diff --git a/app/src/main/java/com/xypower/mpremote/DeviceActivity.java b/app/src/main/java/com/xypower/mpremote/DeviceActivity.java
index 210d5a6..c748077 100644
--- a/app/src/main/java/com/xypower/mpremote/DeviceActivity.java
+++ b/app/src/main/java/com/xypower/mpremote/DeviceActivity.java
@@ -288,7 +288,7 @@ public class DeviceActivity extends AppCompatActivity {
                 }
 
                 String remoteFilePath = REMOTE_PATH_TMP + "bv.txt";
-                String cmd = "am stack start -n " + PACKAGE_NAME_MP + "/" + PACKAGE_NAME_MP + ".BridgeActivity --es action \"query_bv\" --es path \"" + remoteFilePath + "\"";
+                String cmd = "am start -n " + PACKAGE_NAME_MP + "/" + PACKAGE_NAME_MP + ".BridgeActivity --es action \"query_bv\" --es path \"" + remoteFilePath + "\"";
                 adbShellResponse = null;
                 try {
                     adbShellResponse = adb.shell(cmd);
@@ -473,7 +473,7 @@ public class DeviceActivity extends AppCompatActivity {
             usb = (usbCamera != 0) ? "true" : "false";
             cameraId = channelJson.optInt("cameraId", cameraId);
         }
-        final String cmd = "am stack start -n " + PACKAGE_NAME_MP + "/" + PACKAGE_NAME_MP + ".BridgeActivity --es action \"take_photo\" --es path \""
+        final String cmd = "am start -n " + PACKAGE_NAME_MP + "/" + PACKAGE_NAME_MP + ".BridgeActivity --es action \"take_photo\" --es path \""
                 + remoteFilePath + "\" --ez usb " + usb + " --ei cameraId " + Integer.toString(cameraId) + " --ei channel "
                 + Integer.toString(channel) + " --ei preset " + Integer.toString(preset) + " --es leftTopOsd \"" + leftTopOsd + "\"";
         // adbShellResponse = null;
@@ -525,7 +525,7 @@ public class DeviceActivity extends AppCompatActivity {
             height = channelJson.optInt("videoCY", height);
         }
 
-        final String cmd = "am stack start -n " + PACKAGE_NAME_MP + "/" + PACKAGE_NAME_MP + ".BridgeActivity --es action \"recording\" --es path \""
+        final String cmd = "am start -n " + PACKAGE_NAME_MP + "/" + PACKAGE_NAME_MP + ".BridgeActivity --es action \"recording\" --es path \""
                 + remoteFilePath + "\" --ez usb " + usb + " --ei cameraId " + Integer.toString(cameraId) + " --ei channel "
                 + Integer.toString(channel) + " --ei preset " + Integer.toString(preset) + " --ei duration " + Integer.toString(duration)
                 + " --el videoId " + Long.toString(dt.getTime() / 1000) + " --ei width " + Integer.toString(height) + " --ei height "