投稿者: kawano

Daz3D Clothes

Daz3DでBlenderで作成したClothesを取り込む手順です。

BlenderでWavefront Objファイル形式でエクスポートします。OBJをエクスポートの 前方: -Yが前方、上: Zが上をそれぞれ指定します。

Genesis 8 Starter Essentialsをタプルクリックして Genesis 8 femaleまたはGenesis 8 maleを選択します。

File – Importを選択してWavefront Object – Objファイルを読み込みます。DAZ COLLADA – daeファイル、Autodesk FBX – fbxファイルは読み込みに失敗する場合があります。OBJ Import OptionsのFromを選択して 1 unit = 1m の項目を選択します。

Edit – Figure – Transfer Utilityを選択します。Source: のScene itemにGenesis 8 famale (male)、Target: の Scene itemにインポートした項目を指定します。Acceptをクリックします。

Unity Input System

Unity InputSystemでキーの割り当てを変更する方法です。今回はPlayer InputのCreate Actionsで生成されるInput ActionsのAction Maps -> Player -> Actions -> Fire に Space [Keyboard]を追加してそれを実行後にスクリプトから変更します。

パッケージマネージャーからInput Systemをインストールします。

オブジェクト(GameObject)に Player Input コンポーネントを追加します。Create ActionsボタンをクリックしてInput Actionsを作成します。inputactionsファイルを選択して Edit asset ボタンをクリックします。

Action Maps -> Player -> Actions -> Fire を選択します。All Control SchemesをKeyboardMouseに変更します。Fireの+ボタンをクリックしてAdd Bindingを選択します。PropertiesのBinding – Path をクリックします。Keyboard -> By Location of Key (Using US Layout)のSpaceを選択します。Use in Control Scheme の Keyboard&Mouseをチェックします。

スクリプトを追加、変更します。以下のように変更します。クラスの宣言は省略しています。

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EnlighterJS 3 Syntax Highlighter
public PlayerInput playerInput;
private InputAction fireInputAction;
private InputBinding keyboardInputBinding;
　// Start is called before the first frame update
void Start()
{
playerInput = GetComponent<PlayerInput>();
fireInputAction= playerInput.actions["Fire"];
// keyboardInputBinding= fireInputAction.bindings[5];
fireInputAction.ApplyBindingOverride(new InputBinding() { path = "<Keyboard>/space", overridePath = "<Keyboard>/q" });
// fireInputAction.ApplyBindingOverride(5, "<Keyboard>/q");
// keyboardInputBinding = fireInputAction.bindings[5];
}
// Update is called once per frame
void Update()
{
}
public void OnMove(InputValue value)
{
var wasd = value.Get<Vector2>();
}
public void OnLook(InputValue value)
{
}
public void OnFire()
{
// Spaceキーの代わりにQキーを押すと以下のコートが実行されます
}
public PlayerInput playerInput; private InputAction fireInputAction; private InputBinding keyboardInputBinding; 　// Start is called before the first frame update void Start() { playerInput = GetComponent<PlayerInput>(); fireInputAction= playerInput.actions["Fire"]; // keyboardInputBinding= fireInputAction.bindings[5]; fireInputAction.ApplyBindingOverride(new InputBinding() { path = "<Keyboard>/space", overridePath = "<Keyboard>/q" }); // fireInputAction.ApplyBindingOverride(5, "<Keyboard>/q"); // keyboardInputBinding = fireInputAction.bindings[5]; } // Update is called once per frame void Update() { } public void OnMove(InputValue value) { var wasd = value.Get<Vector2>(); } public void OnLook(InputValue value) { } public void OnFire() { // Spaceキーの代わりにQキーを押すと以下のコートが実行されます }
    
    public PlayerInput playerInput;
    private InputAction fireInputAction;
    private InputBinding keyboardInputBinding;

　// Start is called before the first frame update
    void Start()
    {
        playerInput = GetComponent<PlayerInput>();

        fireInputAction= playerInput.actions["Fire"];
        // keyboardInputBinding= fireInputAction.bindings[5];
        fireInputAction.ApplyBindingOverride(new InputBinding() { path = "<Keyboard>/space", overridePath = "<Keyboard>/q" });
        // fireInputAction.ApplyBindingOverride(5, "<Keyboard>/q");
        // keyboardInputBinding = fireInputAction.bindings[5];

    }

    // Update is called once per frame
    void Update()
    {

    }

    public void OnMove(InputValue value)
    {
        var wasd = value.Get<Vector2>();
    }

    public void OnLook(InputValue value)
    {

    }

    public void OnFire()
    {
        // Spaceキーの代わりにQキーを押すと以下のコートが実行されます
    }

keyboardInputBinding.path が “<Keyboard>/space” から”<Keyboard>/q” に変更されます。qは大文字、小文字どちらでも構わないようです。keyboardInputBinding.groupsはKeyboard&Mouseとなります。

ApplyBindingOverrideはInputBindingクラスを作成する方法とindexを指定する方法とあります。

ActionsのFireという名前がそのままOnFireというメソッドの名前になります。

運用としてはUIにCanvasを作成してインタラクションコンポーネントを利用して変更することになります。ほかのゲームでは左右に矢印ボタンを配置してクリックして選択したり、キー入力を受け付けたりして変更しています。

Unityの新しい入力システムInputSystemを使ってみる

https://gametukurikata.com/basic/inputsystem

こちらのサイトが参考になります。

Unity Scriptable Render Pipeline

スクリプタブルレンダーパイプラインの概要

https://blogs.unity3d.com/jp/2018/01/31/srp-overview/

こちらのブログについて Unity 2019.1 以降で CullingResults, DrawRendererSettings の個所などでエラーが発生して動作しなくなりました。

これはこのクラスがExperimentalに指定されて、Unity 2019.1 以降のバージョンでは利用できなくなりました。次のように書き換えると動作しました。

