Java Code Examples for android.support.v7.widget.LinearSmoothScroller#setTargetPosition()
The following examples show how to use
android.support.v7.widget.LinearSmoothScroller#setTargetPosition() .
You can vote up the ones you like or vote down the ones you don't like,
and go to the original project or source file by following the links above each example. You may check out the related API usage on the sidebar.
Example 1
| Source File: SnappyLinearLayoutManager.java From Ouroboros with GNU General Public License v3.0 | 6 votes |
|
@Override
public void smoothScrollToPosition(RecyclerView recyclerView, RecyclerView.State state, int position) {
final LinearSmoothScroller linearSmoothScroller =
new LinearSmoothScroller(recyclerView.getContext()) {
// I want a behavior where the scrolling always snaps to the beginning of
// the list. Snapping to end is also trivial given the default implementation.
// If you need a different behavior, you may need to override more
// of the LinearSmoothScrolling methods.
protected int getHorizontalSnapPreference() {
return SNAP_TO_START;
}
protected int getVerticalSnapPreference() {
return SNAP_TO_START;
}
@Override
public PointF computeScrollVectorForPosition(int targetPosition) {
return SnappyLinearLayoutManager.this
.computeScrollVectorForPosition(targetPosition);
}
};
linearSmoothScroller.setTargetPosition(position);
startSmoothScroll(linearSmoothScroller);
}
Example 2
| Source File: ActivityWithRecycler.java From xDrip-plus with GNU General Public License v3.0 | 6 votes |
|
@Override
public void smoothScrollToPosition(RecyclerView recyclerView, RecyclerView.State state, int position) {
final LinearSmoothScroller linearSmoothScroller = new LinearSmoothScroller(recyclerView.getContext()) {
@Override
public PointF computeScrollVectorForPosition(int targetPosition) {
return CustomLinearLayoutManager.this.computeScrollVectorForPosition(targetPosition);
}
@Override
protected float calculateSpeedPerPixel(DisplayMetrics displayMetrics) {
return MILLISECONDS_PER_INCH / displayMetrics.densityDpi;
}
};
linearSmoothScroller.setTargetPosition(position);
try {
startSmoothScroll(linearSmoothScroller);
} catch (IllegalArgumentException e) {
// couldn't scroll for some reason, just ignore
}
}
Example 3
| Source File: StickyHeaderGridLayoutManager.java From Sticky-Header-Grid with MIT License | 6 votes |
|
@Override
public void smoothScrollToPosition(final RecyclerView recyclerView, RecyclerView.State state, int position) {
final LinearSmoothScroller linearSmoothScroller = new LinearSmoothScroller(recyclerView.getContext()) {
@Override
public int calculateDyToMakeVisible(View view, int snapPreference) {
final RecyclerView.LayoutManager layoutManager = getLayoutManager();
if (layoutManager == null || !layoutManager.canScrollVertically()) {
return 0;
}
final int adapterPosition = getPosition(view);
final int topOffset = getPositionSectionHeaderHeight(adapterPosition);
final int top = layoutManager.getDecoratedTop(view);
final int bottom = layoutManager.getDecoratedBottom(view);
final int start = layoutManager.getPaddingTop() + topOffset;
final int end = layoutManager.getHeight() - layoutManager.getPaddingBottom();
return calculateDtToFit(top, bottom, start, end, snapPreference);
}
};
linearSmoothScroller.setTargetPosition(position);
startSmoothScroll(linearSmoothScroller);
}
Example 4
| Source File: GridLayoutManager.java From TvRecyclerView with Apache License 2.0 | 6 votes |
|
private int startPositionSmoothScroller(int position) {
LinearSmoothScroller linearSmoothScroller = new GridLinearSmoothScroller() {
@Override
public PointF computeScrollVectorForPosition(int targetPosition) {
if (getChildCount() == 0) {
return null;
}
final int firstChildPos = getPosition(getChildAt(0));
final boolean isStart = targetPosition < firstChildPos;
final int direction = isStart ? -1 : 1;
if (mOrientation == HORIZONTAL) {
return new PointF(direction, 0);
} else {
return new PointF(0, direction);
}
}
@Override
protected void onStop() {
super.onStop();
}
};
linearSmoothScroller.setTargetPosition(position);
startSmoothScroll(linearSmoothScroller);
