Question

尝试在Android中自定义Facebook的共享对话框时遇到了一些问题。基本上我要做的是从ImageView组件获取可绘制图像，然后将其作为参数传递到我的共享对话框中。以下是我将图像设置为ImageView的代码：

ivEventDtl.setImageDrawable(EventDrawableImage.resizeEventDetailImage(
            eventModel.getEventPic(), context));

这个是在onCreate（）中完成的。 eventModel.getEventPic（）是一个字符串。然后当点击我的facebook按钮时，我正在执行此操作：

@SuppressWarnings("deprecation")
public void postToWall() {
    Bundle params = new Bundle();  
    params.putString("name", txtEventDtlName.getText().toString());
    params.putString("caption", "Date: " + txtEventDtlDate.getText().toString());
    params.putString("link", "");
    params.putString("description", txtEventDtlDesc.getText().toString());
    //params.putString("picture", "http://twitpic.com/show/thumb/6hqd44");
    try {
        params.putByteArray("picture", EventDrawableImage.extractBytes(ivEventDtl.getDrawable()));
    } catch (IOException e1) {
        e1.printStackTrace();
    }
    facebook.dialog(getActivity(), "feed", params, new DialogListener() {

        public void onFacebookError(FacebookError e) {
        }

        public void onError(DialogError e) {
        }

        public void onComplete(Bundle values) {
        }

        public void onCancel() {
        }
    });

}

将drawable转换为字节数组的方法：

public static byte[] extractBytes(Drawable image) throws IOException {
    Bitmap bitmap = ((BitmapDrawable) image).getBitmap();
    ByteArrayOutputStream stream = new ByteArrayOutputStream();
    bitmap.compress(Bitmap.CompressFormat.JPEG, 100, stream);
    byte[] bitmapdata = stream.toByteArray();
    return bitmapdata;
}

如果我用URL硬编码图片，它工作正常。当我将其更改为convert drawable到byte array 1时，共享对话框中的所有参数都不会显示。有什么想法吗？

提前致谢。

修改我修改了代码以获取图片字符串并调整大小超过200x200然后将其转换为位图，然后将其作为参数传递：

Drawable image = EventDrawableImage.resizeShareDialogueImage(eventPicPath, context);
Bitmap bitmap = EventDrawableImage.drawableToBitmap(image);

public static Drawable resizeShareDialogueImage(String eventPic,
        Context context) {
    String uri = "@drawable/" + eventPic;
    int imageResource = context.getResources().getIdentifier(uri, null,
            context.getPackageName());
    Drawable res = context.getResources().getDrawable(imageResource);
    Bitmap bitmap = ((BitmapDrawable) res).getBitmap();
    Drawable d = new BitmapDrawable(context.getResources(),
            Bitmap.createScaledBitmap(bitmap, 250, 250, true));
    return d;
}

public static Bitmap drawableToBitmap (Drawable drawable) {
    if (drawable instanceof BitmapDrawable) {
        return ((BitmapDrawable)drawable).getBitmap();
    }

    Bitmap bitmap = Bitmap.createBitmap(drawable.getIntrinsicWidth(), drawable.getIntrinsicHeight(), Config.ARGB_8888);
    Canvas canvas = new Canvas(bitmap); 
    drawable.setBounds(0, 0, canvas.getWidth(), canvas.getHeight());
    drawable.draw(canvas);

    return bitmap;
}

public void postToWall() {
    Drawable image = EventDrawableImage.resizeShareDialogueImage(eventPicPath, context);

    Bitmap bitmap = EventDrawableImage.drawableToBitmap(image);

    final Bundle params = new Bundle();  
    params.putString("name", txtEventDtlName.getText().toString());
    params.putString("caption", "Date: " + txtEventDtlDate.getText().toString());
    params.putString("link", "");
    params.putString("description", txtEventDtlDesc.getText().toString());
    params.putParcelable("picture", bitmap);
    //params.putString("picture", "http://twitpic.com/show/thumb/6hqd44");
    Request request = new Request(Session.getActiveSession(), "me/photos", params, HttpMethod.POST, new Request.Callback()
    {
        public void onCompleted(Response response)
        {
            facebook.dialog(getActivity(), "feed", params, new DialogListener() {

                public void onFacebookError(FacebookError e) {
                }

                public void onError(DialogError e) {
                }

                public void onComplete(Bundle values) {
                }

                public void onCancel() {
                }
            });
        }
    });

    RequestAsyncTask task = new RequestAsyncTask(request);
    task.execute();
}

Answer 1

您无法直接在params中传递图像位图，您必须传递URI。 URI必须指向facebook应用程序可以访问的资源。您可以从位图中快速获取URI，如下所示：

String path = MediaStore.Images.Media.insertImage(getContentResolver(), bitmap, "temp", "Test Image");
params.putString("picture", path);

使用它而不是直接将图片设置为位图或位图字节。

Answer 2

Feed对话框不支持＆＃34;图片＆＃34;的二进制数据。参数。它必须是互联网可寻址的URL（即不是本地文件）。

有关详细信息，请参阅https://developers.facebook.com/docs/sharing/reference/feed-dialog/v2.2。

Java将drawable转换为bytearray

2 个答案: