Hv (#295)

* hv
* Change build version

android/app/src/main/java/com/cakewallet/haven/Application.java

@@ -0,0 +1,11 @@
+package com.cakewallet.haven;
+
+import io.flutter.app.FlutterApplication;
+import io.flutter.plugin.common.PluginRegistry;
+import io.flutter.plugin.common.PluginRegistry.PluginRegistrantCallback;
+import io.flutter.plugins.GeneratedPluginRegistrant;
+
+public class Application extends FlutterApplication implements PluginRegistrantCallback {
+  @Override
+  public void registerWith(PluginRegistry registry) {}
+}

android/app/src/main/java/com/cakewallet/haven/MainActivity.java

@@ -0,0 +1,90 @@
+package com.cakewallet.haven;
+
+import androidx.annotation.NonNull;
+
+import io.flutter.embedding.android.FlutterFragmentActivity;
+import io.flutter.embedding.engine.FlutterEngine;
+import io.flutter.plugins.GeneratedPluginRegistrant;
+
+import io.flutter.plugin.common.MethodCall;
+import io.flutter.plugin.common.MethodChannel;
+
+import android.os.AsyncTask;
+import android.os.Build;
+import android.os.Handler;
+import android.os.Looper;
+import android.view.WindowManager;
+
+import com.unstoppabledomains.resolution.DomainResolution;
+import com.unstoppabledomains.resolution.Resolution;
+
+import java.security.SecureRandom;
+
+public class MainActivity extends FlutterFragmentActivity {
+    final String UTILS_CHANNEL = "com.cake_wallet/native_utils";
+    final int UNSTOPPABLE_DOMAIN_MIN_VERSION_SDK = 24;
+
+    @Override
+    public void configureFlutterEngine(@NonNull FlutterEngine flutterEngine) {
+        GeneratedPluginRegistrant.registerWith(flutterEngine);
+
+        MethodChannel utilsChannel =
+                new MethodChannel(flutterEngine.getDartExecutor().getBinaryMessenger(),
+                        UTILS_CHANNEL);
+
+        utilsChannel.setMethodCallHandler(this::handle);
+    }
+
+    private void handle(@NonNull MethodCall call, @NonNull MethodChannel.Result result) {
+        Handler handler = new Handler(Looper.getMainLooper());
+
+        try {
+            switch (call.method) {
+                case "enableWakeScreen":
+                    getWindow().addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON);
+                    handler.post(() -> result.success(true));
+                    break;
+                case "disableWakeScreen":
+                    getWindow().clearFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON);
+                    handler.post(() -> result.success(true));
+                    break;
+                case "sec_random":
+                    int count = call.argument("count");
+                    SecureRandom random = new SecureRandom();
+                    byte bytes[] = new byte[count];
+                    random.nextBytes(bytes);
+                    handler.post(() -> result.success(bytes));
+                    break;
+                case "getUnstoppableDomainAddress":
+                    int  version = Build.VERSION.SDK_INT;
+                    if (version >= UNSTOPPABLE_DOMAIN_MIN_VERSION_SDK) {
+                        getUnstoppableDomainAddress(call, result);
+                    } else {
+                        handler.post(() -> result.success(""));
+                    }
+                    break;
+                default:
+                    handler.post(() -> result.notImplemented());
+            }
+        } catch (Exception e) {
+            handler.post(() -> result.error("UNCAUGHT_ERROR", e.getMessage(), null));
+        }
+    }
+
+    private void getUnstoppableDomainAddress(@NonNull MethodCall call, @NonNull MethodChannel.Result result) {
+        DomainResolution resolution = new Resolution();
+        Handler handler = new Handler(Looper.getMainLooper());
+        String domain = call.argument("domain");
+        String ticker = call.argument("ticker");
+
+        AsyncTask.execute(() -> {
+            try {
+                String address = resolution.getAddress(domain, ticker);
+                handler.post(() -> result.success(address));
+            } catch (Exception e) {
+                System.out.println("Expected Address, but got " + e.getMessage());
+                handler.post(() -> result.success(""));
+            }
+        });
+    }
+}