diff --git a/android/occlusionquery/AndroidManifest.xml b/android/occlusionquery/AndroidManifest.xml
index 8541bf9d..cde9428a 100644
--- a/android/occlusionquery/AndroidManifest.xml
+++ b/android/occlusionquery/AndroidManifest.xml
@@ -15,6 +15,7 @@
                 android:label="Occlusion query"
                 android:theme="@android:style/Theme.NoTitleBar.Fullscreen"
 				android:launchMode="singleTask"
+                android:screenOrientation="landscape"
                 android:configChanges="orientation|screenSize|keyboardHidden">
 			<meta-data android:name="android.app.lib_name" android:value="vulkanOcclusionquery" />
 			<intent-filter>
diff --git a/android/occlusionquery/build.bat b/android/occlusionquery/build.bat
deleted file mode 100644
index 6d991c44..00000000
--- a/android/occlusionquery/build.bat
+++ /dev/null
@@ -1,26 +0,0 @@
-cd jni
-call ndk-build
-if %ERRORLEVEL% EQU 0 (
-	echo ndk-build has failed, build cancelled
-	cd..
-
-	mkdir "assets\shaders\base"
-	xcopy "..\..\data\shaders\base\*.spv" "assets\shaders\base" /Y
-	
-
-	mkdir "assets\shaders\occlusionquery"
-	xcopy "..\..\data\shaders\occlusionquery\*.spv" "assets\shaders\occlusionquery" /Y
-
-	mkdir "assets\models"
-	xcopy "..\..\data\models\plane_z.3ds" "assets\models" /Y 
-	xcopy "..\..\data\models\teapot.3ds" "assets\models" /Y 
-	xcopy "..\..\data\models\sphere.3ds" "assets\models" /Y 
-	
-	mkdir "res\drawable"
-	xcopy "..\..\android\images\icon.png" "res\drawable" /Y
-
-	call ant debug -Dout.final.file=vulkanOcclusionquery.apk
-) ELSE (
-	echo error : ndk-build failed with errors!
-	cd..
-)
diff --git a/android/occlusionquery/build.py b/android/occlusionquery/build.py
new file mode 100644
index 00000000..2f6ab4d6
--- /dev/null
+++ b/android/occlusionquery/build.py
@@ -0,0 +1,48 @@
+import os
+import shutil
+import subprocess
+import sys
+import glob
+
+sys.path.append('../base/')
+
+import base
+
+APK_NAME = "vulkanOcclusionquery"
+APP_TITLE = "Occlusion queries"
+SHADER_DIR = "occlusionquery"
+ASSETS_MODELS = ["plane_z.3ds", "teapot.3ds", "sphere.3ds"]
+
+if subprocess.call("ndk-build", shell=True) == 0:   
+    print("Build successful")
+
+    # Assets
+    os.makedirs("./assets/shaders", exist_ok=True)
+    os.makedirs("./assets/shaders/base", exist_ok=True)
+    os.makedirs("./assets/shaders/%s" % SHADER_DIR, exist_ok=True)    
+    os.makedirs("./assets/models", exist_ok=True)
+    os.makedirs("./res/drawable", exist_ok=True)
+
+    # Shaders    
+    # Base
+    for file in glob.glob("../../data/shaders/base/*.spv"):
+        shutil.copy(file, "./assets/shaders/base")    
+    # Sample
+    for file in glob.glob("../../data/shaders/%s/*.spv" %SHADER_DIR):
+        shutil.copy(file, "./assets/shaders/%s" % SHADER_DIR)    
+    # Models
+    for file in ASSETS_MODELS:        
+        shutil.copy("../../data/models/%s" % file, "./assets/models")
+
+    # Icon
+    shutil.copy("../../android/images/icon.png", "./res/drawable")      
+
+    if subprocess.call("ant debug -Dout.final.file=%s.apk" % APK_NAME, shell=True) == 0:
+        if len(sys.argv) > 1:
+            if sys.argv[1] == "-deploy":
+                if subprocess.call("adb install -r %s.apk" % APK_NAME, shell=True) != 0:
+                    print("Could not deploy to device!")
+    else:
+        print("Error during build process!")
+else:
+    print("Error building project!")
