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.gitignore

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# Miscellaneous
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*.class
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*.log
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*.pyc
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*.swp
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.DS_Store
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.atom/
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.buildlog/
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.history
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.svn/
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migrate_working_dir/
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# IntelliJ related
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*.iml
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*.ipr
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*.iws
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.idea/
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# The .vscode folder contains launch configuration and tasks you configure in
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# VS Code which you may wish to be included in version control, so this line
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# is commented out by default.
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#.vscode/
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# Flutter/Dart/Pub related
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**/doc/api/
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**/ios/Flutter/.last_build_id
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.dart_tool/
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.flutter-plugins
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.flutter-plugins-dependencies
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.packages
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.pub-cache/
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.pub/
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/build/
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# Symbolication related
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app.*.symbols
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# Obfuscation related
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app.*.map.json
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# Android Studio will place build artifacts here
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/android/app/debug
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/android/app/profile
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/android/app/release

README.md

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# how-to-customize-column-header-text-during-Excel-and-PDF-export-in-Flutter-DataTable
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How to customize column header text during Excel and PDF export in Flutter DataTable (SfDataGrid)?
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# How to customize column header text during Excel and PDF export in Flutter DataTable (SfDataGrid)
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This article explains how to customize the column header when exporting a DataGrid to an Excel or PDF document.
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## STEP 1:
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The DataGridToPdfConverter and DataGridToExcelConverter classes provide the functionality to customize the column header while exporting a DataGrid to an Excel or PDF document. This can be achieved by using the exportColumnHeader method according to your requirements. To modify the column name, you can access the actual column header text from the GridColumn.label property and assign it to the corresponding column header while exporting.
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```dart
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class CustomDataGridToPdfConverter extends DataGridToPdfConverter {
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@override
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void exportColumnHeader(SfDataGrid dataGrid, GridColumn column,
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String columnName, PdfGrid pdfGrid) {
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var label = columnName;
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// Based on the widget tree structure, you can access the value from the GridColumn.label property.
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//For example, if the label property of the GridColumn contains a Container widget,
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//you need to locate the text widget within it and then retrieve the value stored in its data property
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if (column.label is Container) {
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label = ((column.label as Container).child as Text).data!;
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} else if (column.label is Text) {
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label = (column.label as Text).data!;
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} else if (column.label is Center) {
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label = ((column.label as Center).child as Text).data!;
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}
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super.exportColumnHeader(dataGrid, column, label, pdfGrid);
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}
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}
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class CustomDataGridToExcelConverter extends DataGridToExcelConverter {
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@override
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void exportColumnHeader(SfDataGrid dataGrid, GridColumn column,
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String columnName, Worksheet worksheet) {
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var label = columnName;
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if (column.label is Container) {
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label = ((column.label as Container).child as Text).data!;
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} else if (column.label is Text) {
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label = (column.label as Text).data!;
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} else if (column.label is Center) {
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label = ((column.label as Center).child as Text).data!;
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}
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super.exportColumnHeader(dataGrid, column, label, worksheet);
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}
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}
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```
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## STEP 2:
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The exportDataGridToExcel and exportDataGridToPDF methods are used to export [SfDataGrid](https://pub.dev/documentation/syncfusion_flutter_datagrid/latest/datagrid/SfDataGrid-class.html) to Excel and PDF formats, respectively.
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```dart
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Future<void> exportDataGridToExcel() async {
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final Workbook workbook =
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key.currentState!.exportToExcelWorkbook(converter: excelConverter);
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final List<int> bytes = workbook.saveAsStream();
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await helper.saveAndLaunchFile(bytes, 'DataGrid.xlsx');
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workbook.dispose();
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}
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void exportDataGridToPDF() async {
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PdfDocument document = key.currentState!.exportToPdfDocument(
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fitAllColumnsInOnePage: true, converter: pdfConverter);
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final List<int> bytes = document.saveSync();
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await helper.saveAndLaunchFile(bytes, 'DataGrid.pdf');
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document.dispose();
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}
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```

android/.gitignore

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gradle-wrapper.jar
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/.gradle
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/captures/
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/gradlew
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/gradlew.bat
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/local.properties
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GeneratedPluginRegistrant.java
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# Remember to never publicly share your keystore.
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# See https://flutter.dev/docs/deployment/android#reference-the-keystore-from-the-app
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key.properties
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**/*.keystore
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**/*.jks