BasicAssetPipe.cs

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using UnityEngine;
using UnityEngine.Rendering;
// using UnityEngine.Experimental.Rendering;
[ExecuteInEditMode]
public class BasicAssetPipe : RenderPipelineAsset
{
public Color clearColor = Color.green;
#if UNITY_EDITOR
[UnityEditor.MenuItem("SRP-Demo/01 - Create Basic Asset Pipeline")]
static void CreateBasicAssetPipeline()
{
var instance = ScriptableObject.CreateInstance<BasicAssetPipe>();
UnityEditor.AssetDatabase.CreateAsset(instance, "Assets/SRP-Demo/1-BasicAssetPipe/BasicAssetPipe.asset");
}
#endif
protected override RenderPipeline CreatePipeline()
{
return new BasicPipeInstance(clearColor);
}
}
public class BasicPipeInstance : RenderPipeline
{
private Color m_ClearColor = Color.black;
public BasicPipeInstance(Color clearColor)
{
m_ClearColor = clearColor;
}
protected override void Render(ScriptableRenderContext context, Camera[] cameras)
{
// does not so much yet :()
// base.Render(context, cameras);
// clear buffers to the configured color
var cmd = new CommandBuffer();
cmd.ClearRenderTarget(true, true, m_ClearColor);
context.ExecuteCommandBuffer(cmd);
cmd.Release();
context.Submit();
}
}
using UnityEngine; using UnityEngine.Rendering; // using UnityEngine.Experimental.Rendering; [ExecuteInEditMode] public class BasicAssetPipe : RenderPipelineAsset { public Color clearColor = Color.green; #if UNITY_EDITOR [UnityEditor.MenuItem("SRP-Demo/01 - Create Basic Asset Pipeline")] static void CreateBasicAssetPipeline() { var instance = ScriptableObject.CreateInstance<BasicAssetPipe>(); UnityEditor.AssetDatabase.CreateAsset(instance, "Assets/SRP-Demo/1-BasicAssetPipe/BasicAssetPipe.asset"); } #endif protected override RenderPipeline CreatePipeline() { return new BasicPipeInstance(clearColor); } } public class BasicPipeInstance : RenderPipeline { private Color m_ClearColor = Color.black; public BasicPipeInstance(Color clearColor) { m_ClearColor = clearColor; } protected override void Render(ScriptableRenderContext context, Camera[] cameras) { // does not so much yet :() // base.Render(context, cameras); // clear buffers to the configured color var cmd = new CommandBuffer(); cmd.ClearRenderTarget(true, true, m_ClearColor); context.ExecuteCommandBuffer(cmd); cmd.Release(); context.Submit(); } }
using UnityEngine;
using UnityEngine.Rendering;
// using UnityEngine.Experimental.Rendering;


[ExecuteInEditMode]
public class BasicAssetPipe : RenderPipelineAsset
{
    public Color clearColor = Color.green;

#if UNITY_EDITOR
    [UnityEditor.MenuItem("SRP-Demo/01 - Create Basic Asset Pipeline")]
    static void CreateBasicAssetPipeline()
    {
        var instance = ScriptableObject.CreateInstance<BasicAssetPipe>();
        UnityEditor.AssetDatabase.CreateAsset(instance, "Assets/SRP-Demo/1-BasicAssetPipe/BasicAssetPipe.asset");
    }

#endif

    protected override RenderPipeline CreatePipeline()
    {
        return new BasicPipeInstance(clearColor);
    }
}

public class BasicPipeInstance : RenderPipeline
{
    private Color m_ClearColor = Color.black;

    public BasicPipeInstance(Color clearColor)
    {
        m_ClearColor = clearColor;
    }

    protected override void Render(ScriptableRenderContext context, Camera[] cameras)
    {
        // does not so much yet :()
        // base.Render(context, cameras);

        // clear buffers to the configured color
        var cmd = new CommandBuffer();
        cmd.ClearRenderTarget(true, true, m_ClearColor);
        context.ExecuteCommandBuffer(cmd);
        cmd.Release();
        context.Submit();
    }
}

