android MusicPlugin.java

android/app/src/main/java/com/example/aman_kassa_flutter/bank/MusicPlugin.java

@@ -0,0 +1,34 @@
+package com.example.aman_kassa_flutter.bank;
+
+import android.content.Intent;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import io.flutter.plugin.common.MethodCall;
+import io.flutter.plugin.common.MethodChannel;
+import io.flutter.plugin.common.MethodChannel.MethodCallHandler;
+import io.flutter.plugin.common.MethodChannel.Result;
+
+public class MusicPlugin implements MethodCallHandler {
+    @Override
+    public void onMethodCall(MethodCall call, Result result) {
+        switch (call.method) {
+            case "ping":
+
+                result.success("pong - 3");
+                break;
+            case "get":
+                final List<Object> json = new ArrayList<>();
+                for (int i =0; i < 2 ; i++) {
+                    json.add("{\"name:\":\"test\" }"); // Map<String, Object> entries
+                }
+                result.success(json);
+                break;
+            default:
+                result.notImplemented();
+        }
+    }
+
+    // Other methods elided.
+}

lib/views/bank_view/bank_view.dart

@@ -0,0 +1,66 @@
+import 'package:flutter/material.dart';
+import 'package:flutter/services.dart';
+
+class BankView extends StatefulWidget {
+  BankView();
+
+  @override
+  _BankViewState createState() => _BankViewState();
+}
+
+class _BankViewState extends State<BankView> {
+  static const MethodChannel _channel =
+      MethodChannel('channel:com.amanKassa/bank');
+  static const MethodChannel _activity =
+      MethodChannel('channel:com.amanKassa/activity');
+  String value;
+  bool loading = false;
+  @override
+  void initState() {
+    super.initState();
+    load();
+  }
+
+  load() async {
+    setState(() {
+      loading = true;
+    });
+    String result = await _channel.invokeMethod('ping');
+
+    setState(() {
+      value = result ?? 'none';
+      loading = false;
+    });
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    return Scaffold(
+      appBar: AppBar(
+        centerTitle: true,
+        title: Text('Банковская страница'),
+      ),
+      body: loading
+          ? Container(child: Center(child: CircularProgressIndicator()))
+          : SingleChildScrollView(
+              child: Column(
+                children: <Widget>[
+                  Container(
+                    margin: const EdgeInsets.all(8.0),
+                    child: Text(value),
+                  ),
+                  RaisedButton(
+                      child: Text('Press'),
+                      onPressed: () async {
+                        String result = await _activity.invokeMethod("start");
+                        print('invokeMethod: $result');
+                        setState(() {
+                          loading = false;
+                        });
+                      })
+                ],
+              ),
+            ),
+    );
+  }
+}