Ejemplo n.º 1
0
 @Override
 public boolean isScrollableChildUnscrolled() {
   final AbsListView listView = getCurrentListView();
   return listView != null
       && (listView.getChildCount() == 0
           || listView.getChildAt(0).getTop() == listView.getPaddingTop());
 }
Ejemplo n.º 2
0
  public void onScrollStateChanged(AbsListView view, int scrollState) {
    switch (scrollState) {
      case OnScrollListener.SCROLL_STATE_IDLE:
        mBusy = false;

        int first = view.getFirstVisiblePosition();
        int count = view.getChildCount();
        for (int i = 0; i < count; i++) {
          TextView t = (TextView) view.getChildAt(i);
          if (t.getTag() != null) {
            t.setText(mStrings[first + i]);
            t.setTag(null);
          }
        }

        mStatus.setText("Idle");
        break;
      case OnScrollListener.SCROLL_STATE_TOUCH_SCROLL:
        mBusy = true;
        mStatus.setText("Touch scroll");
        break;
      case OnScrollListener.SCROLL_STATE_FLING:
        mBusy = true;
        mStatus.setText("Fling");
        break;
    }
  }
Ejemplo n.º 3
0
 /**
  * 指针下移,请求下一个图片
  *
  * @return
  */
 private boolean nextRequest() {
   // 指针下移
   mCurrentPosition++;
   if (mCurrentPosition >= mHostView.getChildCount()) {
     mCurrentPosition = 0;
     return false;
   }
   return true;
 }
Ejemplo n.º 4
0
  public boolean shouldHandleAbsListViewLoadingMore(AbsListView absListView) {
    if (mIsLoadingMore
        || mCurrentRefreshStatus == RefreshStatus.REFRESHING
        || mLoadMoreFooterView == null
        || mDelegate == null
        || absListView == null
        || absListView.getAdapter() == null
        || absListView.getAdapter().getCount() == 0) {
      return false;
    }

    int lastChildBottom = 0;
    if (absListView.getChildCount() > 0) {
      // 如果AdapterView的子控件数量不为0,获取最后一个子控件的bottom
      lastChildBottom = absListView.getChildAt(absListView.getChildCount() - 1).getBottom();
    }
    return absListView.getLastVisiblePosition() == absListView.getAdapter().getCount() - 1
        && lastChildBottom <= absListView.getMeasuredHeight();
  }
Ejemplo n.º 5
0
  public boolean canChildScrollUp() {
    if (Build.VERSION.SDK_INT < 14) {
      if ((this.mTarget instanceof AbsListView)) {
        AbsListView absListView = (AbsListView) this.mTarget;
        return (absListView.getChildCount() > 0)
            && ((absListView.getFirstVisiblePosition() > 0)
                || (absListView.getChildAt(0).getTop() < absListView.getPaddingTop()));
      }

      return (ViewCompat.canScrollVertically(this.mTarget, -1)) || (this.mTarget.getScrollY() > 0);
    }

