【Android】基于webView打造富文本编辑器（H5）

前言

HTML5是构建Web内容的一种语言描述方式。HTML5是Web中核心语言HTML的规范，用户使用任何手段进行网页浏览时看到的内容原本都是HTML格式的，在浏览器中通过一些技术处理将其转换成为了可识别的信息。

而WebView 是一种嵌入式浏览器，原生APP应用可以用它来展示网络内容。其功能强大，除了具有一般View的属性和设置外，还可以对url请求、页面加载、渲染、页面交互进行强大的处理.。
在这里插入图片描述
所以，因为H5的跨平台和成本低的优势，越来越多的项目都使用了Android原生控件与WebView进行混合开发，用WebView加载html界面，实现本地安卓代码与HTML+CSS+JS的交互。

webView的基本使用可以参考这篇文章：https://blog.csdn.net/carson_ho/article/details/52693322

本文将利用webView实现一个富文本编辑器，它是一种可内嵌于浏览器，所见即所得的文本编辑器，其实质就是html代码，可改变文本样式、文间插入图片或视频等。我为了实现这一功能借鉴很多项目（主要是MRichEditor和RichEditTextCopyToutiao，都是基于 richeditor-android），修复了一些Bug，最终效果还行。借鉴的第三方库可移步我之前写的文章：常用的第三方开源库汇总

一、实现效果

在这里插入图片描述

二、具体实现

富文本编辑器主要功能就是文字大小、颜色、加粗、斜体、下划线、删除线、缩进、居中或靠左靠右，无序或有序列表，插入链接、图片、视频等。原有项目会存在一些导入html标签和输入框光标的bug，解决这些需要一点HTML+CSS+JS的知识。

1. 导入网页资源

在项目根目录下新建assets文件夹
在这里插入图片描述
导入资源：对于熟悉网页端的开发人员来说，修改这些并不难。

2. 页面设计

编辑器的一个按钮即对应着js中的一个函数，通过RichEditor自定义 view去调用js函数，它继承自 Webview ，加载html文件，枚举类型Type定义了支持的排版格式。

publicclassRichEditorextendsWebView{privatestaticfinalStringSETUP_HTML="file:///android_asset/editor.html";publicenumType{BOLD,ITALIC,SUBSCRIPT,SUPERSCRIPT,STRIKETHROUGH,UNDERLINE,H1,H2,H3,H4,H5,H6,ORDEREDLIST,UNORDEREDLIST,JUSTIFYCENTER,JUSTIFYFULL,JUSTIFYLEFT,JUSTIFYRIGHT}@SuppressLint("SetJavaScriptEnabled")publicRichEditor(Context context,AttributeSet attrs,int defStyleAttr){super(context, attrs, defStyleAttr);setVerticalScrollBarEnabled(false);setHorizontalScrollBarEnabled(false);getSettings().setJavaScriptEnabled(true);setWebChromeClient(newWebChromeClient());setWebViewClient(createWebviewClient());loadUrl(SETUP_HTML);applyAttributes(context, attrs);}}

其中editor.html即编辑器所展示的主页面

<!DOCTYPEhtml><html><head><metaname="viewport"content="user-scalable=no"><metahttp-equiv="Content-Type"content="text/html; charset=UTF-8"><linkrel="stylesheet"type="text/css"href="normalize.css"><linkrel="stylesheet"type="text/css"href="style.css"></head><body><divid="editor"contenteditable="true"></div><scripttype="text/javascript"src="rich_editor.js"></script></body></html>

RichEditor控件中的一个功能就对应着rich_editor.js中的一个函数，例如加粗效果：

RichEditor：

publicvoidsetBold(){exec("javascript:RE.setBold();");}

rich_editor.js：

RE.setBold=function(){
    document.execCommand('bold',false,null);RE.enabledEditingItems()}

最后，RichEditor在布局中使用：

<com.text.richeditor.editor.RichEditorandroid:id="@+id/rich_Editor"android:layout_width="match_parent"android:layout_height="0dp"android:layout_weight="1"android:overScrollMode="never"/>

主要样式如下：
在这里插入图片描述
除了底部的功能栏可以使用，最左边还有一个排版按钮，这里主要是为了不方便弹出底部时，可以选择使用弹窗弹出功能栏，功能是一致的，可以选择性阉割。使用某一功能时会有颜色高亮提示。

3. 功能调用

首先要在activity中初始化控件，实现setOnDecorationChangeListener接口，监听点击某个功能按钮时显示对应高亮，让用户看到现在正在所使用的排版格式。

