How To Start An Activity From Flutter Plugin Using An Api

So I am making a Flutter plugin and I am attempting to run Kotlin code on Android. The problem is, this code runs a method which attempts to start an activity without the FLAG_ACTI

Solution 1:

You can extend your plugin to implement ActivityAware in your plugin class, when you implement it, you get a couple of callbacks that gives you the current activity. Like this :

lateinit activity: Activity? = nulloverridefunonDetachedFromActivity() {
    activity = null
  }

  overridefunonReattachedToActivityForConfigChanges(binding: ActivityPluginBinding) {
    activity = binding.activity
  }

  overridefunonAttachedToActivity(binding: ActivityPluginBinding) {
    activity = binding.activity
  }

  overridefunonDetachedFromActivityForConfigChanges() {
    activity = null
  }

After that you can just startActivity from the assigned activity variable.

Let me know if you need further help.

Solution 2:

As you mentioned, For Flutter plugin any platform-dependent logics should be kept in the subclass of FlutterActivity which was used to show flutter module/screens inside a native module. Now you can launch intent from that subclass without any additional flags.

@note - Subclass of FlutterActvity should be kept in the native module.

classFlutterResponseActivity : FlutterActivity() {
        privatevar methodResult: Result? = nulloverridefunprovideFlutterEngine(context: Context): FlutterEngine? {
            return MyApplication.mContext.flutterEngine //Pre-warmed flutter engine
        }

        overridefunconfigureFlutterEngine(flutterEngine: FlutterEngine) {
        GeneratedPluginRegistrant.registerWith(flutterEngine)
        MethodChannel(flutterEngine.dartExecutor.binaryMessenger, CHANNEL).setMethodCallHandler { call, result ->
            when (call.method) {
                "startMainActivity" -> {
                    startMainActivity()
                    result.success(true)
                }
                else -> result.notImplemented()
            }
        }
    }

        privatefunstartMainActivity() {
             val intent = Intent(this, MainActivity::class.java)
            startActivity(intent)
        }
    }