done

.idea/vcs.xml

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="VcsDirectoryMappings">
+    <mapping directory="$PROJECT_DIR$" vcs="Git" />
+  </component>
+</project>

app/src/main/java/id/ajikamaludin/wallet/data/Transaction.kt

@@ -3,8 +3,6 @@ package id.ajikamaludin.wallet.data
 import androidx.room.ColumnInfo
 import androidx.room.Entity
 import androidx.room.PrimaryKey
-import java.text.NumberFormat
-
 
 @Entity(tableName = "transactions")
 data class Transaction(
@@ -18,6 +16,4 @@ data class Transaction(
     val type: Int,
     @ColumnInfo(name = "created_at", defaultValue = "CURRENT_TIMESTAMP")
     val createdAt: String,
-) {
-    fun getFormattedAmount(): String = NumberFormat.getCurrencyInstance().format(amount)
-}
+)

app/src/main/java/id/ajikamaludin/wallet/database/TransactionDao.kt

@@ -1,6 +1,5 @@
 package id.ajikamaludin.wallet.database
 
-import android.content.ClipData
 import androidx.room.*
 import id.ajikamaludin.wallet.ITEM_EXPENSE
 import id.ajikamaludin.wallet.ITEM_INCOME
@@ -28,4 +27,7 @@ interface TransactionDao {
     @Query("SELECT SUM(amount) FROM transactions WHERE type = $ITEM_EXPENSE")
     fun getTotalExpense(): Flow<String>
 
+    @Query("SELECT * FROM transactions WHERE id = :id")
+    fun getTransaction(id: Long): Flow<Transaction>
+
 }

app/src/main/java/id/ajikamaludin/wallet/ui/AddTransactionFragment.kt

@@ -1,18 +1,24 @@
 package id.ajikamaludin.wallet.ui
 
+import android.content.Context
 import android.os.Bundle
 import androidx.fragment.app.Fragment
 import android.view.LayoutInflater
 import android.view.View
 import android.view.ViewGroup
+import android.view.inputmethod.InputMethodManager
 import android.widget.ArrayAdapter
-import android.widget.AutoCompleteTextView
+import android.widget.TextView
 import androidx.fragment.app.activityViewModels
-import com.google.android.material.snackbar.Snackbar
+import androidx.navigation.fragment.findNavController
+import androidx.navigation.fragment.navArgs
+import com.google.android.material.dialog.MaterialAlertDialogBuilder
+import id.ajikamaludin.wallet.ITEM_EXPENSE
+import id.ajikamaludin.wallet.ITEM_INCOME
 import id.ajikamaludin.wallet.R
 import id.ajikamaludin.wallet.WalletApplication
+import id.ajikamaludin.wallet.data.Transaction
 import id.ajikamaludin.wallet.databinding.FragmentAddTransactionBinding
-import id.ajikamaludin.wallet.databinding.FragmentTransactionListBinding
 
 
 class AddTransactionFragment : Fragment() {
@@ -24,6 +30,9 @@ class AddTransactionFragment : Fragment() {
     private var _binding: FragmentAddTransactionBinding? = null
     private val binding get() = _binding!!
 
+    lateinit var transaction: Transaction
+    private val navigationArgs: AddTransactionFragmentArgs by navArgs()
+
     override fun onCreateView(
         inflater: LayoutInflater, container: ViewGroup?,
         savedInstanceState: Bundle?
@@ -35,13 +44,118 @@ class AddTransactionFragment : Fragment() {
 
