android.widget.ScrollView Java Examples

protected void updateEditor(EditorActivity context) {
	final CodeEditText code = fragment.getCodeEditText();
	final HorizontalScrollView scrollerX = fragment.getCodeScrollerX();
	final ScrollView scrollerY = fragment.getCodeScroller();
	
	//Update the code area text
	code.setNoUndoText(getText());
	//Update the code area selection
	code.setSelection(getSelectionStart(), getSelectionEnd());
	
	code.post(code::updateBracketMatch);
	
	scrollerX.post(() -> scrollerX.scrollTo(getScrollX(), 0));
	
	scrollerY.post(() -> scrollerY.scrollTo(0, getScrollY()));
	
	context.supportInvalidateOptionsMenu();
}
 

private void scrollToCard(String tag) {


        final int count = getChildCount();
        for (int index = 0; index < count; ++index) {
            View child = getChildAt(index);

            if (tag.equals(child.getTag())) {

                ViewParent parent = getParent();
                if( parent != null && parent instanceof ScrollView ){
                    ((ScrollView)parent).smoothScrollTo(
                            0, child.getTop() - getPaddingTop() - child.getPaddingTop());
                }
                return;
            }
        }
    }
 

public CustomDialog(Context context) {
    super(context);
    items = new ArrayList<>();
    icon = getContext().getResources().getDimensionPixelSize(R.dimen.dimen_32_dp);
    padding = getContext().getResources().getDimensionPixelSize(R.dimen.dimen_8_dp);
    ViewGroup.LayoutParams params = new ViewGroup.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.WRAP_CONTENT);
    container = new LinearLayout(getContext());
    container.setLayoutParams(params);
    container.setBackgroundColor(Color.WHITE);
    container.setOrientation(LinearLayout.VERTICAL);
    container.setPadding(0, padding, 0, padding);
    ScrollView scrollView = new ScrollView(getContext());
    scrollView.addView(container);
    requestWindowFeature(Window.FEATURE_NO_TITLE);
    setContentView(scrollView, params);
    setCancelable(true);
    setCanceledOnTouchOutside(true);
    getWindow().setGravity(Gravity.BOTTOM);
    getWindow().setBackgroundDrawable(new ColorDrawable(android.graphics.Color.TRANSPARENT));
    getWindow().setLayout(WindowManager.LayoutParams.MATCH_PARENT, WindowManager.LayoutParams.WRAP_CONTENT);
    getWindow().getAttributes().windowAnimations = R.style.DialogAnimation;
}
 

@Override
protected void findViews() {
    tvTitle = (TextView) rootView.findViewById(R.id.tv_title);
    tvMsg = (TextView) rootView.findViewById(R.id.tv_msg);
    et1 = (EditText) rootView.findViewById(R.id.et_1);
    et2 = (EditText) rootView.findViewById(R.id.et_2);
    line = (View) rootView.findViewById(R.id.line);
    btn1 = (Button) rootView.findViewById(R.id.btn_1);
    lineBtn2 = (View) rootView.findViewById(R.id.line_btn2);
    btn2 = (Button) rootView.findViewById(R.id.btn_2);
    lineBtn3 = (View) rootView.findViewById(R.id.line_btn3);
    btn3 = (Button) rootView.findViewById(R.id.btn_3);
    llContainerHorizontal = (LinearLayout) rootView.findViewById(R.id.ll_container_horizontal);
    btn1Vertical = (Button) rootView.findViewById(R.id.btn_1_vertical);
    lineBtn2Vertical = (View) rootView.findViewById(R.id.line_btn2_vertical);
    btn2Vertical = (Button) rootView.findViewById(R.id.btn_2_vertical);
    lineBtn3Vertical = (View) rootView.findViewById(R.id.line_btn3_vertical);
    btn3Vertical = (Button) rootView.findViewById(R.id.btn_3_vertical);
    llContainerVertical = (LinearLayout) rootView.findViewById(R.id.ll_container_vertical);
    sv = (ScrollView) rootView.findViewById(R.id.sv);
    llContainerContent = (LinearLayout) rootView.findViewById(R.id.ll_container);
}
 

/**
 * create RootView ，every weex Instance View has a rootView;
 * @see com.taobao.weex.dom.WXDomStatement#createBody(JSONObject)
 */
void createBody(WXComponent component) {
  long start = System.currentTimeMillis();
  component.createView(mGodComponent, -1);
  if (WXEnvironment.isApkDebugable()) {
    WXLogUtils.renderPerformanceLog("createView", (System.currentTimeMillis() - start));
  }
  start = System.currentTimeMillis();
  component.applyLayoutAndEvent(component);
  component.bindData(component);

  if (WXEnvironment.isApkDebugable()) {
    WXLogUtils.renderPerformanceLog("bind", (System.currentTimeMillis() - start));
  }

  if (component instanceof WXScroller) {
    WXScroller scroller = (WXScroller) component;
    if (scroller.getView() instanceof ScrollView) {
      mWXSDKInstance.setRootScrollView((ScrollView) scroller.getView());
    }
  }
  mWXSDKInstance.setRootView(mGodComponent.getRealView());
  if (mWXSDKInstance.getRenderStrategy() != WXRenderStrategy.APPEND_ONCE) {
    mWXSDKInstance.onViewCreated(mGodComponent);
  }
}
 

private void init() {
    mBlurDrawableRelativeLayout = (RelativeLayout) this.findViewById(R.id.blur_drawable_container);
    mBlurDrawableRelativeLayout.getViewTreeObserver().addOnGlobalLayoutListener(new ViewTreeObserver.OnGlobalLayoutListener() {
        @Override
        public void onGlobalLayout() {
            mBlurDrawableRelativeLayout.getViewTreeObserver().removeOnGlobalLayoutListener(this);
            mBlurDrawable = new BlurDrawable(BlurDrawableActivity.this);
            mBlurDrawable.drawableContainerId(R.id.blur_drawable_container)
                    .cornerRadius(10)
                    .blurRadius(10)
                    .overlayColor(Color.parseColor("#64ffffff"))
                    .offset(mBlurDrawableRelativeLayout.getLeft(), mBlurDrawableRelativeLayout.getTop() );
            mBlurDrawableRelativeLayout.setBackgroundDrawable(mBlurDrawable);
        }
    });

    mScrollView = (ScrollView) this.findViewById(R.id.sv);
    mScrollView.getViewTreeObserver().addOnScrollChangedListener(getOnScrollChangedListener());
}
 

@SuppressWarnings("unchecked")
public void notifyDataSetChanged() {
    int currentPageIndex = currentPage;

    container.removeAllViews();

    for (int i = 0; i < controller.getData().size(); i++) {
        View pageView = LayoutInflater.from(getContext()).inflate(controller.getPageLayoutRes(), container, false);
        //添加至主框架View
        container.addView(pageView);
        ScrollView scrollView = (ScrollView) pageView.findViewById(R.id.dvp_scroll_view);
        MDA_PageListLayout pageListLayout = new MDA_PageListLayout(getContext(), controller.getItemLayoutRes());
        //添加View
        scrollView.addView(pageListLayout);
        //设置页面索引
        pageListLayout.setPageIndex(i);
        controller.bindPageData(pageView, i);
        //设置数据
        pageListLayout.setData(controller.getPage(i).getData());
    }

    initDragEvent(DragUtils.DragViewType.ALL);

    scrollToPage(currentPageIndex);
}
 

@SuppressLint("NewApi")
public void smoothScrollBy(int velocityY, int distance, int duration) {
    View scrollableView = getScrollableView();
    if (scrollableView instanceof AbsListView) {
        AbsListView absListView = (AbsListView) scrollableView;
        if (Build.VERSION.SDK_INT >= 21) {
            absListView.fling(velocityY);
        } else {
            absListView.smoothScrollBy(distance, duration);
        }
    } else if (scrollableView instanceof ScrollView) {
        ((ScrollView) scrollableView).fling(velocityY);
    }  else if (scrollableView instanceof NestedScrollView) {
        ((NestedScrollView) scrollableView).fling(velocityY);
    } else if (scrollableView instanceof RecyclerView) {
        ((RecyclerView) scrollableView).fling(0, velocityY);
    } else if (scrollableView instanceof WebView) {
        ((WebView) scrollableView).flingScroll(0, velocityY);
    }
}
 

