Example usage for android.view ViewGroup getChildCount

Introduction

In this page you can find the example usage for android.view ViewGroup getChildCount.

Prototype

public int getChildCount() 

Source Link

Document

Returns the number of children in the group.

Usage

From source file:com.along.practice.widget.swipbacklayout.ViewDragHelper.java

/**
 * Tests scrollability within child views of v given a delta of dx.
 *
 * @param v      View to test for horizontal scrollability
 * @param checkV Whether the view v passed should itself be checked for
 *               scrollability (true), or just its children (false).
 * @param dx     Delta scrolled in pixels along the X axis
 * @param dy     Delta scrolled in pixels along the Y axis
 * @param x      X coordinate of the active touch point
 * @param y      Y coordinate of the active touch point
 * @return true if child views of v can be scrolled by delta of dx.
 *//*from   ww w.  ja v  a2  s . co  m*/
protected boolean canScroll(View v, boolean checkV, int dx, int dy, int x, int y) {
    if (v instanceof ViewGroup) {
        final ViewGroup group = (ViewGroup) v;
        final int scrollX = v.getScrollX();
        final int scrollY = v.getScrollY();
        final int count = group.getChildCount();
        // Count backwards - let topmost views consume scroll distance
        // first.
        for (int i = count - 1; i >= 0; i--) {
            //  Add versioned support here for transformed views.
            // This will not work for transformed views in Honeycomb+
            final View child = group.getChildAt(i);
            if (x + scrollX >= child.getLeft() && x + scrollX < child.getRight()
                    && y + scrollY >= child.getTop() && y + scrollY < child.getBottom() && canScroll(child,
                            true, dx, dy, x + scrollX - child.getLeft(), y + scrollY - child.getTop())) {
                return true;
            }
        }
    }

    return checkV && (ViewCompat.canScrollHorizontally(v, -dx) || ViewCompat.canScrollVertically(v, -dy));
}

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From source file:com.example.zhaozhu.practisecustomview.customviewgroup.HSlidingPaneLayout.java

/**
 * Tests scrollability within child views of v given a delta of dx.
 *
 * @param v      View to test for horizontal scrollability
 * @param checkV Whether the view v passed should itself be checked for
 *               scrollability (true), or just its children (false).
 * @param dx     Delta scrolled in pixels
 * @param x      X coordinate of the active touch point
 * @param y      Y coordinate of the active touch point
 * @return true if child views of v can be scrolled by delta of dx.
 *//*from  w w w . ja va 2s .c  om*/
protected boolean canScroll(final View v, final boolean checkV, final int dx, final int x, final int y) {
    if (v instanceof ViewGroup) {
        final ViewGroup group = (ViewGroup) v;
        final int scrollX = v.getScrollX();
        final int scrollY = v.getScrollY();
        final int count = group.getChildCount();
        // Count backwards - let topmost views consume scroll distance
        // first.
        for (int i = count - 1; i >= 0; i--) {
            // TODO: Add versioned support here for transformed views.
            // This will not work for transformed views in Honeycomb+
            final View child = group.getChildAt(i);
            if (((x + scrollX) >= child.getLeft()) && ((x + scrollX) < child.getRight())
                    && ((y + scrollY) >= child.getTop()) && ((y + scrollY) < child.getBottom())
                    && this.canScroll(child, true, dx, (x + scrollX) - child.getLeft(),
                            (y + scrollY) - child.getTop())) {
                return true;
            }
        }
    }

