diff --git a/Android/APIExample/agora-simple-filter/build.gradle b/Android/APIExample/agora-simple-filter/build.gradle
index c54d70f49..560e7feda 100644
--- a/Android/APIExample/agora-simple-filter/build.gradle
+++ b/Android/APIExample/agora-simple-filter/build.gradle
@@ -43,6 +43,6 @@ dependencies {
     api fileTree(dir: "libs", include: ["*.jar", "*.aar"])
     implementation 'androidx.appcompat:appcompat:1.1.0'
     testImplementation 'junit:junit:4.12'
-    androidTestImplementation 'androidx.test.ext:junit:1.1.1'
-    androidTestImplementation 'androidx.test.espresso:espresso-core:3.2.0'
+    androidTestImplementation 'androidx.test.ext:junit:1.1.3'
+    androidTestImplementation 'androidx.test.espresso:espresso-core:3.4.0'
 }
diff --git a/Android/APIExample/agora-simple-filter/src/main/cpp/CMakeLists.txt b/Android/APIExample/agora-simple-filter/src/main/cpp/CMakeLists.txt
index 977ea6581..b052242a5 100644
--- a/Android/APIExample/agora-simple-filter/src/main/cpp/CMakeLists.txt
+++ b/Android/APIExample/agora-simple-filter/src/main/cpp/CMakeLists.txt
@@ -11,15 +11,6 @@ project(agora-simple-filter)
 set(agora-lib-so ${PROJECT_SOURCE_DIR}/../agoraLibs/${CMAKE_ANDROID_ARCH_ABI}/libagora-rtc-sdk.so)
 link_libraries(${agora-lib-so})
 
-set(agora-ffmpeg-so ${PROJECT_SOURCE_DIR}/../agoraLibs/${CMAKE_ANDROID_ARCH_ABI}/libagora-ffmpeg.so)
-link_libraries(${agora-ffmpeg-so})
-
-set(agora-soundtouch-so ${PROJECT_SOURCE_DIR}/../agoraLibs/${CMAKE_ANDROID_ARCH_ABI}/libagora-soundtouch.so)
-link_libraries(${agora-soundtouch-so})
-
-set(agora-fdkaac-so ${PROJECT_SOURCE_DIR}/../agoraLibs/${CMAKE_ANDROID_ARCH_ABI}/libagora-fdkaac.so)
-link_libraries(${agora-fdkaac-so})
-
 #link opencv so
 set(opencv-lib-so ${PROJECT_SOURCE_DIR}/../jniLibs/${CMAKE_ANDROID_ARCH_ABI}/libopencv_java4.so)
 link_libraries(${opencv-lib-so})
diff --git a/Android/APIExample/agora-simple-filter/src/main/cpp/plugin_source_code/VideoProcessor.cpp b/Android/APIExample/agora-simple-filter/src/main/cpp/plugin_source_code/VideoProcessor.cpp
index 387c1324d..17fd83d42 100644
--- a/Android/APIExample/agora-simple-filter/src/main/cpp/plugin_source_code/VideoProcessor.cpp
+++ b/Android/APIExample/agora-simple-filter/src/main/cpp/plugin_source_code/VideoProcessor.cpp
@@ -33,10 +33,6 @@ namespace agora {
             if (!eglCore_) {
                 eglCore_ = new EglCore();
                 offscreenSurface_ = eglCore_->createOffscreenSurface(640, 320);
-
-            }
-            if  (!eglCore_->isCurrent(offscreenSurface_)) {
-                eglCore_->makeCurrent(offscreenSurface_);
             }
 #endif
             return true;
@@ -57,10 +53,36 @@ namespace agora {
             return true;
         }
 
+        bool WatermarkProcessor::makeCurrent() {
+            const std::lock_guard<std::mutex> lock(mutex_);
+#if defined(__ANDROID__) || defined(TARGET_OS_ANDROID)
+            if  (eglCore_ && offscreenSurface_) {
+                if (!eglCore_->isCurrent(offscreenSurface_)) {
+                    eglCore_->makeCurrent(offscreenSurface_);
+                }
+                return true;
+            }
+#endif
+            return false;
+        }
+
+        bool WatermarkProcessor::detachCurrent() {
+            const std::lock_guard<std::mutex> lock(mutex_);
+#if defined(__ANDROID__) || defined(TARGET_OS_ANDROID)
+            if  (eglCore_) {
+                eglCore_->makeNothingCurrent();
+                return true;
+            }
+#endif
+            return false;
+        }
+
         int WatermarkProcessor::processFrame(agora::rtc::VideoFrameData &capturedFrame) {
 //            PRINTF_INFO("processFrame: w: %d,  h: %d,  r: %d, enable: %d", capturedFrame.width, capturedFrame.height, capturedFrame.rotation, wmEffectEnabled_);
             if (wmEffectEnabled_) {
+                makeCurrent();
                 addWatermark(capturedFrame);
+                detachCurrent();
             }
             return 0;
         }
diff --git a/Android/APIExample/agora-simple-filter/src/main/cpp/plugin_source_code/VideoProcessor.h b/Android/APIExample/agora-simple-filter/src/main/cpp/plugin_source_code/VideoProcessor.h
index 01d85957e..75fc57ce2 100644
--- a/Android/APIExample/agora-simple-filter/src/main/cpp/plugin_source_code/VideoProcessor.h
+++ b/Android/APIExample/agora-simple-filter/src/main/cpp/plugin_source_code/VideoProcessor.h
@@ -26,6 +26,10 @@ namespace agora {
 
             bool releaseOpenGL();
 
+            bool makeCurrent();
+
+            bool detachCurrent();
+
             int processFrame(agora::rtc::VideoFrameData &capturedFrame);
 
             int setParameters(std::string parameter);