android/app/build.gradle

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def localProperties = new Properties()
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def localPropertiesFile = rootProject.file('local.properties')
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if (localPropertiesFile.exists()) {
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localPropertiesFile.withReader('UTF-8') { reader ->
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localProperties.load(reader)
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}
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}
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def flutterRoot = localProperties.getProperty('flutter.sdk')
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if (flutterRoot == null) {
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throw new GradleException("Flutter SDK not found. Define location with flutter.sdk in the local.properties file.")
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}
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def flutterVersionCode = localProperties.getProperty('flutter.versionCode')
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if (flutterVersionCode == null) {
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flutterVersionCode = '1'
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}
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def flutterVersionName = localProperties.getProperty('flutter.versionName')
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if (flutterVersionName == null) {
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flutterVersionName = '1.0'
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}
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apply plugin: 'com.android.application'
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apply plugin: 'kotlin-android'
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apply from: "$flutterRoot/packages/flutter_tools/gradle/flutter.gradle"
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android {
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namespace "com.example.flutter_application"
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compileSdkVersion flutter.compileSdkVersion
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ndkVersion flutter.ndkVersion
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compileOptions {
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sourceCompatibility JavaVersion.VERSION_1_8
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targetCompatibility JavaVersion.VERSION_1_8
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}
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kotlinOptions {
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jvmTarget = '1.8'
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}
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sourceSets {
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main.java.srcDirs += 'src/main/kotlin'
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}
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defaultConfig {
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// TODO: Specify your own unique Application ID (https://developer.android.com/studio/build/application-id.html).
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applicationId "com.example.flutter_application"
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// You can update the following values to match your application needs.
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// For more information, see: https://docs.flutter.dev/deployment/android#reviewing-the-gradle-build-configuration.
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minSdkVersion flutter.minSdkVersion
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targetSdkVersion flutter.targetSdkVersion
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versionCode flutterVersionCode.toInteger()
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versionName flutterVersionName
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}
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buildTypes {
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release {
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// TODO: Add your own signing config for the release build.
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// Signing with the debug keys for now, so `flutter run --release` works.
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signingConfig signingConfigs.debug
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}
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}
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}
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flutter {
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source '../..'
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}
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dependencies {
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implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"
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}
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<manifest xmlns:android="http://schemas.android.com/apk/res/android">
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<!-- The INTERNET permission is required for development. Specifically,
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the Flutter tool needs it to communicate with the running application
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to allow setting breakpoints, to provide hot reload, etc.
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-->
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<uses-permission android:name="android.permission.INTERNET"/>
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</manifest>
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<manifest xmlns:android="http://schemas.android.com/apk/res/android">
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<application
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android:label="flutter_application"
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android:name="${applicationName}"
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android:icon="@mipmap/ic_launcher">
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<activity
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android:name=".MainActivity"
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android:exported="true"
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android:launchMode="singleTop"
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android:theme="@style/LaunchTheme"
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android:configChanges="orientation|keyboardHidden|keyboard|screenSize|smallestScreenSize|locale|layoutDirection|fontScale|screenLayout|density|uiMode"
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android:hardwareAccelerated="true"
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android:windowSoftInputMode="adjustResize">
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<!-- Specifies an Android theme to apply to this Activity as soon as
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the Android process has started. This theme is visible to the user
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while the Flutter UI initializes. After that, this theme continues
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to determine the Window background behind the Flutter UI. -->
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<meta-data
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android:name="io.flutter.embedding.android.NormalTheme"
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android:resource="@style/NormalTheme"
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/>
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<intent-filter>
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<action android:name="android.intent.action.MAIN"/>
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<category android:name="android.intent.category.LAUNCHER"/>
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</intent-filter>
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</activity>
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<!-- Don't delete the meta-data below.
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This is used by the Flutter tool to generate GeneratedPluginRegistrant.java -->
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<meta-data
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android:name="flutterEmbedding"
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android:value="2" />
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</application>
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</manifest>
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package com.example.flutter_application
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import io.flutter.embedding.android.FlutterActivity
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class MainActivity: FlutterActivity() {
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}
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<?xml version="1.0" encoding="utf-8"?>
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<!-- Modify this file to customize your launch splash screen -->
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<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
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<item android:drawable="?android:colorBackground" />
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<!-- You can insert your own image assets here -->
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<!-- <item>
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<bitmap
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android:gravity="center"
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android:src="@mipmap/launch_image" />
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</item> -->
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</layer-list>
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<?xml version="1.0" encoding="utf-8"?>
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<!-- Modify this file to customize your launch splash screen -->
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<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
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<item android:drawable="@android:color/white" />
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<!-- You can insert your own image assets here -->
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<!-- <item>
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<bitmap
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android:gravity="center"
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android:src="@mipmap/launch_image" />
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</item> -->
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</layer-list>
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