Android利用Intent实现读取图片操作

<?xml version="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>

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);      }    }  }}