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 "

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。

您还可以尝试将文件复制到SD卡文件夹，这是一个公共文件夹，然后您可以将文件复制到您的PC上，在那里您可以使用sqlite访问它。

下面是一些你可以用来将文件从data/data复制到公共存储文件夹的代码:

private void copyFile(final Context context) {
    try {
        File sd = Environment.getExternalStorageDirectory();
        File data = Environment.getDataDirectory();

        if (sd.canWrite()) {
            String currentDBPath =
                    context.getDatabasePath(DATABASE_NAME).getAbsolutePath();

            String backupDBPath = "data.db";

            File currentDB = new File(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) {
        e.printStackTrace();
    }
}

清单:

<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.WRITE_INTERNAL_STORAGE" />
<uses-permission android:name="android.permission.READ_INTERNAL_STORAGE" />

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.

打开命令提示符 将目录改为E:\Android\adt-bundle-windows-x86_64-20140702\adt-bundle-windows-x86_64-20140702\sdk\platform-tools 输入以下命令 Adb -d shell 执行命令-as com.your.packagename cat databases/database.db > /sdcard/database.db 将目录更改为cd /sdcard，确保database.db在那里。 Adb pull /sdcard/database.db或者简单地从设备复制database.db。