首页 \ 问答 \ Xamarin没有看到我的自定义视图(Xamarin not seeing my custom view)

Xamarin没有看到我的自定义视图(Xamarin not seeing my custom view)

我有一个名为SquareImageView的自定义视图,我想在我的xml文件中使用它。 但我的xml似乎无法解决它。 为什么? 我试过给它一个小写的完全限定的命名空间

XML:

<?xml version="1.0" encoding="utf-8"?>

<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
              android:layout_width="match_parent"
    android:layout_height="match_parent">
  <pokemonmobileclient.SquareImageView
      android:id="@+id/picture"
      android:layout_width="match_parent"
      android:layout_height="match_parent"
      android:scaleType="centerCrop" />
  <TextView
      android:id="@+id/text"
      android:layout_width="match_parent"
      android:layout_height="wrap_content"
      android:paddingLeft="10dp"
      android:paddingRight="10dp"
      android:paddingTop="15dp"
      android:paddingBottom="15dp"
      android:layout_gravity="bottom"
      android:textColor="@android:color/white"
      android:background="#55000000"
        />
</FrameLayout>

类:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

using Android.App;
using Android.Content;
using Android.OS;
using Android.Runtime;
using Android.Text.Style;
using Android.Util;
using Android.Views;
using Android.Widget;

namespace PokemonMobileClient
{

    public class SquareImageView : ImageView
    {
        public SquareImageView(IntPtr javaReference, JniHandleOwnership transfer) : base(javaReference, transfer)
        {
        }

        public SquareImageView(Context context) : base(context)
        {

        }

        public SquareImageView(Context context, IAttributeSet attrs) : base(context, attrs)
        {
        }

        public SquareImageView(Context context, IAttributeSet attrs, int defStyleAttr) : base(context, attrs, defStyleAttr)
        {
        }

        public SquareImageView(Context context, IAttributeSet attrs, int defStyleAttr, int defStyleRes) : base(context, attrs, defStyleAttr, defStyleRes)
        {

        }

        protected override void OnMeasure(int widthMeasureSpec, int heightMeasureSpec)
        {
            base.OnMeasure(widthMeasureSpec, heightMeasureSpec);
            SetMeasuredDimension(this.MeasuredWidth, this.MeasuredHeight);
        }
    }
}

<pokemonmobileclient.SquareImageView有一个下划线表示invalid child element pokemonmobileclient.SquareImageView

为什么我不能参考呢?

谢谢


I have a custom view called SquareImageView which I want to use in my xml file. But my xml can't seem to resolve it. Why? I've tried giving it the fully qualified namespace in lowercase

xml:

<?xml version="1.0" encoding="utf-8"?>

<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
              android:layout_width="match_parent"
    android:layout_height="match_parent">
  <pokemonmobileclient.SquareImageView
      android:id="@+id/picture"
      android:layout_width="match_parent"
      android:layout_height="match_parent"
      android:scaleType="centerCrop" />
  <TextView
      android:id="@+id/text"
      android:layout_width="match_parent"
      android:layout_height="wrap_content"
      android:paddingLeft="10dp"
      android:paddingRight="10dp"
      android:paddingTop="15dp"
      android:paddingBottom="15dp"
      android:layout_gravity="bottom"
      android:textColor="@android:color/white"
      android:background="#55000000"
        />
</FrameLayout>

Class:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

using Android.App;
using Android.Content;
using Android.OS;
using Android.Runtime;
using Android.Text.Style;
using Android.Util;
using Android.Views;
using Android.Widget;

namespace PokemonMobileClient
{

    public class SquareImageView : ImageView
    {
        public SquareImageView(IntPtr javaReference, JniHandleOwnership transfer) : base(javaReference, transfer)
        {
        }

        public SquareImageView(Context context) : base(context)
        {

        }

        public SquareImageView(Context context, IAttributeSet attrs) : base(context, attrs)
        {
        }

        public SquareImageView(Context context, IAttributeSet attrs, int defStyleAttr) : base(context, attrs, defStyleAttr)
        {
        }

        public SquareImageView(Context context, IAttributeSet attrs, int defStyleAttr, int defStyleRes) : base(context, attrs, defStyleAttr, defStyleRes)
        {

        }

        protected override void OnMeasure(int widthMeasureSpec, int heightMeasureSpec)
        {
            base.OnMeasure(widthMeasureSpec, heightMeasureSpec);
            SetMeasuredDimension(this.MeasuredWidth, this.MeasuredHeight);
        }
    }
}

<pokemonmobileclient.SquareImageView has an underline saying invalid child element pokemonmobileclient.SquareImageView

Why can't I reference it?

