仿美团、爱奇艺电影票下拉筛选框
转自github /dongjunkun/DropDownMenu 权当笔记记录，感谢作者分享 作者简书地址 简书
效果图
主要代码
` 1、定义属性
//顶部菜单布局
private LinearLayout tabMenuView;
//底部容器，包含popupMenuViews，maskView
private FrameLayout containerView;
//弹出菜单父布局
private FrameLayout popupMenuViews;
//遮罩半透明View，点击可关闭DropDownMenu
private View maskView;
//tabMenuView里面选中的tab位置，-1表示未选中
private int current_tab_position = -1;
//分割线颜色
private int dividerColor = 0xffcccccc;
//tab选中颜色
private int textSelectedColor = 0xff890c85;
//tab未选中颜色
private int textUnselectedColor = 0xff111111;
//遮罩颜色
private int maskColor = 0x88888888;
//tab字体大小
private int menuTextSize = 14;
//tab选中图标
private int menuSelectedIcon;
//tab未选中图标
private int menuUnselectedIcon;`
2、初始化
public DropDownMenu(Context context, AttributeSet attrs, int defStyleAttr) {super(context, attrs, defStyleAttr);setOrientation(VERTICAL);//为DropDownMenu添加自定义属性int menuBackgroundColor = 0xffffffff;int underlineColor = 0xffcccccc;TypedArray a = context.obtainStyledAttributes(attrs, R.styleable.DropDownMenu);underlineColor = a.getColor(R.styleable.DropDownMenu_ddunderlineColor, underlineColor);dividerColor = a.getColor(R.styleable.DropDownMenu_dddividerColor, dividerColor);textSelectedColor = a.getColor(R.styleable.DropDownMenu_ddtextSelectedColor, textSelectedColor);textUnselectedColor = a.getColor(R.styleable.DropDownMenu_ddtextUnselectedColor, textUnselectedColor);menuBackgroundColor = a.getColor(R.styleable.DropDownMenu_ddmenuBackgroundColor, menuBackgroundColor);maskColor = a.getColor(R.styleable.DropDownMenu_ddmaskColor, maskColor);menuTextSize = a.getDimensionPixelSize(R.styleable.DropDownMenu_ddmenuTextSize, menuTextSize);menuSelectedIcon = a.getResourceId(R.styleable.DropDownMenu_ddmenuSelectedIcon, menuSelectedIcon);menuUnselectedIcon = a.getResourceId(R.styleable.DropDownMenu_ddmenuUnselectedIcon, menuUnselectedIcon);a.recycle();//初始化tabMenuView并添加到tabMenuViewtabMenuView = new LinearLayout(context);LayoutParams params = new LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.WRAP_CONTENT);tabMenuView.setOrientation(HORIZONTAL);tabMenuView.setBackgroundColor(menuBackgroundColor);tabMenuView.setLayoutParams(params);addView(tabMenuView, 0);//为tabMenuView添加下划线View underLine = new View(getContext());underLine.setLayoutParams(new LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, dpTpPx(1.0f)));underLine.setBackgroundColor(underlineColor);addView(underLine, 1);//初始化containerView并将其添加到DropDownMenucontainerView = new FrameLayout(context);containerView.setLayoutParams(new FrameLayout.LayoutParams(FrameLayout.LayoutParams.MATCH_PARENT, FrameLayout.LayoutParams.MATCH_PARENT));addView(containerView, 2);}
3、设置dropmenu
public void setDropDownMenu(@NonNull List<String> tabTexts, @NonNull List<View> popupViews, @NonNull View contentView) {if (tabTexts.size() != popupViews.size()) {throw new IllegalArgumentException("params not match, tabTexts.size() should be equal popupViews.size()");}for (int i = 0; i < tabTexts.size(); i++) {addTab(tabTexts, i);}containerView.addView(contentView, 0);maskView = new View(getContext());maskView.setLayoutParams(new FrameLayout.LayoutParams(FrameLayout.LayoutParams.MATCH_PARENT, FrameLayout.LayoutParams.MATCH_PARENT));maskView.setBackgroundColor(maskColor);maskView.setOnClickListener(new OnClickListener() {@Overridepublic void onClick(View v) {closeMenu();}});containerView.addView(maskView, 1);maskView.setVisibility(GONE);popupMenuViews = new FrameLayout(getContext());popupMenuViews.setVisibility(GONE);containerView.addView(popupMenuViews, 2);for (int i = 0; i < popupViews.size(); i++) {popupViews.get(i).setLayoutParams(new ViewGroup.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.WRAP_CONTENT));popupMenuViews.addView(popupViews.get(i), i);}}
4、添加tab