    return ViewCompat.canScrollVertically(this.mTarget, -1);
  }
 /**
  * @return Whether it is possible for the child view of this layout to scroll up. Override this if
  *     the child view is a custom view.
  */
 public boolean canChildScrollUp() {
   if (android.os.Build.VERSION.SDK_INT < 14) {
     if (mTarget instanceof AbsListView) {
       final AbsListView absListView = (AbsListView) mTarget;
       return absListView.getChildCount() > 0
           && (absListView.getFirstVisiblePosition() > 0
               || absListView.getChildAt(0).getTop() < absListView.getPaddingTop());
     } else {
       return mTarget.getScrollY() > 0;
     }
   } else {
     return ViewCompat.canScrollVertically(mTarget, -1);
   }
 }
Ejemplo n.º 7
0
 public static boolean canChildScrollUp(View view) {
   if (android.os.Build.VERSION.SDK_INT < 14) {
     if (view instanceof AbsListView) {
       final AbsListView absListView = (AbsListView) view;
       return absListView.getChildCount() > 0
           && (absListView.getFirstVisiblePosition() > 0
               || absListView.getChildAt(0).getTop() < absListView.getPaddingTop());
     } else {
       return view.getScrollY() > 0;
     }
   } else {
     return view.canScrollVertically(-1);
   }
 }
Ejemplo n.º 8
0
 @Override
 public void onScroll(
     AbsListView view, int firstVisibleItem, int visibleItemCount, int totalItemCount) {
   if (onLoadMoreListener != null && loadMore)
     for (int i = 0; i < view.getChildCount(); ++i) {
       View child = view.getChildAt(i);
       if (loadMore && child instanceof FooterLoadMoreViewGroup) {
         if (onLoadMoreListener != null) {
           loadMore = false;
           onLoadMoreListener.onLoadMore();
         }
       }
     }
 }
Ejemplo n.º 9
0
 /**
  * Copy From AbsListView (API Level >= 19)
  *
  * @param absListView AbsListView
  * @param direction Negative to check scrolling up, positive to check scrolling down.
  * @return true if the list can be scrolled in the specified direction, false otherwise
  */
 private boolean absListViewCanScrollList(AbsListView absListView, int direction) {
   final int childCount = absListView.getChildCount();
   if (childCount == 0) {
     return false;
   }
   final int firstPosition = absListView.getFirstVisiblePosition();
   if (direction > 0) { // can scroll down
     final int lastBottom = absListView.getChildAt(childCount - 1).getBottom();
     final int lastPosition = firstPosition + childCount;
     return lastPosition < absListView.getCount()
         || lastBottom > absListView.getHeight() - absListView.getPaddingTop();
   } else { // can scroll  up
     final int firstTop = absListView.getChildAt(0).getTop();
     return firstPosition > 0 || firstTop < absListView.getPaddingTop();
   }
 }
 public boolean canChildScrollDown() {
   if (android.os.Build.VERSION.SDK_INT < 14) {
     if (mTarget instanceof AbsListView) {
       final AbsListView absListView = (AbsListView) mTarget;
       View lastChild = absListView.getChildAt(absListView.getChildCount() - 1);
       if (lastChild != null) {
         return (absListView.getLastVisiblePosition() == (absListView.getCount() - 1))
             && lastChild.getBottom() > absListView.getPaddingBottom();
       } else {
         return false;
       }
     } else {
       return mTarget.getHeight() - mTarget.getScrollY() > 0;
     }
   } else {
     return ViewCompat.canScrollVertically(mTarget, 1);
   }
 }
Ejemplo n.º 11
0
 public static boolean canViewScrollUp(View view) {
   if (view == null) {
     return false;
   }
   if (Build.VERSION.SDK_INT < Build.VERSION_CODES.ICE_CREAM_SANDWICH) {
     if (view instanceof AbsListView) {
       final AbsListView absListView = (AbsListView) view;
       if (absListView.getChildCount() == 0) {
         return false;
       }
       return absListView.getFirstVisiblePosition() > 0
           || absListView.getChildAt(0).getTop() < absListView.getPaddingTop();
     } else {
       return view.getScrollY() > 0;
     }
   } else {
     return ViewCompat.canScrollVertically(view, -1);
   }
 }
Ejemplo n.º 12
0
  /*
   * (non-Javadoc)
   * @see android.widget.AbsListView.OnScrollListener#onScroll(android.widget.AbsListView, int, int, int)
   */
  @Override
  public void onScroll(
      AbsListView view, int firstVisibleItem, int visibleItemCount, int totalItemCount) {
    if (visibleItemCount == 0) {
      return;
    }

    // Fade MonthView Title/DayLabels as they're farther from the top of the View.
    for (int i = 0; i < view.getChildCount(); i++) {
      MonthView child = (MonthView) view.getChildAt(i);
      int top = child.getTop();
      int height = child.getHeight();
      int thresh = height / 2;

      // Fade out MonthViews that aren't in the most screen-dominate month.
      float percent;

      // Has fully faded out above the screen.
      if (top <= -thresh) {
        percent = MIN_MONTH_OPACITY;