    return checkV && ViewCompat.canScrollHorizontally(v, -dx);
}

---

From source file:com.youle.gamebox.ui.view.SlidingPaneLayout.java

/**
 * Tests scrollability within child views of v given a delta of dx.
 *
 * @param v View to test for horizontal scrollability
 * @param checkV Whether the view v passed should itself be checked for scrollability (true),
 *               or just its children (false).
 * @param dx Delta scrolled in pixels//from  w w w .j a  v a 2  s  .  co  m
 * @param x X coordinate of the active touch point
 * @param y Y coordinate of the active touch point
 * @return true if child views of v can be scrolled by delta of dx.
 */
protected boolean canScroll(View v, boolean checkV, int dx, int x, int y) {
    if (v instanceof ViewGroup) {
        final ViewGroup group = (ViewGroup) v;
        final int scrollX = v.getScrollX();
        final int scrollY = v.getScrollY();
        final int count = group.getChildCount();
        // Count backwards - let topmost views consume scroll distance first.
        for (int i = count - 1; i >= 0; i--) {
            // TODO: Add versioned support here for transformed views.
            // This will not work for transformed views in Honeycomb+
            final View child = group.getChildAt(i);
            //                if(!child.isAttachedToWindow()) continue;
            if (x + scrollX >= child.getLeft() && x + scrollX < child.getRight()
                    && y + scrollY >= child.getTop() && y + scrollY < child.getBottom() && canScroll(child,
                            true, dx, x + scrollX - child.getLeft(), y + scrollY - child.getTop())) {
                return true;
            }
        }
    }

    return checkV && (ViewCompat.canScrollHorizontally(v, -dx)
            || ((v instanceof ViewPager) && canViewPagerScrollHorizontally((ViewPager) v, -dx)));
}

---

From source file:org.de.jmg.learn.SettingsActivity.java

private void resize(float scale) {
    //if (scale == 0 && mScale!=1) return;
    Resources resources = _main.getResources();
    DisplayMetrics metrics = resources.getDisplayMetrics();
    @SuppressWarnings("unused")
    int Density = metrics.densityDpi;
    try {/*from   ww  w  .  ja  v a  2  s.c  om*/
        int width = mainView.getWidth();
        if (width > 500) {
            width -= lib.dpToPx(40);
        } else {
            width -= lib.dpToPx(40);
        }
        if (scale == 0) {
            mainView.setVisibility(View.INVISIBLE);
            libLearn.gStatus = "Calculating Scale";

            float scale1 = width / (float) (_main.isSmallDevice ? 0
                    : (findViewById(R.id.txtCharsetASCII)).getWidth() + spnASCII.getWidth() + width / 30);
            float scale2 = width / (float) (_main.isSmallDevice ? 0
                    : (findViewById(R.id.txtSounds)).getWidth() + spnSounds.getWidth() + width / 30);
            float scale3 = width / (float) (_main.isSmallDevice ? 0
                    : (findViewById(R.id.txtCharsetASCII)).getWidth() + spnASCII.getWidth() + width / 30);
            scale = (scale1 < scale2) ? scale1 : scale2;
            scale = (scale3 < scale) ? scale3 : scale;
        }
        mScale = scale;

        ViewGroup Settings = (ViewGroup) findViewById(R.id.layoutSettings);
        libLearn.gStatus = "Enumerating ChildViews";
        int ChildCount = Settings.getChildCount();
        for (int i = 0; i < ChildCount; i++) {
            if (i > 100)
                break;
            libLearn.gStatus = "getting view " + i;
            View V = Settings.getChildAt(i);
            /*
            CharSequence cs = V.getContentDescription();
            if (cs != null && cs.length()>0 )
            {
               V.setOnLongClickListener(ViewOnLongClickCD);
            }
            */
            RelativeLayout.LayoutParams params = (android.widget.RelativeLayout.LayoutParams) V
                    .getLayoutParams();

            params.topMargin = (int) (params.topMargin * scale);
            params.bottomMargin = (int) (params.bottomMargin * scale);

            if (params.height > 0)
                params.height = (int) (params.height * scale);
            if (V instanceof CheckBox) {
                if (params.width > 0)
                    params.width = ((width - lib.dpToPx(10)) / 3);
            } else {
                if (params.width > 0)
                    params.width = (int) (params.width * scale);
            }
            /*
            if (V == spnSounds) {
               int soundsHeight = spnSounds.getHeight();
               float margin = (float) ((soundsHeight * scale) / 5.25);
               params.topMargin = params.topMargin + (int) margin;
            }
            */
            libLearn.gStatus = "Setting Layoutparams";
            V.setLayoutParams(params);
            // }
            if (V instanceof TextView && !(V instanceof CheckBox)) {
                libLearn.gStatus = "TextView set size";
                TextView t = (TextView) V;
                t.setTextSize(TypedValue.COMPLEX_UNIT_PX, t.getTextSize() * scale);
            } else if (V instanceof Spinner) {
                Spinner spn = (Spinner) V;
                SpinnerAdapter A = spn.getAdapter();
                if (A instanceof AbstractScaledArrayAdapter<?>) {
                    libLearn.gStatus = "Scaling Adapter";
                    AbstractScaledArrayAdapter<?> AA = (AbstractScaledArrayAdapter<?>) A;
                    AA.Scale = AA.Scale * scale;
                    if (spn.getSelectedItemPosition() > -1) {
                        AA.notifyDataSetChanged();
                    }

                }
            } else if (V instanceof CheckBox) {
                libLearn.gStatus = "CheckBox";
                CheckBox c = (CheckBox) V;
                //c.setScaleX(scale);
                //c.setScaleY(scale);
                // c.setle
                c.setTextSize(TypedValue.COMPLEX_UNIT_PX, c.getTextSize() * scale);

                /*
                int p1 = c.getPaddingTop();
                int p2 = c.getPaddingBottom();
                int p3 = c.getPaddingLeft();
                int p4 = c.getPaddingRight();
                c.setPadding((int) (p3/scale), p1, p4, p2);
                */
                //LevelListDrawable D = (LevelListDrawable) c.getBackground();
                /*
                Drawable d = c.getBackground();
                Log.d("bounds", d.getBounds().toString());
                */
                //d.setTargetDensity((int) (Density * scale));
                //d.setBounds(0, 0, c.getHeight(), c.getHeight());
                //lib.setBgCheckBox(c,d);
                /*
                ViewGroup check = (ViewGroup) V;
                for (int ii = 0; ii<check.getChildCount(); ii++)
                {
                   View cv = check.getChildAt(ii);
                   String cls = cv.getClass().getName();
                   Log.d("Classs", cls);
                }
                */
                // Drawable d = lib.getDefaultCheckBoxDrawable(_main);
                // d = new ScaleDrawable(d, 0, c.getHeight()*scale,
                // c.getHeight()*scale).getDrawable();
                // float scaleC = (float)c.getHeight()/d.getBounds().height();
                // d.setBounds(0, 0,(int) (c.getHeight()*scale),(int)
                // (c.getHeight()*scale));
                // LayerDrawable L = new LayerDrawable(new Drawable[]{d});
                // d = lib.scaleImage(_main, d, scaleC);
                // /c.setButtonDrawable(d);
            }
        }
        /*
        libLearn.gStatus="Buttons";
        Button b = (Button) findViewById(R.id.btnOK);
        RelativeLayout.LayoutParams params = (android.widget.RelativeLayout.LayoutParams) b
              .getLayoutParams();
        params.topMargin = (int) (params.topMargin * scale);
        if (params.height>0)params.height = (int) (params.height * scale);
        if (params.width>0)params.width = (int) (params.width * scale);
        b.setLayoutParams(params);
        b.setTextSize(TypedValue.COMPLEX_UNIT_PX, b.getTextSize() * scale);
                
        b = (Button) findViewById(R.id.btnCancel);
        params = (android.widget.RelativeLayout.LayoutParams) b
              .getLayoutParams();
        params.topMargin = (int) (params.topMargin * scale);
        if (params.height>0)params.height = (int) (params.height * scale);
        if (params.width>0)params.width = (int) (params.width * scale);
        b.setLayoutParams(params);
        b.setTextSize(TypedValue.COMPLEX_UNIT_PX, b.getTextSize() * scale);
        */
        SettingsView.getViewTreeObserver()
                .addOnGlobalLayoutListener(new ViewTreeObserver.OnGlobalLayoutListener() {

                    @Override
                    public void onGlobalLayout() {
                        // Ensure you call it only once :
                        lib.removeLayoutListener(SettingsView.getViewTreeObserver(), this);
                        int pos = spnASCII.getSelectedItemPosition();
                        spnASCII.setSelection(-1);
                        spnASCII.setSelection(pos);
                    }
                });

    } catch (Exception ex) {
        lib.ShowException(_main, ex);
    } finally {
        mainView.setVisibility(View.VISIBLE);
    }

