一个更简洁的方法是创建一个自定义的 BackupHelper ：

A cleaner approach would be to create a custom BackupHelper:

public class DbBackupHelper extends FileBackupHelper {

    public DbBackupHelper(Context ctx, String dbName) {
        super(ctx, ctx.getDatabasePath(dbName).getAbsolutePath());
    }
}

然后将其添加到 BackupAgentHelper ：

public void onCreate() {
    addHelper(DATABASE, new DbBackupHelper(this, DB.FILE));
}