下面列出了android.view.MotionEvent#getMetaState ( ) 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。
@Override
public boolean onSingleTapUp(MotionEvent event) {
if (adapter != null && currentTouchLayer != null) {
int metaState = event.getMetaState();
boolean isShiftPressed = (metaState & KeyEvent.META_SHIFT_ON) != 0;
if (!currentTouchIsSecondaryButton
|| !(adapter.getCurrentLayer() instanceof SelectionGroup)
|| ((SelectionGroup) adapter.getCurrentLayer()).getLayers().size() < 2) {
Layer selection = LayerUtils.selectionFrom(
adapter.getCurrentLayer(), currentTouchLayer, isShiftPressed);
adapter.setCurrentLayer(selection);
}
if (currentTouchIsSecondaryButton) {
currentTouchView.showContextMenu(event.getX(), event.getY());
}
}
return true;
}
@Override
public boolean onGenericMotionEvent(TextView widget, Spannable text, MotionEvent event) {
if ((event.getSource() & InputDevice.SOURCE_CLASS_POINTER) != 0) {
switch (event.getAction()) {
case MotionEvent.ACTION_SCROLL: {
final float vscroll;
final float hscroll;
if ((event.getMetaState() & KeyEvent.META_SHIFT_ON) != 0) {
vscroll = 0;
hscroll = event.getAxisValue(MotionEvent.AXIS_VSCROLL);
} else {
vscroll = -event.getAxisValue(MotionEvent.AXIS_VSCROLL);
hscroll = event.getAxisValue(MotionEvent.AXIS_HSCROLL);
}
boolean handled = false;
if (hscroll < 0) {
handled |= scrollLeft(widget, text, (int)Math.ceil(-hscroll));
} else if (hscroll > 0) {
handled |= scrollRight(widget, text, (int)Math.ceil(hscroll));
}
if (vscroll < 0) {
handled |= scrollUp(widget, text, (int)Math.ceil(-vscroll));
} else if (vscroll > 0) {
handled |= scrollDown(widget, text, (int)Math.ceil(vscroll));
}
return handled;
}
}
}
return false;
}
@Override
public boolean onGenericMotionEvent(MotionEvent event) {
switch (event.getAction()) {
case MotionEvent.ACTION_SCROLL: {
if (!mIsBeingDragged) {
final float axisValue;
if (event.isFromSource(InputDevice.SOURCE_CLASS_POINTER)) {
if ((event.getMetaState() & KeyEvent.META_SHIFT_ON) != 0) {
axisValue = -event.getAxisValue(MotionEvent.AXIS_VSCROLL);
} else {
axisValue = event.getAxisValue(MotionEvent.AXIS_HSCROLL);
}
} else if (event.isFromSource(InputDevice.SOURCE_ROTARY_ENCODER)) {
axisValue = event.getAxisValue(MotionEvent.AXIS_SCROLL);
} else {
axisValue = 0;
}
final int delta = Math.round(axisValue * mHorizontalScrollFactor);
if (delta != 0) {
final int range = getScrollRange();
int oldScrollX = mScrollX;
int newScrollX = oldScrollX + delta;
if (newScrollX < 0) {
newScrollX = 0;
} else if (newScrollX > range) {
newScrollX = range;
}
if (newScrollX != oldScrollX) {
super.scrollTo(newScrollX, mScrollY);
return true;
}
}
}
}
}
return super.onGenericMotionEvent(event);
}
@Override
public boolean onGenericMotionEvent(TextView widget, Spannable text, MotionEvent event) {
if ((ApiWrapper.getSourceOfEvent(event) & InputDevice.SOURCE_CLASS_POINTER) != 0) {
switch (event.getAction()) {
case MotionEvent.ACTION_SCROLL: {
final float vscroll;
final float hscroll;
if ((event.getMetaState() & KeyEvent.META_SHIFT_ON) != 0) {
vscroll = 0;
hscroll = ApiWrapper.getAxisValue(event,MotionEvent.AXIS_VSCROLL);
} else {
vscroll = -ApiWrapper.getAxisValue(event,MotionEvent.AXIS_VSCROLL);
hscroll = ApiWrapper.getAxisValue(event,MotionEvent.AXIS_HSCROLL);
}
boolean handled = false;
if (hscroll < 0) {
handled |= scrollLeft(widget, text, (int)Math.ceil(-hscroll));
} else if (hscroll > 0) {
handled |= scrollRight(widget, text, (int)Math.ceil(hscroll));
}
if (vscroll < 0) {
handled |= scrollUp(widget, text, (int)Math.ceil(-vscroll));
if ( handled ){
widget.moveCursorToVisibleOffset();
}
} else if (vscroll > 0) {
handled |= scrollDown(widget, text, (int)Math.ceil(vscroll));
if ( handled ){
widget.moveCursorToVisibleOffset();
}
}
return handled;
}
}
}
return false;
}
@Override
public boolean onGenericMotionEvent(MotionEvent event) {
if ((event.getSource() & InputDevice.SOURCE_CLASS_POINTER) != 0) {
switch (event.getAction()) {
case MotionEvent.ACTION_SCROLL: {
// Handle mouse (or ext. device) by shifting the page depending on the scroll
final float vscroll;
final float hscroll;
if ((event.getMetaState() & KeyEvent.META_SHIFT_ON) != 0) {
vscroll = 0;
hscroll = event.getAxisValue(MotionEvent.AXIS_VSCROLL);
} else {
vscroll = -event.getAxisValue(MotionEvent.AXIS_VSCROLL);
hscroll = event.getAxisValue(MotionEvent.AXIS_HSCROLL);
}
if (hscroll != 0 || vscroll != 0) {
boolean isForwardScroll = mIsRtl ? (hscroll < 0 || vscroll < 0)
: (hscroll > 0 || vscroll > 0);
if (isForwardScroll) {
scrollRight();
} else {
scrollLeft();
}
return true;
}
}
}
}
return super.onGenericMotionEvent(event);
}
private MotionEvent transformEvent(MotionEvent e, int headerPosition) {
if (headerPosition == MATCHED_STICKIED_HEADER) {
return e;
}
long downTime = e.getDownTime();
long eventTime = e.getEventTime();
int action = e.getAction();
int pointerCount = e.getPointerCount();
int[] pointerIds = getPointerIds(e);
MotionEvent.PointerCoords[] pointerCoords = getPointerCoords(e);
int metaState = e.getMetaState();
float xPrecision = e.getXPrecision();
float yPrecision = e.getYPrecision();
int deviceId = e.getDeviceId();
int edgeFlags = e.getEdgeFlags();
int source = e.getSource();
int flags = e.getFlags();
View headerHolder = getChildAt(headerPosition);
for (int i = 0; i < pointerCount;i++) {
pointerCoords[i].y -= headerHolder.getTop();
}
MotionEvent n = MotionEvent.obtain(downTime, eventTime, action,
pointerCount, pointerIds, pointerCoords, metaState, xPrecision,
yPrecision, deviceId, edgeFlags, source, flags);
return n;
}
private static MotionEvent transformEventOld(MotionEvent e, Matrix m) {
long downTime = e.getDownTime();
long eventTime = e.getEventTime();
int action = e.getAction();
int pointerCount = e.getPointerCount();
int[] pointerIds = getPointerIds(e);
PointerCoords[] pointerCoords = getPointerCoords(e);
int metaState = e.getMetaState();
float xPrecision = e.getXPrecision();
float yPrecision = e.getYPrecision();
int deviceId = e.getDeviceId();
int edgeFlags = e.getEdgeFlags();
int source = e.getSource();
int flags = e.getFlags();
// Copy the x and y coordinates into an array, map them, and copy back.
float[] xy = new float[pointerCoords.length * 2];
for (int i = 0; i < pointerCount;i++) {
xy[2 * i] = pointerCoords[i].x;
xy[2 * i + 1] = pointerCoords[i].y;
}
m.mapPoints(xy);
for (int i = 0; i < pointerCount;i++) {
pointerCoords[i].x = xy[2 * i];
pointerCoords[i].y = xy[2 * i + 1];
pointerCoords[i].orientation = transformAngle(
m, pointerCoords[i].orientation);
}
MotionEvent n = MotionEvent.obtain(downTime, eventTime, action,
pointerCount, pointerIds, pointerCoords, metaState, xPrecision,
yPrecision, deviceId, edgeFlags, source, flags);
return n;
}
public boolean doTouchEvent(MotionEvent event) {
if (event.getAction() == MotionEvent.ACTION_MOVE) {
mTouch.x = event.getX();
mTouch.y = event.getY();
this.postInvalidate();
}
if (event.getAction() == MotionEvent.ACTION_DOWN) {
mTouch.x = event.getX();
mTouch.y = event.getY();
actiondownX = event.getX();
actiondownY = event.getY();
}
if (event.getAction() == MotionEvent.ACTION_UP) {
startAnimation(1200);
this.postInvalidate();
}
if (event.getAction() == MotionEvent.ACTION_MOVE
&& event.getMetaState() == 1) {
mTouch.x = event.getX();
mTouch.y = event.getY();
startAnimation(1200);
this.postInvalidate();
}
// return super.onTouchEvent(event);
return true;
}
@Override
public boolean onGenericMotionEvent(MotionEvent event) {
if ((event.getSource() & InputDevice.SOURCE_CLASS_POINTER) != 0) {
switch (event.getAction()) {
case MotionEvent.ACTION_SCROLL: {
// Handle mouse (or ext. device) by shifting the page depending on the scroll
final float vscroll;
final float hscroll;
if ((event.getMetaState() & KeyEvent.META_SHIFT_ON) != 0) {
vscroll = 0;
hscroll = event.getAxisValue(MotionEvent.AXIS_VSCROLL);
} else {
vscroll = -event.getAxisValue(MotionEvent.AXIS_VSCROLL);
hscroll = event.getAxisValue(MotionEvent.AXIS_HSCROLL);
}
if (hscroll != 0 || vscroll != 0) {
boolean isForwardScroll = mIsRtl ? (hscroll < 0 || vscroll < 0)
: (hscroll > 0 || vscroll > 0);
if (isForwardScroll) {
scrollRight();
} else {
scrollLeft();
}
return true;
}
}
}
}
return super.onGenericMotionEvent(event);
}
@Override
public boolean onGenericMotionEvent(MotionEvent event) {
if ((event.getSource() & InputDevice.SOURCE_CLASS_POINTER) != 0) {
switch (event.getAction()) {
case MotionEvent.ACTION_SCROLL: {
// Handle mouse (or ext. device) by shifting the page depending on the scroll
final float vscroll;
final float hscroll;
if ((event.getMetaState() & KeyEvent.META_SHIFT_ON) != 0) {
vscroll = 0;
hscroll = event.getAxisValue(MotionEvent.AXIS_VSCROLL);
} else {
vscroll = -event.getAxisValue(MotionEvent.AXIS_VSCROLL);
hscroll = event.getAxisValue(MotionEvent.AXIS_HSCROLL);
}
if (hscroll != 0 || vscroll != 0) {
boolean isForwardScroll = isLayoutRtl() ? (hscroll < 0 || vscroll < 0)
: (hscroll > 0 || vscroll > 0);
if (isForwardScroll) {
scrollRight();
} else {
scrollLeft();
}
return true;
}
}
}
}
return super.onGenericMotionEvent(event);
}
@Override
public boolean onGenericMotionEvent(TextView widget, Spannable text, MotionEvent event) {
if ((ApiWrapper.getSourceOfEvent(event) & InputDevice.SOURCE_CLASS_POINTER) != 0) {
switch (event.getAction()) {
case MotionEvent.ACTION_SCROLL: {
final float vscroll;
final float hscroll;
if ((event.getMetaState() & KeyEvent.META_SHIFT_ON) != 0) {
vscroll = 0;
hscroll = ApiWrapper.getAxisValue(event,MotionEvent.AXIS_VSCROLL);
} else {
vscroll = -ApiWrapper.getAxisValue(event,MotionEvent.AXIS_VSCROLL);
hscroll = ApiWrapper.getAxisValue(event,MotionEvent.AXIS_HSCROLL);
}
boolean handled = false;
if (hscroll < 0) {
handled |= scrollLeft(widget, text, (int)Math.ceil(-hscroll));
} else if (hscroll > 0) {
handled |= scrollRight(widget, text, (int)Math.ceil(hscroll));
}
if (vscroll < 0) {
handled |= scrollUp(widget, text, (int)Math.ceil(-vscroll));
if ( handled ){
widget.moveCursorToVisibleOffset();
}
} else if (vscroll > 0) {
handled |= scrollDown(widget, text, (int)Math.ceil(vscroll));
if ( handled ){
widget.moveCursorToVisibleOffset();
}
}
return handled;
}
}
}
return false;
}
@Override
public boolean onGenericMotionEvent(MotionEvent event) {
if ((event.getSource() & InputDevice.SOURCE_CLASS_POINTER) != 0) {
switch (event.getAction()) {
case MotionEvent.ACTION_SCROLL: {
// Handle mouse (or ext. device) by shifting the page depending on the scroll
final float vscroll;
final float hscroll;
if ((event.getMetaState() & KeyEvent.META_SHIFT_ON) != 0) {
vscroll = 0;
hscroll = event.getAxisValue(MotionEvent.AXIS_VSCROLL);
} else {
vscroll = -event.getAxisValue(MotionEvent.AXIS_VSCROLL);
hscroll = event.getAxisValue(MotionEvent.AXIS_HSCROLL);
}
if (hscroll != 0 || vscroll != 0) {
boolean isForwardScroll = isLayoutRtl() ? (hscroll < 0 || vscroll < 0)
: (hscroll > 0 || vscroll > 0);
if (isForwardScroll) {
scrollRight();
} else {
scrollLeft();
}
return true;
}
}
}
}
return super.onGenericMotionEvent(event);
}
private MotionEvent transformEvent(MotionEvent e, int headerPosition) {
if (headerPosition == MATCHED_STICKIED_HEADER) {
return e;
}
long downTime = e.getDownTime();
long eventTime = e.getEventTime();
int action = e.getAction();
int pointerCount = e.getPointerCount();
int[] pointerIds = getPointerIds(e);
MotionEvent.PointerCoords[] pointerCoords = getPointerCoords(e);
