Set Image to a ImageView from URL [duplicate]

问题

I have Imageview and a link to the picture on the Internet. I set this picture to the ImageView like this,

public ImageView iv;
iv = (ImageView) findViewById(R.id.imageView);
String img = "https://www.google.com/images/srpr/logo11w.png";
iv.setImageDrawable(Drawable.createFromPath(img));

What I want to do is download a picture from the internet to my android application and apply it to an ImageView. I want to make it as easy as possible.

helped me

String img_url= //url of the image
    URL url=new URL(img_url);
    Bitmap bmp; 
    bmp=BitmapFactory.decodeStream(url.openConnection().getInputStream());
    ImageView iv=(ImageView)findviewById(R.id.imageview);
    iv.setImageBitmap(bmp);

回答1:

There many libs to do this, my favourite is Picasso.

Here an example of usage:

Picasso.with(context).load("http://i.imgur.com/DvpvklR.png").into(imageView);

give it a try :)

回答2:

This method create a Drawable from file path name. Check this answer.

回答3:

There are many libraries available on doing this, I recommend using a library, because a they have many extra options availble.

Take Universal Image Loader

Features

Multithread image loading
Possibility of wide tuning ImageLoader's configuration (thread executors, downloader, decoder, memory and disc cache, display image options, and others)
Possibility of image caching in memory and/or on device's file system (or SD card)
Possibility to "listen" loading process
Possibility to customize every display image call with separated options Widget support
Possibility to show an custom Image on loading, error, etc.

You have to set the options one time using:

DisplayImageOptions defaultOptions = new DisplayImageOptions.Builder()
            .cacheInMemory(true)
            .cacheOnDisc(true)
            .build();
ImageLoaderConfiguration config = new ImageLoaderConfiguration.Builder(getApplicationContext())
            .defaultDisplayImageOptions(defaultOptions)
            .build();
ImageLoader.getInstance().init(config);

Then, lateron you can use this anywhere in your code:

ImageView iv = (ImageView) findViewById(R.id.imageView);
String str = "http://google.com/img.jpg";

ImageLoader.getInstance().displayImage(str, iv);

Ofcourse there are many other libraries you can use like picasso, Smart Image View, Url Image View and many others.

来源：https://stackoverflow.com/questions/22008754/set-image-to-a-imageview-from-url

标签

android

imageview