MediaRecorder始于一个1秒的延迟。我该如何摆脱沉默的？

问题描述

我想使用MediaRecorder的服务来录制声音。但是，它创建了一个1秒的延迟（沉默）在开始。如何我摆脱这种？我试图用<一个href="http://rehearsalassist.svn.sourceforge.net/viewvc/rehearsalassist/android/releases/RehearsalAssistant_0_8_2/src/urbanstew/RehearsalAssistant/RehearsalAudioRecorder.java?revision=90&view=markup"相对=nofollow> RehearsalAudioRecorder 仍然没有运气。如果任何人有固定前请咨询这个问题。

开始

 意图serviceIntent =新意图（）;
            serviceIntent.setAction（com.soundre coder.RecorderService）;
            serviceIntent.putExtra（的AudioFile，路径）;
            serviceIntent.putExtra（状态，真正的）;
            startService（serviceIntent）;
 

停止

 意图serviceIntent =新意图（）;
            serviceIntent.setAction（com.soundre coder.RecorderService）;
            serviceIntent.putExtra（国家，假）;
            startService（serviceIntent）;
 

RecorderService.java文件

 公共类RecorderService扩展服务
{
    私有静态最后字符串变量= NULL;
    私有静态MediaRecorder mRecorder;

    公共无效的onCreate（）{};

    公共无效ONSTART（意向意图，诠释startId）
    {
        布尔ISSTART = intent.getBooleanExtra（国家，假）;

        如果（ISSTART）{
            mRecorder =新MediaRecorder（）;
            mRecorder.setAudioSource（MediaRecorder.AudioSource.MIC）;
            mRecorder.setOutputFormat（MediaRecorder.OutputFormat.THREE_GPP）;
            mRecorder.setAudioEn codeR（MediaRecorder.AudioEn coder.AMR_NB）;
            mRecorder.setOutputFile（intent.getStringExtra（AUDIOFILE））;

            尝试 {
                mRecorder prepare（）。
            }赶上（IllegalStateException异常E）{
                Log.e（TAG，e.getMessage（））;
            }赶上（IOException异常E）{
                Log.e（TAG，e.getMessage（））;
            }
            尝试 {
                mRecorder.start（）;
            }
            赶上（IllegalStateException异常E）{
                Log.e（TAG，e.getMessage（））;
            }
        }

        否则，如果（！ISSTART）{
            mRecorder.stop（）;
            mRecorder.reset（）;
        }
    }

    @覆盖
    公众的IBinder onBind（意向意图）{
        返回null;
    }
}
 

解决方案

我发现与RehearsalAudioRecorder的解决方案

 公共无效ONSTART（意向意图，诠释startId）{
        布尔ISSTART = intent.getBooleanExtra（国家，假）;

        如果（ISSTART）{

            acquireWakeLock（）;

            INT I = 0;

            做 {
                如果（mRecorder！= NULL）
                    mRecorder.release（）;

                 mRecorder =新RehearsalAudioRecorder（假的，0，0，0，0）;

            }而（（+ I＆LT; 44100）
                    ＆放大器; ！（mRecorder.getState（）== RehearsalAudioRecorder.State.INITIALIZING））;

            mRecorder.setOutputFile（intent.getStringExtra（AUDIOFILE））;
            mRecorder prepare（）。
            mRecorder.start（）;

        }否则，如果（！ISSTART）{

            如果（mRecorder！= NULL）{
                mRecorder.stop（）;
                mRecorder.release（）;
                mRecorder = NULL;
            }

            releaseWakeLock（）;

        }
    }
 

I am trying to use MediaRecorder in a Service to record sounds. But it creates a 1 sec delay (silence) at the start. how to i get rid of this? I tried using RehearsalAudioRecorder still has no luck. If anyone has fixed this problem before please advice.

Start

Intent serviceIntent = new Intent();
            serviceIntent.setAction("com.soundrecoder.RecorderService");
            serviceIntent.putExtra("audioFile", path);
            serviceIntent.putExtra("state", true);
            startService(serviceIntent);

Stop

Intent serviceIntent = new Intent();
            serviceIntent.setAction("com.soundrecoder.RecorderService");
            serviceIntent.putExtra("state", false);
            startService(serviceIntent);

RecorderService.java file

public class RecorderService extends Service
{
    private static final String TAG = null;
    private static MediaRecorder mRecorder;

    public void onCreate() {};

    public void onStart(Intent intent, int startId)
    {
        boolean isStart = intent.getBooleanExtra("state", false);

        if (isStart) {
            mRecorder = new MediaRecorder();
            mRecorder.setAudioSource(MediaRecorder.AudioSource.MIC);
            mRecorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP);
            mRecorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB);
            mRecorder.setOutputFile(intent.getStringExtra("audioFile"));

            try {
                mRecorder.prepare();
            } catch (IllegalStateException e) {
                Log.e(TAG,e.getMessage());
            } catch (IOException e) {
                Log.e(TAG,e.getMessage());
            }
            try {
                mRecorder.start();
            }
            catch (IllegalStateException e) {
                Log.e(TAG, e.getMessage());
            }
        }

        else if (!isStart) {
            mRecorder.stop();
            mRecorder.reset();
        }
    }

    @Override
    public IBinder onBind(Intent intent) {
        return null;
    }
}

解决方案

I found a solution with the RehearsalAudioRecorder

public void onStart(Intent intent, int startId) {
        boolean isStart = intent.getBooleanExtra("state", false);

        if (isStart) {

            acquireWakeLock();

            int i = 0;

            do {
                if (mRecorder != null)
                    mRecorder.release();

                 mRecorder = new RehearsalAudioRecorder(false, 0, 0, 0, 0);

            } while ((++i < 44100)
                    & !(mRecorder.getState() == RehearsalAudioRecorder.State.INITIALIZING));

            mRecorder.setOutputFile(intent.getStringExtra("audioFile"));
            mRecorder.prepare();
            mRecorder.start();

        } else if (!isStart) {

            if(mRecorder != null) {
                mRecorder.stop();
                mRecorder.release();
                mRecorder = null;
            }

            releaseWakeLock();

        }
    }

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