如何使用cordova媒体插件在android中暂停和恢复录音

Question

我在 Visual Studio 中使用 angularjs。使用 cordova 媒体插件 startRecord() 和 stopRecord() 正在工作，但无法暂停和恢复录制。我没有使用媒体捕获插件，因为我没有默认记录器已安装。

这是我的代码：

var audurl = '///storage/emulated/0/New/';
audurl += 'Voice_' + '.amr';
var mediaRec;
function recordAudio() {
  mediaRec = new Media(audurl, onSuccess, onError);
  mediaRec.startRecord();
}
function pauseAudio() {
  mediaRec = new Media(audurl, onSuccess, onError);
  mediaRec.pauseRecord();
}

谢谢...

Answer 1

在我的手机上，方法 media.resumeRecord 不可用，尽管在这个 soure-code 中定义了它。不过，您可以利用所有其他方法（例如 startRecord 和 stopRecord）来重建一种 resumeRecord 函数，就像在下面的处理程序中完成的那样：

var myRecordHandler = function () {

  // ALL RECORDED FILES ARE SAVED IN THIS ARRAY
  var recordedAudioFiles = [];

  // REMEMBER POSITION WHEN PLAYING IS STOPPED
  var currentPosition = {index:0,shift:0};

  // PAUSE-MODE
  var paused = false;

  // SET A SPECIFC DIRECTORY WHERE THE FILES ARE STORED INTO
  // DEFAULT: ''
  this.setDirectory = function(dir) {this.dir=dir;};

  // SET FILENAME
  // DEFAULT: recoredFilesX
  this.setFilename = function(filename) {this.filename=filename;};

  // SET MIME/Type of THE FILES; 
  // DEFAULT: mp3
  this.setFileType = function(type) {this.filetype=type;};

  // GET ALL RECORED FILES 
  this.getAllFiles = function() {return recordedAudioFiles;};

  // STOP/PAUSE RECORDED FILES
  var handleRecordedFileHold = function () {
    for (var r = 0; r < recordedAudioFiles.length; r++) {

      var recordedAudioFile = recordedAudioFiles[r];

      if(recordedAudioFile.isBeingRecorded){
         if(paused)recordedAudioFile.media.pause();
         else recordedAudioFile.media.stop();
         continue;
      }

      recordedAudioFile.duration = new Date().getTime() - recordedAudioFile.startTime;
      // call release to free this created file so that it could get deleted for instance
      recordedAudioFile.media.stopRecord();
      recordedAudioFile.media.release();
      recordedAudioFile.isBeingRecorded = true;
    }
  } 

  // START RECORDING
  this.startAudioRecording = function() {

    paused = false;
    handleRecordedFileHold();

    var dir = this.dir ? this.dir : '';
    var filename = this.filename ? this.filename : 'recoredFiles';
    var type = this.filetype ? this.filetype : 'mp3';

    var src = dir + filename + (recordedAudioFiles.length + 1) + '.' + type;
    var mediaRec = new Media(src, 
       function () {
         console.log('recordAudio():Audio Success');
       }, 
       function (err) {
         console.log('recordAudio():Audio Error: ' + err.code);
    });
    recordedAudioFiles.push({
      media: mediaRec,
      startTime: new Date().getTime()
    });
    mediaRec.startRecord();
  } 

  // PAUSE RECORDING
  this.pauseRecoredFiles = function () {
    if(recordedAudioFiles.length){
       paused = true;
       clearTimeout(currentPosition.timeout);
       handleRecordedFileHold();
       var recoredMedia = recordedAudioFiles[currentPosition.index].media;
       recoredMedia.getCurrentPosition(
           function (position) {
              currentPosition.shift = position;
           },
           function (e) {
              console.log("Error getting pos=" + e);
           }
       );
    }
  } 

  // PLAY RECORD
  this.playRecordedFiles = function () {
    handleRecordedFileHold();
    var playNextFile = function () {
      var recoredMedia = recordedAudioFiles[currentPosition.index];
      if (recoredMedia) {
        if(paused){
          recoredMedia.media.seekTo(currentPosition.shift*1000);
          paused = false;
        }
        recoredMedia.media.play();
        currentPosition.timeout = setTimeout(function () {
          currentPosition.index++;
          recoredMedia.media.stop();
          playNextFile();
        }, recoredMedia.duration ? recoredMedia.duration : 0);
      }
      else{
        paused = false;
        currentPosition.index = currentPosition.shift = 0;
      }
    };
    playNextFile();
  } 

  // RESET PLAY
  this.stopRecordedFiles = function () {
    currentPosition.index = currentPosition.shift = 0;
    clearTimeout(currentPosition.timeout);
    handleRecordedFileHold();
  }

  // REMOVE ALL RECORDED FILES 
  this.removeRecordedFiles = function() {
    paused = false;
    currentPosition.index = currentPosition.shift = 0;
    clearTimeout(currentPosition.timeout);
    handleRecordedFileHold();
    recordedAudioFiles = [];
  }

};

var handler = new myRecordHandler();

// you can use this handler in your functions like this:
function recordAudio() {
  // records one track and stops former track if there is one
  handler.startAudioRecording();
}

function playAudio() {
  handler.playRecordedFiles();
}

function pauseAudio() {
  handler.pauseRecoredFiles();
}

function resumeAudio() {
  pauseAudio();
  recordAudio();
}

function stopAudio() {
  handler.stopRecordedFiles();
}

---

虽然我无法测试您的目录/文件名，因为我没有在我的手机上创建此目录，但这些方法可能会帮助您将文件存储在特定目录中以及使用某些文件名：

handler.setDirectory('__YOUR_DIR__');

handler.setFilename('__YOUR_FILENAME__');

handler.setFileType('__YOUR_FILETYPE__');