下面列出了android.view.ViewConfiguration#getScaledMaximumFlingVelocity ( ) 实例代码，或者点击链接到github查看源代码，也可以在右侧发表评论。
/**
* Initializes various states for this workspace.
*/
protected void init() {
mDirtyPageContent = new ArrayList<Boolean>();
mDirtyPageContent.ensureCapacity(32);
mScroller = new LauncherScroller(getContext());
setDefaultInterpolator(new ScrollInterpolator());
mCurrentPage = 0;
mCenterPagesVertically = true;
final ViewConfiguration configuration = ViewConfiguration.get(getContext());
mTouchSlop = configuration.getScaledPagingTouchSlop();
mPagingTouchSlop = configuration.getScaledPagingTouchSlop();
mMaximumVelocity = configuration.getScaledMaximumFlingVelocity();
mDensity = getResources().getDisplayMetrics().density;
// Scale the fling-to-delete threshold by the density
mFlingToDeleteThresholdVelocity =
(int) (mFlingToDeleteThresholdVelocity * mDensity);
mFlingThresholdVelocity = (int) (FLING_THRESHOLD_VELOCITY * mDensity);
mMinFlingVelocity = (int) (MIN_FLING_VELOCITY * mDensity);
mMinSnapVelocity = (int) (MIN_SNAP_VELOCITY * mDensity);
setOnHierarchyChangeListener(this);
}
/**
* Apps should use ViewDragHelper.create() to get a new instance.
* This will allow VDH to use internal compatibility implementations for different
* platform versions.
* If the interpolator is null, the default interpolator will be used.
*
* @param context Context to initialize config-dependent params from
* @param forParent Parent view to monitor
* @param interpolator interpolator for scroller
*/
private ViewDragHelper(@NonNull Context context, @Nullable ViewGroup forParent, @Nullable Interpolator interpolator, @Nullable Callback cb) {
if (forParent == null) {
throw new IllegalArgumentException("Parent view may not be null");
}
if (cb == null) {
throw new IllegalArgumentException("Callback may not be null");
}
mParentView = forParent;
mCallback = cb;
final ViewConfiguration vc = ViewConfiguration.get(context);
final float density = context.getResources().getDisplayMetrics().density;
mEdgeSize = (int) (EDGE_SIZE * density + 0.5f);
mTouchSlop = vc.getScaledTouchSlop();
mMaxVelocity = vc.getScaledMaximumFlingVelocity();
mMinVelocity = vc.getScaledMinimumFlingVelocity();
mScroller = ScrollerCompat.create(context, interpolator != null ? interpolator : sInterpolator);
}
/**
* initialize method, called inside the Chart.init() method.
*
* @param res
*/
@SuppressWarnings("deprecation")
public static void init(Context context) {
if (context == null) {
// noinspection deprecation
mMinimumFlingVelocity = ViewConfiguration.getMinimumFlingVelocity();
// noinspection deprecation
mMaximumFlingVelocity = ViewConfiguration.getMaximumFlingVelocity();
Log.e("MPAndroidChart, Utils.init(...)", "PROVIDED CONTEXT OBJECT IS NULL");
} else {
ViewConfiguration viewConfiguration = ViewConfiguration.get(context);
mMinimumFlingVelocity = viewConfiguration.getScaledMinimumFlingVelocity();
mMaximumFlingVelocity = viewConfiguration.getScaledMaximumFlingVelocity();
Resources res = context.getResources();
mMetrics = res.getDisplayMetrics();
}
}
/**
* Apps should use ViewDragHelper.create() to get a new instance. This will
* allow VDH to use internal compatibility implementations for different
* platform versions.
*
* @param context
* Context to initialize config-dependent params from
* @param forParent
* Parent view to monitor
*/
private ViewDragHelper(Context context, ViewGroup forParent, Callback cb) {
if (forParent == null) {
throw new IllegalArgumentException("Parent view may not be null");
}
if (cb == null) {
throw new IllegalArgumentException("Callback may not be null");
}
mParentView = forParent;
mCallback = cb;
final ViewConfiguration vc = ViewConfiguration.get(context);
final float density = context.getResources().getDisplayMetrics().density;
mEdgeSize = (int) (EDGE_SIZE * density + 0.5f);
mTouchSlop = vc.getScaledTouchSlop();
mMaxVelocity = vc.getScaledMaximumFlingVelocity();
mMinVelocity = vc.getScaledMinimumFlingVelocity();
mScroller = ScrollerCompat.create(context, sInterpolator);
}
public ViewPagerBottomSheetBehavior(Context context, AttributeSet attrs) {
super(context, attrs);
TypedArray a = context.obtainStyledAttributes(attrs,
R.styleable.BottomSheetBehavior_Layout);
TypedValue value = a.peekValue(R.styleable.BottomSheetBehavior_Layout_behavior_peekHeight);
if (value != null && value.data == PEEK_HEIGHT_AUTO) {
setPeekHeight(value.data);
} else {
setPeekHeight(a.getDimensionPixelSize(
R.styleable.BottomSheetBehavior_Layout_behavior_peekHeight, PEEK_HEIGHT_AUTO));
}
setHideable(a.getBoolean(R.styleable.BottomSheetBehavior_Layout_behavior_hideable, false));
setSkipCollapsed(a.getBoolean(R.styleable.BottomSheetBehavior_Layout_behavior_skipCollapsed,
false));
a.recycle();
ViewConfiguration configuration = ViewConfiguration.get(context);
mMaximumVelocity = configuration.getScaledMaximumFlingVelocity();
}
/**
* Apps should use ViewDragHelper.create() to get a new instance.
* This will allow VDH to use internal compatibility implementations for different
* platform versions.
*
* @param context Context to initialize config-dependent params from
* @param forParent Parent view to monitor
*/
private SlideViewDragHelper(Context context, ViewGroup forParent, SlideViewDragHelper.Callback cb) {
if (forParent == null) {
throw new IllegalArgumentException("Parent view may not be null");
}
if (cb == null) {
throw new IllegalArgumentException("Callback may not be null");
}
mParentView = forParent;
mCallback = cb;
final ViewConfiguration vc = ViewConfiguration.get(context);
final float density = context.getResources().getDisplayMetrics().density;
mEdgeSize = (int) (EDGE_SIZE * density + 0.5f);
mTouchSlop = vc.getScaledTouchSlop();
mMaxVelocity = vc.getScaledMaximumFlingVelocity();
mMinVelocity = vc.getScaledMinimumFlingVelocity();
mScroller = ScrollerCompat.create(context, sInterpolator);
}
/**
* Apps should use ViewDragHelper.create() to get a new instance. This will
* allow VDH to use internal compatibility implementations for different
* platform versions.
*
* @param context Context to initialize config-dependent params from
* @param forParent Parent view to monitor
*/
private ViewDragHelper(Context context, ViewGroup forParent, Callback cb) {
if (forParent == null) {
throw new IllegalArgumentException("Parent view may not be null");
}
if (cb == null) {
throw new IllegalArgumentException("Callback may not be null");
}
mParentView = forParent;
mCallback = cb;
final ViewConfiguration vc = ViewConfiguration.get(context);
final float density = context.getResources().getDisplayMetrics().density;
mEdgeSize = (int) (EDGE_SIZE * density + 0.5f);
mTouchSlop = vc.getScaledTouchSlop();
mMaxVelocity = vc.getScaledMaximumFlingVelocity();
mMinVelocity = vc.getScaledMinimumFlingVelocity();
mScroller = ScrollerCompat.create(context, sInterpolator);
}
void initViewPager()
{
setWillNotDraw( false );
setDescendantFocusability( FOCUS_AFTER_DESCENDANTS );
setFocusable( true );
final Context context = getContext();
mScroller = new Scroller( context, sInterpolator );
final ViewConfiguration configuration = ViewConfiguration.get( context );
final float density = context.getResources().getDisplayMetrics().density;
mTouchSlop = configuration.getScaledPagingTouchSlop();
mMinimumVelocity = (int) ( MIN_FLING_VELOCITY * density );
mMaximumVelocity = configuration.getScaledMaximumFlingVelocity();
mLeftEdge = new EdgeEffect( context );
mRightEdge = new EdgeEffect( context );
mFlingDistance = (int) ( MIN_DISTANCE_FOR_FLING * density );
mCloseEnough = (int) ( CLOSE_ENOUGH * density );
mDefaultGutterSize = (int) ( DEFAULT_GUTTER_SIZE * density );
setAccessibilityDelegate( new MyAccessibilityDelegate() );
if ( this.getImportantForAccessibility()
== View.IMPORTANT_FOR_ACCESSIBILITY_AUTO )
{
setImportantForAccessibility( View.IMPORTANT_FOR_ACCESSIBILITY_YES );
}
}
void initViewPager() {
setWillNotDraw(false);
setDescendantFocusability(FOCUS_AFTER_DESCENDANTS);
setFocusable(true);
final Context context = getContext();
mScroller = new VelocityScroller(context, sInterpolator);
final ViewConfiguration configuration = ViewConfiguration.get(context);
final float density = context.getResources().getDisplayMetrics().density;
mTouchSlop = ViewConfigurationCompat.getScaledPagingTouchSlop(configuration);
mMinimumVelocity = (int) (MIN_FLING_VELOCITY * density);
mMaximumVelocity = configuration.getScaledMaximumFlingVelocity();
mLeftEdge = new EdgeEffectCompat(context);
mRightEdge = new EdgeEffectCompat(context);
mFlingDistance = (int) (MIN_DISTANCE_FOR_FLING * density);
mCloseEnough = (int) (CLOSE_ENOUGH * density);
mDefaultGutterSize = (int) (DEFAULT_GUTTER_SIZE * density);
ViewCompat.setAccessibilityDelegate(this, new MyAccessibilityDelegate());
if (ViewCompat.getImportantForAccessibility(this)
== ViewCompat.IMPORTANT_FOR_ACCESSIBILITY_AUTO) {
ViewCompat.setImportantForAccessibility(this,
ViewCompat.IMPORTANT_FOR_ACCESSIBILITY_YES);
}
}
private void initDraggableGridViewPager() {
setWillNotDraw(false);
setDescendantFocusability(FOCUS_AFTER_DESCENDANTS);
setFocusable(true);
setChildrenDrawingOrderEnabled(true);
final Context context = getContext();
final ViewConfiguration configuration = ViewConfiguration.get(context);
final float density = context.getResources().getDisplayMetrics().density;
mGridGap = (int) (DEFAULT_GRID_GAP * density);
// internal paddings
mPaddingLeft = getPaddingLeft();
mPaddingTop = getPaddingTop();
mPaddingRight = getPaddingRight();
mPaddingButtom = getPaddingBottom();
super.setPadding(0, 0, 0, 0);
mScroller = new Scroller(context, sInterpolator);
mTouchSlop = ViewConfigurationCompat.getScaledPagingTouchSlop(configuration);
mMinimumVelocity = (int) (MIN_FLING_VELOCITY * density);
mMaximumVelocity = configuration.getScaledMaximumFlingVelocity();
mFlingDistance = (int) (MIN_DISTANCE_FOR_FLING * density);
mCloseEnough = (int) (CLOSE_ENOUGH * density);
}
private void initScrollView() {
mScroller = new Scroller(getContext());
setFocusable(true);
setDescendantFocusability(FOCUS_AFTER_DESCENDANTS);
setWillNotDraw(false);
final ViewConfiguration configuration = ViewConfiguration
.get(getContext());
mTouchSlop = configuration.getScaledTouchSlop();
mMinimumVelocity = configuration.getScaledMinimumFlingVelocity();
mMaximumVelocity = configuration.getScaledMaximumFlingVelocity();
}
void initViewPager() {
setWillNotDraw(false);
setDescendantFocusability(FOCUS_AFTER_DESCENDANTS);
setFocusable(true);
final Context context = getContext();
mScroller = new Scroller(context, sInterpolator);
final ViewConfiguration configuration = ViewConfiguration.get(context);
final float density = context.getResources().getDisplayMetrics().density;
mTouchSlop = ViewConfigurationCompat.getScaledPagingTouchSlop(configuration);
mMinimumVelocity = (int) (MIN_FLING_VELOCITY * density);
mMaximumVelocity = configuration.getScaledMaximumFlingVelocity();
