Question

我已经搜索了ImageView解决方案，但我无法执行一些代码，因为它可能是通过Visual Studio在Android Studio中完成的。

我想在Main.axml中显示存储在位置（Android资源/文件系统）的图像，以下是Main的XML： -

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:id="@+id/RelativeLay"
    tools:context=".MainActivity">
    <VideoView
        android:id="@+id/zoneVid"
        android:visibility="visible"
        android:layout_width="match_parent"
        android:layout_height="match_parent" />
    <ImageView
        android:src="@android:drawable/ic_menu_gallery"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:id="@+id/zoneImg" />
</RelativeLayout>

图像当前存在于“drawable”文件夹中，序列命名为“view01” - “view06”。 OnCreate方法，我将嵌入文件读入动态对象并拆分成数组，因为每一行都包含每个图像名称，宽度，高度，顶部和左边距。

以下是MainActivity.cs文件的完整代码： -

public class MainActivity : Activity//, MediaPlayer.IOnPreparedListener, ISurfaceHolderCallback
{
    public static string PACKAGENAME;
    ImageView zoneImg;
    MediaPlayer zonePlayer;
    VideoView zoneVid;
    RelativeLayout rl;
    protected override void OnCreate(Bundle bundle)
    {
        base.OnCreate(bundle);
        SetContentView(Resource.Layout.Main);
        // GET PACKAGE NAME FROM APPLICATION
        MainActivity.PACKAGENAME = ApplicationInfo.PackageName;

        DisplayMetrics displayMetrics = new DisplayMetrics();
        WindowManager.DefaultDisplay.GetRealMetrics(displayMetrics);

        int height = displayMetrics.HeightPixels;
        int width = displayMetrics.WidthPixels;


        Assembly assem = this.GetType().Assembly;
        var content = (dynamic)null;
        using (System.IO.Stream stream = assem.GetManifestResourceStream(assem.GetName().Name + '.' + "SampleZone.txt"))
        {
            if (stream != null)
            {
                using (var reader = new StreamReader(stream))
                {
                    content = reader.ReadToEnd();
                }
            }
        }
        if (content != null)
        {
            rl = FindViewById<RelativeLayout>(Resource.Id.RelativeLay);
            RelativeLayout.LayoutParams param;
            int resourceId;

            string[] zone_element = content.Split(new[] { "\r\n", "\r", "\n" }, System.StringSplitOptions.None);
            var gridView = new GridLayout(this);

            foreach (var zone_line in zone_element)
            {
                string[] zone_details = zone_line.Split('|');
                double widthpercent = Convert.ToDouble(zone_details[1]), heightpercent = Convert.ToDouble(zone_details[2]);
                String FileName = zone_details[5].ToString();
                String FileExtension = FileName.Substring(FileName.LastIndexOf("."));
                switch (FileExtension)
                {
                    case ".png":
                    case ".bmp":
                    case ".gif":
                    case ".webp":
                    case ".jpeg":
                    case ".jpg":
                        {
                            zoneImg = new ImageView(this);
                            int virt_width = (int)Math.Round(width * (widthpercent / 100));
                            int virt_height = (int)Math.Round(height * (heightpercent / 100));
                            RelativeLayout.LayoutParams layout = new RelativeLayout.LayoutParams(virt_width, virt_height);

                            layout.SetMargins(Convert.ToInt32(zone_line[3]), Convert.ToInt32(zone_line[4]), 0, 0);

                            resourceId = (int)typeof(Resource.Drawable).GetField(System.IO.Path.GetFileNameWithoutExtension(FileName)).GetValue(null);
                            zoneImg.SetImageResource(resourceId);
                            zoneImg.RequestLayout();
                            //param = new RelativeLayout.LayoutParams(virt_width, virt_height)
                            //{

                            //    LeftMargin = Convert.ToInt32(zone_line[3]),
                            //    TopMargin = Convert.ToInt32(zone_line[4])
                            //};
                            //zoneImg.LayoutParameters= new LayoutParams(param);
                            //rl.AddView(zoneImg);
                            break;
                        }
                    case ".avi":
                    case ".3gp":
                    case ".webm":
                    case ".mkv":
                    case ".mp4":
                        {
                            //zoneVid = FindViewById<VideoView>(Resource.Id.zoneVid);
                            //resourceId = (int)typeof(Resource.Drawable).GetField(System.IO.Path.GetFileNameWithoutExtension(FileName)).GetValue(null);
                            //var uri = Android.Net.Uri.Parse("android.resource://" + MainActivity.PACKAGENAME + '/' + resourceId);
                            //zoneVid.SetVideoURI(uri);
                            //zoneVid.SetMediaController(null);
                            //int virt_width = (int)Math.Round(width * (widthpercent / 100));
                            //int virt_height = (int)Math.Round(height * (heightpercent / 100));
                            //RelativeLayout.LayoutParams rltvparams = new RelativeLayout.LayoutParams(virt_width, virt_height)
                            //{
                            //    LeftMargin = Convert.ToInt32(zone_line[3]),
                            //    TopMargin = Convert.ToInt32(zone_line[4])
                            //};
                            //zoneVid.LayoutParameters = new LayoutParams(rltvparams);
                            ////rl.AddView(zoneVid);
                            //zoneVid.RequestFocus();
                            //zoneVid.Visibility = ViewStates.Visible;
                            //zoneVid.Start();
                            break;
                        }
                }
            }
        }
    }
}

我已经对我的代码发表了评论，因为我尝试了几件事，因为图像在边距和尺寸上没有正确。我看不到Visual Studio Intellisense功能出现在

上

image.getLayoutParams（）。height = 100;

imageView.setLayoutParams（PARAMS）;

我从一些解决方案/讨论/教程中发现但无法弄清楚： -

Set ImageView width and height programmatically?

Setting margins for an imageview dynamically

Answer 1

你可以这样使用。

    var param = (RelativeLayout.LayoutParams)zoneImg.LayoutParameters;
    params.SetMargins (0,0,0,10);
    //Or
    params.BottomMargin = 10;
    myView.LayoutParameters = params;

如何设置VideoView＆amp; ImageView边距，宽度和高度动态？

1 个答案: