List of usage examples for android.view View requestFocus
public final boolean requestFocus(int direction)
From source file:com.ferg.awfulapp.widget.AwfulViewPager.java
void populate() { if (mAdapter == null) { return;/*from w w w. j a v a2 s .c om*/ } // Bail now if we are waiting to populate. This is to hold off // on creating views from the time the user releases their finger to // fling to a new position until we have finished the scroll to // that position, avoiding glitches from happening at that point. if (mPopulatePending) { // if (DEBUG) Log.i(TAG, "populate is pending, skipping for now..."); return; } // Also, don't populate until we are attached to a window. This is to // avoid trying to populate before we have restored our view hierarchy // state and conflicting with what is restored. if (getWindowToken() == null) { return; } mAdapter.startUpdate(this); final int pageLimit = mOffscreenPageLimit; final int startPos = Math.max(0, mCurItem - pageLimit); final int N = mAdapter.getCount(); final int endPos = Math.min(N - 1, mCurItem + pageLimit); // if (DEBUG) Log.v(TAG, "populating: startPos=" + startPos + " endPos=" + endPos); // Add and remove pages in the existing list. int lastPos = -1; for (int i = 0; i < mItems.size(); i++) { ItemInfo ii = mItems.get(i); if ((ii.position < startPos || ii.position > endPos) && !ii.scrolling) { // if (DEBUG) Log.i(TAG, "removing: " + ii.position + " @ " + i); mItems.remove(i); i--; mAdapter.destroyItem(this, ii.position, ii.object); } else if (lastPos < endPos && ii.position > startPos) { // The next item is outside of our range, but we have a gap // between it and the last item where we want to have a page // shown. Fill in the gap. lastPos++; if (lastPos < startPos) { lastPos = startPos; } while (lastPos <= endPos && lastPos < ii.position) { // if (DEBUG) Log.i(TAG, "inserting: " + lastPos + " @ " + i); addNewItem(lastPos, i); lastPos++; i++; } } lastPos = ii.position; } // Add any new pages we need at the end. lastPos = mItems.size() > 0 ? mItems.get(mItems.size() - 1).position : -1; if (lastPos < endPos) { lastPos++; lastPos = lastPos > startPos ? lastPos : startPos; while (lastPos <= endPos) { // if (DEBUG) Log.i(TAG, "appending: " + lastPos); addNewItem(lastPos, -1); lastPos++; } } // if (DEBUG) { // Log.i(TAG, "Current page list:"); // for (int i=0; i<mItems.size(); i++) { // Log.i(TAG, "#" + i + ": page " + mItems.get(i).position); // } // } ItemInfo curItem = null; for (int i = 0; i < mItems.size(); i++) { if (mItems.get(i).position == mCurItem) { curItem = mItems.get(i); break; } } mAdapter.setPrimaryItem(this, mCurItem, curItem != null ? curItem.object : null); //this is probably a shitty hack. mCurFrag = (AwfulPagerFragment) (curItem != null ? curItem.object : null); mAdapter.finishUpdate(this); if (hasFocus()) { View currentFocused = findFocus(); ItemInfo ii = currentFocused != null ? infoForAnyChild(currentFocused) : null; if (ii == null || ii.position != mCurItem) { for (int i = 0; i < getChildCount(); i++) { View child = getChildAt(i); ii = infoForChild(child); if (ii != null && ii.position == mCurItem) { if (child.requestFocus(FOCUS_FORWARD)) { break; } } } } } }
From source file:com.tylz.jiaoyanglogistics.view.LazyViewPager.java
void populate() { if (mAdapter == null) { return;/* www. j a va2 s . c o m*/ } // Bail now if we are waiting to populate. This is to hold off // on creating views from the time the user releases their finger to // fling to a new position until we have finished the scroll to // that position, avoiding glitches from happening at that point. if (mPopulatePending) { if (DEBUG) { Log.i(TAG, "populate is pending, skipping for now..."); } return; } // Also, don't populate until we are attached to a window. This is to // avoid trying to populate before we have restored our view hierarchy // state and conflicting with what is restored. if (getWindowToken() == null) { return; } mAdapter.startUpdate(this); final int pageLimit = mOffscreenPageLimit; final int startPos = Math.max(0, mCurItem - pageLimit); final int N = mAdapter.getCount(); final int endPos = Math.min(N - 1, mCurItem + pageLimit); if (DEBUG) { Log.v(TAG, "populating: startPos=" + startPos + " endPos=" + endPos); } // Add and remove pages in the existing list. int lastPos = -1; for (int i = 0; i < mItems.size(); i++) { ItemInfo ii = mItems.get(i); if ((ii.position < startPos || ii.position > endPos) && !ii.scrolling) { if (DEBUG) { Log.i(TAG, "removing: " + ii.position + " @ " + i); } mItems.remove(i); i--; mAdapter.destroyItem(this, ii.position, ii.object); } else if (lastPos < endPos && ii.position > startPos) { // The next item is outside of our range, but we have a gap // between it and the last item where we want to have a page // shown. Fill in the gap. lastPos++; if (lastPos < startPos) { lastPos = startPos; } while (lastPos <= endPos && lastPos < ii.position) { if (DEBUG) { Log.i(TAG, "inserting: " + lastPos + " @ " + i); } addNewItem(lastPos, i); lastPos++; i++; } } lastPos = ii.position; } // Add any new pages we need at the end. lastPos = mItems.size() > 0 ? mItems.get(mItems.size() - 1).position : -1; if (lastPos < endPos) { lastPos++; lastPos = lastPos > startPos ? lastPos : startPos; while (lastPos <= endPos) { if (DEBUG) { Log.i(TAG, "appending: " + lastPos); } addNewItem(lastPos, -1); lastPos++; } } if (DEBUG) { Log.i(TAG, "Current page list:"); for (int i = 0; i < mItems.size(); i++) { Log.i(TAG, "#" + i + ": page " + mItems.get(i).position); } } ItemInfo curItem = null; for (int i = 0; i < mItems.size(); i++) { if (mItems.get(i).position == mCurItem) { curItem = mItems.get(i); break; } } mAdapter.setPrimaryItem(this, mCurItem, curItem != null ? curItem.object : null); mAdapter.finishUpdate(this); if (hasFocus()) { View currentFocused = findFocus(); ItemInfo ii = currentFocused != null ? infoForAnyChild(currentFocused) : null; if (ii == null || ii.position != mCurItem) { for (int i = 0; i < getChildCount(); i++) { View child = getChildAt(i); ii = infoForChild(child); if (ii != null && ii.position == mCurItem) { if (child.requestFocus(FOCUS_FORWARD)) { break; } } } } } }
From source file:org.immopoly.android.widget.ViewPager.java
void populate() { if (mAdapter == null) { return;/*from w w w. j a v a 2s . c o m*/ } // Bail now if we are waiting to populate. This is to hold off // on creating views from the time the user releases their finger to // fling to a new position until we have finished the scroll to // that position, avoiding glitches from happening at that point. if (mPopulatePending) { if (DEBUG) Log.i(TAG, "populate is pending, skipping for now..."); return; } // Also, don't populate until we are attached to a window. This is to // avoid trying to populate before we have restored our view hierarchy // state and conflicting with what is restored. if (getWindowToken() == null) { return; } mAdapter.startUpdate(this); final int pageLimit = mOffscreenPageLimit; final int startPos = Math.max(0, mCurItem - pageLimit); final int N = mAdapter.getCount(); final int endPos = Math.min(N - 1, mCurItem + pageLimit); if (DEBUG) Log.v(TAG, "populating: startPos=" + startPos + " endPos=" + endPos); // Add and remove pages in the existing list. int lastPos = -1; for (int i = 0; i < mItems.size(); i++) { ItemInfo ii = mItems.get(i); if ((ii.position < startPos - 1 || ii.position > endPos + 1) && !ii.scrolling) { if (DEBUG) Log.i(TAG, "removing: " + ii.position + " @ " + i); mItems.remove(i); i--; mAdapter.destroyItem(this, ii.position, ii.object); } else if (lastPos < endPos && ii.position > startPos) { // The next item is outside of our range, but we have a gap // between it and the last item where we want to have a page // shown. Fill in the gap. lastPos++; if (lastPos < startPos) { lastPos = startPos; } while (lastPos <= endPos && lastPos < ii.position) { if (DEBUG) Log.i(TAG, "inserting: " + lastPos + " @ " + i); addNewItem(lastPos, i); lastPos++; i++; } } lastPos = ii.position; } // Add any new pages we need at the end. lastPos = mItems.size() > 0 ? mItems.get(mItems.size() - 1).position : -1; if (lastPos < endPos) { lastPos++; lastPos = lastPos > startPos ? lastPos : startPos; while (lastPos <= endPos) { if (DEBUG) Log.i(TAG, "appending: " + lastPos); addNewItem(lastPos, -1); lastPos++; } } if (DEBUG) { Log.i(TAG, "Current page list:"); for (int i = 0; i < mItems.size(); i++) { Log.i(TAG, "#" + i + ": page " + mItems.get(i).position); } } ItemInfo curItem = null; for (int i = 0; i < mItems.size(); i++) { if (mItems.get(i).position == mCurItem) { curItem = mItems.get(i); break; } } mAdapter.setPrimaryItem(this, mCurItem, curItem != null ? curItem.object : null); mAdapter.finishUpdate(this); if (hasFocus()) { View currentFocused = findFocus(); ItemInfo ii = currentFocused != null ? infoForAnyChild(currentFocused) : null; if (ii == null || ii.position != mCurItem) { for (int i = 0; i < getChildCount(); i++) { View child = getChildAt(i); ii = infoForChild(child); if (ii != null && ii.position == mCurItem) { if (child.requestFocus(FOCUS_FORWARD)) { break; } } } } } }
From source file:com.peerless2012.twowaynestedscrollview.TwoWayNestedScrollView.java
/** * You can call this function yourself to have the scroll view perform * scrolling from a key event, just as if the event had been dispatched to * it by the view hierarchy.//from ww w .j a v a2 s . c om * * @param event * The key event to execute. * @return Return true if the event was handled, else false. */ public boolean executeKeyEvent(KeyEvent event) { mTempRect.setEmpty(); if (!canVerticalScroll()) { if (isFocused() && event.getKeyCode() != KeyEvent.KEYCODE_BACK) { View currentFocused = findFocus(); if (currentFocused == this) currentFocused = null; View nextFocused = FocusFinder.getInstance().findNextFocus(this, currentFocused, View.FOCUS_DOWN); return nextFocused != null && nextFocused != this && nextFocused.requestFocus(View.FOCUS_DOWN); } return false; } if (!canHorizontalScroll()) { if (isFocused() && event.getKeyCode() != KeyEvent.KEYCODE_BACK) { View currentFocused = findFocus(); if (currentFocused == this) currentFocused = null; View nextFocused = FocusFinder.getInstance().findNextFocus(this, currentFocused, View.FOCUS_DOWN); return nextFocused != null && nextFocused != this && nextFocused.requestFocus(View.FOCUS_DOWN); } return false; } boolean handled = false; if (event.getAction() == KeyEvent.ACTION_DOWN) { switch (event.getKeyCode()) { case KeyEvent.KEYCODE_DPAD_UP: if (!event.isAltPressed()) { handled = arrowScroll(View.FOCUS_UP); } else { handled = fullScroll(View.FOCUS_UP); } break; case KeyEvent.KEYCODE_DPAD_DOWN: if (!event.isAltPressed()) { handled = arrowScroll(View.FOCUS_DOWN); } else { handled = fullScroll(View.FOCUS_DOWN); } break; case KeyEvent.KEYCODE_SPACE: pageScroll(event.isShiftPressed() ? View.FOCUS_UP : View.FOCUS_DOWN); break; } } return handled; }
From source file:com.hippo.widget.BothScrollView.java
/** * You can call this function yourself to have the scroll view perform * scrolling from a key event, just as if the event had been dispatched to * it by the view hierarchy.//from w ww .java 2s . c o m * * @param event The key event to execute. * @return Return true if the event was handled, else false. */ public boolean executeKeyEvent(KeyEvent event) { mTempRect.setEmpty(); if (!canScrollHorizontally()) { if (isFocused() && event.getKeyCode() != KeyEvent.KEYCODE_BACK) { View currentFocused = findFocus(); if (currentFocused == this) { currentFocused = null; } View nextFocused = FocusFinder.getInstance().findNextFocus(this, currentFocused, View.FOCUS_RIGHT); return nextFocused != null && nextFocused != this && nextFocused.requestFocus(View.FOCUS_RIGHT); } return