加载活动WallPaper的URL图像

Question

嘿-我正试图通过URL在活壁纸中加载一张图片.有可能吗？如果是这样的话，你能告诉我为什么这段代码不能工作(日志-“无法从：”+url加载位图)吗？谢谢!

引擎- Runnable - run():

...
c = holder.lockCanvas();
if (c != null) {
  try {
    final Bitmap b = BitmapUtils.loadBitmap("http://mw2.google.com/mw-panoramio/photos/medium/17287086.jpg");
    c.drawBitmap(b, 0, 0, null);                                                               
  } catch (Exception e) {
    Log.e("Debug", e.toString());
  }
}
...

BitmapUtils

public static Bitmap loadBitmap(String url) {
        Bitmap bitmap = null;
        InputStream in = null;
        BufferedOutputStream out = null;

        try {
            in = new BufferedInputStream(new URL(url).openStream(), IO_BUFFER_SIZE);

            final ByteArrayOutputStream dataStream = new ByteArrayOutputStream();
            out = new BufferedOutputStream(dataStream, IO_BUFFER_SIZE);
            copy(in, out);
            out.flush();

            final byte[] data = dataStream.toByteArray();
            bitmap = BitmapFactory.decodeByteArray(data, 0, data.length);
        } catch (IOException e) {
            Log.e(TAG, "Could not load Bitmap from: " + url);
        } finally {
            closeStream(in);
            closeStream(out);
        }

        return bitmap;
    }

Answer 1

是的，这是可能的。我一直都这么做。:-)

可能你的“问题”是你忽略了

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

在你的AndroidManifest.xml里