diff --git a/songyuxuan-2020300803/Login/.gitignore b/songyuxuan-2020300803/Login/.gitignore
new file mode 100644
index 0000000000000000000000000000000000000000..aa724b77071afcbd9bb398053e05adaf7ac9405a
--- /dev/null
+++ b/songyuxuan-2020300803/Login/.gitignore
@@ -0,0 +1,15 @@
+*.iml
+.gradle
+/local.properties
+/.idea/caches
+/.idea/libraries
+/.idea/modules.xml
+/.idea/workspace.xml
+/.idea/navEditor.xml
+/.idea/assetWizardSettings.xml
+.DS_Store
+/build
+/captures
+.externalNativeBuild
+.cxx
+local.properties
diff --git a/songyuxuan-2020300803/Login/.idea/.gitignore b/songyuxuan-2020300803/Login/.idea/.gitignore
new file mode 100644
index 0000000000000000000000000000000000000000..26d33521af10bcc7fd8cea344038eaaeb78d0ef5
--- /dev/null
+++ b/songyuxuan-2020300803/Login/.idea/.gitignore
@@ -0,0 +1,3 @@
+# Default ignored files
+/shelf/
+/workspace.xml
diff --git a/songyuxuan-2020300803/Login/.idea/compiler.xml b/songyuxuan-2020300803/Login/.idea/compiler.xml
new file mode 100644
index 0000000000000000000000000000000000000000..fb7f4a8a465d42b4a0390d464b83b99e8465bba7
--- /dev/null
+++ b/songyuxuan-2020300803/Login/.idea/compiler.xml
@@ -0,0 +1,6 @@
+
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+
\ No newline at end of file
diff --git a/songyuxuan-2020300803/Login/.idea/dbnavigator.xml b/songyuxuan-2020300803/Login/.idea/dbnavigator.xml
new file mode 100644
index 0000000000000000000000000000000000000000..c1a0a2ad4637fd4be5528cd8a8fa9ad9a774c5dc
--- /dev/null
+++ b/songyuxuan-2020300803/Login/.idea/dbnavigator.xml
@@ -0,0 +1,458 @@
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diff --git a/songyuxuan-2020300803/Login/.idea/gradle.xml b/songyuxuan-2020300803/Login/.idea/gradle.xml
new file mode 100644
index 0000000000000000000000000000000000000000..526b4c25c6813ef690dfffafcf9a523c789c94a7
--- /dev/null
+++ b/songyuxuan-2020300803/Login/.idea/gradle.xml
@@ -0,0 +1,20 @@
+
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\ No newline at end of file
diff --git a/songyuxuan-2020300803/Login/.idea/misc.xml b/songyuxuan-2020300803/Login/.idea/misc.xml
new file mode 100644
index 0000000000000000000000000000000000000000..2b171c9e124ffa3d726e333908727159a8779ce3
--- /dev/null
+++ b/songyuxuan-2020300803/Login/.idea/misc.xml
@@ -0,0 +1,22 @@
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\ No newline at end of file
diff --git a/songyuxuan-2020300803/Login/app/.gitignore b/songyuxuan-2020300803/Login/app/.gitignore
new file mode 100644
index 0000000000000000000000000000000000000000..42afabfd2abebf31384ca7797186a27a4b7dbee8
--- /dev/null
+++ b/songyuxuan-2020300803/Login/app/.gitignore
@@ -0,0 +1 @@
+/build
\ No newline at end of file
diff --git a/songyuxuan-2020300803/Login/app/build.gradle b/songyuxuan-2020300803/Login/app/build.gradle
new file mode 100644
index 0000000000000000000000000000000000000000..b5c06cc6d8e13ef78f6b14e9061427fca82535eb
--- /dev/null
+++ b/songyuxuan-2020300803/Login/app/build.gradle
@@ -0,0 +1,43 @@
+plugins {
+ id 'com.android.application'
+ id 'kotlin-android'
+}
+
+android {
+ compileSdk 31
+
+ defaultConfig {
+ applicationId "com.example.login"
+ minSdk 21
+ targetSdk 31
+ versionCode 1
+ versionName "1.0"
+
+ testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
+ }
+
+ buildTypes {
+ release {
+ minifyEnabled false
+ proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
+ }
+ }
+ compileOptions {
+ sourceCompatibility JavaVersion.VERSION_1_8
+ targetCompatibility JavaVersion.VERSION_1_8
+ }
+ kotlinOptions {
+ jvmTarget = '1.8'
+ }
+}
+
+dependencies {
+
+ implementation 'androidx.core:core-ktx:1.3.2'
+ implementation 'androidx.appcompat:appcompat:1.2.0'
+ implementation 'com.google.android.material:material:1.3.0'
+ implementation 'androidx.constraintlayout:constraintlayout:2.0.4'
+ testImplementation 'junit:junit:4.+'
+ androidTestImplementation 'androidx.test.ext:junit:1.1.2'
+ androidTestImplementation 'androidx.test.espresso:espresso-core:3.3.0'
+}
\ No newline at end of file
diff --git a/songyuxuan-2020300803/Login/app/proguard-rules.pro b/songyuxuan-2020300803/Login/app/proguard-rules.pro
new file mode 100644
index 0000000000000000000000000000000000000000..481bb434814107eb79d7a30b676d344b0df2f8ce
--- /dev/null
+++ b/songyuxuan-2020300803/Login/app/proguard-rules.pro
@@ -0,0 +1,21 @@
+# Add project specific ProGuard rules here.