     override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
         super.onViewCreated(view, savedInstanceState)
+
+        // force select list
         val items = listOf(getString(R.string.income), getString(R.string.expense))
         val adapter = ArrayAdapter(requireContext(), R.layout.item_type, items)
-        (binding.itemType as? AutoCompleteTextView)?.setAdapter(adapter)
+        binding.itemType.let {
+            it.setAdapter(adapter)
+            it.setText(getString(R.string.income), false)
+        }
+        binding.deleteAction.visibility = View.INVISIBLE
+
+        val id = navigationArgs.id
+        if(id > 0) {
+            viewModel.retrieveTransaction(id).observe(this.viewLifecycleOwner) { selectedTransaction ->
+                transaction = selectedTransaction
+                bind(transaction)
+            }
+            binding.deleteAction.visibility = View.VISIBLE
+            binding.deleteAction.setOnClickListener {
+                showConfirmationDialog()
+            }
+        } else {
+            binding.saveAction.setOnClickListener {
+                addNewItem()
+            }
+        }
+    }
+
+    private fun isEntryValid(): Boolean {
+        return viewModel.isEntryValid(
+            binding.itemAmount.text.toString(),
+            binding.itemDescription.text.toString(),
+            binding.itemType.text.toString()
+        )
+    }
+
+    private fun addNewItem() {
+        if (isEntryValid()) {
+            val modelType = getTransactionType()
+            viewModel.addTransaction(
+                binding.itemAmount.text.toString(),
+                binding.itemDescription.text.toString(),
+                modelType
+            )
+            val action = AddTransactionFragmentDirections.actionAddTransactionFragmentToTransactionListFragment()
+            findNavController().navigate(action)
+        } else {
+            binding.itemAmount.error = "Amount required"
+        }
+    }
+
+    private fun showConfirmationDialog() {
+        MaterialAlertDialogBuilder(requireContext())
+            .setTitle(getString(android.R.string.dialog_alert_title))
+            .setMessage(getString(R.string.delete_question))
+            .setCancelable(false)
+            .setNegativeButton(getString(R.string.no)) { _, _ -> }
+            .setPositiveButton(getString(R.string.yes)) { _, _ ->
+                deleteItem()
+            }
+            .show()
+    }
+
+    private fun deleteItem() {
+        viewModel.deleteTransaction(transaction)
+        findNavController().navigateUp()
+    }
+
+    private fun bind(transaction: Transaction) {
+        binding.apply {
+            itemAmount.setText(transaction.amount.toString(), TextView.BufferType.SPANNABLE)
+            itemDescription.setText(transaction.description, TextView.BufferType.SPANNABLE)
+            when(transaction.type) {
+                ITEM_INCOME -> itemType.setText(getString(R.string.income), TextView.BufferType.SPANNABLE)
+                else -> itemType.setText(getString(R.string.expense), TextView.BufferType.SPANNABLE)
+            }
+
+            saveAction.setOnClickListener { updateItem() }
+        }
+    }
 
-        binding.saveAction.setOnClickListener {
-            Snackbar.make(this, binding.itemType.text, Snackbar.LENGTH_SHORT)
+    private fun updateItem() {
+        if (isEntryValid()) {
+            val modelType = getTransactionType()
+            viewModel.update(
+                this.navigationArgs.id,
+                binding.itemAmount.text.toString(),
+                binding.itemDescription.text.toString(),
+                modelType,
+                transaction.createdAt
+            )
+            val action = AddTransactionFragmentDirections.actionAddTransactionFragmentToTransactionListFragment()
+            findNavController().navigate(action)
+        } else {
+            binding.itemAmount.error = "Amount required"
         }
     }
 
+    private fun getTransactionType(): Int {
+        val modelType = when(binding.itemType.text.toString()) {
+            getString(R.string.income) -> ITEM_INCOME
+            else -> ITEM_EXPENSE
+        }
+
+        return modelType
+    }
+
+    override fun onDestroyView() {
+        super.onDestroyView()
+        val inputMethodManager = requireActivity().getSystemService(Context.INPUT_METHOD_SERVICE) as
+                InputMethodManager
+        inputMethodManager.hideSoftInputFromWindow(requireActivity().currentFocus?.windowToken, 0)
+        _binding = null
+    }
+
 }

app/src/main/java/id/ajikamaludin/wallet/ui/TransactionListFragment.kt

@@ -8,9 +8,7 @@ import android.view.ViewGroup
 import androidx.fragment.app.activityViewModels
 import androidx.navigation.fragment.findNavController
 import androidx.recyclerview.widget.LinearLayoutManager
-import id.ajikamaludin.wallet.R
 import id.ajikamaludin.wallet.WalletApplication
-import id.ajikamaludin.wallet.database.TransactionDao
 import id.ajikamaludin.wallet.databinding.FragmentTransactionListBinding
 
 class TransactionListFragment: Fragment() {

app/src/main/java/id/ajikamaludin/wallet/ui/TransactionViewModel.kt

@@ -3,12 +3,78 @@ package id.ajikamaludin.wallet.ui
 import androidx.lifecycle.*
 import id.ajikamaludin.wallet.data.Transaction
 import id.ajikamaludin.wallet.database.TransactionDao
+import kotlinx.coroutines.launch
+import java.text.SimpleDateFormat
+import java.util.*
 
