Red Cape提出的问题

Red Cape

Asked: 2024-09-04 19:57:30 +0800 CST

连接Allure报告时软件渲染不支持硬件位图

5

Software rendering doesn't support hardware bitmaps当我尝试为步态报告制作屏幕截图时，我开始在一些测试中发现错误 ( )

我这样连接步态：

kaspressoBuilder = Kaspresso.Builder.withForcedAllureSupport().addComposeSupport

完整错误：

java.lang.IllegalArgumentException: Software rendering doesn't support hardware bitmaps
at android.graphics.BaseCanvas.throwIfHwBitmapInSwMode(BaseCanvas.java:706)
at android.graphics.BaseCanvas.throwIfCannotDraw(BaseCanvas.java:81)
at android.graphics.BaseCanvas.drawBitmap(BaseCanvas.java:139)
at android.graphics.Canvas.drawBitmap(Canvas.java:1604)
at androidx.compose.ui.graphics.AndroidCanvas.drawImageRect-HPBpro0(AndroidCanvas.android.kt:271)
at androidx.compose.ui.graphics.drawscope.CanvasDrawScope.drawImage-AZ2fEMs(CanvasDrawScope.kt:263)
at androidx.compose.ui.node.LayoutNodeDrawScope.drawImage-AZ2fEMs(Unknown Source:39)
at androidx.compose.ui.graphics.drawscope.DrawScope.drawImage-AZ2fEMs$default(DrawScope.kt:510)
at androidx.compose.ui.graphics.painter.BitmapPainter.onDraw(BitmapPainter.kt:93)
at androidx.compose.ui.graphics.painter.Painter.draw-x_KDEd0(Painter.kt:212)
at coil.compose.AsyncImagePainter.onDraw(AsyncImagePainter.kt:210)
at androidx.compose.ui.graphics.painter.Painter.draw-x_KDEd0(Painter.kt:212)
at androidx.compose.ui.draw.PainterModifier.draw(PainterModifier.kt:281)
at androidx.compose.ui.node.BackwardsCompatNode.draw(BackwardsCompatNode.kt:381)
at androidx.compose.ui.node.LayoutNodeDrawScope.draw-x_KDEd0$ui_release(LayoutNodeDrawScope.kt:92)
at androidx.compose.ui.node.NodeCoordinator.drawContainedDrawModifiers(NodeCoordinator.kt:371)
at androidx.compose.ui.node.NodeCoordinator.draw(NodeCoordinator.kt:360)
at androidx.compose.ui.node.LayoutModifierNodeCoordinator.performDraw(LayoutModifierNodeCoordinator.kt:236)
at androidx.compose.ui.node.NodeCoordinator.drawContainedDrawModifiers(NodeCoordinator.kt:368)
at androidx.compose.ui.node.NodeCoordinator.access$drawContainedDrawModifiers(NodeCoordinator.kt:58)
at androidx.compose.ui.node.NodeCoordinator$invoke$1.invoke(NodeCoordinator.kt:397)
at androidx.compose.ui.node.NodeCoordinator$invoke$1.invoke(NodeCoordinator.kt:396)
at androidx.compose.runtime.snapshots.Snapshot$Companion.observe(Snapshot.kt:2139)
at androidx.compose.runtime.snapshots.SnapshotStateObserver$observeReads$1$1.invoke(SnapshotStateObserver.kt:130)
at androidx.compose.runtime.snapshots.SnapshotStateObserver$observeReads$1$1.invoke(SnapshotStateObserver.kt:126)
at androidx.compose.runtime.SnapshotStateKt__DerivedStateKt.observeDerivedStateRecalculations(DerivedState.kt:341)
at androidx.compose.runtime.SnapshotStateKt.observeDerivedStateRecalculations(Unknown Source:1)
at androidx.compose.runtime.snapshots.SnapshotStateObserver.observeReads(SnapshotStateObserver.kt:126)
at androidx.compose.ui.node.OwnerSnapshotObserver.observeReads$ui_release(OwnerSnapshotObserver.kt:120)
at androidx.compose.ui.node.NodeCoordinator.invoke(NodeCoordinator.kt:396)
at androidx.compose.ui.node.NodeCoordinator.invoke(NodeCoordinator.kt:58)
at androidx.compose.ui.platform.RenderNodeLayer.drawLayer(RenderNodeLayer.android.kt:273)
at androidx.compose.ui.node.NodeCoordinator.draw(NodeCoordinator.kt:355)
