Question

之前我正在获得这样的Facebook用户个人资料图片，直到最近一切正常。

但现在每次都返回null。

这是网址：

"http://graph.facebook.com/"+userID+"/picture?height=100&type=normal&width=100"

这可能是因为Facebook的重定向而发生的吗？因为如果您在浏览器中打开此URL，则会重定向到以下内容：https://fbcdn-profile-a.akamaihd.net/......。有办法解决这个问题吗？

这是我的Asynctask：

public class GetUserPicture extends AsyncTask<String, Void, Bitmap> {
  ImageView profileImage;

  public GetUserPicture(ImageView profileImage) {
    this.profileImage = profileImage;
  }

  @Override
  protected Bitmap doInBackground(String... urls) {
    String urldisplay = urls[0];
    Log.d("SHOW CORRECT URL", urldisplay);
        Bitmap bitmap = null;
    try {
      URL url = new URL(urldisplay);
      bitmap = BitmapFactory.decodeStream(url.openConnection().getInputStream());
      HttpURLConnection.setFollowRedirects(true);
    } catch (Exception e) {
        e.printStackTrace();
    }
    return bitmap;
  }

  @Override
  protected void onPostExecute(Bitmap result) {
    if (result != null) {
      Log.d("Not null", "NOT NULLL");
    }
    profileImage.setImageBitmap(getRoundedCornerBitmap(result, 70));
  }

  protected static Bitmap getRoundedCornerBitmap(Bitmap bitmap, int pixels) {
        Bitmap output = Bitmap.createBitmap(bitmap.getWidth(), bitmap
            .getHeight(), Config.ARGB_8888);

        BitmapShader bitmapShader = new BitmapShader(bitmap, Shader.TileMode.CLAMP, Shader.TileMode.CLAMP);
    Paint pnt = new Paint();
    pnt.setAntiAlias(true);
    pnt.setShader(bitmapShader);

    Canvas canvas = new Canvas(output);

    final int color = 0xff424242;
    final Paint paint = new Paint();
    final Rect rect = new Rect(0, 0, bitmap.getWidth(), bitmap.getHeight());
    final RectF rectF = new RectF(rect);
    final float roundPx = pixels;

    paint.setAntiAlias(true);
    canvas.drawARGB(0, 0, 0, 0);
    paint.setColor(color);
    canvas.drawRoundRect(rectF, roundPx, roundPx, paint);

    paint.setXfermode(new PorterDuffXfermode(Mode.SRC_IN));
    canvas.drawBitmap(bitmap, rect, rect, paint);


    return output;
}

}

我从facebook上获取这张照片，将其四舍五入然后显示出来。但它曾经在两周前工作正常！如果我传递的重定向网址如下所示：https://fbcdn-profile-a.akamaihd.net/hprofile-ak-prn1/t1.0-1/c12.12.155.155/s100x100/....jpg然后它会显示图像！

这是错误：

03-31 12:05:08.482: D/skia(14479): --- SkImageDecoder::Factory returned null
03-31 12:05:08.482: D/AndroidRuntime(14479): Shutting down VM
03-31 12:05:08.482: W/dalvikvm(14479): threadid=1: thread exiting with uncaught exception (group=0x41675d40)
03-31 12:05:08.484: E/AndroidRuntime(14479): FATAL EXCEPTION: main
03-31 12:05:08.484: E/AndroidRuntime(14479): Process: com.hitchhiker.mobile, PID: 14479
03-31 12:05:08.484: E/AndroidRuntime(14479): java.lang.NullPointerException
03-31 12:05:08.484: E/AndroidRuntime(14479):  at com.hitchhiker.mobile.asynctasks.GetUserPicture.getRoundedCornerBitmap(GetUserPicture.java:54)
03-31 12:05:08.484: E/AndroidRuntime(14479):  at com.hitchhiker.mobile.asynctasks.GetUserPicture.onPostExecute(GetUserPicture.java:50)
03-31 12:05:08.484: E/AndroidRuntime(14479):  at com.hitchhiker.mobile.asynctasks.GetUserPicture.onPostExecute(GetUserPicture.java:1)
03-31 12:05:08.484: E/AndroidRuntime(14479):  at android.os.AsyncTask.finish(AsyncTask.java:632)
03-31 12:05:08.484: E/AndroidRuntime(14479):  at android.os.AsyncTask.access$600(AsyncTask.java:177)
03-31 12:05:08.484: E/AndroidRuntime(14479):  at android.os.AsyncTask$InternalHandler.handleMessage(AsyncTask.java:645)
03-31 12:05:08.484: E/AndroidRuntime(14479):  at android.os.Handler.dispatchMessage(Handler.java:102)
03-31 12:05:08.484: E/AndroidRuntime(14479):  at android.os.Looper.loop(Looper.java:136)
03-31 12:05:08.484: E/AndroidRuntime(14479):  at android.app.ActivityThread.main(ActivityThread.java:5102)
03-31 12:05:08.484: E/AndroidRuntime(14479):  at java.lang.reflect.Method.invokeNative(Native Method)
03-31 12:05:08.484: E/AndroidRuntime(14479):  at java.lang.reflect.Method.invoke(Method.java:515)
03-31 12:05:08.484: E/AndroidRuntime(14479):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:785)
03-31 12:05:08.484: E/AndroidRuntime(14479):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:601)
03-31 12:05:08.484: E/AndroidRuntime(14479):  at dalvik.system.NativeStart.main(Native Method)
03-31 12:05:08.743: D/skia(14479): --- SkImageDecoder::Factory returned null
03-31 12:05:09.023: D/skia(14479): --- SkImageDecoder::Factory returned null
03-31 12:05:09.286: D/skia(14479): --- SkImageDecoder::Factory returned null
03-31 12:05:09.526: D/skia(14479): --- SkImageDecoder::Factory returned null
03-31 12:05:09.813: D/skia(14479): --- SkImageDecoder::Factory returned null

Answer 1

我不确定，但您可以尝试使用实际网址（fb重定向的网址）。

要获取此网址，请使用redirect=0，如下所示 -

"http://graph.facebook.com/"+userID+"/picture?height=100&type=normal&width=100&redirect=0"

然后你会得到回复 -

{
   data: {
      url: "https://fbcdn-profile-a.akamaihd.net/hprofile-ak-prn1/t5.0-1/23122_595273610_9552621_q.jpg",
      is_silhouette: false
   }
}

从字典中获取此网址然后尝试。我不确定，但有帮助。

但如果它不起作用，那么它与您的代码有关，我建议您打印确切的错误/异常。

修改

我发现：

当原始协议和重定向协议相同时，自动重定向会自动生效。

因此，请尝试从 https 而非 http 加载图片：＆＃34; https://graph.facebook.com/USER_ID/picture＆＃34 ;;因为图片的网址是＆＃34; https://fbcdn-profile-a.akamaihd.net/ ....＆＃34;

然后BitmapFactory.decodeStream将再次运作。

Answer 2

原始网址的协议是HTTP，其中重定向的网址协议是HTTPS。

仅当原始和重定向的URL遵循相同的协议时才会发生自动重定向。

因此请更改您的图片网址从＆＃34; http://graph.facebook.com/＆＃34; + userID + .. 至＆＃34; https://graph.facebook.com/＆＃34; + userID + ..

Facebook个人资料图片Android返回null

2 个答案: