Android 将图像上载到facebook问题

我正在尝试将图片上传到facebook。我现在的代码正在运行。我正在使用图像路径从数据库上载图像

    public void postImage() {

    facebook.authorize(this, new DialogListener() {
        public void onComplete(Bundle values) {
             byte[] data = null;
             String upploadpath = ((MyVariables) getApplication()) .getUpploadPath();

             Bitmap bi = BitmapFactory.decodeFile(upploadpath);
             Bitmap scaledimage = Bitmap.createScaledBitmap(bi, 720, 520, false);

             ByteArrayOutputStream baos = new ByteArrayOutputStream();
             scaledimage.compress(Bitmap.CompressFormat.JPEG, 100, baos);
             data = baos.toByteArray();

             Bundle params = new Bundle();
             params.putString(Facebook.TOKEN, facebook.getAccessToken());
             params.putString("method", "photos.upload");
             params.putByteArray("picture", data);
             params.putString("caption", "Caption text");



             AsyncFacebookRunner mAsyncRunner = new AsyncFacebookRunner(facebook);
             mAsyncRunner.request(null, params, "POST", new PhotoUploadListener(), null);
        }

        public void onFacebookError(FacebookError error) {}

        public void onError(DialogError e) {}

        public void onCancel() {}         
    });
}

@Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
    super.onActivityResult(requestCode, resultCode, data);

    facebook.authorizeCallback(requestCode, resultCode, data);
}

/*
 * callback for the photo upload
 */
public class PhotoUploadListener extends BaseRequestListener {

    @Override
    public void onComplete(final String response, final Object state) {
        Log.e("Facebook", "onComplete");

    }

    public void onFacebookError(FacebookError error) {

    }
}

这里的问题是我硬编码了图像的大小。而且方向不起作用，所以即使照片是在纵向模式下拍摄的，也会从侧面上传照片

使用facebooks hackbook，图像可以重新缩放并获得正确的方向。我尝试使用以下代码：

 public void postImage() {

    facebook.authorize(this, new DialogListener() {
        public void onComplete(Bundle values) {

             String upploadpath = ((MyVariables) getApplication()) .getUpploadPath();
             Uri photoUri = Uri.parse(upploadpath);

             if (photoUri != null) {
                 Bundle params = new Bundle();
                 try {
                     params.putByteArray("photo",
                             Utility.scaleImage(getApplicationContext(), photoUri));
                 } catch (IOException e) {
                     e.printStackTrace();
                 }
                 params.putString("caption", "FbAPIs Sample App photo upload");

 Utility.mAsyncRunner.request("me/photos", params, "POST",
                         new PhotoUploadListener(), null);
             } else {
                 Toast.makeText(getApplicationContext(),
                         "Error selecting image from the gallery.", Toast.LENGTH_SHORT)
                         .show();
             }
        }

        public void onFacebookError(FacebookError error) {}

        public void onError(DialogError e) {}

        public void onCancel() {}         
    });
}

@Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
    super.onActivityResult(requestCode, resultCode, data);

    facebook.authorizeCallback(requestCode, resultCode, data);
}

/*
 * callback for the photo upload
 */
public class PhotoUploadListener extends BaseRequestListener {

    @Override
    public void onComplete(final String response, final Object state) {
        Log.e("Facebook", "onComplete");

    }

    public void onFacebookError(FacebookError error) {

    }
}

但这给了我一个错误：

 07-23 18:47:22.290: E/LOG_TAG(9293): Setting filepath: /mnt/sdcard/Pictures/MyApp/IMG_20120721_192609.jpg
 07-23 18:47:27.340: E/AndroidRuntime(9293): FATAL EXCEPTION: main
 07-23 18:47:27.340: E/AndroidRuntime(9293): java.lang.RuntimeException: Failure delivering result ResultInfo{who=null, request=32665, result=-1, data=Intent { (has extras) }} to activity {com.ubbep.myapp/com.ubbep.myapp.ViewContact}: java.lang.NullPointerException
 07-23 18:47:27.340: E/AndroidRuntime(9293):    at android.app.ActivityThread.deliverResults(ActivityThread.java:2992)
 07-23 18:47:27.340: E/AndroidRuntime(9293):    at android.app.ActivityThread.handleSendResult(ActivityThread.java:3035)
 07-23 18:47:27.340: E/AndroidRuntime(9293):    at android.app.ActivityThread.access$1100(ActivityThread.java:127)
 07-23 18:47:27.340: E/AndroidRuntime(9293):    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1189)
 07-23 18:47:27.340: E/AndroidRuntime(9293):    at android.os.Handler.dispatchMessage(Handler.java:99)
 07-23 18:47:27.340: E/AndroidRuntime(9293):    at android.os.Looper.loop(Looper.java:137)
 07-23 18:47:27.340: E/AndroidRuntime(9293):    at android.app.ActivityThread.main(ActivityThread.java:4507)
 07-23 18:47:27.340: E/AndroidRuntime(9293):    at java.lang.reflect.Method.invokeNative(Native Method)
 07-23 18:47:27.340: E/AndroidRuntime(9293):    at java.lang.reflect.Method.invoke(Method.java:511)
 07-23 18:47:27.340: E/AndroidRuntime(9293):    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:790)
 07-23 18:47:27.340: E/AndroidRuntime(9293):    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:557)
 07-23 18:47:27.340: E/AndroidRuntime(9293):    at dalvik.system.NativeStart.main(Native Method)
 07-23 18:47:27.340: E/AndroidRuntime(9293): Caused by: java.lang.NullPointerException
 07-23 18:47:27.340: E/AndroidRuntime(9293):    at com.ubbep.myapp.ViewContact$3.onComplete(ViewContact.java:360)
 07-23 18:47:27.340: E/AndroidRuntime(9293):    at com.facebook.android.Facebook.authorizeCallback(Facebook.java:433)
 07-23 18:47:27.340: E/AndroidRuntime(9293):    at com.ubbep.myapp.ViewContact.onActivityResult(ViewContact.java:381)
 07-23 18:47:27.340: E/AndroidRuntime(9293):    at android.app.Activity.dispatchActivityResult(Activity.java:4649)
 07-23 18:47:27.340: E/AndroidRuntime(9293):    at android.app.ActivityThread.deliverResults(ActivityThread.java:2988)

