wx.chooseImage({
 count: 1, // 默认9
 sizeType: ['original', 'compressed'], // 可以指定是原图还是压缩图，默认二者都有
 sourceType: ['album', 'camera'], // 可以指定来源是相册还是相机，默认二者都有
 success: function (res) {
  // 返回选定照片的本地文件路径列表，tempFilePath可以作为img标签的src属性显示图片
  var tempFilePaths = res.tempFilePaths
 }
})

wx.previewImage({
 current: '', // 当前显示图片的http链接
 urls: [] // 需要预览的图片http链接列表
})

wx.getImageInfo({
 src: 'images/a.jpg',
 success: function (res) {
  console.log(res.width)
  console.log(res.height)
 }
})

wx.chooseImage({
 success: function (res) {
  wx.getImageInfo({
   src: res.tempFilePaths[0],
   success: function (res) {
    console.log(res.width)
    console.log(res.height)
   }
  })
 }
})

wx.startRecord({
 success: function(res) {
  var tempFilePath = res.tempFilePath 
 },
 fail: function(res) {
   //录音失败
 }
})
setTimeout(function() {
 //结束录音 
 wx.stopRecord()
}, 10000)

wx.startRecord({
 success: function(res) {
  var tempFilePath = res.tempFilePath
  wx.playVoice({
   filePath: tempFilePath,
   complete: function(){
   }
  })
 }
})

wx.startRecord({
 success: function(res) {
  var tempFilePath = res.tempFilePath
   wx.playVoice({
   filePath: tempFilePath
  })

  setTimeout(function() {
    //暂停播放
   wx.pauseVoice()
  }, 5000)
 }
})

wx.startRecord({
 success: function(res) {
  var tempFilePath = res.tempFilePath
  wx.playVoice({
   filePath:tempFilePath
  })

  setTimeout(function(){
   wx.stopVoice()
  }, 5000)
 }
})

wx.getBackgroundAudioPlayerState({
  success: function(res) {
    var status = res.status
    var dataUrl = res.dataUrl
    var currentPosition = res.currentPosition
    var duration = res.duration
    var downloadPercent = res.downloadPercent
  }
})

wx.playBackgroundAudio({
  dataUrl: '',
  title: '',
  coverImgUrl: ''
})

wx.pauseBackgroundAudio()

wx.seekBackgroundAudio({
  position: 30
})

wx.stopBackgroundAudio()

wx.startRecord({
 success: function(res) {
  var tempFilePath = res.tempFilePath
  wx.saveFile({
   tempFilePath: tempFilePath,
   success: function(res) {
    var savedFilePath = res.savedFilePath
   }
  })
 }
})

wx.getSavedFileList({
 success: function(res) {
  console.log(res.fileList)
 }
})

wx.getSavedFileInfo({
 filePath: 'wxfile://somefile', //仅做示例用，非真正的文件路径
 success: function(res) {
  console.log(res.size)
  console.log(res.createTime)
 }
})

wx.getSavedFileList({
 success: function(res) {
  if (res.fileList.length > 0){
   wx.removeSavedFile({
    filePath: res.fileList[0].filePath,
    complete: function(res) {
     console.log(res)
    }
   })
  }
 }
})

wx.downloadFile({
 url: 'http://example.com/somefile.pdf',
 success: function (res) {
  var filePath = res.tempFilePath 
  wx.openDocument({
   filePath: filePath,
   success: function (res) {
    console.log('打开文档成功')
   }
  })
 }
})

<view class="container">
  <video src="{{src}}"></video>
  <button bindtap="bindButtonTap">获取视频</button>
</view>

Page({
  bindButtonTap: function() {
    var that = this
    wx.chooseVideo({
      sourceType: ['album','camera'],
      maxDuration: 60,
      camera: ['front','back'],
      success: function(res) {
        that.setData({
          src: res.tempFilePath
        })
      }
    })
  }
})

<!-- audio.wxml -->
<audio src="{{src}}" id="myAudio" ></audio>

<button type="primary" bindtap="audioPlay">播放</button>
<button type="primary" bindtap="audioPause">暂停</button>
<button type="primary" bindtap="audio14">设置当前播放时间为14秒</button>
<button type="primary" bindtap="audioStart">回到开头</button>

// audio.js
Page({
 onReady: function (e) {
  // 使用 wx.createAudioContext 获取 audio 上下文 context
  this.audioCtx = wx.createAudioContext('myAudio')
 },
 data: {
  src: 'http://ws.stream.qqmusic.qq.com/M500001VfvsJ21xFqb.mp3?guid=ffffffff82def4af4b12b3cd9337d5e7&uin=346897220&vkey=6292F51E1E384E06DCBDC9AB7C49FD713D632D313AC4858BACB8DDD29067D3C601481D36E62053BF8DFEAF74C0A5CCFADD6471160CAF3E6A&fromtag=46',
 },
 audioPlay: function () {
  this.audioCtx.play()
 },
 audioPause: function () {
  this.audioCtx.pause()
 },
 audio14: function () {
  this.audioCtx.seek(14)
 },
 audioStart: function () {
  this.audioCtx.seek(0)
 }
})

<view class="section tc">
 <video id="myVideo" src="http://wxsnsdy.tc.qq.com/105/20210/snsdyvideodownload?filekey=30280201010421301f0201690402534804102ca905ce620b1241b726bc41dcff44e00204012882540400&bizid=1023&hy=SH&fileparam=302c020101042530230204136ffd93020457e3c4ff02024ef202031e8d7f02030f42400204045a320a0201000400"  enable-danmu danmu-btn controls></video>
 <view class="btn-area">
  <input bindblur="bindInputBlur"/>
  <button bindtap="bindSendDanmu">发送弹幕</button>
 </view>
</view>

function getRandomColor () {
 let rgb = []
 for (let i = 0 ; i < 3; ++i){
  let color = Math.floor(Math.random() * 256).toString(16)
  color = color.length == 1 ? '0' + color : color
  rgb.push(color)
 }
 return '#' + rgb.join('')
}

Page({
 onReady: function (res) {
  this.videoContext = wx.createVideoContext('myVideo')
 },
 inputValue: '',
 bindInputBlur: function(e) {
  this.inputValue = e.detail.value
 },
 bindSendDanmu: function () {
  this.videoContext.sendDanmu({
   text: this.inputValue,
   color: getRandomColor()
  })
 }
})