diff --git a/model_zoo/official/lite/MindSpore_inhand/dance/src/main/java/com/mindspore/dance/view/DanceActivity.java b/model_zoo/official/lite/MindSpore_inhand/dance/src/main/java/com/mindspore/dance/view/DanceActivity.java
index e2d6c15f6f1ea3fd36f473d81cf629ab356fca2b..faa5d48dd1c480003973ac9021e349a08fa71d50 100644
--- a/model_zoo/official/lite/MindSpore_inhand/dance/src/main/java/com/mindspore/dance/view/DanceActivity.java
+++ b/model_zoo/official/lite/MindSpore_inhand/dance/src/main/java/com/mindspore/dance/view/DanceActivity.java
@@ -48,4 +48,9 @@ public class DanceActivity extends AppCompatActivity {
 
     }
 
+    @Override
+    public void onBackPressed() {
+        finish();
+    }
+
 }
diff --git a/model_zoo/official/lite/MindSpore_inhand/dance/src/main/java/com/mindspore/dance/view/fragment/RunFragment.java b/model_zoo/official/lite/MindSpore_inhand/dance/src/main/java/com/mindspore/dance/view/fragment/RunFragment.java
index a51d1361b4702d632a0854952e41a11b0c85e912..d41b84c8abbff9ed4393ed20abd3ec230f91255e 100644
--- a/model_zoo/official/lite/MindSpore_inhand/dance/src/main/java/com/mindspore/dance/view/fragment/RunFragment.java
+++ b/model_zoo/official/lite/MindSpore_inhand/dance/src/main/java/com/mindspore/dance/view/fragment/RunFragment.java
@@ -18,9 +18,9 @@ package com.mindspore.dance.view.fragment;
 
 import android.annotation.SuppressLint;
 import android.media.MediaPlayer;
-import android.os.Build;
 import android.os.Bundle;
 import android.os.Handler;
+import android.os.Message;
 import android.util.Log;
 import android.view.Gravity;
 import android.view.LayoutInflater;
@@ -33,11 +33,8 @@ import android.widget.MediaController;
 import android.widget.TextView;
 
 import androidx.annotation.NonNull;
-import androidx.annotation.RequiresApi;
-import androidx.camera.camera2.Camera2Config;
 import androidx.camera.core.Camera;
 import androidx.camera.core.CameraSelector;
-import androidx.camera.core.CameraXConfig;
 import androidx.camera.core.Preview;
 import androidx.camera.lifecycle.ProcessCameraProvider;
 import androidx.camera.view.PreviewView;
@@ -53,9 +50,15 @@ import com.mindspore.dance.present.video.MyVideoView;
 import com.mindspore.dance.task.SampleTask;
 import com.mindspore.dance.util.Tools;
 
+import java.lang.ref.WeakReference;
+import java.util.Timer;
+import java.util.TimerTask;
 import java.util.concurrent.ExecutionException;
 
 public class RunFragment extends Fragment {
+    private final static int COUNT_DOWN_1 = 1;
+    private final static int COUNT_DOWN_2 = 2;
+    private final static int COUNT_DOWN_3 = 3;
     private final String TAG = RunFragment.class.getSimpleName();
     private FrameLayout root;
     private MyVideoView videoView;
@@ -64,9 +67,10 @@ public class RunFragment extends Fragment {
     private SampleTask sampleTask;
     private TextView countdownView;
     private ImageView info;
-    private Handler handler;
-    private final int NEED_CANCEL = -1;
     private MediaController mediaController;
+    private int timeWhat;
+    private Handler mHandler;
+    private Timer timer;
 
     @Override
     public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
@@ -77,7 +81,7 @@ public class RunFragment extends Fragment {
     public void onViewCreated(@NonNull View view, Bundle savedInstanceState) {
         super.onViewCreated(view, savedInstanceState);
         root = view.findViewById(R.id.root);
-        handler = new Handler();
+        mHandler = new MyHandler(this);
         mediaController = new MediaController(this.getContext());
         initView();
 
@@ -99,27 +103,70 @@ public class RunFragment extends Fragment {
         }
     }
 
-    @RequiresApi(api = Build.VERSION_CODES.P)
+    private void setTimer() {
+        timer.schedule(new TimerTask() {
+            @Override
+            public void run() {
+                Thread thread = new Thread(new Runnable() {
+                    @Override
+                    public void run() {
+                        Log.d(TAG, "run this thread:"+android.os.Process.myTid());
+                        Message message = new Message();
+                        message.what = timeWhat;
+                        timeWhat++;
+                        mHandler.sendMessage(message);
+                    }
+                });
+                thread.start();
+            }
+        }, 1000, 1000);
+    }
+
+    private static class MyHandler extends Handler {
+
+        private WeakReference<RunFragment> weakReference;
+
+        public MyHandler(RunFragment fragment) {
+            weakReference = new WeakReference<>(fragment);
+        }
+
+        public void handleMessage(Message msg) {
+            RunFragment thisFragment = this.weakReference.get();
+            switch (msg.what) {
+                case COUNT_DOWN_1:
+                    thisFragment.info.setVisibility(View.VISIBLE);
+                    thisFragment.info.setBackgroundResource(R.drawable.countdown_two);
+                    break;
+                case COUNT_DOWN_2:
+                    thisFragment.info.setVisibility(View.VISIBLE);
+                    thisFragment.info.setBackgroundResource(R.drawable.countdown_one);
+                    break;
+                case COUNT_DOWN_3:
+                    thisFragment.beginPlay();
+                    thisFragment.info.setVisibility(View.GONE);
+                    break;
+                default:
+                    thisFragment.timer.cancel();
+                    break;
+            }
+            super.handleMessage(msg);
+        }
+    }
+
     @Override
     public void onResume() {
+        super.onResume();
         info.setVisibility(View.VISIBLE);
         info.setBackgroundResource(R.drawable.countdown_three);
-        super.onResume();
-        handler.postDelayed(() -> {
-            //execute the task
-            info.setVisibility(View.VISIBLE);
-            info.setBackgroundResource(R.drawable.countdown_two);
-        }, NEED_CANCEL, 1000);
-        handler.postDelayed(() -> {
-            //execute the task
-            info.setVisibility(View.VISIBLE);
-            info.setBackgroundResource(R.drawable.countdown_one);
-        }, NEED_CANCEL, 2000);
-        handler.postDelayed(() -> {
-            //execute the task
-            beginPlay();
-            info.setVisibility(View.GONE);
-        }, NEED_CANCEL, 3080);
+        timer = new Timer();
+        timeWhat = COUNT_DOWN_1;
+        setTimer();
+    }
+
+    @Override
+    public void onDestroy() {
+        super.onDestroy();
+        mHandler = null;
     }
 
     private void start() {
@@ -142,7 +189,7 @@ public class RunFragment extends Fragment {
     @Override
     public void onPause() {
         super.onPause();
-        handler.removeMessages(NEED_CANCEL);
+        timer.cancel();
         if (sampleTask != null) {
             sampleTask.setNeedStop(true);
             sampleTask.clear();
@@ -225,6 +272,6 @@ public class RunFragment extends Fragment {
         backButton.setOnClickListener(view -> {
             getActivity().finish();
         });
-        Tools.addView(getActivity(), root, backButton, 0.1f, 0.2f, 0.12f, 0.1f);
+        Tools.addView(getActivity(), root, backButton, 0.1f, 0.2f, 0.20f, 0.1f);
     }
 }