diff --git a/.idea/deploymentTargetDropDown.xml b/.idea/deploymentTargetDropDown.xml
index 9c96b2b..4ea7061 100644
--- a/.idea/deploymentTargetDropDown.xml
+++ b/.idea/deploymentTargetDropDown.xml
@@ -3,7 +3,20 @@
   <component name="deploymentTargetDropDown">
     <value>
       <entry key="MainActivity">
-        <State />
+        <State>
+          <runningDeviceTargetSelectedWithDropDown>
+            <Target>
+              <type value="RUNNING_DEVICE_TARGET" />
+              <deviceKey>
+                <Key>
+                  <type value="VIRTUAL_DEVICE_PATH" />
+                  <value value="$USER_HOME$/.android/avd/Resizable_Experimental_API_34.avd" />
+                </Key>
+              </deviceKey>
+            </Target>
+          </runningDeviceTargetSelectedWithDropDown>
+          <timeTargetWasSelectedWithDropDown value="2024-03-26T06:34:42.198995747Z" />
+        </State>
       </entry>
       <entry key="app">
         <State />
diff --git a/app/build.gradle.kts b/app/build.gradle.kts
index 1bdbdee..28a967a 100644
--- a/app/build.gradle.kts
+++ b/app/build.gradle.kts
@@ -11,8 +11,8 @@ android {
         applicationId = "uk.kagurach.android101"
         minSdk = 31
         targetSdk = 34
-        versionCode = 1
-        versionName = "1.0"
+        versionCode = 101
+        versionName = "1.0.1"
 
         testInstrumentationRunner = "androidx.test.runner.AndroidJUnitRunner"
     }
diff --git a/app/src/main/java/uk/kagurach/android101/MainActivity2.java b/app/src/main/java/uk/kagurach/android101/MainActivity2.java
index d45ed9d..2ba5d30 100644
--- a/app/src/main/java/uk/kagurach/android101/MainActivity2.java
+++ b/app/src/main/java/uk/kagurach/android101/MainActivity2.java
@@ -4,7 +4,6 @@ import android.content.Context;
 import android.content.Intent;
 import android.graphics.Color;
 import android.os.Bundle;
-import android.util.Log;
 import android.util.TypedValue;
 import android.view.MotionEvent;
 import android.view.View;
@@ -65,24 +64,28 @@ public class MainActivity2 extends AppCompatActivity {
         EditText b_edit =  (EditText) findViewById(R.id.B);
 
         int _r,_g,_b;
+        // Here we are testing toast
+        if( r_edit.getText().toString().isEmpty() ||
+                g_edit.getText().toString().isEmpty()||
+                b_edit.getText().toString().isEmpty() ){
+            ToastHelper.SmartToast.ShowToast("""
+                            Please input R,G,B within 0-255
+                            请在大小选择下方输入0-255的RGB""",
+                    this);
+        }
+
         try {
             _r = Integer.parseInt(r_edit.getText().toString());
             _g = Integer.parseInt(g_edit.getText().toString());
             _b = Integer.parseInt(b_edit.getText().toString());
         } catch (NumberFormatException e){
-            NotificationHelper helper =  new NotificationHelper(this);
-            helper.createNotificationChannel();
-            helper.pushNotification("Page 2: Error Setting Color",
-                    e.toString());
+            ToastHelper.SmartToast.ShowToast(e.toString(),this);
             return;
         }
         if (_r>=0&&_g>=0&&_b>=0&&_r<=255&&_g<=255&&_b<=255){
             t.setTextColor(Color.rgb(_r,_g,_b));
         }else{
-            NotificationHelper helper =  new NotificationHelper(this);
-            helper.createNotificationChannel();
-            helper.pushNotification("Page 2: Error Setting Color",
-                    "The color: R="+_r+" G="+_g+" B="+_b+" is invalid!");
+            ToastHelper.SmartToast.ShowToast("The color: R="+_r+" G="+_g+" B="+_b+" is invalid!",this);
         }
 
     }
@@ -93,10 +96,7 @@ public class MainActivity2 extends AppCompatActivity {
         try {
             s = editText.getText().toString();
         }catch (Exception e){
-            NotificationHelper helper =  new NotificationHelper(this);
-            helper.createNotificationChannel();
-            helper.pushNotification("Page 2: Error Setting Test Text",
-                    e.toString());
+            ToastHelper.SmartToast.ShowToast(e.toString(),this);
             return;
         }
         textView.setText(s);
