Push db into application package

First do

1. copy your Database.db file in your projects assets folder.
2. now using coding copy this file into device's internal storage 
  (data/data/<package name>/database folder).

for this use code below given,
try {
// Open your local db as the input stream
InputStream myInput = myContext.getAssets().open("your database file name");
// Path to the just created empty db
String outFileName = "/data/data/your app package name/databases/database file name";
OutputStream myOutput = new FileOutputStream(outFileName);
// transfer bytes from the inputfile to the outputfile
byte[] buffer = new byte[1024];
int length;
while ((length = myInput.read(buffer)) > 0) 
 {
     myOutput.write(buffer, 0, length);
 }
// Close the streams
myOutput.flush();
myOutput.close();
myInput.close();
} catch (Exception e) {
Log.e("error", e.toString());
}