Android上的FaceBook共享

我无法在facebook上共享我的屏幕。下面是我的代码。 你能帮我拍下我的活动的截图并在facebook的墙上发布吗

public class MainActivity extends Activity {

    // share button
    private ShareButton shareButton;
    // image
    private Bitmap image;
    // counter
    private int counter = 0;
    //private ShareContent shareContent;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        // initialize facebook sdk
        FacebookSdk.sdkInitialize(getApplicationContext());
        setContentView(R.layout.activity_main);

        // share button
        shareButton = (ShareButton) findViewById(R.id.share_btn);
        shareButton.setOnClickListener(new View.OnClickListener() {
            public void onClick(View view) {


                    postPicture();
            }
        });
    }



    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.main, menu);
        return true;
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        // Handle action bar item clicks here. The action bar will
        // automatically handle clicks on the Home/Up button, so long
        // as you specify a parent activity in AndroidManifest.xml.
        int id = item.getItemId();

        // noinspection SimplifiableIfStatement
        if (id == R.id.action_settings) {
            return true;
        }

        return super.onOptionsItemSelected(item);
    }

    public void postPicture() {
        // check counter
        if (counter == 1) {
            // save the screenshot
            View rootView = findViewById(android.R.id.content).getRootView();
            rootView.setDrawingCacheEnabled(true);
            // creates immutable clone of image
            image = Bitmap.createBitmap(rootView.getDrawingCache());
            // destroy
            rootView.destroyDrawingCache();

            // share dialog
            AlertDialog.Builder shareDialog = new AlertDialog.Builder(this);
            shareDialog.setTitle("Share Screen Shot");
            shareDialog.setMessage("Share image to Facebook?");
            shareDialog.setPositiveButton("Yes",
                    new DialogInterface.OnClickListener() {
                        public void onClick(DialogInterface dialog, int which) {
                            // share the image to Facebook
                            SharePhoto photo = new SharePhoto.Builder()
                                    .setBitmap(image).build();
                            SharePhotoContent content = new SharePhotoContent.Builder()
                                    .addPhoto(photo).build();
                            shareButton.setShareContent(content);
                            counter = 1;
                            shareButton.performClick();
                        }
                    });
            shareDialog.setNegativeButton("Cancel",
                    new DialogInterface.OnClickListener() {
                        public void onClick(DialogInterface dialog, int which) {
                            dialog.cancel();
                        }
                    });
            shareDialog.show();
        } else {
            counter = 0;
            shareButton.setShareContent(null);
        }
    }
}

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有错误吗？如果您的设备中安装了AnyDoe facebook本机应用程序，请发布stacktrace是的，但当我按下fshare按钮时，没有显示错误，它只是显示消息“将图像共享到facebook？”我按了“是”，但什么也没发生。我的主要目的是当我按下应用程序上的“共享”按钮时，整个屏幕都会像这样贴在FaceBook的墙上。有错误吗？如果您的设备中安装了AnyDoe facebook本机应用程序，请发布stacktrace是的，但当我按下fshare按钮时，没有显示错误，它只是显示消息“将图像共享到facebook？”我按了“是”，但什么也没发生。我的主要目的是当我按下应用程序上的“共享”按钮时，整个屏幕都会像这样贴在FaceBook的墙上