at androidx.compose.ui.node.LayoutModifierNodeCoordinator.performDraw(LayoutModifierNodeCoordinator.kt:236)
at androidx.compose.ui.node.NodeCoordinator.drawContainedDrawModifiers(NodeCoordinator.kt:368)
at androidx.compose.ui.node.NodeCoordinator.draw(NodeCoordinator.kt:360)
at androidx.compose.ui.node.LayoutModifierNodeCoordinator.performDraw(LayoutModifierNodeCoordinator.kt:236)
at androidx.compose.ui.node.NodeCoordinator.drawContainedDrawModifiers(NodeCoordinator.kt:368)
at androidx.compose.ui.node.NodeCoordinator.draw(NodeCoordinator.kt:360)
at androidx.compose.ui.node.LayoutNode.draw$ui_release(LayoutNode.kt:840)
at androidx.compose.ui.node.InnerNodeCoordinator.performDraw(InnerNodeCoordinator.kt:151)
at androidx.compose.ui.node.NodeCoordinator.drawContainedDrawModifiers(NodeCoordinator.kt:368)
at androidx.compose.ui.node.NodeCoordinator.draw(NodeCoordinator.kt:360)
at androidx.compose.ui.node.LayoutModifierNodeCoordinator.performDraw(LayoutModifierNodeCoordinator.kt:236)
at androidx.compose.ui.node.NodeCoordinator.drawContainedDrawModifiers(NodeCoordinator.kt:368)
at androidx.compose.ui.node.NodeCoordinator.draw(NodeCoordinator.kt:360)
at androidx.compose.ui.node.LayoutModifierNodeCoordinator.performDraw(LayoutModifierNodeCoordinator.kt:236)
at androidx.compose.ui.node.NodeCoordinator.drawContainedDrawModifiers(NodeCoordinator.kt:368)
at androidx.compose.ui.node.NodeCoordinator.draw(NodeCoordinator.kt:360)
at androidx.compose.ui.node.LayoutNode.draw$ui_release(LayoutNode.kt:840)
at androidx.compose.ui.node.InnerNodeCoordinator.performDraw(InnerNodeCoordinator.kt:151)
at androidx.compose.ui.node.LayoutNodeDrawScope.drawContent(LayoutNodeDrawScope.kt:64)
at androidx.compose.material.ripple.AndroidRippleIndicationInstance.drawIndication(Ripple.android.kt:184)
at androidx.compose.foundation.IndicationModifier.draw(Indication.kt:183)
at androidx.compose.ui.node.BackwardsCompatNode.draw(BackwardsCompatNode.kt:381)
at androidx.compose.ui.node.LayoutNodeDrawScope.draw-x_KDEd0$ui_release(LayoutNodeDrawScope.kt:92)
at androidx.compose.ui.node.LayoutNodeDrawScope.performDraw(LayoutNodeDrawScope.kt:74)
at androidx.compose.ui.node.LayoutNodeDrawScope.drawContent(LayoutNodeDrawScope.kt:54)
at androidx.compose.foundation.Background.draw(Background.kt:107)
at androidx.compose.ui.node.BackwardsCompatNode.draw(BackwardsCompatNode.kt:381)
at androidx.compose.ui.node.LayoutNodeDrawScope.draw-x_KDEd0$ui_release(LayoutNodeDrawScope.kt:92)
at androidx.compose.ui.node.NodeCoordinator.drawContainedDrawModifiers(NodeCoordinator.kt:371)
at androidx.compose.ui.node.NodeCoordinator.access$drawContainedDrawModifiers(NodeCoordinator.kt:58)
at androidx.compose.ui.node.NodeCoordinator$invoke$1.invoke(NodeCoordinator.kt:397)
at androidx.compose.ui.node.NodeCoordinator$invoke$1.invoke(NodeCoordinator.kt:396)
at androidx.compose.runtime.snapshots.Snapshot$Companion.observe(Snapshot.kt:2139)
at androidx.compose.runtime.snapshots.SnapshotStateObserver$observeReads$1$1.invoke(SnapshotStateObserver.kt:130)
at androidx.compose.runtime.snapshots.SnapshotStateObserver$observeReads$1$1.invoke(SnapshotStateObserver.kt:126)
at androidx.compose.runtime.SnapshotStateKt__DerivedStateKt.observeDerivedStateRecalculations(DerivedState.kt:341)
at androidx.compose.runtime.SnapshotStateKt.observeDerivedStateRecalculations(Unknown Source:1)