return linearSmoothScroller.getTargetPosition();
}
Example 5
| Source File: SpeedyLinearLayoutManager.java From diycode with Apache License 2.0 | 6 votes |
|
@Override
public void smoothScrollToPosition(RecyclerView recyclerView, RecyclerView.State state, int
position) {
final LinearSmoothScroller linearSmoothScroller = new LinearSmoothScroller(recyclerView
.getContext()) {
@Override
public PointF computeScrollVectorForPosition(int targetPosition) {
return SpeedyLinearLayoutManager.this.computeScrollVectorForPosition
(targetPosition);
}
@Override
protected float calculateSpeedPerPixel(DisplayMetrics displayMetrics) {
return MILLISECONDS_PER_INCH / displayMetrics.densityDpi;
}
};
linearSmoothScroller.setTargetPosition(position);
startSmoothScroll(linearSmoothScroller);
}
Example 6
| Source File: PreCachingLayoutManager.java From iGap-Android with GNU Affero General Public License v3.0 | 6 votes |
|
@Override
public void smoothScrollToPosition(RecyclerView recyclerView, RecyclerView.State state, int position) {
final LinearSmoothScroller linearSmoothScroller = new LinearSmoothScroller(recyclerView.getContext()) {
@Override
public PointF computeScrollVectorForPosition(int targetPosition) {
return PreCachingLayoutManager.this.computeScrollVectorForPosition(targetPosition);
}
@Override
protected float calculateSpeedPerPixel(DisplayMetrics displayMetrics) {
return MILLISECONDS_PER_INCH / displayMetrics.densityDpi;
}
};
linearSmoothScroller.setTargetPosition(position);
startSmoothScroll(linearSmoothScroller);
}
Example 7
| Source File: StaticGridLayoutManager.java From UltimateAndroid with Apache License 2.0 | 5 votes |
|
@Override
public void smoothScrollToPosition(RecyclerView recyclerView, RecyclerView.State state, final int position) {
if (position >= getItemCount()) {
Log.e(TAG, "Cannot scroll to "+position+", item count is "+getItemCount());
return;
}
/*
* LinearSmoothScroller's default behavior is to scroll the contents until
* the child is fully visible. It will snap to the top-left or bottom-right
* of the parent depending on whether the direction of travel was positive
* or negative.
*/
LinearSmoothScroller scroller = new LinearSmoothScroller(recyclerView.getContext()) {
/*
* LinearSmoothScroller, at a minimum, just need to know the vector
* (x/y distance) to travel in order to get from the current positioning
* to the target.
*/
@Override
public PointF computeScrollVectorForPosition(int targetPosition) {
final int rowOffset = getGlobalRowOfPosition(targetPosition)
- getGlobalRowOfPosition(mFirstVisiblePosition);
final int columnOffset = getGlobalColumnOfPosition(targetPosition)
- getGlobalColumnOfPosition(mFirstVisiblePosition);
return new PointF(columnOffset * mDecoratedChildWidth, rowOffset * mDecoratedChildHeight);
}
};
scroller.setTargetPosition(position);
startSmoothScroll(scroller);
}
Example 8
| Source File: TwoWayLayoutManager.java From UltimateAndroid with Apache License 2.0 | 5 votes |
|
@Override
public void smoothScrollToPosition(RecyclerView recyclerView, State state, int position) {
final LinearSmoothScroller scroller = new LinearSmoothScroller(recyclerView.getContext()) {
@Override
public PointF computeScrollVectorForPosition(int targetPosition) {
if (getChildCount() == 0) {
return null;
}
final int direction = targetPosition < getFirstVisiblePosition() ? -1 : 1;
if (mIsVertical) {
return new PointF(0, direction);
} else {
return new PointF(direction, 0);
}
}
@Override
protected int getVerticalSnapPreference() {
return LinearSmoothScroller.SNAP_TO_START;
}
@Override
protected int getHorizontalSnapPreference() {
return LinearSmoothScroller.SNAP_TO_START;
}
};
scroller.setTargetPosition(position);
startSmoothScroll(scroller);
}
Example 9
| Source File: ScrollableLinearLayoutManager.java From nono-android with GNU General Public License v3.0 | 5 votes |
|
@Override
public void smoothScrollToPosition(RecyclerView recyclerView, RecyclerView.State state, int position) {
LinearSmoothScroller scroller = new LinearSmoothScroller(_context) {
@Override
public PointF computeScrollVectorForPosition(int targetPosition) {
