我也曾经遇到过同样的问题。除了adb shell或根设备，没有办法在android设备中直接访问文件。

下面是02种替代方案:

1)

 public void exportDatabse(String databaseName)
   {
     try {
        File sd = Environment.getExternalStorageDirectory();
        File data = Environment.getDataDirectory();

        if (sd.canWrite()) {
            String currentDBPath = "//data//"+getPackageName()+"//databases//"+databaseName+"";
            String backupDBPath = "backupname.db";
            File currentDB = new File(data, currentDBPath);
            File backupDB = new File(sd, backupDBPath);

            if (currentDB.exists()) {
                FileChannel src = new FileInputStream(currentDB).getChannel();
                FileChannel dst = new FileOutputStream(backupDB).getChannel();
                dst.transferFrom(src, 0, src.size());
                src.close();
                dst.close();
            }
        }
    } catch (Exception e) {

    }
}

2)试试这个:https://github.com/sanathp/DatabaseManager_For_Android

直接在手机上访问这些文件很困难，但你可以将它们复制到你的电脑上，在那里你可以做任何你想做的事情。 没有根你有两个选择:

If the application is debuggable you can use the run-as command in adb shell adb shell run-as com.your.packagename cp /data/data/com.your.packagename/ Alternatively you can use Android's backup function. adb backup -noapk com.your.packagename You will now be prompted to 'unlock your device and confirm the backup operation'. It's best NOT to provide a password, otherwise it becomes more difficult to read the data. Just click on 'backup my data'. The resulting 'backup.ab' file on your computer contains all application data in android backup format. Basically it's a compressed tar file. This page explains how you can use OpenSSL's zlib command to uncompress it. You can use the adb restore backup.db command to restore the backup.

要做到以上任何一项(即从手机本身访问受保护的文件夹)，你仍然需要root。(这包括更改/data文件夹的挂载权限并访问它)

如果没有root，除了通过代码从应用程序内部读取外，直接访问/数据是不可能的。所以你可以试着把那个文件复制到sdcard或者其他可以访问的地方，然后，你就可以正常访问它了。

如果您使用的是开发人员设备，那么root不会使您的保修失效。对不起，我没有别的办法了。

adb backup didn't work for me, so here's what I did (Xiaomi Redmi Note 4X, Android 6.0): 1. Go to Settings > Additional Settings > Backup & reset > Local backups. 2. Tap 'Back up' on the bottom of the screen. 3. Uncheck 'System' and 'Apps' checkmarks. 4. Tap detail disclosure button on the right of the 'Apps' cell to navigate to app selection screen. 5. Select the desired app and tap OK. 6. After the backup was completed, the actual file need to be located somehow. Mine could be found at /MIUI/backup/AllBackup/_FOLDER_NAMED_AFTER_BACKUP_CREATION_DATE_. 7. Then I followed the steps from this answer by RonTLV to actually convert the backup file (.bak in my case) to tar (duplicating from the original answer): " a) Go here and download: https://sourceforge.net/projects/adbextractor/ b) Extract the downloaded file and navigate to folder where you extracted. c) run this with your own file names: java -jar abe.jar unpack c:\Intel\xxx.ab c:\Intel\xxx.tar "

使用eclipse中的文件资源管理器。Select Windows => Show View => Other…>文件资源管理器。

另一种方法是通过adb提取文件:

adb pull /system/data/data/<yourpackagename>/databases/<databasename> /sdcard

你也可以尝试使用根资源管理器应用程序获取db。如果这不起作用，那么你可以试试这个:

打开cmd 改变目录，进入“平台工具” 类型为“adb shell” 苏 在设备上按“允许” chmod 777 /数据/数据/数据/数据/数据/ com.application。包/数据/数据/ com.application.package / * 在Eclipse中打开DDMS视图，然后从那里打开“FileExplorer”以获得所需的文件

在此之后，您应该能够浏览根设备上的文件。