📱 Data Migration from Old Domain

When a website domain becomes unavailable, you can extract locally stored IndexedDB data from the Android APP and import it to a new site.

0️⃣ Prerequisites

Computer

Tool	Description
OS	Windows / macOS / Linux
adb	Android Debug Bridge
Terminal	Command Prompt / PowerShell / Terminal

Install adb

Windows
macOS
Linux

Download SDK Platform Tools
Extract to C:\platform-tools
Add to system PATH (see detailed steps below)

brew install android-platform-tools

sudo apt install adb

Windows: Configure Environment Variables

Open Run Dialog

Press Win + R, type sysdm.cpl, click OK

Open System Properties

Select the “Advanced” tab

Click 'Environment Variables'

Edit Path Variable

Find Path in “System variables”, click “Edit”

Add adb Path

Click “New”, enter C:\platform-tools, click OK

Phone

Requirement	Description
Android Phone	With target APP installed (e.g., `com.liaobots.app`)
USB Debugging	Enabled (see steps below)
USB Cable	Connect phone to computer

Enable Developer Options and USB Debugging

Go to “Settings” → “About Phone”
Tap “Build Number” 7 times → Become a developer
Go back to “Settings” → “Developer Options” → Enable “USB Debugging”
Connect phone to computer with USB cable

1️⃣ Check adb Connection

Verify adb Installation

adb version

Shows version number if successful:

Android Debug Bridge version 1.0.41

Connect Phone

adb devices

Phone will show authorization prompt → Tap “Allow”

Output example:

List of devices attached
ABCDEF12345    device

Shows device means connection successful

2️⃣ Find IndexedDB Data

Enter adb shell

adb shell

Switch to App User

run-as com.liaobots.app

This command only works for debug version APK. Release APK requires root access.

Navigate to IndexedDB Directory

cd app_webview/Default/IndexedDB
ls

You’ll see output like:

https_liaobots.work_0.indexeddb.leveldb
https_liaobots1.work_0.indexeddb.leveldb
https_liaobots2.work_0.indexeddb.leveldb

These .indexeddb.leveldb folders contain your data

Exit adb shell

exit
exit

3️⃣ Export Data to Computer

Run in computer terminal (not adb shell):

adb exec-out run-as com.liaobots.app tar cf - app_webview/Default/IndexedDB > IndexedDB_backup.tar

This creates IndexedDB_backup.tar in current directory.

Extract File

Windows
macOS / Linux

tar -xf IndexedDB_backup.tar

tar -xf IndexedDB_backup.tar

Extracted directory structure:

app_webview/
└── Default/
    └── IndexedDB/
        ├── https_liaobots.work_0.indexeddb.leveldb/
        ├── https_liaobots1.work_0.indexeddb.leveldb/
        └── ...

4️⃣ Restore Data to New Site

Visit the data recovery page on new site (e.g., /downloadjson)
Click “Select IndexedDB Folder”
Select the extracted .indexeddb.leveldb folder

Make sure to select the .indexeddb.leveldb folder, NOT the .indexeddb.blob folder

Wait for parsing to complete, download JSON file
Import JSON file to new site to restore data

❓ FAQ

run-as command shows 'Package not debuggable'

The APK is a release version, not debug. You need a debug APK or root access.

adb devices shows unauthorized

You didn’t tap “Allow” on phone. Check for authorization popup on phone screen.

Exported tar file is empty

Check if path is correct. Use adb shell to verify files exist on phone first.

tar command not found on Windows

Windows 10+ includes tar. If not available, use 7-Zip to extract.

📝 Command Cheatsheet

Step	Command
Check adb version	`adb version`
List devices	`adb devices`
Enter shell	`adb shell`
Switch to app user	`run-as com.liaobots.app`
View IndexedDB	`ls app_webview/Default/IndexedDB`
Export data	`adb exec-out run-as com.liaobots.app tar cf - app_webview/Default/IndexedDB > IndexedDB_backup.tar`
Extract	`tar -xf IndexedDB_backup.tar`

​📱 Data Migration from Old Domain

​0️⃣ Prerequisites

​Computer

​Install adb

​Windows: Configure Environment Variables

​Phone

​Enable Developer Options and USB Debugging

​1️⃣ Check adb Connection

​Verify adb Installation

​Connect Phone

​2️⃣ Find IndexedDB Data

​Enter adb shell

​Switch to App User

​Navigate to IndexedDB Directory

​Exit adb shell

​3️⃣ Export Data to Computer

​Extract File

​4️⃣ Restore Data to New Site

​❓ FAQ

​📝 Command Cheatsheet

📱 Data Migration from Old Domain

0️⃣ Prerequisites

Computer

Install adb

Windows: Configure Environment Variables

Phone

Enable Developer Options and USB Debugging

1️⃣ Check adb Connection

Verify adb Installation

Connect Phone

2️⃣ Find IndexedDB Data

Enter adb shell

Switch to App User

Navigate to IndexedDB Directory

Exit adb shell

3️⃣ Export Data to Computer

Extract File

4️⃣ Restore Data to New Site

❓ FAQ

📝 Command Cheatsheet