diff --git a/app/src/main/AndroidManifest.xml b/app/src/main/AndroidManifest.xml
index a195fbd..4cdb4f1 100644
--- a/app/src/main/AndroidManifest.xml
+++ b/app/src/main/AndroidManifest.xml
@@ -5,7 +5,7 @@
     <uses-permission android:name="android.permission.INTERNET" />
 
     <application
-        android:name=".MyApplication"
+        android:name=".YandViewApplication"
         android:allowBackup="true"
         android:icon="@mipmap/ic_launcher"
         android:label="@string/app_name"
diff --git a/app/src/main/java/com/lsp/view/YandViewApplication.kt b/app/src/main/java/com/lsp/view/YandViewApplication.kt
index e8777d2..5a97a67 100644
--- a/app/src/main/java/com/lsp/view/YandViewApplication.kt
+++ b/app/src/main/java/com/lsp/view/YandViewApplication.kt
@@ -1,72 +1,58 @@
-package com.lsp.view;
+package com.lsp.view
 
-import android.app.Application;
-import android.content.ComponentName;
-import android.content.Context;
-import android.content.Intent;
-import android.content.ServiceConnection;
-import android.os.IBinder;
+import android.app.Application
+import androidx.lifecycle.DefaultLifecycleObserver
+import android.content.ServiceConnection
+import android.content.ComponentName
+import android.content.Context
+import android.os.IBinder
+import com.lsp.view.service.DownloadService.DownloadBinder
+import com.google.android.material.color.DynamicColors
+import android.content.Intent
+import com.lsp.view.service.DownloadService
+import androidx.lifecycle.LifecycleOwner
 
-import androidx.annotation.NonNull;
-import androidx.lifecycle.DefaultLifecycleObserver;
-import androidx.lifecycle.LifecycleOwner;
-
-import com.google.android.material.color.DynamicColors;
-import com.lsp.view.service.DownloadService;
-
-public class MyApplication extends Application implements DefaultLifecycleObserver{
-    private static Context context;
-    private static DownloadService.DownloadBinder downloadBinder;
-    private final ServiceConnection connection = new ServiceConnection(){
-
-        @Override
-        public void onServiceConnected(ComponentName componentName, IBinder iBinder) {
-            downloadBinder = (DownloadService.DownloadBinder) iBinder;
+class YandViewApplication : Application(), DefaultLifecycleObserver {
+    private val connection: ServiceConnection = object : ServiceConnection {
+        override fun onServiceConnected(componentName: ComponentName, iBinder: IBinder) {
+            downloadBinder = iBinder as DownloadBinder
         }
 
-        @Override
-        public void onServiceDisconnected(ComponentName componentName) {
-
-        }
-    };
-
-    @Override
-    public void onCreate() {
-        super.onCreate();
-        context = getApplicationContext();
-        DynamicColors.applyToActivitiesIfAvailable(this);
-
-        Intent serviceIntent = new Intent(this, DownloadService.class);
-        bindService(serviceIntent, connection, Context.BIND_AUTO_CREATE);
-
-        statusBarHeight();
+        override fun onServiceDisconnected(componentName: ComponentName) {}
     }
 
-    @Override
-    public void onDestroy(@NonNull LifecycleOwner owner) {
-        DefaultLifecycleObserver.super.onDestroy(owner);
-        unbindService(connection);
+    override fun onCreate() {
+        super<Application>.onCreate()
+        context = applicationContext
+        DynamicColors.applyToActivitiesIfAvailable(this)
+        val serviceIntent = Intent(this, DownloadService::class.java)
+        bindService(serviceIntent, connection, BIND_AUTO_CREATE)
+        statusBarHeight()
     }
 
-    public static Context getContext() {
-        return context;
-    }
-
-    public static DownloadService.DownloadBinder getDownloadBinder() {
-        return downloadBinder;
+    override fun onDestroy(owner: LifecycleOwner) {
+        super.onDestroy(owner)
+        unbindService(connection)
     }
 
