Android UI开发第十六篇——分享一个popuwindow实例
PopupWindow在android.widget包下，弹出窗口的形式展示。官方文档对该控件的描述是：“一个弹出窗口控件，可以用来显示任意视图(View)，而且会浮动在当前 活动(activity)的顶部”。PopupWindow可以让我们实现多种自定义控件，例如：menu、alertdialog等弹窗似的View。 实现中使用的PopupWindow。这里做了简单封装，其中有三个类组成：PopuItem、PopuJar、PopupWindows。 publicclassPopuItem{ privateDrawableicon; privateBitmapthumb; privateStringtitle; privateintactionId=-1; privatebooleanselected; privatebooleansticky; /** *Constructor * *@paramactionIdActionidforcasestatements *@paramtitleTitle *@paramiconIcontouse */ publicPopuItem(intactionId,Stringtitle,Drawableicon){ this.title=title; this.icon=icon; this.actionId=actionId; } /** *Constructor */ publicPopuItem(){ this(-1,null,null); } /** *Constructor * *@paramactionIdActionidoftheitem *@paramtitleTexttoshowfortheitem */ publicPopuItem(intactionId,Stringtitle){ this(actionId,title,null); } /** *Constructor * *@paramicon{@linkDrawable}actionicon */ publicPopuItem(Drawableicon){ this(-1,null,icon); } /** *Constructor * *@paramactionIdActionIDofitem *@paramicon{@linkDrawable}actionicon */ publicPopuItem(intactionId,Drawableicon){ this(actionId,null,icon); } /** *Setactiontitle * *@paramtitleactiontitle */ publicvoidsetTitle(Stringtitle){ this.title=title; } /** *Getactiontitle * *@returnactiontitle */ publicStringgetTitle(){ returnthis.title; } /** *Setactionicon * *@paramicon{@linkDrawable}actionicon */ publicvoidsetIcon(Drawableicon){ this.icon=icon; } /** *Getactionicon *@return{@linkDrawable}actionicon */ publicDrawablegetIcon(){ returnthis.icon; } /** *Setactionid * *@paramactionIdActionidforthisaction */ publicvoidsetActionId(intactionId){ this.actionId=actionId; } /** *@returnOuractionid */ publicintgetActionId(){ returnactionId; } /** *Setstickystatusofbutton * *@paramstickytrueforsticky,popupsendseventbutdoesnotdisappear */ publicvoidsetSticky(booleansticky){ this.sticky=sticky; } /** *@returntrueifbuttonissticky,menustaysvisibleafterpress */ publicbooleanisSticky(){ returnsticky; } /** *Setselectedflag; * *@paramselectedFlagtoindicatetheitemisselected */ publicvoidsetSelected(booleanselected){ this.selected=selected; } /** *Checkifitemisselected * *@returntrueorfalse */ publicbooleanisSelected(){ returnthis.selected; } /** *Setthumb * *@paramthumbThumbimage */ publicvoidsetThumb(Bitmapthumb){ this.thumb=thumb; } /** *Getthumbimage * *@returnThumbimage */ publicBitmapgetThumb(){ returnthis.thumb; } } public class PopuJar extends PopupWindows implements OnDismissListener { private View mRootView; private ImageView mArrowUp; private ImageView mArrowDown; private LayoutInflater mInflater; private ViewGroup mTrack; private ScrollView mScroller; private OnPopuItemClickListener mItemClickListener; private OnDismissListener mDismissListener; private List<PopuItem> PopuItems = new ArrayList<PopuItem>(); private boolean mDidAction; private int mChildPos; private int mInsertPos; private int mAnimStyle; private int mOrientation; private int rootWidth=0; public static final int HORIZONTAL = 0; public static final int VERTICAL = 1; public static final int ANIM_GROW_FROM_LEFT = 1; public static final int ANIM_GROW_FROM_RIGHT = 2; public static final int ANIM_GROW_FROM_CENTER = 3; public static final int ANIM_REFLECT = 4; public static final int ANIM_AUTO = 5; /** * Constructor for default vertical layout * * @param context Context */ public PopuJar(Context context) { this(context, VERTICAL); } /** * Constructor allowing orientation override * * @param context Context * @param orientation Layout orientation, can be vartical or horizontal */ public PopuJar(Context context, int orientation) { super(context); mOrientation = orientation; mInflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE); if (mOrientation == HORIZONTAL) { setRootViewId(R.layout.popup_horizontal); } else { setRootViewId(R.layout.popup_vertical); } mAnimStyle = ANIM_AUTO; mChildPos = 0; } /** * Get action item at an index * * @param index Index of item (position from callback) * * @return Action Item at the position */ public PopuItem getPopuItem(int index) { return PopuItems.get(index); } /** * Set root view. * * @param id Layout resource id */ public void setRootViewId(int id) { mRootView = (ViewGroup) mInflater.inflate(id, null); mTrack = (ViewGroup) mRootView.findViewById(R.id.tracks); mArrowDown = (ImageView) mRootView.findViewById(R.id.arrow_down); mArrowUp = (ImageView) mRootView.findViewById(R.id.arrow_up); mScroller = (ScrollView) mRootView.findViewById(R.id.scroller); //This was previously