diff --git a/app/src/main/java/com/xypower/frpandroid/MainActivity.java b/app/src/main/java/com/xypower/frpandroid/MainActivity.java
index c7a357e..acd9b94 100644
--- a/app/src/main/java/com/xypower/frpandroid/MainActivity.java
+++ b/app/src/main/java/com/xypower/frpandroid/MainActivity.java
@@ -16,6 +16,7 @@ import android.os.IBinder;
 import android.support.v7.app.AppCompatActivity;
 import android.os.Bundle;
 import android.support.v7.widget.SwitchCompat;
+import android.telephony.SubscriptionManager;
 import android.text.TextUtils;
 import android.util.Log;
 import android.view.KeyEvent;
@@ -25,17 +26,13 @@ import android.widget.CompoundButton;
 import android.widget.Switch;
 import android.widget.TextView;
 
-import com.moandjiezana.toml.Toml;
-import com.moandjiezana.toml.TomlWriter;
+import com.xypower.common.FilesUtils;
 
 import org.jetbrains.annotations.NotNull;
 
 import java.io.Closeable;
 import java.io.File;
-import java.io.FileNotFoundException;
-import java.io.FileOutputStream;
 import java.io.InputStream;
-import java.util.Arrays;
 import java.util.Iterator;
 
 public class MainActivity extends AppCompatActivity {
@@ -46,6 +43,9 @@ public class MainActivity extends AppCompatActivity {
     private ShellService mService;
     private boolean mBound;
 
+    private static final String MICRO_KEY_SERVER = "%%SERVER%%";
+    private static final String MICRO_KEY_PORT = "%%PORT%%";
+
     Handler mHandler;
 
     private String mServer = "61.169.135.146";
@@ -85,7 +85,26 @@ public class MainActivity extends AppCompatActivity {
         // Intrinsics.checkNotNullExpressionValue(titleText, "titleText");
         titleText.setText((CharSequence)("frp for Android - " + versionName + "/0.58.0"));
 
-        checkConfig();
+        int startFrp = 0;
+        int autoClose = 0;
+        {
+            Intent intent = getIntent();
+            String server = intent.getStringExtra("server");
+            mPort = intent.getIntExtra("port", 7000);
+            startFrp = intent.getIntExtra("startFrp", 0);
+            if (!TextUtils.isEmpty(server)) {
+                mServer = server;
+            }
+
+            if (startFrp != 0) {
+                Log.i(TAG, "Will start server");
+            }
+
+            autoClose = intent.getIntExtra("autoClose", 0);
+
+        }
+
+        checkConfig(mServer, mPort);
         checkNotificationPermission();
         createBGNotificationChannel();
 
@@ -100,7 +119,6 @@ public class MainActivity extends AppCompatActivity {
                 } else {
                     MainActivity.this.stopShell();
                 }
-
             }
         }));
 
@@ -125,33 +143,17 @@ public class MainActivity extends AppCompatActivity {
 
         this.setListener();
 
-        int startFrp = 0;
-        {
-            Intent intent = getIntent();
-            String server = intent.getStringExtra("server");
-            mPort = intent.getIntExtra("port", 7000);
-            startFrp = intent.getIntExtra("startFrp", 0);
-            if (!TextUtils.isEmpty(server)) {
-                mServer = server;
-            }
-
-            if (startFrp != 0) {
-                Log.i(TAG, "Will start server");
-            }
+        state_switch.setChecked(mBound || (startFrp != 0));
 
-            int autoClose = intent.getIntExtra("autoClose", 0);
-            if (autoClose != 0) {
+        if (autoClose != 0) {
 
-                mHandler.postDelayed(new Runnable() {
-                    @Override
-                    public void run() {
-                        MainActivity.this.finish();
-                    }
-                }, 2000);
-            }
+            mHandler.postDelayed(new Runnable() {
+                @Override
+                public void run() {
+                    MainActivity.this.finish();
+                }
+            }, 2000);
         }
-
-        state_switch.setChecked(mBound || (startFrp != 0));
     }
 
     private final void setListener() {
@@ -190,7 +192,7 @@ public class MainActivity extends AppCompatActivity {
 
     }
 
-    public final void checkConfig() {
+    public final void checkConfig(String server, int port) {
         // Intrinsics.checkNotNullExpressionValue(var12, "resources");
         AssetManager assetmanager = getResources().getAssets();
 
@@ -199,35 +201,19 @@ public class MainActivity extends AppCompatActivity {
             confFile.mkdirs();
         }
         File file = new File(new File(getDataDir(), "conf"), "config.toml");
-        FileOutputStream fileOutputStream = null;
-        try {
-            fileOutputStream = new FileOutputStream(file);
-        } catch (FileNotFoundException e) {
-            e.printStackTrace();
-        } catch (Exception ex) {
-            ex.printStackTrace();
-        }
-
-        if (fileOutputStream == null) {
-            return;
-        }
 
+        StringBuffer configContent = new StringBuffer();
         InputStream inputStream = null;
-        byte[] bytes = new byte[256];
-        int bytesRead = -1;
         try {
             inputStream = assetmanager.open("config.toml");
-            // Intrinsics.checkNotNullExpressionValue(var10001, "assetmanager.open((BuildConfig.ConfigFileName))");
-            while ((bytesRead = inputStream.read(bytes)) != -1) {
-                if (bytesRead > 0) {
-                    fileOutputStream.write(bytes, 0, bytesRead);
-                }
-            }
-            // Unit var11 = Unit.INSTANCE;
+            String content = FilesUtils.readTextFile(inputStream);
+            content = content.replaceAll(MICRO_KEY_SERVER, server);
+            content = content.replaceAll(MICRO_KEY_PORT, Integer.toString(port));
+
+            FilesUtils.writeTextFile(file.getAbsolutePath(), content);
         } catch (Throwable ex) {
             ex.printStackTrace();
         } finally {
-            closeFinally(fileOutputStream);
             closeFinally(inputStream);
         }