Creating android app Database with big amount of data
- by Thomas
Hi all,
The database of my application need to be filled with a lot of data,
so during onCreate(), it's not only some create table sql
instructions, there is a lot of inserts. The solution I chose is to
store all this instructions in a sql file located in res/raw and which
is loaded with Resources.openRawResource(id).
It works well but I face to encoding issue, I have some accentuated
caharacters in the sql file which appears bad in my application. This
my code to do this :
public String getFileContent(Resources resources, int rawId) throws
IOException
{
InputStream is = resources.openRawResource(rawId);
int size = is.available();
// Read the entire asset into a local byte buffer.
byte[] buffer = new byte[size];
is.read(buffer);
is.close();
// Convert the buffer into a string.
return new String(buffer);
}
public void onCreate(SQLiteDatabase db) {
try {
// get file content
String sqlCode = getFileContent(mCtx.getResources(), R.raw.db_create);
// execute code
for (String sqlStatements : sqlCode.split(";"))
{
db.execSQL(sqlStatements);
}
Log.v("Creating database done.");
} catch (IOException e) {
// Should never happen!
Log.e("Error reading sql file " + e.getMessage(), e);
throw new RuntimeException(e);
} catch (SQLException e) {
Log.e("Error executing sql code " + e.getMessage(), e);
throw new RuntimeException(e);
}
The solution I found to avoid this is to load the sql instructions
from a huge static final string instead of a file, and all
accentutated characters appears well.
But Isn't there a more elegant way to load sql instructions than a big
static final String attribute with all sql instructions ?
Thanks in advance
Thomas
