Java tutorial
/** * The MIT License (MIT) * <p> * Copyright (c) 2014 singwhatiwanna * https://github.com/singwhatiwanna * http://blog.csdn.net/singwhatiwanna * <p> * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * <p> * The above copyright notice and this permission notice shall be included in all * copies or substantial portions of the Software. * <p> * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ package com.summer.view.pinnedheaderexpandablelistview.expandable.ui; import android.content.Context; import android.graphics.Canvas; import android.graphics.Rect; import android.support.v4.view.ViewCompat; import android.util.AttributeSet; import android.view.MotionEvent; import android.view.View; import android.view.ViewGroup; import android.widget.AbsListView; import android.widget.ExpandableListView; import android.widget.AbsListView.OnScrollListener; import com.summer.util.LogUtil; import com.summer.view.chart.linearchat.bean.databean.Value; import com.summer.view.swipeview.view.SwipeView; public class PinnedHeaderExpandableListView extends ExpandableListView implements OnScrollListener { private static final String TAG = "PinnedHeaderExpandableListView"; private static final boolean DEBUG = true; OnItemClickListener onHeadViewClick; public interface OnHeaderUpdateListener { /** * view?? * ?view?LayoutParams */ public View getPinnedHeader(); public void updatePinnedHeader(View headerView, int firstVisibleGroupPos); } private View mHeaderView; private int mHeaderWidth; private int mHeaderHeight; private View mTouchTarget; private OnScrollListener mScrollListener; private OnHeaderUpdateListener mHeaderUpdateListener; private boolean mActionDownHappened = false; protected boolean mIsHeaderGroupClickable = true; public PinnedHeaderExpandableListView(Context context) { super(context); initView(); } public PinnedHeaderExpandableListView(Context context, AttributeSet attrs) { super(context, attrs); initView(); } public PinnedHeaderExpandableListView(Context context, AttributeSet attrs, int defStyle) { super(context, attrs, defStyle); initView(); } private void initView() { setFadingEdgeLength(0); setOnScrollListener(this); } @Override public void setOnScrollListener(OnScrollListener l) { if (l != this) { mScrollListener = l; } else { mScrollListener = null; } super.setOnScrollListener(this); } /** * group? * * @param onGroupClickListener ? * @param isHeaderGroupClickable header??<br/> * note : ?group??OnGroupClickListener#onGroupClicktrue * isHeaderGroupClickablefalse?? */ public void setOnGroupClickListener(OnGroupClickListener onGroupClickListener, boolean isHeaderGroupClickable) { mIsHeaderGroupClickable = isHeaderGroupClickable; super.setOnGroupClickListener(onGroupClickListener); } public void setOnHeaderUpdateListener(OnHeaderUpdateListener listener) { mHeaderUpdateListener = listener; if (listener == null) { mHeaderView = null; mHeaderWidth = mHeaderHeight = 0; return; } mHeaderView = listener.getPinnedHeader(); int firstVisiblePos = getFirstVisiblePosition(); int firstVisibleGroupPos = getPackedPositionGroup(getExpandableListPosition(firstVisiblePos)); listener.updatePinnedHeader(mHeaderView, firstVisibleGroupPos); requestLayout(); postInvalidate(); } @Override protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { // heightMeasureSpec = MeasureSpec.makeMeasureSpec(Integer.MAX_VALUE>>2,MeasureSpec.AT_MOST); super.onMeasure(widthMeasureSpec, heightMeasureSpec); if (mHeaderView == null) { return; } measureChild(mHeaderView, widthMeasureSpec, heightMeasureSpec); mHeaderWidth = mHeaderView.getMeasuredWidth(); mHeaderHeight = mHeaderView.getMeasuredHeight(); } @Override