at androidx.compose.runtime.snapshots.SnapshotStateObserver.observeReads(SnapshotStateObserver.kt:126)
at androidx.compose.ui.node.OwnerSnapshotObserver.observeReads$ui_release(OwnerSnapshotObserver.kt:120)
at androidx.compose.ui.node.NodeCoordinator.invoke(NodeCoordinator.kt:396)
at androidx.compose.ui.node.NodeCoordinator.invoke(NodeCoordinator.kt:58)
at androidx.compose.ui.platform.RenderNodeLayer.drawLayer(RenderNodeLayer.android.kt:273)
at androidx.compose.ui.node.NodeCoordinator.draw(NodeCoordinator.kt:355)
at androidx.compose.ui.node.LayoutModifierNodeCoordinator.performDraw(LayoutModifierNodeCoordinator.kt:236)
at androidx.compose.ui.node.NodeCoordinator.drawContainedDrawModifiers(NodeCoordinator.kt:368)
at androidx.compose.ui.node.NodeCoordinator.draw(NodeCoordinator.kt:360)
at androidx.compose.ui.node.LayoutModifierNodeCoordinator.performDraw(LayoutModifierNodeCoordinator.kt:236)
at androidx.compose.ui.node.NodeCoordinator.drawContainedDrawModifiers(NodeCoordinator.kt:368)
at androidx.compose.ui.node.NodeCoordinator.draw(NodeCoordinator.kt:360)
at androidx.compose.ui.node.LayoutModifierNodeCoordinator.performDraw(LayoutModifierNodeCoordinator.kt:236)
at androidx.compose.ui.node.NodeCoordinator.drawContainedDrawModifiers(NodeCoordinator.kt:368)
at androidx.compose.ui.node.NodeCoordinator.draw(NodeCoordinator.kt:360)
at androidx.compose.ui.node.LayoutModifierNodeCoordinator.performDraw(LayoutModifierNodeCoordinator.kt:236)
at androidx.compose.ui.node.NodeCoordinator.drawContainedDrawModifiers(NodeCoordinator.kt:368)
at androidx.compose.ui.node.NodeCoordinator.draw(NodeCoordinator.kt:360)
at androidx.compose.ui.node.LayoutNode.draw$ui_release(LayoutNode.kt:840)
at androidx.compose.ui.node.InnerNodeCoordinator.performDraw(InnerNodeCoordinator.kt:151)
at androidx.compose.ui.node.NodeCoordinator.drawContainedDrawModifiers(NodeCoordinator.kt:368)
at androidx.compose.ui.node.NodeCoordinator.access$drawContainedDrawModifiers(NodeCoordinator.kt:58)
at androidx.compose.ui.node.NodeCoordinator$invoke$1.invoke(NodeCoordinator.kt:397)
at androidx.compose.ui.node.NodeCoordinator$invoke$1.invoke(NodeCoordinator.kt:396)
at androidx.compose.runtime.snapshots.Snapshot$Companion.observe(Snapshot.kt:2139)
at androidx.compose.runtime.snapshots.SnapshotStateObserver$observeReads$1$1.invoke(SnapshotStateObserver.kt:130)
at androidx.compose.runtime.snapshots.SnapshotStateObserver$observeReads$1$1.invoke(SnapshotStateObserver.kt:126)
at androidx.compose.runtime.SnapshotStateKt__DerivedStateKt.observeDerivedStateRecalculations(DerivedState.kt:341)
at androidx.compose.runtime.SnapshotStateKt.observeDerivedStateRecalculations(Unknown Source:1)
at androidx.compose.runtime.snapshots.SnapshotStateObserver.observeReads(SnapshotStateObserver.kt:126)
at androidx.compose.ui.node.OwnerSnapshotObserver.observeReads$ui_release(OwnerSnapshotObserver.kt:120)
at androidx.compose.ui.node.NodeCoordinator.invoke(NodeCoordinator.kt:396)
at androidx.compose.ui.node.NodeCoordinator.invoke(NodeCoordinator.kt:58)
at androidx.compose.ui.platform.RenderNodeLayer.drawLayer(RenderNodeLayer.android.kt:273)
at androidx.compose.ui.node.NodeCoordinator.draw(NodeCoordinator.kt:355)
at androidx.compose.ui.node.LayoutNode.draw$ui_release(LayoutNode.kt:840)
at androidx.compose.ui.node.InnerNodeCoordinator.performDraw(InnerNodeCoordinator.kt:151)
at androidx.compose.ui.node.LayoutNodeDrawScope.drawContent(LayoutNodeDrawScope.kt:64)
at androidx.compose.foundation.DrawOverscrollModifier.draw(AndroidOverscroll.kt:81)
at androidx.compose.ui.node.BackwardsCompatNode.draw(BackwardsCompatNode.kt:381)
at androidx.compose.ui.node.LayoutNodeDrawScope.draw-x_KDEd0$ui_release(LayoutNodeDrawScope.kt:92)
at androidx.compose.ui.node.NodeCoordinator.drawContainedDrawModifiers(NodeCoordinator.kt:371)
at androidx.compose.ui.node.NodeCoordinator.draw(NodeCoordinator.kt:360)
at androidx.compose.ui.node.LayoutModifierNodeCoordinator.performDraw(LayoutModifierNodeCoordinator.kt:236)
at androidx.compose.ui.node.NodeCoordinator.drawContainedDrawModifiers(NodeCoordinator.kt:368)
at androidx.compose.ui.node.NodeCoordinator.access$drawContainedDrawModifiers(NodeCoordinator.kt:58)
at androidx.compose.ui.node.NodeCoordinator$invoke$1.invoke(NodeCoordinator.kt:397)
at androidx.compose.ui.node.NodeCoordinator$invoke$1.invoke(NodeCoordinator.kt:396)
at androidx.compose.runtime.snapshots.Snapshot$Companion.observe(Snapshot.kt:2139)
at androidx.compose.runtime.snapshots.SnapshotStateObserver$observeReads$1$1.invoke(SnapshotStateObserver.kt:130)
at androidx.compose.runtime.snapshots.SnapshotStateObserver$observeReads$1$1.invoke(SnapshotStateObserver.kt:126)
at androidx.compose.runtime.SnapshotStateKt__DerivedStateKt.observeDerivedStateRecalculations(DerivedState.kt:341)
at androidx.compose.runtime.SnapshotStateKt.observeDerivedStateRecalculations(Unknown Source:1)
at androidx.compose.runtime.snapshots.SnapshotStateObserver.observeReads(SnapshotStateObserver.kt:126)
at androidx.compose.ui.node.OwnerSnapshotObserver.observeReads$ui_release(OwnerSnapshotObserver.kt:120)
at androidx.compose.ui.node.NodeCoordinator.invoke(NodeCoordinator.kt:396)
at androidx.compose.ui.node.NodeCoordinator.invoke(NodeCoordinator.kt:58)
at androidx.compose.ui.platform.RenderNodeLayer.drawLayer(RenderNodeLayer.android.kt:273)
at androidx.compose.ui.node.NodeCoordinator.draw(NodeCoordinator.kt:355)
at androidx.compose.ui.node.LayoutModifierNodeCoordinator.performDraw(LayoutModifierNodeCoordinator.kt:236)
at androidx.compose.ui.node.NodeCoordinator.drawContainedDrawModifiers(NodeCoordinator.kt:368)
at androidx.compose.ui.node.NodeCoordinator.access$drawContainedDrawModifiers(NodeCoordinator.kt:58)
at androidx.compose.ui.node.NodeCoordinator$invoke$1.invoke(NodeCoordinator.kt:397)
at androidx.compose.ui.node.NodeCoordinator$invoke$1.invoke(NodeCoordinator.kt:396)
at androidx.compose.runtime.snapshots.Snapshot$Companion.observe(Snapshot.kt:2139)
at androidx.compose.runtime.snapshots.SnapshotStateObserver$observeReads$1$1.invoke(SnapshotStateObserver.kt:130)
at androidx.compose.runtime.snapshots.SnapshotStateObserver$observeReads$1$1.invoke(SnapshotStateObserver.kt:126)
at androidx.compose.runtime.SnapshotStateKt__DerivedStateKt.observeDerivedStateRecalculations(DerivedState.kt:341)
at androidx.compose.runtime.SnapshotStateKt.observeDerivedStateRecalculations(Unknown Source:1)
at androidx.compose.runtime.snapshots.SnapshotStateObserver.observeReads(SnapshotStateObserver.kt:126)
at androidx.compose.ui.node.OwnerSnapshotObserver.observeReads$ui_release(OwnerSnapshotObserver.kt:120)
