diff --git a/app/build.gradle b/app/build.gradle
index a871d8c..2ce7047 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -3,7 +3,7 @@ apply plugin: 'kotlin-android'
 
 android {
     compileSdkVersion 25
-    buildToolsVersion "25.0.1"
+    buildToolsVersion '27.0.3'
     defaultConfig {
         applicationId "com.zyyoona7.kextensions"
         minSdkVersion 16
@@ -20,9 +20,9 @@ android {
 }
 
 dependencies {
-    compile fileTree(dir: 'libs', include: ['*.jar'])
-    compile 'com.android.support:appcompat-v7:25.+'
-    compile 'com.android.support.constraint:constraint-layout:1.0.2'
-    compile "org.jetbrains.kotlin:kotlin-stdlib-jre7:$kotlin_version"
-    compile project(":lib")
+    implementation fileTree(dir: 'libs', include: ['*.jar'])
+    implementation 'com.android.support:appcompat-v7:25.+'
+    implementation 'com.android.support.constraint:constraint-layout:1.0.2'
+    implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"
+    implementation project(":lib")
 }
diff --git a/app/src/main/java/com/zyyoona7/kextensions/MainActivity.kt b/app/src/main/java/com/zyyoona7/kextensions/MainActivity.kt
index 57fd8a6..fe9f85b 100644
--- a/app/src/main/java/com/zyyoona7/kextensions/MainActivity.kt
+++ b/app/src/main/java/com/zyyoona7/kextensions/MainActivity.kt
@@ -7,7 +7,7 @@ import android.os.Environment.getExternalStorageDirectory
 import android.provider.MediaStore
 import android.support.v7.app.AppCompatActivity
 import android.widget.Button
-import com.zyyoona7.lib.*
+import com.zyyoona7.extensions.*
 import java.io.File
 import java.text.SimpleDateFormat
 import java.util.*
@@ -16,7 +16,7 @@ import java.util.*
 class MainActivity : AppCompatActivity() {
     val tag = "MainActivity"
 
-    lateinit var btnHello:Button
+    lateinit var btnHello: Button
 
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
@@ -52,25 +52,28 @@ class MainActivity : AppCompatActivity() {
 //        loge("path=$download \nFile=${getFileName(download)}")
 //
 
-//        if (ContextCompat.checkSelfPermission(this, android.Manifest.permission.WRITE_EXTERNAL_STORAGE)
-//                != PackageManager.PERMISSION_GRANTED) {
-
-//        } else {
-//            writeFile()
-//        }
+        if (!isPermissionGranted(android.Manifest.permission.WRITE_EXTERNAL_STORAGE)) {
+            requestPermission(arrayOf(android.Manifest.permission.WRITE_EXTERNAL_STORAGE), 11223)
+        } else {
+            writeFile()
+        }
 
-        val cal = Calendar.getInstance()
+//        val cal = Calendar.getInstance()
 //        cal.add(Calendar.HOUR_OF_DAY, -25)
 //        loge(cal.timeInMillis.formatAgoStyleForWeChat())
 //        loge(cal.timeInMillis.formatAgoStyleForWeibo())
-        cal.add(Calendar.DATE, 2)
-        loge("day number of week = ${cal.timeInMillis.dayOfWeek}")
-
-        btnHello=findViewById(R.id.btn_hello) as Button
-        btnHello.setOnClickListener{
-            requestPermission(arrayOf(Manifest.permission.CAMERA)
-                    , 11223)
-        }
+//        cal.add(Calendar.DATE, 2)
+//        loge("day number of week = ${cal.timeInMillis.dayOfWeek}")
+//
+//        btnHello=findViewById(R.id.btn_hello) as Button
+//        btnHello.setOnClickListener{
+//            requestPermission(arrayOf(Manifest.permission.CAMERA)
+//                    , 11223)
+//        }
+        val download = publicDownloadDir + "/a.txt"
+        val encodeStr = "123".base64Encode()
+        val data = "123"
+        val key = "45678910"
     }
 
     private fun writeFile() {
@@ -90,7 +93,7 @@ class MainActivity : AppCompatActivity() {
         loge(readFileAsString(download))
         val destFilePath = publicPictureDir + "/b.txt"
         createOrExistsFile(destFilePath)
-        loge("copy finished ${copyOrMoveFile(download, destFilePath, true)}")
+        loge("copy finished ${copyOrMoveFile(download, destFilePath, false)}")
 //        installApp()
     }
 