public void updateView() {
    if (mCurrentView == CurrentView.RECURRENCE_OPTIONS_MENU) {
        mRecurrenceOptionCreator.setVisibility(View.GONE);
        llRecurrenceOptionsMenu.setVisibility(View.VISIBLE);

        // Current repeat option may have changed
        updateFlowLayout(mCurrentRecurrenceOption);

        // reset `scrollY` to 0
        final ScrollView scrollView
                = (ScrollView) llRecurrenceOptionsMenu.findViewById(R.id.svRecurrenceOptionsMenu);
        llRecurrenceOptionsMenu.post(new Runnable() {
            @Override
            public void run() {
                if (scrollView.getScrollY() != 0)
                    scrollView.fullScroll(ScrollView.FOCUS_UP);
            }
        });
    } else if (mCurrentView == CurrentView.RECURRENCE_CREATOR) {
        llRecurrenceOptionsMenu.setVisibility(View.GONE);
        mRecurrenceOptionCreator.setVisibility(View.VISIBLE);
    }
}
 

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
        Bundle savedInstanceState) {
    if (container == null) {
        // We have different layouts, and in one of them this
        // fragment's containing frame doesn't exist.  The fragment
        // may still be created from its saved state, but there is
        // no reason to try to create its view hierarchy because it
        // won't be displayed.  Note this is not needed -- we could
        // just run the code below, where we would create and return
        // the view hierarchy; it would just never be used.
        return null;
    }

    ScrollView scroller = new ScrollView(getActivity());
    TextView text = new TextView(getActivity());
    int padding = (int)TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP,
            4, getActivity().getResources().getDisplayMetrics());
    text.setPadding(padding, padding, padding, padding);
    scroller.addView(text);
    text.setText(Shakespeare.DIALOGUE[getShownIndex()]);
    return scroller;
}
 

/**
 * 将ScrollView转换为Bitmap
 * @param scrollView
 * @return
 */
public static Bitmap convertScrollViewToBitmap(ScrollView scrollView) {
    int h = 0;
    Bitmap bitmap = null;
    // 获取scrollview实际高度
    for (int i = 0; i < scrollView.getChildCount(); i++) {
        h += scrollView.getChildAt(i).getHeight();
        scrollView.getChildAt(i).setBackgroundColor(
                Color.parseColor("#ffffff"));
    }
    // 创建对应大小的bitmap
    bitmap = Bitmap.createBitmap(scrollView.getWidth(), h,
            Bitmap.Config.RGB_565);
    final Canvas canvas = new Canvas(bitmap);
    scrollView.draw(canvas);
    return bitmap;
}
 

private static void scrollToBottom(final ScrollView sv) {
    sv.post(new Runnable() {
        @Override
        public void run() {
            sv.fullScroll(View.FOCUS_DOWN);
        }
    });
}
 

private void scrollTop() {
    final ScrollView scrollView = (ScrollView) this.findViewById(R.id.scrollview);

    scrollView.post(new Runnable() {
        public void run() {
            scrollView.scrollTo(0, 0);
        }
    });
}
 

@Override
public void onViewCreated(View view, @Nullable Bundle savedInstanceState) {
    super.onViewCreated(view, savedInstanceState);

    toolbar = (Toolbar) view.findViewById(R.id.toolbar);
    table = (TableLayout) view.findViewById(R.id.operation_param_table);
    execute = (Button) view.findViewById(R.id.execute);
    cancel = (Button) view.findViewById(R.id.cancel);
    operationDetail = (TextView) view.findViewById(R.id.operation_detail);
    custom = (SwitchCompat) view.findViewById(R.id.custom);
    scroll = (ScrollView) view.findViewById(R.id.scroll);

    resource = getResource();
    operation = getOperation();
    scroll.setVisibility(View.GONE);

    toolbar.setTitle(R.string.operation_confirm_title);

    setOperationDetail();

