diff --git a/iFish7/src/main/java/com/ifish/activity/MainTabActivity.java b/iFish7/src/main/java/com/ifish/activity/MainTabActivity.java
index 4f09422dc..5341c4a0e 100644
--- a/iFish7/src/main/java/com/ifish/activity/MainTabActivity.java
+++ b/iFish7/src/main/java/com/ifish/activity/MainTabActivity.java
@@ -19,6 +19,7 @@ import android.os.Handler;
 import android.text.TextUtils;
 import android.util.Log;
 import android.util.SparseArray;
+import android.view.KeyEvent;
 import android.view.View;
 import android.view.Window;
 import android.widget.Button;
@@ -582,6 +583,9 @@ public class MainTabActivity extends BaseFragmentActivity {
         DeviceOffLine();
     }
 
+
+
+
     private void userActivitiesCount() {
         if (userActivitiesFlag) {
             userActivitiesFlag = false;
@@ -699,4 +703,61 @@ public class MainTabActivity extends BaseFragmentActivity {
     }
 
 
+    private long exitTime = 0;
+
+    @Override
+    public boolean onKeyDown(int keyCode, KeyEvent event) {
+        if (keyCode == KeyEvent.KEYCODE_BACK && event.getAction() == KeyEvent.ACTION_DOWN) {
+            if ((System.currentTimeMillis() - exitTime) > 3000) {
+                ToastUtil.show(this,"再按一次退出程序");
+                exitTime = System.currentTimeMillis();
+                return true;
+            } else {
+                ActivityManager.getInstance().exit();
+                return super.onKeyDown(keyCode, event);
+            }
+        }
+        return super.onKeyDown(keyCode, event);
+    }
+
+    public void onEventMainThread(EventBean event) {
+        if (event!=null){
+            switch (event.index) {
+                case -1:
+                    startDownTimer();
+                    break;
+                case 1:
+                    closeDownTimer();
+                    break;
+                default:
+
+                    break;
+            }
+        }
+    }
+
+    CountDownTimer countDownTimer;
+    public  void  startDownTimer(){
+        closeDownTimer();
+        countDownTimer = new CountDownTimer(900000,1000) {
+            @Override
+            public void onTick(long l) {
+                L.i("----------------------"+l/1000);
+            }
+
+            @Override
+            public void onFinish() {
+                ActivityManager.getInstance().exit();
+            }
+        };
+
+        countDownTimer.start();
+    }
+
+    public void  closeDownTimer(){
+        if (countDownTimer!=null){
+            countDownTimer.cancel();
+            countDownTimer = null;
+        }
+    }
 }
diff --git a/iFish7/src/main/java/com/ifish/basebean/EventBean.java b/iFish7/src/main/java/com/ifish/basebean/EventBean.java
index d31933755..d3c027d8d 100644
--- a/iFish7/src/main/java/com/ifish/basebean/EventBean.java
+++ b/iFish7/src/main/java/com/ifish/basebean/EventBean.java
@@ -12,7 +12,7 @@ public class EventBean {
     public   int index = 0;
     //  jiablue
 //    public static  String BLUETOOTH_START_SCAN = "start_scan";
-//    public  static  String BLUETOOTH_STOP_SCAN = "stop_scan";
+    public  static  String BACK_STAGE = "back_stage";
     public  static  String TAB_INDEX = "tab_index";
     public  static  String LINK_FINISH = "link_finish";
     public  static  String CHANGE_DEVICE_NAME = "change_device_name";
diff --git a/iFish7/src/main/java/com/ifish/baseclass/BaseApplication.java b/iFish7/src/main/java/com/ifish/baseclass/BaseApplication.java
index 574c47061..2e400944b 100644
--- a/iFish7/src/main/java/com/ifish/baseclass/BaseApplication.java
+++ b/iFish7/src/main/java/com/ifish/baseclass/BaseApplication.java
@@ -22,6 +22,7 @@ import androidx.multidex.MultiDexApplication;
 //import com.clj.fastble.BleManager;
 //import com.clj.fastble.scan.BleScanRuleConfig;
 import com.ifish.activity.BuildConfig;
+import com.ifish.basebean.EventBean;
 import com.ifish.utils.ActivityManager;
 import com.ifish.utils.ImageDownLoader;
 import com.ifish.utils.L;
@@ -41,6 +42,8 @@ import javax.net.ssl.SSLContext;
 import javax.net.ssl.SSLSession;
 import javax.net.ssl.SSLSocketFactory;
 import javax.net.ssl.TrustManager;
+
+import de.greenrobot.event.EventBus;
 import okhttp3.OkHttpClient;
 
 /**
@@ -101,12 +104,14 @@ public class BaseApplication extends MultiDexApplication {
             @Override
             public void onActivityStarted(@NonNull Activity activity) {
                 if (count==0){
-                    Activity activityName = ActivityManager.getInstance().lastActivity();
-                    if (activityName!=null && activityName.toString().contains("MainTabActivity")){
-                        //  jiablue
-//                        EventBean eventBean = new EventBean(EventBean.BLUETOOTH_START_SCAN);
-//                        EventBus.getDefault().post(eventBean);
-                    }
+                    EventBean eventBean = new EventBean(EventBean.BACK_STAGE,1);
+                    EventBus.getDefault().post(eventBean);
+//                    Activity activityName = ActivityManager.getInstance().lastActivity();
+//                    if (activityName!=null && activityName.toString().contains("MainTabActivity")){
+//                        //  jiablue
+////                        EventBean eventBean = new EventBean(EventBean.BLUETOOTH_START_SCAN);
+////                        EventBus.getDefault().post(eventBean);
+//                    }
                 }
                 count++;
 
@@ -126,12 +131,13 @@ public class BaseApplication extends MultiDexApplication {
             public void onActivityStopped(@NonNull Activity activity) {
                 count--;
                 if (count==0){
-                    Activity activityName = ActivityManager.getInstance().lastActivity();
-                    if (activityName!=null && activityName.toString().contains("MainTabActivity")){
-                        //  jiablue
-//                        EventBean eventBean = new EventBean(EventBean.BLUETOOTH_STOP_SCAN);
-//                        EventBus.getDefault().post(eventBean);
-                    }
+                    EventBean eventBean = new EventBean(EventBean.BACK_STAGE,-1);
+                    EventBus.getDefault().post(eventBean);
+//                    Activity activityName = ActivityManager.getInstance().lastActivity();
+//                    if (activityName!=null && activityName.toString().contains("MainTabActivity")){
+//                        //  jiablue
+//
+//                    }
                 }
             }