Hi!

I have a question about collapsing toolbar and tab bar. Is there a way of disable collapsing eg I switch a specific tab on tab bar?

thanks in advance

Lockness

Firstly, thank you for sharing! I want to know how to show the drawer menu icon (burger icon) on the left side of appbar. File: flutter-samples/lib/appbar_sliverappbar/main_appbar_sliverappbar.dart Thanks in advance!

Persistent tab is not really persisting it's view in some situations which leads to app crash when initState is called trying to init state on disposed object.

FlutterError (setState() called after dispose(): _Page2State#faac0(lifecycle state: defunct, not mounted)

To reproduce try to add two more tab pages and jump around randomly from tab to tab (it takes several tab changes to reproduce).

Here's the repro code

class MainPersistentTabBar extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return DefaultTabController(
      length: 4,
      child: Scaffold(
        appBar: AppBar(
          bottom: TabBar(
            tabs: [
              Tab(
                icon: Icon(Icons.directions_car),
                text: "Non persistent",
              ),
              Tab(icon: Icon(Icons.directions_transit), text: "Persistent"),
              Tab(icon: Icon(Icons.directions_bike), text: "Non Persistent"),
              Tab(icon: Icon(Icons.directions_boat), text: "Non Persistent"),
            ],
          ),
          title: Text('Persistent Tab Demo'),
        ),
        body: TabBarView(
          children: [
            Page1(),
            Page2(),
            Text('Page 3'),
            Text('Page 4'),
          ],
        ),
      ),
    );
  }
}

SliverList( delegate: SliverChildBuilderDelegate((_, index) { final song = songs[index % songs.length]; return ListTile( leading: Image.network( song.image, height: 30, fit: BoxFit.cover, ), title: Text( song.title, ), trailing: IconButton( onPressed: () => null, icon: Icon( Icons.add, color: Colors.pinkAccent, ), ), ); }, childCount: 20), ),

inside this one,got it from your file

Flutter : Splash Screen

In Android，from step 1 to 4,I did these, but have a problem is that:

/Users/happyphper/workspace/rrcp_flutter/android/app/src/main/java/com/example/rrcp_flutter/MainActivity.java:17: error: incompatible types: MainActivity cannot be converted to FlutterEngine
    GeneratedPluginRegistrant.registerWith(this);
                                           ^
Note: Some messages have been simplified; recompile with -Xdiags:verbose to get full output
1 error

FAILURE: Build failed with an exception.

* What went wrong:
Execution failed for task ':app:compileDebugJavaWithJavac'.
> Compilation failed; see the compiler error output for details.
...

I clone you project to local and All is right.

So I compare android your directory to my directory,

I find a android/app/src/main/AndroidManifest.xml and android/app/build.gradle are different, the difference is that

# AndroidManifest.xml
...
        <!-- Don't delete the meta-data below.
             This is used by the Flutter tool to generate GeneratedPluginRegistrant.java -->
        <meta-data
            android:name="flutterEmbedding"
            android:value="2" />
...

# build.gradle
...
...
apply plugin: 'com.android.application'
+ apply plugin: 'kotlin-android'
apply from: "$flutterRoot/packages/flutter_tools/gradle/flutter.gradle"
...
dependencies {
+ implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"
    ...
}
...

this is flutter auto created, maybe the result is different version.

put this code to your project, and the error occurred.

I can't solve this problem, Could you have any solution?

My Flutter version.

[✓] Flutter (Channel master, v1.15.4-pre.82, on Mac OS X 10.15.3 19D76, locale en-CN)
    • Flutter version 1.15.4-pre.82 at /usr/local/flutter
    • Framework revision e481fcae52 (32 hours ago), 2020-02-14 22:34:30 -0800
    • Engine revision d60f298d9e
    • Dart version 2.8.0 (build 2.8.0-dev.9.0 edd64e6d5c)

 
[✓] Android toolchain - develop for Android devices (Android SDK version 29.0.2)
    • Android SDK at /Users/wangbaolong/Library/Android/sdk
    • Android NDK location not configured (optional; useful for native profiling support)
    • Platform android-29, build-tools 29.0.2
    • Java binary at: /Applications/Android Studio.app/Contents/jre/jdk/Contents/Home/bin/java
    • Java version OpenJDK Runtime Environment (build 1.8.0_202-release-1483-b49-5587405)
    • All Android licenses accepted.