        // Is fading out above the screen.
      } else if (top < 0 && top > -thresh) {
        percent = 1f - Math.abs(((float) top) / ((float) (-thresh)));
        if (percent < MIN_MONTH_OPACITY) {
          percent = MIN_MONTH_OPACITY;
        }
        // Has fully appeared on screen.
      } else if (top < thresh) {
        percent = 1f;
        // Is appearing on the screen.
      } else {
        percent = 1f - Math.abs(((float) top - thresh) / ((float) (height - thresh)));
        if (percent < MIN_MONTH_OPACITY) {
          percent = MIN_MONTH_OPACITY;
        }
      }
      child.setAlpha(percent);
    }
  }
Ejemplo n.º 13
0
  @Override
  public boolean onTouch(final View view, final MotionEvent motionEvent) {
    if (mViewWidth < 2) {
      mViewWidth = mListView.getWidth();
    }

    switch (motionEvent.getActionMasked()) {
      case MotionEvent.ACTION_DOWN:
        {
          if (mPaused) {
            return false;
          }

          // Find the child view that was touched (perform a hit test)
          final Rect rect = new Rect();
          final int childCount = mListView.getChildCount();
          final int[] listViewCoords = new int[2];
          mListView.getLocationOnScreen(listViewCoords);
          final int x = (int) motionEvent.getRawX() - listViewCoords[0];
          final int y = (int) motionEvent.getRawY() - listViewCoords[1];
          View child;
          for (int i = 0; i < childCount; i++) {
            child = mListView.getChildAt(i);
            child.getHitRect(rect);
            if (rect.contains(x, y)) {
              mDownView = child;
              break;
            }
          }

          if (mDownView != null) {
            mDownX = motionEvent.getRawX();
            mDownPosition = mListView.getPositionForView(mDownView);

            mVelocityTracker = VelocityTracker.obtain();
            mVelocityTracker.addMovement(motionEvent);
          }
          view.onTouchEvent(motionEvent);
          return true;
        }

      case MotionEvent.ACTION_UP:
        {
          if (mVelocityTracker == null) {
            break;
          }

          final float deltaX = motionEvent.getRawX() - mDownX;
          mVelocityTracker.addMovement(motionEvent);
          mVelocityTracker.computeCurrentVelocity(1000);
          final float velocityX = Math.abs(mVelocityTracker.getXVelocity());
          final float velocityY = Math.abs(mVelocityTracker.getYVelocity());
          boolean dismiss = false;
          boolean dismissRight = false;
          if (Math.abs(deltaX) > mViewWidth / 2 && mSwiping) {
            dismiss = true;
            dismissRight = deltaX > 0;
          } else if (mMinFlingVelocity <= velocityX
              && velocityX <= mMaxFlingVelocity
              && velocityY < velocityX
              && mSwiping
              && isDirectionValid(mVelocityTracker.getXVelocity())
              && deltaX >= mViewWidth * 0.2f) {
            dismiss = true;
            dismissRight = mVelocityTracker.getXVelocity() > 0;
          }
          if (dismiss) {
            // dismiss
            final View downView = mDownView; // mDownView gets null'd before animation ends
            final int downPosition = mDownPosition;
            ++mDismissAnimationRefCount;
            animate(mDownView)
                .translationX(dismissRight ? mViewWidth : -mViewWidth)
                .alpha(0)
                .setDuration(mAnimationTime)
                .setListener(
                    new AnimatorListenerAdapter() {
                      @Override
                      public void onAnimationEnd(final Animator animation) {
                        performDismiss(downView, downPosition);
                      }
                    });
          } else {
            // cancel
            animate(mDownView)
                .translationX(0)
                .alpha(1)
                .setDuration(mAnimationTime)
                .setListener(null);
          }
          mVelocityTracker = null;
          mDownX = 0;
          mDownView = null;
          mDownPosition = AdapterView.INVALID_POSITION;
          mSwiping = false;
          break;
        }

      case MotionEvent.ACTION_MOVE:
        {
          if (mUndoPopup.isShowing()) {
            // Send a delayed message to hide popup
            mHandler.sendMessageDelayed(mHandler.obtainMessage(mDelayedMsgId), mAutoHideDelay);
          }

          if (mVelocityTracker == null || mPaused) {
            break;
          }

          mVelocityTracker.addMovement(motionEvent);
          float deltaX = motionEvent.getRawX() - mDownX;
          // Only start swipe in correct direction
          if (isDirectionValid(deltaX)) {
            if (Math.abs(deltaX) > mSlop) {
              mSwiping = true;
              mListView.requestDisallowInterceptTouchEvent(true);

