diff --git a/.idea/gradle.xml b/.idea/gradle.xml
index 001e149..4047cc0 100644
--- a/.idea/gradle.xml
+++ b/.idea/gradle.xml
@@ -5,6 +5,7 @@
     <option name="linkedExternalProjectsSettings">
       <GradleProjectSettings>
         <option name="externalProjectPath" value="$PROJECT_DIR$" />
+        <option name="gradleHome" value="/usr/local/Cellar/gradle/8.4/libexec" />
         <option name="gradleJvm" value="17" />
         <option name="modules">
           <set>
diff --git a/app/build.gradle.kts b/app/build.gradle.kts
index f2082fc..778bc4a 100644
--- a/app/build.gradle.kts
+++ b/app/build.gradle.kts
@@ -78,4 +78,7 @@ dependencies {
     // view model
 
     implementation("androidx.lifecycle:lifecycle-viewmodel-compose:2.6.1")
+
+    implementation("com.google.accompanist:accompanist-systemuicontroller:0.27.0")
+
 }
\ No newline at end of file
diff --git a/app/src/main/AndroidManifest.xml b/app/src/main/AndroidManifest.xml
index 408ac84..1b6f7af 100644
--- a/app/src/main/AndroidManifest.xml
+++ b/app/src/main/AndroidManifest.xml
@@ -7,9 +7,8 @@
         android:allowBackup="true"
         android:dataExtractionRules="@xml/data_extraction_rules"
         android:fullBackupContent="@xml/backup_rules"
-        android:icon="@mipmap/ic_launcher"
+        android:icon="@drawable/weight"
         android:label="@string/app_name"
-        android:roundIcon="@mipmap/ic_launcher_round"
         android:supportsRtl="true"
         android:theme="@style/Theme.WeightTrack"
         tools:targetApi="31">
diff --git a/app/src/main/java/com/eacenic/weighttrack/MainActivity.kt b/app/src/main/java/com/eacenic/weighttrack/MainActivity.kt
index 1522c99..10a0ed6 100644
--- a/app/src/main/java/com/eacenic/weighttrack/MainActivity.kt
+++ b/app/src/main/java/com/eacenic/weighttrack/MainActivity.kt
@@ -24,11 +24,15 @@ import androidx.compose.foundation.layout.wrapContentHeight
 import androidx.compose.foundation.lazy.LazyColumn
 import androidx.compose.foundation.lazy.items
 import androidx.compose.foundation.shape.RoundedCornerShape
+import androidx.compose.material.icons.Icons
+import androidx.compose.material.icons.filled.Edit
+import androidx.compose.material.icons.outlined.Edit
 import androidx.compose.material3.Button
 import androidx.compose.material3.ButtonDefaults
 import androidx.compose.material3.DatePicker
-import androidx.compose.material3.DatePickerFormatter
 import androidx.compose.material3.ExperimentalMaterial3Api
+import androidx.compose.material3.Icon
+import androidx.compose.material3.IconButton
 import androidx.compose.material3.MaterialTheme
 import androidx.compose.material3.ModalBottomSheet
 import androidx.compose.material3.OutlinedTextField
@@ -37,6 +41,7 @@ import androidx.compose.material3.Text
 import androidx.compose.material3.rememberDatePickerState
 import androidx.compose.material3.rememberModalBottomSheetState
 import androidx.compose.runtime.Composable
+import androidx.compose.runtime.LaunchedEffect
 import androidx.compose.runtime.collectAsState
 import androidx.compose.runtime.getValue
 import androidx.compose.runtime.mutableStateOf
@@ -48,18 +53,19 @@ import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.draw.clip
 import androidx.compose.ui.graphics.Color
+import androidx.compose.ui.graphics.painter.Painter
 import androidx.compose.ui.platform.LocalContext
 import androidx.compose.ui.unit.dp
 import androidx.compose.ui.unit.sp
 import androidx.lifecycle.viewmodel.compose.viewModel
 import com.eacenic.weighttrack.ui.theme.WeightTrackTheme
+import com.google.accompanist.systemuicontroller.rememberSystemUiController
 import kotlinx.coroutines.launch
 import java.time.Instant
 import java.time.LocalDateTime
 import java.time.ZoneId
 import java.time.ZoneOffset
 import java.time.format.DateTimeFormatter
-import java.util.Date
 