return ScrollableLinearLayoutManager.this.computeScrollVectorForPosition(targetPosition);
}
};
scroller.setTargetPosition(position);
startSmoothScroll(scroller);
}
Example 10
| Source File: SpannedGridLayoutManager.java From AvatarTinderView with Apache License 2.0 | 5 votes |
|
@Override
public void smoothScrollToPosition(
RecyclerView recyclerView, RecyclerView.State state, int position) {
if (position >= getItemCount()) position = getItemCount() - 1;
LinearSmoothScroller scroller = new LinearSmoothScroller(recyclerView.getContext()) {
@Override
public PointF computeScrollVectorForPosition(int targetPosition) {
final int rowOffset = getRowIndex(targetPosition) - firstVisibleRow;
return new PointF(0, rowOffset * cellHeight);
}
};
scroller.setTargetPosition(position);
startSmoothScroll(scroller);
}
Example 11
| Source File: HeaderLayoutManagerFixed.java From android-parallax-recyclerview with Apache License 2.0 | 5 votes |
|
@Override
public void smoothScrollToPosition(RecyclerView recyclerView, RecyclerView.State state,
int position) {
LinearSmoothScroller linearSmoothScroller =
new LinearSmoothScroller(recyclerView.getContext()) {
@Override
public PointF computeScrollVectorForPosition(int targetPosition) {
return HeaderLayoutManagerFixed.this
.computeScrollVectorForPosition(targetPosition);
}
};
linearSmoothScroller.setTargetPosition(position);
startSmoothScroll(linearSmoothScroller);
}
Example 12
| Source File: HorizontalLayoutManager.java From Horizontal-Calendar with Apache License 2.0 | 5 votes |
|
@Override
public void smoothScrollToPosition(RecyclerView recyclerView, RecyclerView.State state, int position) {
LinearSmoothScroller smoothScroller = new LinearSmoothScroller(recyclerView.getContext()) {
@Override
protected float calculateSpeedPerPixel(DisplayMetrics displayMetrics) {
return smoothScrollSpeed / displayMetrics.densityDpi;
}
};
smoothScroller.setTargetPosition(position);
startSmoothScroll(smoothScroller);
}
Example 13
| Source File: FixedGridLayoutManager.java From recyclerview-playground with MIT License | 5 votes |
|
@Override
public void smoothScrollToPosition(RecyclerView recyclerView, RecyclerView.State state, final int position) {
if (position >= getItemCount()) {
Log.e(TAG, "Cannot scroll to "+position+", item count is "+getItemCount());
return;
}
/*
* LinearSmoothScroller's default behavior is to scroll the contents until
* the child is fully visible. It will snap to the top-left or bottom-right
* of the parent depending on whether the direction of travel was positive
* or negative.
*/
LinearSmoothScroller scroller = new LinearSmoothScroller(recyclerView.getContext()) {
/*
* LinearSmoothScroller, at a minimum, just need to know the vector
* (x/y distance) to travel in order to get from the current positioning
* to the target.
*/
@Override
public PointF computeScrollVectorForPosition(int targetPosition) {
final int rowOffset = getGlobalRowOfPosition(targetPosition)
- getGlobalRowOfPosition(mFirstVisiblePosition);
final int columnOffset = getGlobalColumnOfPosition(targetPosition)
- getGlobalColumnOfPosition(mFirstVisiblePosition);
return new PointF(columnOffset * mDecoratedChildWidth, rowOffset * mDecoratedChildHeight);
}
};
scroller.setTargetPosition(position);
startSmoothScroll(scroller);
}
Example 14
| Source File: StaticGridLayoutManager.java From UltimateAndroid with Apache License 2.0 | 5 votes |
|
@Override
public void smoothScrollToPosition(RecyclerView recyclerView, RecyclerView.State state, final int position) {
if (position >= getItemCount()) {
Log.e(TAG, "Cannot scroll to "+position+", item count is "+getItemCount());
return;
}
/*
* LinearSmoothScroller's default behavior is to scroll the contents until
* the child is fully visible. It will snap to the top-left or bottom-right
* of the parent depending on whether the direction of travel was positive
* or negative.
*/
LinearSmoothScroller scroller = new LinearSmoothScroller(recyclerView.getContext()) {
/*
* LinearSmoothScroller, at a minimum, just need to know the vector
* (x/y distance) to travel in order to get from the current positioning
* to the target.
