因为网上很多SideBar写的是死亡的26个字符，所以不能根据名称动态显示。 自己更改，共享以供参考：
导入安卓. content.context； import android.graphics.Canvas； import android.graphics.Color； 导入安卓. graphics.paint； import android.graphics.Rect； import Android.graphics.typeface； 导入安卓. graphics.drawable.color drawable； import Android.util.attributes et； 导入安卓. view.motion event； 导入安卓. view.view； import Android .构件. textview； import com.qmuiteam.qmui.util.qmuidisplayhelper； import java.util.ArrayList； import java.util.Collections； import java.util.List； publicclasssidebarextendsview//触摸事件privateontouchingletterchangedlistenerontouchingletterchangedlistener； //26个字符的private String[] b={}； 私密int choose=-1； 检查隐私绘制点=新绘制点(； 隐私上下文m上下文； 隐私文本诊断程序； 私有浮动中心； 私密浮动项目高度； 私有列表tfloatlistheight=new ArrayList (； /jpdymjpdymjpdymsidebar显示字符的textviewjpdym @ parammtextdialogjpdym/publicvoidsettextview { textviewmtextdialog } { this } AttributeSet attrs，int defStyle ) super ) context，attrs，defStyle )； this.mContext=context； centery=qmuidisplayhelper.get screen height (m context )/2； itemHeight=centerY/27； }公共sidebar (xsd zxc，AttributeSet attrs ) (super ) context，attrs )； this.mContext=context； centery=qmuidisplayhelper.get screen height (m context )/2； itemHeight=centerY/27； }公共sidebar (xsd zxc ) super )上下文； this.mContext=context； centery=qmuidisplayhelper.get screen height (m context )/2； itemHeight=centerY/27； }私密int total height=0； 私密int textheight=0； /jpdymjpdym jpdym重写这一方的kkdsn/protectedvoidondraw (canvas canvas ) super.ondraw (canvas )。 if(b.length0) if ) Textheight=0) { Rect rect=new Rect； paint.gettextbounds(b[0]，0，b[0].length )，rect )； textHeight=rect.height (； (} int width=getWidth )； //获取对应的宽度int center=b.length/2； setcentertext(canv
as, center, width, centerY); if (center > 0) { for (int i = center - 1; i >= 0; i--) { setCenterText(canvas, i, width, centerY - (center - i) jpdym 20 - itemHeight jpdym (center - i)); } for (int i = center + 1; i < b.length; i++) { setCenterText(canvas, i, width, centerY + (i - center) jpdym 20 + itemHeight jpdym (i - center)); } } Collections.sort(listHeight); totalHeight = (int) ((listHeight.get(listHeight.size() - 1)) - listHeight.get(0)); } } private void setCenterText(Canvas canvas, int i, int width, float yPos2) { paint.setColor(Color.parseColor("#666666")); paint.setTypeface(Typeface.DEFAULT); paint.setAntiAlias(true); paint.setTextSize(30); // 选中的状态 if (i == choose) { paint.setColor(Color.parseColor("#fc280c")); paint.setFakeBoldText(true); } // x坐标等于中间-字符串宽度的一半. float xPos1 = width / 2 - paint.measureText(b[i]) / 2; canvas.drawText(b[i], xPos1, yPos2, paint); if (!listHeight.contains(yPos2)) { listHeight.add(yPos2); } paint.reset();// 重置画笔 } @Override public boolean dispatchTouchEvent(MotionEvent event) { final int action = event.getAction(); final float y = event.getY();// 点击y坐标 final int oldChoose = choose; final OnTouchingLetterChangedListener listener = onTouchingLetterChangedListener; final int c = (int) ((y - listHeight.get(0)) / totalHeight jpdym b.length); switch (action) { case MotionEvent.ACTION_UP: setBackgroundDrawable(new ColorDrawable(0x00000000)); choose = -1;// invalidate(); if (mTextDialog != null) { mTextDialog.setVisibility(View.INVISIBLE); } break; default: // setBackgroundResource(R.drawable.sidebar_background); if (oldChoose != c) { if (c >= 0 && c < b.length) { if (listener != null) { listener.onTouchingLetterChanged(b[c]); } if (mTextDialog != null) { mTextDialog.setText(b[c]); mTextDialog.setVisibility(View.VISIBLE); } choose = c; invalidate(); } } break; } return true; } /jpdymjpdym jpdym 向外公开的方kkdsn jpdym @param onTouchingLetterChangedListener jpdym/ public void setOnTouchingLetterChangedListener( OnTouchingLetterChangedListener onTouchingLetterChangedListener) { this.onTouchingLetterChangedListener = onTouchingLetterChangedListener; } public void setData(String[] b) { this.b = b; invalidate(); } /jpdymjpdym jpdym 接口 jpdym jpdym @author coder jpdym/ public interface OnTouchingLetterChangedListener { public void onTouchingLetterChanged(String s); }}使用高挑的康乃馨
//重写BaseQuickAdapter中的setList（）高挑的康乃馨 override fun setList(list: Collection<ContactsBean>?) { val contactsList = list as MutableList<ContactsBean> Collections.sort(contactsList, PinyinContactsComparator()) if (null != slideBar && !contactsList.isNullOrEmpty()) { val tempList = mutableListOf<String>() for (bean in contactsList) { val sortStr = CharacterParser.getInstance().getSelling(bean.contactsName).substring(0, 1) .toUpperCase() if (!tempList.contains(sortStr)) { tempList.add(sortStr) } } //不加星号也可 tempList.add("#") slideBar.setData(tempList.toTypedArray()) } super.setList(contactsList) }