at androidx.compose.ui.node.NodeCoordinator.invoke(NodeCoordinator.kt:396)
at androidx.compose.ui.node.NodeCoordinator.invoke(NodeCoordinator.kt:58)
at androidx.compose.ui.platform.RenderNodeLayer.drawLayer(RenderNodeLayer.android.kt:273)
at androidx.compose.ui.node.NodeCoordinator.draw(NodeCoordinator.kt:355)
at androidx.compose.ui.node.LayoutModifierNodeCoordinator.performDraw(LayoutModifierNodeCoordinator.kt:236)
at androidx.compose.ui.node.NodeCoordinator.drawContainedDrawModifiers(NodeCoordinator.kt:368)
at androidx.compose.ui.node.NodeCoordinator.draw(NodeCoordinator.kt:360)
at androidx.compose.ui.node.LayoutModifierNodeCoordinator.performDraw(LayoutModifierNodeCoordinator.kt:236)
at androidx.compose.ui.node.NodeCoordinator.drawContainedDrawModifiers(NodeCoordinator.kt:368)
at androidx.compose.ui.node.NodeCoordinator.draw(NodeCoordinator.kt:360)
at androidx.compose.ui.node.LayoutNode.draw$ui_release(LayoutNode.kt:840)
at androidx.compose.ui.node.InnerNodeCoordinator.performDraw(InnerNodeCoordinator.kt:151)
at androidx.compose.ui.node.LayoutNodeDrawScope.drawContent(LayoutNodeDrawScope.kt:64)
at androidx.compose.foundation.Background.draw(Background.kt:107)
at androidx.compose.ui.node.BackwardsCompatNode.draw(BackwardsCompatNode.kt:381)
at androidx.compose.ui.node.LayoutNodeDrawScope.draw-x_KDEd0$ui_release(LayoutNodeDrawScope.kt:92)
at androidx.compose.ui.node.NodeCoordinator.drawContainedDrawModifiers(NodeCoordinator.kt:371)
at androidx.compose.ui.node.NodeCoordinator.draw(NodeCoordinator.kt:360)
at androidx.compose.ui.node.LayoutModifierNodeCoordinator.performDraw(LayoutModifierNodeCoordinator.kt:236)
at androidx.compose.ui.node.NodeCoordinator.drawContainedDrawModifiers(NodeCoordinator.kt:368)
at androidx.compose.ui.node.NodeCoordinator.access$drawContainedDrawModifiers(NodeCoordinator.kt:58)
at androidx.compose.ui.node.NodeCoordinator$invoke$1.invoke(NodeCoordinator.kt:397)
at androidx.compose.ui.node.NodeCoordinator$invoke$1.invoke(NodeCoordinator.kt:396)
at androidx.compose.runtime.snapshots.Snapshot$Companion.observe(Snapshot.kt:2139)
at androidx.compose.runtime.snapshots.SnapshotStateObserver$observeReads$1$1.invoke(SnapshotStateObserver.kt:130)
at androidx.compose.runtime.snapshots.SnapshotStateObserver$observeReads$1$1.invoke(SnapshotStateObserver.kt:126)
at androidx.compose.runtime.SnapshotStateKt__DerivedStateKt.observeDerivedStateRecalculations(DerivedState.kt:341)
at androidx.compose.runtime.SnapshotStateKt.observeDerivedStateRecalculations(Unknown Source:1)
at androidx.compose.runtime.snapshots.SnapshotStateObserver.observeReads(SnapshotStateObserver.kt:126)
at androidx.compose.ui.node.OwnerSnapshotObserver.observeReads$ui_release(OwnerSnapshotObserver.kt:120)
at androidx.compose.ui.node.NodeCoordinator.invoke(NodeCoordinator.kt:396)
at androidx.compose.ui.node.NodeCoordinator.invoke(NodeCoordinator.kt:58)
at androidx.compose.ui.platform.RenderNodeLayer.drawLayer(RenderNodeLayer.android.kt:273)
at androidx.compose.ui.node.NodeCoordinator.draw(NodeCoordinator.kt:355)
at androidx.compose.ui.node.LayoutNode.draw$ui_release(LayoutNode.kt:840)
at androidx.compose.ui.node.InnerNodeCoordinator.performDraw(InnerNodeCoordinator.kt:151)
at androidx.compose.ui.node.NodeCoordinator.drawContainedDrawModifiers(NodeCoordinator.kt)

Red Cape

Asked: 2022-04-05 01:33:27 +0800 CST

扑。如何在 UI 中显示 Future<List<Product>>

0

有一个带有请求的方法：

Future<List<Product>> fetchAlbum() async {
  final response = await http
      .get(Uri.parse('https://fakestoreapi.com/products'));
  if (response.statusCode == 200) {
    Iterable l = json.decode(response.body);
    List<Product> products= List<Product>.from(l.map((i) => Product.fromJson(i)));
    return products;
  } else {
    throw Exception('Failed to load album');
  }
}

它返回来自假商店的产品列表：https ://fakestoreapi.com/

例如，如何显示title第二个元素？布局：

@override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Fetch Data Example',
      theme: ThemeData(
        primarySwatch: Colors.blue,
      ),
      home: Scaffold(
        appBar: AppBar(
          title: const Text('Fetch Data Example'),
        ),
        body: Center(
          child: FutureBuilder<Product>(
            future: futureAlbum,
            builder: (context, snapshot) {
              if (snapshot.hasData) {
                return Text(snapshot.data.title);
              } else if (snapshot.hasError) {
                return Text('${snapshot.error}');
              }
              // By default, show a loading spinner.
              return const CircularProgressIndicator();
            },
          ),
        ),
      ),
    );
  }
}

一个东西：

class Product {
  final int id;
  final String title, description, category;
  final double price;
  final String image;
  final Map rating;

  Product({
    @required this.id,
    @required this.title,
    @required this.description,
    @required this.category,
    @required this.price,
    @required this.image,
    @required this.rating
  });

  factory Product.fromJson(Map<String, dynamic> json) {
    return Product(
      id: json['id'],
      title: json['title'],
      description: json['description'],
      category: json['category'],
      price: json['price'],
      image: json['image'],
      rating: json['rating'],
    );
  }
}

Red Cape

Asked: 2022-04-09 00:08:57 +0800 CST

android布局看不到activity.kt文件，需要java文件

0

这是布局：

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MainActivity">

    <ScrollView
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent">
        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:orientation="vertical">



            <LinearLayout
                android:id="@+id/linearLayout"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_marginStart="4dp"
                android:layout_marginTop="2dp"
                android:layout_marginEnd="4dp"
                android:orientation="horizontal"
                app:layout_constraintEnd_toEndOf="parent"
                app:layout_constraintStart_toStartOf="parent"
                app:layout_constraintTop_toTopOf="parent">

                <Button
                    android:id="@+id/btn_text"
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    android:layout_weight="1"
                    android:text="Generate QR"
                    android:textAllCaps="false" />

            </LinearLayout>

            <RelativeLayout
                android:id="@+id/relativeLayout"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_marginStart="4dp"
                android:layout_marginTop="2dp"
                android:layout_marginEnd="4dp"
                app:layout_constraintEnd_toEndOf="parent"
                app:layout_constraintStart_toStartOf="parent"
                app:layout_constraintTop_toBottomOf="@+id/linearLayout">



                <EditText
                    android:id="@+id/input_text"
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    android:ems="10"
                    android:inputType="text"
                    android:hint="Enter text here"
                    android:visibility="gone"

                    />

            </RelativeLayout>
            <Button
                android:id="@+id/btn_generateQR"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:text="Generate QR code"
                android:textAllCaps="false"
                android:visibility="gone"/>


            <ImageView
                android:id="@+id/imageView_qrCode"
                android:layout_gravity="center"
                android:layout_width="250dp"
                android:layout_height="250dp"
                android:layout_marginBottom="2dp"
                android:layout_marginTop="2dp"
                app:layout_constraintBottom_toBottomOf="parent"
                app:layout_constraintEnd_toEndOf="parent"
                app:layout_constraintStart_toStartOf="parent"
                app:layout_constraintTop_toBottomOf="@+id/relativeLayout"
                />