OpaqueAssetPipe.cs

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EnlighterJS 3 Syntax Highlighter
using System;
using UnityEngine;
using UnityEngine.Rendering;
// using UnityEngine.Experimental.Rendering;
[ExecuteInEditMode]
public class OpaqueAssetPipe : RenderPipelineAsset
{
#if UNITY_EDITOR
[UnityEditor.MenuItem("SRP-Demo/02 - Create Opaque Asset Pipeline")]
static void CreateBasicAssetPipeline()
{
var instance = ScriptableObject.CreateInstance<OpaqueAssetPipe>();
UnityEditor.AssetDatabase.CreateAsset(instance, "Assets/SRP-Demo/2-OpaqueAssetPipe/OpaqueAssetPipe.asset");
}
#endif
protected override RenderPipeline CreatePipeline()
{
return new OpaqueAssetPipeInstance();
}
}
public class OpaqueAssetPipeInstance : RenderPipeline
{
protected override void Render(ScriptableRenderContext context, Camera[] cameras)
{
// base.Render(context, cameras);
foreach (var camera in cameras)
{
// Culling
ScriptableCullingParameters cullingParams;
if (!(camera.TryGetCullingParameters(out cullingParams)))
continue;
var cull = context.Cull(ref cullingParams);
// Setup camera for rendering (sets render target, view/projection matrices and other
// per-camera built-in shader variables).
context.SetupCameraProperties(camera);
// clear depth buffer
var cmd = new CommandBuffer();
cmd.ClearRenderTarget(true, false, Color.black);
context.ExecuteCommandBuffer(cmd);
cmd.Release();
// Draw opaque objects using BasicPass shader pass
var settings = new DrawingSettings(new ShaderTagId("BasicPass"), new SortingSettings(camera));
settings.sortingSettings = new SortingSettings() { criteria = SortingCriteria.CommonOpaque };
var filterSettings = new FilteringSettings(renderQueueRange: RenderQueueRange.opaque);
context.DrawRenderers(cull, ref settings ,ref filterSettings);
// Draw skybox
context.DrawSkybox(camera);
context.Submit();
}
}
}
using System; using UnityEngine; using UnityEngine.Rendering; // using UnityEngine.Experimental.Rendering; [ExecuteInEditMode] public class OpaqueAssetPipe : RenderPipelineAsset { #if UNITY_EDITOR [UnityEditor.MenuItem("SRP-Demo/02 - Create Opaque Asset Pipeline")] static void CreateBasicAssetPipeline() { var instance = ScriptableObject.CreateInstance<OpaqueAssetPipe>(); UnityEditor.AssetDatabase.CreateAsset(instance, "Assets/SRP-Demo/2-OpaqueAssetPipe/OpaqueAssetPipe.asset"); } #endif protected override RenderPipeline CreatePipeline() { return new OpaqueAssetPipeInstance(); } } public class OpaqueAssetPipeInstance : RenderPipeline { protected override void Render(ScriptableRenderContext context, Camera[] cameras) { // base.Render(context, cameras); foreach (var camera in cameras) { // Culling ScriptableCullingParameters cullingParams; if (!(camera.TryGetCullingParameters(out cullingParams))) continue; var cull = context.Cull(ref cullingParams); // Setup camera for rendering (sets render target, view/projection matrices and other // per-camera built-in shader variables). context.SetupCameraProperties(camera); // clear depth buffer var cmd = new CommandBuffer(); cmd.ClearRenderTarget(true, false, Color.black); context.ExecuteCommandBuffer(cmd); cmd.Release(); // Draw opaque objects using BasicPass shader pass var settings = new DrawingSettings(new ShaderTagId("BasicPass"), new SortingSettings(camera)); settings.sortingSettings = new SortingSettings() { criteria = SortingCriteria.CommonOpaque }; var filterSettings = new FilteringSettings(renderQueueRange: RenderQueueRange.opaque); context.DrawRenderers(cull, ref settings ,ref filterSettings); // Draw skybox context.DrawSkybox(camera); context.Submit(); } } }
using System;
using UnityEngine;
using UnityEngine.Rendering;
// using UnityEngine.Experimental.Rendering;

[ExecuteInEditMode]
public class OpaqueAssetPipe : RenderPipelineAsset
{
#if UNITY_EDITOR
    [UnityEditor.MenuItem("SRP-Demo/02 - Create Opaque Asset Pipeline")]
    static void CreateBasicAssetPipeline()
    {
        var instance = ScriptableObject.CreateInstance<OpaqueAssetPipe>();
        UnityEditor.AssetDatabase.CreateAsset(instance, "Assets/SRP-Demo/2-OpaqueAssetPipe/OpaqueAssetPipe.asset");
    }
#endif

    protected override RenderPipeline CreatePipeline()
    {
        return new OpaqueAssetPipeInstance();
    }
}

public class OpaqueAssetPipeInstance : RenderPipeline
{
    protected override void Render(ScriptableRenderContext context, Camera[] cameras)
    {
        // base.Render(context, cameras);

        foreach (var camera in cameras)
        {
            // Culling
            ScriptableCullingParameters cullingParams;

            if (!(camera.TryGetCullingParameters(out cullingParams)))
                 continue;

            var cull = context.Cull(ref cullingParams);

            // Setup camera for rendering (sets render target, view/projection matrices and other
            // per-camera built-in shader variables).
            context.SetupCameraProperties(camera);

            // clear depth buffer
            var cmd = new CommandBuffer();
            cmd.ClearRenderTarget(true, false, Color.black);
            context.ExecuteCommandBuffer(cmd);
            cmd.Release();

            // Draw opaque objects using BasicPass shader pass
            var settings = new DrawingSettings(new ShaderTagId("BasicPass"), new SortingSettings(camera));
            settings.sortingSettings = new SortingSettings() { criteria = SortingCriteria.CommonOpaque };
            var filterSettings = new FilteringSettings(renderQueueRange: RenderQueueRange.opaque);
            context.DrawRenderers(cull, ref settings ,ref filterSettings);

            // Draw skybox
            context.DrawSkybox(camera);

