set targetSdkVersion to android-20 aka 4.4W

AndroidManifest.xml

@@ -6,10 +6,11 @@
 
     <uses-sdk
         android:minSdkVersion="9"
-        android:targetSdkVersion="17" />
+        android:targetSdkVersion="20" />
 
     <application
         android:icon="@drawable/icon"
+        android:allowBackup="false"
         android:label="@string/app_name" >
         <activity
             android:name=".FileBrowser"

project.properties

@@ -1,14 +1 @@
-# This file is automatically generated by Android Tools.
-# Do not modify this file -- YOUR CHANGES WILL BE ERASED!
-#
-# This file must be checked in Version Control Systems.
-#
-# To customize properties used by the Ant build system edit
-# "ant.properties", and override values to adapt the script to your
-# project structure.
-#
-# To enable ProGuard to shrink and obfuscate your code, uncomment this (available properties: sdk.dir, user.home):
-#proguard.config=${sdk.dir}/tools/proguard/proguard-android.txt:proguard-project.txt
-
-# Project target.
-target=android-9
+target=android-20