如何录制音频？

我正在尝试使用以下代码录制音频。如何录制音频？

当我打电话开始记录其工作正常。

但是，当我呼吁停止recod录制它会抛出错误消息像下游。

.............................................................. 

11-14 18:03:28.361: V/tag(23349): outgoing call ended 
11-14 18:03:28.361: V/tag(23349): [email protected] 
11-14 18:03:28.371: E/MediaRecorder(23349): stop called in an invalid state: 1 
11-14 18:03:28.371: D/AndroidRuntime(23349): Shutting down VM 
11-14 18:03:28.371: W/dalvikvm(23349): threadid=1: thread exiting with uncaught  exception (group=0x40015560) 
11-14 18:03:28.381: E/AndroidRuntime(23349): FATAL EXCEPTION: main 
11-14 18:03:28.381: E/AndroidRuntime(23349): java.lang.RuntimeException: Unable to start receiver com.example.Audio.CallsBrodcastReceiver: java.lang.IllegalStateException 
11-14 18:03:28.381: E/AndroidRuntime(23349): at android.app.ActivityThread.handleReceiver(ActivityThread.java:1805) 
11-14 18:03:28.381: E/AndroidRuntime(23349): at android.app.ActivityThread.access$2400(ActivityThread.java:117) 
11-14 18:03:28.381: E/AndroidRuntime(23349): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:981) 
11-14 18:03:28.381: E/AndroidRuntime(23349): at android.os.Handler.dispatchMessage(Handler.java:99) 
11-14 18:03:28.381: E/AndroidRuntime(23349): at android.os.Looper.loop(Looper.java:123) 
11-14 18:03:28.381: E/AndroidRuntime(23349): at android.app.ActivityThread.main(ActivityThread.java:3683) 
11-14 18:03:28.381: E/AndroidRuntime(23349): at java.lang.reflect.Method.invokeNative(Native Method) 
11-14 18:03:28.381: E/AndroidRuntime(23349): at java.lang.reflect.Method.invoke(Method.java:507) 
11-14 18:03:28.381: E/AndroidRuntime(23349): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839) 
11-14 18:03:28.381: E/AndroidRuntime(23349): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597) 
11-14 18:03:28.381: E/AndroidRuntime(23349): at dalvik.system.NativeStart.main(Native Method) 
11-14 18:03:28.381: E/AndroidRuntime(23349): Caused by: java.lang.IllegalStateException 
11-14 18:03:28.381: E/AndroidRuntime(23349): at android.media.MediaRecorder.stop(Native Method) 
11-14 18:03:28.381: E/AndroidRuntime(23349): at com.example.Audio.AudioRecorder.stop(AudioRecorder.java:64) 
11-14 18:03:28.381: E/AndroidRuntime(23349): at com.example.Audio.CallsBrodcastReceiver.onReceive(CallsBrodcastReceiver.java:147) 
11-14 18:03:28.381: E/AndroidRuntime(23349): at android.app.ActivityThread.handleReceiver(ActivityThread.java:1794) 
11-14 18:03:28.381: E/AndroidRuntime(23349): ... 10 more

如果有人知道解决方案请帮帮我。

在此先感谢。

来源

2012-11-14 kiran

在try n catch block中添加停止条件..您可能会以错误的状态调用。切出。 –

try this code for start and stop recording of sounds in android. 

public class SoundRecordingActivity extends Activity { 

    MediaRecorder recorder; 
    File audiofile = null; 
    private static final String TAG = "SoundRecordingActivity"; 
    private View startButton; 
    private View stopButton; 

    @Override 
    public void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.main); 
     startButton = findViewById(R.id.start); 
     stopButton = findViewById(R.id.stop); 
    } 

    public void startRecording(View view) throws IOException { 

     startButton.setEnabled(false); 
     stopButton.setEnabled(true); 

     File sampleDir = Environment.getExternalStorageDirectory(); 
     try { 
      audiofile = File.createTempFile("sound", ".3gp", sampleDir); 
     } catch (IOException e) { 
      Log.e(TAG, "sdcard access error"); 
      return; 
     } 
     recorder = new MediaRecorder(); 
     recorder.setAudioSource(MediaRecorder.AudioSource.MIC); 
     recorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP); 
     recorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB); 
     recorder.setOutputFile(audiofile.getAbsolutePath()); 
     recorder.prepare(); 
     recorder.start(); 
    } 

    public void stopRecording(View view) { 
     startButton.setEnabled(true); 
     stopButton.setEnabled(false); 
     recorder.stop(); 
     recorder.release(); 
     addRecordingToMediaLibrary(); 
    } 

    protected void addRecordingToMediaLibrary() { 
     ContentValues values = new ContentValues(4); 
     long current = System.currentTimeMillis(); 
     values.put(MediaStore.Audio.Media.TITLE, "audio" + audiofile.getName()); 
     values.put(MediaStore.Audio.Media.DATE_ADDED, (int) (current/1000)); 
     values.put(MediaStore.Audio.Media.MIME_TYPE, "audio/3gpp"); 
     values.put(MediaStore.Audio.Media.DATA, audiofile.getAbsolutePath()); 
     ContentResolver contentResolver = getContentResolver(); 

     Uri base = MediaStore.Audio.Media.EXTERNAL_CONTENT_URI; 
     Uri newUri = contentResolver.insert(base, values); 

     sendBroadcast(new Intent(Intent.ACTION_MEDIA_SCANNER_SCAN_FILE, newUri)); 
     Toast.makeText(this, "Added File " + newUri, Toast.LENGTH_LONG).show(); 
    } 
} 

<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/> 
    <uses-permission android:name="android.permission.RECORD_AUDIO" /> 
Add this permissions in Manifest And Let me know the status?

来源

2012-11-14 12:35:31

如何录制音频？

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