 class TransactionViewModel(private val transactionDao: TransactionDao): ViewModel() {
     val transactions: LiveData<List<Transaction>> = transactionDao.getTransactions().asLiveData()
     val amount: LiveData<String> = transactionDao.getTotalAmount().asLiveData()
     val expense: LiveData<String> = transactionDao.getTotalExpense().asLiveData()
     val income: LiveData<String> = transactionDao.getTotalIncome().asLiveData()
+
+    private fun insertTransaction(transaction: Transaction) {
+        viewModelScope.launch {
+            transactionDao.insert(transaction)
+        }
+    }
+
+    private fun getNewTransactionEntry(amount: String, description: String, type: Int): Transaction {
+        val current = Date()
+
+        val formatter = SimpleDateFormat("dd-M-yyyy hh:mm", Locale.US)
+        val formatted = formatter.format(current)
+
+        return Transaction(
+            amount = amount.toDouble(),
+            description = description,
+            type = type,
+            createdAt = formatted
+        )
+    }
+
+    fun addTransaction(amount: String, description: String, type: Int) {
+        val newTransaction = getNewTransactionEntry(amount, description, type)
+        insertTransaction(newTransaction)
+    }
+
+    fun isEntryValid(amount: String, description: String, type: String): Boolean {
+        if(amount.isBlank() || type.isBlank()) {
+            return false
+        }
+        return true
+    }
+
+    fun retrieveTransaction(id: Long): LiveData<Transaction> {
+        return transactionDao.getTransaction(id).asLiveData()
+    }
+
+    private fun getUpdatedTransactionEntry(id: Long, amount: String, description: String, type: Int, createdAt: String): Transaction {
+        return Transaction(
+            id = id,
+            amount = amount.toDouble(),
+            description = description,
+            type = type,
+            createdAt = createdAt
+        )
+    }
+
+    private fun updateTransaction(transaction: Transaction){
+        viewModelScope.launch {
+            transactionDao.update(transaction)
+        }
+    }
+
+    fun update(id:Long, amount: String, description: String, type: Int, createdAt: String){
+        val transaction = getUpdatedTransactionEntry(id, amount, description, type, createdAt)
+        updateTransaction(transaction)
+    }
+
+    fun deleteTransaction(transaction: Transaction) {
+        viewModelScope.launch {
+            transactionDao.delete(transaction)
+        }
+    }
 }
 
 class TransactionViewModelFactory(private val transactionDao: TransactionDao) : ViewModelProvider.Factory {

app/src/main/res/layout/fragment_add_transaction.xml

@@ -74,6 +74,17 @@
                 app:layout_constraintStart_toStartOf="parent"
                 app:layout_constraintTop_toBottomOf="@+id/item_type_label" />
 
+            <Button
+                android:id="@+id/delete_action"
+                android:layout_width="0dp"
+                android:layout_height="wrap_content"
+                android:layout_marginTop="8dp"
+                android:theme="@style/Button.Red"
+                android:text="@string/delete_action"
+                app:layout_constraintEnd_toEndOf="parent"
+                app:layout_constraintStart_toStartOf="parent"
+                app:layout_constraintTop_toBottomOf="@+id/save_action" />
+
         </androidx.constraintlayout.widget.ConstraintLayout>
     </ScrollView>
 </layout>

app/src/main/res/values-in-rID/strings.xml

@@ -4,8 +4,8 @@
     <string name="hello_blank_fragment">Hello blank fragment</string>
     <string name="create_transaction">Buat Transaksi</string>
     <string name="balance">Saldo</string>
-    <string name="income">Pengeluaran</string>
-    <string name="expense">Pemasukan</string>
+    <string name="expense">Pengeluaran</string>
+    <string name="income">Pemasukan</string>
     <string name="save_action">Simpan</string>
     <string name="amount">Jumlah</string>
     <string name="description">Deskripsi</string>

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

@@ -16,5 +16,5 @@
     <color name="blue_light">#63a4ff</color>
     <color name="blue_dark">#004ba0</color>
 
-    <color name="red_700">#1976d2</color>
+    <color name="red_700">#d32f2f</color>
 </resources>

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

@@ -4,10 +4,14 @@
     <string name="hello_blank_fragment">Hello blank fragment</string>
     <string name="create_transaction">Create Transaction</string>
     <string name="balance">Balance</string>
-    <string name="income">Expense</string>
-    <string name="expense">Income</string>
+    <string name="expense">Expense</string>
+    <string name="income">Income</string>
     <string name="save_action">Save</string>
     <string name="amount">Amount</string>
     <string name="description">Description</string>
     <string name="type">Type</string>
+    <string name="delete_action">Delete</string>
+    <string name="delete_question">Are you sure ?</string>
+    <string name="no">no</string>
+    <string name="yes">Yes</string>
 </resources>

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

@@ -14,4 +14,7 @@
         <item name="helperTextTextAppearance">@style/TextAppearance.MaterialComponents.Subtitle1
         </item>
     </style>
+    <style name="Button.Red" parent="ThemeOverlay.AppCompat">
+        <item name="colorPrimary">@color/red_700</item>
+    </style>
 </resources>