 class MainActivity : ComponentActivity() {
     @RequiresApi(Build.VERSION_CODES.O)
@@ -88,9 +94,18 @@ private val dateTimeFormatter = DateTimeFormatter.ofPattern("yyyy-MM-dd");
 fun WeightTrackLayout(
     weightTrackViewModel: WeightTrackViewModel = viewModel()
 ) {
+
+    val systemUIController = rememberSystemUiController()
+
+    LaunchedEffect(Unit) {
+        systemUIController.setStatusBarColor(Color(0xFF424242))
+    }
+
     val weightRecords by weightTrackViewModel.historyData.collectAsState()
+    val newestRecord by weightTrackViewModel.newestRecord.collectAsState()
 
     var openBottomSheet by rememberSaveable { mutableStateOf(false) }
+    var curRecord by rememberSaveable { mutableStateOf<WeightRecord?>(null) }
 
     weightTrackViewModel.loadWeightRecords()
 
@@ -101,58 +116,77 @@ fun WeightTrackLayout(
         Column(
             modifier = Modifier.padding(horizontal = 20.dp)
         ) {
-            CurrentWeight(62.6f, Modifier.padding(top = 20.dp))
+            CurrentWeight(newestRecord, Modifier.padding(top = 20.dp))
             LazyColumn(
                 modifier = Modifier.fillMaxHeight(0.9f)
             ) {
-                this.items(weightRecords) {
+                this.items(weightRecords) { it ->
 //                    Text(text = "${it.weight}")
-                    WeightRecordItem(weightRecord = it)
+                    WeightRecordItem(
+                        weightRecord = it,
+                        onClickEdit = { record ->
+                            curRecord = record
+                            openBottomSheet = true
+                        }
+                    )
                 }
             }
             EditButton(onClick = { openBottomSheet = true })
         }
 
-        BottomSheetEditor(
-            expandBottomSheet = openBottomSheet,
-            onDismiss = {
-                openBottomSheet = false
-            }
-        )
+        if (openBottomSheet) {
+            BottomSheetEditor(
+                onDismiss = {
+                    openBottomSheet = false
+                    curRecord = null
+                },
+                curRecord = curRecord
+            )
+        }
 
     }
 }
 
 @RequiresApi(Build.VERSION_CODES.O)
 @Composable
-fun WeightRecordItem(weightRecord: WeightRecord) {
-    Box(
+fun WeightRecordItem(
+    weightRecord: WeightRecord,
+    onClickEdit: (curRecord: WeightRecord) -> Unit
+) {
+    Row(
         modifier = Modifier
             .fillMaxWidth()
             .wrapContentHeight()
-            .padding(vertical = 5.dp)
+            .padding(vertical = 5.dp),
+        verticalAlignment = Alignment.CenterVertically
     ) {
         Text(
             text = "${weightRecord.weight}",
-            modifier = Modifier.align(Alignment.CenterStart),
             fontFamily = doodleShadowFontFamily,
             fontSize = 36.sp,
+            modifier = Modifier.weight(1f)
         )
         Text(
             text = dateTimeFormatter.format(weightRecord.date),
-            modifier = Modifier.align(Alignment.CenterEnd),
             fontFamily = doodleShadowFontFamily,
-            fontSize = 18.sp
+            fontSize = 18.sp,
+            modifier = Modifier.padding(end = 20.dp)
         )
+        IconButton(
+            onClick = { onClickEdit(weightRecord) },
+            modifier = Modifier.padding(horizontal = 5.dp)
+        ) {
+            Icon(Icons.Filled.Edit, contentDescription = "edit")
+        }
     }
 }
 
 @Composable
 fun CurrentWeight(
-    currentWeight: Float? = null,
+    curRecord: WeightRecord? = null,
     modifier: Modifier = Modifier
 ) {
-    Row (
+    Row(
         modifier = modifier
             .wrapContentHeight()
             .fillMaxWidth(),
@@ -163,13 +197,14 @@ fun CurrentWeight(
                 .fillMaxWidth()
                 .height(120.dp)
                 .clip(RoundedCornerShape(10.dp))
-                .background(Color.Cyan)
+                .background(Color(0xFF424242))
 
