retain java value

doric-android/doric/src/main/java/pub/doric/DoricContext.java

@@ -29,6 +29,7 @@ import com.github.pengfeizhou.jscore.JSONBuilder;
 
 import org.json.JSONObject;
 
+import java.lang.ref.SoftReference;
 import java.util.ArrayList;
 import java.util.Collection;
 import java.util.HashMap;
@@ -69,6 +70,7 @@ public class DoricContext {
     private final DoricPerformanceProfile performanceProfile;
     private final Map<String, Animator> animators = new HashMap<>();
     private final Map<String, DoricResource> cachedResources = new WeakHashMap<>();
+    private final ArrayList<SoftReference<RetainedJavaValue>> retainedJavaValues = new ArrayList<>();
 
     public Collection<ViewNode<?>> allHeadNodes(String type) {
         Map<String, ViewNode<?>> headNode = mHeadNodes.get(type);
@@ -223,6 +225,8 @@ public class DoricContext {
                         return null;
                     }
                 }, ThreadMode.UI);
+
+                retainedJavaValues.clear();
             }
         });
         DoricContextManager.getInstance().destroyContext(this);
@@ -367,4 +371,12 @@ public class DoricContext {
     public DoricResource getCachedResource(String resId) {
         return this.cachedResources.get(resId);
     }
+
+    public void retainJavaValue(SoftReference<RetainedJavaValue> retainedJavaValue) {
+        retainedJavaValues.add(retainedJavaValue);
+    }
+
+    public void releaseJavaValue(SoftReference<RetainedJavaValue> retainedJavaValue) {
+        retainedJavaValues.remove(retainedJavaValue);
+    }
 }

doric-android/doric/src/main/java/pub/doric/RetainedJavaValue.java

@@ -0,0 +1,25 @@
+package pub.doric;
+
+import com.github.pengfeizhou.jscore.JavaValue;
+
+import java.lang.ref.SoftReference;
+import java.lang.ref.WeakReference;
+
+public class RetainedJavaValue extends JavaValue {
+    private final WeakReference<DoricContext> mDoricContext;
+
+    public RetainedJavaValue(WeakReference<DoricContext> doricContext, byte[] data) {
+        super(data);
+
+        this.mDoricContext = doricContext;
+        this.mDoricContext.get().retainJavaValue(new SoftReference<>(this));
+        this.memoryReleaser = new MemoryReleaser() {
+            @Override
+            public void deallocate(byte[] data) {
+                if (doricContext.get() != null) {
+                    doricContext.get().releaseJavaValue(new SoftReference<>(RetainedJavaValue.this));
+                }
+            }
+        };
+    }
+}

doric-android/doric/src/main/java/pub/doric/plugin/ImageDecoderPlugin.java

@@ -22,9 +22,11 @@ import com.github.pengfeizhou.jscore.JSONBuilder;
 import com.github.pengfeizhou.jscore.JSObject;
 import com.github.pengfeizhou.jscore.JavaValue;
 
+import java.lang.ref.WeakReference;
 import java.nio.ByteBuffer;
 
 import pub.doric.DoricContext;
+import pub.doric.RetainedJavaValue;
 import pub.doric.async.AsyncResult;
 import pub.doric.extension.bridge.DoricMethod;
 import pub.doric.extension.bridge.DoricPlugin;
@@ -95,7 +97,9 @@ public class ImageDecoderPlugin extends DoricJavaPlugin {
                     Bitmap bitmap = BitmapFactory.decodeByteArray(rawData, 0, rawData.length);
                     ByteBuffer buffer = ByteBuffer.allocate(bitmap.getByteCount());
                     bitmap.copyPixelsToBuffer(buffer);
-                    promise.resolve(new JavaValue(buffer.array()));
+
+                    RetainedJavaValue retainedJavaValue = new RetainedJavaValue(new WeakReference<DoricContext>(getDoricContext()), buffer.array());
+                    promise.resolve(retainedJavaValue);
                 }
 
                 @Override