【Android】19.2ShareActionProvider类—帮你把信息分享出去

xml version="1.0" encoding="utf-8" ?> 
<menu xmlns:android="http://schemas.android.com/apk/res/android">
  <item android:id="@+id/ch1902_overflowMenuItem"
      android:showAsAction="never"
      android:title="图片分享"
      android:actionProviderClass="android.widget.ShareActionProvider" />
menu>

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">
    <TextView
        android:text="提示：请单击右上角的【...】菜单。"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_gravity="center"
        android:gravity="center"
        android:layout_marginTop="30dp"
        android:id="@+id/ch1902_textView1" />
LinearLayout>

using System.IO;
using Android.App;
using Android.Content;
using Android.OS;
using Android.Views;
using Android.Widget;

namespace MyDemos.SrcDemos
{
    [IntentFilter( new[]{ Intent.ActionMain }, Categories = new[] { ch.MyDemosCategory })]
    [Activity(Label = "例19-2-分享基本用法")]
    public class ch1902MainActivity : Activity
    {
        private string fileName= "ch1902monkey.png";//分享的图片文件名

        protected override void OnCreate(Bundle savedInstanceState)
        {
            base.OnCreate(savedInstanceState);
            CopyToPublic(fileName);  //将Assets下的图像资源读取到共享存储区
            SetContentView(Resource.Layout.ch1902Main);
        }

        public override bool OnCreateOptionsMenu(IMenu menu)
        {
            //填充菜单
            MenuInflater.Inflate(Resource.Menu.ch1902ActionBarMenu, menu);

            var item = menu.FindItem(Resource.Id.ch1902_overflowMenuItem);
            var provider = (ShareActionProvider)item.ActionProvider;

            var pictureIntent = new Intent(Intent.ActionSend);
            pictureIntent.SetType("image/*");
            var uri = Android.Net.Uri.FromFile(GetFileStreamPath(fileName));
            pictureIntent.PutExtra(Intent.ExtraStream, uri);

            //设置分享出来的Intent
            provider.SetShareIntent(pictureIntent);
            return true;
        }

        private void CopyToPublic(string fileName)
        {
            using (Stream fromStream = Assets.Open(fileName))
            {
                string filePath = Path.Combine(new string[] { "data", "data", PackageName, "files", fileName });
                int size = 32 * 1024;
                using (FileStream toStream = new FileStream(filePath, FileMode.Create, FileAccess.ReadWrite))
                {
                    int n = -1;
                    byte[] buffer = new byte[size];
                    while ((n = fromStream.Read(buffer, 0, size)) > 0)
                    {
                        toStream.Write(buffer, 0, n);
                    }
                }
            }
        }
    }
}

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">
    <TextView
        android:text="下面的图来自图片分享"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_gravity="center"
        android:gravity="center"
        android:layout_marginTop="30dp"
        android:id="@+id/ch1902_textViewShow" />
    <ImageView
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:id="@+id/ch1902_imageViewShow"
        android:layout_marginTop="30dp" />
LinearLayout>

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

using Android.App;
using Android.Content;
using Android.OS;
using Android.Widget;

namespace MyDemos.SrcDemos
{
    [IntentFilter( new[]{ Intent.ActionSend },
        Categories = new[] { Intent.CategoryDefault },
        DataMimeType = "image/*" )]
    [Activity(Label = "图片分享查看器")]
    public class ch1902SharedShow : Activity
    {
        protected override void OnCreate(Bundle savedInstanceState)
        {
            base.OnCreate(savedInstanceState);
            SetContentView(Resource.Layout.ch1902SharedShow);
            var imageUri = (Android.Net.Uri)Intent.GetParcelableExtra(Intent.ExtraStream);
            if (imageUri != null)
            {
                var imageView1 = FindViewById(Resource.Id.ch1902_imageViewShow);
                imageView1.SetImageURI(imageUri);
            }
        }
    }
}