diff --git a/src/com/android/bluetooth/AlertActivity.java b/src/com/android/bluetooth/AlertActivity.java
index 6de2cec..e45c770 100644
--- a/src/com/android/bluetooth/AlertActivity.java
+++ b/src/com/android/bluetooth/AlertActivity.java
@@ -16,6 +16,8 @@
 
 package android.bluetooth;
 
+import static android.view.WindowManager.LayoutParams.SYSTEM_FLAG_HIDE_NON_SYSTEM_OVERLAY_WINDOWS;
+
 import android.app.Activity;
 import android.app.AlertDialog;
 import android.app.Dialog;
@@ -46,6 +48,8 @@
     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
+
+        getWindow().addPrivateFlags(SYSTEM_FLAG_HIDE_NON_SYSTEM_OVERLAY_WINDOWS);
         requestWindowFeature(Window.FEATURE_NO_TITLE);
         mAlertBuilder = new AlertDialog.Builder(this);
         mAlertBuilder.setOnDismissListener(this);
diff --git a/src/com/android/bluetooth/opp/BluetoothOppBtEnableActivity.java b/src/com/android/bluetooth/opp/BluetoothOppBtEnableActivity.java
index 8a4d149..6c598dc 100644
--- a/src/com/android/bluetooth/opp/BluetoothOppBtEnableActivity.java
+++ b/src/com/android/bluetooth/opp/BluetoothOppBtEnableActivity.java
@@ -32,6 +32,8 @@
 
 package com.android.bluetooth.opp;
 
+import static android.view.WindowManager.LayoutParams.SYSTEM_FLAG_HIDE_NON_SYSTEM_OVERLAY_WINDOWS;
+
 import android.bluetooth.AlertActivity;
 import android.content.DialogInterface;
 import android.content.Intent;
@@ -53,6 +55,7 @@
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
 
+        getWindow().addPrivateFlags(SYSTEM_FLAG_HIDE_NON_SYSTEM_OVERLAY_WINDOWS);
         // Set up the "dialog"
         mOppManager = BluetoothOppManager.getInstance(this);
         mOppManager.mSendingFlag = false;
diff --git a/src/com/android/bluetooth/opp/BluetoothOppBtEnablingActivity.java b/src/com/android/bluetooth/opp/BluetoothOppBtEnablingActivity.java
index cde530c..9d8cf32 100644
--- a/src/com/android/bluetooth/opp/BluetoothOppBtEnablingActivity.java
+++ b/src/com/android/bluetooth/opp/BluetoothOppBtEnablingActivity.java
@@ -32,6 +32,8 @@
 
 package com.android.bluetooth.opp;
 
+import static android.view.WindowManager.LayoutParams.SYSTEM_FLAG_HIDE_NON_SYSTEM_OVERLAY_WINDOWS;
+
 import android.bluetooth.AlertActivity;
 import android.bluetooth.BluetoothAdapter;
 import android.content.BroadcastReceiver;
@@ -68,6 +70,7 @@
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
 
+        getWindow().addPrivateFlags(SYSTEM_FLAG_HIDE_NON_SYSTEM_OVERLAY_WINDOWS);
         // If BT is already enabled jus return.
         BluetoothAdapter adapter = BluetoothAdapter.getDefaultAdapter();
         if (adapter.isEnabled()) {
diff --git a/src/com/android/bluetooth/opp/BluetoothOppBtErrorActivity.java b/src/com/android/bluetooth/opp/BluetoothOppBtErrorActivity.java
index f78e32d..2d60b5f 100644
--- a/src/com/android/bluetooth/opp/BluetoothOppBtErrorActivity.java
+++ b/src/com/android/bluetooth/opp/BluetoothOppBtErrorActivity.java
@@ -32,6 +32,8 @@
 
 package com.android.bluetooth.opp;
 
+import static android.view.WindowManager.LayoutParams.SYSTEM_FLAG_HIDE_NON_SYSTEM_OVERLAY_WINDOWS;
+
 import android.bluetooth.AlertActivity;
 import android.content.DialogInterface;
 import android.content.Intent;
@@ -51,6 +53,7 @@
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
 
+        getWindow().addPrivateFlags(SYSTEM_FLAG_HIDE_NON_SYSTEM_OVERLAY_WINDOWS);
         Intent intent = getIntent();
         String errorTitle = intent.getStringExtra("title");
         String errorContent = intent.getStringExtra("content");
diff --git a/src/com/android/bluetooth/opp/BluetoothOppIncomingFileConfirmActivity.java b/src/com/android/bluetooth/opp/BluetoothOppIncomingFileConfirmActivity.java
index 8a887ee..28e6b99 100644
--- a/src/com/android/bluetooth/opp/BluetoothOppIncomingFileConfirmActivity.java
+++ b/src/com/android/bluetooth/opp/BluetoothOppIncomingFileConfirmActivity.java
@@ -32,6 +32,8 @@
 
 package com.android.bluetooth.opp;
 
+import static android.view.WindowManager.LayoutParams.SYSTEM_FLAG_HIDE_NON_SYSTEM_OVERLAY_WINDOWS;
+
 import android.bluetooth.AlertActivity;
 import android.content.BroadcastReceiver;
 import android.content.ContentValues;
@@ -93,6 +95,7 @@
         }
         super.onCreate(savedInstanceState);
 
+        getWindow().addPrivateFlags(SYSTEM_FLAG_HIDE_NON_SYSTEM_OVERLAY_WINDOWS);
         Intent intent = getIntent();
         mUri = intent.getData();
         mTransInfo = new BluetoothOppTransferInfo();
diff --git a/src/com/android/bluetooth/opp/BluetoothOppLauncherActivity.java b/src/com/android/bluetooth/opp/BluetoothOppLauncherActivity.java
index 1a15adb..b63bc0c 100644
--- a/src/com/android/bluetooth/opp/BluetoothOppLauncherActivity.java
+++ b/src/com/android/bluetooth/opp/BluetoothOppLauncherActivity.java
@@ -32,6 +32,8 @@
 
 package com.android.bluetooth.opp;
 
+import static android.view.WindowManager.LayoutParams.SYSTEM_FLAG_HIDE_NON_SYSTEM_OVERLAY_WINDOWS;
+
 import android.app.Activity;
 import android.bluetooth.BluetoothDevicePicker;
 import android.content.ContentResolver;
@@ -73,6 +75,7 @@
     public void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
 
+        getWindow().addPrivateFlags(SYSTEM_FLAG_HIDE_NON_SYSTEM_OVERLAY_WINDOWS);
         Intent intent = getIntent();
         String action = intent.getAction();
         if (action == null) {
diff --git a/src/com/android/bluetooth/opp/BluetoothOppTransferActivity.java b/src/com/android/bluetooth/opp/BluetoothOppTransferActivity.java
index 2272936..73a7a61 100644
--- a/src/com/android/bluetooth/opp/BluetoothOppTransferActivity.java
+++ b/src/com/android/bluetooth/opp/BluetoothOppTransferActivity.java
@@ -32,6 +32,8 @@
 
 package com.android.bluetooth.opp;
 
+import static android.view.WindowManager.LayoutParams.SYSTEM_FLAG_HIDE_NON_SYSTEM_OVERLAY_WINDOWS;
+
 import android.app.NotificationManager;
 import android.bluetooth.AlertActivity;
 import android.bluetooth.BluetoothAdapter;
@@ -129,6 +131,8 @@
     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
+
+        getWindow().addPrivateFlags(SYSTEM_FLAG_HIDE_NON_SYSTEM_OVERLAY_WINDOWS);
         Intent intent = getIntent();
         mUri = intent.getData();
 
diff --git a/src/com/android/bluetooth/pbap/BluetoothPbapActivity.java b/src/com/android/bluetooth/pbap/BluetoothPbapActivity.java
index 3da71e0..000dd00 100644
--- a/src/com/android/bluetooth/pbap/BluetoothPbapActivity.java
+++ b/src/com/android/bluetooth/pbap/BluetoothPbapActivity.java
@@ -32,6 +32,8 @@
 
 package com.android.bluetooth.pbap;
 
+import static android.view.WindowManager.LayoutParams.SYSTEM_FLAG_HIDE_NON_SYSTEM_OVERLAY_WINDOWS;
+
 import android.bluetooth.AlertActivity;
 import android.bluetooth.BluetoothDevice;
 import android.content.BroadcastReceiver;
@@ -102,6 +104,8 @@
     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
+
+        getWindow().addPrivateFlags(SYSTEM_FLAG_HIDE_NON_SYSTEM_OVERLAY_WINDOWS);
         Intent i = getIntent();
         String action = i.getAction();
         mDevice = i.getParcelableExtra(BluetoothPbapService.EXTRA_DEVICE);