*/
@Override
public PointF computeScrollVectorForPosition(int targetPosition) {
final int rowOffset = getGlobalRowOfPosition(targetPosition)
- getGlobalRowOfPosition(mFirstVisiblePosition);
final int columnOffset = getGlobalColumnOfPosition(targetPosition)
- getGlobalColumnOfPosition(mFirstVisiblePosition);
return new PointF(columnOffset * mDecoratedChildWidth, rowOffset * mDecoratedChildHeight);
}
};
scroller.setTargetPosition(position);
startSmoothScroll(scroller);
}
Example 15
| Source File: OverFlyingLayoutManager.java From RecyclerBanner with Apache License 2.0 | 4 votes |
|
@Override
public void smoothScrollToPosition(RecyclerView recyclerView, RecyclerView.State state, int position) {
LinearSmoothScroller linearSmoothScroller = new LinearSmoothScroller(recyclerView.getContext());
linearSmoothScroller.setTargetPosition(position);
startSmoothScroll(linearSmoothScroller);
}
Example 16
| Source File: RecyclerViewPager.java From oneHookLibraryAndroid with Apache License 2.0 | 4 votes |
|
@Override
public void smoothScrollToPosition(int position) {
if (position >= getAdapter().getItemCount() || position < 0) {
return;
}
mSmoothScrollTargetPosition = position;
if (getLayoutManager() != null && getLayoutManager() instanceof LinearLayoutManager) {
/*
* exclude item decoration
*/
final LinearSmoothScroller linearSmoothScroller =
new LinearSmoothScroller(getContext()) {
@Override
public PointF computeScrollVectorForPosition(int targetPosition) {
if (getLayoutManager() == null) {
return null;
}
return ((LinearLayoutManager) getLayoutManager())
.computeScrollVectorForPosition(targetPosition);
}
@Override
protected void onTargetFound(View targetView, RecyclerView.State state, Action action) {
if (getLayoutManager() == null) {
return;
}
final int dx;
final int dy;
if (getLayoutManager().canScrollHorizontally()) {
/* horizontal */
dx = 0;
dy = 0;
} else {
dx = 0;
int targetTop = getLayoutManager().getDecoratedTop(targetView);
final int targetBottom = getLayoutManager().getDecoratedBottom(targetView);
final int targetHeight = targetBottom - targetTop;
// System.out.println("Target top : " + targetTop + " Target bottom : " + targetBottom + " , height " + targetHeight);
if (targetTop < 0 && Math.abs(targetTop) / 2 > targetHeight / 2) {
while (targetTop < 0) {
targetTop += targetHeight;
}
}
if (targetTop > 0) {
while (targetTop > targetHeight) {
targetTop -= targetHeight;
}
}
dy = -targetTop;
}
final int distance = (int) Math.sqrt(dx * dx + dy * dy);
final int time = calculateTimeForDeceleration(distance);
if (time > 0) {
action.update(-dx, -dy, time, mDecelerateInterpolator);
}
}
};
linearSmoothScroller.setTargetPosition(position);
getLayoutManager().startSmoothScroll(linearSmoothScroller);
} else {
super.smoothScrollToPosition(position);
}
}
Example 17
| Source File: PagerRecyclerView.java From DragBoardView with Apache License 2.0 | 4 votes |
|
@Override
public void smoothScrollToPosition(int position) {
mSmoothScrollTargetPosition = position;
if (getLayoutManager() != null && getLayoutManager() instanceof LinearLayoutManager) {
LinearSmoothScroller linearSmoothScroller = new LinearSmoothScroller(getContext()) {
@Override
public PointF computeScrollVectorForPosition(int targetPosition) {
if (getLayoutManager() == null) {return null;}
return ((LinearLayoutManager) getLayoutManager()).computeScrollVectorForPosition(targetPosition);
}
@Override
protected void onTargetFound(View targetView, State state, Action action) {
if (getLayoutManager() == null) {return;}
int dx = calculateDxToMakeVisible(targetView, getHorizontalSnapPreference());
int dy = calculateDyToMakeVisible(targetView, getVerticalSnapPreference());
if (dx > 0) {
dx = dx - getLayoutManager().getLeftDecorationWidth(targetView);
} else {
dx = dx + getLayoutManager().getRightDecorationWidth(targetView);
}
if (dy > 0) {
dy = dy - getLayoutManager()
.getTopDecorationHeight(targetView);
} else {
dy = dy + getLayoutManager()
.getBottomDecorationHeight(targetView);
}
final int distance = (int) Math.sqrt(dx * dx + dy * dy);
final int time = calculateTimeForDeceleration(distance);
if (time > 0) {
action.update(-dx, -dy, time, mDecelerateInterpolator);
}
}
};
linearSmoothScroller.setTargetPosition(position);
if (position == RecyclerView.NO_POSITION) {
return;
}