protected void onLayout(boolean changed, int l, int t, int r, int b) { super.onLayout(changed, l, t, r, b); if (mHeaderView == null) { return; } int delta = mHeaderView.getTop(); mHeaderView.layout(0, delta, mHeaderWidth, mHeaderHeight + delta); } @Override protected void dispatchDraw(Canvas canvas) { super.dispatchDraw(canvas); if (mHeaderView != null && mHeaderView.getVisibility() == View.VISIBLE) { drawChild(canvas, mHeaderView, getDrawingTime()); } } @Override public boolean onTouchEvent(MotionEvent ev) { if (getHeadview() != null) { switch (ev.getAction()) { case MotionEvent.ACTION_DOWN: if (ev.getY() <= getHeadview().getMeasuredHeight()) { p = (int) ((ev.getX() / (getMeasuredWidth() / 3)) + 1); } break; case MotionEvent.ACTION_UP: if (p == (int) ((ev.getX() / (getMeasuredWidth() / 3)) + 1)) { onHeadViewClick.onItemClick(this, headview, p, -1); } p = 0; break; } } // int x = (int) ev.getX(); // int y = (int) ev.getY(); // int pos = pointToPosition(x, y); // if (mHeaderView != null && y >= mHeaderView.getTop() && y <= mHeaderView.getBottom()) { // switch (ev.getAction()){ // case MotionEvent.ACTION_DOWN: // mTouchTarget = getTouchTarget(mHeaderView, x, y); // mActionDownHappened = true; // downx=x; // downy=y; // // break; // case MotionEvent.ACTION_MOVE: // movex=x; // movey=y; // break; // case MotionEvent.ACTION_UP: // View touchTarget = getTouchTarget(mHeaderView, x, y); // if (touchTarget == mTouchTarget && mTouchTarget.isClickable()) { // mTouchTarget.performClick(); // invalidate(new Rect(0, 0, mHeaderWidth, mHeaderHeight)); // } else if (mIsHeaderGroupClickable){ // int groupPosition = getPackedPositionGroup(getExpandableListPosition(pos)); // if (groupPosition != INVALID_POSITION && mActionDownHappened) { // if (isGroupExpanded(groupPosition)) { // collapseGroup(groupPosition); // } else { // expandGroup(groupPosition); // } // } // } // mActionDownHappened = false; // break; // } // return true; // } return super.onTouchEvent(ev); } Value[] values = new Value[] { new Value(0, 0), new Value(0, 0), new Value(0, 0), new Value(0, 0), new Value(0, 0), new Value(0, 0) }; int status = -1; @Override public boolean dispatchTouchEvent(MotionEvent ev) { int x = (int) ev.getX(); int y = (int) ev.getY(); int pos = pointToPosition(x, y); switch (ev.getAction()) { case MotionEvent.ACTION_DOWN: status = 0; values[0].setX(ev.getX()); values[0].setY(ev.getY()); break; case MotionEvent.ACTION_MOVE: values[1].setX(ev.getX()); values[1].setY(ev.getY()); if ((Math.abs((values[1].getY() - values[0].getY())) / Math.abs((values[1].getX() - values[0].getX()))) > 1) { if (status != 1) { for (int i = 0; i < getChildCount(); i++) { if (getChildAt(i) instanceof SwipeView) { SwipeView swipeView = (SwipeView) getChildAt(i); if (swipeView.getFinishView() != null && ViewCompat.getTranslationX(swipeView.getChildView()) != 0) { swipeView.endAnimatorTranslationX(); } } } } status = 1; } break; case MotionEvent.ACTION_UP: status = 2; values[2].setX(ev.getX()); values[2].setY(ev.getY()); break; } if (getHeadview() != null) { switch (ev.getAction()) { case MotionEvent.ACTION_DOWN: LogUtil.E(getHeadview().getBottom()); if (ev.getY() <= getHeadview().getBottom()) { p = (int) ((ev.getX() / (getWidth() / 3)) + 1); values[5].setX(-1); } else { values[5].setX(0); } break; case MotionEvent.ACTION_UP: if (values[5].getX() == -1 && p == (int) ((ev.getX() / (getWidth() / 3)) + 1)) { onHeadViewClick.onItemClick(this, headview, p, -1); } p = 0; break; } } if (mHeaderView != null && y >= mHeaderView.getTop() && y <= mHeaderView.getBottom()) { switch (ev.getAction()) { case