            context.Submit();
        }
    }
}

TransparentAssetPipe.cs

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using System;
using UnityEngine;
using UnityEngine.Rendering;
// using UnityEngine.Experimental.Rendering;
[ExecuteInEditMode]
public class TransparentAssetPipe : RenderPipelineAsset
{
#if UNITY_EDITOR
[UnityEditor.MenuItem("SRP-Demo/03 - Create Transparent Asset Pipeline")]
static void CreateBasicAssetPipeline()
{
var instance = ScriptableObject.CreateInstance<TransparentAssetPipe>();
UnityEditor.AssetDatabase.CreateAsset(instance, "Assets/SRP-Demo/3-TransparentAssetPipe/TransparentAssetPipe.asset");
}
#endif
protected override RenderPipeline CreatePipeline()
{
return new TransparentAssetPipeInstance();
}
}
public class TransparentAssetPipeInstance : RenderPipeline
{
protected override void Render(ScriptableRenderContext context, Camera[] cameras)
{
// base.Render(context, cameras);
foreach (var camera in cameras)
{
// Culling
ScriptableCullingParameters cullingParams;
if (!(camera.TryGetCullingParameters(out cullingParams)))
continue;
var cull = context.Cull(ref cullingParams);
// Setup camera for rendering (sets render target, view/projection matrices and other
// per-camera built-in shader variables).
context.SetupCameraProperties(camera);
// clear depth buffer
var cmd = new CommandBuffer();
cmd.ClearRenderTarget(true, false, Color.black);
context.ExecuteCommandBuffer(cmd);
cmd.Release();
// Draw opaque objects using BasicPass shader pass
var settings = new DrawingSettings(new ShaderTagId("BasicPass"), new SortingSettings(camera));
settings.sortingSettings = new SortingSettings() { criteria = SortingCriteria.CommonOpaque };
var filterSettings = new FilteringSettings(renderQueueRange: RenderQueueRange.opaque);
context.DrawRenderers(cull, ref settings, ref filterSettings);
// Draw skybox
context.DrawSkybox(camera);
settings.sortingSettings = new SortingSettings() { criteria = SortingCriteria.CommonTransparent };
filterSettings = new FilteringSettings(renderQueueRange: RenderQueueRange.transparent);
context.DrawRenderers(cull, ref settings, ref filterSettings);
context.Submit();
}
}
}
using System; using UnityEngine; using UnityEngine.Rendering; // using UnityEngine.Experimental.Rendering; [ExecuteInEditMode] public class TransparentAssetPipe : RenderPipelineAsset { #if UNITY_EDITOR [UnityEditor.MenuItem("SRP-Demo/03 - Create Transparent Asset Pipeline")] static void CreateBasicAssetPipeline() { var instance = ScriptableObject.CreateInstance<TransparentAssetPipe>(); UnityEditor.AssetDatabase.CreateAsset(instance, "Assets/SRP-Demo/3-TransparentAssetPipe/TransparentAssetPipe.asset"); } #endif protected override RenderPipeline CreatePipeline() { return new TransparentAssetPipeInstance(); } } public class TransparentAssetPipeInstance : RenderPipeline { protected override void Render(ScriptableRenderContext context, Camera[] cameras) { // base.Render(context, cameras); foreach (var camera in cameras) { // Culling ScriptableCullingParameters cullingParams; if (!(camera.TryGetCullingParameters(out cullingParams))) continue; var cull = context.Cull(ref cullingParams); // Setup camera for rendering (sets render target, view/projection matrices and other // per-camera built-in shader variables). context.SetupCameraProperties(camera); // clear depth buffer var cmd = new CommandBuffer(); cmd.ClearRenderTarget(true, false, Color.black); context.ExecuteCommandBuffer(cmd); cmd.Release(); // Draw opaque objects using BasicPass shader pass var settings = new DrawingSettings(new ShaderTagId("BasicPass"), new SortingSettings(camera)); settings.sortingSettings = new SortingSettings() { criteria = SortingCriteria.CommonOpaque }; var filterSettings = new FilteringSettings(renderQueueRange: RenderQueueRange.opaque); context.DrawRenderers(cull, ref settings, ref filterSettings); // Draw skybox context.DrawSkybox(camera); settings.sortingSettings = new SortingSettings() { criteria = SortingCriteria.CommonTransparent }; filterSettings = new FilteringSettings(renderQueueRange: RenderQueueRange.transparent); context.DrawRenderers(cull, ref settings, ref filterSettings); context.Submit(); } } }
using System;
using UnityEngine;
using UnityEngine.Rendering;
// using UnityEngine.Experimental.Rendering;

[ExecuteInEditMode]
public class TransparentAssetPipe : RenderPipelineAsset
{
#if UNITY_EDITOR
    [UnityEditor.MenuItem("SRP-Demo/03 - Create Transparent Asset Pipeline")]
    static void CreateBasicAssetPipeline()
    {
        var instance = ScriptableObject.CreateInstance<TransparentAssetPipe>();
        UnityEditor.AssetDatabase.CreateAsset(instance, "Assets/SRP-Demo/3-TransparentAssetPipe/TransparentAssetPipe.asset");
    }
#endif

    protected override RenderPipeline CreatePipeline()
    {
        return new TransparentAssetPipeInstance();
    }
}

public class TransparentAssetPipeInstance : RenderPipeline
{
    protected override void Render(ScriptableRenderContext context, Camera[] cameras)
    {
        // base.Render(context, cameras);

        foreach (var camera in cameras)
        {
            // Culling
            ScriptableCullingParameters cullingParams;

            if (!(camera.TryGetCullingParameters(out cullingParams)))
                continue;

            var cull = context.Cull(ref cullingParams);

            // Setup camera for rendering (sets render target, view/projection matrices and other
            // per-camera built-in shader variables).
            context.SetupCameraProperties(camera);

            // clear depth buffer
            var cmd = new CommandBuffer();
            cmd.ClearRenderTarget(true, false, Color.black);
            context.ExecuteCommandBuffer(cmd);
            cmd.Release();

            // Draw opaque objects using BasicPass shader pass
            var settings = new DrawingSettings(new ShaderTagId("BasicPass"), new SortingSettings(camera));
            settings.sortingSettings = new SortingSettings() { criteria = SortingCriteria.CommonOpaque };
            var filterSettings = new FilteringSettings(renderQueueRange: RenderQueueRange.opaque);
            context.DrawRenderers(cull, ref settings, ref filterSettings);


            // Draw skybox
            context.DrawSkybox(camera);

            settings.sortingSettings = new SortingSettings() { criteria = SortingCriteria.CommonTransparent };
            filterSettings = new FilteringSettings(renderQueueRange: RenderQueueRange.transparent);
            context.DrawRenderers(cull, ref settings, ref filterSettings);

            context.Submit();
        }
    }
}

こちらのサイトが参考になりました。

LWRP 4-preview を2019.1で動かすように改造した話

https://connect.unity.com/p/lwrp-4-preview-wo2019-1dedong-kasuyounigai-zao-shitahua