mLeftEdge = new EdgeEffectCompat(context);
mRightEdge = new EdgeEffectCompat(context);
mFlingDistance = (int) (MIN_DISTANCE_FOR_FLING * density);
mCloseEnough = (int) (CLOSE_ENOUGH * density);
mDefaultGutterSize = (int) (DEFAULT_GUTTER_SIZE * density);
ViewCompat.setAccessibilityDelegate(this, new MyAccessibilityDelegate());
if (ViewCompat.getImportantForAccessibility(this)
== ViewCompat.IMPORTANT_FOR_ACCESSIBILITY_AUTO) {
ViewCompat.setImportantForAccessibility(this,
ViewCompat.IMPORTANT_FOR_ACCESSIBILITY_YES);
}
}
private void initScrollView() {
mScroller = new OverScroller(getContext());
setFocusable(true);
setDescendantFocusability(FOCUS_AFTER_DESCENDANTS);
setWillNotDraw(false);
final ViewConfiguration configuration = ViewConfiguration.get(mContext);
mTouchSlop = configuration.getScaledTouchSlop();
mMinimumVelocity = configuration.getScaledMinimumFlingVelocity();
mMaximumVelocity = configuration.getScaledMaximumFlingVelocity();
mOverscrollDistance = configuration.getScaledOverscrollDistance();
mOverflingDistance = configuration.getScaledOverflingDistance();
mHorizontalScrollFactor = configuration.getScaledHorizontalScrollFactor();
}
private void initScrollView() {
mScroller = new Scroller(getContext());
setFocusable(true);
setDescendantFocusability(FOCUS_AFTER_DESCENDANTS);
setWillNotDraw(false);
final ViewConfiguration configuration = ViewConfiguration
.get(getContext());
mTouchSlop = configuration.getScaledTouchSlop();
mMinimumVelocity = configuration.getScaledMinimumFlingVelocity();
mMaximumVelocity = configuration.getScaledMaximumFlingVelocity();
}
public void initAttr(Context context, @Nullable AttributeSet attrs, int defStyleAttr) {
mOverScroller = new OverScroller(context);
final ViewConfiguration viewConfiguration = ViewConfiguration.get(context);
mMinimumVelocity = viewConfiguration.getScaledMinimumFlingVelocity();
mMaximumVelocity = viewConfiguration.getScaledMaximumFlingVelocity();
scaledTouchSlop = viewConfiguration.getScaledTouchSlop();
TypedArray a = context.obtainStyledAttributes(attrs, R.styleable.WheelView, defStyleAttr, 0);
float defaultTextSize = TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, 14, getResources().getDisplayMetrics());
textColor = a.getColor(R.styleable.WheelView_wheelTextColor, 0xFF333333);
textSize = a.getDimension(R.styleable.WheelView_wheelTextSize, defaultTextSize);
showCount = a.getInt(R.styleable.WheelView_wheelShowCount, 5);
totalOffsetX = a.getDimensionPixelSize(R.styleable.WheelView_wheelTotalOffsetX, 0);
itemVerticalSpace = a.getDimensionPixelSize(R.styleable.WheelView_wheelItemVerticalSpace, 32);
wheelRotationX = a.getFloat(R.styleable.WheelView_wheelRotationX, DEFAULT_ROTATION_X);
velocityUnits = a.getInteger(R.styleable.WheelView_wheelRotationX, DEFAULT_VELOCITY_UNITS);
if (velocityUnits < 0) {
velocityUnits = Math.abs(velocityUnits);
}
a.recycle();
initConfig();
if (isInEditMode()) {
IWheel[] items = new IWheel[50];
for (int i = 0; i < items.length; i++) {
items[i] = new WheelItem("菜单选项" + (i < 10 ? "0" + i : String.valueOf(i)));
}
setItems(items);
}
}
public SwipeTouchHelper(StackCardsView view) {
mSwipeView = view;
final Context context = view.getContext();
final ViewConfiguration configuration = ViewConfiguration.get(context);
mDragSlop = (int) (configuration.getScaledTouchSlop() / mSwipeView.getDragSensitivity());
mMaxVelocity = configuration.getScaledMaximumFlingVelocity();
mMinVelocity = configuration.getScaledMinimumFlingVelocity();
float density = context.getResources().getDisplayMetrics().density;
mMinFastDisappearVelocity = (int) (MIN_FLING_VELOCITY * density);
mSpringSystem = SpringSystem.create();
updateTouchChild();
}
/**
* Default constructor for inflating AnchorBottomSheetBehaviors from layout.
*
* @param context The {@link Context}.
* @param attrs The {@link AttributeSet}.