@@ -122,10 +122,7 @@ public class MainActivity2 extends AppCompatActivity {
         try {
             size = Integer.parseInt(ed.getText().toString());
         }catch (Exception e){
-            NotificationHelper helper =  new NotificationHelper(this);
-            helper.createNotificationChannel();
-            helper.pushNotification("Page 2: Error Setting Text Size",
-                    e.toString());
+            ToastHelper.SmartToast.ShowToast(e.toString(),this);
             return;
         }
         _text_size = size;
diff --git a/app/src/main/java/uk/kagurach/android101/ToastHelper.kt b/app/src/main/java/uk/kagurach/android101/ToastHelper.kt
new file mode 100644
index 0000000..782ccea
--- /dev/null
+++ b/app/src/main/java/uk/kagurach/android101/ToastHelper.kt
@@ -0,0 +1,27 @@
+package uk.kagurach.android101
+
+import android.content.Context
+import android.widget.Toast
+
+class ToastHelper(text: String,ctx: Context) {
+    val _text = text
+    val _ctx  = ctx
+
+    companion object SmartToast {
+        fun ShowToast(text: String,ctx: Context){
+            val helper = ToastHelper(text,ctx)
+            helper.autoShow()
+        }
+    }
+    fun autoShow(){
+        if (_text.contains('\n')){
+            for (line in _text.split('\n')){
+                Toast.makeText(_ctx,line,Toast.LENGTH_SHORT).show()
+                Thread.sleep(Toast.LENGTH_SHORT.toLong()+5)
+            }
+        }else{
+            Toast.makeText(_ctx,_text,Toast.LENGTH_LONG).show()
+        }
+    }
+
+}
\ No newline at end of file
diff --git a/app/src/main/res/layout/activity_main2.xml b/app/src/main/res/layout/activity_main2.xml
index b2b85fe..794678d 100644
--- a/app/src/main/res/layout/activity_main2.xml
+++ b/app/src/main/res/layout/activity_main2.xml
@@ -23,7 +23,7 @@
             android:layout_height="350dp">
             <TextView
                 android:id="@+id/test2strview"
-                android:layout_width="match_parent"
+                android:layout_width="wrap_content"
                 android:layout_height="wrap_content"
                 android:text="@string/test_str"
                 android:textSize="60sp"/>
diff --git a/app/src/main/res/mipmap-anydpi/ic_launcher.xml b/app/src/main/res/mipmap-anydpi/ic_launcher.xml
deleted file mode 100644
index 6f3b755..0000000
--- a/app/src/main/res/mipmap-anydpi/ic_launcher.xml
+++ /dev/null
@@ -1,6 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<adaptive-icon xmlns:android="http://schemas.android.com/apk/res/android">
-    <background android:drawable="@drawable/ic_launcher_background" />
-    <foreground android:drawable="@drawable/ic_launcher_foreground" />
-    <monochrome android:drawable="@drawable/ic_launcher_foreground" />
-</adaptive-icon>
\ No newline at end of file
diff --git a/app/src/main/res/mipmap-anydpi/ic_launcher_round.xml b/app/src/main/res/mipmap-anydpi/ic_launcher_round.xml
deleted file mode 100644
index 6f3b755..0000000
--- a/app/src/main/res/mipmap-anydpi/ic_launcher_round.xml
+++ /dev/null
@@ -1,6 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<adaptive-icon xmlns:android="http://schemas.android.com/apk/res/android">
-    <background android:drawable="@drawable/ic_launcher_background" />
-    <foreground android:drawable="@drawable/ic_launcher_foreground" />
-    <monochrome android:drawable="@drawable/ic_launcher_foreground" />
-</adaptive-icon>
\ No newline at end of file
diff --git a/app/src/main/res/mipmap-hdpi/ic_launcher.png b/app/src/main/res/mipmap-hdpi/ic_launcher.png
new file mode 100644
index 0000000..bfb7c26
Binary files /dev/null and b/app/src/main/res/mipmap-hdpi/ic_launcher.png differ
diff --git a/app/src/main/res/mipmap-hdpi/ic_launcher.webp b/app/src/main/res/mipmap-hdpi/ic_launcher.webp
deleted file mode 100644
index c209e78..0000000
Binary files a/app/src/main/res/mipmap-hdpi/ic_launcher.webp and /dev/null differ
diff --git a/app/src/main/res/mipmap-hdpi/ic_launcher_round.png b/app/src/main/res/mipmap-hdpi/ic_launcher_round.png
new file mode 100644
index 0000000..d98503c
Binary files /dev/null and b/app/src/main/res/mipmap-hdpi/ic_launcher_round.png differ