@@ -98,10 +101,10 @@ class MainActivity : AppCompatActivity() {
         super.onRequestPermissionsResult(requestCode, permissions, grantResults)
         if (requestCode == 11223) {
 //            writeFile()
-            handlePermissionResult(permissions, grantResults,{
+            handlePermissionResult(permissions, grantResults, {
                 loge("permissions granted ${isPermissionGranted(Manifest.permission.CAMERA)}")
                 takePhotoNoCompress()
-            },{
+            }, {
                 loge("permissions denied ${arePermissionAlwaysDenied(*permissions)}")
             })
         }
@@ -116,7 +119,7 @@ class MainActivity : AppCompatActivity() {
             val file = File(getExternalStorageDirectory(), filename)
 //            mCurrentPhotoPath = file.absolutePath
 
-            val fileUri = getUriFromFile( file)
+            val fileUri = getUriFromFile(file)
 
             takePictureIntent.putExtra(MediaStore.EXTRA_OUTPUT, fileUri)
             startActivityForResult(takePictureIntent, 12345)
diff --git a/build.gradle b/build.gradle
index 6ac6ee1..9433d2a 100644
--- a/build.gradle
+++ b/build.gradle
@@ -1,14 +1,15 @@
 // Top-level build file where you can add configuration options common to all sub-projects/modules.
 
 buildscript {
-    ext.kotlin_version = '1.1.4-3'
+    ext.kotlin_version = '1.2.30'
     repositories {
         jcenter()
+        google()
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:2.3.3'
+        classpath 'com.android.tools.build:gradle:3.1.2'
         classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
-        classpath 'com.github.dcendents:android-maven-gradle-plugin:1.5'
+        classpath 'com.github.dcendents:android-maven-gradle-plugin:2.0'
         // NOTE: Do not place your application dependencies here; they belong
         // in the individual module build.gradle files
     }
diff --git a/gradle/wrapper/gradle-wrapper.properties b/gradle/wrapper/gradle-wrapper.properties
index ff5f1ce..4a56c28 100644
--- a/gradle/wrapper/gradle-wrapper.properties
+++ b/gradle/wrapper/gradle-wrapper.properties
@@ -1,6 +1,6 @@
-#Thu Aug 24 14:15:50 CST 2017
+#Fri Jun 01 18:20:27 CST 2018
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-3.3-all.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-4.4-all.zip
diff --git a/lib/build.gradle b/lib/build.gradle
index 2dfda47..08a9a4f 100644
--- a/lib/build.gradle
+++ b/lib/build.gradle
@@ -5,7 +5,7 @@ group='com.github.zyyoona7'
 
 android {
     compileSdkVersion 25
-    buildToolsVersion "25.0.1"
+    buildToolsVersion '27.0.3'
 