    BackendClient.of(ConfirmOperationFragment.this).getOperationProperties(new ConfirmOperationFragment.OperationPropertiesCallback(),
            operation, resource);

    execute.setOnClickListener(new ClickListner());
    cancel.setOnClickListener(new ClickListner());

    custom.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
        @Override public void onCheckedChanged(CompoundButton compoundButton, boolean checked) {
            if (checked) {
                scroll.setVisibility(View.VISIBLE);
            } else {
                scroll.setVisibility(View.GONE);
            }
        }
    });
}
 

public View inflateViews() {
    mScrollView = new ScrollView(getActivity());
    ViewGroup.LayoutParams scrollParams = new ViewGroup.LayoutParams(
            ViewGroup.LayoutParams.MATCH_PARENT,
            ViewGroup.LayoutParams.MATCH_PARENT);
    mScrollView.setLayoutParams(scrollParams);

    mLogView = new LogView(getActivity());
    ViewGroup.LayoutParams logParams = new ViewGroup.LayoutParams(scrollParams);
    logParams.height = ViewGroup.LayoutParams.WRAP_CONTENT;
    mLogView.setLayoutParams(logParams);
    mLogView.setClickable(true);
    mLogView.setFocusable(true);
    mLogView.setTypeface(Typeface.MONOSPACE);

    // Want to set padding as 16 dips, setPadding takes pixels.  Hooray math!
    int paddingDips = 16;
    double scale = getResources().getDisplayMetrics().density;
    int paddingPixels = (int) ((paddingDips * (scale)) + .5);
    mLogView.setPadding(paddingPixels, paddingPixels, paddingPixels, paddingPixels);
    mLogView.setCompoundDrawablePadding(paddingPixels);

    mLogView.setGravity(Gravity.BOTTOM);
    mLogView.setTextAppearance(getActivity(), android.R.style.TextAppearance_Holo_Medium);

    mScrollView.addView(mLogView);
    return mScrollView;
}
 

public View inflateViews() {
    mScrollView = new ScrollView(getActivity());
    ViewGroup.LayoutParams scrollParams = new ViewGroup.LayoutParams(
            ViewGroup.LayoutParams.MATCH_PARENT,
            ViewGroup.LayoutParams.MATCH_PARENT);
    mScrollView.setLayoutParams(scrollParams);

    mLogView = new LogView(getActivity());
    ViewGroup.LayoutParams logParams = new ViewGroup.LayoutParams(scrollParams);
    logParams.height = ViewGroup.LayoutParams.WRAP_CONTENT;
    mLogView.setLayoutParams(logParams);
    mLogView.setClickable(true);
    mLogView.setFocusable(true);
    mLogView.setTypeface(Typeface.MONOSPACE);

    // Want to set padding as 16 dips, setPadding takes pixels.  Hooray math!
    int paddingDips = 16;
    double scale = getResources().getDisplayMetrics().density;
    int paddingPixels = (int) ((paddingDips * (scale)) + .5);
    mLogView.setPadding(paddingPixels, paddingPixels, paddingPixels, paddingPixels);
    mLogView.setCompoundDrawablePadding(paddingPixels);

    mLogView.setGravity(Gravity.BOTTOM);
    mLogView.setTextAppearance(getActivity(), android.R.style.TextAppearance_Holo_Medium);

    mScrollView.addView(mLogView);
    return mScrollView;
}
 

private static boolean isScrollViewTop(ScrollView scrollView) {
    if (scrollView != null) {
        int scrollViewY = scrollView.getScrollY();
        return scrollViewY <= 0;
    }
    return false;
}
 

