diff --git a/cloudphone/src/main/cpp/CasController.cpp b/cloudphone/src/main/cpp/CasController.cpp
index 7f73b644950921fa329cf9d966666ef47bd7c4de..634d183126e25dd8849949f588262173025ec538 100644
--- a/cloudphone/src/main/cpp/CasController.cpp
+++ b/cloudphone/src/main/cpp/CasController.cpp
@@ -957,7 +957,9 @@ void CasController::ResetDecoder(bool isClearStream)
 {
     StopDecWorker(false);
     if (isClearStream) {
-        ClearDataStream();
+        if (m_videoPacketStream != nullptr) {
+            m_videoPacketStream->Clear();
+        }
     }
     CreateDecWorker(m_nativeWindow, m_needVideoDecode);
     StartDecWorker(false);
diff --git a/cloudphone/src/main/java/com/huawei/cloudphone/apiimpl/CloudPhoneImpl.java b/cloudphone/src/main/java/com/huawei/cloudphone/apiimpl/CloudPhoneImpl.java
index 767467b00d4e20d51701bfef52a986a8fedf81cd..2cc6f83dd99d1521cda3e778c19031d29e9d20ce 100644
--- a/cloudphone/src/main/java/com/huawei/cloudphone/apiimpl/CloudPhoneImpl.java
+++ b/cloudphone/src/main/java/com/huawei/cloudphone/apiimpl/CloudPhoneImpl.java
@@ -245,6 +245,8 @@ public class CloudPhoneImpl implements ICloudPhone {
                     mCASClient.stop(false);
                     mCmdHandler = null;
                     mCurrentState = STATE_INIT;
+                    mSurfaceView.setOnTouchListener(null);
+                    mSurfaceView.setOnKeyListener(null);
                     mSurfaceView = null;
                     mActivity = null;
                     mViewGroup = null;
diff --git a/cloudphone/src/main/java/com/huawei/cloudphone/virtualdevice/camera/VirtualCamera.java b/cloudphone/src/main/java/com/huawei/cloudphone/virtualdevice/camera/VirtualCamera.java
index 2f2a9c78ae355f54dad40fc6b1adc5b37234fe4b..97112bed11cf89631b5f1961903e5acfe5e0ae88 100644
--- a/cloudphone/src/main/java/com/huawei/cloudphone/virtualdevice/camera/VirtualCamera.java
+++ b/cloudphone/src/main/java/com/huawei/cloudphone/virtualdevice/camera/VirtualCamera.java
@@ -50,7 +50,6 @@ public class VirtualCamera implements Camera.PreviewCallback {
     private Camera mCamera = null;
     private static final int LOG_LENGTH_LIMIT = 2000;
     private static final int SIZE_WIDTH_LIMIT = 1280;
-    private static final int JPEG_BUFFER_SIZE = 8 * 1024 * 1024;
     private static final int DEFAULT_WIDTH = 640;
     private static final int DEFAULT_HEIGHT = 480;
 
@@ -61,7 +60,6 @@ public class VirtualCamera implements Camera.PreviewCallback {
     private SurfaceHolder mSurfaceHolder;
     private boolean mIsUseH264;
 
-    private ByteArrayOutputStream jpegBuffer = new ByteArrayOutputStream(JPEG_BUFFER_SIZE);
     private Camera.CameraInfo cameraInfo = new Camera.CameraInfo();
     private IVirtualDeviceDataListener mCameraListener = null;
     private byte[] mPreviewBuffer = null;
@@ -211,26 +209,11 @@ public class VirtualCamera implements Camera.PreviewCallback {
     public void onPreviewFrame(byte[] data, Camera camera) {
         Camera.Size size = camera.getParameters().getPreviewSize();
         if (mIsUseH264) compressWithH264(data);
-        else compressWithMPEG(data, size.width, size.height);
         if (mSurfaceTexture != null) {
             camera.addCallbackBuffer(mPreviewBuffer);
         }
     }
 
-    private void compressWithMPEG(byte[] data, int width, int height) {
-        YuvImage image = new YuvImage(data, ImageFormat.NV21, width, height, null);
-        jpegBuffer.reset();
-        int quality = 50;
-        if (!image.compressToJpeg(new Rect(0, 0, width, height), quality, jpegBuffer)) {
-            Log.e(TAG, "compressWithMPEG: failed to compress to jpeg");
-            return;
-        }
-        if (mCameraListener != null) {
-            byte[] jpegData = jpegBuffer.toByteArray();
-            mCameraListener.onRecvData(jpegData, jpegData.length, mCameraId);
-        }
-    }
-
     private void compressWithH264(byte[] data) {
         mAvcCodec.offerEncoder(data, mH264Buffer);
     }
diff --git a/cloudphone/src/main/java/com/huawei/cloudphone/virtualdevice/sensor/VirtualSensorManager.java b/cloudphone/src/main/java/com/huawei/cloudphone/virtualdevice/sensor/VirtualSensorManager.java
index 9e780bc919aa99ba0433f761c66061e5f81c2570..d898a304683bd15cf62c4c54bea60c91dbdac287 100644
--- a/cloudphone/src/main/java/com/huawei/cloudphone/virtualdevice/sensor/VirtualSensorManager.java
+++ b/cloudphone/src/main/java/com/huawei/cloudphone/virtualdevice/sensor/VirtualSensorManager.java
@@ -70,6 +70,7 @@ public class VirtualSensorManager extends VirtualDeviceManager {
     }
 
     public void stop() {
+        mVirtualSensor.stopProcess();
         int rspMsgLen = MSG_HEADER_LEN;
         MsgHeader header = new MsgHeader(OPT_SENSOR_DISABLE_REQ, DEV_TYPE_SENSOR, DEV_GYROSCOPE, rspMsgLen);
         mVirtualDeviceProtocol.sendMsg(header, null, SENSOR_DATA);