int metaState = e.getMetaState();
float xPrecision = e.getXPrecision();
float yPrecision = e.getYPrecision();
int deviceId = e.getDeviceId();
int edgeFlags = e.getEdgeFlags();
int source = e.getSource();
int flags = e.getFlags();
View headerHolder = getChildAt(headerPosition);
for (int i = 0; i < pointerCount;i++) {
pointerCoords[i].y -= headerHolder.getTop();
}
MotionEvent n = MotionEvent.obtain(downTime, eventTime, action,
pointerCount, pointerIds, pointerCoords, metaState, xPrecision,
yPrecision, deviceId, edgeFlags, source, flags);
return n;
}
private MotionEvent transformEvent(MotionEvent e, int headerPosition) {
if (headerPosition == MATCHED_STICKIED_HEADER) {
return e;
}
long downTime = e.getDownTime();
long eventTime = e.getEventTime();
int action = e.getAction();
int pointerCount = e.getPointerCount();
int[] pointerIds = getPointerIds(e);
MotionEvent.PointerCoords[] pointerCoords = getPointerCoords(e);
int metaState = e.getMetaState();
float xPrecision = e.getXPrecision();
float yPrecision = e.getYPrecision();
int deviceId = e.getDeviceId();
int edgeFlags = e.getEdgeFlags();
int source = e.getSource();
int flags = e.getFlags();
View headerHolder = getChildAt(headerPosition);
for (int i = 0; i < pointerCount;i++) {
pointerCoords[i].y -= headerHolder.getTop();
}
MotionEvent n = MotionEvent.obtain(downTime, eventTime, action,
pointerCount, pointerIds, pointerCoords, metaState, xPrecision,
yPrecision, deviceId, edgeFlags, source, flags);
return n;
}
/**
* Handles touch events for dragging. You may want to do other actions
* like moving the cursor on touch as well.
*/
public static boolean onTouchEvent(TextView widget, Spannable buffer,
MotionEvent event) {
DragState[] ds;
switch (event.getActionMasked()) {
case MotionEvent.ACTION_DOWN:
ds = buffer.getSpans(0, buffer.length(), DragState.class);
for (int i = 0; i < ds.length; i++) {
buffer.removeSpan(ds[i]);
}
buffer.setSpan(new DragState(event.getX(), event.getY(),
widget.getScrollX(), widget.getScrollY()),
0, 0, Spannable.SPAN_MARK_MARK);
return true;
case MotionEvent.ACTION_UP:
ds = buffer.getSpans(0, buffer.length(), DragState.class);
for (int i = 0; i < ds.length; i++) {
buffer.removeSpan(ds[i]);
}
if (ds.length > 0 && ds[0].mUsed) {
return true;
} else {
return false;
}
case MotionEvent.ACTION_MOVE:
ds = buffer.getSpans(0, buffer.length(), DragState.class);
if (ds.length > 0) {
if (ds[0].mFarEnough == false) {
int slop = ViewConfiguration.get(widget.getContext()).getScaledTouchSlop();
if (Math.abs(event.getX() - ds[0].mX) >= slop ||
Math.abs(event.getY() - ds[0].mY) >= slop) {
ds[0].mFarEnough = true;
}
}
if (ds[0].mFarEnough) {
ds[0].mUsed = true;
boolean cap = (event.getMetaState() & KeyEvent.META_SHIFT_ON) != 0
|| MetaKeyKeyListener.getMetaState(buffer,
MetaKeyKeyListener.META_SHIFT_ON) == 1
|| MetaKeyKeyListener.getMetaState(buffer,
MetaKeyKeyListener.META_SELECTING) != 0;
float dx;
float dy;
if (cap) {
// if we're selecting, we want the scroll to go in
// the direction of the drag
dx = event.getX() - ds[0].mX;
dy = event.getY() - ds[0].mY;
} else {
dx = ds[0].mX - event.getX();
dy = ds[0].mY - event.getY();
}
ds[0].mX = event.getX();
ds[0].mY = event.getY();
int nx = widget.getScrollX() + (int) dx;
int ny = widget.getScrollY() + (int) dy;
int padding = widget.getTotalPaddingTop() + widget.getTotalPaddingBottom();
Layout layout = widget.getLayout();
ny = Math.min(ny, layout.getHeight() - (widget.getHeight() - padding));
ny = Math.max(ny, 0);
int oldX = widget.getScrollX();
int oldY = widget.getScrollY();
scrollTo(widget, layout, nx, ny);
// If we actually scrolled, then cancel the up action.
if (oldX != widget.getScrollX() || oldY != widget.getScrollY()) {
widget.cancelLongPress();
}
return true;
}
}
}
return false;
}