         ) {
             Text(
-                text = "${currentWeight ?: "No Data"}",
+                text = "${curRecord?.weight ?: "No Data"}",
                 modifier = Modifier.align(Alignment.Center),
                 fontSize = 80.sp,
+                color = Color.White,
                 fontFamily = doodleShadowFontFamily
             )
         }
@@ -192,10 +227,15 @@ fun EditButton(
                 .height(48.dp)
                 .fillMaxWidth(),
             shape = RoundedCornerShape(5.dp),
-            colors = ButtonDefaults.buttonColors(Color.Cyan),
+            colors = ButtonDefaults.buttonColors(Color(0xFF424242)),
             onClick = onClick,
         ) {
-            Text(text = "ADD", color = Color.Black, fontSize = 36.sp, fontFamily = doodleShadowFontFamily)
+            Text(
+                text = "ADD",
+                color = Color.White,
+                fontSize = 36.sp,
+                fontFamily = doodleShadowFontFamily
+            )
         }
     }
 }
@@ -204,98 +244,116 @@ fun EditButton(
 @OptIn(ExperimentalMaterial3Api::class)
 @Composable
 fun BottomSheetEditor(
-    expandBottomSheet: Boolean = false,
     onDismiss: () -> Unit,
-    weightTrackViewModel: WeightTrackViewModel = viewModel()
+    weightTrackViewModel: WeightTrackViewModel = viewModel(),
+    curRecord: WeightRecord? = null
 ) {
     val context = LocalContext.current
-
     val scope = rememberCoroutineScope()
 
     val bottomSheetState = rememberModalBottomSheetState(skipPartiallyExpanded = true)
 
-    var text by remember { mutableStateOf("") }
-    var clickable by remember { mutableStateOf(false) }
-    val datePickerState = rememberDatePickerState()
+    var text by remember { mutableStateOf("${curRecord?.weight ?: ""}") }
+    var clickable = text.isNotEmpty()
 
 
-    if (expandBottomSheet) {
-        ModalBottomSheet(
-            onDismissRequest = onDismiss,
-            sheetState = bottomSheetState
+    val datePickerState = rememberDatePickerState(
+        initialSelectedDateMillis = curRecord?.date?.toInstant(ZoneOffset.UTC)?.toEpochMilli()
+    )
+
+    ModalBottomSheet(
+        onDismissRequest = onDismiss,
+        sheetState = bottomSheetState
+    ) {
+        Column(
+            modifier = Modifier
+                .wrapContentHeight()
+                .fillMaxWidth()
         ) {
-            Column(
+            Row(
                 modifier = Modifier
-                    .wrapContentHeight()
                     .fillMaxWidth()
+                    .padding(horizontal = 20.dp)
             ) {
-                Row(
-                    modifier = Modifier
-                        .fillMaxWidth()
-                        .padding(horizontal = 20.dp)
-                ) {
-                    OutlinedTextField(
-                        value = text,
-                        modifier = Modifier.fillMaxWidth(),
-                        onValueChange = {
-                            val newVal = it.toFloatOrNull()
-                            if ((it.isNotEmpty() && newVal == null) || (newVal !=null && newVal > 1000f)) {
-                                Toast.makeText(context, "只能输入数字，且要求数字小于1000", Toast.LENGTH_SHORT).show()
-                                return@OutlinedTextField
-                            }
-                            text = it
-                            clickable = text.isNotEmpty()
-                        },
-                    )
-                }
-                Spacer(modifier = Modifier
+                OutlinedTextField(
+                    value = text,
+                    modifier = Modifier.fillMaxWidth(),
+                    onValueChange = {
+                        val newVal = it.toFloatOrNull()
+                        if ((it.isNotEmpty() && newVal == null) || (newVal != null && newVal > 1000f)) {
+                            Toast.makeText(
+                                context,
+                                "只能输入数字，且要求数字小于1000",
+                                Toast.LENGTH_SHORT
+                            ).show()
+                            return@OutlinedTextField
+                        }
+                        if (it.length > 6) {
+                            Toast.makeText(
+                                context,
+                                "数字长度不能超过6位",
+                                Toast.LENGTH_SHORT
+                            ).show()
+                            return@OutlinedTextField
+                        }
+                        text = it
+                        clickable = text.isNotEmpty()
+                    },
+                )
+            }
+            Spacer(
+                modifier = Modifier
                     .height(20.dp)
-                    .fillMaxWidth())
-                
-                Row(
-                    modifier = Modifier.fillMaxWidth()
-                ) {
-                    DatePicker(
-                        state = datePickerState,
-                        modifier = Modifier.padding(16.dp),
-                        title = { Text(text="称重日期") },
-                    )
-                }
-                
-                Row(
-                    horizontalArrangement = Arrangement.Center,
-                    verticalAlignment = Alignment.CenterVertically,
-                    modifier = Modifier.fillMaxWidth()
-                ) {
-                    Button(
-                        onClick = {
-                            scope.launch { bottomSheetState.hide() }.invokeOnCompletion {
-                                if (!bottomSheetState.isVisible) {
-                                    onDismiss()
-                                }
+                    .fillMaxWidth()
+            )
+
+            Row(
+                modifier = Modifier.fillMaxWidth()
+            ) {
+                DatePicker(
+                    state = datePickerState,
+                    modifier = Modifier.padding(16.dp),
+                    title = { Text(text = "称重日期") },
+                )
+            }
+
+            Row(
+                horizontalArrangement = Arrangement.Center,
+                verticalAlignment = Alignment.CenterVertically,
+                modifier = Modifier.fillMaxWidth()
+            ) {
+                Button(
+                    onClick = {
+                        scope.launch { bottomSheetState.hide() }.invokeOnCompletion {
+                            if (!bottomSheetState.isVisible) {
+                                onDismiss()
                             }
                         }
-                    ) {
-                        Text(text = "CANCEL", fontSize = 18.sp, fontFamily = doodleShadowFontFamily)
-                    }
-                    Spacer(modifier = Modifier.size(60.dp))
-                    Button(
-                        onClick = {
-                            Toast.makeText(context, "save weight", Toast.LENGTH_SHORT).show()
-                            Log.e(TAG, "BottomSheetEditor: ${Date(datePickerState.selectedDateMillis!!)}")
-                            weightTrackViewModel.addWeightRecord(WeightRecord(weight = text.toFloat(), date = LocalDateTime.now()))
-                            text = ""
-                            onDismiss()
-                        },
-                        enabled = clickable
-                    ) {
-                        Text(text = "CONFIRM", fontSize = 18.sp, fontFamily = doodleShadowFontFamily)
-
                     }
+                ) {
+                    Text(text = "CANCEL", fontSize = 18.sp, fontFamily = doodleShadowFontFamily)
                 }
+                Spacer(modifier = Modifier.size(60.dp))
+                Button(
+                    onClick = {
+                        val newDate = LocalDateTime.ofInstant(
+                            Instant.ofEpochMilli(datePickerState.selectedDateMillis!!),
+                            ZoneId.systemDefault()
+                        )
+                        val newRecord = curRecord?.copy(weight = text.toFloat(), date = newDate)
+                            ?: WeightRecord(weight = text.toFloat(), date = newDate)
+                        weightTrackViewModel.addWeightRecord(newRecord)
+                        text = ""
+                        onDismiss()
+                    },
+                    enabled = clickable
+                ) {
+                    Text(text = "CONFIRM", fontSize = 18.sp, fontFamily = doodleShadowFontFamily)
 