     defaultConfig {
         minSdkVersion 16
@@ -25,8 +25,8 @@ android {
 }
 
 dependencies {
-    provided fileTree(dir: 'libs', include: ['*.jar'])
-    provided 'com.android.support:appcompat-v7:25.+'
-    provided 'com.android.support:design:25.+'
-    provided "org.jetbrains.kotlin:kotlin-stdlib-jre7:$kotlin_version"
+    compileOnly fileTree(dir: 'libs', include: ['*.jar'])
+    compileOnly 'com.android.support:appcompat-v7:25.+'
+    compileOnly 'com.android.support:design:25.+'
+    compileOnly "org.jetbrains.kotlin:kotlin-stdlib-jre7:$kotlin_version"
 }
diff --git a/lib/src/androidTest/java/com/zyyoona7/lib/ExampleInstrumentedTest.java b/lib/src/androidTest/java/com/zyyoona7/extensions/ExampleInstrumentedTest.java
similarity index 95%
rename from lib/src/androidTest/java/com/zyyoona7/lib/ExampleInstrumentedTest.java
rename to lib/src/androidTest/java/com/zyyoona7/extensions/ExampleInstrumentedTest.java
index ecd3936..fdd9e2d 100644
--- a/lib/src/androidTest/java/com/zyyoona7/lib/ExampleInstrumentedTest.java
+++ b/lib/src/androidTest/java/com/zyyoona7/extensions/ExampleInstrumentedTest.java
@@ -1,4 +1,4 @@
-package com.zyyoona7.lib;
+package com.zyyoona7.extensions;
 
 import android.content.Context;
 import android.support.test.InstrumentationRegistry;
diff --git a/lib/src/main/AndroidManifest.xml b/lib/src/main/AndroidManifest.xml
index 3b936ce..b6608fc 100644
--- a/lib/src/main/AndroidManifest.xml
+++ b/lib/src/main/AndroidManifest.xml
@@ -1,13 +1,4 @@
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
-
-          package="com.zyyoona7.lib"
->
-
-    <application android:allowBackup="true"
-                 android:label="@string/app_name"
-                 android:supportsRtl="true"
-    >
-
-    </application>
+          package="com.zyyoona7.extensions">
 
 </manifest>
diff --git a/lib/src/main/java/com/zyyoona7/lib/appInfos.kt b/lib/src/main/java/com/zyyoona7/extensions/appInfos.kt
similarity index 99%
rename from lib/src/main/java/com/zyyoona7/lib/appInfos.kt
rename to lib/src/main/java/com/zyyoona7/extensions/appInfos.kt
index 6d877a2..c08198a 100644
--- a/lib/src/main/java/com/zyyoona7/lib/appInfos.kt
+++ b/lib/src/main/java/com/zyyoona7/extensions/appInfos.kt
@@ -1,4 +1,4 @@
-package com.zyyoona7.lib
+package com.zyyoona7.extensions
 
 import android.app.ActivityManager
 import android.app.Fragment
diff --git a/lib/src/main/java/com/zyyoona7/lib/dates.kt b/lib/src/main/java/com/zyyoona7/extensions/dates.kt
similarity index 99%
rename from lib/src/main/java/com/zyyoona7/lib/dates.kt
rename to lib/src/main/java/com/zyyoona7/extensions/dates.kt
index 1eca0e0..913d34d 100644
--- a/lib/src/main/java/com/zyyoona7/lib/dates.kt
+++ b/lib/src/main/java/com/zyyoona7/extensions/dates.kt
@@ -1,4 +1,4 @@
-package com.zyyoona7.lib
+package com.zyyoona7.extensions
 
 import android.annotation.SuppressLint
 import java.text.DateFormat
diff --git a/lib/src/main/java/com/zyyoona7/lib/deriator/InsecureSHA1PRNGKeyDerivator.java b/lib/src/main/java/com/zyyoona7/extensions/deriator/InsecureSHA1PRNGKeyDerivator.java
similarity index 99%
rename from lib/src/main/java/com/zyyoona7/lib/deriator/InsecureSHA1PRNGKeyDerivator.java
rename to lib/src/main/java/com/zyyoona7/extensions/deriator/InsecureSHA1PRNGKeyDerivator.java
index 1c5f64f..68288d0 100644
--- a/lib/src/main/java/com/zyyoona7/lib/deriator/InsecureSHA1PRNGKeyDerivator.java
+++ b/lib/src/main/java/com/zyyoona7/extensions/deriator/InsecureSHA1PRNGKeyDerivator.java
@@ -1,4 +1,4 @@
-package com.zyyoona7.lib.deriator;
+package com.zyyoona7.extensions.deriator;
 