Thanks


原文:https://stackoverflow.com/questions/38908036
更新时间:2023-07-22 07:07

最满意答案

持久Realm对象只能在读取它们的同一个线程上读取或写入。 假设[self downloadMedia:success:failure:]的成功块是在与读取的messages不同的线程上调用的,这意味着您无法在块中使用message 。 为当前线程创建新的RLMRealm实例对捕获的变量没有任何影响。


Persisted Realm objects can only be read from or written to on the same thread as they were fetched on. Assuming that the success block for [self downloadMedia:success:failure:] is being called on a different thread than messages was read on, this means that you can't use message within the block. Creating a new RLMRealm instance for the current thread does not have any effect on the captured variables.

相关问答

更多

相关文章

更多

最新问答

更多
  • 您如何使用git diff文件,并将其应用于同一存储库的副本的本地分支?(How do you take a git diff file, and apply it to a local branch that is a copy of the same repository?)
  • 将长浮点值剪切为2个小数点并复制到字符数组(Cut Long Float Value to 2 decimal points and copy to Character Array)
  • OctoberCMS侧边栏不呈现(OctoberCMS Sidebar not rendering)
  • 页面加载后对象是否有资格进行垃圾回收?(Are objects eligible for garbage collection after the page loads?)
  • codeigniter中的语言不能按预期工作(language in codeigniter doesn' t work as expected)
  • 在计算机拍照在哪里进入
  • 使用cin.get()从c ++中的输入流中丢弃不需要的字符(Using cin.get() to discard unwanted characters from the input stream in c++)
  • No for循环将在for循环中运行。(No for loop will run inside for loop. Testing for primes)
  • 单页应用程序:页面重新加载(Single Page Application: page reload)
  • 在循环中选择具有相似模式的列名称(Selecting Column Name With Similar Pattern in a Loop)
  • System.StackOverflow错误(System.StackOverflow error)
  • KnockoutJS未在嵌套模板上应用beforeRemove和afterAdd(KnockoutJS not applying beforeRemove and afterAdd on nested templates)
  • 散列包括方法和/或嵌套属性(Hash include methods and/or nested attributes)
  • android - 如何避免使用Samsung RFS文件系统延迟/冻结?(android - how to avoid lag/freezes with Samsung RFS filesystem?)
  • TensorFlow:基于索引列表创建新张量(TensorFlow: Create a new tensor based on list of indices)
  • 企业安全培训的各项内容
  • 错误:RPC失败;(error: RPC failed; curl transfer closed with outstanding read data remaining)
  • C#类名中允许哪些字符?(What characters are allowed in C# class name?)
  • NumPy:将int64值存储在np.array中并使用dtype float64并将其转换回整数是否安全?(NumPy: Is it safe to store an int64 value in an np.array with dtype float64 and later convert it back to integer?)
  • 注销后如何隐藏导航portlet?(How to hide navigation portlet after logout?)
  • 将多个行和可变行移动到列(moving multiple and variable rows to columns)
  • 提交表单时忽略基础href,而不使用Javascript(ignore base href when submitting form, without using Javascript)
  • 对setOnInfoWindowClickListener的意图(Intent on setOnInfoWindowClickListener)
  • Angular $资源不会改变方法(Angular $resource doesn't change method)
  • 在Angular 5中不是一个函数(is not a function in Angular 5)
  • 如何配置Composite C1以将.m和桌面作为同一站点提供服务(How to configure Composite C1 to serve .m and desktop as the same site)
  • 不适用:悬停在悬停时:在元素之前[复制](Don't apply :hover when hovering on :before element [duplicate])
  • 常见的python rpc和cli接口(Common python rpc and cli interface)
  • Mysql DB单个字段匹配多个其他字段(Mysql DB single field matching to multiple other fields)
  • 产品页面上的Magento Up出售对齐问题(Magento Up sell alignment issue on the products page)