MotionEvent.ACTION_DOWN: mTouchTarget = getTouchTarget(mHeaderView, x, y); mActionDownHappened = true; break; case MotionEvent.ACTION_MOVE: break; case MotionEvent.ACTION_UP: View touchTarget = getTouchTarget(mHeaderView, x, y); if (touchTarget == mTouchTarget && mTouchTarget.isClickable()) { mTouchTarget.performClick(); invalidate(new Rect(0, 0, mHeaderWidth, mHeaderHeight)); } else if (mIsHeaderGroupClickable) { int groupPosition = getPackedPositionGroup(getExpandableListPosition(pos)); if (groupPosition != INVALID_POSITION && mActionDownHappened) { if (isGroupExpanded(groupPosition)) { collapseGroup(groupPosition); } else { expandGroup(groupPosition); } } } mActionDownHappened = false; break; } return true; } return super.dispatchTouchEvent(ev); } private int p = 0; private View getTouchTarget(View view, int x, int y) { if (!(view instanceof ViewGroup)) { return view; } ViewGroup parent = (ViewGroup) view; int childrenCount = parent.getChildCount(); final boolean customOrder = isChildrenDrawingOrderEnabled(); View target = null; for (int i = childrenCount - 1; i >= 0; i--) { final int childIndex = customOrder ? getChildDrawingOrder(childrenCount, i) : i; final View child = parent.getChildAt(childIndex); if (isTouchPointInView(child, x, y)) { target = child; break; } } if (target == null) { target = parent; } return target; } private boolean isTouchPointInView(View view, int x, int y) { if (y >= view.getTop() && y <= view.getBottom() && x >= view.getLeft() && x <= view.getRight()) { return true; } return false; } public void requestRefreshHeader() { refreshHeader(); invalidate(new Rect(0, 0, mHeaderWidth, mHeaderHeight)); } protected void refreshHeader() { if (mHeaderView == null) { return; } int firstVisiblePos = getFirstVisiblePosition(); int pos = firstVisiblePos + 1; int firstVisibleGroupPos = getPackedPositionGroup(getExpandableListPosition(firstVisiblePos)); int group = getPackedPositionGroup(getExpandableListPosition(pos)); if (group == firstVisibleGroupPos + 1) { View view = getChildAt(1); if (view == null) { LogUtil.E(TAG, "Warning : refreshHeader getChildAt(1)=null"); return; } if (view.getTop() <= mHeaderHeight) { int delta = mHeaderHeight - view.getTop(); mHeaderView.layout(0, -delta, mHeaderWidth, mHeaderHeight - delta); } else { //TODO : note it, when cause bug, remove it mHeaderView.layout(0, 0, mHeaderWidth, mHeaderHeight); } } else { mHeaderView.layout(0, 0, mHeaderWidth, mHeaderHeight); } if (mHeaderUpdateListener != null) { mHeaderUpdateListener.updatePinnedHeader(mHeaderView, firstVisibleGroupPos); } } @Override public void onScrollStateChanged(AbsListView view, int scrollState) { if (mScrollListener != null) { mScrollListener.onScrollStateChanged(view, scrollState); } } @Override public void onScroll(AbsListView view, int firstVisibleItem, int visibleItemCount, int totalItemCount) { if (totalItemCount > 0) { refreshHeader(); } if (mScrollListener != null) { mScrollListener.onScroll(view, firstVisibleItem, visibleItemCount, totalItemCount); } } @Override public void onViewAdded(View child) { super.onViewAdded(child); refreshHeader(); } @Override public void onViewRemoved(View child) { super.onViewRemoved(child); refreshHeader(); } private View headview; @Override public void addHeaderView(View v) { this.headview = v; super.addHeaderView(v); } @Override public void addHeaderView(View v, Object data, boolean isSelectable) { this.headview = v; super.addHeaderView(v, data, isSelectable); } public View getHeadview() { return headview; } public void setOnHeadViewClick(OnItemClickListener onHeadViewClick) { this.onHeadViewClick = onHeadViewClick; } }