diff --git a/FirUpdater/src/main/java/com/sunfusheng/FirAppInfo.java b/FirUpdater/src/main/java/com/sunfusheng/FirAppInfo.java
index 1a1eb45..384b0c0 100644
--- a/FirUpdater/src/main/java/com/sunfusheng/FirAppInfo.java
+++ b/FirUpdater/src/main/java/com/sunfusheng/FirAppInfo.java
@@ -82,7 +82,7 @@ private AppInfo parseResult(String result) {
             if (!TextUtils.isEmpty(versionCode)) {
                 appInfo.appVersionCode = Integer.parseInt(versionCode);
             }
-            appInfo.appVersionName = object.getString("versionShort");
+            appInfo.appVersionName = "V"+object.getString("versionShort");
             appInfo.appChangeLog = object.getString("changelog");
             appInfo.appInstallUrl = object.getString("installUrl");
             if (object.has("binary")) {
diff --git a/FirUpdater/src/main/java/com/sunfusheng/FirDialog.java b/FirUpdater/src/main/java/com/sunfusheng/FirDialog.java
index 18aa89b..269a1c3 100644
--- a/FirUpdater/src/main/java/com/sunfusheng/FirDialog.java
+++ b/FirUpdater/src/main/java/com/sunfusheng/FirDialog.java
@@ -5,6 +5,7 @@
 import android.content.DialogInterface;
 import android.graphics.Color;
 import android.support.v7.app.AlertDialog;
+import android.text.TextUtils;
 import android.widget.TextView;
 
 import java.lang.reflect.Field;
@@ -19,11 +20,20 @@ public class FirDialog {
 
     private OnClickDownloadDialogListener onClickDownloadDialogListener;
 
-    public void showAppInfoDialog(Context context, String title, String message) {
+    public void showAppInfoDialog(Context context, FirAppInfo.AppInfo appInfo) {
         if (alertDialog == null) {
+            StringBuilder sb = new StringBuilder();
+            sb.append("名称：").append(appInfo.appName);
+            sb.append("\n版本：").append(appInfo.appVersionName);
+            sb.append("\n文件大小：").append(FirUpdaterUtils.getMeasureSize(appInfo.appSize));
+            if (!TextUtils.isEmpty(appInfo.appChangeLog)) {
+                sb.append("\n\n更新日志：").append(appInfo.appChangeLog);
+            }
+
             alertDialog = new AlertDialog.Builder(context)
-                    .setTitle(title + "更新提示")
-                    .setMessage(message)
+                    .setCancelable(false)
+                    .setTitle("应用更新提示")
+                    .setMessage(sb)
                     .setPositiveButton("立即更新", (dialog, which) -> {
                         if (onClickDownloadDialogListener != null) {
                             onClickDownloadDialogListener.onClickDownload(dialog);
@@ -33,6 +43,7 @@ public void showAppInfoDialog(Context context, String title, String message) {
                     })
                     .create();
             alertDialog.show();
+
             alertDialog.getButton(AlertDialog.BUTTON_POSITIVE).setTextColor(Color.parseColor("#333333"));
             alertDialog.getButton(AlertDialog.BUTTON_NEGATIVE).setTextColor(Color.parseColor("#9a9a9a"));
 
@@ -43,6 +54,7 @@ public void showAppInfoDialog(Context context, String title, String message) {
                 Field messageView = alertController.getClass().getDeclaredField("mMessageView");
                 messageView.setAccessible(true);
                 TextView textView = (TextView) messageView.get(alertController);
+                textView.setTextSize(12);
                 textView.setTextColor(Color.parseColor("#9a9a9a"));
             } catch (IllegalAccessException e) {
                 e.printStackTrace();
diff --git a/FirUpdater/src/main/java/com/sunfusheng/FirUpdater.java b/FirUpdater/src/main/java/com/sunfusheng/FirUpdater.java
index 42e70c3..0b07b6c 100644
--- a/FirUpdater/src/main/java/com/sunfusheng/FirUpdater.java
+++ b/FirUpdater/src/main/java/com/sunfusheng/FirUpdater.java
@@ -48,19 +48,20 @@ public FirUpdater setApkPath(String apkPath) {
     public void checkVersion() {
         new Thread(() -> {
             appInfo = new FirAppInfo().requestAppInfo(appVersionUrl);
-            boolean needUpdate = appInfo.appVersionCode > FirUpdaterUtils.getVersionCode(context);
+            if (appInfo == null) {
+                return;
+            }
 
-            FirUpdaterUtils.runOnMainThread(() -> {
-                if (appInfo != null && (forceShowDialog || needUpdate)) {
-                    initFirDialog();
-                }
-            });
+            boolean needUpdate = appInfo.appVersionCode > FirUpdaterUtils.getVersionCode(context);
+            if (forceShowDialog || needUpdate) {
+                FirUpdaterUtils.runOnMainThread(this::initFirDialog);
+            }
         }).start();
     }
 
     private void initFirDialog() {
         firDialog = new FirDialog();
-        firDialog.showAppInfoDialog(context, appInfo.appName, appInfo.appChangeLog);
+        firDialog.showAppInfoDialog(context, appInfo);
         firDialog.setOnClickDownloadDialogListener(new FirDialog.OnClickDownloadDialogListener() {
             @Override
             public void onClickDownload(DialogInterface dialog) {
diff --git a/FirUpdater/src/main/java/com/sunfusheng/FirUpdaterUtils.java b/FirUpdater/src/main/java/com/sunfusheng/FirUpdaterUtils.java
index 9d95ad7..0929a09 100644
--- a/FirUpdater/src/main/java/com/sunfusheng/FirUpdaterUtils.java
+++ b/FirUpdater/src/main/java/com/sunfusheng/FirUpdaterUtils.java
@@ -1,5 +1,6 @@
 package com.sunfusheng;
 
+import android.annotation.SuppressLint;
 import android.app.ActivityManager;
 import android.content.Context;
 import android.content.Intent;
@@ -152,6 +153,21 @@ public static void closeQuietly(final Closeable... closeables) {
         }
     }
 
+    @SuppressLint("DefaultLocale")
+    public static String getMeasureSize(long byteCount) {
+        if (byteCount <= 0) {
+            return "0B";
+        } else if (byteCount < 1024) {
+            return String.format("%.2fB", (double) byteCount);
+        } else if (byteCount < 1048576) {
+            return String.format("%.2fKB", (double) byteCount / 1024);
+        } else if (byteCount < 1073741824) {
+            return String.format("%.2fMB", (double) byteCount / 1048576);
+        } else {
+            return String.format("%.2fGB", (double) byteCount / 1073741824);
+        }
+    }
+
     private static final Handler handler = new Handler(Looper.getMainLooper());
 
     public static void runOnMainThread(Runnable runnable) {
@@ -162,6 +178,5 @@ public static void runOnMainThread(Runnable runnable) {
                 runnable.run();
             }
         }
-
     }
 }
diff --git a/settings.gradle b/settings.gradle
index f313c28..4c40cec 100644
--- a/settings.gradle
+++ b/settings.gradle
@@ -6,5 +6,5 @@ gradle.ext.supportLibraryVersion = '27.0.2'
 
 gradle.ext.minSdkVersion = 14
 gradle.ext.targetSdkVersion = 27
-gradle.ext.versionCode = 3
-gradle.ext.versionName = "1.0.2"
+gradle.ext.versionCode = 4
+gradle.ext.versionName = "1.0.3"