@Override
public void onWindowFocusChanged(boolean hasFocus) {
	super.onWindowFocusChanged(hasFocus);
	if (hasFocus && !scroll_locked) {
		logOutView.setSelection(logOutView.getText().length());
		scrollView.fullScroll(ScrollView.FOCUS_DOWN);
	}
}
 

/**
 * todo.mb: consider refactoring to common logic with attributes and so on.
 */
private void addSmsTemplate(SmsTemplate t) {
    View v = x.inflater.new Builder(smsTemplatesLayout, R.layout.select_entry_simple_minus).withId(R.id.edit_sms_template, this).create();
    setSmsTemplateData(v, t);
    ImageView minusImageView = v.findViewById(R.id.plus_minus);
    minusImageView.setId(R.id.remove_sms_template);
    minusImageView.setOnClickListener(this);
    minusImageView.setTag(t.id);
    v.setTag(t);
    scrollView.fullScroll(ScrollView.FOCUS_DOWN);
}
 

protected void bindViews(View view) {
    swipeContainer = (SwipeRefreshLayout )view.findViewById(R.id.swipe_container);
    noSearchResultLayout = (ScrollView )view.findViewById(R.id.no_search_results_layout);
    searchButton = (ImageView )view.findViewById(R.id.ic_search_button);
    searchQuery = (EditText )view.findViewById(R.id.search_text);
    progressBar = (ProgressBar )view.findViewById(R.id.progress_bar);
    layoutNoNetwork = (ScrollView )view.findViewById(R.id.no_network_connection);
    layoutError = (ScrollView )view.findViewById(R.id.error);
    retryError = (TextView )view.findViewById(R.id.retry_error);
    retryNoNetwork = (TextView )view.findViewById(R.id.retry_no_network);
}
 

@Nullable
@Override
public View onCreateView(@NonNull LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
    ScrollView layout = (ScrollView) inflater.inflate(R.layout.fragment_root_nameserver, container, false);

    Bundle args = getArguments();
    Domain.RootNameserver root;
    if (getContext() == null || args == null || (root = (Domain.RootNameserver) args.getSerializable("root")) == null)
        return null;

    SuperTextView name = layout.findViewById(R.id.rootNsFragment_name);
    Utils.clickToCopy(name);
    name.setText(root.name);

    SuperTextView rtt = layout.findViewById(R.id.rootNsFragment_rtt);
    rtt.setHtml(R.string.rtt, Utils.formatRTT(root.rtt));

    final LinearLayout nameservers = layout.findViewById(R.id.rootNsFragment_nameservers);
    for (String nameserver : root.nameservers) {
        TextView text = (TextView) inflater.inflate(R.layout.item_secondary_text, nameservers, false);
        text.setText(nameserver);
        Utils.clickToCopy(text);

        nameservers.addView(text);
    }

    final ImageButton toggleNs = layout.findViewById(R.id.rootNsFragment_toggleNs);
    toggleNs.setOnClickListener(v -> CommonUtils.handleCollapseClick(toggleNs, nameservers));

    GlueView glue = layout.findViewById(R.id.rootNsFragment_glue);
    glue.setGlue(root.glue);

    return layout;
}
 

public View inflateViews() {
    mScrollView = new ScrollView(getActivity());
    ViewGroup.LayoutParams scrollParams = new ViewGroup.LayoutParams(
            ViewGroup.LayoutParams.MATCH_PARENT,
            ViewGroup.LayoutParams.MATCH_PARENT);
    mScrollView.setLayoutParams(scrollParams);

    mLogView = new LogView(getActivity());
    ViewGroup.LayoutParams logParams = new ViewGroup.LayoutParams(scrollParams);
    logParams.height = ViewGroup.LayoutParams.WRAP_CONTENT;
    mLogView.setLayoutParams(logParams);
    mLogView.setClickable(true);
    mLogView.setFocusable(true);
    mLogView.setTypeface(Typeface.MONOSPACE);

