如何从android中的url获取位图？

Question

我有一个uri喜欢哪个有图像

file:///mnt/...............

如何使用这个uri来获取图像,但它返回null,请告诉我我错在哪里.

Bitmap bitmap = BitmapFactory.decodeFile(uri.getPath());
Bitmap bitmap = BitmapFactory.decodeFile(uri.toString());

Answer 1

这是一种简单的单行方式:

    try {
        URL url = new URL("http://....");
        Bitmap image = BitmapFactory.decodeStream(url.openConnection().getInputStream());
    } catch(IOException e) {
        System.out.println(e);
    }

Answer 2

这应该做的伎俩:

public static Bitmap getBitmapFromURL(String src) {
    try {
        URL url = new URL(src);
        HttpURLConnection connection = (HttpURLConnection) url.openConnection();
        connection.setDoInput(true);
        connection.connect();
        InputStream input = connection.getInputStream();
        Bitmap myBitmap = BitmapFactory.decodeStream(input);
        return myBitmap;
    } catch (IOException e) {
        e.printStackTrace();
        return null;
    }
} // Author: silentnuke

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