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@hyman 还是空指针的问题

我认真的排查过，mMediaRECORDER只有release（）里置空过

package com.imoc_recorder.view;
 
import java.io.File;
import java.io.IOException;
import java.util.UUID;
 
import android.R.integer;
import android.media.MediaRecorder;
import android.util.Log;
 
public class AudioManager {
     
    private MediaRecorder mMediaRecorder;
    private String mDir;
    private String mCurrentFilePath;
    private boolean isPrepared;
     
    private static AudioManager mInstance;
    private AudioManager(String dir){
        mDir = dir;
    }
    /*
     * 回调准备完毕
     */
    public  interface AudioStateListener {
        void wellPrepared();
    }
     
    public AudioStateListener mListener;
     
    public void  setOnAudioStateListener(AudioStateListener listener) {
        mListener = listener;
    }
    public static  AudioManager getInstance(String dir) {
        if (mInstance == null) {
            synchronized (AudioManager.class) {
                if (mInstance == null) {
                    mInstance = new AudioManager(dir);
                }
            }
        }
        return mInstance;
    }
     
    //准备
    public void  prepareAudio() {
        try {
            isPrepared = false;
             
            File dir = new File(mDir);
            if (!dir.exists()) {
                dir.mkdirs();
                 
                String fileName = generateFileName();
                File file = new File(dir,fileName);
                mCurrentFilePath = file.getAbsolutePath();
                 
                mMediaRecorder = new MediaRecorder();
                //设置输出文件
                mMediaRecorder.setOutputFile(file.getAbsolutePath());
                //设置MediaRecorder的音频源为麦克风
                mMediaRecorder.setAudioSource(MediaRecorder.AudioSource.MIC);
                //设置音频的格式
                mMediaRecorder.setOutputFormat(MediaRecorder.OutputFormat.RAW_AMR);
                //设置音频编码为amr
                mMediaRecorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB);
                mMediaRecorder.prepare();
                mMediaRecorder.start();
                isPrepared = true;
     
                if (mListener != null) {
                    mListener.wellPrepared();
                }
            }
        } catch (Exception e) {
             
            e.printStackTrace();
        }
    }
    //随机生成文件名
    private String generateFileName() {
        return UUID.randomUUID().toString()+".amr";
    }
 
    public int getVoiceLevel(int maxLevel) {
        if(isPrepared)
        {
            try {
                return maxLevel*mMediaRecorder.getMaxAmplitude()/32768+1; //音频的最大振幅1！32767～1
            } catch (Exception e) {
             
                e.printStackTrace();
            }
        }
        return 1;
    }
     
    public void release() {
        mMediaRecorder.stop();
        mMediaRecorder.release();
//        mMediaRecorder = null;
    }
    public void cancel() {
        release();
        if (mCurrentFilePath != null) {
            File file = new File(mCurrentFilePath);
            file.delete();
            mCurrentFilePath = null;
        }
    }
    public String getCurrentFilePath() {
        return mCurrentFilePath;
    }
 
     
}

niebiao

2015-05-13

源自：Android-仿微信语音聊天

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3 回答

hyman
2015-05-13

那怎么会空呢~~记得拿真机测试~~

0 回复有任何疑惑可以回复我~

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Elmundo
2015-07-10

我这边也是报setAudioFinishRecorderListener空指针

0 回复有任何疑惑可以回复我~

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niebiao 提问者
2015-05-13

我就是在真机测试的有这个错误，换了虚拟机测试了还是同样的错误？？？？？

import com.example.imoc_recorder.R;
import com.imoc_recorder.view.AudioManager.AudioStateListener;

import android.R.integer;
import android.content.Context;
import android.os.Environment;
import android.os.Handler;
import android.util.AttributeSet;
import android.util.Log;
import android.view.MotionEvent;
import android.view.View;
import android.widget.Button;

public class AudioRecorderButton extends Button implements AudioStateListener {

   private final int DISTANCE_Y_CANCEL = 50; //y方向的移动距离
   private static final int STATE_NORNMAL =1;
   private static final int STATE_RECORDING =2;
   private static final int STATE_WANT_TO_CANCEL =3;

   private int mCurState = STATE_NORNMAL;
   private boolean isRecording=false; //已经开始录音

   private DailogManager mDailogManager;

   private AudioManager mAudioManager;

   private float mTime=0;
   //是否触发longclick
   private boolean mReady;

   public AudioRecorderButton(Context context) {
       this(context,null);
   }
   public AudioRecorderButton(Context context, AttributeSet attrs) {
       super(context, attrs);

       mDailogManager = new DailogManager(getContext());
       setOnLongClickListener(new OnLongClickListener() {

           @Override
           public boolean onLongClick(View v) {
               mReady = true;
               mAudioManager.prepareAudio();
               return false;
           }
       });