\ No newline at end of file
diff --git a/android/offscreen/AndroidManifest.xml b/android/offscreen/AndroidManifest.xml
index a3a83002..2e20569f 100644
--- a/android/offscreen/AndroidManifest.xml
+++ b/android/offscreen/AndroidManifest.xml
@@ -15,6 +15,7 @@
                 android:label="Offscreen"
                 android:theme="@android:style/Theme.NoTitleBar.Fullscreen"
 				android:launchMode="singleTask"
+                android:screenOrientation="landscape"
                 android:configChanges="orientation|screenSize|keyboardHidden">
 			<meta-data android:name="android.app.lib_name" android:value="vulkanOffscreen" />
 			<intent-filter>
diff --git a/android/offscreen/build.bat b/android/offscreen/build.bat
deleted file mode 100644
index bb748821..00000000
--- a/android/offscreen/build.bat
+++ /dev/null
@@ -1,28 +0,0 @@
-cd jni
-call ndk-build
-if %ERRORLEVEL% EQU 0 (
-	echo ndk-build has failed, build cancelled
-	cd..
-
-	mkdir "assets\shaders\base"
-	xcopy "..\..\data\shaders\base\*.spv" "assets\shaders\base" /Y
-	
-
-	mkdir "assets\shaders\offscreen"
-	xcopy "..\..\data\shaders\offscreen\*.spv" "assets\shaders\offscreen" /Y
-
-	mkdir "assets\textures"
-	xcopy "..\..\data\textures\darkmetal_bc3.ktx" "assets\textures" /Y
-
-	mkdir "assets\models"
-	xcopy "..\..\data\models\plane.obj" "assets\models" /Y 
-	xcopy "..\..\data\models\chinesedragon.dae" "assets\models" /Y 
-	
-	mkdir "res\drawable"
-	xcopy "..\..\android\images\icon.png" "res\drawable" /Y
-
-	call ant debug -Dout.final.file=vulkanOffscreen.apk
-) ELSE (
-	echo error : ndk-build failed with errors!
-	cd..
-)
\ No newline at end of file
diff --git a/android/offscreen/build.py b/android/offscreen/build.py
new file mode 100644
index 00000000..759008b6
--- /dev/null
+++ b/android/offscreen/build.py
@@ -0,0 +1,53 @@
+import os
+import shutil
+import subprocess
+import sys
+import glob
+
+APK_NAME = "vulkanOffscreen"
+SHADER_DIR = "offscreen"
+ASSETS_MODELS = ["plane.obj", "chinesedragon.dae"]
+ASSETS_TEXTURES = ["darkmetal_bc3_unorm.ktx", "stonefloor01_color_bc3_unorm.ktx", "darkmetal_astc_8x8_unorm.ktx", "darkmetal_etc2_unorm.ktx"]
+
+if subprocess.call("ndk-build", shell=True) == 0:   
+    print("Build successful")
+
+    # Assets
+    if not os.path.exists("./assets"):
+        os.makedirs("./assets")  
+
+    # Shaders    
+    # Base
+    if not os.path.exists("./assets/shaders/base"):
+        os.makedirs("./assets/shaders/base")           
+    for file in glob.glob("../../data/shaders/base/*.spv"):
+        shutil.copy(file, "./assets/shaders/base")    
+    # Sample
+    if not os.path.exists("./assets/shaders/%s" % SHADER_DIR):
+        os.makedirs("./assets/shaders/%s" % SHADER_DIR)
+    for file in glob.glob("../../data/shaders/%s/*.spv" %SHADER_DIR):
+        shutil.copy(file, "./assets/shaders/%s" % SHADER_DIR)          
+    # Textures and models
+    if not os.path.exists("./assets/textures"):
+        os.makedirs("./assets/textures")           
+    for file in ASSETS_TEXTURES:
+        shutil.copy("../../data/textures/%s" % file, "./assets/textures")       
+    if not os.path.exists("./assets/models"):
+        os.makedirs("./assets/models")           
+    for file in ASSETS_MODELS:
+        shutil.copy("../../data/models/%s" % file, "./assets/models")            
+
+    # Icon
+    if not os.path.exists("./res/drawable"):
+        os.makedirs("./res/drawable")         
+    shutil.copy("../../android/images/icon.png", "./res/drawable")      
+
+    if subprocess.call("ant debug -Dout.final.file=%s.apk" % APK_NAME, shell=True) == 0:
+        if len(sys.argv) > 1:
+            if sys.argv[1] == "-deploy":
+                if subprocess.call("adb install -r %s.apk" % APK_NAME, shell=True) != 0:
+                    print("Could not deploy to device!")