            <Button
                android:id="@+id/btn_save"
                android:layout_width="200dp"
                android:layout_height="wrap_content"
                android:text="Save to gallery"
                android:textAllCaps="false"
                android:layout_gravity="center"
                android:visibility="gone"/>
        </LinearLayout>
    </ScrollView>


</androidx.constraintlayout.widget.ConstraintLayout>

这是激活：

class MainActivity : AppCompatActivity(), View.OnClickListener {

    private var qrImage : Bitmap? = null
    val EXTERNAL_STORAGE_PERMISSION_REQUEST_CODE = 1

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)
        btn_text.setOnClickListener(this)
        btn_save.setOnClickListener(this)
        btn_generateQR.setOnClickListener(this)


        if (!checkPermissionForExternalStorage()) {
            requestPermissionForExternalStorage()
        }
    }

    override fun onClick(v: View?) {
        when(v?.id)
        {
            R.id.btn_text->
            {
                generateQRCode()
            }
        }
    }

    fun generateQRCode()
    {
        val newUUID = UUID.randomUUID()
        qrImage = net.glxn.qrgen.android.QRCode.from(newUUID.toString()).bitmap()
        if(qrImage != null) {
            var reqParam = URLEncoder.encode("qr", "UTF-8") + "=" + URLEncoder.encode(newUUID.toString(), "UTF-8") + "&"
            var session = URLEncoder.encode("session", "UTF-8") + "=" + URLEncoder.encode(Data.responseBody, "UTF-8")
            AsyncRequest().execute("/addHash", reqParam, session)
            imageView_qrCode.setImageBitmap(qrImage)
            btn_save.visibility = View.VISIBLE
        }
    }

    private fun requestPermissionForExternalStorage() {
        if (ActivityCompat.shouldShowRequestPermissionRationale(this, Manifest.permission.WRITE_EXTERNAL_STORAGE)) {
            Toast.makeText(this, "External Storage permission needed. Please allow in App Settings for additional functionality.", Toast.LENGTH_LONG).show()
        } else {
            ActivityCompat.requestPermissions(this, arrayOf<String>(Manifest.permission.WRITE_EXTERNAL_STORAGE), EXTERNAL_STORAGE_PERMISSION_REQUEST_CODE)
        }
    }

    private fun checkPermissionForExternalStorage(): Boolean {

        val result = ContextCompat.checkSelfPermission(this, Manifest.permission.WRITE_EXTERNAL_STORAGE)
        return result == PackageManager.PERMISSION_GRANTED
    }
}

就行了错误：tools:context=".MainActivity 按照建议创建文件的时候，MainActivity.java被创建了，告诉我设置里面需要改什么

Red Cape

Asked: 2021-11-28 21:25:09 +0800 CST

安卓。Activity 看不到按钮 ID

-1

不要告诉我为什么我想设置按下时起作用的功能的按钮在我的活动中不可见。

Red Cape

Asked: 2021-11-15 01:13:57 +0800 CST

春天。如何发送401码等？

0

有RequestMapping：

@RequestMapping(
        value = "/login",
        method = RequestMethod.GET,
        produces = MediaType.APPLICATION_JSON_VALUE
)
public UUID restMethod(String hashCredentials) throws SQLException {
    System.out.println(hashCredentials + " | ");
    UUID id = UUID.randomUUID();
    //dbHandler.getAllUsers();
    return id;
}

它总是回复 200。问题是如何更改 responseCode 并将必要的信息作为 json 添加到正文中。

Red Cape

Asked: 2021-11-05 03:53:40 +0800 CST

如何在春季将正文处理为json？

0

我正在尝试在春季学习 api。GET 请求发送良好，但 POST 仍然很困难

@RequestMapping(
        value = "/pay",
        method = RequestMethod.POST,
        produces = MediaType.APPLICATION_JSON_VALUE
)
public @ResponseBody void pay(String key) {
    System.out.println();
}

我不知道 json 被发送到哪里，以及如何在 spring 中进一步使用它。提前感谢您的澄清。

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安卓。Activity 看不到按钮 ID

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如何在春季将正文处理为json？

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