}

---

From source file:com.xiaosu.lib.base.widget.drawerLayout.DrawerLayout.java

private boolean isDrawerViewOrChild(View child) {
    if (child == mDrawerView)
        return true;

    if (mDrawerView instanceof ViewGroup) {
        ViewGroup parent = (ViewGroup) mDrawerView;
        int count = parent.getChildCount();
        for (int i = 0; i < count; i++) {
            if (parent.getChildAt(i) == child)
                return true;
        }/*w ww .j a  v a  2  s.  c o  m*/
    }
    return false;
}

---

From source file:com.xiaosu.lib.base.widget.drawerLayout.DrawerLayout.java

View findTopChildUnder(View view, int x, int y) {
    if (view instanceof ViewGroup) {
        ViewGroup parent = (ViewGroup) view;
        final int childCount = parent.getChildCount();
        for (int i = childCount - 1; i >= 0; i--) {
            final View child = parent.getChildAt(i);
            if (x >= child.getLeft() && x < child.getRight() && y >= child.getTop() && y < child.getBottom()) {
                return child;
            }// ww w .  j  a v  a2 s.c  o  m
        }
    }
    return null;
}

---

From source file:com.baidayi.swipback.ViewDragHelper.java

/**
 * Tests scrollability within child views of v given a delta of dx.
 * /*w w  w .  ja  v a 2s  .  c o  m*/
 * @param v
 *            View to test for horizontal scrollability
 * @param checkV
 *            Whether the view v passed should itself be checked for
 *            scrollability (true), or just its children (false).
 * @param dx
 *            Delta scrolled in pixels along the X axis
 * @param dy
 *            Delta scrolled in pixels along the Y axis
 * @param x
 *            X coordinate of the active touch point
 * @param y
 *            Y coordinate of the active touch point
 * @return true if child views of v can be scrolled by delta of dx.
 */
protected boolean canScroll(View v, boolean checkV, int dx, int dy, int x, int y) {
    if (v instanceof ViewGroup) {
        final ViewGroup group = (ViewGroup) v;
        final int scrollX = v.getScrollX();
        final int scrollY = v.getScrollY();
        final int count = group.getChildCount();
        // Count backwards - let topmost views consume scroll distance
        // first.
        for (int i = count - 1; i >= 0; i--) {
            // This will not work for transformed views in Honeycomb+
            final View child = group.getChildAt(i);
            if (x + scrollX >= child.getLeft() && x + scrollX < child.getRight()
                    && y + scrollY >= child.getTop() && y + scrollY < child.getBottom() && canScroll(child,
                            true, dx, dy, x + scrollX - child.getLeft(), y + scrollY - child.getTop())) {
                return true;
            }
        }
    }

    return checkV && (ViewCompat.canScrollHorizontally(v, -dx) || ViewCompat.canScrollVertically(v, -dy));
}

---

From source file:android.improving.utils.views.swipeback.ViewDragHelper.java

/**
 * Tests scrollability within child views of v given a delta of dx.
 * /*from  ww w.j a v  a 2 s  .  c o m*/
 * @param v
 *            View to test for horizontal scrollability
 * @param checkV
 *            Whether the view v passed should itself be checked for
 *            scrollability (true), or just its children (false).
 * @param dx
 *            Delta scrolled in pixels along the X axis
 * @param dy
 *            Delta scrolled in pixels along the Y axis
 * @param x
 *            X coordinate of the active touch point
 * @param y
 *            Y coordinate of the active touch point
 * @return true if child views of v can be scrolled by delta of dx.
 */
protected boolean canScroll(View v, boolean checkV, int dx, int dy, int x, int y) {
    if (v instanceof ViewGroup) {
        final ViewGroup group = (ViewGroup) v;
        final int scrollX = v.getScrollX();
        final int scrollY = v.getScrollY();
        final int count = group.getChildCount();
        // Count backwards - let topmost views consume scroll distance
        // first.
        for (int i = count - 1; i >= 0; i--) {
            // TODO: Add versioned support here for transformed views.
            // This will not work for transformed views in Honeycomb+
            final View child = group.getChildAt(i);
            if (x + scrollX >= child.getLeft() && x + scrollX < child.getRight()
                    && y + scrollY >= child.getTop() && y + scrollY < child.getBottom() && canScroll(child,
                            true, dx, dy, x + scrollX - child.getLeft(), y + scrollY - child.getTop())) {
                return true;
            }
        }
    }

    return checkV && (ViewCompat.canScrollHorizontally(v, -dx) || ViewCompat.canScrollVertically(v, -dy));
}