//输入框显示字体的大小
        rich_Editor.setEditorFontSize(16)//输入框显示字体的颜色
        rich_Editor.setEditorFontColor(ContextCompat.getColor(this,R.color.deepGrey))//输入框背景设置
        rich_Editor.setEditorBackgroundColor(Color.WHITE)//输入框文本padding
        rich_Editor.setPadding(10,10,10,10)//输入提示文本
        rich_Editor.setPlaceholder("点击输入正文！~")
        rich_Editor.setOnDecorationChangeListener{ _, types ->val flagArr = ArrayList<String>()for(i in types.indices){
                flagArr.add(types[i].name)}if(flagArr.contains("BOLD")){
                button_bold.setColorFilter(
                    ContextCompat.getColor(this@RichTextActivity,
                        R.color.colorPrimary
                    ))
                mEditorMenuFragment.updateActionStates(ActionType.BOLD,true)}else{
                button_bold.setColorFilter(
                    ContextCompat.getColor(this@RichTextActivity,
                        R.color.tintColor
                    ))
                mEditorMenuFragment.updateActionStates(ActionType.BOLD,false)}if(flagArr.contains("ITALIC")){
                button_italic.setColorFilter(
                    ContextCompat.getColor(this@RichTextActivity,
                        R.color.colorPrimary
                    ))
                mEditorMenuFragment.updateActionStates(ActionType.ITALIC,true)}else{
                button_italic.setColorFilter(
                    ContextCompat.getColor(this@RichTextActivity,
                        R.color.tintColor
                    ))
                mEditorMenuFragment.updateActionStates(ActionType.ITALIC,false)}if(flagArr.contains("STRIKETHROUGH")){
                button_strikethrough.setColorFilter(
                    ContextCompat.getColor(this@RichTextActivity,
                        R.color.colorPrimary
                    ))
                mEditorMenuFragment.updateActionStates(ActionType.STRIKETHROUGH,true)}else{
                button_strikethrough.setColorFilter(
                    ContextCompat.getColor(this@RichTextActivity,
                        R.color.tintColor
                    ))
                mEditorMenuFragment.updateActionStates(ActionType.STRIKETHROUGH,false)}if(flagArr.contains("JUSTIFYCENTER")){
                button_align_center.setColorFilter(
                    ContextCompat.getColor(this@RichTextActivity,
                        R.color.colorPrimary
                    ))
                button_align_left.setColorFilter(
                    ContextCompat.getColor(this@RichTextActivity,
                        R.color.tintColor
                    ))
                button_align_right.setColorFilter(
                    ContextCompat.getColor(this@RichTextActivity,
                        R.color.tintColor
                    ))
                mEditorMenuFragment.updateActionStates(ActionType.JUSTIFY_CENTER,true)
                mEditorMenuFragment.updateActionStates(ActionType.JUSTIFY_LEFT,false)
                mEditorMenuFragment.updateActionStates(ActionType.JUSTIFY_RIGHT,false)}else{
                button_align_center.setColorFilter(
                    ContextCompat.getColor(this@RichTextActivity,
                        R.color.tintColor
                    ))
                mEditorMenuFragment.updateActionStates(ActionType.JUSTIFY_CENTER,false)}if(flagArr.contains("JUSTIFYLEFT")){
                button_align_center.setColorFilter(
                    ContextCompat.getColor(this@RichTextActivity,
                        R.color.tintColor
                    ))
                button_align_left.setColorFilter(
                    ContextCompat.getColor(this@RichTextActivity,
                        R.color.colorPrimary
                    ))
                button_align_right.setColorFilter(
                    ContextCompat.getColor(this@RichTextActivity,
                        R.color.tintColor
                    ))
                mEditorMenuFragment.updateActionStates(ActionType.JUSTIFY_CENTER,false)
                mEditorMenuFragment.updateActionStates(ActionType.JUSTIFY_LEFT,true)
                mEditorMenuFragment.updateActionStates(ActionType.JUSTIFY_RIGHT,false)}else{
                button_align_left.setColorFilter(
                    ContextCompat.getColor(this@RichTextActivity,
                        R.color.tintColor
                    ))
                mEditorMenuFragment.updateActionStates(ActionType.JUSTIFY_LEFT,false)}if(flagArr.contains("JUSTIFYRIGHT")){
                button_align_center.setColorFilter(
                    ContextCompat.getColor(this@RichTextActivity,
                        R.color.tintColor
                    ))
                button_align_left.setColorFilter(
                    ContextCompat.getColor(this@RichTextActivity,
                        R.color.tintColor
                    ))
                button_align_right.setColorFilter(
                    ContextCompat.getColor(this@RichTextActivity,
                        R.color.colorPrimary
                    ))
                mEditorMenuFragment.updateActionStates(ActionType.JUSTIFY_CENTER,false)
                mEditorMenuFragment.updateActionStates(ActionType.JUSTIFY_LEFT,false)
                mEditorMenuFragment.updateActionStates(ActionType.JUSTIFY_RIGHT,true)}else{
                button_align_right.setColorFilter(
                    ContextCompat.getColor(this@RichTextActivity,
                        R.color.tintColor
                    ))
                mEditorMenuFragment.updateActionStates(ActionType.JUSTIFY_RIGHT,false)}if(flagArr.contains("UNDERLINE")){
                button_underline.setColorFilter(
                    ContextCompat.getColor(this@RichTextActivity,
                        R.color.colorPrimary
                    ))
                mEditorMenuFragment.updateActionStates(ActionType.UNDERLINE,true)}else{
                button_underline.setColorFilter(
                    ContextCompat.getColor(this@RichTextActivity,
                        R.color.tintColor
                    ))
                mEditorMenuFragment.updateActionStates(ActionType.UNDERLINE,false)}if(flagArr.contains("ORDEREDLIST")){
                button_list_ol.setColorFilter(
                    ContextCompat.getColor(this@RichTextActivity,
                        R.color.colorPrimary
                    ))
                button_list_ul.setColorFilter(
                    ContextCompat.getColor(this@RichTextActivity,
                        R.color.tintColor
                    ))
                mEditorMenuFragment.updateActionStates(ActionType.ORDERED,true)
                mEditorMenuFragment.updateActionStates(ActionType.UNORDERED,false)}else{
                button_list_ol.setColorFilter(
                    ContextCompat.getColor(this@RichTextActivity,
                        R.color.tintColor
                    ))
                mEditorMenuFragment.updateActionStates(ActionType.ORDERED,false)}if(flagArr.contains("UNORDEREDLIST")){
                button_list_ul.setColorFilter(
                    ContextCompat.getColor(this@RichTextActivity,
                        R.color.colorPrimary
                    ))
                button_list_ol.setColorFilter(
                    ContextCompat.getColor(this@RichTextActivity,
                        R.color.tintColor
                    ))
                mEditorMenuFragment.updateActionStates(ActionType.ORDERED,false)
                mEditorMenuFragment.updateActionStates(ActionType.UNORDERED,true)}else{
                button_list_ul.setColorFilter(
                    ContextCompat.getColor(this@RichTextActivity,
                        R.color.tintColor
                    ))
                mEditorMenuFragment.updateActionStates(ActionType.UNORDERED,false)}}

插入图片和视频：原本是调用特有的方法实现，但是可定制化不高，我就改成了插入html的形式

publicvoidinsertVideoPercentage(String url,String width,String height){exec("javascript:RE.prepareInsert();");//        exec("javascript:RE.insertVideoWH('" + url + "', '" + width + "', '" + height + "');");String testStr ="<video src=\""+ url +"\" width=\""+ width +"\"  height=\""+ height +"\" controls></video><br>";exec("javascript:RE.insertHTML('"+ testStr +"');");}publicvoidinsertImage(String url,String alt){exec("javascript:RE.prepareInsert();");String testStr ="<img src=\""+ url +"\" alt=\""+ alt +"\" width=\"80%\"><br><br>";exec("javascript:RE.insertHTML('"+ testStr +"');");}

// 以下图片视频地址，来自网络素材funselectImage(){// 进入相册选择照片之后可以本地文件直接插入html，或者上传到服务器获取地址再插入html中val path="https://upload-images.jianshu.io/upload_images/5809200-a99419bb94924e6d.jpg?imageMogr2/auto-orient/strip%7CimageView2/2/w/1240"againEdit()
        rich_Editor.insertImage(path,"dachshund")
        KeyBoardUtils.openKeyboard(edit_name,this@RichTextActivity)}funselectVideo(){// 选择视频之后可以本地文件直接插入html，或者上传到服务器获取地址再插入html中val path="https://media.w3.org/2010/05/sintel/trailer.mp4"againEdit()
        rich_Editor.insertVideoPercentage(path,"80%","30%")
        KeyBoardUtils.openKeyboard(edit_name,this@RichTextActivity)}

图片删除：插入图片后点击图片可将图片删除：

@SuppressLint("ClickableViewAccessibility")publicvoidsetImageClickListener(ImageClickListener imageClickListener){this.imageClickListener = imageClickListener;if(this.imageClickListener !=null){RichEditor.this.setOnTouchListener(newOnTouchListener(){@OverridepublicbooleanonTouch(View v,MotionEvent event){switch(event.getAction()){caseMotionEvent.ACTION_DOWN:DownX=(int) event.getX();DownY=(int) event.getY();
                            moveX =0;
                            moveY =0;
                            currentMS =System.currentTimeMillis();//long currentMS     获取系统时间break;caseMotionEvent.ACTION_MOVE:
                            moveX +=Math.abs(event.getX()-DownX);//X轴距离
                            moveY +=Math.abs(event.getY()-DownY);//y轴距离DownX= event.getX();DownY= event.getY();break;caseMotionEvent.ACTION_UP:long moveTime =System.currentTimeMillis()- currentMS;//移动时间//判断是否继续传递信号if(moveTime <400&&(moveX <25&& moveY <25)){//这里是点击HitTestResult mResult =getHitTestResult();if(mResult !=null){finalint type = mResult.getType();if(type ==HitTestResult.IMAGE_TYPE){//|| type == WebView.HitTestResult.IMAGE_ANCHOR_TYPE || type == WebView.HitTestResult.SRC_IMAGE_ANCHOR_TYPE//如果是点击图片String imageUrl = mResult.getExtra();setInputEnabled(false);postDelayed(newRunnable(){@Overridepublicvoidrun(){if(imageClickListener !=null){if(imageUrl.contains("file://")){//说明是本地文件去除String newImageUrl = imageUrl.replace("file://","");
                                                        imageClickListener.onImageClick(newImageUrl);}else{
                                                        imageClickListener.onImageClick(imageUrl);}}}},200);}else{//不是点击的图片}}}break;}returnfalse;}});}}

view.findViewById<View>(R.id.linear_delete_pic).setOnClickListener{ v: View?->//删除图片val removeUrl ="<img src=\"$currentUrl\" alt=\"dachshund\" width=\"80%\"><br>"val newUrl: String = rich_Editor.html.replace(removeUrl,"")
            currentUrl =""
            rich_Editor.html = newUrl
            if(RichUtils.isEmpty(rich_Editor.html)){
                rich_Editor.html =""}
            popupWindow?.dismiss()}

插入链接：必须要先执行一次restorerange ，控制用户选择的文本范围或光标的当前位置

RE.restorerange=function(){var selection = window.getSelection();
    selection.removeAllRanges();var range = document.createRange();
    range.setStart(RE.currentSelection.startContainer,RE.currentSelection.startOffset);
    range.setEnd(RE.currentSelection.endContainer,RE.currentSelection.endOffset);
    selection.addRange(range);}RE.insertLink=function(url, title){RE.restorerange();var sel = document.getSelection();if(sel.toString().length ==0){
        document.execCommand("insertHTML",false,"<a href='"+url+"'>"+title+"</a>");}elseif(sel.rangeCount){var el = document.createElement("a");
       el.setAttribute("href", url);
       el.setAttribute("title", title);var range = sel.getRangeAt(0).cloneRange();
       range.surroundContents(el);
       sel.removeAllRanges();
       sel.addRange(range);}RE.callback();}

焦点的处理：

（1）每一次调用排版功能都要调用一次，重新处理输入焦点，避免焦点冲突

privatefunagainEdit(){//如果第一次点击例如加粗，没有焦点时，获取焦点并弹出软键盘
        rich_Editor.focusEditor()
        KeyBoardUtils.openKeyboard(edit_name,this@RichTextActivity)}

publicvoidfocusEditor(){requestFocus();exec("javascript:RE.focus();");}

RE.focus=function(){var range = document.createRange();
    range.selectNodeContents(RE.editor);
    range.collapse(false);//    var selection = window.getSelection();//    selection.removeAllRanges();//    selection.addRange(range);RE.editor.focus();}

（2）这里弹出排版页面时必须同时弹出键盘，否则输入框的焦点消失，之前所设置的格式也会随之消失。比如我在底部点了个加粗效果，再点击排版弹窗时，加粗效果应该存在。但是一旦键盘关闭焦点消失，光标的效果也会被重置。
在这里插入图片描述

    KeyboardUtils.registerSoftInputChangedListener(this){ height: Int ->//键盘打开
            isKeyboardShowing = height >0if(height >0){//fl_action.visibility = View.GONEval params = fl_action.layoutParams
                params.height = height/2
                fl_action.layoutParams = params
            }else{//if (fl_action.visibility != View.VISIBLE)
                fl_action.visibility = View.GONE
                iv_action.setColorFilter(ContextCompat.getColor(this@RichTextActivity, R.color.tintColor))}}

        iv_action.setOnClickListener{if(fl_action.visibility == View.VISIBLE){
                fl_action.visibility = View.GONE
                iv_action.setColorFilter(ContextCompat.getColor(this@RichTextActivity, R.color.tintColor))}else{//                if (isKeyboardShowing) {//                    KeyboardUtils.hideSoftInput(this@RichTextActivity)//                }
                KeyboardUtils.showSoftInput(this@RichTextActivity)
                fl_action.visibility = View.VISIBLE
                iv_action.setColorFilter(ContextCompat.getColor(this@RichTextActivity, R.color.colorPrimary))}}

主要的逻辑代码(RichTextActivity.kt)：

class RichTextActivity :AppCompatActivity(), OnActionPerformListener {privatevar popupWindow //编辑图片的pop: CommonPopupWindow?=nullprivatevar currentUrl=""privateval mEditorMenuFragment by lazy{EditorMenuFragment(R.id.fl_action)}privatevar isKeyboardShowing =falseprivateval inputLinkDialog by lazy {InputLinkDialog(this, sureListener ={href, name ->againEdit()
        rich_Editor.insertLink(href,name)})}overridefunonCreate(savedInstanceState: Bundle?){super.onCreate(savedInstanceState)setContentView(R.layout.activity_rich_text)initData()}privatefuninitData(){initPop()initEditor()}privatefuninitEditor(){//输入框显示字体的大小
        rich_Editor.setEditorFontSize(16)//输入框显示字体的颜色
        rich_Editor.setEditorFontColor(ContextCompat.getColor(this,R.color.deepGrey))//输入框背景设置
        rich_Editor.setEditorBackgroundColor(Color.WHITE)//输入框文本padding
        rich_Editor.setPadding(10,10,10,10)//输入提示文本
        rich_Editor.setPlaceholder("点击输入正文！~")//文本输入框监听事件
        rich_Editor.setOnTextChangeListener{ text -> Log.e("富文本文字变动", text!!)}
        edit_name.addTextChangedListener(object: TextWatcher {overridefunbeforeTextChanged(s: CharSequence, start: Int, count: Int, after: Int){}overridefunonTextChanged(s: CharSequence, start: Int, before: Int, count: Int){}overridefunafterTextChanged(s: Editable){
                tv_sum.text = edit_name.text.toString().length.toString()+"/100"val html = rich_Editor.html
            }})
        rich_Editor.setOnDecorationChangeListener{ _, types ->val flagArr = ArrayList<String>()for(i in types.indices){
                flagArr.add(types[i].name)}if(flagArr.contains("BOLD")){
                button_bold.setColorFilter(
                    ContextCompat.getColor(this@RichTextActivity,
                        R.color.colorPrimary
                    ))
                mEditorMenuFragment.updateActionStates(ActionType.BOLD,true)}else{
                button_bold.setColorFilter(
                    ContextCompat.getColor(this@RichTextActivity,
                        R.color.tintColor
                    ))
                mEditorMenuFragment.updateActionStates(ActionType.BOLD,false)}if(flagArr.contains("ITALIC")){
                button_italic.setColorFilter(
                    ContextCompat.getColor(this@RichTextActivity,
                        R.color.colorPrimary
                    ))
                mEditorMenuFragment.updateActionStates(ActionType.ITALIC,true)}else{
                button_italic.setColorFilter(
                    ContextCompat.getColor(this@RichTextActivity,
                        R.color.tintColor
                    ))
                mEditorMenuFragment.updateActionStates(ActionType.ITALIC,false)}if(flagArr.contains("STRIKETHROUGH")){
                button_strikethrough.setColorFilter(
                    ContextCompat.getColor(this@RichTextActivity,
                        R.color.colorPrimary
                    ))
                mEditorMenuFragment.updateActionStates(ActionType.STRIKETHROUGH,true)}else{
                button_strikethrough.setColorFilter(
                    ContextCompat.getColor(this@RichTextActivity,
                        R.color.tintColor
                    ))
                mEditorMenuFragment.updateActionStates(ActionType.STRIKETHROUGH,false)}if(flagArr.contains("JUSTIFYCENTER")){
                button_align_center.setColorFilter(
                    ContextCompat.getColor(this@RichTextActivity,
                        R.color.colorPrimary
                    ))
                button_align_left.setColorFilter(
                    ContextCompat.getColor(this@RichTextActivity,
                        R.color.tintColor
                    ))
                button_align_right.setColorFilter(
                    ContextCompat.getColor(this@RichTextActivity,
                        R.color.tintColor
                    ))
                mEditorMenuFragment.updateActionStates(ActionType.JUSTIFY_CENTER,true)
                mEditorMenuFragment.updateActionStates(ActionType.JUSTIFY_LEFT,false)
                mEditorMenuFragment.updateActionStates(ActionType.JUSTIFY_RIGHT,false)}else{
                button_align_center.setColorFilter(
                    ContextCompat.getColor(this@RichTextActivity,
                        R.color.tintColor
                    ))
                mEditorMenuFragment.updateActionStates(ActionType.JUSTIFY_CENTER,false)}if(flagArr.contains("JUSTIFYLEFT")){
                button_align_center.setColorFilter(
                    ContextCompat.getColor(this@RichTextActivity,
                        R.color.tintColor
                    ))
                button_align_left.setColorFilter(
                    ContextCompat.getColor(this@RichTextActivity,
                        R.color.colorPrimary
                    ))
                button_align_right.setColorFilter(
                    ContextCompat.getColor(this@RichTextActivity,
                        R.color.tintColor
                    ))
                mEditorMenuFragment.updateActionStates(ActionType.JUSTIFY_CENTER,false)
                mEditorMenuFragment.updateActionStates(ActionType.JUSTIFY_LEFT,true)
                mEditorMenuFragment.updateActionStates(ActionType.JUSTIFY_RIGHT,false)}else{
                button_align_left.setColorFilter(
                    ContextCompat.getColor(this@RichTextActivity,
                        R.color.tintColor
                    ))
                mEditorMenuFragment.updateActionStates(ActionType.JUSTIFY_LEFT,false)}if(flagArr.contains("JUSTIFYRIGHT")){
                button_align_center.setColorFilter(
                    ContextCompat.getColor(this@RichTextActivity,
                        R.color.tintColor
                    ))
                button_align_left.setColorFilter(
                    ContextCompat.getColor(this@RichTextActivity,
                        R.color.tintColor
                    ))
                button_align_right.setColorFilter(
                    ContextCompat.getColor(this@RichTextActivity,
                        R.color.colorPrimary
                    ))
                mEditorMenuFragment.updateActionStates(ActionType.JUSTIFY_CENTER,false)
                mEditorMenuFragment.updateActionStates(ActionType.JUSTIFY_LEFT,false)
                mEditorMenuFragment.updateActionStates(ActionType.JUSTIFY_RIGHT,true)}else{
                button_align_right.setColorFilter(
                    ContextCompat.getColor(this@RichTextActivity,
                        R.color.tintColor
                    ))
                mEditorMenuFragment.updateActionStates(ActionType.JUSTIFY_RIGHT,false)}if(flagArr.contains("UNDERLINE")){
                button_underline.setColorFilter(
                    ContextCompat.getColor(this@RichTextActivity,
                        R.color.colorPrimary
                    ))
                mEditorMenuFragment.updateActionStates(ActionType.UNDERLINE,true)}else{
                button_underline.setColorFilter(
                    ContextCompat.getColor(this@RichTextActivity,
                        R.color.tintColor
                    ))
                mEditorMenuFragment.updateActionStates(ActionType.UNDERLINE,false)}if(flagArr.contains("ORDEREDLIST")){
                button_list_ol.setColorFilter(
                    ContextCompat.getColor(this@RichTextActivity,
                        R.color.colorPrimary
                    ))
                button_list_ul.setColorFilter(
                    ContextCompat.getColor(this@RichTextActivity,
                        R.color.tintColor
                    ))
                mEditorMenuFragment.updateActionStates(ActionType.ORDERED,true)
                mEditorMenuFragment.updateActionStates(ActionType.UNORDERED,false)}else{
                button_list_ol.setColorFilter(
                    ContextCompat.getColor(this@RichTextActivity,
                        R.color.tintColor
                    ))
                mEditorMenuFragment.updateActionStates(ActionType.ORDERED,false)}if(flagArr.contains("UNORDEREDLIST")){
                button_list_ul.setColorFilter(
                    ContextCompat.getColor(this@RichTextActivity,
                        R.color.colorPrimary
                    ))
                button_list_ol.setColorFilter(
                    ContextCompat.getColor(this@RichTextActivity,
                        R.color.tintColor
                    ))
                mEditorMenuFragment.updateActionStates(ActionType.ORDERED,false)
                mEditorMenuFragment.updateActionStates(ActionType.UNORDERED,true)}else{
                button_list_ul.setColorFilter(
                    ContextCompat.getColor(this@RichTextActivity,
                        R.color.tintColor
                    ))
                mEditorMenuFragment.updateActionStates(ActionType.UNORDERED,false)}}
        rich_Editor.setImageClickListener{ imageUrl ->
            currentUrl = imageUrl
            popupWindow?.showBottom(ll_container,0.5f)}

        button_rich_do.setOnClickListener{ rich_Editor.redo()}
        button_rich_undo.setOnClickListener{ rich_Editor.undo()}
        button_bold.setOnClickListener{againEdit()
            rich_Editor.setBold()}
        button_underline.setOnClickListener{againEdit()
            rich_Editor.setUnderline()}
        button_italic.setOnClickListener{againEdit()
            rich_Editor.setItalic()}
        button_strikethrough.setOnClickListener{againEdit()
            rich_Editor.setStrikeThrough()}//字号
        button_h1.setOnClickListener{againEdit()
            rich_Editor.setFontSize(2)}
        button_h2.setOnClickListener{againEdit()
            rich_Editor.setFontSize(3)}
        button_h3.setOnClickListener{againEdit()
            rich_Editor.setFontSize(4)}
        button_h4.setOnClickListener{againEdit()
            rich_Editor.setFontSize(5)}
        button_indent_decrease.setOnClickListener{againEdit()
            rich_Editor.setOutdent()}
        button_indent_increase.setOnClickListener{againEdit()
            rich_Editor.setIndent()}
        button_list_ul.setOnClickListener{againEdit()
            rich_Editor.setBullets()}
        button_list_ol.setOnClickListener{againEdit()
            rich_Editor.setNumbers()}
        button_align_center.setOnClickListener{againEdit()
            rich_Editor.setAlignCenter()}
        button_align_left.setOnClickListener{againEdit()
            rich_Editor.setAlignLeft()}
        button_align_right.setOnClickListener{againEdit()
            rich_Editor.setAlignRight()}
        button_link.setOnClickListener{
            KeyboardUtils.hideSoftInput(this@RichTextActivity)
            inputLinkDialog.show()}//选择图片
        button_image.setOnClickListener{selectImage()}//选择视频
        button_video.setOnClickListener{selectVideo()}

        mEditorMenuFragment.setActionClickListener(this)
        supportFragmentManager.beginTransaction().add(R.id.fl_action, mEditorMenuFragment, EditorMenuFragment::class.java.name).commit()
        KeyboardUtils.registerSoftInputChangedListener(this){ height: Int ->//键盘打开
            isKeyboardShowing = height >0if(height >0){//fl_action.visibility = View.GONEval params = fl_action.layoutParams
                params.height = height/2
                fl_action.layoutParams = params
            }else{//if (fl_action.visibility != View.VISIBLE)
                fl_action.visibility = View.GONE
                iv_action.setColorFilter(ContextCompat.getColor(this@RichTextActivity, R.color.tintColor))}}