因此，删除：

  facebook.authorizeCallback(requestCode, resultCode, data);

发件人：

@Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
    super.onActivityResult(requestCode, resultCode, data);

    facebook.authorizeCallback(requestCode, resultCode, data);
}

我没有收到任何错误，但是图片没有上传

facebook hackbook Utility.java中包含以下代码：

   public static byte[] scaleImage(Context context, Uri photoUri) throws IOException {
    InputStream is = context.getContentResolver().openInputStream(photoUri);
    BitmapFactory.Options dbo = new BitmapFactory.Options();
    dbo.inJustDecodeBounds = true;
    BitmapFactory.decodeStream(is, null, dbo);
    Log.e("scaleImage", "scaling image" + photoUri);
    is.close();

    int rotatedWidth, rotatedHeight;
    int orientation = getOrientation(context, photoUri);

    if (orientation == 90 || orientation == 270) {
        rotatedWidth = dbo.outHeight;
        rotatedHeight = dbo.outWidth;
    } else {
        rotatedWidth = dbo.outWidth;
        rotatedHeight = dbo.outHeight;
    }

    Bitmap srcBitmap;
    is = context.getContentResolver().openInputStream(photoUri);
    if (rotatedWidth > MAX_IMAGE_DIMENSION || rotatedHeight > MAX_IMAGE_DIMENSION) {
        float widthRatio = ((float) rotatedWidth) / ((float) MAX_IMAGE_DIMENSION);
        float heightRatio = ((float) rotatedHeight) / ((float) MAX_IMAGE_DIMENSION);
        float maxRatio = Math.max(widthRatio, heightRatio);
        Log.e("Bitmap srcBitmap", "srcBitmap");
        // Create the bitmap from file
        BitmapFactory.Options options = new BitmapFactory.Options();
        options.inSampleSize = (int) maxRatio;
        srcBitmap = BitmapFactory.decodeStream(is, null, options);
        Log.e("Create Bitmap", "Creating new bitmap");
    } else {
        srcBitmap = BitmapFactory.decodeStream(is);
    }
    is.close();

    /*
     * if the orientation is not 0 (or -1, which means we don't know), we
     * have to do a rotation.
     */
    if (orientation > 0) {
        Matrix matrix = new Matrix();
        matrix.postRotate(orientation);

        srcBitmap = Bitmap.createBitmap(srcBitmap, 0, 0, srcBitmap.getWidth(),
                srcBitmap.getHeight(), matrix, true);
    }

    String type = context.getContentResolver().getType(photoUri);
    ByteArrayOutputStream baos = new ByteArrayOutputStream();
    if (type.equals("image/png")) {
        srcBitmap.compress(Bitmap.CompressFormat.PNG, 100, baos);
    } else if (type.equals("image/jpg") || type.equals("image/jpeg")) {
        srcBitmap.compress(Bitmap.CompressFormat.JPEG, 100, baos);
    }
    byte[] bMapArray = baos.toByteArray();
    baos.close();
    return bMapArray;
}

public static int getOrientation(Context context, Uri photoUri) {
    /* it's on the external media. */
    Cursor cursor = context.getContentResolver().query(photoUri,
            new String[] { MediaStore.Images.ImageColumns.ORIENTATION }, null, null, null);

    if (cursor.getCount() != 1) {
        return -1;
    }

    cursor.moveToFirst();
    return cursor.getInt(0);
}
 }

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那么，我做错了什么呢？我在网上尝试了很多不同的解决方案，但都不管用。：）

图像的方向存储为EXIF数据。看起来您没有将EXIF数据从原始位图复制到缩放位图

---

您可以使用将相关信息从旧位图复制到新位图。

在我的代码中，我的代码与facebook hackbook中的相同，因此它应该根据方向进行缩放和旋转。我只是不知道如何在这个过程中运行我的图片：）