.write(buffer);
Log.w("Bytes: ", ((Integer)length).toString());
Log.w("value", buffer.toString());
}
//Close the streams
databaseOutputStream.flush();
databaseOutputStream.close();
databaseInputStream.close();
}
On Feb 11, 12:49 pm, Mark Murphy <[email protected]> wrote:
> Anders wrote:
> > I have a simple problem. I want to put a file into my applications
> >apk, and upon installation I would like tocopythis file into the
> >devicefilesystem. Does anyone know how to do this?
>
> Package the file as a raw resource. Get an input stream for the
> resource. Get an output stream for your destination file. From there,
> it's a standard Java I/Ocopyoperation:
>
> http://www.exampledepot.com/egs/java.io/CopyFile.html
>
> --
> Mark Murphy (a Commons Guy)http://commonsware.com
>
> Android Training on the Ranch! -- Mar 16-20,
> 2009http://www.bignerdranch.com/schedule.shtml
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