diff --git a/app/src/main/res/mipmap-hdpi/ic_launcher_round.webp b/app/src/main/res/mipmap-hdpi/ic_launcher_round.webp
deleted file mode 100644
index b2dfe3d..0000000
Binary files a/app/src/main/res/mipmap-hdpi/ic_launcher_round.webp and /dev/null differ
diff --git a/app/src/main/res/mipmap-mdpi/ic_launcher.png b/app/src/main/res/mipmap-mdpi/ic_launcher.png
new file mode 100644
index 0000000..464a86c
Binary files /dev/null and b/app/src/main/res/mipmap-mdpi/ic_launcher.png differ
diff --git a/app/src/main/res/mipmap-mdpi/ic_launcher.webp b/app/src/main/res/mipmap-mdpi/ic_launcher.webp
deleted file mode 100644
index 4f0f1d6..0000000
Binary files a/app/src/main/res/mipmap-mdpi/ic_launcher.webp and /dev/null differ
diff --git a/app/src/main/res/mipmap-mdpi/ic_launcher_round.png b/app/src/main/res/mipmap-mdpi/ic_launcher_round.png
new file mode 100644
index 0000000..99a840a
Binary files /dev/null and b/app/src/main/res/mipmap-mdpi/ic_launcher_round.png differ
diff --git a/app/src/main/res/mipmap-mdpi/ic_launcher_round.webp b/app/src/main/res/mipmap-mdpi/ic_launcher_round.webp
deleted file mode 100644
index 62b611d..0000000
Binary files a/app/src/main/res/mipmap-mdpi/ic_launcher_round.webp and /dev/null differ
diff --git a/app/src/main/res/mipmap-xhdpi/ic_launcher.png b/app/src/main/res/mipmap-xhdpi/ic_launcher.png
new file mode 100644
index 0000000..8998681
Binary files /dev/null and b/app/src/main/res/mipmap-xhdpi/ic_launcher.png differ
diff --git a/app/src/main/res/mipmap-xhdpi/ic_launcher.webp b/app/src/main/res/mipmap-xhdpi/ic_launcher.webp
deleted file mode 100644
index 948a307..0000000
Binary files a/app/src/main/res/mipmap-xhdpi/ic_launcher.webp and /dev/null differ
diff --git a/app/src/main/res/mipmap-xhdpi/ic_launcher_round.png b/app/src/main/res/mipmap-xhdpi/ic_launcher_round.png
new file mode 100644
index 0000000..cbf466a
Binary files /dev/null and b/app/src/main/res/mipmap-xhdpi/ic_launcher_round.png differ
diff --git a/app/src/main/res/mipmap-xhdpi/ic_launcher_round.webp b/app/src/main/res/mipmap-xhdpi/ic_launcher_round.webp
deleted file mode 100644
index 1b9a695..0000000
Binary files a/app/src/main/res/mipmap-xhdpi/ic_launcher_round.webp and /dev/null differ
diff --git a/app/src/main/res/mipmap-xxhdpi/ic_launcher.png b/app/src/main/res/mipmap-xxhdpi/ic_launcher.png
new file mode 100644
index 0000000..e9ac990
Binary files /dev/null and b/app/src/main/res/mipmap-xxhdpi/ic_launcher.png differ
diff --git a/app/src/main/res/mipmap-xxhdpi/ic_launcher.webp b/app/src/main/res/mipmap-xxhdpi/ic_launcher.webp
deleted file mode 100644
index 28d4b77..0000000
Binary files a/app/src/main/res/mipmap-xxhdpi/ic_launcher.webp and /dev/null differ
diff --git a/app/src/main/res/mipmap-xxhdpi/ic_launcher_round.png b/app/src/main/res/mipmap-xxhdpi/ic_launcher_round.png
new file mode 100644
index 0000000..c72f815
Binary files /dev/null and b/app/src/main/res/mipmap-xxhdpi/ic_launcher_round.png differ
diff --git a/app/src/main/res/mipmap-xxhdpi/ic_launcher_round.webp b/app/src/main/res/mipmap-xxhdpi/ic_launcher_round.webp
deleted file mode 100644
index 9287f50..0000000
Binary files a/app/src/main/res/mipmap-xxhdpi/ic_launcher_round.webp and /dev/null differ
diff --git a/app/src/main/res/mipmap-xxxhdpi/ic_launcher.png b/app/src/main/res/mipmap-xxxhdpi/ic_launcher.png
new file mode 100644
index 0000000..cf934a2
Binary files /dev/null and b/app/src/main/res/mipmap-xxxhdpi/ic_launcher.png differ
diff --git a/app/src/main/res/mipmap-xxxhdpi/ic_launcher.webp b/app/src/main/res/mipmap-xxxhdpi/ic_launcher.webp
deleted file mode 100644
index aa7d642..0000000
Binary files a/app/src/main/res/mipmap-xxxhdpi/ic_launcher.webp and /dev/null differ
diff --git a/app/src/main/res/mipmap-xxxhdpi/ic_launcher_round.png b/app/src/main/res/mipmap-xxxhdpi/ic_launcher_round.png
new file mode 100644
index 0000000..44d6f2e
Binary files /dev/null and b/app/src/main/res/mipmap-xxxhdpi/ic_launcher_round.png differ
diff --git a/app/src/main/res/mipmap-xxxhdpi/ic_launcher_round.webp b/app/src/main/res/mipmap-xxxhdpi/ic_launcher_round.webp
deleted file mode 100644
index 9126ae3..0000000
Binary files a/app/src/main/res/mipmap-xxxhdpi/ic_launcher_round.webp and /dev/null differ