diff --git a/app/build.gradle b/app/build.gradle
index d92f7ed..68d39f1 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -1,15 +1,15 @@
 apply plugin: 'com.android.application'
 
 android {
-    compileSdkVersion 26
+    compileSdkVersion 27
+    buildToolsVersion '27.0.3'
 
     defaultConfig {
         applicationId "com.zxy.tiny.test"
         minSdkVersion 14
-        targetSdkVersion 26
+        targetSdkVersion 27
         versionCode 1
         versionName "1.0"
-        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
 
         ndk {
             abiFilters 'armeabi-v7a','x86'
@@ -26,12 +26,8 @@ android {
 
 dependencies {
     implementation fileTree(include: ['*.jar'], dir: 'libs')
-    androidTestCompile('com.android.support.test.espresso:espresso-core:2.2.2', {
-        exclude group: 'com.android.support', module: 'support-annotations'
-    })
-    implementation 'com.android.support:appcompat-v7:24.0.0'
-    testCompile 'junit:junit:4.12'
+    implementation 'com.android.support:appcompat-v7:27.1.1'
+    implementation 'com.android.support:support-v4:27.1.1'
     implementation project(':tiny')
-    implementation 'com.zxy.android:recovery:0.1.4'
-    implementation 'com.android.support:design:24.0.0'
+    implementation 'com.zxy.android:recovery:1.0.0'
 }
diff --git a/app/src/androidTest/java/com/zxy/tiny/test/ExampleInstrumentedTest.java b/app/src/androidTest/java/com/zxy/tiny/test/ExampleInstrumentedTest.java
deleted file mode 100644
index 8ff1122..0000000
--- a/app/src/androidTest/java/com/zxy/tiny/test/ExampleInstrumentedTest.java
+++ /dev/null
@@ -1,26 +0,0 @@
-package com.zxy.tiny.test;
-
-import android.content.Context;
-import android.support.test.InstrumentationRegistry;
-import android.support.test.runner.AndroidJUnit4;
-
-import org.junit.Test;
-import org.junit.runner.RunWith;
-
-import static org.junit.Assert.*;
-
-/**
- * Instrumentation test, which will execute on an Android device.
- *
- * @see <a href="http://d.android.com/tools/testing">Testing documentation</a>
- */
-@RunWith(AndroidJUnit4.class)
-public class ExampleInstrumentedTest {
-    @Test
-    public void useAppContext() throws Exception {
-        // Context of the app under test.
-        Context appContext = InstrumentationRegistry.getTargetContext();
-
-        assertEquals("com.zxy.tiny.test", appContext.getPackageName());
-    }
-}
diff --git a/app/src/main/java/com/zxy/tiny/test/BatchFileCompressTestActivity.java b/app/src/main/java/com/zxy/tiny/test/BatchFileCompressTestActivity.java
index 6e27f73..60b5097 100644
--- a/app/src/main/java/com/zxy/tiny/test/BatchFileCompressTestActivity.java
+++ b/app/src/main/java/com/zxy/tiny/test/BatchFileCompressTestActivity.java
@@ -208,7 +208,7 @@ private void testFile() {
 
             Tiny.FileCompressOptions compressOptions = new Tiny.FileCompressOptions();
             compressOptions.config = mConfig;
-
+//            compressOptions.compressDirectory = Tiny.getInstance().getApplication().getFilesDir().getAbsolutePath();
             File[] files = new File[]{outfile1, outfile2, outfile3, outfile4};
             Tiny.getInstance().source(files).batchAsFile().withOptions(compressOptions).batchCompress(new FileBatchCallback() {
                 @Override
diff --git a/app/src/main/java/com/zxy/tiny/test/FileCompressTestActivity.java b/app/src/main/java/com/zxy/tiny/test/FileCompressTestActivity.java
index b2e8a5d..291d75d 100644
--- a/app/src/main/java/com/zxy/tiny/test/FileCompressTestActivity.java
+++ b/app/src/main/java/com/zxy/tiny/test/FileCompressTestActivity.java
@@ -171,6 +171,7 @@ private void testFile() {
 