false; } if (!canScrollVertically()) { if (isFocused() && event.getKeyCode() != KeyEvent.KEYCODE_BACK) { View currentFocused = findFocus(); if (currentFocused == this) { currentFocused = null; } View nextFocused = FocusFinder.getInstance().findNextFocus(this, currentFocused, View.FOCUS_DOWN); return nextFocused != null && nextFocused != this && nextFocused.requestFocus(View.FOCUS_DOWN); } return false; } boolean handled = false; if (event.getAction() == KeyEvent.ACTION_DOWN) { switch (event.getKeyCode()) { case KeyEvent.KEYCODE_DPAD_LEFT: if (!event.isAltPressed()) { handled = arrowScrollHorizontally(View.FOCUS_LEFT); } else { handled = fullScroll(View.FOCUS_LEFT); } break; case KeyEvent.KEYCODE_DPAD_RIGHT: if (!event.isAltPressed()) { handled = arrowScrollHorizontally(View.FOCUS_RIGHT); } else { handled = fullScroll(View.FOCUS_RIGHT); } break; case KeyEvent.KEYCODE_DPAD_UP: if (!event.isAltPressed()) { handled = arrowScrollVertically(View.FOCUS_UP); } else { handled = fullScroll(View.FOCUS_UP); } break; case KeyEvent.KEYCODE_DPAD_DOWN: if (!event.isAltPressed()) { handled = arrowScrollVertically(View.FOCUS_DOWN); } else { handled = fullScroll(View.FOCUS_DOWN); } break; case KeyEvent.KEYCODE_SPACE: if (event.isCtrlPressed()) { pageScroll(event.isShiftPressed() ? View.FOCUS_LEFT : View.FOCUS_RIGHT); } else { pageScroll(event.isShiftPressed() ? View.FOCUS_UP : View.FOCUS_DOWN); } break; } } return handled; }
From source file:org.fireking.app.view.LazyLoadViewPager.java
void populate() { if (mAdapter == null) { return;//www. j a v a 2 s . co m } // Bail now if we are waiting to populate. This is to hold off // on creating views from the time the user releases their finger to // fling to a new position until we have finished the scroll to // that position, avoiding glitches from happening at that point. if (mPopulatePending) { if (DEBUG) Log.i(TAG, "populate is pending, skipping for now..."); return; } // Also, don't populate until we are attached to a window. This is to // avoid trying to populate before we have restored our view hierarchy // state and conflicting with what is restored. if (getWindowToken() == null) { return; } mAdapter.startUpdate(this); final int pageLimit = mOffscreenPageLimit; final int startPos = Math.max(0, mCurItem - pageLimit);// 0- 4 final int N = mAdapter.getCount(); final int endPos = Math.min(N, mCurItem + pageLimit);// 1- 5 // final int endPos = Math.min(N - 1, mCurItem + 1); // Add and remove pages in the existing list. int lastPos = -1; for (int i = 0; i < mItems.size(); i++) { ItemInfo ii = mItems.get(i); if ((ii.position < startPos || ii.position > endPos) && !ii.scrolling) { mItems.remove(i); i--; mAdapter.destroyItem(this, ii.position, ii.object); } else if (lastPos < endPos && ii.position > startPos) { // The next item is outside of our range, but we have a gap // between it and the last item where we want to have a page // shown. Fill in the gap. lastPos++; if (lastPos < startPos) { lastPos = startPos; } while (lastPos < endPos && lastPos < ii.position) { if (lastPos == (endPos - 1) && endPos == mCurItem + 1) { addNewItem(lastPos, i); } lastPos++; i++; } } lastPos = ii.position; } // Add any new pages we need at the end. lastPos = mItems.size() > 0 ? mItems.get(mItems.size() - 1).position : -1; if (lastPos < endPos) { ++lastPos; lastPos = lastPos > startPos ? lastPos : startPos; while (lastPos < endPos) { addNewItem(lastPos, -1); lastPos++; } } if (DEBUG) { Log.i(TAG, "Current page list:"); for (int i = 0; i < mItems.size(); i++) { Log.i(TAG, "#" + i + ": page " + mItems.get(i).position); } } ItemInfo curItem = null; for (int i = 0; i < mItems.size(); i++) { if (mItems.get(i).position == mCurItem) { curItem = mItems.get(i); break; } } mAdapter.setPrimaryItem(this, mCurItem, curItem != null ? curItem.object : null); mAdapter.finishUpdate(this); if (hasFocus()) { View currentFocused = findFocus(); ItemInfo ii = currentFocused != null ? infoForAnyChild(currentFocused) : null; if (ii == null || ii.position != mCurItem) { for (int i = 0; i < getChildCount(); i++) { View child = getChildAt(i); ii = infoForChild(child); if (ii != null && ii.position == mCurItem) { if (child.requestFocus(FOCUS_FORWARD)) { break; } } } } } }
