鸿蒙NEXT实战开发：【截屏】

展示全屏截图和屏幕局部截图。通过[screenshot]模块实现屏幕截图 ，通过[window]模块实现隐私窗口切换，通过[display]模块查询当前隐私窗口。

效果预览

全屏截图	局部截图选择区域	局部截图

使用说明：

1. 点击右上角图标打开弹窗，选择截屏，展示全屏截图；选择局部截屏，选择截屏区域，点击右下角完成，展示局部截屏；
2. 点击滑块切换窗口隐私模式，隐私模式下截屏会弹出提示，拒绝截屏。

具体实现

本示例通过screenshot接口实现屏幕截图 ，通过window接口实现隐私窗口切换，通过display接口查询当前隐私窗口。

• 源码链接：[Screenshot.ets]

  /*
   * Copyright (c) 2022 Huawei Device Co., Ltd.
   * Licensed under the Apache License, Version 2.0 (the "License");
   * you may not use this file except in compliance with the License.
   * You may obtain a copy of the License at
   *
   *     http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  import screenshot from '@ohos.screenshot'
  import { Logger } from './Logger'
  import { getCurrentWindow } from './WindowPrivacy'
  // 屏幕截图 默认参数screenshotOptions为空时 截全屏
  export function getScreenshot(screenshotOption = {}) {
    return screenshot.save(screenshotOption)
  }
  // 设置全屏展示 isFullScreen: boolean
  export function setFullScreen(context: Context, isFullScreen: boolean) {
    getCurrentWindow(context)
      .then(res => {
        res.setFullScreen(isFullScreen, (err) => {
          if (err.code) {
            Logger.error('failed set full-screen mode cause: ' + JSON.stringify(err))
            return
          }
          Logger.info('success set full-screen mode')
        })
      })
  }
  

  • [WindowPrivacy.ets]

    /*
     * Copyright (c) 2022 Huawei Device Co., Ltd.
     * Licensed under the Apache License, Version 2.0 (the "License");
     * you may not use this file except in compliance with the License.
     * You may obtain a copy of the License at
     *
     *     http://www.apache.org/licenses/LICENSE-2.0
     *
     * Unless required by applicable law or agreed to in writing, software
     * distributed under the License is distributed on an "AS IS" BASIS,
     * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     * See the License for the specific language governing permissions and
     * limitations under the License.
     */
    import window from '@ohos.window'
    import display from '@ohos.display'
    import { ResponseData } from '../models/ResponseData'
    import { Logger } from './Logger'
    // 获取当前窗口
    export function getCurrentWindow(context: Context) {
      return window.getTopWindow(context)
    }
    // 判断隐私窗口
    export function hasPrivate(): ResponseData {
      let currentDisplay = null
      try {
        currentDisplay = display.getDefaultDisplaySync()
      } catch (exception) {
        return { status: 'failed', errorMessage: JSON.stringify(exception) }
      }
      if (currentDisplay === null) {
        return { status: 'failed', errorMessage: 'get current display failed' }
      }
      let ret = undefined
      try {
        ret = display.hasPrivateWindow(currentDisplay.id)
      } catch (exception) {
        return { status: 'failed', errorMessage: JSON.stringify(exception) }
      }
      if (ret === undefined) {
        return { status: 'failed', errorMessage: 'ret is undefined' }
      }
      return ret ? { status: 'success', errorMessage: '', result: true } :
        { status: 'success', errorMessage: '', result: false }
    }
    
    // 设置隐私窗口
    export function setWindowPrivacyMode(context: Context, windowPrivacyMode: boolean) {
      let currentWindow = null
      getCurrentWindow(context)
        .then(res => {
          currentWindow = res
          try {
            currentWindow.setWindowPrivacyMode(windowPrivacyMode, (err) => {
              if (err.code) {
                Logger.error('set window privacy mode failed cause: ' + JSON.stringify(err))
                return
              }
              Logger.info(`set window privacy mode success ${windowPrivacyMode}`)
            })
          } catch (exception) {
            Logger.info('set window mode failed cause: ' + JSON.stringify(exception))
          }
        })
    }
    

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