Implemented rudimentary batteries listing.

app/src/main/java/com/sockenklaus/batterytracker/ui/fragments/add_battery/AddBatteryFragment.kt

@@ -40,7 +40,7 @@ class AddBatteryFragment : Fragment() {
 
         val model = ViewModelProvider(this)[AddBatteryViewModel::class.java]
 
-        var batteries = emptyList<Battery>()
+        var batteries by mutableStateOf(emptyList<Battery>())
 
         model.batteries.observe(viewLifecycleOwner) {
             batteries = it

app/src/main/java/com/sockenklaus/batterytracker/ui/fragments/add_charge/AddChargeFragment.kt

@@ -49,7 +49,7 @@ class AddChargeFragment : Fragment() {
     ): View {
 
         model = ViewModelProvider(this)[AddChargeViewModel::class.java]
-        var batteries = emptyList<Battery>()
+        var batteries by mutableStateOf(emptyList<Battery>())
 
         model.batteries.observe(this.viewLifecycleOwner){
             batteries = it

app/src/main/java/com/sockenklaus/batterytracker/ui/fragments/home/HomeFragment.kt

@@ -4,29 +4,80 @@ import android.os.Bundle
 import android.view.LayoutInflater
 import android.view.View
 import android.view.ViewGroup
-import android.widget.TextView
+import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.padding
+import androidx.compose.foundation.lazy.LazyColumn
+import androidx.compose.foundation.lazy.LazyListState
+import androidx.compose.foundation.lazy.items
+import androidx.compose.material.*
+import androidx.compose.runtime.getValue
+import androidx.compose.runtime.mutableStateOf
+import androidx.compose.runtime.remember
+import androidx.compose.runtime.setValue
+import androidx.compose.ui.Modifier
 import androidx.compose.ui.platform.ComposeView
 import androidx.compose.ui.platform.ViewCompositionStrategy
+import androidx.compose.ui.unit.dp
 import androidx.fragment.app.Fragment
-import androidx.lifecycle.ViewModelProvider
+import androidx.lifecycle.viewmodel.compose.viewModel
+import com.sockenklaus.batterytracker.R
+import com.sockenklaus.batterytracker.room.entities.Battery
+import com.sockenklaus.batterytracker.ui.composables.MyOutlinedTextFieldWithSuffix
 import com.sockenklaus.batterytracker.ui.theme.BatteryTrackerTheme
 
 class HomeFragment : Fragment() {
 
+    @OptIn(ExperimentalMaterialApi::class)
     override fun onCreateView(
         inflater: LayoutInflater,
         container: ViewGroup?,
         savedInstanceState: Bundle?
     ): View {
 
-        val model = ViewModelProvider(this)[HomeViewModel::class.java]
-
         return ComposeView(requireContext()).apply {
             setViewCompositionStrategy(ViewCompositionStrategy.DisposeOnViewTreeLifecycleDestroyed)
-            
-            setContent { 
+
+            setContent {
                 BatteryTrackerTheme() {
-                    
+                    val model: HomeViewModel = viewModel()
+                    var batteries by remember { mutableStateOf(emptyList<Battery>()) }
+                    var filterText by remember { mutableStateOf("")}
+
+                    model.batteries.observe(viewLifecycleOwner) {
+                        batteries = it
+                    }
+
+                    val filteredList = batteries.filter { it.name.contains(filterText, ignoreCase = true) }
+                    val modHorizontalPadding = Modifier.padding(horizontal = 16.dp)
+
+                    Column {
+                        MyOutlinedTextFieldWithSuffix(
+                            value = filterText,
+                            onValueChange = { filterText = it },
+                            labelId = R.string.hint_filter_batteries,
+                            modifier = Modifier.padding(
+                                start = 16.dp,
+                                end = 16.dp,
+                                top = 16.dp
+                            )
+                        )
+
+                        LazyColumn(
+                            state = LazyListState()
+                        ) {
+                            items(filteredList){ battery ->
+                                ListItem(
+                                    text = { Text(battery.name) },
+                                    secondaryText = {
+                                        if(battery.declaredCapacity != null){
+                                            Text("Capacity: ${battery.declaredCapacity} Ah")
+                                        }
+                                    }
+                                )
+                                Divider(modHorizontalPadding)
+                            }
+                        }
+                    }
                 }
             }
         }

app/src/main/java/com/sockenklaus/batterytracker/ui/fragments/home/HomeViewModel.kt

@@ -1,15 +1,11 @@
 package com.sockenklaus.batterytracker.ui.fragments.home
 
 import android.app.Application
-import androidx.lifecycle.AndroidViewModel
-import androidx.lifecycle.LiveData
-import androidx.lifecycle.MutableLiveData
-import androidx.lifecycle.ViewModel
+import androidx.lifecycle.*
+import com.sockenklaus.batterytracker.room.BatteryTrackerDB
 
 class HomeViewModel(application: Application) : AndroidViewModel(application) {
 
-    private val _text = MutableLiveData<String>().apply {
-        value = "This is home Fragment"
-    }
-    val text: LiveData<String> = _text
+    private val db = BatteryTrackerDB.getInstance(application)
+    val batteries = db.batteryDao().getBatteries().asLiveData()
 }

app/src/main/res/values/strings.xml

@@ -30,4 +30,5 @@
     <string name="helper_required">* Required</string>
     <string name="helper_battery_not_unique">Battery-Name not unique!</string>
     <string name="helper_battery_not_found">Battery not found</string>
+    <string name="hint_filter_batteries">Filter Batteries…</string>
 </resources>