 /**
  * Stripped-down version of the SHA1PRNG provided by the Crypto provider.
diff --git a/lib/src/main/java/com/zyyoona7/lib/dimensions.kt b/lib/src/main/java/com/zyyoona7/extensions/dimensions.kt
similarity index 99%
rename from lib/src/main/java/com/zyyoona7/lib/dimensions.kt
rename to lib/src/main/java/com/zyyoona7/extensions/dimensions.kt
index e35c379..e5e26b9 100644
--- a/lib/src/main/java/com/zyyoona7/lib/dimensions.kt
+++ b/lib/src/main/java/com/zyyoona7/extensions/dimensions.kt
@@ -1,4 +1,4 @@
-package com.zyyoona7.lib
+package com.zyyoona7.extensions
 
 import android.app.Fragment
 import android.content.Context
diff --git a/lib/src/main/java/com/zyyoona7/lib/encodes.kt b/lib/src/main/java/com/zyyoona7/extensions/encodes.kt
similarity index 98%
rename from lib/src/main/java/com/zyyoona7/lib/encodes.kt
rename to lib/src/main/java/com/zyyoona7/extensions/encodes.kt
index 791b861..1802072 100644
--- a/lib/src/main/java/com/zyyoona7/lib/encodes.kt
+++ b/lib/src/main/java/com/zyyoona7/extensions/encodes.kt
@@ -1,4 +1,4 @@
-package com.zyyoona7.lib
+package com.zyyoona7.extensions
 
 import android.util.Base64
 import java.io.File
diff --git a/lib/src/main/java/com/zyyoona7/lib/encrypts.kt b/lib/src/main/java/com/zyyoona7/extensions/encrypts.kt
similarity index 99%
rename from lib/src/main/java/com/zyyoona7/lib/encrypts.kt
rename to lib/src/main/java/com/zyyoona7/extensions/encrypts.kt
index 734117c..b6e3db4 100644
--- a/lib/src/main/java/com/zyyoona7/lib/encrypts.kt
+++ b/lib/src/main/java/com/zyyoona7/extensions/encrypts.kt
@@ -1,6 +1,6 @@
-package com.zyyoona7.lib
+package com.zyyoona7.extensions
 
-import com.zyyoona7.lib.deriator.InsecureSHA1PRNGKeyDerivator
+import com.zyyoona7.extensions.deriator.InsecureSHA1PRNGKeyDerivator
 import java.io.ByteArrayOutputStream
 import java.io.File
 import java.io.FileInputStream
diff --git a/lib/src/main/java/com/zyyoona7/lib/fileProviders.kt b/lib/src/main/java/com/zyyoona7/extensions/fileProviders.kt
similarity index 98%
rename from lib/src/main/java/com/zyyoona7/lib/fileProviders.kt
rename to lib/src/main/java/com/zyyoona7/extensions/fileProviders.kt
index c696713..2fa7fcb 100644
--- a/lib/src/main/java/com/zyyoona7/lib/fileProviders.kt
+++ b/lib/src/main/java/com/zyyoona7/extensions/fileProviders.kt
@@ -1,4 +1,4 @@
-package com.zyyoona7.lib
+package com.zyyoona7.extensions
 
 import android.app.Fragment
 import android.content.Context
diff --git a/lib/src/main/java/com/zyyoona7/lib/files.kt b/lib/src/main/java/com/zyyoona7/extensions/files.kt
similarity index 99%
rename from lib/src/main/java/com/zyyoona7/lib/files.kt
rename to lib/src/main/java/com/zyyoona7/extensions/files.kt
index 885a089..4f610df 100644
--- a/lib/src/main/java/com/zyyoona7/lib/files.kt
+++ b/lib/src/main/java/com/zyyoona7/extensions/files.kt
@@ -1,4 +1,4 @@
-package com.zyyoona7.lib
+package com.zyyoona7.extensions
 