*/
public AnchorBottomSheetBehavior(Context context, AttributeSet attrs) {
super(context, attrs);
TypedArray a = context.obtainStyledAttributes(attrs,
android.support.design.R.styleable.BottomSheetBehavior_Layout);
TypedValue value = a.peekValue(android.support.design.R.styleable.BottomSheetBehavior_Layout_behavior_peekHeight);
if (value != null && value.data == PEEK_HEIGHT_AUTO) {
setPeekHeight(value.data);
} else {
setPeekHeight(a.getDimensionPixelSize(
android.support.design.R.styleable.BottomSheetBehavior_Layout_behavior_peekHeight, PEEK_HEIGHT_AUTO));
}
setHideable(a.getBoolean(android.support.design.R.styleable.BottomSheetBehavior_Layout_behavior_hideable, false));
setSkipCollapsed(a.getBoolean(android.support.design.R.styleable.BottomSheetBehavior_Layout_behavior_skipCollapsed,
false));
setSkipAnchored(a.getBoolean(R.styleable.AnchorBottomSheetBehavior_Layout_behavior_skipAnchored, false));
a.recycle();
a = context.obtainStyledAttributes(attrs, R.styleable.AnchorBottomSheetBehavior_Layout);
mAnchorOffset = (int) a.getDimension(R.styleable.AnchorBottomSheetBehavior_Layout_behavior_anchorOffset, 0);
//noinspection WrongConstant
mState = a.getInt(R.styleable.AnchorBottomSheetBehavior_Layout_behavior_defaultState, mState);
a.recycle();
ViewConfiguration configuration = ViewConfiguration.get(context);
mMaximumVelocity = configuration.getScaledMaximumFlingVelocity();
mMinimumVelocity = configuration.getScaledMinimumFlingVelocity();
}
private void initView() {
final Context cx = getContext();
// 设置滚动减速器，在fling中会用到
mScroller = new Scroller(cx, new DecelerateInterpolator(0.5f));
final ViewConfiguration configuration = ViewConfiguration.get(cx);
mTouchSlop = configuration.getScaledTouchSlop();
mMinimumVelocity = configuration.getScaledMinimumFlingVelocity();
mMaximumVelocity = configuration.getScaledMaximumFlingVelocity();
mHandler.post(ScrollRunnable);
}
public PileLayout(Context context, AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
TypedArray a = context.obtainStyledAttributes(attrs, R.styleable.pile);
interval = (int) a.getDimension(R.styleable.pile_interval, interval);
sizeRatio = a.getFloat(R.styleable.pile_sizeRatio, sizeRatio);
scaleStep = a.getFloat(R.styleable.pile_scaleStep, scaleStep);
displayCount = a.getFloat(R.styleable.pile_displayCount, displayCount);
a.recycle();
ViewConfiguration configuration = ViewConfiguration.get(getContext());
mTouchSlop = configuration.getScaledTouchSlop();
mMaximumVelocity = configuration.getScaledMaximumFlingVelocity();
onClickListener = v -> {
if (null != adapter) {
int position = Integer.parseInt(v.getTag().toString());
if (position >= 0 && position < adapter.getItemCount()) {
adapter.onItemClick(((FrameLayout) v).getChildAt(0), position);
}
}
};
getViewTreeObserver().addOnGlobalLayoutListener(() -> {
if (getHeight() > 0 && null != adapter && !hasSetAdapter) {
setAdapter(adapter);
}
});
}
private void init() {
lineWidth = DisplayUtil.dp2px(2);
int lineColor = Color.parseColor("#434343");
int nameTextColor = Color.parseColor("#CC202332");
int clickedNameTextColor = Color.parseColor("#CCFFFFFF");
nameTextSize = DisplayUtil.dp2px(15);
clickedNameTextSize = DisplayUtil.dp2px(20);
barChartInterval = DisplayUtil.dp2px(30);
int barChartValueTextColor = Color.parseColor("#CC202332");
clickedValueTextSize = DisplayUtil.dp2px(20);
valueTextSize = DisplayUtil.dp2px(12);
clickedValueTextSize = DisplayUtil.dp2px(17);
barChartWidth = DisplayUtil.dp2px(20);
chartPaddingTop = DisplayUtil.dp2px(10);
paddingStart = DisplayUtil.dp2px(15);
paddingEnd = DisplayUtil.dp2px(15);
distanceFormNameToLine = DisplayUtil.dp2px(15);
valueTobarChartDistance = DisplayUtil.dp2px(10);
linePaint = new Paint(Paint.ANTI_ALIAS_FLAG);
linePaint.setStyle(Paint.Style.FILL);
linePaint.setStrokeWidth(lineWidth);
linePaint.setColor(lineColor);
namePaint = new Paint(Paint.ANTI_ALIAS_FLAG);
namePaint.setTextSize(nameTextSize);
namePaint.setColor(nameTextColor);
nameFontMetrics = namePaint.getFontMetrics();
clickedNamePaint = new Paint(Paint.ANTI_ALIAS_FLAG);
clickedNamePaint.setColor(clickedNameTextColor);
clickedNamePaint.setTextSize(clickedNameTextSize);
valuePaint = new Paint(Paint.ANTI_ALIAS_FLAG);
valuePaint.setTextSize(valueTextSize);
valuePaint.setColor(barChartValueTextColor);
valueFontMetrics = valuePaint.getFontMetrics();
clickedValuePaint = new Paint(Paint.ANTI_ALIAS_FLAG);
clickedValuePaint.setColor(barChartValueTextColor);
clickedValuePaint.setTextSize(clickedValueTextSize);
barChartPaintRect = new Rect();
barChartPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
scroller = new Scroller(getContext(), new LinearInterpolator());
ViewConfiguration configuration = ViewConfiguration.get(getContext());
minimumVelocity = configuration.getScaledMinimumFlingVelocity();
maximumVelocity = configuration.getScaledMaximumFlingVelocity();
barChartColors = new SparseArray<int[]>();
}