Java Code Examples for android.view.ViewConfiguration#getScaledMaximumFlingVelocity()

/**
 * 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);
}
 

/**
 * 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);
}
 

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 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 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);

}
 

/**
 * 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();
}
 

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();
}
 

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);
    }
}
 

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 );
    }
}
 

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();
}
 

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 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();
}
 

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);
}
 

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 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[]>();
}