Android DropDownMenu下拉菜单

package com.hyg.dropdownmenu; import android.content.Context; import android.content.res.TypedArray; import android.support.annotation.NonNull; import android.text.TextUtils; import android.util.AttributeSet; import android.util.DisplayMetrics; import android.util.TypedValue; import android.view.Gravity; import android.view.View; import android.view.ViewGroup; import android.view.animation.AnimationUtils; import android.widget.FrameLayout; import android.widget.LinearLayout; import android.widget.RelativeLayout; import android.widget.TextView; import java.util.List; /** * 使用时，在这个布局最外层的view添加android:layout_below="@id/dropDownMenu_underLine"这一行代码。 * Created by HuangYuGuang on 2016/4/14. */ public class DropDownMenu extends RelativeLayout { //底层参照物控件，作为其他控件布局时候的相对参照 private LinearLayout tabMenuViewButtom; //顶部菜单布局 private LinearLayout tabMenuView; //底部容器，包含popupMenuViews，maskView private View 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; //菜单背景色 private int menuBackgroundColor = 0xffffffff; //菜单下面的分割线颜色 private int underlineColor = 0xffcccccc; //菜单的箭头是否靠右边 private boolean menuIconToRight = false; public DropDownMenu(Context context) { super(context, null); } public DropDownMenu(Context context, AttributeSet attrs) { this(context, attrs, 0); } public DropDownMenu(Context context, AttributeSet attrs, int defStyleAttr) { super(context, attrs, defStyleAttr); //为DropDownMenu添加自定义属性 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); menuIconToRight = a.getBoolean(R.styleable.DropDownMenu_ddmenuIconToRight, menuIconToRight); a.recycle(); //初始化tabMenuView并添加到tabMenuView的参照物 tabMenuViewButtom = new LinearLayout(context); tabMenuViewButtom.setId(R.id.dropDownMenu_tabMenuView); LayoutParams params = new LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.WRAP_CONTENT); addView(tabMenuViewButtom,0); //为tabMenuView添加下划线 View underLine = new View(getContext()); underLine.setId(R.id.dropDownMenu_underLine); LayoutParams lp = new LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, 1); lp.addRule(RelativeLayout.BELOW, R.id.dropDownMenu_tabMenuView); underLine.setLayoutParams(lp); underLine.setBackgroundColor(underlineColor); addView(underLine, 1); } /** * 初始化DropDownMenu * * @param tabTexts * @param popupViews */ public void setDropDownMenu(@NonNull List<String> tabTexts, @NonNull List<View> popupViews) { if (tabTexts.size() != popupViews.size()) { throw new IllegalArgumentException("params not match, tabTexts.size() should be equal popupViews.size()"); } LayoutParams plp = new LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT); plp.addRule(RelativeLayout.BELOW, R.id.dropDownMenu_underLine); maskView = new View(getContext()); maskView.setLayoutParams(new FrameLayout.LayoutParams(FrameLayout.LayoutParams.MATCH_PARENT, FrameLayout.LayoutParams.MATCH_PARENT)); maskView.setBackgroundColor(maskColor); maskView.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { closeMenu(); } }); maskView.setVisibility(GONE); maskView.setLayoutParams(plp); addView(maskView); popupMenuViews = new FrameLayout(getContext()); popupMenuViews.setVisibility(GONE); popupMenuViews.setLayoutParams(plp); addView(popupMenuViews); 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); } //初始化tabMenuView并添加到tabMenuView，为了能tabMenuView使位于顶层，所以最后添加tabMenuView tabMenuView = new LinearLayout(getContext()); tabMenuView.setId(R.id.dropDownMenu_tabMenuView); LayoutParams params = new LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.WRAP_CONTENT); tabMenuView.setOrientation(LinearLayout.HORIZONTAL); tabMenuView.setBackgroundColor(menuBackgroundColor); tabMenuView.setLayoutParams(params); addView(tabMenuView); for (int i = 0; i < tabTexts.size(); i++) { addTab(tabTexts, i); } //为了使tabMenuViewButtom和tabMenuView的高度一样 LayoutParams tparams = new LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT,tabMenuView.getHeight()); tabMenuViewButtom.setLayoutParams(tparams); } private void addTab(@NonNull List<String> tabTexts, int i) { final TextView tab = new TextView(getContext()); LinearLayout menuItenmView = new LinearLayout(getContext()); menuItenmView.setLayoutParams(new LinearLayout.LayoutParams(0, ViewGroup.LayoutParams.WRAP_CONTENT, 1.0f)); menuItenmView.setGravity(Gravity.CENTER); menuItenmView.setOrientation(LinearLayout.HORIZONTAL); tab.setSingleLine(); tab.setEllipsize(TextUtils.TruncateAt.END); tab.setGravity(Gravity.CENTER); tab.setTextSize(TypedValue.COMPLEX_UNIT_PX, menuTextSize); if(menuIconToRight) tab.setLayoutParams(new LinearLayout.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.WRAP_CONTENT)); else tab.setLayoutParams(new LinearLayout.LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT)); tab.setTextColor(textUnselectedColor); tab.setCompoundDrawablesWithIntrinsicBounds(null, null, getResources().getDrawable(menuUnselectedIcon), null); tab.setText(tabTexts.get(i) + " "); tab.setPa