Android Intent Share使用外部图片网址 [英] Android Intent Share using external image url

问题描述

我不禁注意到，所有与Intent共享图像的示例都使用本地存储的文件. 每当我尝试使用外部URL，facebook，twitter等时，我都会举杯敬酒，说不能添加一个或多个媒体项目".

I couldn't help noticing that all examples of sharing images with Intent use locally stored files. Whenever I try to use a external url, facebook, twitter etc. gives me a toast saying "One or more media items could be not be added".

我是否必须在本地存储图像的副本?如果是，我该怎么做?

Do i have to store a copy of the image locally?If yes, how do i do that?

推荐答案

感谢@ user2245247

Thank you @user2245247 for the link
It contains the correct answer to share image from remote url.
Use external library

// Get access to ImageView 
ImageView ivImage = (ImageView) findViewById(R.id.ivResult);
// Fire async request to load image
Picasso.with(context).load(imageUrl).into(ivImage);

将图像成功加载到图像视图后，触发共享意图的方法.

After the image loaded successfully to the image view, trigger the method for sharing intent.

// Can be triggered by a view event such as a button press
public void onShareItem(View v) {
    // Get access to bitmap image from view
    ImageView ivImage = (ImageView) findViewById(R.id.ivResult);
    // Get access to the URI for the bitmap
    Uri bmpUri = getLocalBitmapUri(ivImage);
    if (bmpUri != null) {
        // Construct a ShareIntent with link to image
        Intent shareIntent = new Intent();
        shareIntent.setAction(Intent.ACTION_SEND);
        shareIntent.putExtra(Intent.EXTRA_STREAM, bmpUri);
        shareIntent.setType("image/*");
        // Launch sharing dialog for image
        startActivity(Intent.createChooser(shareIntent, "Share Image"));    
    } else {
        // ...sharing failed, handle error
    }
}

// Returns the URI path to the Bitmap displayed in specified ImageView
public Uri getLocalBitmapUri(ImageView imageView) {
    // Extract Bitmap from ImageView drawable
    Drawable drawable = imageView.getDrawable();
    Bitmap bmp = null;
    if (drawable instanceof BitmapDrawable){
       bmp = ((BitmapDrawable) imageView.getDrawable()).getBitmap();
    } else {
       return null;
    }
    // Store image to default external storage directory
    Uri bmpUri = null;
    try {
        File file =  new File(Environment.getExternalStoragePublicDirectory(  
            Environment.DIRECTORY_DOWNLOADS), "share_image_" + System.currentTimeMillis() + ".png");
        file.getParentFile().mkdirs();
        FileOutputStream out = new FileOutputStream(file);
        bmp.compress(Bitmap.CompressFormat.PNG, 90, out);
        out.close();
        bmpUri = Uri.fromFile(file);
    } catch (IOException e) {
        e.printStackTrace();
    }
    return bmpUri;
}

确保您具有以下权限.

<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />

这篇关于Android Intent Share使用外部图片网址的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！