时间选择失败

app/src/main/java/com/eacenic/weighttrack/MainActivity.kt

@@ -3,6 +3,7 @@ package com.eacenic.weighttrack
 import android.annotation.SuppressLint
 import android.os.Build
 import android.os.Bundle
+import android.util.Log
 import android.widget.Toast
 import androidx.activity.ComponentActivity
 import androidx.activity.compose.setContent
@@ -25,12 +26,15 @@ import androidx.compose.foundation.lazy.items
 import androidx.compose.foundation.shape.RoundedCornerShape
 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.MaterialTheme
 import androidx.compose.material3.ModalBottomSheet
 import androidx.compose.material3.OutlinedTextField
 import androidx.compose.material3.Surface
 import androidx.compose.material3.Text
+import androidx.compose.material3.rememberDatePickerState
 import androidx.compose.material3.rememberModalBottomSheetState
 import androidx.compose.runtime.Composable
 import androidx.compose.runtime.collectAsState
@@ -50,8 +54,12 @@ import androidx.compose.ui.unit.sp
 import androidx.lifecycle.viewmodel.compose.viewModel
 import com.eacenic.weighttrack.ui.theme.WeightTrackTheme
 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)
@@ -84,6 +92,8 @@ fun WeightTrackLayout(
 
     var openBottomSheet by rememberSaveable { mutableStateOf(false) }
 
+    weightTrackViewModel.loadWeightRecords()
+
     Surface(
         modifier = Modifier.fillMaxSize(),
         color = Color.White
@@ -139,7 +149,7 @@ fun WeightRecordItem(weightRecord: WeightRecord) {
 
 @Composable
 fun CurrentWeight(
-    currentWeight: Float,
+    currentWeight: Float? = null,
     modifier: Modifier = Modifier
 ) {
     Row (
@@ -157,7 +167,7 @@ fun CurrentWeight(
 
         ) {
             Text(
-                text = "$currentWeight",
+                text = "${currentWeight ?: "No Data"}",
                 modifier = Modifier.align(Alignment.Center),
                 fontSize = 80.sp,
                 fontFamily = doodleShadowFontFamily
@@ -206,6 +216,8 @@ fun BottomSheetEditor(
 
     var text by remember { mutableStateOf("") }
     var clickable by remember { mutableStateOf(false) }
+    val datePickerState = rememberDatePickerState()
+
 
     if (expandBottomSheet) {
         ModalBottomSheet(
@@ -239,6 +251,17 @@ fun BottomSheetEditor(
                 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,
@@ -259,7 +282,8 @@ fun BottomSheetEditor(
                     Button(
                         onClick = {
                             Toast.makeText(context, "save weight", Toast.LENGTH_SHORT).show()
-                            weightTrackViewModel.addWeightRecord(WeightRecord(text.toFloat(), LocalDateTime.now()))
+                            Log.e(TAG, "BottomSheetEditor: ${Date(datePickerState.selectedDateMillis!!)}")
+                            weightTrackViewModel.addWeightRecord(WeightRecord(weight = text.toFloat(), date = LocalDateTime.now()))
                             text = ""
                             onDismiss()
                         },
@@ -269,9 +293,8 @@ fun BottomSheetEditor(
 
                     }
                 }
-                Spacer(modifier = Modifier
+
-                    .height(40.dp)
+                Spacer(modifier = Modifier.size(40.dp))
-                    .fillMaxWidth())
             }
         }
     }

app/src/main/java/com/eacenic/weighttrack/WeightRecord.kt

@@ -1,14 +1,35 @@
 package com.eacenic.weighttrack
 
+import android.os.Build
+import androidx.annotation.RequiresApi
+import io.objectbox.annotation.Convert
 import io.objectbox.annotation.Entity
 import io.objectbox.annotation.Id
+import io.objectbox.converter.PropertyConverter
 import java.time.LocalDateTime
+import java.time.format.DateTimeFormatter
 
 @Entity
-data class WeightRecord(
+data class WeightRecord @RequiresApi(Build.VERSION_CODES.O) constructor(
     @Id
     var id: Long = 0,
     var weight: Float,
-    var date: LocalDateTime,
+    @Convert(converter = WeightRecordConverter::class, dbType = String::class)
+    var date: LocalDateTime? = null,
     var isDeleted: Boolean = false
 )
+
+@RequiresApi(Build.VERSION_CODES.O)
+val ymdHmsFormatter: DateTimeFormatter = DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss")
+
+class WeightRecordConverter: PropertyConverter<LocalDateTime?, String?> {
+    @RequiresApi(Build.VERSION_CODES.O)
+    override fun convertToEntityProperty(databaseValue: String?): LocalDateTime {
+           return LocalDateTime.parse(databaseValue, ymdHmsFormatter)
+    }
+
+    @RequiresApi(Build.VERSION_CODES.O)
+    override fun convertToDatabaseValue(entityProperty: LocalDateTime?): String {
+        return entityProperty?.format(ymdHmsFormatter) ?: ""
+    }
+}

app/src/main/java/com/eacenic/weighttrack/WeightTrackApp.kt

@@ -6,6 +6,7 @@ class WeightTrackApp: Application() {
 
     override fun onCreate() {
         super.onCreate()
+        WeightTrackObjectBox.init(this)
     }
 
 }

app/src/main/java/com/eacenic/weighttrack/WeightTrackObjectBox.kt

@@ -0,0 +1,17 @@
+package com.eacenic.weighttrack
+
+import android.content.Context
+import io.objectbox.BoxStore
+
+object WeightTrackObjectBox {
+
+    lateinit var store: BoxStore
+        private set
+
+    fun init(context: Context) {
+        store = MyObjectBox.builder()
+            .androidContext(context.applicationContext)
+            .build()
+    }
+
+}

app/src/main/java/com/eacenic/weighttrack/WeightTrackViewModel.kt

@@ -7,15 +7,16 @@ import androidx.lifecycle.ViewModel
 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(62.6f, LocalDateTime.now()),
+        WeightRecord(weight = 62.6f, date = LocalDateTime.now()),
-        WeightRecord(63.6f, LocalDateTime.now()),
+        WeightRecord(weight = 63.6f, date = LocalDateTime.now()),
-        WeightRecord(65.6f, LocalDateTime.now())
+        WeightRecord(weight = 65.6f, date = LocalDateTime.now())
     ))
 
     @RequiresApi(Build.VERSION_CODES.O)
@@ -23,10 +24,19 @@ class WeightTrackViewModel: ViewModel() {
 
     @RequiresApi(Build.VERSION_CODES.O)
     fun addWeightRecord(newRecord: WeightRecord) {
-        val newRecords = _historyData.value.toMutableList()
+        saveWeightRecord(newRecord)
-        newRecords.add(newRecord)
+        loadWeightRecords()
-        _historyData.value = newRecords
+    }
-        Log.e(TAG, "$newRecord")
+
-        Log.e(TAG, "${_historyData.value}")
+    private val weightBox = WeightTrackObjectBox.store.boxFor(WeightRecord::class.java)
+
+    private fun saveWeightRecord(weightRecord: WeightRecord) {
+        weightBox.put(weightRecord)
+    }
+
+    @RequiresApi(Build.VERSION_CODES.O)
+    fun loadWeightRecords() {
+        val storedData = weightBox.all
+        _historyData.value = storedData
     }
 }