     //计算状态栏高度
-    public int statusBarHeight() {
-        int height = 0;
-        int resourceId = getResources().getIdentifier(
-                "status_bar_height",
-                "dimen",
-                "android"
-        );
+    fun statusBarHeight(): Int {
+        var height = 0
+        val resourceId = resources.getIdentifier(
+            "status_bar_height",
+            "dimen",
+            "android"
+        )
         if (resourceId > 0) {
-            height = getResources().getDimensionPixelSize(resourceId);
+            height = resources.getDimensionPixelSize(resourceId)
         }
-        return height;
+        return height
     }
-}
+
+    companion object {
+        var context: Context? = null
+            private set
+        var downloadBinder: DownloadBinder? = null
+            private set
+    }
+}
\ No newline at end of file
diff --git a/app/src/main/java/com/lsp/view/activity/favtag/FavTagActivity.kt b/app/src/main/java/com/lsp/view/activity/favtag/FavTagActivity.kt
index 0263785..fb6f5cd 100644
--- a/app/src/main/java/com/lsp/view/activity/favtag/FavTagActivity.kt
+++ b/app/src/main/java/com/lsp/view/activity/favtag/FavTagActivity.kt
@@ -11,7 +11,7 @@ import com.google.android.flexbox.*
 import com.google.android.material.appbar.AppBarLayout
 import com.google.gson.Gson
 import com.google.gson.reflect.TypeToken
-import com.lsp.view.MyApplication
+import com.lsp.view.YandViewApplication
 import com.lsp.view.R
 import com.lsp.view.activity.BaseActivity
 import com.lsp.view.activity.main.MainActivity
@@ -28,7 +28,7 @@ class FavTagActivity : BaseActivity() {
         setSupportActionBar(toolbar)
         val appbar = findViewById<AppBarLayout>(R.id.appbar)
         val nowHeight = appbar.layoutParams.height
-        appbar.layoutParams.height = (application as MyApplication).statusBarHeight()+nowHeight
+        appbar.layoutParams.height = (application as YandViewApplication).statusBarHeight()+nowHeight
         supportActionBar?.setDisplayHomeAsUpEnabled(true)
         supportActionBar?.setHomeButtonEnabled(true)
 
diff --git a/app/src/main/java/com/lsp/view/activity/main/MainActivity.kt b/app/src/main/java/com/lsp/view/activity/main/MainActivity.kt
index 6cda1f2..fb8ebfd 100644
--- a/app/src/main/java/com/lsp/view/activity/main/MainActivity.kt
+++ b/app/src/main/java/com/lsp/view/activity/main/MainActivity.kt
@@ -21,7 +21,7 @@ import androidx.recyclerview.widget.StaggeredGridLayoutManager
 import com.google.android.material.appbar.AppBarLayout
 import com.google.android.material.navigation.NavigationView
 import com.google.android.material.snackbar.Snackbar
-import com.lsp.view.MyApplication
+import com.lsp.view.YandViewApplication
 import com.lsp.view.R
 import com.lsp.view.activity.BaseActivity
 import com.lsp.view.activity.favtag.FavTagActivity
@@ -60,7 +60,7 @@ class MainActivity : BaseActivity() {
         setSupportActionBar(toolbar)
         val appbar = findViewById<AppBarLayout>(R.id.appbar)
         val nowHeight = appbar.layoutParams.height
-        appbar.layoutParams.height = (application as MyApplication).statusBarHeight()+nowHeight
+        appbar.layoutParams.height = (application as YandViewApplication).statusBarHeight()+nowHeight
 