    // Want to set padding as 16 dips, setPadding takes pixels.  Hooray math!
    int paddingDips = 16;
    double scale = getResources().getDisplayMetrics().density;
    int paddingPixels = (int) ((paddingDips * (scale)) + .5);
    mLogView.setPadding(paddingPixels, paddingPixels, paddingPixels, paddingPixels);
    mLogView.setCompoundDrawablePadding(paddingPixels);

    mLogView.setGravity(Gravity.BOTTOM);
    mLogView.setTextAppearance(getActivity(), android.R.style.TextAppearance_Holo_Medium);

    mScrollView.addView(mLogView);
    return mScrollView;
}
 

public View inflateViews() {
    mScrollView = new ScrollView(getActivity());
    ViewGroup.LayoutParams scrollParams = new ViewGroup.LayoutParams(
            ViewGroup.LayoutParams.MATCH_PARENT,
            ViewGroup.LayoutParams.MATCH_PARENT);
    mScrollView.setLayoutParams(scrollParams);

    mLogView = new LogView(getActivity());
    ViewGroup.LayoutParams logParams = new ViewGroup.LayoutParams(scrollParams);
    logParams.height = ViewGroup.LayoutParams.WRAP_CONTENT;
    mLogView.setLayoutParams(logParams);
    mLogView.setClickable(true);
    mLogView.setFocusable(true);
    mLogView.setTypeface(Typeface.MONOSPACE);

    // Want to set padding as 16 dips, setPadding takes pixels.  Hooray math!
    int paddingDips = 16;
    double scale = getResources().getDisplayMetrics().density;
    int paddingPixels = (int) ((paddingDips * (scale)) + .5);
    mLogView.setPadding(paddingPixels, paddingPixels, paddingPixels, paddingPixels);
    mLogView.setCompoundDrawablePadding(paddingPixels);

    mLogView.setGravity(Gravity.BOTTOM);
    mLogView.setTextAppearance(getActivity(), android.R.style.TextAppearance_Holo_Medium);

    mScrollView.addView(mLogView);
    return mScrollView;
}
 

protected boolean isReadyForPullEnd() {
    View scrollViewChild = ((ScrollView) this.mRefreshableView).getChildAt(0);
    if (scrollViewChild == null) {
        return false;
    }
    if (((ScrollView) this.mRefreshableView).getScrollY() >= scrollViewChild.getHeight() - getHeight()) {
        return true;
    }
    return false;
}
 

@Override protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_base);

    ScrollView scrollView = (ScrollView) findViewById(R.id.scrollView);

    if (scrollView != null) {
        scrollView.addView(LayoutInflater.from(this).inflate(getContentLayoutId(), scrollView, false));
    }

    ButterKnife.bind(this);
}
 

public static ScrollView.LayoutParams createScroll(int width, int height, int gravity, float leftMargin, float topMargin, float rightMargin, float bottomMargin) {
    ScrollView.LayoutParams layoutParams = new ScrollView.LayoutParams(getSize(width), getSize(height), gravity);
    layoutParams.leftMargin = AndroidUtilities.dp(leftMargin);
    layoutParams.topMargin = AndroidUtilities.dp(topMargin);
    layoutParams.rightMargin = AndroidUtilities.dp(rightMargin);
    layoutParams.bottomMargin = AndroidUtilities.dp(bottomMargin);
    return layoutParams;
}
 

public BotKeyboardView(Context context) {
    super(context);

    setOrientation(VERTICAL);

    scrollView = new ScrollView(context);
    addView(scrollView);
    container = new LinearLayout(context);
    container.setOrientation(VERTICAL);
    scrollView.addView(container);
    AndroidUtilities.setScrollViewEdgeEffectColor(scrollView, Theme.getColor(Theme.key_chat_emojiPanelBackground));

    setBackgroundColor(Theme.getColor(Theme.key_chat_emojiPanelBackground));
}
 

public View inflateViews() {
    mScrollView = new ScrollView(getActivity());
    ViewGroup.LayoutParams scrollParams = new ViewGroup.LayoutParams(
            ViewGroup.LayoutParams.MATCH_PARENT,
            ViewGroup.LayoutParams.MATCH_PARENT);
    mScrollView.setLayoutParams(scrollParams);

    mLogView = new LogView(getActivity());
    ViewGroup.LayoutParams logParams = new ViewGroup.LayoutParams(scrollParams);
    logParams.height = ViewGroup.LayoutParams.WRAP_CONTENT;
    mLogView.setLayoutParams(logParams);
    mLogView.setClickable(true);
    mLogView.setFocusable(true);
    mLogView.setTypeface(Typeface.MONOSPACE);

