How to turn off Wifi via ADB?

Question

Im automating a testing procedure for wifi calling and I was wondering is there a way to turn off/on wifi via adb?

I would either like to disable/enable wifi or kill

Answer 1

The following method doesn't require root and should work anywhere (according to docs, even on Android Q+, if you keep targetSdkVersion = 28).

1. Make a blank app.

2. Create a ContentProvider:

   class ApiProvider : ContentProvider() {
   
       private val wifiManager: WifiManager? by lazy(LazyThreadSafetyMode.NONE) {
           requireContext().getSystemService(WIFI_SERVICE) as WifiManager?
       }
   
       private fun requireContext() = checkNotNull(context)
   
       private val matcher = UriMatcher(UriMatcher.NO_MATCH).apply {
           addURI("wifi", "enable", 0)
           addURI("wifi", "disable", 1)
       }
   
       override fun query(uri: Uri, projection: Array?, selection: String?, selectionArgs: Array?, sortOrder: String?): Cursor? {
           when (matcher.match(uri)) {
               0 -> {
                   enforceAdb()
                   withClearCallingIdentity {
                       wifiManager?.isWifiEnabled = true
                   }
               }
               1 -> {
                   enforceAdb()
                   withClearCallingIdentity {
                       wifiManager?.isWifiEnabled = false
                   }
               }
           }
           return null
       }
   
       private fun enforceAdb() {
           val callingUid = Binder.getCallingUid()
           if (callingUid != 2000 && callingUid != 0) {
               throw SecurityException("Only shell or root allowed.")
           }
       }
   
       private inline fun  withClearCallingIdentity(block: () -> T): T {
           val token = Binder.clearCallingIdentity()
           try {
               return block()
           } finally {
               Binder.restoreCallingIdentity(token)
           }
       }
   
       override fun onCreate(): Boolean = true
   
       override fun insert(uri: Uri, values: ContentValues?): Uri? = null
   
       override fun update(uri: Uri, values: ContentValues?, selection: String?, selectionArgs: Array?): Int = 0
   
       override fun delete(uri: Uri, selection: String?, selectionArgs: Array?): Int = 0
   
       override fun getType(uri: Uri): String? = null
   }
   

3. Declare it in AndroidManifest.xml along with necessary permission:

4. Build the app and install it.

5. Call from ADB:

   adb shell content query --uri content://wifi/enable
   adb shell content query --uri content://wifi/disable
   

6. Make a batch script/shell function/shell alias with a short name that calls these commands.

Depending on your device you may need additional permissions.