Unity Scriptable Render Pipeline(SRP)はパッケージマネージャーからUniversal Render Pipeline(URP, 2019より前はLightweight Render Pipeline(LWRP))、HD レンダーパイプライン（HDRP)をチェックしなくても利用できます。

flutter 1.15.3 dev, error

flutter_windows_1.17.2-stable では発生しません。

flutter_windows_v1.15.3-dev でビルドをで次のエラーが発生します。

Launching lib\main.dart on Android SDK built for x86 in debug mode...
Running Gradle task 'assembleDebug'...
U
nhandled exception:
Crash when compiling package:firebase_admob/firebase_admob.dart,
at character offset null:
NoSuchM
ethodError: The method 'accept' was called on null.
Receiver: null
Tried calling: accept<DartType>(Instance of '_DemotionNonNullification')
#0      Object.noSuchMethod (dart:core-patch/object_patch.dart:53:5)
#1      demoteTypeInLibrary (package:front_end/src/fasta/type_inference/type_demotion.dart:65:14)
#2      TypeInferrerImpl.inferDeclarationType (package:front_end/src/fasta/type_inference/type_inferrer.dart:1889:14)
#3      InferenceVisitor.visitVariableDeclaration (package:front_end/src/fasta/kernel/inference_visitor.dart:5337:31)
#4      VariableDeclaration.accept (package:kernel/ast.dart:5495:43)
#5      TypeInferrerImpl.inferStatement (package:front_end/src/fasta/type_inference/type_inferrer.dart:3245:24)
#6      InferenceVisitor._visitStatements (package:front_end/src/fasta/kernel/inference_visitor.dart:299:20)
#7      InferenceVisitor.visitBlock (package:front_end/src/fasta/kernel/inference_visitor.dart:320:30)
#8      Block.accept (package:kernel/ast.dart:4722:43)
#9      TypeInferrerIm
pl.inferStatement (package:front_end/src/fasta/type_inference/type_inferrer.dart:3245:24)
#
10     TypeInferrerImpl.inferLocalFunction (package:front_end/src/fa
sta/type_inference/type_inferrer.dart:2595:43)
#11     Inf
erenceVisitor.visitFunctionNode (package:front_end/
src/fasta/kernel/inference_visitor.dart:1041:21)
#
12     InferenceVisitor.visitFunctionExpression (package:front_end/s
rc/fasta/
kernel/inference_visitor.dart:1065:9)
#13     FunctionExpr
ession.accept1 (package:kernel/ast.dart:4523:9
)
#14     TypeInferrerImpl.inferExpression (package:fr
ont_end/src/fasta/type_inference/type_inferrer.d
art:1988:27)
#15     InferenceVisitor.inferMapEntry (packa
ge:front_end/src/fasta/kernel/inference_visitor
.dart:1998:56)
#16     InferenceVisitor.visitMapLiteral (
package:front_end/src/fasta/kernel/inference_vis
itor.dart:2161:17)
#17     MapLiteral.accept1 (package:
kernel/ast.dart:4431:9)
#18     TypeI
nferrerImpl.inferExpression (package:front_end/src/fasta
/type_inference/type
_inferrer.dart:1988:27)
#19     _ImplicitFieldTypeRoot.
computeType (package:fr
ont_end/src/fasta/kernel/implicit_field_type.dart:138:55)
#20  
   SourceFieldBuilder.inferType (package:front_e
nd/src/fasta/builder/field_builder.dart:334:47)
#21 
    SourceLoader.performTopLevelInference (package:fro
nt_end/src/fasta/source/source_loader.dart:1109:35)
#2
2     KernelTarget.buildOutlines.<anonymous closur
e> (package:front_end/src/fasta/kernel/kernel_target
.dart:312:14)
<asynchronous s
uspension>
#23     withCrashReporting (package:front_end/sr
c/fasta/crash.dart:122:24)
#24     KernelTarget.buildOut
lines (package:front_end/src/fasta/kernel/kernel_tar
get.dart:288:12)
#25     generateKernelInternal.<anonymous
 closure> (package:front_end/src/kernel_generat
or_impl.dart:108:28)
<asynchronous suspension>
#26     withCrashReporting (package:fro
nt_end/src/fasta/crash.dart:122:24)
#27     generateKernelInte
rnal (package:front_end/src/kernel_generator_impl.dart:70:10)
#28     ke
rnelForProgramInternal.<anonymous closure> (package:front_end/src/
api_prototype/kernel_generator.dart:61:35)
#29     Compiler
Context.runWithOptions.<anonymous closure> (package:front_end/sr
c/fasta/compiler_context.dart:135:20)
<asynchronous suspension>

#30     CompilerC
ontext.runInContext.<anonymous closure>.<anonymous closure> (pack
age:front_end/src/fasta/compiler_context.dart:123:
46)
#31     new Future.sync (dart:async/future.dar
t:224:31)
#32     CompilerContext.runInContext.<anonymous c
losure> (package:front_end/src/fasta/compiler_context.dart:123:1
9)
#33     _rootRun (dart:async/zone.dart:1126:13)
#34     _Cus
tomZone.run (dart:async/zone.dart:1023:19)
#35     _
runZoned (dart:async/zone.dart:1518:10)
#36     runZoned 
(dart:async/zone.dart:1465:12)
#37     CompilerContext.
runInContext (package:front_end/src/fasta/compiler_con
text.dart:122:12)
#38     CompilerContext.runWithOpt
ions (package:front_end/src/fasta/compiler_context.da
rt:133:10)
#39     kernelForProgramInternal (package:f
ront_end/src/api_prototype/kernel_generator.dart
:60:32)
#40     kernelForProgram (package:front_end/
src/api_prototype/kernel_generator.dart:52:17)
#
41     compileToKernel (package:vm/kernel_front_end.da
rt:319:41)
#42     FrontendCompiler.compile.<anonymou
s closure> (package:frontend_server/frontend_ser
ver.dart:452:54)
#43     new Future.<anonymous closure>
 (dart:async/future.dart:176:37)
#44     _rootRun
 (dart:async/zone.dart:1122:38)
#45     _CustomZon
e.run (dart:async/zone.dart:1023:19)
#46     _CustomZone.ru
nGuarded (dart:asyn
c/zone.dart:925:7)
#47     _CustomZone.bindCallbackGuarded.<a
nonymous closure> (dart:async/zone.dart:965:23)
#4
8     _rootRun (dart:async/zone.dart:1126:13)
#49   
  _CustomZone.run (dart:async/zone.dart:1023:19)
#
50     _CustomZone.bindCallback.<anonymous closure> (da
rt:async/zone.dart:949:23)
#51     Timer._createTimer.
<anonymous closure> (dart:async-patch/timer_patch.dart:23:15)
#52     _Timer._runTimers (dart:isolate-patch/timer_impl.dart:398:19)
#53     _Ti
mer._handleMessage (dart:isolate-patch/t
imer_impl.dart:429:5)
#54     _RawReceivePortImpl._handleMess
age (dart:isola
te-patch/isolate_patch.dart:168:12)