+# You can control the set of applied configuration files using the
+# proguardFiles setting in build.gradle.
+#
+# For more details, see
+# http://developer.android.com/guide/developing/tools/proguard.html
+
+# If your project uses WebView with JS, uncomment the following
+# and specify the fully qualified class name to the JavaScript interface
+# class:
+#-keepclassmembers class fqcn.of.javascript.interface.for.webview {
+# public *;
+#}
+
+# Uncomment this to preserve the line number information for
+# debugging stack traces.
+#-keepattributes SourceFile,LineNumberTable
+
+# If you keep the line number information, uncomment this to
+# hide the original source file name.
+#-renamesourcefileattribute SourceFile
\ No newline at end of file
diff --git a/songyuxuan-2020300803/Login/app/src/androidTest/java/com/example/login/ExampleInstrumentedTest.kt b/songyuxuan-2020300803/Login/app/src/androidTest/java/com/example/login/ExampleInstrumentedTest.kt
new file mode 100644
index 0000000000000000000000000000000000000000..5fa5230ee43e4901d075e47ec83eeedcac47d2ab
--- /dev/null
+++ b/songyuxuan-2020300803/Login/app/src/androidTest/java/com/example/login/ExampleInstrumentedTest.kt
@@ -0,0 +1,24 @@
+package com.example.login
+
+import androidx.test.platform.app.InstrumentationRegistry
+import androidx.test.ext.junit.runners.AndroidJUnit4
+
+import org.junit.Test
+import org.junit.runner.RunWith
+
+import org.junit.Assert.*
+
+/**
+ * Instrumented test, which will execute on an Android device.
+ *
+ * See [testing documentation](http://d.android.com/tools/testing).
+ */
+@RunWith(AndroidJUnit4::class)
+class ExampleInstrumentedTest {
+ @Test
+ fun useAppContext() {
+ // Context of the app under test.
+ val appContext = InstrumentationRegistry.getInstrumentation().targetContext
+ assertEquals("com.example.login", appContext.packageName)
+ }
+}
\ No newline at end of file
diff --git a/songyuxuan-2020300803/Login/app/src/main/AndroidManifest.xml b/songyuxuan-2020300803/Login/app/src/main/AndroidManifest.xml
new file mode 100644
index 0000000000000000000000000000000000000000..cb2470f0a1e2b113fa4758e047adb4a56ad9420e
--- /dev/null
+++ b/songyuxuan-2020300803/Login/app/src/main/AndroidManifest.xml
@@ -0,0 +1,23 @@
+
+
+
+
+
+
+
+
+
+
+
+
+
+
\ No newline at end of file
diff --git a/songyuxuan-2020300803/Login/app/src/main/java/com/example/login/MainActivity.kt b/songyuxuan-2020300803/Login/app/src/main/java/com/example/login/MainActivity.kt
new file mode 100644
index 0000000000000000000000000000000000000000..535ad1e9249af90f31f778fe875e5de1f206d838
--- /dev/null
+++ b/songyuxuan-2020300803/Login/app/src/main/java/com/example/login/MainActivity.kt
@@ -0,0 +1,11 @@
+package com.example.login
+
+import androidx.appcompat.app.AppCompatActivity
+import android.os.Bundle
+
+class MainActivity : AppCompatActivity() {
+ override fun onCreate(savedInstanceState: Bundle?) {
+ super.onCreate(savedInstanceState)
+ setContentView(R.layout.activity_main)
+ }
+}
\ No newline at end of file
diff --git a/songyuxuan-2020300803/Login/app/src/main/res/drawable-v24/ic_launcher_foreground.xml b/songyuxuan-2020300803/Login/app/src/main/res/drawable-v24/ic_launcher_foreground.xml
new file mode 100644
index 0000000000000000000000000000000000000000..2b068d11462a4b96669193de13a711a3a36220a0
--- /dev/null
+++ b/songyuxuan-2020300803/Login/app/src/main/res/drawable-v24/ic_launcher_foreground.xml
@@ -0,0 +1,30 @@
+
+
+
+
+