+    else:
+        print("Error during build process!")
+else:
+    print("Error building project!")
diff --git a/android/pbrbasic/AndroidManifest.xml b/android/pbrbasic/AndroidManifest.xml
index cf06f372..537ac5a9 100644
--- a/android/pbrbasic/AndroidManifest.xml
+++ b/android/pbrbasic/AndroidManifest.xml
@@ -15,6 +15,7 @@
                 android:label="Physical based rendering"
                 android:theme="@android:style/Theme.NoTitleBar.Fullscreen"
 				android:launchMode="singleTask"
+                android:screenOrientation="landscape"                
                 android:configChanges="orientation|screenSize|keyboardHidden">
 			<meta-data android:name="android.app.lib_name" android:value="vulkanPBRBasic" />
 			<intent-filter>
diff --git a/android/pbribl/AndroidManifest.xml b/android/pbribl/AndroidManifest.xml
index 2898946c..75fc78c1 100644
--- a/android/pbribl/AndroidManifest.xml
+++ b/android/pbribl/AndroidManifest.xml
@@ -15,6 +15,7 @@
                 android:label="PBR Image based lighting"
                 android:theme="@android:style/Theme.NoTitleBar.Fullscreen"
 				android:launchMode="singleTask"
+                android:screenOrientation="landscape"                
                 android:configChanges="orientation|screenSize|keyboardHidden">
 			<meta-data android:name="android.app.lib_name" android:value="vulkanPBRBIBL" />
 			<intent-filter>
diff --git a/android/raytracing/AndroidManifest.xml b/android/raytracing/AndroidManifest.xml
index beb3615a..9af99ae2 100644
--- a/android/raytracing/AndroidManifest.xml
+++ b/android/raytracing/AndroidManifest.xml
@@ -15,6 +15,7 @@
                 android:label="Raytracing"
                 android:theme="@android:style/Theme.NoTitleBar.Fullscreen"
 				android:launchMode="singleTask"
+                android:screenOrientation="landscape"
                 android:configChanges="orientation|screenSize|keyboardHidden">
 			<meta-data android:name="android.app.lib_name" android:value="vulkanRaytracing" />
 			<intent-filter>
diff --git a/android/raytracing/build.bat b/android/raytracing/build.bat
deleted file mode 100644
index 10023b77..00000000
--- a/android/raytracing/build.bat
+++ /dev/null
@@ -1,21 +0,0 @@
-cd jni
-call ndk-build
-if %ERRORLEVEL% EQU 0 (
-	echo ndk-build has failed, build cancelled
-	cd..
-
-	mkdir "assets\shaders\base"
-	xcopy "..\..\data\shaders\base\*.spv" "assets\shaders\base" /Y
-	
-
-	mkdir "assets\shaders\raytracing"
-	xcopy "..\..\data\shaders\raytracing\*.spv" "assets\shaders\raytracing" /Y
-
-	mkdir "res\drawable"
-	xcopy "..\..\android\images\icon.png" "res\drawable" /Y
-
-	call ant debug -Dout.final.file=vulkanRaytracing.apk
-) ELSE (
-	echo error : ndk-build failed with errors!
-	cd..