#0      Object.noSuchMet
hod (dart:core-patch/object_patch.dart:53:5)
#1      d
emoteTypeInLibrary (package:front_end/src/fasta/type_infe
rence/type_demotion.dart:65:14)
#2      TypeInferrerImpl.inferDec
larationType (package:fr
ont_end/src/fasta/type_inference/type_inferrer.dart:1889:
14)
#3      InferenceVis
itor.visitVariableDeclaration (package:front_end/src/fast
a/kernel/inference_visitor.dart:5337:31)
#4      Var
iableDeclaration.accept (package:kernel/ast.dart:549
5:43)
#5      TypeInferrerImpl.inferStatement (pack
age:front_end/src/fasta/type_inference/type_infe
rrer.dart:3245:24)
#6      InferenceVisitor._visitStatem
ents (package:front_end/src/fasta/kernel/inferen
ce_visitor.dart:299:20)
#7      InferenceVisitor.vi
sitBlock (package:front_end/src/fasta/kernel/inf
erence_visitor.dart:320:30)
#8      Block.accept (package:kernel/ast.dart:
4722:43)
#9      TypeInferrerIm
pl.inferStatement (package:front_end/src/fasta/type_inference/
type_inferrer.dart:3245:24)
#
10     TypeInferrerImpl.inferLocalFunction (package:f
ront_end/src/fasta/type_inference/type_inferrer.dart:
2595:43)
#11     InferenceVisitor.visi
tFunctionNode (package:fro
nt_end/src/fasta/kernel/inference_visitor.dart:1041:2
1)
#12     InferenceVisitor.visitFunctionExpr
ession (package:front_end/src/fas
ta/kernel/inference_visitor.dart:1065:9)
#13     FunctionExpression.accept1 (package:kernel/ast.dart:4523:9)
#
14     TypeInferrerImpl.inferExpression (package:front_end/src/fasta/type_inference/t
ype_inferrer.dart:1988:27)
#15     InferenceVisitor.inferMapEntry (package:front_en
d/src/fasta/kernel/inference_visitor.dart:1998:56)
#16     In
ferenceVisitor.visitMapLiteral (package:front_end/src/fas
ta/kernel/infe
rence_visitor.dart:2161:17)
#17     MapLiteral.accept1 (p
ackage:kernel/ast.dart:4431:9)
#18     TypeInferrerImp
l.inferExpression (package:front_end/src/fasta/type_infer
ence/type_inferrer.dart:1988:27)
#19     _ImplicitFieldT
ypeRoot.computeType (package:front_end/src/fasta/kern
el/implicit_field_type.dart:138:55)
#20     SourceFiel
dBuilder.inferType (package:front_end/src/fasta/buil
der/field_builder.dart:334:47)
#21     SourceLoader.per
formTopLevelInference (package:front_end/src/fasta/sou
rce/source_loader.dart:1109:35)
#22     KernelTarget.buildOu
tlines.<anonymous closure> (package:front_end/src/fa
sta/kernel/kernel_target.dart:312:14)
<asynchronous suspen
sion>
#23     withCrashReporting (package:front_end
/src/fasta/crash.dart:122:24)
#24     KernelTarget.build
Outlines (package:front_end/src/fasta/kernel/kernel_tar
get.dart:288:12)
#25     generateKernelInternal.<anonym
ous closure> (package:front_end/src/kernel_generator_imp
l.dart:108:28)
<asynchronous suspension>
#26     withCr
ashReporting (package:front_end/src/fasta/crash.dart
:122:24)
#27     generateKernelInternal (package:front_en
d/src/kernel_generator_impl.dart:70:10)
#28     ker
nelForProgramInternal.<anonymous closure> (package:fron
t_end/src/api_prototype/kernel_generator.dart:61:35)
#29
     CompilerContext.runWithOptions.<anonymous closure> (packa
ge:front_end/src/fasta/compiler_context.dart:135:20)
<asynchronous s
uspension>
#30     CompilerC
ontext.runInContext.<anonymous closure>.<anonymous closure> (packa
ge:front_end/src/fasta/compiler_context.dart:123:46)
#31     new Futur
e.sync (dart:async
/future.dart:224:31)
#32     CompilerContext.runInContext.<anonymous closur
e> (package:fr
ont_end/src/fasta/compiler_context.dart:123:19)
#33     _rootRun (dart:async
/zone.dart:1126:13)
#34     _
CustomZone.run (dart:async/zone.dart:1023:19)
#35     _runZoned (dart
:async/zone.dart:1518:10)
#36     runZoned (dart:async/zone.dart
:1465:12)
#37     CompilerContext.runInContext (package:front_end/
src/fasta/compiler_context.dart:122:12)
#38     CompilerContext.runWit
hOptions (package:front_end/src/fasta/compiler_context.dart:133:
10)
#39     kernelForProgramInternal (package:fr
ont_end/src/api_prototype/kernel_generator.dart:60:32)
#40     kernelForPr
ogram (package:front_end/src/api_prototype/kernel_generator.dart:52:17)
#41     compileToK
ernel (package:vm/kernel_front_end.dart:319:41)
#42     FrontendCompiler.compile.<anony
mous closure> (package:frontend_server/frontend_server.dart:452:54)
#43     new Futur
e.<anonymous closure> (dart:async/future.dart:176:37)
#44     _rootRun (dart:async/zo
ne.dart:1122:38)
#45     _CustomZone.run (dart:async/zone.dart:1023:19)
#46     _CustomZo
ne.runGuarded (dart:async/zone.dart:925:7)
#47     _CustomZone.bindCallbackGuarded.<anonymous closure> (dart:async/zone.dart:965:23)
#48     _root
Run (dart:async/zone.dart:1126:13)
#49     _CustomZone.run (dart:async/zone.dart:1023:19)
#50     _CustomZone.bindCallback.<anonymous closure> (dart:async/zone.dart:949:23)
#51     Timer._createTimer.<a
nonymous closure> (dart:async-patch/timer_patch.dart:23:15)
#52     _Timer._runTimers (dart:isolate-pa
tch/timer_impl.dart:398:19)
#53     _Timer._handleMessage (dart:isolate-patch/timer_impl.dart:
429:5)
#54     _RawReceivePortImpl._handleMessage (dart:isolate-patch/isolate_patch.dart:168:12)

Target kernel_snapshot failed: Exception: Errors during snapshot creation: null
build failed.

FAILURE: Build failed with an exception.

* Where:
Script 'D:\src\flutter\packages\flutter_tools\gradle\flutter.gradle' line: 817

* What went wrong:
Execution failed for task ':app:compileFlutterBuildDebug'.
> Process 'command 'D:\src\flutter\bin\flutter.bat'' finished with non-zero exit value 1

* Try:
Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output. Run with --scan to get full insights.

* Get more help at https://help.gradle.org

BUILD FAILED in 9s
Finished with error: Gradle task assembleDebug failed with exit code 1

flutter_windows_v1.12.13+hotfix.8-stable では発生しません。

dart, add XmlElement

dart, flutter で XmlElementを追加する方法です。

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EnlighterJS 3 Syntax Highlighter
import 'package:flutter/material.dart';
import 'package:xml/xml.dart' as xml;
import 'dart:async';
import 'dart:io';
import 'dart:core';
var bookshelfXml = '''<?xml version="1.0"?>
<bookshelf>
<book>
<title lang="english">Growing a Language</title>
<price>29.99</price>
</book>
<book>
<title lang="english">Learning XML</title>
<price>39.95</price>
</book>
</bookshelf>''';
var document = xml.parse(bookshelfXml);
var element_book = xml.XmlElement(xml.XmlName('book'));
var element_title = xml.xmlElement(xml.XmlName('title'))..attributes.add(xml.XmlAttribute(xml.XmlName('lang'), 'english'))..children.add(xml.XmlText('My book'));
var element_price = xml.XmlElement(xml.XmlName('price'))..children.add(xml.XmlText('19.95'));
element_book..children.add(element_title);
element_book..children.add(element_price);
document.rootElement.children.add(element_book);
import 'package:flutter/material.dart'; import 'package:xml/xml.dart' as xml; import 'dart:async'; import 'dart:io'; import 'dart:core'; var bookshelfXml = '''<?xml version="1.0"?> <bookshelf> <book> <title lang="english">Growing a Language</title> <price>29.99</price> </book> <book> <title lang="english">Learning XML</title> <price>39.95</price> </book> </bookshelf>'''; var document = xml.parse(bookshelfXml); var element_book = xml.XmlElement(xml.XmlName('book')); var element_title = xml.xmlElement(xml.XmlName('title'))..attributes.add(xml.XmlAttribute(xml.XmlName('lang'), 'english'))..children.add(xml.XmlText('My book')); var element_price = xml.XmlElement(xml.XmlName('price'))..children.add(xml.XmlText('19.95')); element_book..children.add(element_title); element_book..children.add(element_price); document.rootElement.children.add(element_book);
import 'package:flutter/material.dart';
import 'package:xml/xml.dart' as xml;
import 'dart:async';
import 'dart:io';
import 'dart:core';

var bookshelfXml = '''<?xml version="1.0"?>
    <bookshelf>
      <book>
        <title lang="english">Growing a Language</title>
        <price>29.99</price>
      </book>
      <book>
        <title lang="english">Learning XML</title>
        <price>39.95</price>
      </book>
    </bookshelf>''';
var document = xml.parse(bookshelfXml);

var element_book = xml.XmlElement(xml.XmlName('book'));
var element_title = xml.xmlElement(xml.XmlName('title'))..attributes.add(xml.XmlAttribute(xml.XmlName('lang'), 'english'))..children.add(xml.XmlText('My book'));
var element_price = xml.XmlElement(xml.XmlName('price'))..children.add(xml.XmlText('19.95'));
element_book..children.add(element_title);
element_book..children.add(element_price);
document.rootElement.children.add(element_book);

この方法でbook要素に title が My book, price が 19.95 の book が追加されます。

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EnlighterJS 3 Syntax Highlighter
<?xml version="1.0"?>
<bookshelf>
<book>
<title lang="english">Growing a Language</title>
<price>29.99</price>
</book>
<book>
<title lang="english">Learning XML</title>
<price>39.95</price>
</book>
<book>
<title lang="english">My book</title>
<price>19.95</price>
</book>
</bookshelf>
<?xml version="1.0"?> <bookshelf> <book> <title lang="english">Growing a Language</title> <price>29.99</price> </book> <book> <title lang="english">Learning XML</title> <price>39.95</price> </book> <book> <title lang="english">My book</title> <price>19.95</price> </book> </bookshelf>
<?xml version="1.0"?>
    <bookshelf>
      <book>
        <title lang="english">Growing a Language</title>
        <price>29.99</price>
      </book>
      <book>
        <title lang="english">Learning XML</title>
        <price>39.95</price>
      </book>
      <book>
        <title lang="english">My book</title>
        <price>19.95</price>
      </book>
    </bookshelf>

children.add に別のXmlDocumentのXmlNode, XmlElement などを配置すると例外が発生します。xml.XmlElement(xml.XmlName(“book”)) 等で生成または、xml.XmlElement.copy() を使用する必要があります。

Call Kotlin method from Flutter(FlutterからKotlinのコード内のメソッドを呼び出す)

MainActivity.kt (Kotlin)

