diff --git a/app/src/main/java/com/xypower/mpapp/MicroPhotoService.java b/app/src/main/java/com/xypower/mpapp/MicroPhotoService.java
index 0d4d2a25..ed294bda 100644
--- a/app/src/main/java/com/xypower/mpapp/MicroPhotoService.java
+++ b/app/src/main/java/com/xypower/mpapp/MicroPhotoService.java
@@ -347,7 +347,7 @@ public class MicroPhotoService extends Service {
                                 CameraAdb cameraAdb = new CameraAdb(context, appPath);
                                 cameraAdb.takePhoto();
                             }
-                        }, 20000);
+                        }, 10000 * cnt);
                     }
                 }
 
diff --git a/app/src/main/java/com/xypower/mpapp/adb/CameraAdb.java b/app/src/main/java/com/xypower/mpapp/adb/CameraAdb.java
index e3a09c2c..5693b6b6 100644
--- a/app/src/main/java/com/xypower/mpapp/adb/CameraAdb.java
+++ b/app/src/main/java/com/xypower/mpapp/adb/CameraAdb.java
@@ -61,18 +61,18 @@ public class CameraAdb {
         long takingTime = System.currentTimeMillis() / 1000;
         movePhoto(false, requestTime, takingTime);
 
+        sleep(1000);
         SysApi.forceStopApp(mContext, "com.mediatek.camera");
 
-        try {
-            Thread.sleep(2000);
-        } catch (Exception ex) {
-            ex.printStackTrace();
-        }
+        sleep(1000);
+
         requestTime = System.currentTimeMillis() / 1000;
         takePhoto(true);
         takingTime = System.currentTimeMillis() / 1000;
         movePhoto(true, requestTime, takingTime);
 
+        sleep(1000);
+
         SysApi.forceStopApp(mContext, "com.mediatek.camera");
 
         MicroPhotoService.restartApp(mContext, MicroPhotoContext.PACKAGE_NAME_MPAPP);
@@ -105,6 +105,14 @@ public class CameraAdb {
         }
     }
 
+    private void sleep(long timeout) {
+        try {
+            Thread.sleep(timeout);
+        } catch (Exception ex) {
+            ex.printStackTrace();
+        }
+    }
+
     public void takePhoto(final boolean frontCamera) {
         Dadb adb = Dadb.discover(mDeviceIp, mAdbKeyPair);