        iv_action.setOnClickListener{if(fl_action.visibility == View.VISIBLE){
                fl_action.visibility = View.GONE
                iv_action.setColorFilter(ContextCompat.getColor(this@RichTextActivity, R.color.tintColor))}else{//                if (isKeyboardShowing) {//                    KeyboardUtils.hideSoftInput(this@RichTextActivity)//                }
                KeyboardUtils.showSoftInput(this@RichTextActivity)
                fl_action.visibility = View.VISIBLE
                iv_action.setColorFilter(ContextCompat.getColor(this@RichTextActivity, R.color.colorPrimary))}}}privatefuninitPop(){val view= LayoutInflater.from(this@RichTextActivity).inflate(R.layout.pop_picture,null)
        view.findViewById<View>(R.id.linear_cancle).setOnClickListener{ popupWindow?.dismiss()}
        view.findViewById<View>(R.id.linear_delete_pic).setOnClickListener{ v: View?->//删除图片val removeUrl ="<img src=\"$currentUrl\" alt=\"dachshund\" width=\"80%\"><br>"val newUrl: String = rich_Editor.html.replace(removeUrl,"")
            currentUrl =""
            rich_Editor.html = newUrl
            if(RichUtils.isEmpty(rich_Editor.html)){
                rich_Editor.html =""}
            popupWindow?.dismiss()}
        popupWindow = CommonPopupWindow.Builder(this@RichTextActivity).setView(view).setWidthAndHeight(
                ViewGroup.LayoutParams.MATCH_PARENT,
                ViewGroup.LayoutParams.WRAP_CONTENT
            ).setOutsideTouchable(true)//在外不可用手指取消.setAnimationStyle(R.style.pop_animation)//设置popWindow的出场动画.create()
        popupWindow?.setOnDismissListener(PopupWindow.OnDismissListener{
            rich_Editor.setInputEnabled(true)})}privatefunagainEdit(){//如果第一次点击例如加粗，没有焦点时，获取焦点并弹出软键盘
        rich_Editor.focusEditor()
        KeyBoardUtils.openKeyboard(edit_name,this@RichTextActivity)}overridefunonActionPerform(type: ActionType?,vararg values: Any?){var value =""if(values !=null&& values.isNotEmpty()){
            value = values[0]as String
        }againEdit()when(type){
            ActionType.FORE_COLOR ->{ rich_Editor.setTextColor(value)}
            ActionType.BOLD ->{ rich_Editor.setBold()}
            ActionType.ITALIC -> rich_Editor.setItalic()
            ActionType.UNDERLINE -> rich_Editor.setUnderline()
            ActionType.STRIKETHROUGH -> rich_Editor.setStrikeThrough()
            ActionType.H1 ->{
                rich_Editor.setFontSize(2)
                mEditorMenuFragment.updateActionStates(ActionType.H1,true)
                mEditorMenuFragment.updateActionStates(ActionType.H2,false)
                mEditorMenuFragment.updateActionStates(ActionType.H3,false)
                mEditorMenuFragment.updateActionStates(ActionType.H4,false)}
            ActionType.H2 ->{
                rich_Editor.setFontSize(3)
                mEditorMenuFragment.updateActionStates(ActionType.H1,false)
                mEditorMenuFragment.updateActionStates(ActionType.H2,true)
                mEditorMenuFragment.updateActionStates(ActionType.H3,false)
                mEditorMenuFragment.updateActionStates(ActionType.H4,false)}
            ActionType.H3 ->{
                rich_Editor.setFontSize(4)
                mEditorMenuFragment.updateActionStates(ActionType.H1,false)
                mEditorMenuFragment.updateActionStates(ActionType.H2,false)
                mEditorMenuFragment.updateActionStates(ActionType.H3,true)
                mEditorMenuFragment.updateActionStates(ActionType.H4,false)}
            ActionType.H4 ->{
                rich_Editor.setFontSize(5)
                mEditorMenuFragment.updateActionStates(ActionType.H1,false)
                mEditorMenuFragment.updateActionStates(ActionType.H2,false)
                mEditorMenuFragment.updateActionStates(ActionType.H3,false)
                mEditorMenuFragment.updateActionStates(ActionType.H4,true)}
            ActionType.JUSTIFY_LEFT -> rich_Editor.setAlignLeft()
            ActionType.JUSTIFY_CENTER -> rich_Editor.setAlignCenter()
            ActionType.JUSTIFY_RIGHT -> rich_Editor.setAlignRight()
            ActionType.INDENT -> rich_Editor.setIndent()
            ActionType.OUTDENT -> rich_Editor.setOutdent()
            ActionType.UNORDERED->rich_Editor.setBullets()
            ActionType.ORDERED->rich_Editor.setNumbers()
            ActionType.IMAGE ->{selectImage()}
            ActionType.LINK ->{
                KeyboardUtils.hideSoftInput(this@RichTextActivity)
                inputLinkDialog.show()}
            ActionType.VIDEO ->{selectVideo()}else->{}}}// 以下图片视频地址，来自网络素材funselectImage(){// 进入相册选择照片之后可以本地文件直接插入html，或者上传到服务器获取地址再插入html中val path="https://upload-images.jianshu.io/upload_images/5809200-a99419bb94924e6d.jpg?imageMogr2/auto-orient/strip%7CimageView2/2/w/1240"againEdit()
        rich_Editor.insertImage(path,"dachshund")
        KeyBoardUtils.openKeyboard(edit_name,this@RichTextActivity)}funselectVideo(){// 选择视频之后可以本地文件直接插入html，或者上传到服务器获取地址再插入html中val path="https://media.w3.org/2010/05/sintel/trailer.mp4"againEdit()
        rich_Editor.insertVideoPercentage(path,"80%","30%")
        KeyBoardUtils.openKeyboard(edit_name,this@RichTextActivity)}}

4. 完整代码

完整代码我已上传github，需要的可以自行pull：https://github.com/FullCourage/RichEditor

总结

这个功能是之前做的，时间间隔有点久了，有些细微的点已经记不得了，由此事后的总结记录就格外重要。

标签： android kotlin webview

本文转载自: https://blog.csdn.net/T01151018/article/details/139629659
版权归原作者 full courage 所有，如有侵权，请联系我们删除。

【Android】基于webView打造富文本编辑器（H5）

目录

前言

一、实现效果

二、具体实现

1. 导入网页资源

2. 页面设计

3. 功能调用

4. 完整代码

总结

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