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EnlighterJS 3 Syntax Highlighter
package (your.app)
import android.content.res.Configuration
import android.os.Bundle
import android.os.PersistableBundle
import androidx.annotation.NonNull
import io.flutter.embedding.android.FlutterActivity
import io.flutter.embedding.engine.FlutterEngine
import io.flutter.plugins.GeneratedPluginRegistrant
import io.flutter.embedding.android.FlutterFragment
import io.flutter.plugin.common.MethodCall
import io.flutter.plugin.common.MethodChannel
import io.flutter.plugin.common.MethodChannel.MethodCallHandler
import io.flutter.plugin.common.MethodChannel.Result
import io.flutter.plugin.platform.PlatformViewsController
class MainActivity: FlutterActivity() {
override fun configureFlutterEngine(@NonNull flutterEngine: FlutterEngine) {
GeneratedPluginRegistrant.registerWith(flutterEngine)
MethodChannel(flutterEngine.dartExecutor, CHANNEL).setMethodCallHandler { methodCall, result ->
val args = methodCall.arguments
when (methodCall.method) {
"method1" -> {
val number = 10
result.success(number)
}
}
}
}
companion object {
private val CHANNEL = "com.your.app.flutter/method1"
}
}
package (your.app) import android.content.res.Configuration import android.os.Bundle import android.os.PersistableBundle import androidx.annotation.NonNull import io.flutter.embedding.android.FlutterActivity import io.flutter.embedding.engine.FlutterEngine import io.flutter.plugins.GeneratedPluginRegistrant import io.flutter.embedding.android.FlutterFragment import io.flutter.plugin.common.MethodCall import io.flutter.plugin.common.MethodChannel import io.flutter.plugin.common.MethodChannel.MethodCallHandler import io.flutter.plugin.common.MethodChannel.Result import io.flutter.plugin.platform.PlatformViewsController class MainActivity: FlutterActivity() { override fun configureFlutterEngine(@NonNull flutterEngine: FlutterEngine) { GeneratedPluginRegistrant.registerWith(flutterEngine) MethodChannel(flutterEngine.dartExecutor, CHANNEL).setMethodCallHandler { methodCall, result -> val args = methodCall.arguments when (methodCall.method) { "method1" -> { val number = 10 result.success(number) } } } } companion object { private val CHANNEL = "com.your.app.flutter/method1" } }
package (your.app)

import android.content.res.Configuration
import android.os.Bundle
import android.os.PersistableBundle
import androidx.annotation.NonNull
import io.flutter.embedding.android.FlutterActivity
import io.flutter.embedding.engine.FlutterEngine
import io.flutter.plugins.GeneratedPluginRegistrant

import io.flutter.embedding.android.FlutterFragment
import io.flutter.plugin.common.MethodCall
import io.flutter.plugin.common.MethodChannel

import io.flutter.plugin.common.MethodChannel.MethodCallHandler
import io.flutter.plugin.common.MethodChannel.Result

import io.flutter.plugin.platform.PlatformViewsController


class MainActivity: FlutterActivity() {
    override fun configureFlutterEngine(@NonNull flutterEngine: FlutterEngine) {
        GeneratedPluginRegistrant.registerWith(flutterEngine)

        MethodChannel(flutterEngine.dartExecutor, CHANNEL).setMethodCallHandler { methodCall, result ->
            val args = methodCall.arguments
            when (methodCall.method) {
                "method1" -> {
                    val number = 10
                    result.success(number)
                }
            }
        }
    }

    companion object {
        private val CHANNEL = "com.your.app.flutter/method1"
    }

}

Dart

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static const platform = const MethodChannel('com.your.app.flutter/method1');
Future<void> _Method1() async{
int _number;
try {
final int result = await platform.invokeMethod('method1');
_number = result;
setState(() {
number = _number;
});
} on PlatformException catch (e)
{
setState(() {
number = -1;
});
}
}
int number;
Widget ShowNumber()
{
Text(number.toString());
}
static const platform = const MethodChannel('com.your.app.flutter/method1'); Future<void> _Method1() async{ int _number; try { final int result = await platform.invokeMethod('method1'); _number = result; setState(() { number = _number; }); } on PlatformException catch (e) { setState(() { number = -1; }); } } int number; Widget ShowNumber() { Text(number.toString()); }
static const platform = const MethodChannel('com.your.app.flutter/method1');

Future<void> _Method1() async{
    int _number;
    try {
      final int result = await platform.invokeMethod('method1');
      _number = result;

      setState(() {
        number = _number;
      });

    } on PlatformException catch (e)
    {
      setState(() {
        number = -1;
      });
    }
}

int number;

Widget ShowNumber()
{
  Text(number.toString());
}

_Method1() を呼び出すと Kotlin側のmethod1 -> {} が実行され、結果が Flutter側の result に戻ります。

String testString = “abc”;
platform.invokeMethod(‘method1’, testString); でtestStringを引数にできます。
Kotlin側の methodCall.arguments で引数を取得できます。

io.flutter.app.FlutterActivity の FlutterActivity には FlutterEngine が存在しないのでGeneratedPluginRegistrant.registerWith(this) ではregistできません。またMethodCall の flutterView の代わり(java では getFlutterView() )に flutterEngine.dartExecutor を使用します。

2019-12-05の時点で app/build.gradle 内で Cannot resolve symbol ‘GradleException’ が、MainActivity.kt で Unresolved reference: NonNull がそれぞれ赤字で表示されます。2019-12-07のAndroid Studio アップデートとFlutter Pluginのアップデートで表示されなくなったようです。

GradleException, androidx.annotation.NonNull
Kotlin Complier の Kotlin JVM Version を 1.6 から 1.8 に変更したところエラーがなくなりました。

こちらのサイトの情報が参考になりました。

https://github.com/flutter/flutter/issues/41102
https://qiita.com/tasogarei/items/bf3761139d46c43d5896
https://qiita.com/unsoluble_sugar/items/ae42b5faf52a491f6470
https://flutter.keicode.com/basics/method-channel-java.php