Get app sqlite database programmatically in file

问题

I want to upload my sqlite DB file to DropBox. But before that I need to get the sqlite Db file in code. How can I do this on any device? I checked on this link, and it says that the user needs root permissions to access the database.

So in short:

How can I access my sqlite database with non rooted devices? eg File f = new File("path_to_db_file");

If that approach is impossible, how can I save my app database in a place that I will be able to gain access to it?

Please let me know if I can explain anything. Thank you in advance

回答1:

Yes you can, something like this worked for me without root permission:

File Db = new File("/data/data/your.package/databases/yourdatabasename");        
Date d = new Date();         

File file = new File("your_destination.db");
file.setWritable(true);

copyFile(new FileInputStream(Db), new FileOutputStream(file));

Copy file is a function like this, and works in both directions DB->File and File->DB:

public static void copyFile(FileInputStream fromFile, FileOutputStream toFile) throws IOException {
    FileChannel fromChannel = null;
    FileChannel toChannel = null;
    try {
        fromChannel = fromFile.getChannel();
        toChannel = toFile.getChannel();
        fromChannel.transferTo(0, fromChannel.size(), toChannel);
    } finally {
        try {
            if (fromChannel != null) {
                fromChannel.close();
            }
        } finally {
            if (toChannel != null) {
                toChannel.close();
            }
        }
    }
}

回答2:

I don't know about programmatically but using Rooted Device we can get database from device for that we have to did permission to your app as a Superuser and copy from your app package name and past to your sd card and Access.

来源：https://stackoverflow.com/questions/23056395/get-app-sqlite-database-programmatically-in-file