private void addTab(@NonNull List<String> tabTexts, int i) {final TextView tab = new TextView(getContext());tab.setSingleLine();tab.setEllipsize(TextUtils.TruncateAt.END);tab.setGravity(Gravity.CENTER);tab.setTextSize(PLEX_UNIT_PX,menuTextSize);tab.setLayoutParams(new LayoutParams(0, ViewGroup.LayoutParams.WRAP_CONTENT, 1.0f));tab.setTextColor(textUnselectedColor);tab.setCompoundDrawablesWithIntrinsicBounds(null, null, getResources().getDrawable(menuUnselectedIcon), null);tab.setText(tabTexts.get(i));tab.setPadding(dpTpPx(5), dpTpPx(12), dpTpPx(5), dpTpPx(12));//添加点击事件tab.setOnClickListener(new OnClickListener() {@Overridepublic void onClick(View v) {switchMenu(tab);}});tabMenuView.addView(tab);//添加分割线if (i < tabTexts.size() - 1) {View view = new View(getContext());view.setLayoutParams(new LayoutParams(dpTpPx(0.5f), ViewGroup.LayoutParams.MATCH_PARENT));view.setBackgroundColor(dividerColor);tabMenuView.addView(view);}}
5、设置Tab文字
/*** 改变tab文字** @param text*/public void setTabText(String text) {if (current_tab_position != -1) {((TextView) tabMenuView.getChildAt(current_tab_position)).setText(text);}}
5、关闭和选择
public void setTabClickable(boolean clickable) {for (int i = 0; i < tabMenuView.getChildCount(); i = i + 2) {tabMenuView.getChildAt(i).setClickable(clickable);}}/*** 关闭菜单*/public void closeMenu() {if (current_tab_position != -1) {((TextView) tabMenuView.getChildAt(current_tab_position)).setTextColor(textUnselectedColor);((TextView) tabMenuView.getChildAt(current_tab_position)).setCompoundDrawablesWithIntrinsicBounds(null, null,getResources().getDrawable(menuUnselectedIcon), null);popupMenuViews.setVisibility(View.GONE);popupMenuViews.setAnimation(AnimationUtils.loadAnimation(getContext(), R.anim.dd_menu_out));maskView.setVisibility(GONE);maskView.setAnimation(AnimationUtils.loadAnimation(getContext(), R.anim.dd_mask_out));current_tab_position = -1;}}/*** DropDownMenu是否处于可见状态** @return*/public boolean isShowing() {return current_tab_position != -1;}/*** 切换菜单** @param target*/private void switchMenu(View target) {System.out.println(current_tab_position);for (int i = 0; i < tabMenuView.getChildCount(); i = i + 2) {if (target == tabMenuView.getChildAt(i)) {if (current_tab_position == i) {closeMenu();} else {if (current_tab_position == -1) {popupMenuViews.setVisibility(View.VISIBLE);popupMenuViews.setAnimation(AnimationUtils.loadAnimation(getContext(), R.anim.dd_menu_in));maskView.setVisibility(VISIBLE);maskView.setAnimation(AnimationUtils.loadAnimation(getContext(), R.anim.dd_mask_in));popupMenuViews.getChildAt(i / 2).setVisibility(View.VISIBLE);} else {popupMenuViews.getChildAt(i / 2).setVisibility(View.VISIBLE);}current_tab_position = i;((TextView) tabMenuView.getChildAt(i)).setTextColor(textSelectedColor);((TextView) tabMenuView.getChildAt(i)).setCompoundDrawablesWithIntrinsicBounds(null, null,getResources().getDrawable(menuSelectedIcon), null);}} else {((TextView) tabMenuView.getChildAt(i)).setTextColor(textUnselectedColor);((TextView) tabMenuView.getChildAt(i)).setCompoundDrawablesWithIntrinsicBounds(null, null,getResources().getDrawable(menuUnselectedIcon), null);popupMenuViews.getChildAt(i / 2).setVisibility(View.GONE);}}}public int dpTpPx(float value) {DisplayMetrics dm = getResources().getDisplayMetrics();return (int) (TypedValue.applyDimension(PLEX_UNIT_DIP, value, dm) + 0.5);}
定义style属性
<declare-styleable name="DropDownMenu"><attr name="ddunderlineColor" format="color"/><attr name="dddividerColor" format="color"/><attr name="ddtextSelectedColor" format="color"/><attr name="ddtextUnselectedColor" format="color"/><attr name="ddmenuBackgroundColor" format="color"/><attr name="ddmaskColor" format="color"/><attr name="ddmenuTextSize" format="dimension"/><attr name="ddmenuSelectedIcon" format="reference"/><attr name="ddmenuUnselectedIcon" format="reference"/></declare-styleable>