 import android.app.Fragment
 import android.content.Context
diff --git a/lib/src/main/java/com/zyyoona7/lib/intents.kt b/lib/src/main/java/com/zyyoona7/extensions/intents.kt
similarity index 99%
rename from lib/src/main/java/com/zyyoona7/lib/intents.kt
rename to lib/src/main/java/com/zyyoona7/extensions/intents.kt
index da8fca4..dceca41 100644
--- a/lib/src/main/java/com/zyyoona7/lib/intents.kt
+++ b/lib/src/main/java/com/zyyoona7/extensions/intents.kt
@@ -1,4 +1,4 @@
-package com.zyyoona7.lib
+package com.zyyoona7.extensions
 
 import android.app.Activity
 import android.app.Fragment
diff --git a/lib/src/main/java/com/zyyoona7/lib/keyboard.kt b/lib/src/main/java/com/zyyoona7/extensions/keyboard.kt
similarity index 98%
rename from lib/src/main/java/com/zyyoona7/lib/keyboard.kt
rename to lib/src/main/java/com/zyyoona7/extensions/keyboard.kt
index 578594e..62f8970 100644
--- a/lib/src/main/java/com/zyyoona7/lib/keyboard.kt
+++ b/lib/src/main/java/com/zyyoona7/extensions/keyboard.kt
@@ -1,4 +1,4 @@
-package com.zyyoona7.lib
+package com.zyyoona7.extensions
 
 import android.app.Activity
 import android.app.Fragment
diff --git a/lib/src/main/java/com/zyyoona7/lib/log/ZLog.kt b/lib/src/main/java/com/zyyoona7/extensions/log/ZLog.kt
similarity index 99%
rename from lib/src/main/java/com/zyyoona7/lib/log/ZLog.kt
rename to lib/src/main/java/com/zyyoona7/extensions/log/ZLog.kt
index 63da756..a8aed6e 100644
--- a/lib/src/main/java/com/zyyoona7/lib/log/ZLog.kt
+++ b/lib/src/main/java/com/zyyoona7/extensions/log/ZLog.kt
@@ -1,4 +1,4 @@
-package com.zyyoona7.lib.log
+package com.zyyoona7.extensions.log
 
 import android.util.Log
 import org.json.JSONArray
diff --git a/lib/src/main/java/com/zyyoona7/lib/logs.kt b/lib/src/main/java/com/zyyoona7/extensions/logs.kt
similarity index 90%
rename from lib/src/main/java/com/zyyoona7/lib/logs.kt
rename to lib/src/main/java/com/zyyoona7/extensions/logs.kt
index 2722cfd..f28248d 100644
--- a/lib/src/main/java/com/zyyoona7/lib/logs.kt
+++ b/lib/src/main/java/com/zyyoona7/extensions/logs.kt
@@ -1,6 +1,6 @@
-package com.zyyoona7.lib
+package com.zyyoona7.extensions
 
-import com.zyyoona7.lib.log.ZLog
+import com.zyyoona7.extensions.log.ZLog
 
 /**
  * Created by zyyoona7 on 2017/8/24.
diff --git a/lib/src/main/java/com/zyyoona7/lib/network.kt b/lib/src/main/java/com/zyyoona7/extensions/network.kt
similarity index 99%
rename from lib/src/main/java/com/zyyoona7/lib/network.kt
rename to lib/src/main/java/com/zyyoona7/extensions/network.kt
index 400c7be..8c59d1a 100644
--- a/lib/src/main/java/com/zyyoona7/lib/network.kt
+++ b/lib/src/main/java/com/zyyoona7/extensions/network.kt
@@ -1,4 +1,4 @@
-package com.zyyoona7.lib
+package com.zyyoona7.extensions
 
 import android.app.Fragment
 import android.content.Context
diff --git a/lib/src/main/java/com/zyyoona7/lib/permissions.kt b/lib/src/main/java/com/zyyoona7/extensions/permissions.kt
similarity index 99%
rename from lib/src/main/java/com/zyyoona7/lib/permissions.kt
rename to lib/src/main/java/com/zyyoona7/extensions/permissions.kt
index fcfc8a9..a935c7d 100644
--- a/lib/src/main/java/com/zyyoona7/lib/permissions.kt
+++ b/lib/src/main/java/com/zyyoona7/extensions/permissions.kt
@@ -1,4 +1,4 @@
-package com.zyyoona7.lib
+package com.zyyoona7.extensions
 
