diff --git a/project/android/AndroidManifest.xml b/project/android/AndroidManifest.xml
index 0dfca86..7b97a02 100755
--- a/project/android/AndroidManifest.xml
+++ b/project/android/AndroidManifest.xml
@@ -6,8 +6,8 @@
       android:installLocation="preferExternal">
 
     <!-- This is the platform API where NativeActivity was introduced. -->
-    <uses-sdk   android:minSdkVersion="24"
-                android:targetSdkVersion="24" />
+    <uses-sdk   android:minSdkVersion="19"
+                android:targetSdkVersion="36" />
                 
     <!-- uses-feature android:name="android.hardware.touchscreen.multitouch" android:required="true"/ -->
 
diff --git a/project/android/jni/Application.mk b/project/android/jni/Application.mk
index 2ea6b29..b3d73ad 100755
--- a/project/android/jni/Application.mk
+++ b/project/android/jni/Application.mk
@@ -1,4 +1,4 @@
-APP_PLATFORM := android-21
+APP_PLATFORM := android-19
 APP_STL := gnustl_static
 APP_OPTIM        := release
 APP_ABI          := arm64-v8a
diff --git a/project/android_java/AndroidManifest.xml b/project/android_java/AndroidManifest.xml
index 7127054..3859e3c 100755
--- a/project/android_java/AndroidManifest.xml
+++ b/project/android_java/AndroidManifest.xml
@@ -5,8 +5,8 @@
       android:versionName="0.6.1-alpha-0.0.3">
 
     <uses-sdk
-        android:minSdkVersion="24"
-        android:targetSdkVersion="28"/>
+        android:minSdkVersion="19"
+        android:targetSdkVersion="36"/>
 
     <uses-feature
         android:name="android.hardware.touchscreen.multitouch"
diff --git a/project/android_java/jni/Application.mk b/project/android_java/jni/Application.mk
index 6c92946..a64d8b9 100755
--- a/project/android_java/jni/Application.mk
+++ b/project/android_java/jni/Application.mk
@@ -1,4 +1,4 @@
-APP_PLATFORM := android-9
+APP_PLATFORM := android-19
 APP_STL := gnustl_static
 APP_OPTIM        := release
 APP_ABI          := armeabi-v7a
\ No newline at end of file
diff --git a/src/AppPlatform_android.h b/src/AppPlatform_android.h
index 6ae271c..9f3a7cf 100755
--- a/src/AppPlatform_android.h
+++ b/src/AppPlatform_android.h
@@ -202,6 +202,8 @@ public:
         LOGI("initConsts: screenWidth=%d, calling getScreenHeight\n", _screenWidth);
         _screenHeight = env->CallIntMethod(instance, fHeight);
         LOGI("initConsts: screenHeight=%d, done\n", _screenHeight);
+
+        return 1;
     }
 
     void tick() {
@@ -536,7 +538,7 @@ public:
 
     static __inline bool isSquare(int n) {
         int L = n & 0xf;
-        if ((1 << L) & 0x213 == 0) return false;
+        if (((1 << L) & 0x213) == 0) return false;
 
         int t = (int) sqrt((double) n) + 0.5;
         return t*t == n;
diff --git a/src/client/OptionsFile.cpp b/src/client/OptionsFile.cpp
index a227471..3bd9a4a 100755
--- a/src/client/OptionsFile.cpp
+++ b/src/client/OptionsFile.cpp
@@ -1,6 +1,7 @@
 #include "OptionsFile.h"
 #include <stdio.h>
 #include <string.h>
+#include <errno.h>
 #include <platform/log.h>
 
 OptionsFile::OptionsFile() {
diff --git a/src/client/player/LocalPlayer.cpp b/src/client/player/LocalPlayer.cpp
index 5c7f65e..a325a37 100755
--- a/src/client/player/LocalPlayer.cpp
+++ b/src/client/player/LocalPlayer.cpp
@@ -30,6 +30,7 @@
 #else
 #include <sys/stat.h>
 #include <sys/types.h>
+#include <errno.h>
 #endif
 
 #ifndef STANDALONE_SERVER
diff --git a/src/main_android_java.cpp b/src/main_android_java.cpp
index 28ed165..e6d91df 100755
--- a/src/main_android_java.cpp
+++ b/src/main_android_java.cpp
@@ -7,8 +7,7 @@
 //#include "main_android_java.h"
 #include "platform/input/Multitouch.h"
 #include <unistd.h>
-#include <sys/syscall.h>
-#define gettid() ((int)syscall(SYS_gettid))
+#include <pthread.h>
 
 // Horrible, I know. / A
 #ifndef MAIN_CLASS
@@ -145,7 +144,7 @@ Java_com_mojang_minecraftpe_GLRenderer_nativeOnSurfaceCreated(JNIEnv* env) {
 
 JNIEXPORT void JNICALL
 Java_com_mojang_minecraftpe_GLRenderer_nativeOnSurfaceChanged(JNIEnv* env, jclass cls, jint w, jint h) {
-    LOGI("@nativeOnSurfaceChanged: %p\n", pthread_self());
+    LOGI("@nativeOnSurfaceChanged: %lu\n", (unsigned long)pthread_self());
 
     if (gApp) {
         gApp->setSize(w, h);