db数据库的处理

final String DB_DESTINATION = "/data/data/YOUR_PACKAGE_NAME/databases/MyDatabaseFile.db"; 
 
// Check if the database exists before copying 
boolean initialiseDatabase = (new File("DB_DESTINATION")).exists(); 
if (initialiseDatabase == true) { 
 
    // Open the .db file in your assets directory 
    InputStream is = getContext().getAssets().open("MyDatabaseFile.db"); 
 
    // Copy the database into the destination 
    OutputStream os = new FileOutputStream(DB_DESTINATION); 
    byte[] buffer = new byte[1024]; 
    int length; 
    while ((length = is.read(buffer)) > 0){ 
        os.write(buffer, 0, length); 
    } 
    os.flush(); 
 
    os.close(); 
    is.close(); 
}