New features: backup & restore data

app/build.gradle.kts

@@ -69,6 +69,8 @@ dependencies {
     implementation("androidx.room:room-ktx:2.6.1")
     annotationProcessor("androidx.room:room-compiler:2.6.1")
     ksp("androidx.room:room-compiler:2.6.1")
+    // Gson
+    implementation("com.google.code.gson:gson:2.10.1")
     // Test
     testImplementation("junit:junit:4.13.2")
     androidTestImplementation("androidx.test.ext:junit:1.1.5")

app/src/main/kotlin/cn/super12138/todo/views/settings/SettingsActivity.kt

@@ -3,14 +3,29 @@ package cn.super12138.todo.views.settings
 import android.os.Bundle
 import android.os.Process
 import android.view.WindowManager
+import androidx.appcompat.app.AlertDialog
 import androidx.appcompat.app.AppCompatDelegate
+import androidx.lifecycle.ViewModelProvider
+import androidx.lifecycle.lifecycleScope
 import androidx.preference.ListPreference
+import androidx.preference.Preference
 import androidx.preference.PreferenceFragmentCompat
 import androidx.preference.SwitchPreferenceCompat
 import cn.super12138.todo.R
 import cn.super12138.todo.databinding.ActivitySettingsBinding
+import cn.super12138.todo.databinding.DialogBackupBinding
+import cn.super12138.todo.databinding.DialogRestoreBinding
+import cn.super12138.todo.logic.Repository
+import cn.super12138.todo.logic.dao.ToDoRoom
 import cn.super12138.todo.views.BaseActivity
+import cn.super12138.todo.views.progress.ProgressFragmentViewModel
+import cn.super12138.todo.views.todo.ToDoFragmentViewModel
+import com.google.android.material.dialog.MaterialAlertDialogBuilder
 import com.google.android.material.snackbar.Snackbar
+import com.google.gson.Gson
+import com.google.gson.JsonSyntaxException
+import com.google.gson.reflect.TypeToken
+import kotlinx.coroutines.launch
 import kotlin.system.exitProcess
 
 class SettingsActivity : BaseActivity() {
@@ -19,7 +34,6 @@ class SettingsActivity : BaseActivity() {
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
 
-
         binding = ActivitySettingsBinding.inflate(layoutInflater)
         setContentView(binding.root)
 
@@ -37,8 +51,15 @@ class SettingsActivity : BaseActivity() {
     }
 
     class SettingsFragment : PreferenceFragmentCompat() {
+        private lateinit var backupBinding: DialogBackupBinding
+        private lateinit var restoreBinding: DialogRestoreBinding
         override fun onCreatePreferences(savedInstanceState: Bundle?, rootKey: String?) {
             setPreferencesFromResource(R.xml.preferences, rootKey)
+            val gson = Gson()
+            val progressViewModel =
+                ViewModelProvider(requireActivity()).get(ProgressFragmentViewModel::class.java)
+            val todoViewModel =
+                ViewModelProvider(requireActivity()).get(ToDoFragmentViewModel::class.java)
 
             findPreference<ListPreference>("dark_mode")?.apply {
                 setOnPreferenceChangeListener { preference, newValue ->
@@ -76,6 +97,79 @@ class SettingsActivity : BaseActivity() {
                     true
                 }
             }
+
+            findPreference<Preference>("backupDB")?.apply {
+                setOnPreferenceClickListener {
+                    lifecycleScope.launch {
+                        val data = Repository.getAll()
+                        val jsonData = gson.toJson(data)
+                        backupBinding = DialogBackupBinding.inflate(layoutInflater)
+                        backupBinding.jsonOutput.text = jsonData
+
+                        activity?.let {
+                            MaterialAlertDialogBuilder(it)
+                                .setTitle(R.string.export_data)
+                                .setView(backupBinding.root)
+                                .setPositiveButton(R.string.ok, null)
+                                .show()
+                        }
+                    }
+                    true
+                }
+            }
+
+            findPreference<Preference>("restoreDB")?.apply {
+                setOnPreferenceClickListener {
+                    restoreBinding = DialogRestoreBinding.inflate(layoutInflater)
+                    activity?.let { it1 ->
+                        val dialog = MaterialAlertDialogBuilder(it1)
+                            .setTitle(R.string.restore_data)
+                            .setView(restoreBinding.root)
+                            .setPositiveButton(R.string.ok, null)
+                            .setNegativeButton(R.string.cancel, null)
+                            .show()
+
+                        dialog.getButton(AlertDialog.BUTTON_POSITIVE).setOnClickListener {
+                            val jsonInput = restoreBinding.jsonInput.editText?.text.toString()
+                            if (jsonInput.isEmpty()) {
+                                restoreBinding.jsonInput.error =
+                                    getString(R.string.please_paste_data)
+                                return@setOnClickListener
+                            }
+
+                            lifecycleScope.launch {
+                                if (restoreBinding.overwriteData.isChecked) {
+                                    Repository.deleteAll()
+                                }
+                                try {
+                                    val listType = object : TypeToken<List<ToDoRoom>>() {}.type
+                                    val taskList: List<ToDoRoom> =
+                                        gson.fromJson(jsonInput, listType)
+                                    taskList.forEach { Repository.insert(it) }
+                                    dialog.dismiss()
+                                    MaterialAlertDialogBuilder(it1)
+                                        .setTitle(R.string.restore_successful)
+                                        .setMessage(R.string.restore_need_restart_app)
+                                        .setPositiveButton(R.string.ok) { _, _ ->
+                                            Process.killProcess(Process.myPid())
+                                            exitProcess(10)
+                                        }
+                                        .setNegativeButton(R.string.cancel, null)
+                                        .setCancelable(false)
+                                        .show()
+                                } catch (e: JsonSyntaxException) {
+                                    restoreBinding.jsonInput.error =
+                                        getString(R.string.json_data_incorrect)
+                                } catch (e: Exception) {
+                                    restoreBinding.jsonInput.error =
+                                        getString(R.string.restore_failed)
+                                }
+                            }
+                        }
+                    }
+                    true
+                }
+            }
         }
     }
 }

