Merge branch 'release/0.7.2'

README.md

@@ -26,14 +26,6 @@ Dart finalizer is only supported above Flutter 3(Dart 2.17), but with DartNative
 
 DartNative supports automatic type conversion so its bridging code is shorter & simpler than the Flutter channel.
 
-A comparison of the task of "checking if an app needs to be installed" is shown below:
-
-| | # of lines of bridging code | Coding complexity |
-| --- | --- | --- |
-| DartNative | Dart 1 + Native 1 | Autogenerated code returns BOOL directly |
-| Channel | Dart 15 + Native 30 | Needs to manually define return format, convert NSNumber to BOOL, determine channel & methodName |
-
-
 The design and vision of this package:
 
 ![](images/dartnative.png)
@@ -183,7 +175,7 @@ unitTest.addFinalizer(() { // register a finalizer callback.
 | List | NSArray | Array | List, ArrayList |
 | Map | NSDictionary | Dictionary | Map, HashMap |
 | Set | NSSet | Set | Set, HashSet |
-| Function | Block | Closure | Promise(TODO) |
+| Function | Block | Closure | Promise |
 | Pointer | void * | UnsafeMutableRawPointer | - |
 | NativeByte | NSData | Data | DirectByteBuffer |
 | NativeObject | NSObject | NSObject | Object |
@@ -310,11 +302,6 @@ NOTE: *If you use dart_native on macOS, you must use `use_frameworks!` in your P
 
 ## Documentation
 
-### Readme
-
-1. [dart_native README.md](/dart_native/README.md)
-2. [dart_native_gen README.md](/dart_native_gen/README.md)
-
 ### Further reading
 
 - [告别 Flutter Channel，调用 Native API 仅需一行代码！](http://yulingtianxia.com/blog/2020/06/25/Codegen-for-DartNative/)

dart_native/CHANGELOG.md

@@ -1,3 +1,7 @@
+## 0.7.2
+
+* [Fix] Support Promise on Android.
+
 ## 0.7.1
 
 * [Fix] Leaks on iOS.

dart_native/README.md

@@ -0,0 +1 @@
+/Users/yangxiaoyu/Code/dart_native/README.md

dart_native/android/src/main/java/com/dartnative/dart_native/CallbackInvocationHandler.java

@@ -3,6 +3,7 @@
 import java.lang.reflect.InvocationHandler;
 import java.lang.reflect.Method;
 import java.util.HashMap;
+import java.util.concurrent.atomic.AtomicBoolean;
 
 /**
  * Created by huizzzhou on 2020/11/11.
@@ -19,8 +20,16 @@ public class CallbackInvocationHandler implements InvocationHandler {
         put("char", "java.lang.Character");
     }};
 
+    AtomicBoolean done = new AtomicBoolean(false);
+
     @Override
     public Object invoke(Object proxy, Method method, Object[] args) throws Throwable {
+        boolean isDartFunctionHandler = proxy instanceof FunctionHandler;
+        // For auto release memory, invoke only once.
+        if (isDartFunctionHandler && done.getAndSet(true)) {
+            throw new IllegalStateException("Invoke already submitted.");
+        }
+        args = (isDartFunctionHandler && args != null) ? (Object[]) args[0] : args;
         int argumentLength = args == null ? 0 : args.length;
         String[] paramsType = new String[argumentLength];
         for (int i = 0; i < argumentLength; i++) {
@@ -31,9 +40,12 @@ public Object invoke(Object proxy, Method method, Object[] args) throws Throwabl
         String returnType = method.getReturnType().getName();
         returnType = sBasicTypeConvert.get(returnType) == null ? returnType : sBasicTypeConvert.get(returnType);
         long dartObjectAddress = CallbackManager.getInstance().getRegisterDartAddr(proxy);
+        if (isDartFunctionHandler) {
+            CallbackManager.unRegisterCallback(proxy);
+        }
 
-        return hookCallback(dartObjectAddress, funName, argumentLength, paramsType, args, returnType);
+        return hookCallback(dartObjectAddress, funName, argumentLength, paramsType, args, returnType, isDartFunctionHandler);
     }
 
-    private native Object hookCallback(long dartObjectAddress, String funName, int argCount, String[] argTypes, Object[] args, String returnType);
+    private native Object hookCallback(long dartObjectAddress, String funName, int argCount, String[] argTypes, Object[] args, String returnType, boolean isDartFunctionHandler);
 }

dart_native/android/src/main/java/com/dartnative/dart_native/FunctionHandler.java

@@ -0,0 +1,5 @@
+package com.dartnative.dart_native;
+
+public interface FunctionHandler {
+    Object invoke(Object... arguments);
+}

dart_native/android/src/main/jni/src/dart_native.cc

@@ -185,7 +185,7 @@ void RegisterNativeCallback(void *dartObject,
   DoRegisterNativeCallback(dartObject, clsName, funName, callback, dartPort, env);
 }
 
-DN_EXTERN void UnregisterNativeCallback(void *dart_object) {
+void UnregisterNativeCallback(void *dart_object) {
   auto env = AttachCurrentThread();
   if (env == nullptr) {
     DNError("UnRegisterNativeCallback error, no JNIEnv provided!");

dart_native/android/src/main/jni/src/dn_callback.cc

@@ -52,7 +52,8 @@ static jobject HookNativeCallback(JNIEnv *env,
                                   jint argument_count,
                                   jobjectArray argument_types,
                                   jobjectArray arguments_array,
-                                  jstring return_type_str) {
+                                  jstring return_type_str,
+                                  jboolean is_function_handler) {
   auto callbacks = GetDartRegisterCallback(dart_object_address);
   if (callbacks.empty()) {
     DNError("Invoke dart function error, not register this dart object!");
@@ -102,6 +103,10 @@ static jobject HookNativeCallback(JNIEnv *env,
                          env,
                          async_callback);
 
