本文实例演示如何从图库(Gallery)中读取图像并用ImageView将它显示出来,供大家参考,具体内容如下
运行本示例前,需要先利用相机模拟拍摄一些图片到图库中。
1、运行截图
2、主要设计步骤
(1)添加ch1203_ReadGallery.axml
<"1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:orientation="vertical" android:layout_width="fill_parent" android:layout_height="fill_parent"> <Button android:id="@+id/btn1" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_margin="30dp" android:layout_gravity="center" android:text="从图库中挑选一幅图片" /> <TextView android:text="你挑选的图片为:" android:layout_width="wrap_content" android:layout_height="wrap_content" android:id="@+id/textView1" android:layout_gravity="center" android:layout_margin="30dp" /> <ImageView android:id="@+id/myImageView" android:layout_gravity="center" android:layout_width="wrap_content" android:layout_height="wrap_content" /> </LinearLayout>
(2)添加ch1203ReadGallery.cs
using Android.App; using Android.Content; using Android.OS; using Android.Runtime; using Android.Widget; namespace MyDemos.SrcDemos { [Activity(Label = "【例12-3】读取图库图片")] public class ch1203ReadGallery : Activity { protected override void OnCreate(Bundle savedInstanceState) { base.OnCreate(savedInstanceState); SetContentView(Resource.Layout.ch1203_ReadGallery); var btn1 = FindViewById<Button>(Resource.Id.btn1); btn1.Click += delegate { var imageIntent = new Intent(); imageIntent.SetType("image/*"); imageIntent.SetAction(Intent.ActionGetContent); StartActivityForResult( Intent.CreateChooser(imageIntent, "选择的图片:"), 0); }; } protected override void OnActivityResult(int requestCode, [GeneratedEnum] Result resultCode, Intent data) { base.OnActivityResult(requestCode, resultCode, data); if (resultCode == Result.Ok) { var imageView = FindViewById<ImageView>(Resource.Id.myImageView); imageView.SetImageURI(data.Data); } } } }
以上就是本文的全部内容,希望对大家的学习有所帮助,也希望大家多多支持查字典教程网。