    // Want to set padding as 16 dips, setPadding takes pixels.  Hooray math!
    int paddingDips = 16;
    double scale = getResources().getDisplayMetrics().density;
    int paddingPixels = (int) ((paddingDips * (scale)) + .5);
    mLogView.setPadding(paddingPixels, paddingPixels, paddingPixels, paddingPixels);
    mLogView.setCompoundDrawablePadding(paddingPixels);

    mLogView.setGravity(Gravity.BOTTOM);
    mLogView.setTextAppearance(getActivity(), android.R.style.TextAppearance_Holo_Medium);

    mScrollView.addView(mLogView);
    return mScrollView;
}
 

public void testResponderLocksScrollView() {
  ScrollView scrollView = getViewByTestId("scroll_view");
  assertNotNull(scrollView);
  assertEquals(0, scrollView.getScrollY());

  float inpx40dp = PixelUtil.toPixelFromDIP(40f);
  float inpx100dp = PixelUtil.toPixelFromDIP(100f);

  SingleTouchGestureGenerator gestureGenerator = createGestureGenerator();

  gestureGenerator
      .startGesture(30, 30 + inpx100dp)
      .dragTo(30 + inpx40dp, 30, 10, 1200)
      .endGesture(180, 100);

  waitForBridgeAndUIIdle();

  assertTrue("Expected to scroll by at least 80 dp", scrollView.getScrollY() >= inpx100dp * .8f);

  int previousScroll = scrollView.getScrollY();

  gestureGenerator
      .startGesture(30, 30 + inpx100dp)
      .dragTo(30 + inpx40dp, 30 + inpx100dp, 10, 1200);

  waitForBridgeAndUIIdle();

  gestureGenerator
      .dragTo(30 + inpx40dp, 30, 10, 1200)
      .endGesture();

  waitForBridgeAndUIIdle();
  assertEquals("Expected not to scroll", scrollView.getScrollY(), previousScroll);

}
 

/**
 * Updates the state of the simulation controls and the values displayed.
 * Updates the enabled/disabled states of the simulation controls.
 * It also refreshes the values displayed in the tables and the datapath,
 * and scrolls the assembled code table to make the current instruction visible.
 */
private void refreshValues() {
	updateStepBackEnabled();
	updateStepEnabled();

	refreshRegistersTableValues();
	refreshDataMemoryTableValues();
	refreshAssembledCodeTableValues();
	refreshExecTableValues();
	if(datapath != null) datapath.refresh();

	// Scroll the assembled code table to the current instruction
	int index = getCPU().getPC().getCurrentInstructionIndex();
	if(index >= 0) {
		final ScrollView scroll = (ScrollView)findViewById(R.id.tblAssembledCodeScroll);
		final View row = tblAssembledCode.getChildAt(index + 1);

		// Scroll only if the row is out of view
		if(row != null && (row.getTop() < scroll.getScrollY() ||
		                   row.getBottom() > (scroll.getScrollY() + scroll.getHeight()))) {
			scroll.post(new Runnable() {
				@Override
				public void run() {
					if(row.getTop() < scroll.getScrollY()) {
						// Row is above the visible area
						// > scroll up until the row is visible at the top of the ScrollView
						scroll.smoothScrollTo(0, row.getTop());
					}
					else {
						// Row is below the visible area
						// > scroll down until the row is visible at the bottom of the ScrollView
						scroll.smoothScrollTo(0, row.getBottom() - scroll.getHeight());
					}
				}
			});
		}
	}
}