HTML 文件有 4 个按钮，分别是录音、停止录音、播放、停止播放。代码如下所示。
<!DOCTYPE HTML>
<html>
<head>
<title>Cordova</title>
<script type="text/javascript" charset="utf-8" src="scripts/cordova-1.9.0.js"></script>
<script type="text/javascript" charset="utf-8" src="scripts/jquery-1.7.2.min.js"></script>
<script>
$(document).ready(function(){
$("#record").on("click", function(){
alert("record start");
window.plugins.VoicePlugin.record(function(){alert("yo");},
function(){alert("yol");},
"voice.3gp");
});
$("#stoprecord").on('click', function(){
alert("record stop");
window.plugins.VoicePlugin.stoprecord(function(){},
function(){},
"voice.3pg");
});
$("#play").on("click", function(){
alert("play");
window.plugins.VoicePlugin.play(function(){},
function(){},
"voice.3pg");
});
$("#stopplay").on("click", function(){
alert("stop play");
window.plugins.VoicePlugin.stopplay(function(){},
function(){},
"voice.3pg");
});
});
</script>
</head>
<body>
<button id="record">Start Recording</button>
<button id="stoprecord">Stop Recording</button>
<button id="play">Start Playing</button>
<button id="stopplay">Stop Playing</button>
</body>
</html>
Android 插件部分是
package com.saxoo.voice;
import java.io.IOException;
import org.apache.cordova.api.Plugin;
import org.apache.cordova.api.PluginResult;
import org.json.JSONArray;
import android.media.MediaPlayer;
import android.media.MediaRecorder;
import android.util.Log;
/**
* @author sbapp008
*
*/
public class VoicePlugin extends Plugin {
/* (non-Javadoc)
* @see org.apache.cordova.api.Plugin#execute(java.lang.String, org.json.JSONArray, java.lang.String)
*/
public static final String Record = "record";
public static final String Play = "play";
public static final String Stopplaying = "stopplaying";
public static final String Stoprecording = "stoprecording";
private static final String LOG_TAG = "AudioRecordTest";
private static String mFileName = null;
private static MediaRecorder mRecorder = null;
private static MediaPlayer mPlayer = null;
@Override
public PluginResult execute(String action, JSONArray data, String callbackId) {
PluginResult result = null;
if(Record.equals(action)){ //data에 filename
mRecorder = new MediaRecorder();
mRecorder.setAudioSource(MediaRecorder.AudioSource.MIC);
mRecorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP);
mRecorder.setOutputFile(mFileName);
mRecorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB);
try {
mRecorder.prepare();
} catch (IOException e) {
Log.e(LOG_TAG, "prepare() failed");
}
mRecorder.start();
} else if(Play.equals(action)){ //data에 filename
mPlayer = new MediaPlayer();
try {
mPlayer.setDataSource(mFileName);
mPlayer.prepare();
mPlayer.start();
} catch (IOException e) {
Log.e(LOG_TAG, "prepare() failed");
}
} else if(Stopplaying.equals(action)){
mPlayer.release();
mPlayer = null;
} else{
mRecorder.stop();
mRecorder.release();
mRecorder = null;
}
return null;
}
}
重点是，我应该停留在一个记录、停止记录、播放和停止播放语音的 Activity 中。如果我使用phonegap，因为它只是通过插件发送一些字符串，所以每次都会创建和销毁MediaRecorder和MediaPlayer对象。我按下 html 中的录制按钮，创建了 MediaRecorder 对象，但是按下停止录制按钮无法停止刚刚创建的 MediaRecorder 对象。这个问题有什么解决办法吗？
最佳答案
使用 Phonegap，我可以录制语音并播放录音，无需添加插件。 我只将 Phonegap Media 插件连接到我的应用程序，如下所示:
app/res/xml/config.xml
<plugin name="Media" value="org.apache.cordova.AudioHandler" />
app/AndroidManifest.xml
<uses-permission android:name="android.permission.RECORD_AUDIO" />
<uses-permission android:name="android.permission.MODIFY_AUDIO_SETTINGS" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
那里的代码:
<!DOCTYPE html>
<html>
<head>
<title></title>
<meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=no;" />
<meta charset="utf-8">
<script type="text/javascript" charset="utf-8" src="cordova-2.2.0.js"></script>
<script type="text/javascript" src="jquery-1.7.2.js"></script>
<script type="text/javascript">
var deviceready = false;
var mediaVar = null;
var recordFileName = "recording.wav";
function onBodyLoad()
{
document.addEventListener("deviceready", onDeviceReady, false);
deviceready = true;
}
$(document).ready(function(){
//validation to check if device is ready is skipped
$("#recordBtn").click(function(){
record();
});
$("#playBtn").click(function(){
play();
});
$("#stopBtn").click(function(){
stop();
});
});
function record()
{
if (mediaVar != null) {
mediaVar.release();
}
createMedia(function(){
status = "recording";
mediaVar.startRecord();
},onStatusChange);
}
function createMedia(onMediaCreated, mediaStatusCallback){
if (mediaVar != null) {
onMediaCreated();
return;
}
if (typeof mediaStatusCallback == 'undefined')
mediaStatusCallback = null;
mediaVar = new Media(recordFileName, function(){
log("Media created successfully");
}, onError, mediaStatusCallback);
onMediaCreated();
}
function stop()
{
if (mediaVar == null)
return;
if (status == 'recording')
{
mediaVar.stopRecord();
log("Recording stopped");
}
else if (status == 'playing')
{
mediaVar.stop();
log("Play stopped");
}
else
{
log("Nothing stopped");
}
status = 'stopped';
}
function play()
{
createMedia(function(){
status = "playing";
mediaVar = new Media('/sdcard/'+recordFileName, function(){
log("Media created successfully");
}, onError);
mediaVar.play();
});
}
function onStatusChange()
{
}
function onSuccess()
{
//do nothing
}
function onError(err)
{
if (typeof err.message != 'undefined')
err = err.message;
alert("Error : " + err);
}
function log(message)
{
console.info(message);
}
</script>
</head>
<body onload="onBodyLoad()">
Recorder<br>
<input type="button" name="recordBtn" id="recordBtn" value="Record">
<input type="button" name="stopBtn" id="stopBtn" value="Stop">
<input type="button" name="playBtn" id="playBtn" value="Play">
</body>
</html>
在 Android 设备上，PhoneGap 媒体对象具有以下未详细记录的重要行为 ( http://software.intel.com/en-us/articles/media-sample-using-phonegap#id_android ):
- "my_audio = new Media('myRecording100.wav', onMediaCallSuccess, onMediaCallError)”:当“myRecording100.wav”不存在时， 将创建文件；当它存在时，它会打开它。
- “my_audio.stopRecord()”:调用“stopRecord()”时，.wav
媒体文件被移动到“/sdcard”文件夹。所以当检查之前是否 录制的 .wav 存在，代码应在“/sdcard”文件夹下查找。如果 它确实存在，它应该从
打开文件 “/sdcard/myRecording100.wav”。
希望这对您有帮助。
关于javascript - 使用Phonegap，我想录制语音，停止录制，然后在Android中播放，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/11305129/