-                Spacer(modifier = Modifier.size(40.dp))
+                }
             }
+
+            Spacer(modifier = Modifier.size(40.dp))
         }
     }
 
diff --git a/app/src/main/java/com/eacenic/weighttrack/WeightTrackViewModel.kt b/app/src/main/java/com/eacenic/weighttrack/WeightTrackViewModel.kt
index dfe4484..a3b94fe 100644
--- a/app/src/main/java/com/eacenic/weighttrack/WeightTrackViewModel.kt
+++ b/app/src/main/java/com/eacenic/weighttrack/WeightTrackViewModel.kt
@@ -1,34 +1,31 @@
 package com.eacenic.weighttrack
 
 import android.os.Build
-import android.util.Log
 import androidx.annotation.RequiresApi
 import androidx.lifecycle.ViewModel
+import io.objectbox.kotlin.boxFor
 import kotlinx.coroutines.flow.MutableStateFlow
 import kotlinx.coroutines.flow.StateFlow
 import java.time.LocalDateTime
-import java.util.Arrays
 
 const val TAG = "WeightTrackViewModel"
 class WeightTrackViewModel: ViewModel() {
 
     @RequiresApi(Build.VERSION_CODES.O)
-    private var _historyData = MutableStateFlow<List<WeightRecord>>(mutableListOf<WeightRecord>(
-        WeightRecord(weight = 62.6f, date = LocalDateTime.now()),
-        WeightRecord(weight = 63.6f, date = LocalDateTime.now()),
-        WeightRecord(weight = 65.6f, date = LocalDateTime.now())
-    ))
-
+    private var _historyData = MutableStateFlow<List<WeightRecord>>(mutableListOf<WeightRecord>())
     @RequiresApi(Build.VERSION_CODES.O)
     val historyData: StateFlow<List<WeightRecord>> = _historyData
 
+    private var _curRecord = MutableStateFlow<WeightRecord?>(null)
+    val newestRecord = _curRecord
+
     @RequiresApi(Build.VERSION_CODES.O)
     fun addWeightRecord(newRecord: WeightRecord) {
         saveWeightRecord(newRecord)
         loadWeightRecords()
     }
 
-    private val weightBox = WeightTrackObjectBox.store.boxFor(WeightRecord::class.java)
+    private val weightBox = WeightTrackObjectBox.store.boxFor(WeightRecord::class)
 
     private fun saveWeightRecord(weightRecord: WeightRecord) {
         weightBox.put(weightRecord)
@@ -37,6 +34,10 @@ class WeightTrackViewModel: ViewModel() {
     @RequiresApi(Build.VERSION_CODES.O)
     fun loadWeightRecords() {
         val storedData = weightBox.all
+        storedData.sortByDescending { it.date }
         _historyData.value = storedData
+        if (storedData.isNotEmpty()) {
+            _curRecord.value = storedData[0]
+        }
     }
 }
\ No newline at end of file
diff --git a/app/src/main/res/drawable/weight.xml b/app/src/main/res/drawable/weight.xml
new file mode 100644
index 0000000..bdb87c4
--- /dev/null
+++ b/app/src/main/res/drawable/weight.xml
@@ -0,0 +1,26 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="297dp"
+    android:height="210dp"
+    android:viewportWidth="297"
+    android:viewportHeight="210">
+  <path
+      android:pathData="M21.15,51.45L21.15,51.45A24.41,14.3 90,0 1,35.44 75.85L35.44,133.96A24.41,14.3 90,0 1,21.15 158.37L21.15,158.37A24.41,14.3 90,0 1,6.85 133.96L6.85,75.85A24.41,14.3 90,0 1,21.15 51.45z"
+      android:strokeWidth="0.59"
+      android:fillColor="#000000"/>
+  <path
+      android:pathData="M115.64,88.33l63.41,0l0,33.15l-63.41,0z"
+      android:strokeWidth="0.49"
+      android:fillColor="#000000"/>
+  <path
+      android:pathData="m76.68,15.39c-22.04,0 -39.78,18.23 -39.78,40.87l0,97.3c0,22.64 17.74,40.87 39.78,40.87 22.04,0 39.78,-18.23 39.78,-40.87L116.46,56.26c0,-22.64 -17.74,-40.87 -39.78,-40.87zM76.68,52.69c7.35,0 13.26,10.63 13.26,23.84l0,56.76c0,13.21 -5.92,23.84 -13.26,23.84 -7.35,0 -13.26,-10.63 -13.26,-23.84L63.42,76.53c0,-13.21 5.91,-23.84 13.26,-23.84z"
+      android:strokeWidth="1.28"
+      android:fillColor="#666666"/>
+  <path
+      android:pathData="m218.41,15.39c-22.04,0 -39.78,18.23 -39.78,40.87l0,97.3c0,22.64 17.74,40.87 39.78,40.87 22.04,0 39.78,-18.23 39.78,-40.87L258.2,56.26c0,-22.64 -17.74,-40.87 -39.78,-40.87zM218.41,52.69c7.35,0 13.26,10.63 13.26,23.84l0,56.76c0,13.21 -5.92,23.84 -13.26,23.84 -7.35,0 -13.26,-10.63 -13.26,-23.84L205.15,76.53c0,-13.21 5.91,-23.84 13.26,-23.84z"
+      android:strokeWidth="1.28"
+      android:fillColor="#666666"/>
+  <path
+      android:pathData="M274.77,51.45L274.77,51.45A24.41,14.3 90,0 1,289.07 75.85L289.07,133.96A24.41,14.3 90,0 1,274.77 158.37L274.77,158.37A24.41,14.3 90,0 1,260.48 133.96L260.48,75.85A24.41,14.3 90,0 1,274.77 51.45z"
+      android:strokeWidth="0.59"
+      android:fillColor="#000000"/>
+</vector>
diff --git a/app/src/main/res/mipmap-anydpi-v26/weight.png b/app/src/main/res/mipmap-anydpi-v26/weight.png
new file mode 100644
index 0000000..984f143
Binary files /dev/null and b/app/src/main/res/mipmap-anydpi-v26/weight.png differ