diff --git a/app/build.gradle.kts b/app/build.gradle.kts
index 896dcab..d304e7f 100644
--- a/app/build.gradle.kts
+++ b/app/build.gradle.kts
@@ -53,6 +53,8 @@ dependencies {
     implementation(libs.constraintlayout)
     implementation(libs.room.runtime)
     implementation(platform(libs.compose.bom))
+    implementation(platform(libs.compose.bom))
+    androidTestImplementation(platform(libs.compose.bom))
     androidTestImplementation(platform(libs.compose.bom))
     ksp(libs.room.compiler)
     implementation(libs.room.ktx)
diff --git a/app/src/main/AndroidManifest.xml b/app/src/main/AndroidManifest.xml
index c74dc0e..0554bb9 100644
--- a/app/src/main/AndroidManifest.xml
+++ b/app/src/main/AndroidManifest.xml
@@ -18,11 +18,16 @@
         android:supportsRtl="true"
         android:theme="@style/Theme.MiFreeform"
         tools:targetApi="31">
+        <activity
+            android:name=".ui.app_list.FreeformAppActivity"
+            android:exported="false"
+            android:label="@string/title_activity_freeform_app"
+            android:theme="@style/Theme.MiFreeform" />
         <activity
             android:name=".ui.app_list.AppListActivity"
             android:exported="true"
-            android:taskAffinity=":applist"
             android:label="@string/title_activity_app_list"
+            android:taskAffinity=":applist"
             android:theme="@style/Theme.MiFreeform" />
         <activity
             android:name=".ui.floating.FloatingActivity"
diff --git a/app/src/main/java/com/sunshine/freeform/MiFreeformServiceManager.kt b/app/src/main/java/com/sunshine/freeform/MiFreeformServiceManager.kt
index ab642c7..0488e8e 100644
--- a/app/src/main/java/com/sunshine/freeform/MiFreeformServiceManager.kt
+++ b/app/src/main/java/com/sunshine/freeform/MiFreeformServiceManager.kt
@@ -38,12 +38,13 @@ object MiFreeformServiceManager {
     }
 
     fun createDisplay(componentName: ComponentName, userId: Int, width: Int, height: Int, densityDpi: Int) {
+        Log.i(TAG, "$width $height $densityDpi")
         iMiFreeformService?.startAppInFreeform(
             componentName,
             userId,
-            1000,
-            1400,
-            320,
+            width,
+            height,
+            densityDpi,
             120.0f,
             true,
             true,
diff --git a/app/src/main/java/com/sunshine/freeform/ui/app_list/AppListActivity.kt b/app/src/main/java/com/sunshine/freeform/ui/app_list/AppListActivity.kt
index ed0eaa7..a720b15 100644
--- a/app/src/main/java/com/sunshine/freeform/ui/app_list/AppListActivity.kt
+++ b/app/src/main/java/com/sunshine/freeform/ui/app_list/AppListActivity.kt
@@ -137,8 +137,10 @@ fun AppListItem(appInfo: AppInfo, viewModel: AppListViewModel) {
                 MiFreeformServiceManager.createDisplay(
                     appInfo.componentName,
                     appInfo.userId,
-                    viewModel.getIntSp("freeform_width", (viewModel.screenWidth * 0.8).roundToInt()),
-                    viewModel.getIntSp("freeform_height", (viewModel.screenHeight * 0.5).roundToInt()),
+                    // I think AppListActivity must open in Freeform.
+                    // So this `screen` is Freeform. I do not need scale. 0.8x 0.5x
+                    viewModel.getIntSp("freeform_width", viewModel.screenWidth),
+                    viewModel.getIntSp("freeform_height", viewModel.screenHeight),
                     viewModel.getIntSp("freeform_dpi", viewModel.screenDensityDpi),
                 )
                 viewModel.closeActivity()
diff --git a/app/src/main/java/com/sunshine/freeform/ui/app_list/FreeformAppActivity.kt b/app/src/main/java/com/sunshine/freeform/ui/app_list/FreeformAppActivity.kt
new file mode 100644
index 0000000..24d6225
--- /dev/null
+++ b/app/src/main/java/com/sunshine/freeform/ui/app_list/FreeformAppActivity.kt
@@ -0,0 +1,67 @@
+package com.sunshine.freeform.ui.app_list
+
+import android.os.Bundle
+import androidx.activity.ComponentActivity
+import androidx.activity.compose.setContent
+import androidx.compose.foundation.layout.Box
+import androidx.compose.foundation.layout.WindowInsets
+import androidx.compose.foundation.layout.fillMaxSize
+import androidx.compose.foundation.layout.padding
+import androidx.compose.material3.ExperimentalMaterial3Api
+import androidx.compose.material3.MaterialTheme
+import androidx.compose.material3.Scaffold
+import androidx.compose.material3.Surface
+import androidx.compose.material3.Text
+import androidx.compose.material3.TopAppBar
+import androidx.compose.runtime.Composable
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.res.stringResource
+import androidx.compose.ui.unit.dp
+import androidx.core.view.WindowCompat
+import com.sunshine.freeform.R
+import com.sunshine.freeform.ui.theme.MiFreeformTheme
+
+class FreeformAppActivity : ComponentActivity() {
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+
+        WindowCompat.setDecorFitsSystemWindows(window, false)
+        val viewModel = AppListViewModel(application)
+
+        setContent {
+            MiFreeformTheme {
+                Surface(
+                    modifier = Modifier.fillMaxSize(),
+                    color = MaterialTheme.colorScheme.background
+                ) {
+                    ScaffoldWidget(viewModel)
+                }
+            }
+        }
+    }
+}
+
+@OptIn(ExperimentalMaterial3Api::class)
+@Composable
+fun ScaffoldWidget(viewModel: AppListViewModel) {
+    Scaffold(
+        topBar = {
+            TopBarWidget()
+        },
+        contentWindowInsets = WindowInsets(0.dp, 0.dp, 0.dp, 0.dp)
+    ) {
+        Box(modifier = Modifier.padding(it)) {
+
+        }
+    }
+}
+
+@OptIn(ExperimentalMaterial3Api::class)
+@Composable
+fun TopBarWidget() {
+    TopAppBar(
+        title = {
+            Text(text = stringResource(id = R.string.title_activity_freeform_app))
+        },
+    )
+}
\ No newline at end of file
diff --git a/app/src/main/java/com/sunshine/freeform/ui/floating/ChooseAppFloatingAdapter.kt b/app/src/main/java/com/sunshine/freeform/ui/floating/ChooseAppFloatingAdapter.kt
index 3e26ca1..d54cea4 100644
--- a/app/src/main/java/com/sunshine/freeform/ui/floating/ChooseAppFloatingAdapter.kt
+++ b/app/src/main/java/com/sunshine/freeform/ui/floating/ChooseAppFloatingAdapter.kt
@@ -21,6 +21,7 @@ import com.bumptech.glide.load.resource.drawable.DrawableTransitionOptions
 import com.sunshine.freeform.MiFreeformServiceManager
 import com.sunshine.freeform.R
 import com.sunshine.freeform.room.FreeFormAppsEntity
+import com.sunshine.freeform.ui.app_list.FreeformAppActivity
 import kotlin.math.roundToInt
 
