返回时进入后台

Author: vnt-dev

android/app/src/main/java/top/wherewego/vnt_app/MainActivity.java

@@ -3,6 +3,7 @@
 import android.content.Intent;
 import android.net.VpnService;
 import android.os.Bundle;
+import android.util.Log;
 
 import androidx.annotation.NonNull;
 
@@ -27,13 +28,17 @@ public class MainActivity extends FlutterActivity {
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
     }
-
-
+    @Override
+    protected void onDestroy() {
+        super.onDestroy();
+        MyVpnService.stopVpn();
+    }
     @Override
     public void configureFlutterEngine(@NonNull FlutterEngine flutterEngine) {
         super.configureFlutterEngine(flutterEngine);
         channel = new MethodChannel(flutterEngine.getDartExecutor().getBinaryMessenger(), CHANNEL);
         channel.setMethodCallHandler((call, result) -> {
+            Log.i("moveTaskToBack","moveTaskToBack");
                     if (call.method.equals("startVpn")) {
                         try {
                             Map<String, Object> arguments = call.arguments();
@@ -48,6 +53,11 @@ public void configureFlutterEngine(@NonNull FlutterEngine flutterEngine) {
                         } catch (Exception e) {
                             result.error("VPN_ERROR", "stopVpn", e);
                         }
+                        result.success(null);
+                    }else if (call.method.equals("moveTaskToBack")) {
+                        // 将应用移至后台而不是退出应用
+                        moveTaskToBack(true);
+                        result.success(null);
                     } else {
                         result.notImplemented();
                     }

lib/main.dart

@@ -65,7 +65,15 @@ class VntApp extends StatelessWidget {
       theme: ThemeData(
         primarySwatch: Colors.blue,
       ),
-      home: const HomePage(),
+      home: PopScope(
+          canPop: false,
+          onPopInvoked: (didPop) {
+            if (didPop) {
+              return;
+            }
+            VntAppCall.moveTaskToBack();
+          },
+          child: const HomePage()),
     );
   }
 }

lib/vnt/vnt_manager.dart

@@ -218,6 +218,9 @@ class VntAppCall {
       switch (call.method) {
         case 'stopVnt':
           await vntManager.removeAll();
+          break;
+        case 'startVnt':
+          break;
         default:
           throw PlatformException(
             code: 'Unimplemented',
@@ -232,6 +235,10 @@ class VntAppCall {
         .invokeMethod('startVpn', rustDeviceConfigToMap(info, mtu));
   }
 
+  static Future<void> moveTaskToBack() async {
+    return await VntAppCall.channel.invokeMethod('moveTaskToBack');
+  }
+
   static Future<void> stopVpn() async {
     return await VntAppCall.channel.invokeMethod('stopVpn');
   }