Android 从 URL 加载到位图 [英] Android load from URL to Bitmap

问题描述

我有一个关于从网站加载图片的问题.我使用的代码是:

I have a question about loading an image from a website. The code I use is:

Display display = getWindowManager().getDefaultDisplay(); 
int width = display.getWidth();
int height = display.getHeight();
Bitmap bit=null;
try {
    bit = BitmapFactory.decodeStream((InputStream)new URL("http://www.mac-wallpapers.com/bulkupload/wallpapers/Apple%20Wallpapers/apple-black-logo-wallpaper.jpg").getContent());
} catch (Exception e) {}
Bitmap sc = Bitmap.createScaledBitmap(bit,width,height,true);
canvas.drawBitmap(sc,0,0,null);

但是总是返回空指针异常导致程序崩溃.该 URL 是有效的，并且似乎对其他人都有效.我使用的是 2.3.1.

But it always returns a null pointer exception and the program crashes out. The URL is valid, and it seems to work for everyone else. I'm using 2.3.1.

推荐答案

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) {
        // Log exception
        return null;
    }
}

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