[✓] Xcode - develop for iOS and macOS (Xcode 11.3.1)
    • Xcode at /Applications/Xcode.app/Contents/Developer
    • Xcode 11.3.1, Build version 11C504
    • CocoaPods version 1.8.4

[✓] Chrome - develop for the web
    • Chrome at /Applications/Google Chrome.app/Contents/MacOS/Google Chrome

[✓] Android Studio (version 3.5)
    • Android Studio at /Applications/Android Studio.app/Contents
    • Flutter plugin version 41.0.2
    • Dart plugin version 191.8593
    • Java version OpenJDK Runtime Environment (build 1.8.0_202-release-1483-b49-5587405)

[✓] VS Code (version 1.42.1)
    • VS Code at /Applications/Visual Studio Code.app/Contents
    • Flutter extension version 3.8.1

[✓] Connected device (3 available)
    • Android SDK built for x86 64 • emulator-5556 • android-x64    • Android 10 (API 29) (emulator)
    • Chrome                       • chrome        • web-javascript • Google Chrome 79.0.3945.130
    • Web Server                   • web-server    • web-javascript • Flutter Tools

Hi, I use your circular_list and i would like to open a new route when i click on images, i tried many things but didn't work, i would really appreciate it if u can lend me a hand.

ps: sorry my english is sooo poor x'(

Fixed this error on build:" error: The function expression type 'Future Function(Uint8List, {int cacheHeight, int cacheWidth})' isn't of type 'Future Function(Uint8List, {bool allowUpscaling, int cacheHeight, int cacheWidth})'. This means its parameter or return type doesn't match what is expected. Consider changing parameter type(s) or the returned type(s). (invalid_cast_function_expr at [flutter_samples] lib/split_image/main_split_image.dart:20)"

It was missing the bool allowupscaling parameter. I have added that, and now its working just fine.

Hello , Hope you doing great , Thanks for your great work . I will be appreciate if you can help me . I used same package " circle_wheel_scroll " , and same example code in read me , to generate a list . and also if possible i wanna add Next and Previous button like a carousel . Thanks in advance

Type mismatch: inferred type is MainActivity but FlutterEngine was expected flutter_app/android/app/src/main/kotlin/com/example/flutter_app/MainActivity.kt: (23, 19): Unresolved reference: getFlutterView flutter_app/android/app/src/main/kotlin/com/example/flutter_app/MainActivity.kt: (26, 17): Unresolved reference: getFlutterView

Mainactivity override fun onCreate(savedInstanceState: Bundle?) { super.onCreate(savedInstanceState) //make transparent status bar window.statusBarColor = 0x00000000 GeneratedPluginRegistrant.registerWith(this) //Remove full screen flag after load val vto = getFlutterView().getViewTreeObserver() vto.addOnGlobalLayoutListener(object : ViewTreeObserver.OnGlobalLayoutListener { override fun onGlobalLayout() { getFlutterView().getViewTreeObserver().removeOnGlobalLayoutListener(this) window.clearFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN) } }) }

Hello Thank you for your SliverAppBar with TabBar example but what i want is also put SliverList to my body because i have a very long list and google recommend using SliverList put when i put SliverList to body i'm getting error maybe you know how to use it with SliverList

Changes

Fixes most dart warnings related to Flutter 2.0.

Discussion

I've tried to migrate Android to Flutter embedding but I've found no alternatives to getFlutterView().getViewTreeObserver() and such so I kept it the same. Setting transparency should be as easy as overriding getTransparencyMode but I've no clue about the fullscreen thing.