 import android.app.Activity
 import android.app.Fragment
diff --git a/lib/src/main/java/com/zyyoona7/lib/resources.kt b/lib/src/main/java/com/zyyoona7/extensions/resources.kt
similarity index 99%
rename from lib/src/main/java/com/zyyoona7/lib/resources.kt
rename to lib/src/main/java/com/zyyoona7/extensions/resources.kt
index a40dca9..8097c46 100644
--- a/lib/src/main/java/com/zyyoona7/lib/resources.kt
+++ b/lib/src/main/java/com/zyyoona7/extensions/resources.kt
@@ -1,4 +1,4 @@
-package com.zyyoona7.lib
+package com.zyyoona7.extensions
 
 import android.app.Fragment
 import android.content.Context
diff --git a/lib/src/main/java/com/zyyoona7/lib/snackbar.kt b/lib/src/main/java/com/zyyoona7/extensions/snackbar.kt
similarity index 98%
rename from lib/src/main/java/com/zyyoona7/lib/snackbar.kt
rename to lib/src/main/java/com/zyyoona7/extensions/snackbar.kt
index 0150d95..c825b57 100644
--- a/lib/src/main/java/com/zyyoona7/lib/snackbar.kt
+++ b/lib/src/main/java/com/zyyoona7/extensions/snackbar.kt
@@ -1,4 +1,4 @@
-package com.zyyoona7.lib
+package com.zyyoona7.extensions
 
 import android.support.annotation.StringRes
 import android.support.design.widget.Snackbar
diff --git a/lib/src/main/java/com/zyyoona7/lib/systemService.kt b/lib/src/main/java/com/zyyoona7/extensions/systemService.kt
similarity index 99%
rename from lib/src/main/java/com/zyyoona7/lib/systemService.kt
rename to lib/src/main/java/com/zyyoona7/extensions/systemService.kt
index 619c979..18372d5 100644
--- a/lib/src/main/java/com/zyyoona7/lib/systemService.kt
+++ b/lib/src/main/java/com/zyyoona7/extensions/systemService.kt
@@ -1,4 +1,4 @@
-package com.zyyoona7.lib
+package com.zyyoona7.extensions
 
 import android.accounts.AccountManager
 import android.annotation.SuppressLint
diff --git a/lib/src/main/java/com/zyyoona7/lib/toast.kt b/lib/src/main/java/com/zyyoona7/extensions/toast.kt
similarity index 96%
rename from lib/src/main/java/com/zyyoona7/lib/toast.kt
rename to lib/src/main/java/com/zyyoona7/extensions/toast.kt
index de4fbc4..9242262 100644
--- a/lib/src/main/java/com/zyyoona7/lib/toast.kt
+++ b/lib/src/main/java/com/zyyoona7/extensions/toast.kt
@@ -1,4 +1,4 @@
-package com.zyyoona7.lib
+package com.zyyoona7.extensions
 
 import android.app.Fragment
 import android.content.Context
diff --git a/lib/src/main/java/com/zyyoona7/lib/views.kt b/lib/src/main/java/com/zyyoona7/extensions/views.kt
similarity index 96%
rename from lib/src/main/java/com/zyyoona7/lib/views.kt
rename to lib/src/main/java/com/zyyoona7/extensions/views.kt
index 3bab72d..688cce3 100644
--- a/lib/src/main/java/com/zyyoona7/lib/views.kt
+++ b/lib/src/main/java/com/zyyoona7/extensions/views.kt
@@ -1,4 +1,4 @@
-package com.zyyoona7.lib
+package com.zyyoona7.extensions
 
 import android.os.Build
 import android.view.View