 /**
@@ -88,7 +89,13 @@ class ChooseAppFloatingAdapter(
                 holder.icon.setImageResource(R.drawable.ic_add)
                 holder.appName.text = context.getString(R.string.edit_apps)
                 holder.click.setOnClickListener {
-                    //context.startActivity(Intent(context, ChooseAppsActivity::class.java).apply { addFlags(Intent.FLAG_ACTIVITY_NEW_TASK) })
+                    MiFreeformServiceManager.createDisplay(
+                        ComponentName("com.sunshine.freeform", "com.sunshine.freeform.ui.app_list.FreeformAppActivity"),
+                        0,
+                        viewModel.getIntSp("freeform_width", (viewModel.screenWidth * 0.8).roundToInt()),
+                        viewModel.getIntSp("freeform_height", (viewModel.screenHeight * 0.5).roundToInt()),
+                        viewModel.getIntSp("freeform_dpi", viewModel.screenDensityDpi),
+                    )
                     callback.onClick()
                 }
             }
diff --git a/app/src/main/java/com/sunshine/freeform/ui/floating/FloatingViewModel.kt b/app/src/main/java/com/sunshine/freeform/ui/floating/FloatingViewModel.kt
index 4b7d86e..0b475dd 100644
--- a/app/src/main/java/com/sunshine/freeform/ui/floating/FloatingViewModel.kt
+++ b/app/src/main/java/com/sunshine/freeform/ui/floating/FloatingViewModel.kt
@@ -28,6 +28,7 @@ class FloatingViewModel(context: Context) {
     }
 
     fun getIntSp(name: String, defaultValue: Int): Int {
+        if (sp.contains(name).not()) sp.edit().putInt(name, defaultValue).apply()
         return sp.getInt(name, defaultValue)
     }
 }
\ No newline at end of file
diff --git a/app/src/main/res/values-zh-rCN/strings.xml b/app/src/main/res/values-zh-rCN/strings.xml
index 61d6996..da87cef 100644
--- a/app/src/main/res/values-zh-rCN/strings.xml
+++ b/app/src/main/res/values-zh-rCN/strings.xml
@@ -16,4 +16,5 @@
     <string name="freeform_height">小窗高度</string>
     <string name="freeform_dpi">小窗分辨率</string>
     <string name="freeform_width_height_warn">小窗高度必须大于宽度</string>
+    <string name="title_activity_freeform_app">选择小窗应用</string>
 </resources>
\ No newline at end of file
diff --git a/app/src/main/res/values/strings.xml b/app/src/main/res/values/strings.xml
index 96ee705..7b77427 100644
--- a/app/src/main/res/values/strings.xml
+++ b/app/src/main/res/values/strings.xml
@@ -25,4 +25,7 @@
     <string name="freeform_height">Freeform Height</string>
     <string name="freeform_dpi">Freeform DPI</string>
     <string name="freeform_width_height_warn">Freeform`s height must bigger than width</string>
+
+<!--FreeformAppActivity-->
+    <string name="title_activity_freeform_app">Choose Freeform App</string>
 </resources>
\ No newline at end of file
diff --git a/gradle/wrapper/gradle-wrapper.properties b/gradle/wrapper/gradle-wrapper.properties
index e1ccbb5..6ea3689 100644
--- a/gradle/wrapper/gradle-wrapper.properties
+++ b/gradle/wrapper/gradle-wrapper.properties
@@ -1,6 +1,6 @@
-#Tue Aug 01 16:03:44 CST 2023
+#Mon Aug 28 17:33:47 CST 2023
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-8.2.1-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-8.1.1-bin.zip
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists