Android仿QQ微信未读消息小红点BadgeHelper
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2022-06-23 23:37:34
android 小红点 未读消息功能 badgehelper因为最近的项目需求,翻遍github上的未读消息红点开源库, 发现大部分不能适配不同情况的布局, 所以我写了一个能兼容全部的 !网上的写法是...
android 小红点 未读消息功能 badgehelper
因为最近的项目需求,翻遍github上的未读消息红点开源库, 发现大部分
不能适配不同情况的布局, 所以我写了一个能兼容全部的 !
网上的写法是 继承textview然后生成一个小红点drawable,设置到背景中去, 然后把目标view外层加一层framelayout,然后把小红点添加进去
但这样做的问题来了, 小红点与目标view 会叠起来!, 挡住文字,!!! 看得我瞎了~~~ 而且 他们提供的setoffsetx setpadding 之类的没卵用,你如果想要偏移小红点让它不与下面的view重叠,那是不可能的
所以我的写法是 为了更好的性能,直接继承view然后画小红点背景, 然后把目标view外层加一层linearlayout 让小红点view放目标的右边,这样就不会重叠
同时 我也支持设置 重叠模式和非重叠模式
这是效果图
由于github账号出问题了,没法上传, 所以写到博客上算了
这只是一个小工具类 供大家学习下我的思路, 就不多说了, 具体实现注释里写的很清楚,不太清楚的可以回复问我
#核心类:
##badgehelper .java
package com.truescend.gofit.views; import android.content.context; import android.content.res.resources; import android.graphics.canvas; import android.graphics.paint; import android.graphics.rect; import android.graphics.rectf; import android.support.annotation.intdef; import android.support.design.widget.tablayout; import android.util.log; import android.util.typedvalue; import android.view.gravity; import android.view.view; import android.view.viewgroup; import android.widget.framelayout; import android.widget.linearlayout; import java.lang.annotation.retention; import java.lang.annotation.retentionpolicy; import java.lang.reflect.field; /** * 作者:东芝(2018/8/23). * 支持 重叠目标模式 和 放目标右上角但不重叠的模式 两种模式 通过setoverlap 设置, 默认为false=不重叠 */ public class badgehelper extends view { private static final string tag = "badgehelper"; private float density; private paint mtextpaint; private paint mbackgroundpaint; private string text = "0"; private int number; @type private int type = type.type_point; private boolean isoverlap; private final rectf rect = new rectf(); private int badgecolor = 0xffd3321b; //默认的小红点颜色 private int textcolor = 0xffffffff; private float textsize; private int w; private int h; private boolean issetup; private boolean mignoretargetpadding; private boolean iscentervertical; private int leftmargin; private int topmargin; private int rightmargin; private int bottommargin; @intdef({type.type_point, type.type_text}) @retention(retentionpolicy.source) public @interface type { int type_point = 0; int type_text = 1; } public badgehelper(context context) { super(context); } private void init(@type int type, boolean isoverlap) { this.type = type; this.isoverlap = isoverlap; density = getresources().getdisplaymetrics().density; switch (type) { case type.type_point: mbackgroundpaint = new paint(); mbackgroundpaint.setstyle(paint.style.fill); mbackgroundpaint.setflags(paint.anti_alias_flag); mbackgroundpaint.setcolor(badgecolor); //计算小红点无文本情况下的小红点大小, 按屏幕像素计算, 如果你有你自己认为更好的算法, 改这里即可 w = h = math.round(density * 7f); break; case type.type_text: mbackgroundpaint = new paint(); mbackgroundpaint.setstyle(paint.style.fill); mbackgroundpaint.setflags(paint.anti_alias_flag); mbackgroundpaint.setcolor(badgecolor); mtextpaint = new paint(); mtextpaint.setstyle(paint.style.fill); mtextpaint.setflags(paint.anti_alias_flag); mtextpaint.setcolor(textcolor);//文本颜色 if (textsize == 0) { mtextpaint.settextsize(density * 10);//文本大小按屏幕像素 计算, 没写死是为了适配各种屏幕, 但如果你有你认为更合理的计算方式 你可以改这里 } else { mtextpaint.settextsize(textsize);//使用自定义大小 } //计算小红点有文本情况下的小红点大小, 按文本宽高计算, 如果你有你自己认为更好的算法, 改这里即可 float textwidth = gettextwidth("99", mtextpaint); w = h = math.round(textwidth * 1.4f);//让背景比文本大一点 break; } } /** * 设置margin 可用于做偏移 * @param left * @param top * @param right * @param bottom * @return */ public badgehelper setbadgemargins(int left, int top, int right, int bottom) { leftmargin = left; topmargin = top; rightmargin = right; bottommargin = bottom; return this; } /** * 设置gravity居中 * @return */ public badgehelper setbadgecentervertical( ) { iscentervertical = true; return this; } /** * 设置小红点类型 * * @param type * @return */ public badgehelper setbadgetype(@type int type) { this.type = type; return this; } /** * 设置小红点大小, 默认自动适配 * * @param textsize * @return */ public badgehelper setbadgetextsize(int textsize) { context c = getcontext(); resources r; if (c == null) { r = resources.getsystem(); } else { r = c.getresources(); } this.textsize = typedvalue.applydimension(typedvalue.complex_unit_sp, textsize, r.getdisplaymetrics()); return this; } /** * 设置小红点文字颜色, 默认白 * * @param textcolor * @return */ public badgehelper setbadgetextcolor(int textcolor) { this.textcolor = textcolor; return this; } /** * 设置重叠模式, 默认是false(不重叠) * * @param isoverlap 是否把小红点重叠到目标view之上 * @return */ public badgehelper setbadgeoverlap(boolean isoverlap) { return setbadgeoverlap(isoverlap, false); } /** * 设置重叠模式, 默认是false(不重叠) * * @param isoverlap 是否把小红点重叠到目标view之上 * @param isignoretargetpadding 是否忽略目标view的padding * @return */ public badgehelper setbadgeoverlap(boolean isoverlap, boolean isignoretargetpadding) { this.isoverlap = isoverlap; this.mignoretargetpadding = isignoretargetpadding; if (!isoverlap && isignoretargetpadding) { log.w(tag, "警告:只有重叠模式isoverlap=true 设置mignoretargetpadding才有意义"); } return this; } /** * 设置小红点颜色 * * @param mbadgecolor * @return */ public badgehelper setbadgecolor(int mbadgecolor) { this.badgecolor = mbadgecolor; return this; } /** * 设置小红点大小 * * @param w * @param h * @return */ public badgehelper setbadgesize(int w, int h) { this.w = w; this.h = h; return this; } /** * 是否显示 * @param enable */ public void setbadgeenable(boolean enable) { setvisibility(enable?visible:invisible); } /** * 设置小红点的文字 * * @param number */ public void setbadgenumber(int number) { this.number = number; this.text = string.valueof(number); if (issetup) { if(number==0){ setvisibility(invisible); }else{ setvisibility(visible); } invalidate(); } } public void bindtotargetview(tablayout target, int tabindex) { tablayout.tab tab = target.gettabat(tabindex); view targetview = null; view tabview = null; try { field viewfield = tablayout.tab.class.getdeclaredfield("mview"); viewfield.setaccessible(true); targetview = tabview = (view) viewfield.get(tab); } catch (exception e) { e.printstacktrace(); } try { if (tabview != null) { field mtextviewfield = tabview.getclass().getdeclaredfield("mtextview");//"miconview" mtextviewfield.setaccessible(true); targetview = (view) mtextviewfield.get(tabview); } } catch (exception e) { e.printstacktrace(); } if (targetview != null) { bindtotargetview(targetview); } } /** * 绑定小红点到目标view的右上角 * * @param target */ public void bindtotargetview(view target) { init(type, isoverlap); if (getparent() != null) { ((viewgroup) getparent()).removeview(this); } if (target == null) { return; } if (target.getparent() instanceof viewgroup) { viewgroup parent = (viewgroup) target.getparent(); int groupindex = parent.indexofchild(target); parent.removeview(target); if (isoverlap) {//[小红点与目标view重叠]模式 framelayout badgecontainer = new framelayout(getcontext()); viewgroup.layoutparams targetlayoutparams = target.getlayoutparams(); badgecontainer.setlayoutparams(targetlayoutparams); target.setlayoutparams(new viewgroup.layoutparams( viewgroup.layoutparams.wrap_content, viewgroup.layoutparams.wrap_content)); parent.addview(badgecontainer, groupindex, targetlayoutparams); badgecontainer.addview(target); badgecontainer.addview(this); framelayout.layoutparams layoutparams = (framelayout.layoutparams) getlayoutparams(); if(iscentervertical) { layoutparams.gravity = gravity.center_vertical ; }else{ layoutparams.gravity = gravity.end | gravity.top; } if (mignoretargetpadding) { layoutparams.rightmargin = target.getpaddingright() - w; layoutparams.topmargin = target.getpaddingtop() - h / 2; } setlayoutparams(layoutparams); } else {//[小红点放右侧]模式 linearlayout badgecontainer = new linearlayout(getcontext()); badgecontainer.setorientation(linearlayout.horizontal); viewgroup.layoutparams targetlayoutparams = target.getlayoutparams(); badgecontainer.setlayoutparams(targetlayoutparams); target.setlayoutparams(new viewgroup.layoutparams( viewgroup.layoutparams.wrap_content, viewgroup.layoutparams.wrap_content)); parent.addview(badgecontainer, groupindex, targetlayoutparams); badgecontainer.addview(target); badgecontainer.addview(this); if(iscentervertical) { badgecontainer.setgravity(gravity.center_vertical); } } boolean hassetmargin = leftmargin>0||topmargin>0||rightmargin>0||bottommargin>0; if (hassetmargin&&getlayoutparams() instanceof viewgroup.marginlayoutparams) { viewgroup.marginlayoutparams p = (viewgroup.marginlayoutparams) getlayoutparams(); p.setmargins(leftmargin, topmargin, rightmargin, bottommargin); setlayoutparams(p); } issetup = true; } else if (target.getparent() == null) { throw new illegalstateexception("目标view不能没有父布局!"); } if(number==0){ setvisibility(invisible); }else{ setvisibility(visible); } } @override protected void onmeasure(int widthmeasurespec, int heightmeasurespec) { if (w > 0 && h > 0) { setmeasureddimension(w, h); } else { throw new illegalstateexception("如果你自定义了小红点的宽高,就不能设置其宽高小于0 ,否则请不要设置!"); } } @override protected void ondraw(canvas canvas) { super.ondraw(canvas); //这里不用解释了 很简单 就是画一个圆形和文字 rect.left = 0; rect.top = 0; rect.right = getwidth(); rect.bottom = getheight(); canvas.drawroundrect(rect, getwidth() / 2, getwidth() / 2, mbackgroundpaint); if (type == type.type_text) { float textwidth = gettextwidth(text, mtextpaint); float textheight = gettextheight(text, mtextpaint); canvas.drawtext(text, getwidth() / 2 - textwidth / 2, getheight() / 2 + textheight / 2, mtextpaint); } } private float gettextwidth(string text, paint p) { return p.measuretext(text, 0, text.length()); } private float gettextheight(string text, paint p) { rect rect = new rect(); p.gettextbounds(text, 0, text.length(), rect); return rect.height(); } }
#使用示例:
public class main2activity extends appcompatactivity { private textview mvtypea; private textview mvtypeb; private textview mvtypec; private textview mvtyped; private imageview mvtypee; private tablayout mtablayout; private void initview() { mvtypea = (textview) findviewbyid(r.id.vtypea); mvtypeb = (textview) findviewbyid(r.id.vtypeb); mvtypec = (textview) findviewbyid(r.id.vtypec); mvtyped = (textview) findviewbyid(r.id.vtyped); mvtypee = (imageview) findviewbyid(r.id.vtypee); mtablayout = (tablayout) findviewbyid(r.id.tablayout); } @override protected void oncreate(bundle savedinstancestate) { super.oncreate(savedinstancestate); setcontentview(r.layout.activity_main2); initview(); //情况a(有margin时) new badgehelper(this) .setbadgetype(badgehelper.type.type_point) .setbadgeoverlap(false) .bindtotargetview(mvtypea); //情况b(有padding时) new badgehelper(this) .setbadgetype(badgehelper.type.type_point) .setbadgeoverlap(true, true)//重叠模式+忽略目标viewpadding 效果, 什么意思? 你可以把第二个参数写成false看看会发生什么 .bindtotargetview(mvtypeb); //情况c(默认情况) badgehelper badgehelperc = new badgehelper(this) .setbadgetype(badgehelper.type.type_text) .setbadgeoverlap(false); badgehelperc.bindtotargetview(mvtypec); badgehelperc.setbadgenumber(6);//数字模式 //情况d(有权重时) new badgehelper(this) .setbadgecolor(0xff0f00ff)//顺便演示下 小红点颜色的设置 .setbadgetype(badgehelper.type.type_point) .setbadgeoverlap(false) .bindtotargetview(mvtyped); //情况e(小红点与图片重叠)+ 数字模式 badgehelper badgehelpere = new badgehelper(this) .setbadgetype(badgehelper.type.type_text) .setbadgeoverlap(true, true);//注意 isignoretargetpadding=true时 和 setbadgemargins 不能同时使用 //.setbadgesize(100,100)//设置小红点的大小, 如果未设置则使用默认宽高, 一般默认就好 //.setbadgetextsize(15) //设置文本大小, 不设置 则使用默认, 一般默认就好 badgehelpere.bindtotargetview(mvtypee); //任意地方可以刷新数字 badgehelpere.setbadgenumber(58);//数字 //情况f(tablayout兼容) badgehelper badgehelperf = new badgehelper(this) .setbadgetype(badgehelper.type.type_text) .setbadgecentervertical()//红点居中 .setbadgemargins(10,0,0,0)//偏移一下 .setbadgeoverlap(false); badgehelperf.bindtotargetview(mtablayout, 0); badgehelperf.setbadgenumber(5); new badgehelper(this) .setbadgetype(badgehelper.type.type_point) .setbadgecentervertical()//红点居中 .setbadgemargins(10,0,0,0)//偏移一下 .setbadgeoverlap(false) .bindtotargetview(mtablayout,1); } }
#布局:
<?xml version="1.0" encoding="utf-8"?> <linearlayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:app="http://schemas.android.com/apk/res-auto" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="vertical" android:padding="16dp" tools:context="com.mx.test12.main2activity"> <textview android:background="#220000ff" android:id="@+id/vtypea" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_margin="20dp" android:text="情况a(有margin时)" /> <textview android:background="#2200ff00" android:id="@+id/vtypeb" android:layout_width="wrap_content" android:layout_height="wrap_content" android:padding="30dp" android:text="情况b(有padding时)" /> <textview android:id="@+id/vtypec" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="情况c(默认情况)" /> <linearlayout android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_gravity="center" android:gravity="center_vertical" android:orientation="horizontal"> <textview android:background="#2200ffff" android:id="@+id/vtyped" android:layout_width="0dp" android:layout_height="wrap_content" android:layout_weight="1" android:text="情况d(有权重时)" /> <view android:layout_width="0dp" android:layout_height="0dp" /> </linearlayout> <imageview android:id="@+id/vtypee" android:layout_width="wrap_content" android:layout_height="wrap_content" android:contentdescription="情况e(与图片重叠)" android:padding="20dp" android:src="@mipmap/ic_launcher" /> <android.support.design.widget.tablayout android:id="@+id/tablayout" android:layout_width="match_parent" android:layout_height="55dp" app:layout_scrollflags="scroll" app:tabindicatorcolor="#057523" app:tabindicatorheight="2.0dp" app:tabmode="fixed" app:tabselectedtextcolor="#057523" app:tabtextcolor="#ced0d3"> <android.support.design.widget.tabitem android:layout_width="match_parent" android:layout_height="match_parent" android:text="聊天列表" /> <android.support.design.widget.tabitem android:layout_width="match_parent" android:layout_height="match_parent" android:text="好友列表" /> <android.support.design.widget.tabitem android:layout_width="match_parent" android:layout_height="match_parent" android:text="设置" /> </android.support.design.widget.tablayout> </linearlayout>
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