java中初始化MediaRecorder的实现方法

java中初始化mediarecorder

实现代码：

private boolean initializevideo() {  
    log.v(tag, "initializevideo");  
     
    if (msurfaceholder == null) {  
      log.v(tag, "surfaceholder is null");  
      return false;  
    }  
 
    mmediarecorderrecording = true;  
 
    if (mmediarecorder == null)  
        mmediarecorder = new mediarecorder();  
    else 
        mmediarecorder.reset();  
    if (mcamera != null) {  
        if (integer.parseint(build.version.sdk) >= 8)  
            videocameranew2.reconnect(mcamera);  
        mcamera.release();  
        mcamera = null;  
    }  
 
    if (usefront && integer.parseint(build.version.sdk) >= 5) {  
            if (isavailablesprintffc)  
            {  
                try 
                {  
                    method method = class.forname("android.hardware.htcfrontfacingcamera").getdeclaredmethod("getcamera", null);  
                    mcamera = (camera) method.invoke(null, null);  
                }  
                catch (exception ex)  
                {  
                    log.d(tag, ex.tostring());  
                }  
            } else {  
                mcamera = camera.open();  
                camera.parameters parameters = mcamera.getparameters();  
                parameters.set("camera-id", 2);  
                mcamera.setparameters(parameters);  
            }  
            videocameranew.unlock(mcamera);  
            mmediarecorder.setcamera(mcamera);  
        mvideopreview.setonclicklistener(this);  
    }  
    mvideopreview.setonlongclicklistener(this);  
    mmediarecorder.setvideosource(mediarecorder.videosource.camera);  
    mmediarecorder.setoutputformat(mediarecorder.outputformat.three_gpp);  
    mmediarecorder.setoutputfile(sender.getfiledescriptor());  
 
        mmediarecorder.setvideoframerate(20);  
    if (videoqualityhigh) {  
      mmediarecorder.setvideosize(352,288);  
    } else {  
      mmediarecorder.setvideosize(176,144);  
    }  
    mmediarecorder.setvideoencoder(mediarecorder.videoencoder.h263);  
    mmediarecorder.setpreviewdisplay(msurfaceholder.getsurface());  
 
    try {  
      mmediarecorder.prepare();  
      mmediarecorder.setonerrorlistener(this);  
      mmediarecorder.start();  
    } catch (ioexception exception) {  
      releasemediarecorder();  
      finish();  
      return false;  
    }  
    return true;  
  } 

private boolean initializevideo() { 
    log.v(tag, "initializevideo"); 
     
    if (msurfaceholder == null) { 
      log.v(tag, "surfaceholder is null"); 
      return false; 
    } 
 
    mmediarecorderrecording = true; 
 
    if (mmediarecorder == null) 
        mmediarecorder = new mediarecorder(); 
    else 
        mmediarecorder.reset(); 
    if (mcamera != null) { 
        if (integer.parseint(build.version.sdk) >= 8) 
            videocameranew2.reconnect(mcamera); 
        mcamera.release(); 
        mcamera = null; 
    } 
 
    if (usefront && integer.parseint(build.version.sdk) >= 5) { 
            if (isavailablesprintffc) 
            { 
                try 
                { 
                    method method = class.forname("android.hardware.htcfrontfacingcamera").getdeclaredmethod("getcamera", null); 
                    mcamera = (camera) method.invoke(null, null); 
                } 
                catch (exception ex) 
                { 
                    log.d(tag, ex.tostring()); 
                } 
            } else { 
                mcamera = camera.open();  
                camera.parameters parameters = mcamera.getparameters();  
                parameters.set("camera-id", 2);  
                mcamera.setparameters(parameters);  
            } 
            videocameranew.unlock(mcamera); 
            mmediarecorder.setcamera(mcamera); 
        mvideopreview.setonclicklistener(this); 
    } 
    mvideopreview.setonlongclicklistener(this); 
    mmediarecorder.setvideosource(mediarecorder.videosource.camera); 
    mmediarecorder.setoutputformat(mediarecorder.outputformat.three_gpp); 
    mmediarecorder.setoutputfile(sender.getfiledescriptor()); 
 
        mmediarecorder.setvideoframerate(20); 
    if (videoqualityhigh) { 
      mmediarecorder.setvideosize(352,288); 
    } else { 
      mmediarecorder.setvideosize(176,144); 
    } 
    mmediarecorder.setvideoencoder(mediarecorder.videoencoder.h263); 
    mmediarecorder.setpreviewdisplay(msurfaceholder.getsurface()); 
 
    try { 
      mmediarecorder.prepare(); 
      mmediarecorder.setonerrorlistener(this); 
      mmediarecorder.start(); 
    } catch (ioexception exception) { 
      releasemediarecorder(); 
      finish(); 
      return false; 
    } 
    return true; 
  } 
 

private void releasemediarecorder() {  
    log.v(tag, "releasing media recorder.");  
    if (mmediarecorder != null) {  
      mmediarecorder.reset();  
      if (mcamera != null) {  
            if (integer.parseint(build.version.sdk) >= 8)  
                videocameranew2.reconnect(mcamera);  
            mcamera.release();  
            mcamera = null;  
      }  
      mmediarecorder.release();  
      mmediarecorder = null;  
    }  
  }  
      
  public void onerror(mediarecorder mr, int what, int extra) {  
    if (what == mediarecorder.media_recorder_error_unknown) {  
      finish();  
    }  
  } 

private void releasemediarecorder() { 
    log.v(tag, "releasing media recorder."); 
    if (mmediarecorder != null) { 
      mmediarecorder.reset(); 
      if (mcamera != null) { 
            if (integer.parseint(build.version.sdk) >= 8) 
                videocameranew2.reconnect(mcamera); 
            mcamera.release(); 
            mcamera = null; 
      } 
      mmediarecorder.release(); 
      mmediarecorder = null; 
    } 
  } 
     
  public void onerror(mediarecorder mr, int what, int extra) { 
    if (what == mediarecorder.media_recorder_error_unknown) { 
      finish(); 
    } 
  } 
 

private void stopvideorecording() {  
    log.v(tag, "stopvideorecording");  
    if (mmediarecorderrecording || mmediarecorder != null) {  
        receiver.listener_video = null;  
        t.interrupt();  
      rtpstreamsender.delay = 0;  
 
      if (mmediarecorderrecording && mmediarecorder != null) {  
        try {  
          mmediarecorder.setonerrorlistener(null);  
          mmediarecorder.setoninfolistener(null);  
          mmediarecorder.stop();  
        } catch (runtimeexception e) {  
          log.e(tag, "stop fail: " + e.getmessage());  
        }  
 
        mmediarecorderrecording = false;  
      }  
      releasemediarecorder();  
    }  
  } 

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