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

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 "

可能要访问这个文件夹需要管理员权限。

所以你有两个选择:-

根您的设备，然后尝试访问此文件夹 使用模拟器

附注:如果您正在使用上述两个选项中的任何一个，您可以通过以下步骤访问此文件夹

打开DDMS透视图->您的设备->(选择文件资源管理器从 右窗口选项)选择package -> data -> data -> package name - >文件

从那里你可以调出你的文件

你可以像这样下载一个文件:

Adb执行run-as debug .app.package.name cat files/file.mp4 > file.mp4

在你下载之前，你可能不想看看你的App-Directory中的文件结构。要做到这一点，请按照上面THelper提到的步骤:

adb shell
run-as com.your.packagename 
cd files
ls -als .

Shahidul提到的Android-Studio方式(https://stackoverflow.com/a/44089388/1256697)也可以。对于那些在菜单中没有看到DeviceFile资源管理器选项的人:请确保在Android Studio中打开/ Android - directory。 例如，react-native用户在他们的Project-Folder中有这个和/ios-Directory在同一级别。

SQLlite数据库存储在用户的手机，它隐藏在路径下:

/Data/Data/com.companyname.AppName/File/

你有两个选择:

你可以根你的手机，这样你就可以查看你的隐藏 db4文件 这不是解决方案，而是一种变通办法。为什么不直接创建测试呢 使用“select”语句在其中显示数据库表的页面。