diff --git a/android-example/app/.gitignore b/android-example/app/.gitignore
index 796b96d..4e4023c 100644
--- a/android-example/app/.gitignore
+++ b/android-example/app/.gitignore
@@ -1 +1,2 @@
 /build
+/debug
diff --git a/android-example/app/release/app-release.apk b/android-example/app/release/app-release.apk
deleted file mode 100644
index bef4366..0000000
Binary files a/android-example/app/release/app-release.apk and /dev/null differ
diff --git a/android-example/app/src/main/jniLibs/arm64-v8a/libirdecode.so b/android-example/app/src/main/jniLibs/arm64-v8a/libirdecode.so
index 871c43b..2a94be2 100644
Binary files a/android-example/app/src/main/jniLibs/arm64-v8a/libirdecode.so and b/android-example/app/src/main/jniLibs/arm64-v8a/libirdecode.so differ
diff --git a/android-example/app/src/main/jniLibs/armeabi-v7a/libirdecode.so b/android-example/app/src/main/jniLibs/armeabi-v7a/libirdecode.so
index fa13d9a..91fc237 100644
Binary files a/android-example/app/src/main/jniLibs/armeabi-v7a/libirdecode.so and b/android-example/app/src/main/jniLibs/armeabi-v7a/libirdecode.so differ
diff --git a/android-example/app/src/main/jniLibs/x86/libirdecode.so b/android-example/app/src/main/jniLibs/x86/libirdecode.so
index 985fbe3..eb40f5b 100644
Binary files a/android-example/app/src/main/jniLibs/x86/libirdecode.so and b/android-example/app/src/main/jniLibs/x86/libirdecode.so differ
diff --git a/android-example/app/src/main/jniLibs/x86_64/libirdecode.so b/android-example/app/src/main/jniLibs/x86_64/libirdecode.so
index 9eb2e77..0ca5722 100644
Binary files a/android-example/app/src/main/jniLibs/x86_64/libirdecode.so and b/android-example/app/src/main/jniLibs/x86_64/libirdecode.so differ
diff --git a/android-example/build.gradle b/android-example/build.gradle
index 224543e..fe8bde7 100644
--- a/android-example/build.gradle
+++ b/android-example/build.gradle
@@ -6,7 +6,7 @@ buildscript {
         google()
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:3.4.1'
+        classpath 'com.android.tools.build:gradle:3.4.2'
         // NOTE: Do not place your application dependencies here; they belong
         // in the individual module build.gradle files
     }
diff --git a/android-example/decodesdk/build.gradle b/android-example/decodesdk/build.gradle
index e2dac5b..74f5e24 100644
--- a/android-example/decodesdk/build.gradle
+++ b/android-example/decodesdk/build.gradle
@@ -2,7 +2,6 @@ apply plugin: 'com.android.library'
 
 android {
     compileSdkVersion 27
-    buildToolsVersion '27.0.3'
 
     defaultConfig {
         minSdkVersion 19
diff --git a/android-example/decodesdk/src/main/java/net/irext/decode/sdk/IRDecode.java b/android-example/decodesdk/src/main/java/net/irext/decode/sdk/IRDecode.java
index 550a3e0..c09a2db 100644
--- a/android-example/decodesdk/src/main/java/net/irext/decode/sdk/IRDecode.java
+++ b/android-example/decodesdk/src/main/java/net/irext/decode/sdk/IRDecode.java
@@ -18,6 +18,10 @@ public class IRDecode {
 
     private static final String TAG = IRDecode.class.getSimpleName();
 
+    static {
+        System.loadLibrary("irdecode");
+    }
+
     private static Object mSync = new Object();
 
     private native int irOpen(int category, int subCate, String fileName);
@@ -47,12 +51,6 @@ public class IRDecode {
         return mInstance;
     }
 
-    private IRDecode() {
-        String libPath = "/data/irext/libirda_decoder.so";
-        System.out.println("loading decode library " + libPath);
-        System.load(libPath);
-    }
-
     public int openFile(int category, int subCate, String fileName) {
         return irOpen(category, subCate, fileName);
     }
diff --git a/android-example/web-api/build.gradle b/android-example/web-api/build.gradle
index 9caaea3..665cd78 100644
--- a/android-example/web-api/build.gradle
+++ b/android-example/web-api/build.gradle
@@ -4,7 +4,6 @@ android {
     signingConfigs {
     }
     compileSdkVersion 27
-    buildToolsVersion '27.0.3'
     defaultConfig {
         minSdkVersion 19
         targetSdkVersion 27