         //到达底部，加载更多数据
         adapter.setLoadMoreListener(object : PostAdapter.OnLoadMoreListener {
diff --git a/app/src/main/java/com/lsp/view/activity/setting/SettingsActivity.kt b/app/src/main/java/com/lsp/view/activity/setting/SettingsActivity.kt
index e77e52f..78b75b8 100644
--- a/app/src/main/java/com/lsp/view/activity/setting/SettingsActivity.kt
+++ b/app/src/main/java/com/lsp/view/activity/setting/SettingsActivity.kt
@@ -5,7 +5,7 @@ import android.view.MenuItem
 import androidx.appcompat.widget.Toolbar
 import androidx.preference.PreferenceFragmentCompat
 import com.google.android.material.appbar.AppBarLayout
-import com.lsp.view.MyApplication
+import com.lsp.view.YandViewApplication
 import com.lsp.view.R
 import com.lsp.view.activity.BaseActivity
 
@@ -20,7 +20,7 @@ class SettingsActivity : BaseActivity() {
 
         val appbar = findViewById<AppBarLayout>(R.id.appbar)
         val nowHeight = appbar.layoutParams.height
-        appbar.layoutParams.height = (application as MyApplication).statusBarHeight()+nowHeight
+        appbar.layoutParams.height = (application as YandViewApplication).statusBarHeight()+nowHeight
 
         if (savedInstanceState == null) {
             supportFragmentManager
diff --git a/app/src/main/java/com/lsp/view/util/Util.kt b/app/src/main/java/com/lsp/view/util/Util.kt
index 13dfc3d..edb675c 100644
--- a/app/src/main/java/com/lsp/view/util/Util.kt
+++ b/app/src/main/java/com/lsp/view/util/Util.kt
@@ -11,7 +11,7 @@ import android.os.Message
 import android.widget.Toast
 import androidx.core.content.FileProvider
 import com.bumptech.glide.Glide
-import com.lsp.view.MyApplication
+import com.lsp.view.YandViewApplication
 import java.io.File
 import kotlin.concurrent.thread
 
@@ -65,11 +65,11 @@ object Util {
     }
 
     fun download(file_url: String?, file_ext: String?,md5: String?){
-        Toast.makeText(MyApplication.getContext(), "开始保存", Toast.LENGTH_SHORT).show()
+        Toast.makeText(YandViewApplication.context, "开始保存", Toast.LENGTH_SHORT).show()
 
         if (file_url != null) {
             if (file_ext != null) {
-                MyApplication.getDownloadBinder().downloadPic(file_url, file_ext,handler,md5)
+                YandViewApplication.downloadBinder?.downloadPic(file_url, file_ext,handler,md5)
             }
         }
     }
@@ -79,19 +79,19 @@ object Util {
             super.handleMessage(msg)
             when(msg.what){
                 CallBackStatus.OK.ordinal ->{
-                    Toast.makeText(MyApplication.getContext(), "保存成功", Toast.LENGTH_SHORT).show()
+                    Toast.makeText(YandViewApplication.context, "保存成功", Toast.LENGTH_SHORT).show()
                 }
 
                 CallBackStatus.DOWNLOADERROR.ordinal -> {
-                    Toast.makeText(MyApplication.getContext(), "下载异常", Toast.LENGTH_SHORT).show()
+                    Toast.makeText(YandViewApplication.context, "下载异常", Toast.LENGTH_SHORT).show()
 
                 }
                 CallBackStatus.MD5COMPAREERROR.ordinal -> {
-                    Toast.makeText(MyApplication.getContext(), "文件下载异常，MD5对比失败", Toast.LENGTH_SHORT).show()
+                    Toast.makeText(YandViewApplication.context, "文件下载异常，MD5对比失败", Toast.LENGTH_SHORT).show()
 
                 }
                 CallBackStatus.FILEEXISTS.ordinal -> {
-                    Toast.makeText(MyApplication.getContext(), "文件已经存在", Toast.LENGTH_SHORT).show()
+                    Toast.makeText(YandViewApplication.context, "文件已经存在", Toast.LENGTH_SHORT).show()
 
                 }
             }