       String dir = Environment.getExternalStorageDirectory()+"/imooc_recorder_audios";
       mAudioManager = AudioManager.getInstance(dir);
       mAudioManager.setOnAudioStateListener(this); //注册回调

           }

   //录音完成后的回调
   public interface AudioFinishRecorderListener {
       void onFinished(float seconds,String filePath);
   }

   private AudioFinishRecorderListener mListener;

   public void setAudioFinishRecorderListener(AudioFinishRecorderListener listener) {
       mListener = listener;
   }

   @Override
   public void wellPrepared() {
       mHandler.sendEmptyMessage(MSG_AUDIO_PREPARED);
   }
   /*
   * 获取音量大小
   */
   private Runnable mGetVoiceLevelRunnable=new Runnable() {

       @Override
       public void run() {
           while (isRecording) {

                   try {
                       Thread.sleep(100);
                       mTime+=0.1f;
                       mHandler.sendEmptyMessage(MSG_VOICE_CHANGE);
                   } catch (InterruptedException e) {
                       // TODO Auto-generated catch block
                       e.printStackTrace();
                   }


           }
       }
   };

   private static final int MSG_AUDIO_PREPARED = 0X110;
   private static final int MSG_VOICE_CHANGE = 0X111;
   private static final int MSG_DIALOG_DIMISS = 0X112;

   private Handler mHandler = new Handler()
   {


       public void handleMessage(android.os.Message msg) {
           switch (msg.what) {
           case MSG_AUDIO_PREPARED:
               // 正真显示dialog在audio end prepared以后
               mDailogManager.showRecordingDialog();
               isRecording = true;
               //开启线程获取音量
               new Thread(mGetVoiceLevelRunnable).start();
               break;
           case MSG_VOICE_CHANGE:
               mDailogManager.updateVoiceLevel(mAudioManager.getVoiceLevel(7));
               break;
           case MSG_DIALOG_DIMISS:
               mDailogManager.dimissDialog();
               break;
           }
       };
   };
   @Override
   public boolean onTouchEvent(MotionEvent event) {
       int action = event.getAction();
       int x = (int) event.getX();
       int y = (int) event.getY();

//       try {
           switch (action) {
           case MotionEvent.ACTION_DOWN:
               changeState(STATE_RECORDING);
               break;

           case MotionEvent.ACTION_MOVE:
               if (isRecording) {
                   if (wantToCancel(x,y)) {
                       changeState(STATE_WANT_TO_CANCEL);
                   }else {
                       changeState(STATE_RECORDING);
                   }
               }
               break;
           case MotionEvent.ACTION_UP:
               if (!mReady) {
                   reset();
                   return super.onTouchEvent(event);
               }
               if (!isRecording||mTime<0.6f) {//时间短，还没有来得及repared
                   mDailogManager.tooShort();
                   mAudioManager.cancel();
                   mHandler.sendEmptyMessageDelayed(MSG_DIALOG_DIMISS, 1300);//1.3秒后关闭tooshort
               }else   if (mCurState==STATE_RECORDING) {//正常录制结束
                   //release
                   mDailogManager.dimissDialog();
                   mAudioManager.release();
                   //callbackToAct
                   if (mListener != null) {
                       mListener.onFinished(mTime, mAudioManager.getCurrentFilePath());
                   }
               }else if (mCurState==STATE_WANT_TO_CANCEL) {
                   //cancel
                   mDailogManager.dimissDialog();
                   mAudioManager.cancel();
               }
               reset();
               break;
           }
//       } catch (Exception e) {
//           System.out.println("1111111111111111111111111111");
//           e.printStackTrace();
//       }

       return super.onTouchEvent(event);

   }
       //恢复标志位
   private void reset() {

       isRecording = false;
       changeState(STATE_NORNMAL);
       mTime = 0;
       mReady = false;
   }
   private boolean wantToCancel(int x, int y) {
       if (x<0 || x>getWidth()) {
           return true ;
       }
       if(y<-DISTANCE_Y_CANCEL || y>getHeight()+DISTANCE_Y_CANCEL)
       {
           return true;
       }
       return false;
   }
   private void changeState(int state) {//state是将要边车的状态
       if (mCurState!=state) {
           mCurState = state;
           switch (state) {
           case STATE_NORNMAL:
               setBackgroundResource(R.drawable.btn_recorder_normal);
               setText(R.string.str_recorder_normal);
               break;
           case STATE_RECORDING:
               setBackgroundResource(R.drawable. btn_recording);
               setText(R.string.str_recorder_recording);
               if (isRecording) {

                   mDailogManager.recording();
               }
               break;
           case STATE_WANT_TO_CANCEL:
               setBackgroundResource(R.drawable.btn_recording);
               setText(R.string.str_recorder_cancel);

               mDailogManager.wantToCancel();
               break;
           }
       }
   }



}