+  if (is_function_handler) {
+    RemoveDartRegisterCallback(dart_object_address);
+  }
+
   return callback_result;
 }
 
@@ -142,7 +147,7 @@ void InitCallback(JNIEnv *env) {
   static const JNINativeMethod interface_jni_methods[] = {
       {
           .name = "hookCallback",
-          .signature = "(JLjava/lang/String;I[Ljava/lang/String;[Ljava/lang/Object;Ljava/lang/String;)Ljava/lang/Object;",
+          .signature = "(JLjava/lang/String;I[Ljava/lang/String;[Ljava/lang/Object;Ljava/lang/String;Z)Ljava/lang/Object;",
           .fnPtr = (void *) HookNativeCallback
       }
   };

dart_native/example/android/app/src/main/java/com/dartnative/dart_native_example/InterfaceDemo.java

@@ -5,11 +5,11 @@
 import androidx.annotation.Nullable;
 
 import java.nio.ByteBuffer;
-import java.nio.charset.StandardCharsets;
 import java.util.Arrays;
 import java.util.Map;
 
 import com.dartnative.dart_native.DartNativeInterface;
+import com.dartnative.dart_native.FunctionHandler;
 import com.dartnative.dart_native.annotation.InterfaceEntry;
 import com.dartnative.dart_native.annotation.InterfaceMethod;
 
@@ -51,4 +51,9 @@ public ByteBuffer getUTF8Data(String str) {
         byteBuffer.rewind();
         return byteBuffer;
     }
+
+    @InterfaceMethod(name = "testCallback")
+    public void testCallback(FunctionHandler functionHandler) {
+        functionHandler.invoke(true, "callback from native");
+    }
 }

dart_native/example/lib/main.dart

@@ -60,6 +60,9 @@ class _DartNativeAppState extends State<DartNativeApp> {
     unitTest.addFinalizer(() {
       print('The instance of \'unitTest\' has been destroyed!');
     });
+
+    // example callback
+    testCallback();
   }
 
   String helloWorld() {
@@ -74,6 +77,16 @@ class _DartNativeAppState extends State<DartNativeApp> {
     return interface.invokeMethodSync('getUTF8Data', args: [str]);
   }
 
+  void testCallback() {
+    interface.invokeMethodSync('testCallback', args: [
+      (bool success, String result) {
+        if (success) {
+          print(result);
+        }
+      }
+    ]);
+  }
+
   Future<void> calculate() async {
     final aStr = _controllerA.text;
     final bStr = _controllerB.text;

dart_native/example/pubspec.lock

@@ -168,7 +168,7 @@ packages:
       path: ".."
       relative: true
     source: path
-    version: "0.7.1"
+    version: "0.7.2"
   dart_native_gen:
     dependency: transitive
     description:

dart_native/lib/src/android/common/pointer_encoding.dart

@@ -1,6 +1,7 @@
 import 'dart:ffi';
 import 'dart:typed_data';
 
+import 'package:dart_native/src/android/common/callback_manager.dart';
 import 'package:dart_native/src/android/foundation/collection/jarray.dart';
 import 'package:dart_native/src/android/foundation/direct_byte_buffer.dart';
 import 'package:dart_native/src/android/foundation/native_type.dart';
@@ -21,6 +22,7 @@ enum ValueType {
   string,
   byteBuffer,
   cls,
+  function,
   unknown
 }
 
@@ -35,6 +37,8 @@ Map<ValueType, Pointer<Utf8>> _pointerForEncode = {
   ValueType.bool: 'Z'.toNativeUtf8(),
   ValueType.string: 'Ljava/lang/String;'.toNativeUtf8(),
   ValueType.byteBuffer: 'Ljava/nio/ByteBuffer;'.toNativeUtf8(),
+  ValueType.function:
+      'Lcom/dartnative/dart_native/FunctionHandler;'.toNativeUtf8(),
   ValueType.unknown: 'Lunknown;'.toNativeUtf8(),
 };
 
@@ -119,6 +123,16 @@ dynamic storeValueToPointer(dynamic object, Pointer<Pointer<Void>> ptr,
     typePtr.value = argSignature ?? _pointerForEncode[ValueType.unknown]!;
     return;
   }
+
+  if (object is Function) {
+    final functionHandler = JObject(
+        className: 'com/dartnative/dart_native/FunctionHandler',
+        isInterface: true);
+    registerCallback(functionHandler, object, 'invoke');
+    ptr.value = functionHandler.pointer;
+    typePtr.value = argSignature ?? _pointerForEncode[ValueType.function]!;
+    return;
+  }
 }
 
 dynamic loadValueFromPointer(Pointer<Void> ptr, String returnType) {

dart_native/lib/src/android/runtime/jobject.dart

@@ -74,7 +74,9 @@ class JObject extends NativeObject {
           ' or use @nativeJavaClass annotation to specify the java class';
     }
     _ptr = newObject(_cls!, this, args: args, isInterface: isInterface);
-    bindLifeCycleWithJava(_ptr);
+    if (!isInterface) {
+      bindLifeCycleWithJava(_ptr);
+    }
   }
 
   /// Wrapper java object pointer as dart object.

dart_native/pubspec.yaml

@@ -1,6 +1,6 @@
 name: dart_native
 description: Write native code using Dart. This package liberates you from native code and low performance channel.
-version: 0.7.1
+version: 0.7.2
 homepage: https://github.com/dart-native/dart_native
 
 environment: