移动端强大的富文本编辑器richeditor-android

代码地址如下：
http://www.demodashi.com/demo/14883.html

####一、运行效果图

####二、代码具体实现

1.引入richeditor-android

richeditor-android需要的jar：
implementation 'jp.wasabeef:richeditor-android:1.2.2'这是一个Dialog框架，demo中不想自己去写，所以就使用了第三方
implementation 'com.afollestad.material-dialogs:core:0.9.6.0'

2.引入控件RichEditor

<jp.wasabeef.richeditor.RichEditorandroid:id="@+id/editor"android:layout_width="match_parent"android:layout_height="wrap_content" />

3.使用到的权限

如果拍照需要相机权限，选择图片需要SD卡权限，插入网络图片需要网络权限

<uses-permission android:name="android.permission.CAMERA" />
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.INTERNET" />

4.初始化RichEditor

mEditor = (RichEditor) findViewById(R.id.editor);//初始化编辑高度
mEditor.setEditorHeight(200);
//初始化字体大小
mEditor.setEditorFontSize(22);
//初始化字体颜色
mEditor.setEditorFontColor(Color.BLACK);
//mEditor.setEditorBackgroundColor(Color.BLUE);//初始化内边距
mEditor.setPadding(10, 10, 10, 10);
//设置编辑框背景，可以是网络图片
//mEditor.setBackground("https://raw.githubusercontent.com/wasabeef/art/master/chip.jpg");
// mEditor.setBackgroundColor(Color.BLUE);
mEditor.setBackgroundResource(R.drawable.bg);
//设置默认显示语句
mEditor.setPlaceholder("Insert text here...");
//设置编辑器是否可用
mEditor.setInputEnabled(true);

5.实时监听Editor输入内容

mPreview = (TextView) findViewById(R.id.preview);mEditor.setOnTextChangeListener(new RichEditor.OnTextChangeListener() {@Overridepublic void onTextChange(String text) {mPreview.setText(text);}});

6.功能方法

     /*** 撤销当前标签状态下所有内容*/findViewById(R.id.action_undo).setOnClickListener(new View.OnClickListener() {@Overridepublic void onClick(View v) {mEditor.undo();}});/*** 恢复撤销的内容*/findViewById(R.id.action_redo).setOnClickListener(new View.OnClickListener() {@Overridepublic void onClick(View v) {mEditor.redo();}});/*** 加粗*/findViewById(R.id.action_bold).setOnClickListener(new View.OnClickListener() {@Overridepublic void onClick(View v) {mEditor.focusEditor();mEditor.setBold();}});/*** 斜体*/findViewById(R.id.action_italic).setOnClickListener(new View.OnClickListener() {@Overridepublic void onClick(View v) {mEditor.focusEditor();mEditor.setItalic();}});/*** 下角表*/findViewById(R.id.action_subscript).setOnClickListener(new View.OnClickListener() {@Overridepublic void onClick(View v) {mEditor.focusEditor();if (mEditor.getHtml() == null) {return;}mEditor.setSubscript();}});/*** 上角标*/findViewById(R.id.action_superscript).setOnClickListener(new View.OnClickListener() {@Overridepublic void onClick(View v) {mEditor.focusEditor();if (mEditor.getHtml() == null) {return;}mEditor.setSuperscript();}});/*** 删除线*/findViewById(R.id.action_strikethrough).setOnClickListener(new View.OnClickListener() {@Overridepublic void onClick(View v) {mEditor.focusEditor();mEditor.setStrikeThrough();}});/***下划线*/findViewById(R.id.action_underline).setOnClickListener(new View.OnClickListener() {@Overridepublic void onClick(View v) {mEditor.focusEditor();mEditor.setUnderline();}});/*** 设置标题（1到6）*/findViewById(R.id.action_heading1).setOnClickListener(new View.OnClickListener() {@Overridepublic void onClick(View v) {mEditor.setHeading(1);}});findViewById(R.id.action_heading2).setOnClickListener(new View.OnClickListener() {@Overridepublic void onClick(View v) {mEditor.setHeading(2);}});findViewById(R.id.action_heading3).setOnClickListener(new View.OnClickListener() {@Overridepublic void onClick(View v) {mEditor.setHeading(3);}});findViewById(R.id.action_heading4).setOnClickListener(new View.OnClickListener() {@Overridepublic void onClick(View v) {mEditor.setHeading(4);}});findViewById(R.id.action_heading5).setOnClickListener(new View.OnClickListener() {@Overridepublic void onClick(View v) {mEditor.setHeading(5);}});findViewById(R.id.action_heading6).setOnClickListener(new View.OnClickListener() {@Overridepublic void onClick(View v) {mEditor.setHeading(6);}});/*** 设置字体颜色*/findViewById(R.id.action_txt_color).setOnClickListener(new View.OnClickListener() {@Overridepublic void onClick(View v) {mEditor.focusEditor();new MaterialDialog.Builder(MainActivity.this).title("选择字体颜色").items(R.array.color_items).itemsCallbackSingleChoice(-1, new MaterialDialog.ListCallbackSingleChoice() {@Overridepublic boolean onSelection(MaterialDialog dialog, View itemView, int which, CharSequence text) {dialog.dismiss();switch (which) {case 0://红mEditor.setTextColor(Color.RED);break;case 1://黄mEditor.setTextColor(Color.YELLOW);break;case 2://蓝mEditor.setTextColor(Color.GREEN);break;case 3://绿mEditor.setTextColor(Color.BLUE);break;case 4://黑mEditor.setTextColor(Color.BLACK);break;}return false;}}).show();}});findViewById(R.id.action_bg_color).setOnClickListener(new View.OnClickListener() {@Overridepublic void onClick(View v) {mEditor.focusEditor();new MaterialDialog.Builder(MainActivity.this).title("选择字体背景颜色").items(R.array.text_back_color_items).itemsCallbackSingleChoice(-1, new MaterialDialog.ListCallbackSingleChoice() {@Overridepublic boolean onSelection(MaterialDialog dialog, View itemView, int which, CharSequence text) {dialog.dismiss();switch (which) {case 0://红mEditor.setTextBackgroundColor(Color.RED);break;case 1://黄mEditor.setTextBackgroundColor(Color.YELLOW);break;case 2://蓝mEditor.setTextBackgroundColor(Color.GREEN);break;case 3://绿mEditor.setTextBackgroundColor(Color.BLUE);break;case 4://黑mEditor.setTextBackgroundColor(Color.BLACK);break;case 5://透明mEditor.setTextBackgroundColor(R.color.transparent);break;}return false;}}).show();}});/*** 向右缩进*/findViewById(R.id.action_indent).setOnClickListener(new View.OnClickListener() {@Overridepublic void onClick(View v) {mEditor.focusEditor();mEditor.setIndent();}});/*** 向左缩进*/findViewById(R.id.action_outdent).setOnClickListener(new View.OnClickListener() {@Overridepublic void onClick(View v) {mEditor.focusEditor();mEditor.setOutdent();}});/***文章左对齐*/findViewById(R.id.action_align_left).setOnClickListener(new View.OnClickListener() {@Overridepublic void onClick(View v) {mEditor.focusEditor();mEditor.setAlignLeft();}});/*** 文章居中对齐*/findViewById(R.id.action_align_center).setOnClickListener(new View.OnClickListener() {@Overridepublic void onClick(View v) {mEditor.setAlignCenter();}});/*** 文章右对齐*/findViewById(R.id.action_align_right).setOnClickListener(new View.OnClickListener() {@Overridepublic void onClick(View v) {mEditor.setAlignRight();}});/*** 无序排列*/findViewById(R.id.action_insert_bullets).setOnClickListener(new View.OnClickListener() {@Overridepublic void onClick(View v) {mEditor.setBullets();}});/*** 有序排列*/findViewById(R.id.action_insert_numbers).setOnClickListener(new View.OnClickListener() {@Overridepublic void onClick(View v) {mEditor.setNumbers();}});/*** 引用*/findViewById(R.id.action_blockquote).setOnClickListener(new View.OnClickListener() {@Overridepublic void onClick(View v) {mEditor.setBlockquote();}});/*** 插入图片*/findViewById(R.id.action_insert_image).setOnClickListener(new View.OnClickListener() {@Overridepublic void onClick(View v) {mEditor.focusEditor();ActivityCompat.requestPermissions(MainActivity.this, mPermissionList, 100);}});/*** 插入连接*/findViewById(R.id.action_insert_link).setOnClickListener(new View.OnClickListener() {@Overridepublic void onClick(View v) {new MaterialDialog.Builder(MainActivity.this).title("将输入连接地址").items("http://blog.csdn.net/huangxiaoguo1").itemsCallbackSingleChoice(-1, new MaterialDialog.ListCallbackSingleChoice() {@Overridepublic boolean onSelection(MaterialDialog dialog, View itemView, int which, CharSequence text) {dialog.dismiss();mEditor.focusEditor();mEditor.insertLink("http://blog.csdn.net/huangxiaoguo1","http://blog.csdn.net/huangxiaoguo1");return false;}}).show();}});/*** 选择框*/findViewById(R.id.action_insert_checkbox).setOnClickListener(new View.OnClickListener() {@Overridepublic void onClick(View v) {mEditor.focusEditor();mEditor.insertTodo();}});/*** 获取并显示Html*/findViewById(R.id.tv_showhtml).setOnClickListener(new View.OnClickListener() {@Overridepublic void onClick(View v) {Intent intent = new Intent(v.getContext(), WebViewActivity.class);intent.putExtra("contextURL", mEditor.getHtml());startActivity(intent);}});

7.插入图片并使用屏幕宽度

权限，我这里只是选着图片，关于拍照的自己可以去实现String[] mPermissionList = new String[]{Manifest.permission.WRITE_EXTERNAL_STORAGE,Manifest.permission.READ_EXTERNAL_STORAGE};

@Overridepublic void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {super.onRequestPermissionsResult(requestCode, permissions, grantResults);switch (requestCode) {case 100:boolean writeExternalStorage = grantResults[0] == PackageManager.PERMISSION_GRANTED;boolean readExternalStorage = grantResults[1] == PackageManager.PERMISSION_GRANTED;if (grantResults.length > 0 && writeExternalStorage && readExternalStorage) {getImage();} else {Toast.makeText(this, "请设置必要权限", Toast.LENGTH_SHORT).show();}break;}}private void getImage() {if (Build.VERSION.SDK_INT < Build.VERSION_CODES.KITKAT) {startActivityForResult(new Intent(Intent.ACTION_GET_CONTENT).setType("image/*"),REQUEST_PICK_IMAGE);} else {Intent intent = new Intent(Intent.ACTION_OPEN_DOCUMENT);intent.addCategory(Intent.CATEGORY_OPENABLE);intent.setType("image/*");startActivityForResult(intent, REQUEST_PICK_IMAGE);}}@Overrideprotected void onActivityResult(int requestCode, int resultCode, Intent data) {super.onActivityResult(requestCode, resultCode, data);if (resultCode == Activity.RESULT_OK) {switch (requestCode) {case REQUEST_PICK_IMAGE:if (data != null) {String realPathFromUri = RealPathFromUriUtils.getRealPathFromUri(this, data.getData());mEditor.insertImage("https://unsplash.it/2000/2000?random&58","huangxiaoguo\" style=\"max-width:100%");mEditor.insertImage(realPathFromUri, realPathFromUri + "\" style=\"max-width:100%");
//                        mEditor.insertImage(realPathFromUri, realPathFromUri + "\" style=\"max-width:100%;max-height:100%");} else {Toast.makeText(this, "图片损坏，请重新选择", Toast.LENGTH_SHORT).show();}break;}}}

注意这里 “\” style=\”max-width:100%”是让我们从手机选择的图片和网络加载的图片适配屏幕宽高，解决图片太大显示不全问题！
####三、项目代码结构目录图

####四、参考文章
richeditor-android github地址：https://github.com/wasabeef/richeditor-android
关于如何获得手机图片真正地址（realPathFromUri ）请看：http://blog.csdn.net/huangxiaoguo1/article/details/78983582
移动端强大的富文本编辑器richeditor-android