分享意图需要很长时间才能出现

Question

I'm trying to include image sharing in my application and everything is working but the share chooser takes long time to appear on devices

here is what i'm doing:

I have ImageView "items_details_image" and I want to share its image to be able to send it through whatsapp and other apps

void ShareImg() {
    try {
        Uri bmpUri = getLocalBitmapUri(items_details_image);
        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
        }
    } catch (Exception e) {

    }
}

here is how I get bitmap from Image URL

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;
}

I don't know why it is taking longer than usual comparing it with other apps on the same device such as gallery or whatever

Answer 1

You are doing disk I/O on the main application thread, in getLocalBitmapUri() . This will freeze your UI as long as it takes to write your bitmap to disk.