              // Cancel ListView's touch (un-highlighting the item)
              final MotionEvent cancelEvent = MotionEvent.obtain(motionEvent);
              cancelEvent.setAction(
                  MotionEvent.ACTION_CANCEL
                      | (motionEvent.getActionIndex() << MotionEvent.ACTION_POINTER_INDEX_SHIFT));
              mListView.onTouchEvent(cancelEvent);
            }
          } else {
            // If we swiped into wrong direction, act like this was the new
            // touch down point
            mDownX = motionEvent.getRawX();
            deltaX = 0;
          }

          if (mSwiping) {
            setTranslationX(mDownView, deltaX);
            setAlpha(
                mDownView, Math.max(0f, Math.min(1f, 1f - 2f * Math.abs(deltaX) / mViewWidth)));
            return true;
          }
          break;
        }
    }
    return false;
  }
Ejemplo n.º 14
0
  /**
   * 子控件为ListView等时,ACTION_MOVE执行几次后this.disallowIntercept=true;
   * 造成的影响:用户体验不好!(如果从中间滑到顶部或底部是不会进入onInterceptTouchEvent方法的,拦截不到事件,不能执行刷新加载相关功能)
   * 解决办法:重写requestDisallowInterceptTouchEvent,过滤disallowIntercept=true。
   * 缺点:这样会导致子控件调用parent.requestDisallowInterceptTouchEvent(true)失效。
   *
   * <p>ViewGroup类dispatchTouchEvent方法关键代码: final boolean disallowIntercept = (mGroupFlags &
   * FLAG_DISALLOW_INTERCEPT) != 0; if (!disallowIntercept) { intercepted =
   * onInterceptTouchEvent(ev); }
   *
   * @param ev
   * @return
   */
  @Override
  public boolean onInterceptTouchEvent(MotionEvent ev) {
    printLog("parent onInterceptTouchEvent:" + ev.getAction());
    int action = ev.getAction();
    if (pullView.doMainType == pullView.NONE && action == MotionEvent.ACTION_DOWN) {
      reset();
    }
    if (pullView.doMainType == pullView.REFRESHING || pullView.doMainType == pullView.LOADING) {
      printLog("parent onInterceptTouchEvent result:" + !refreshingOrLoadingOverScrollEnabled);
      return !refreshingOrLoadingOverScrollEnabled;
    }
    printLog("parent onInterceptTouchEvent result:" + isGetFinalDirection);
    if (isGetFinalDirection) {
      //            getParent().requestDisallowInterceptTouchEvent(true);
      return true;
    }
    // 得到可能的方向
    if (this.direction.type == Direction.NONE && this.directionEnable.type != Direction.NONE) {
      this.startY = ev.getY();
      printLog("startY:" + startY);
      for (View view : conditionChildViews) {
        printLog(view.getClass().getSimpleName());
        if (view instanceof AbsListView) {
          AbsListView absListView = (AbsListView) view;
          Direction direction = new Direction();
          View firstView = absListView.getChildAt(0);
          View lastView = absListView.getChildAt(absListView.getChildCount() - 1);
          if (firstView == null
              || (absListView.getFirstVisiblePosition() == 0
                  && firstView.getTop() >= view.getTop())) {
            printLog("顶部");
            direction.addDirection(Direction.DOWN_PULL);
          }
          if (lastView == null
              || (absListView.getLastVisiblePosition() == (absListView.getCount() - 1)
                  && lastView.getBottom() <= view.getBottom())) {
            printLog("底部");
            direction.addDirection(Direction.UP_PULL);
          }
          if (direction.type == Direction.NONE) {
            this.direction.type = Direction.NONE;
            printLog("NONE");
            break;
          }
          this.direction.configDirection(direction.type);
        } else if (view instanceof ScrollView) {
          ScrollView scrollView = (ScrollView) view;
          Direction direction = new Direction();
          int scrollY = view.getScrollY();
          int height = view.getHeight();
          int scrollViewMeasuredHeight = scrollView.getChildAt(0).getMeasuredHeight();
          if (scrollY == 0) {
            printLog("顶部");
            direction.addDirection(Direction.DOWN_PULL);
          }
          if ((scrollY + height) == scrollViewMeasuredHeight) {
            printLog("底部");
            direction.addDirection(Direction.UP_PULL);
          }
          if (direction.type == Direction.NONE) {
            this.direction.type = Direction.NONE;
            printLog("NONE");
            break;
          }
          this.direction.configDirection(direction.type);
        } else {
          if (view.getScrollY() == 0) {
            printLog("顶部");
            direction.addDirection(Direction.DOWN_PULL);
          }
          if (true) { // TODO 哈哈(待修改)
            printLog("底部");
            direction.addDirection(Direction.UP_PULL);
          }
          if (direction.type == Direction.NONE) {
            this.direction.type = Direction.NONE;
            printLog("NONE");
            break;
          }
          this.direction.configDirection(direction.type);
        }
      }
      this.direction.takeIntersection(this.directionEnable);
    }
    // 得到最终方向
    else if (this.direction.type != Direction.NONE) {
      findFinalDirection(ev);
    }