defined on show() method, moved here to prevent force close that occured //when tapping fastly on a view to show quickaction dialog. //Thanx to zammbi (github.com/zammbi) mRootView.setLayoutParams(new LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT)); setContentView(mRootView); } /** * Set animation style * * @param mAnimStyle animation style, default is set to ANIM_AUTO */ public void setAnimStyle(int mAnimStyle) { this.mAnimStyle = mAnimStyle; } /** * Set listener for action item clicked. * * @param listener Listener */ public void setOnPopuItemClickListener(OnPopuItemClickListener listener) { mItemClickListener = listener; } /** * Add action item * * @param action {@link PopuItem} */ public void addPopuItem(PopuItem action) { PopuItems.add(action); String title = action.getTitle(); Drawable icon = action.getIcon(); View container; if (mOrientation == HORIZONTAL) { container = mInflater.inflate(R.layout.action_item_horizontal, null); } else { container = mInflater.inflate(R.layout.action_item_vertical, null); } ImageView img = (ImageView) container.findViewById(R.id.iv_icon); TextView text = (TextView) container.findViewById(R.id.tv_title); if (icon != null) { img.setImageDrawable(icon); } else { img.setVisibility(View.GONE); } if (title != null) { text.setText(title); } else { text.setVisibility(View.GONE); } final int pos = mChildPos; final int actionId = action.getActionId(); container.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { if (mItemClickListener != null) { mItemClickListener.onItemClick(PopuJar.this, pos, actionId); } if (!getPopuItem(pos).isSticky()) { mDidAction = true; dismiss(); } } }); container.setFocusable(true); container.setClickable(true); if (mOrientation == HORIZONTAL && mChildPos != 0) { View separator = mInflater.inflate(R.layout.horiz_separator, null); RelativeLayout.LayoutParams params = new RelativeLayout.LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.FILL_PARENT); separator.setLayoutParams(params); separator.setPadding(5, 0, 5, 0); mTrack.addView(separator, mInsertPos); mInsertPos++; } mTrack.addView(container, mInsertPos); mChildPos++; mInsertPos++; } /** * Show quickaction popup. Popup is automatically positioned, on top or bottom of anchor view. * */ public void show (View anchor) { preShow(); int xPos, yPos, arrowPos; mDidAction = false; int[] location = new int[2]; anchor.getLocationOnScreen(location); Rect anchorRect = new Rect(location[0], location[1], location[0] + anchor.getWidth(), location[1] + anchor.getHeight()); //mRootView.setLayoutParams(new LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT)); mRootView.measure(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT); int rootHeight = mRootView.getMeasuredHeight(); if (rootWidth == 0) { rootWidth = mRootView.getMeasuredWidth(); } int screenWidth = mWindowManager.getDefaultDisplay().getWidth(); int screenHeight = mWindowManager.getDefaultDisplay().getHeight(); //automatically get X coord of popup (top left) if ((anchorRect.left + rootWidth) > screenWidth) { xPos = anchorRect.left - (rootWidth-anchor.getWidth()); xPos = (xPos < 0) ? 0 : xPos; arrowPos = anchorRect.centerX()-xPos; } else { if (anchor.getWidth() > rootWidth) { xPos = anchorRect.centerX() - (rootWidth/2); } else { xPos = anchorRect.left; } arrowPos = anchorRect.centerX()-xPos; } int dyTop = anchorRect.top; int dyBottom = screenHeight - anchorRect.bottom; boolean onTop = (dyTop > dyBottom) ? true : false; if (onTop) { if (rootHeight > dyTop) { yPos = 15; LayoutParams l = mScroller.getLayoutParams(); l.height = dyTop - anchor.getHeight(); } else { yPos = anchorRect.top - rootHeight; } } else { yPos = anchorRect.bottom; if (rootHeight > dyBottom) { LayoutParams l = mScroller.getLayoutParams(); l.height = dyBottom; } } showArrow(((onTop) ? R.id.arrow_down : R.id.arrow_up), arrowPos); setAnimationStyle(screenWidth, anchorRect.centerX(), onTop); mWindow.showAtLocation(anchor, Gravity.NO_GRAVITY, xPos, yPos); } /** * Set animation style * * @param screenWidth screen width * @param requestedX distance from left edge * @param onTop flag to indicate where the popup should be displayed. Set TRUE if displayed on top of anchor view * and vice versa */ private void setAnimationStyle(int screenWidth, int requestedX, boolean onTop) { int arrowPos = requestedX - mArrowUp.getMeasuredWidth()/2; switch (mAnimStyle) { case ANIM_GROW_FROM_LEFT: mWindow.setAnimationStyle((onTop) ? R.style.Animations_PopUpMenu_Left : R.style.Animations_PopDownMenu_Left); break; case ANIM_GROW_FROM_RIGHT: mWindow.setAnimationStyle((onTop) ? R.style.Animations_PopUpMenu_Right : R.style.Animations_PopDownMenu_Right); break; case ANIM_GROW_FROM_CENTER: mWindow.setAnimationStyle((onTop) ? R.style.Animations_PopUpMenu_Center : R.style.Animations_PopDownMenu_Center); break; case ANIM_REFLECT: mWindow.setAnimationStyle((onTop) ? R.style.Animations_PopUpMenu_Reflect : R.style.Animations_PopDownMenu_Reflect); break; case ANIM_AUTO: if (arrowPos <= screenWidth/4) { mWindow.setAnimationStyle((onTop) ? R.style.Animations_PopUpMenu_Left : R.style.Animations_PopDownMenu_Left); } else if (arrowPos > screenWidth/4 && arrowPos < 3 * (screenWidth/4)) { mWindow.setAnimationStyle((onTop) ? R.style.Animations_PopUpMenu_Center : R.style.Animations_PopDownMenu_Center); } else { mWindow.setAnimationStyle((onTop) ? R.style.Animations_PopUpMenu_Right : R.style.Animations_PopDownMenu_Right); } break; } } /** * Show arrow * * @param whichArrow arrow type resource id * @param requestedX distance from left screen */ private void showArrow(int whichArrow, int requestedX) { final View showArrow = (whichArrow == R.id.arrow_up) ? mArrowUp : mArrowDown; final View hideArrow = (whichArrow == R.id.arrow_up) ? mArrowDown : mArrowUp; final int arrowWidth = mArrowUp.getMeasuredWidth(); showArrow.setVisibility(View.VISIBLE); ViewGroup.MarginLayoutParams param = (ViewGroup.MarginLayoutParams)showArrow.getLayoutParams(); param.leftMargin = requestedX - arrowWidth / 2; hideArrow.setVisibility(View.INVISIBLE); } /** * Set listener for window dismissed. This listener will only be fired if the quicakction dialog is dismissed * by clicking outside the dialog or clicking on sticky item. */ public void setOnDismissListener(PopuJar.OnDismissListener listener) { setOnDismissListener(this); mDismissListener = listener; } @Override public void onDismiss() { if (!mDidAction && mDismissListener != null) { mDismissListener.onDismiss(); } } /** * Listener for item click * */ public interface OnPopuItemClickListener { public abstract void onItemClick(PopuJar source, int pos, int actionId); } /** * Listener for window dismiss * */ public interface OnDismissListener { public abstract void onDismiss(); } } public class PopupWindows { protected Context mContext; protected PopupWindow mWindow; protected View mRootView; protected Drawable mBackground = null; protected WindowManager mWindowManager; /** * Constructor. * * @param context Context */ public PopupWindows(Context context) { mContext = context; mWindow = new PopupWindow(context); mWindow.setTouchInterceptor(new OnTouchListener() { @Override public boolean onTouch(View v, MotionEvent event) { if (event.getAction() == MotionEvent.ACTION_OUTSIDE) { mWindow.dismiss(); return true; } return false; } }); mWindowManager = (WindowManager) context.getSystemService(Context.WINDOW_SERVICE); } /** * On dismiss */ protected void onDismiss() { } /** * On show */ protected void onShow() { } /** * On pre show */ protected void preShow() { if (mRootView == null) throw new IllegalStateException("setContentView was not called with a view to display."); onShow(); if (mBackground == null) mWindow.setBackgroundDrawable(new BitmapDrawable()); else mWindow.setBackgroundDrawable(mBackground); mWindow.setWidth(WindowManager.LayoutParams.WRAP_CONTENT); mWindow.setHeight(WindowManager.LayoutParams.WRAP_CONTENT); mWindow.setTouchable(true); mWindow.setFocusable(true); mWindow.setOutsideTouchable(true); mWindow.setContentView(mRootView); } /** * Set background drawable. * * @param background Background drawable */ public void setBackgroundDrawable(Drawable background) { mBackground = background; } /** * Set content view. * * @param root Root view */ public void setContentView(View root) { mRootView = root; mWindow.setContentView(root); } /** * Set content view. * * @param layoutResID Resource id */ public void setContentView(int layoutResID) { LayoutInflater inflator = (LayoutInflater) mContext.getSystemService(Context.LAYOUT_INFLATER_SERVICE); setContentView(inflator.inflate(layoutResID, null)); } /** * Set listener on window dismissed. * * @param listener */ public void setOnDismissListener(PopupWindow.OnDismissListener listener) { mWindow.setOnDismissListener(listener); } /** * Dismiss the popup window. */ public void dismiss() { mWindow.dismiss(); } } 显示popu： 参考： http://code.google.com/p/simple-quickactions/ 本文转自xyz_lmn51CTO博客，原文链接：http://blog.51cto.com/xyzlmn/817276，如需转载请自行联系原作者
