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.RichEditor
        android: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() {
            @Override
            public 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() {
            @Override
            public void onClick(View v) {
                mEditor.undo();
            }
        });
        /**
         * 恢复撤销的内容
         */
        findViewById(R.id.action_redo).setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                mEditor.redo();
            }
        });
        /**
         * 加粗
         */
        findViewById(R.id.action_bold).setOnClickListener(new View.OnClickListener() {

            @Override
            public void onClick(View v) {
                mEditor.focusEditor();
                mEditor.setBold();
            }
        });
        /**
         * 斜体
         */
        findViewById(R.id.action_italic).setOnClickListener(new View.OnClickListener() {

            @Override
            public void onClick(View v) {
                mEditor.focusEditor();
                mEditor.setItalic();
            }
        });
        /**
         * 下角表
         */
        findViewById(R.id.action_subscript).setOnClickListener(new View.OnClickListener() {
            @Override
            public 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() {
            @Override
            public 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() {
            @Override
            public void onClick(View v) {
                mEditor.focusEditor();
                mEditor.setStrikeThrough();
            }
        });
        /**
         *下划线
         */
        findViewById(R.id.action_underline).setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                mEditor.focusEditor();
                mEditor.setUnderline();
            }
        });
        /**
         * 设置标题（1到6）
         */
        findViewById(R.id.action_heading1).setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                mEditor.setHeading(1);
            }
        });

        findViewById(R.id.action_heading2).setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                mEditor.setHeading(2);
            }
        });

        findViewById(R.id.action_heading3).setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                mEditor.setHeading(3);
            }
        });

        findViewById(R.id.action_heading4).setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                mEditor.setHeading(4);
            }
        });

        findViewById(R.id.action_heading5).setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                mEditor.setHeading(5);
            }
        });

        findViewById(R.id.action_heading6).setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                mEditor.setHeading(6);
            }
        });
        /**
         * 设置字体颜色
         */
        findViewById(R.id.action_txt_color).setOnClickListener(new View.OnClickListener() {
            @Override
            public 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() {
                            @Override
                            public 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() {
            @Override
            public 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() {
                            @Override
                            public 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() {
            @Override
            public void onClick(View v) {
                mEditor.focusEditor();
                mEditor.setIndent();
            }
        });
        /**
         * 向左缩进
         */
        findViewById(R.id.action_outdent).setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                mEditor.focusEditor();
                mEditor.setOutdent();
            }
        });
        /**
         *文章左对齐
         */
        findViewById(R.id.action_align_left).setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                mEditor.focusEditor();
                mEditor.setAlignLeft();
            }
        });
        /**
         * 文章居中对齐
         */
        findViewById(R.id.action_align_center).setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                mEditor.setAlignCenter();
            }
        });
        /**
         * 文章右对齐
         */
        findViewById(R.id.action_align_right).setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                mEditor.setAlignRight();
            }
        });
        /**
         * 无序排列
         */
        findViewById(R.id.action_insert_bullets).setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                mEditor.setBullets();
            }
        });
        /**
         * 有序排列
         */
        findViewById(R.id.action_insert_numbers).setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                mEditor.setNumbers();
            }
        });
        /**
         * 引用
         */
        findViewById(R.id.action_blockquote).setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                mEditor.setBlockquote();
            }
        });

        /**
         * 插入图片
         */
        findViewById(R.id.action_insert_image).setOnClickListener(new View.OnClickListener() {
            @Override
            public 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() {
            @Override
            public 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() {
                            @Override
                            public 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() {
            @Override
            public void onClick(View v) {
                mEditor.focusEditor();
                mEditor.insertTodo();
            }
        });

        /**
         * 获取并显示Html
         */
        findViewById(R.id.tv_showhtml).setOnClickListener(new View.OnClickListener() {
            @Override
            public 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};

@Override
    public 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);
        }
    }

    @Override
    protected 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-100%");
                        mEditor.insertImage(realPathFromUri, realPathFromUri + "" style="max-100%");
//                        mEditor.insertImage(realPathFromUri, realPathFromUri + "" style="max-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-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

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

注：本文著作权归作者，由demo大师代发，拒绝转载，转载需要作者授权