Xamarin.Form 弹出自定义对话框

来源：互联网发布：乐视2pro相机优化编辑：程序博客网时间：2024/05/18 00:43

第一步先在MainActivity.cs 文件把当前Activity 获取。注意：Xamarin.Form是可以直接调用安卓原生方法的，有些伙伴可能比较迷茫

public class MainActivity : global::Xamarin.Forms.Platform.Android.FormsAppCompatActivity{protected override void OnCreate(Bundle bundle){TabLayoutResource = Resource.Layout.Tabbar;ToolbarResource = Resource.Layout.Toolbar;base.OnCreate(bundle);global::Xamarin.Forms.Forms.Init(this, bundle);//获取当前的活动视图LoadApplication(new App());}}

然后创建Layout文件，

xml代码如下：

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:orientation="vertical"    android:minWidth="200dp"    android:padding="10dp"    android:paddingTop="30dp"    android:paddingBottom="30dp"    android:layout_width="match_parent"    android:layout_height="match_parent">    <EditText        android:layout_width="match_parent"        android:layout_height="wrap_content"        android:hint="小区名称"        android:minHeight="45dp" />    <ImageView        android:src="@android:color/holo_blue_light"        android:layout_width="match_parent"        android:layout_height="200dp" />    <Button        android:text="提交"        android:minHeight="45dp"        android:layout_width="match_parent"        android:layout_height="wrap_content" /></LinearLayout>

然后再创建对应的cs文件；

using Android.App;using Android.Content;using Lierda.HandApp.Droid;public class CreateAreaInformation : Dialog{public Context context { get; private set; }public CreateAreaInformation(Context context) : base(context){this.context = context;}protected override void OnCreate(Android.OS.Bundle savedInstanceState){this.SetContentView(Resource.Layout.CreateAreaInformationDialog);var dialogWindow = this.Window;var act = context as Activity;var manager = act.WindowManager;var display = manager.DefaultDisplay;var attr = dialogWindow.Attributes;#pragma warning disable CS0618 // Type or member is obsoleteattr.Width = (int)(display.Width * 0.8);#pragma warning restore CS0618 // Type or member is obsoletedialogWindow.Attributes = attr;base.OnCreate(savedInstanceState);}}

这里需要继承Dialog 类，注意命名空间，别弄错了。

最后便是调用了。

        /// <summary>        /// 单击新增小区        /// </summary>        /// <param name="sender"></param>        /// <param name="e"></param>        void Handle_Clicked(object sender, System.EventArgs e)        {

  //注意，Xamarin.Forms.Forms.Context便是当前活动。          CreateAreaInformation createAreaInformation = new CreateAreaInformation(Xamarin.Forms.Forms.Context);createAreaInformation.Show();        }

效果如下：

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