             Tiny.FileCompressOptions compressOptions = new Tiny.FileCompressOptions();
             compressOptions.config = mConfig;
+//            compressOptions.compressDirectory = Tiny.getInstance().getApplication().getFilesDir().getAbsolutePath();
             Tiny.getInstance().source(outfile).asFile().withOptions(compressOptions).compress(new FileCallback() {
                 @Override
                 public void callback(boolean isSuccess, String outfile, Throwable t) {
diff --git a/app/src/test/java/com/zxy/tiny/test/ExampleUnitTest.java b/app/src/test/java/com/zxy/tiny/test/ExampleUnitTest.java
deleted file mode 100644
index 78ac49b..0000000
--- a/app/src/test/java/com/zxy/tiny/test/ExampleUnitTest.java
+++ /dev/null
@@ -1,17 +0,0 @@
-package com.zxy.tiny.test;
-
-import org.junit.Test;
-
-import static org.junit.Assert.*;
-
-/**
- * Example local unit test, which will execute on the development machine (host).
- *
- * @see <a href="http://d.android.com/tools/testing">Testing documentation</a>
- */
-public class ExampleUnitTest {
-    @Test
-    public void addition_isCorrect() throws Exception {
-        assertEquals(4, 2 + 2);
-    }
-}
\ No newline at end of file
diff --git a/build.gradle b/build.gradle
index c8a5712..248154b 100644
--- a/build.gradle
+++ b/build.gradle
@@ -2,11 +2,12 @@
 
 buildscript {
     repositories {
-        jcenter()
         google()
+        jcenter()
+        mavenCentral()
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:3.1.3'
+        classpath 'com.android.tools.build:gradle:3.1.2'
         classpath 'com.novoda:bintray-release:0.8.1'
         // NOTE: Do not place your application dependencies here; they belong
         // in the individual module build.gradle files
@@ -15,8 +16,9 @@ buildscript {
 
 allprojects {
     repositories {
-        jcenter()
         google()
+        jcenter()
+        mavenCentral()
     }
 }
 
diff --git a/gradle.properties b/gradle.properties
index 6c88497..c3b312e 100644
--- a/gradle.properties
+++ b/gradle.properties
@@ -16,4 +16,6 @@ org.gradle.jvmargs=-Xmx1536m
 # http://www.gradle.org/docs/current/userguide/multi_project_builds.html#sec:decoupled_projects
 # org.gradle.parallel=true
 
-TINY_VERSION=0.0.1
+android.enableD8=true
+android.enableIncrementalDesugaring=false
+android.enableAapt2=true
\ No newline at end of file
diff --git a/gradle/wrapper/gradle-wrapper.jar b/gradle/wrapper/gradle-wrapper.jar
index 13372ae..01b8bf6 100644
Binary files a/gradle/wrapper/gradle-wrapper.jar and b/gradle/wrapper/gradle-wrapper.jar differ
diff --git a/gradle/wrapper/gradle-wrapper.properties b/gradle/wrapper/gradle-wrapper.properties
index 24e7c39..4be1582 100644
--- a/gradle/wrapper/gradle-wrapper.properties
+++ b/gradle/wrapper/gradle-wrapper.properties
@@ -1,4 +1,4 @@
-#Mon Dec 28 10:00:20 PST 2015
+#Fri Oct 26 14:42:54 CST 2018
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME
diff --git a/gradlew b/gradlew
index 9d82f78..cccdd3d 100755
--- a/gradlew
+++ b/gradlew
@@ -1,4 +1,4 @@
-#!/usr/bin/env bash
+#!/usr/bin/env sh
 
 ##############################################################################
 ##
@@ -6,20 +6,38 @@
 ##
 ##############################################################################
 
-# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
-DEFAULT_JVM_OPTS=""
+# Attempt to set APP_HOME
+# Resolve links: $0 may be a link
+PRG="$0"
+# Need this for relative symlinks.
+while [ -h "$PRG" ] ; do
+    ls=`ls -ld "$PRG"`
+    link=`expr "$ls" : '.*-> \(.*\)$'`
+    if expr "$link" : '/.*' > /dev/null; then
+        PRG="$link"
+    else
+        PRG=`dirname "$PRG"`"/$link"
+    fi
+done
+SAVED="`pwd`"
+cd "`dirname \"$PRG\"`/" >/dev/null
+APP_HOME="`pwd -P`"
+cd "$SAVED" >/dev/null
 
 APP_NAME="Gradle"
 APP_BASE_NAME=`basename "$0"`
 
+# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+DEFAULT_JVM_OPTS=""
+
 # Use the maximum available, or set MAX_FD != -1 to use that value.
 MAX_FD="maximum"
 
-warn ( ) {
+warn () {
     echo "$*"
 }
 
-die ( ) {
+die () {
     echo
     echo "$*"
     echo
@@ -30,6 +48,7 @@ die ( ) {
 cygwin=false
 msys=false
 darwin=false
+nonstop=false
 case "`uname`" in
   CYGWIN* )
     cygwin=true
@@ -40,26 +59,11 @@ case "`uname`" in
   MINGW* )
     msys=true
     ;;
+  NONSTOP* )
+    nonstop=true
+    ;;
 esac
 
-# Attempt to set APP_HOME
-# Resolve links: $0 may be a link
-PRG="$0"
-# Need this for relative symlinks.
-while [ -h "$PRG" ] ; do
-    ls=`ls -ld "$PRG"`
-    link=`expr "$ls" : '.*-> \(.*\)$'`
-    if expr "$link" : '/.*' > /dev/null; then
-        PRG="$link"
-    else
-        PRG=`dirname "$PRG"`"/$link"
-    fi
-done
-SAVED="`pwd`"
-cd "`dirname \"$PRG\"`/" >/dev/null
-APP_HOME="`pwd -P`"
-cd "$SAVED" >/dev/null
-
 CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar
 
 # Determine the Java command to use to start the JVM.
@@ -85,7 +89,7 @@ location of your Java installation."
 fi
 
 # Increase the maximum file descriptors if we can.
-if [ "$cygwin" = "false" -a "$darwin" = "false" ] ; then
+if [ "$cygwin" = "false" -a "$darwin" = "false" -a "$nonstop" = "false" ] ; then
     MAX_FD_LIMIT=`ulimit -H -n`
     if [ $? -eq 0 ] ; then
         if [ "$MAX_FD" = "maximum" -o "$MAX_FD" = "max" ] ; then
@@ -150,11 +154,19 @@ if $cygwin ; then
     esac
 fi
 
-# Split up the JVM_OPTS And GRADLE_OPTS values into an array, following the shell quoting and substitution rules
-function splitJvmOpts() {
-    JVM_OPTS=("$@")
+# Escape application args
+save () {
+    for i do printf %s\\n "$i" | sed "s/'/'\\\\''/g;1s/^/'/;\$s/\$/' \\\\/" ; done
+    echo " "
 }
-eval splitJvmOpts $DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS
-JVM_OPTS[${#JVM_OPTS[*]}]="-Dorg.gradle.appname=$APP_BASE_NAME"
+APP_ARGS=$(save "$@")
+
+# Collect all arguments for the java command, following the shell quoting and substitution rules
+eval set -- $DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS "\"-Dorg.gradle.appname=$APP_BASE_NAME\"" -classpath "\"$CLASSPATH\"" org.gradle.wrapper.GradleWrapperMain "$APP_ARGS"
+
+# by default we should be in the correct project dir, but when run from Finder on Mac, the cwd is wrong
+if [ "$(uname)" = "Darwin" ] && [ "$HOME" = "$PWD" ]; then
+  cd "$(dirname "$0")"
+fi
 
-exec "$JAVACMD" "${JVM_OPTS[@]}" -classpath "$CLASSPATH" org.gradle.wrapper.GradleWrapperMain "$@"
+exec "$JAVACMD" "$@"
diff --git a/gradlew.bat b/gradlew.bat
index aec9973..e95643d 100644
--- a/gradlew.bat
+++ b/gradlew.bat
@@ -8,14 +8,14 @@
 @rem Set local scope for the variables with windows NT shell
 if "%OS%"=="Windows_NT" setlocal
 
-@rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
-set DEFAULT_JVM_OPTS=
-
 set DIRNAME=%~dp0
 if "%DIRNAME%" == "" set DIRNAME=.
 set APP_BASE_NAME=%~n0
 set APP_HOME=%DIRNAME%
 
+@rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+set DEFAULT_JVM_OPTS=
+
 @rem Find java.exe
 if defined JAVA_HOME goto findJavaFromJavaHome
 
@@ -46,10 +46,9 @@ echo location of your Java installation.
 goto fail
 
 :init
-@rem Get command-line arguments, handling Windowz variants
+@rem Get command-line arguments, handling Windows variants
 
 if not "%OS%" == "Windows_NT" goto win9xME_args
-if "%@eval[2+2]" == "4" goto 4NT_args
 
 :win9xME_args
 @rem Slurp the command line arguments.
@@ -60,11 +59,6 @@ set _SKIP=2
 if "x%~1" == "x" goto execute
 
 set CMD_LINE_ARGS=%*
-goto execute
-
-:4NT_args
-@rem Get arguments from the 4NT Shell from JP Software
-set CMD_LINE_ARGS=%$
 
 :execute
 @rem Setup the command line
diff --git a/settings.gradle b/settings.gradle
index 7217e4c..9e411b9 100644
--- a/settings.gradle
+++ b/settings.gradle
@@ -1 +1,3 @@
-include ':app', ':tiny', ':libjpeg-turbo', ':libjpeg-turbo-sdk'
+include ':app', ':tiny'
+
+//':libjpeg-turbo', ':libjpeg-turbo-sdk'