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

@@ -0,0 +1,24 @@
+<?xml version="1.0" encoding="utf-8"?>
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:orientation="vertical"
+    android:paddingStart="25dp"
+    android:paddingTop="5dp"
+    android:paddingEnd="25dp">
+
+    <TextView
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:text="@string/backup_tips" />
+
+    <TextView
+        android:id="@+id/json_output"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:layout_marginTop="10dp"
+        android:layout_marginBottom="10dp"
+        android:fontFamily="monospace"
+        android:textColor="?android:attr/textColorPrimary"
+        android:textIsSelectable="true" />
+</LinearLayout>

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

@@ -0,0 +1,39 @@
+<?xml version="1.0" encoding="utf-8"?>
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    android:layout_width="match_parent"
+    android:layout_height="wrap_content"
+    android:orientation="vertical"
+    android:paddingStart="25dp"
+    android:paddingTop="5dp"
+    android:paddingEnd="25dp">
+
+    <TextView
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:text="@string/restore_tips" />
+
+    <CheckBox
+        android:id="@+id/overwrite_data"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:text="@string/overwrite_data" />
+
+    <com.google.android.material.textfield.TextInputLayout
+        android:id="@+id/json_input"
+        style="?attr/textInputFilledStyle"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:hint="@string/paste_data"
+        app:endIconMode="clear_text"
+        app:errorEnabled="true"
+        app:helperText=" "
+        app:helperTextEnabled="true">
+
+        <com.google.android.material.textfield.TextInputEditText
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:singleLine="true" />
+
+    </com.google.android.material.textfield.TextInputLayout>
+</LinearLayout>

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

@@ -2,7 +2,8 @@
 <androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:app="http://schemas.android.com/apk/res-auto"
     android:layout_width="match_parent"
-    android:layout_height="match_parent">
+    android:layout_height="match_parent"
+    android:animateLayoutChanges="true">
 
     <com.google.android.material.progressindicator.CircularProgressIndicator
         android:id="@+id/progress_bar"
@@ -11,16 +12,15 @@
         android:layout_marginLeft="15dp"
         android:layout_marginRight="15dp"
         android:max="100"
+        app:indicatorSize="160dp"
+        app:indicatorTrackGapSize="10dp"
         app:layout_constraintBottom_toBottomOf="parent"
         app:layout_constraintEnd_toEndOf="parent"
         app:layout_constraintStart_toStartOf="parent"
         app:layout_constraintTop_toTopOf="parent"
-        app:indicatorSize="160dp"
         app:trackColor="?attr/colorSurfaceContainerHighest"
         app:trackCornerRadius="25dp"
-        app:trackThickness="10dp"
-        app:showDelay="150"
-        app:indicatorTrackGapSize="10dp"/>
+        app:trackThickness="10dp" />
 
     <LinearLayout
         android:layout_width="wrap_content"

app/src/main/res/values-zh-rCN/strings.xml

@@ -49,4 +49,15 @@
     <string name="backup_summary">备份待办数据库</string>
     <string name="restore">恢复数据库</string>
     <string name="restore_summary">恢复先前备份过的待办数据库</string>
+    <string name="backup_tips">下方是数据库文件，请全选复制以导出</string>
+    <string name="restore_tips">在下方粘贴已经导出的数据库</string>
+    <string name="overwrite_data">覆盖原有数据</string>
+    <string name="paste_data">粘贴导出的数据</string>
+    <string name="export_data">导出数据</string>
+    <string name="restore_data">恢复数据</string>
+    <string name="please_paste_data">请粘贴数据</string>
+    <string name="restore_successful">数据恢复成功</string>
+    <string name="restore_need_restart_app">需要重启应用以应用恢复的数据</string>
+    <string name="json_data_incorrect">JSON 数据格式错误</string>
+    <string name="restore_failed">恢复失败，请检查是否重复恢复同一次备份的数据</string>
 </resources>

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

@@ -49,4 +49,15 @@
     <string name="backup_summary">Backup to-do database</string>
     <string name="restore">Restore database</string>
     <string name="restore_summary">Restore the previously backed up to-do database</string>
+    <string name="backup_tips">The following is the database file, please select all and copy to export.</string>
+    <string name="restore_tips">Paste the exported database below.</string>
+    <string name="overwrite_data">Overwrite old data</string>
+    <string name="paste_data">Paste exported data</string>
+    <string name="export_data">Export data</string>
+    <string name="restore_data">Restore data</string>
+    <string name="please_paste_data">Please paste the data</string>
+    <string name="restore_successful">Data restore successful</string>
+    <string name="restore_need_restart_app">Need to restart the app to apply the recovered data</string>
+    <string name="json_data_incorrect">JSON data format is incorrect</string>
+    <string name="restore_failed">Restore failed, please check if you are attempting to restore the same backup data again.</string>
 </resources>

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

@@ -63,7 +63,7 @@
     </style>
 
     <style name="ToDo.M3AlertDialog" parent="ThemeOverlay.Material3.MaterialAlertDialog">
-        <item name="dialogCornerRadius">28dp</item>
+        <item name="dialogCornerRadius">30dp</item>
         <item name="cornerFamily">rounded</item>
         <item name="android:colorBackground">?attr/colorSurfaceContainerHigh</item>
         <item name="android:layout">@layout/m3_alert_dialog</item>