android录音机应用程序

概述我想在 android 3.0中创建一个录音机应用程序.场景是当我点击录制按钮时它必须开始录制,当我点击停止按钮时它必须停止录制. 录制语音后我想点击播放按钮播放录制的声音.当我点击停止播放按钮时它必须停止播放.我曾尝试过录制语音的代码.但它以3gpp格式存储文件.所以它不是在ma设备上播放.所以我试图将outputformat更改为’AMR_NB’.但是当我点击停止按钮时它会崩溃.任何人都可以提 我想在 android 3.0中创建一个录音机应用程序.场景是当我点击录制按钮时它必须开始录制,当我点击停止按钮时它必须停止录制.

录制语音后我想点击播放按钮播放录制的声音.当我点击停止播放按钮时它必须停止播放.我曾尝试过录制语音的代码.但它以3gpp格式存储文件.所以它不是在ma设备上播放.所以我试图将outputformat更改为’AMR_NB’.但是当我点击停止按钮时它会崩溃.任何人都可以提供代码,否则PLZ帮助我通过编辑我的代码使其工作.@H_404_10@这是我的助手班……

public class AudioRecorder {final MediaRecorder recorder = new MediaRecorder();  final String path;  /**   * Creates a new audio recording at the given path (relative to root of SD card).   */  public AudioRecorder(String path) {    this.path = sanitizePath(path);  }  private String sanitizePath(String path) {    if (!path.startsWith("/")) {      path = "/" + path;    }    if (!path.contains(".")) {      path += ".3gp";    }    return Environment.getExternalStorageDirectory().getabsolutePath() + path;  }  /**   * Starts a new recording.   */  public voID start() throws IOException {    String state = androID.os.Environment.getExternalStorageState();    if(!state.equals(androID.os.Environment.MEDIA_MOUNTED))  {        throw new IOException("SD Card is not mounted.  It is " + state + ".");    }    // make sure the directory we plan to store the recording in exists    file directory = new file(path).getParentfile();    if (!directory.exists() && !directory.mkdirs()) {      throw new IOException("Path to file Could not be created.");    }    recorder.setAudioSource(MediaRecorder.AudioSource.MIC);    recorder.setoutputFormat(MediaRecorder.OutputFormat.AMR_NB);    recorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB);    recorder.setoutputfile(path);    recorder.prepare();    recorder.start();  }  /**   * Stops a recording that has been prevIoUsly started.   */  public voID stop() throws IOException {    recorder.stop();    recorder.release();  }}

这是我的活动课

public class audiorecording extends Activity {private button start;private button stop;/** Called when the activity is first created. */@OverrIDepublic voID onCreate(Bundle savedInstanceState) {    super.onCreate(savedInstanceState);    setContentVIEw(R.layout.main);    start=(button)findVIEwByID(R.ID.start);    stop=(button)findVIEwByID(R.ID.stop);    final AudioRecorder recorder = new AudioRecorder("/audiometer/temp");    start.setonClickListener(new OnClickListener() {        public voID onClick(VIEw v) {             try {                    recorder.start();                } catch (IOException e) {                    // Todo auto-generated catch block                    e.printstacktrace();                }        }    })  ;           //….wait a while        stop.setonClickListener(new OnClickListener() {            public voID onClick(VIEw v) {                try {                    recorder.stop();                } catch (IOException e) {                    // Todo auto-generated catch block                    e.printstacktrace();                }            }        })  ;    }}

解决方法 你可以使用 setOutputFormat (int output_format)

Sets the format of the output file produced during recording. Call this after setAudioSource()/setVIDeoSource() but before prepare().@H_404_10@ It is recommended to always use 3GP format when using the H.263 vIDeo encoder and AMR audio encoder. Using an MPEG-4 container format may confuse some desktop players.

Audalyzer适用于AndroID的音频分析仪

This is a simple audio analyser for AndroID. It displays sound readings from the microphone as a waveform display,as a frequency spectrum,and as a dB meter. dB levels are relative to the maximum input level of your device.

Android MediaRecorder

使用MediaRecorder录制音频的常见情况如下：

MediaRecorder recorder = new MediaRecorder(); recorder.setAudioSource(MediaRecorder.AudioSource.MIC); recorder.setoutputFormat(MediaRecorder.OutputFormat.THREE_GPP); recorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB); recorder.setoutputfile(PATH_name); recorder.prepare(); recorder.start();   // Recording is Now started ... recorder.stop(); recorder.reset();   // You can reuse the object by going back to setAudioSource() step recorder.release(); // Now the object cannot be reused

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