getLayoutManager().startSmoothScroll(linearSmoothScroller);
} else {
super.smoothScrollToPosition(position);
}
}
Example 18
| Source File: DiscreteScrollLayoutManager.java From XPlayer2 with Apache License 2.0 | 4 votes |
|
private void startSmoothPendingScroll() {
LinearSmoothScroller scroller = new DiscreteLinearSmoothScroller(context);
scroller.setTargetPosition(currentPosition);
recyclerViewProxy.startSmoothScroll(scroller);
}
Example 19
| Source File: PagerRecyclerView.java From timecat with Apache License 2.0 | 4 votes |
|
@Override
public void smoothScrollToPosition(int position) {
mSmoothScrollTargetPosition = position;
if (getLayoutManager() != null && getLayoutManager() instanceof LinearLayoutManager) {
LinearSmoothScroller linearSmoothScroller = new LinearSmoothScroller(getContext()) {
@Override
public PointF computeScrollVectorForPosition(int targetPosition) {
if (getLayoutManager() == null)
return null;
return ((LinearLayoutManager) getLayoutManager()).computeScrollVectorForPosition(targetPosition);
}
@Override
protected void onTargetFound(View targetView, State state, Action action) {
if (getLayoutManager() == null)
return;
int dx = calculateDxToMakeVisible(targetView, getHorizontalSnapPreference());
int dy = calculateDyToMakeVisible(targetView, getVerticalSnapPreference());
if (dx > 0) {
dx = dx - getLayoutManager().getLeftDecorationWidth(targetView);
} else {
dx = dx + getLayoutManager().getRightDecorationWidth(targetView);
}
if (dy > 0) {
dy = dy - getLayoutManager()
.getTopDecorationHeight(targetView);
} else {
dy = dy + getLayoutManager()
.getBottomDecorationHeight(targetView);
}
final int distance = (int) Math.sqrt(dx * dx + dy * dy);
final int time = calculateTimeForDeceleration(distance);
if (time > 0) {
action.update(-dx, -dy, time, mDecelerateInterpolator);
}
}
};
linearSmoothScroller.setTargetPosition(position);
if (position == RecyclerView.NO_POSITION) {
return;
}
getLayoutManager().startSmoothScroll(linearSmoothScroller);
} else {
super.smoothScrollToPosition(position);
}
}
Example 20
| Source File: RecyclerViewPager.java From RecyclerViewPager with Apache License 2.0 | 4 votes |
|
@Override
public void smoothScrollToPosition(int position) {
if (DEBUG) {
Log.d("@", "smoothScrollToPosition:" + position);
}
if (mPositionBeforeScroll < 0) {
mPositionBeforeScroll = getCurrentPosition();
}
mSmoothScrollTargetPosition = position;
if (getLayoutManager() != null && getLayoutManager() instanceof LinearLayoutManager) {
// exclude item decoration
LinearSmoothScroller linearSmoothScroller =
new LinearSmoothScroller(getContext()) {
@Override
public PointF computeScrollVectorForPosition(int targetPosition) {
if (getLayoutManager() == null) {
return null;
}
return ((LinearLayoutManager) getLayoutManager())
.computeScrollVectorForPosition(targetPosition);
}
@Override
protected void onTargetFound(View targetView, RecyclerView.State state, Action action) {
if (getLayoutManager() == null) {
return;
}
int dx = calculateDxToMakeVisible(targetView,
getHorizontalSnapPreference());
int dy = calculateDyToMakeVisible(targetView,
getVerticalSnapPreference());
if (dx > 0) {
dx = dx - getLayoutManager()
.getLeftDecorationWidth(targetView);
} else {
dx = dx + getLayoutManager()
.getRightDecorationWidth(targetView);
}
if (dy > 0) {
dy = dy - getLayoutManager()
.getTopDecorationHeight(targetView);
} else {
dy = dy + getLayoutManager()
.getBottomDecorationHeight(targetView);
}
final int distance = (int) Math.sqrt(dx * dx + dy * dy);
final int time = calculateTimeForDeceleration(distance);
if (time > 0) {
action.update(-dx, -dy, time, mDecelerateInterpolator);
}
}
@Override
protected float calculateSpeedPerPixel(DisplayMetrics displayMetrics) {
return mMillisecondsPerInch / displayMetrics.densityDpi;
}
@Override
protected void onStop() {
super.onStop();
if (mOnPageChangedListeners != null) {
for (OnPageChangedListener onPageChangedListener : mOnPageChangedListeners) {
if (onPageChangedListener != null) {
onPageChangedListener.OnPageChanged(mPositionBeforeScroll, mSmoothScrollTargetPosition);
}
}
}
mHasCalledOnPageChanged = true;
}
};
linearSmoothScroller.setTargetPosition(position);
if (position == RecyclerView.NO_POSITION) {
return;
}
getLayoutManager().startSmoothScroll(linearSmoothScroller);
} else {
super.smoothScrollToPosition(position);
}
}