-)
diff --git a/android/raytracing/build.py b/android/raytracing/build.py
new file mode 100644
index 00000000..d61726cd
--- /dev/null
+++ b/android/raytracing/build.py
@@ -0,0 +1,51 @@
+import os
+import shutil
+import subprocess
+import sys
+import glob
+
+APK_NAME = "vulkanRaytracing"
+SHADER_DIR = "raytracing"
+
+if subprocess.call("ndk-build", shell=True) == 0:   
+    print("Build successful")
+
+    # Copy validation layers
+    if len(sys.argv) > 1:
+        if sys.argv[1] == "-validation":
+            print("copying validation layers")
+            for file in glob.glob("../layers/armeabi-v7a/*.so"):
+                print(file)
+                shutil.copy(file, "./libs/armeabi-v7a")    
+
+    # Assets
+    os.makedirs("./assets/shaders/base", exist_ok=True)
+    os.makedirs("./assets/shaders/%s" % SHADER_DIR, exist_ok=True)
+    os.makedirs("./res/drawable", exist_ok=True)
+
+    # Shaders    
+    # Base
+    if not os.path.exists("./assets/shaders/base"):
+        os.makedirs("./assets/shaders/base")           
+    for file in glob.glob("../../data/shaders/base/*.spv"):
+        shutil.copy(file, "./assets/shaders/base")    
+    # Sample
+    if not os.path.exists("./assets/shaders/%s" % SHADER_DIR):
+        os.makedirs("./assets/shaders/%s" % SHADER_DIR)
+    for file in glob.glob("../../data/shaders/%s/*.spv" %SHADER_DIR):
+        shutil.copy(file, "./assets/shaders/%s" % SHADER_DIR)    
+
+    # Icon
+    if not os.path.exists("./res/drawable"):
+        os.makedirs("./res/drawable")         
+    shutil.copy("../../android/images/icon.png", "./res/drawable")      
+
+    if subprocess.call("ant debug -Dout.final.file=%s.apk" % APK_NAME, shell=True) == 0:
+        if len(sys.argv) > 1:
+            if sys.argv[1] == "-deploy":
+                if subprocess.call("adb install -r %s.apk" % APK_NAME, shell=True) != 0:
+                    print("Could not deploy to device!")
+    else:
+        print("Error during build process!")
+else:
+    print("Error building project!")
diff --git a/android/scenerendering/AndroidManifest.xml b/android/scenerendering/AndroidManifest.xml
index 505e3d6a..5c4c9c14 100644
--- a/android/scenerendering/AndroidManifest.xml
+++ b/android/scenerendering/AndroidManifest.xml
@@ -15,6 +15,7 @@
                 android:label="Scene rendering"
                 android:theme="@android:style/Theme.NoTitleBar.Fullscreen"
 				android:launchMode="singleTask"
+                android:screenOrientation="landscape"                
                 android:configChanges="orientation|screenSize|keyboardHidden">
 			<meta-data android:name="android.app.lib_name" android:value="vulkanScenerendering" />
 			<intent-filter>
diff --git a/android/shadowmapping/AndroidManifest.xml b/android/shadowmapping/AndroidManifest.xml
index b124b11b..2c5fc242 100644
--- a/android/shadowmapping/AndroidManifest.xml
+++ b/android/shadowmapping/AndroidManifest.xml
@@ -15,6 +15,7 @@
                 android:label="Shadow mapping"
                 android:theme="@android:style/Theme.NoTitleBar.Fullscreen"
 				android:launchMode="singleTask"
+                android:screenOrientation="landscape"                                                                                
                 android:configChanges="orientation|screenSize|keyboardHidden">
 			<meta-data android:name="android.app.lib_name" android:value="vulkanShadowmapping" />
 			<intent-filter>
diff --git a/android/ssao/AndroidManifest.xml b/android/ssao/AndroidManifest.xml
index b4b8b704..049ef2e9 100644
--- a/android/ssao/AndroidManifest.xml
+++ b/android/ssao/AndroidManifest.xml
@@ -15,6 +15,7 @@
                 android:label="SSAO"
                 android:theme="@android:style/Theme.NoTitleBar.Fullscreen"
 				android:launchMode="singleTask"
+                android:screenOrientation="landscape"
                 android:configChanges="orientation|screenSize|keyboardHidden">
 			<meta-data android:name="android.app.lib_name" android:value="vulkanSSAO" />
 			<intent-filter>
diff --git a/android/vulkanscene/AndroidManifest.xml b/android/vulkanscene/AndroidManifest.xml
index ef74dfef..ef5a4431 100644
--- a/android/vulkanscene/AndroidManifest.xml
+++ b/android/vulkanscene/AndroidManifest.xml
@@ -15,6 +15,7 @@
                 android:label="Demo Scene"
                 android:theme="@android:style/Theme.NoTitleBar.Fullscreen"
 				android:launchMode="singleTask"
+                android:screenOrientation="landscape"                                                                                
                 android:configChanges="orientation|screenSize|keyboardHidden">
 			<meta-data android:name="android.app.lib_name" android:value="vulkanVulkanscene" />
 			<intent-filter>