---

From source file:android.support.v7.preference.Preference.java

/**
 * Makes sure the view (and any children) get the enabled state changed.
 *//*from ww  w .j  a  v a  2 s . com*/
private void setEnabledStateOnViews(View v, boolean enabled) {
    v.setEnabled(enabled);

    if (v instanceof ViewGroup) {
        final ViewGroup vg = (ViewGroup) v;
        for (int i = vg.getChildCount() - 1; i >= 0; i--) {
            setEnabledStateOnViews(vg.getChildAt(i), enabled);
        }
    }
}

---

From source file:android.support.transition.Transition.java

/**
 * Recursive method which captures values for an entire view hierarchy,
 * starting at some root view. Transitions without targetIDs will use this
 * method to capture values for all possible views.
 *
 * @param view The view for which to capture values. Children of this View
 * will also be captured, recursively down to the leaf nodes.
 * @param start true if values are being captured in the start scene, false
 * otherwise.//w ww  . j a va2 s.c o m
 */
private void captureHierarchy(View view, boolean start) {
    if (view == null) {
        return;
    }
    boolean isListViewItem = false;
    if (view.getParent() instanceof ListView) {
        isListViewItem = true;
    }
    if (isListViewItem && !((ListView) view.getParent()).getAdapter().hasStableIds()) {
        // ignore listview children unless we can track them with stable IDs
        return;
    }
    int id = View.NO_ID;
    long itemId = View.NO_ID;
    if (!isListViewItem) {
        id = view.getId();
    } else {
        ListView listview = (ListView) view.getParent();
        int position = listview.getPositionForView(view);
        itemId = listview.getItemIdAtPosition(position);
        ViewCompat.setHasTransientState(view, true);
    }
    if (mTargetIdExcludes != null && mTargetIdExcludes.contains(id)) {
        return;
    }
    if (mTargetExcludes != null && mTargetExcludes.contains(view)) {
        return;
    }
    if (mTargetTypeExcludes != null && view != null) {
        int numTypes = mTargetTypeExcludes.size();
        for (int i = 0; i < numTypes; ++i) {
            if (mTargetTypeExcludes.get(i).isInstance(view)) {
                return;
            }
        }
    }
    TransitionValues values = new TransitionValues();
    values.view = view;
    if (start) {
        captureStartValues(values);
    } else {
        captureEndValues(values);
    }
    if (start) {
        if (!isListViewItem) {
            mStartValues.viewValues.put(view, values);
            if (id >= 0) {
                mStartValues.idValues.put((int) id, values);
            }
        } else {
            mStartValues.itemIdValues.put(itemId, values);
        }
    } else {
        if (!isListViewItem) {
            mEndValues.viewValues.put(view, values);
            if (id >= 0) {
                mEndValues.idValues.put((int) id, values);
            }
        } else {
            mEndValues.itemIdValues.put(itemId, values);
        }
    }
    if (view instanceof ViewGroup) {
        // Don't traverse child hierarchy if there are any child-excludes on this view
        if (mTargetIdChildExcludes != null && mTargetIdChildExcludes.contains(id)) {
            return;
        }
        if (mTargetChildExcludes != null && mTargetChildExcludes.contains(view)) {
            return;
        }
        if (mTargetTypeChildExcludes != null && view != null) {
            int numTypes = mTargetTypeChildExcludes.size();
            for (int i = 0; i < numTypes; ++i) {
                if (mTargetTypeChildExcludes.get(i).isInstance(view)) {
                    return;
                }
            }
        }
        ViewGroup parent = (ViewGroup) view;
        for (int i = 0; i < parent.getChildCount(); ++i) {
            captureHierarchy(parent.getChildAt(i), start);
        }
    }
}

---

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