    return false;
  }
    @Override
    public void onScrollStateChanged(final AbsListView view, int scrollState) {
      super.onScrollStateChanged(view, scrollState);
      if (scrollState == AbsListView.OnScrollListener.SCROLL_STATE_IDLE) {
        int currentFirstVisiblePosition = view.getFirstVisiblePosition();
        if (currentFirstVisiblePosition == 0) {
          // 滚动到顶部
          View v = (View) view.getChildAt(0);
          int[] location = new int[2];
          // 获取在整个屏幕内的绝对坐标
          v.getLocationOnScreen(location);
          int y = location[1];
          if (currentFirstVisiblePosition != firstVisiblePosition && firstLocationY != y) {
            // 第一次拖至顶部
            firstVisiblePosition = currentFirstVisiblePosition;
            firstLocationY = y;
            return;
          } else if (currentFirstVisiblePosition == firstVisiblePosition && firstLocationY == y) {
            User firstUser = personList.get(0);
            // 第二次拖至顶部
            logic.queryUser(
                queryType,
                queryValue,
                ORDER_BY_NEWEST,
                firstUser.getLastLoginTime(),
                8,
                createUIEventListener(
                    new EventListener() {
                      @Override
                      public void onEvent(EventId id, EventArgs args) {
                        stopLoading();
                        UserEventArgs result = (UserEventArgs) args;
                        OperErrorCode errCode = result.getErrCode();
                        if (errCode == OperErrorCode.Success) {
                          List<User> userList = result.getUserList();
                          if (userList != null && userList.size() > 0) {
                            personList.addAll(0, userList);
                            imageAdapter.notifyDataSetChanged();
                            personsGridView.smoothScrollToPosition(0);
                          }
                        }
                      }
                    }));
            startLoading();
          }
        } else {
          int currentLastVisiblePosition = view.getLastVisiblePosition();
          if (currentLastVisiblePosition == (view.getCount() - 1)) {
            // 滚动到底部
            View v = (View) view.getChildAt(view.getChildCount() - 1);
            int[] location = new int[2];
            // 获取在整个屏幕内的绝对坐标
            v.getLocationOnScreen(location);
            int y = location[1];
            if (currentLastVisiblePosition != lastVisiblePosition && lastLocationY != y) {
              // 第一次拖至底部
              lastVisiblePosition = currentLastVisiblePosition;
              lastLocationY = y;
              return;
            } else if (currentLastVisiblePosition == lastVisiblePosition && lastLocationY == y) {
              // 第二次拖至底部
              User lastUser = personList.get(personList.size() - 1);
              // 第二次拖至顶部
              logic.queryUser(
                  queryType,
                  queryValue,
                  ORDER_BY_EARLIEST,
                  lastUser.getLastLoginTime(),
                  8,
                  createUIEventListener(
                      new EventListener() {
                        @Override
                        public void onEvent(EventId id, EventArgs args) {
                          stopLoading();
                          UserEventArgs result = (UserEventArgs) args;
                          OperErrorCode errCode = result.getErrCode();
                          if (errCode == OperErrorCode.Success) {
                            List<User> userList = result.getUserList();
                            if (userList != null && userList.size() > 0) {
                              personList.addAll(userList);
                              imageAdapter.notifyDataSetChanged();
                              personsGridView.smoothScrollToPosition(view.getCount());
                            }
                          }
                        }
                      }));
              startLoading();
            }
          }
        }

        // 未滚动到顶部
        firstVisiblePosition = -1;
        firstLocationY = 0;
        // 未滚动到底部
        lastVisiblePosition = 0;
        lastLocationY = 0;
      }
    }