From source file:com.apptentive.android.sdk.view.ApptentiveNestedScrollView.java
/** * Handle scrolling in response to an up or down arrow click. * * @param direction The direction corresponding to the arrow key that was * pressed/*w w w. j av a2 s. c o m*/ * @return True if we consumed the event, false otherwise */ public boolean arrowScroll(int direction) { View currentFocused = findFocus(); if (currentFocused == this) currentFocused = null; View nextFocused = FocusFinder.getInstance().findNextFocus(this, currentFocused, direction); final int maxJump = getMaxScrollAmount(); if (nextFocused != null && isWithinDeltaOfScreen(nextFocused, maxJump, getHeight())) { nextFocused.getDrawingRect(mTempRect); offsetDescendantRectToMyCoords(nextFocused, mTempRect); int scrollDelta = computeScrollDeltaToGetChildRectOnScreen(mTempRect); doScrollY(scrollDelta); nextFocused.requestFocus(direction); } else { // no new focus int scrollDelta = maxJump; if (direction == View.FOCUS_UP && getScrollY() < scrollDelta) { scrollDelta = getScrollY(); } else if (direction == View.FOCUS_DOWN) { if (getChildCount() > 0) { int daBottom = getChildAt(0).getBottom(); int screenBottom = getScrollY() + getHeight() - getPaddingBottom(); if (daBottom - screenBottom < maxJump) { scrollDelta = daBottom - screenBottom; } } } if (scrollDelta == 0) { return false; } doScrollY(direction == View.FOCUS_DOWN ? scrollDelta : -scrollDelta); } if (currentFocused != null && currentFocused.isFocused() && isOffScreen(currentFocused)) { // previously focused item still has focus and is off screen, give // it up (take it back to ourselves) // (also, need to temporarily force FOCUS_BEFORE_DESCENDANTS so we are // sure to // get it) final int descendantFocusability = getDescendantFocusability(); // save setDescendantFocusability(ViewGroup.FOCUS_BEFORE_DESCENDANTS); requestFocus(); setDescendantFocusability(descendantFocusability); // restore } return true; }
From source file:beichen.douban.ui.view.LazyViewPager.java
void populate() { if (mAdapter == null) { return;//w w w .j a v a 2 s . c o m } // Bail now if we are waiting to populate. This is to hold off // on creating views from the time the user releases their finger to // fling to a new position until we have finished the scroll to // that position, avoiding glitches from happening at that point. if (mPopulatePending) { if (DEBUG) Log.i(TAG, "populate is pending, skipping for now..."); return; } // Also, don't populate until we are attached to a window. This is to // avoid trying to populate before we have restored our view hierarchy // state and conflicting with what is restored. if (getWindowToken() == null) { return; } mAdapter.startUpdate(this); final int pageLimit = mOffscreenPageLimit; final int startPos = Math.max(0, mCurItem - pageLimit); final int N = mAdapter.getCount(); final int endPos = Math.min(N - 1, mCurItem + pageLimit); if (DEBUG) Log.v(TAG, "populating: startPos=" + startPos + " endPos=" + endPos); // Add and remove pages in the existing list. int lastPos = -1; for (int i = 0; i < mItems.size(); i++) { ItemInfo ii = mItems.get(i); if ((ii.position < startPos || ii.position > endPos) && !ii.scrolling) { if (DEBUG) Log.i(TAG, "removing: " + ii.position + " @ " + i); mItems.remove(i); i--; mAdapter.destroyItem(this, ii.position, ii.object); } else if (lastPos < endPos && ii.position > startPos) { // The next item is outside of our range, but we have a gap // between it and the last item where we want to have a page // shown. Fill in the gap. lastPos++; if (lastPos < startPos) { lastPos = startPos; } while (lastPos <= endPos && lastPos < ii.position) { if (DEBUG) Log.i(TAG, "inserting: " + lastPos + " @ " + i); addNewItem(lastPos, i); lastPos++; i++; } } lastPos = ii.position; } // Add any new pages we need at the end. lastPos = mItems.size() > 0 ? mItems.get(mItems.size() - 1).position : -1; if (lastPos < endPos) { lastPos++; lastPos = lastPos > startPos ? lastPos : startPos; while (lastPos <= endPos) { if (DEBUG) Log.i(TAG, "appending: " + lastPos); addNewItem(lastPos, -1); lastPos++; } } if (DEBUG) { Log.i(TAG, "Current page list:"); for (int i = 0; i < mItems.size(); i++) { Log.i(TAG, "#" + i + ": page " + mItems.get(i).position); } } ItemInfo curItem = null; for (int i = 0; i < mItems.size(); i++) { if (mItems.get(i).position == mCurItem) { curItem = mItems.get(i); break; } } mAdapter.setPrimaryItem(this, mCurItem, curItem != null ? curItem.object : null); mAdapter.finishUpdate(this); if (hasFocus()) { View currentFocused = findFocus(); ItemInfo ii = currentFocused != null ? infoForAnyChild(currentFocused) : null; if (ii == null || ii.position != mCurItem) { for (int i = 0; i < getChildCount(); i++) { View child = getChildAt(i); ii = infoForChild(child); if (ii != null && ii.position == mCurItem) { if (child.requestFocus(FOCUS_FORWARD)) { break; } } } } } }
From source file:cn.zy.ef.widget.VerticalViewPager.java
/** * ??ViewPage?/*from ww w . j ava 2s . c o m*/ */ void populate() { if (mAdapter == null) { return; } /* end of if */ // Bail now if we are waiting to populate. This is to hold off // on creating views from the time the user releases their finger to // fling to a new position until we have finished the scroll to // that position, avoiding glitches from happening at that point. if (mPopulatePending) { if (DEBUG) Log.i(TAG, "populate is pending, skipping for now..."); return; } /* end of if */ // Also, don't populate until we are attached to a window. This is to // avoid trying to populate before we have restored our view hierarchy // state and conflicting with what is restored. if (getWindowToken() == null) { return; } /* end of if */ mAdapter.startUpdate(this); final int pageLimit = mOffscreenPageLimit; final int startPos = Math.max(0, mCurItem - pageLimit); final int N = mAdapter.getCount(); final int endPos = Math.min(N - 1, mCurItem + pageLimit); if (DEBUG) Log.v(TAG, "populating: startPos=" + startPos + " endPos=" + endPos); // Add and remove pages in the existing list. int lastPos = -1; for (int i = 0; i < mItems.size(); i++) { ItemInfo ii = mItems.get(i); if ((ii.position < startPos || ii.position > endPos) && !ii.scrolling) { if (DEBUG) Log.i(TAG, "removing: " + ii.position + " @ " + i); mItems.remove(i); i--; mAdapter.destroyItem(this, ii.position, ii.object); } else if (lastPos < endPos && ii.position > startPos) { // The next item is outside of our range, but we have a gap // between it and the last item where we want to have a page // shown. Fill in the gap. lastPos++; if (lastPos < startPos) { lastPos = startPos; } /* end of if */ while (lastPos <= endPos && lastPos < ii.position) { if (DEBUG) Log.i(TAG, "inserting: " + lastPos + " @ " + i); addNewItem(lastPos, i); lastPos++; i++; } /* end of while */ } /* end of if */ lastPos = ii.position; } /* end of if */ // Add any new pages we need at the end. lastPos = mItems.size() > 0 ? mItems.get(mItems.size() - 1).position : -1; if (lastPos < endPos) { lastPos++; lastPos = lastPos > startPos ? lastPos : startPos; while (lastPos <= endPos) { if (DEBUG) Log.i(TAG, "appending: " + lastPos); addNewItem(lastPos, -1); lastPos++; } /* end of while */ } /* end of if */ if (DEBUG) { Log.i(TAG, "Current page list:"); for (int i = 0; i < mItems.size(); i++) { Log.i(TAG, "#" + i + ": page " + mItems.get(i).position); } /* end of for */ } /* end of if */ ItemInfo curItem = null; for (int i = 0; i < mItems.size(); i++) { if (mItems.get(i).position == mCurItem) { curItem = mItems.get(i); break; } /* end of if */ } /* end of for */ mAdapter.setPrimaryItem(this, mCurItem, curItem != null ? curItem.object : null); mAdapter.finishUpdate(this); if (hasFocus()) { View currentFocused = findFocus(); ItemInfo ii = currentFocused != null ? infoForAnyChild(currentFocused) : null; if (ii == null || ii.position != mCurItem) { for (int i = 0; i < getChildCount(); i++) { View child = getChildAt(i); ii = infoForChild(child); if (ii != null && ii.position == mCurItem) { if (child.requestFocus(FOCUS_FORWARD)) { break; } /* end of if */ } /* end of if */ } /* end of for */ } /* end of if */ } /* end of if */ }
From source file:administrator.example.com.myscrollview.VerticalViewPager.java
/** * ??ViewPage?//from ww w. jav a 2s .co m */ void populate() { if (mAdapter == null) { return; } /* end of if */ // Bail now if we are waiting to populate. This is to hold off // on creating views from the time the user releases their finger to // fling to a new position until we have finished the scroll to // that position, avoiding glitches from happening at that point. if (mPopulatePending) { if (DEBUG) Log.i(TAG, "populate is pending, skipping for now..."); return; } /* end of if */ // Also, don't populate until we are attached to a window. This is to // avoid trying to populate before we have restored our view hierarchy // state and conflicting with what is restored. if (getWindowToken() == null) { return; } /* end of if */ mAdapter.startUpdate(this); final int pageLimit = mOffscreenPageLimit; final int startPos = Math.max(0, mCurItem - pageLimit); final int N = mAdapter.getCount(); final int endPos = Math.min(N - 1, mCurItem + pageLimit); if (DEBUG) Log.v(TAG, "populating: startPos=" + startPos + " endPos=" + endPos); // Add and remove pages in the existing list. int lastPos = -1; for (int i = 0; i < mItems.size(); i++) { ItemInfo ii = mItems.get(i); if ((ii.position < startPos || ii.position > endPos) && !ii.scrolling) { if (DEBUG) Log.i(TAG, "removing: " + ii.position + " @ " + i); mItems.remove(i); i--; mAdapter.destroyItem(this, ii.position, ii.object); } else if (lastPos < endPos && ii.position > startPos) { // The next item is outside of our range, but we have a gap // between it and the last item where we want to have a page // shown. Fill in the gap. lastPos++; if (lastPos < startPos) { lastPos = startPos; } /* end of if */ while (lastPos <= endPos && lastPos < ii.position) { if (DEBUG) Log.i(TAG, "inserting: " + lastPos + " @ " + i); addNewItem(lastPos, i, null); lastPos++; i++; } /* end of while */ } /* end of if */ lastPos = ii.position; } /* end of if */ // Add any new pages we need at the end. lastPos = mItems.size() > 0 ? mItems.get(mItems.size() - 1).position : -1; if (lastPos < endPos) { lastPos++; lastPos = lastPos > startPos ? lastPos : startPos; while (lastPos <= endPos) { if (DEBUG) Log.i(TAG, "appending: " + lastPos); addNewItem(lastPos, -1, null); lastPos++; } /* end of while */ } /* end of if */ if (DEBUG) { Log.i(TAG, "Current page list:"); for (int i = 0; i < mItems.size(); i++) { Log.i(TAG, "#" + i + ": page " + mItems.get(i).position); } /* end of for */ } /* end of if */ ItemInfo curItem = null; for (int i = 0; i < mItems.size(); i++) { if (mItems.get(i).position == mCurItem) { curItem = mItems.get(i); break; } /* end of if */ } /* end of for */ mAdapter.setPrimaryItem(this, mCurItem, curItem != null ? curItem.object : null); mAdapter.finishUpdate(this); if (hasFocus()) { View currentFocused = findFocus(); ItemInfo ii = currentFocused != null ? infoForAnyChild(currentFocused) : null; if (ii == null || ii.position != mCurItem) { for (int i = 0; i < getChildCount(); i++) { View child = getChildAt(i); ii = infoForChild(child); if (ii != null && ii.position == mCurItem) { if (child.requestFocus(FOCUS_FORWARD)) { break; } /* end of if */ } /* end of if */ } /* end of for */ } /* end of if */ } /* end of if */ }