我有这个相机应用预览好，但每当我尝试录制它时，给我一个非法的感觉就像我的MediaRecorder没有正确设置但是确实如此。我必须注意，我正在使用模拟器来模拟前后凸轮。
package l33trus.com.shite
import android.content.Context;
import android.content.pm.PackageManager;
import android.hardware.Camera;
import android.hardware.Camera.CameraInfo;
import android.media.CamcorderProfile;
import android.media.MediaPlayer;
import android.media.MediaRecorder;
import android.os.Build;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.SurfaceHolder;
import android.view.SurfaceView;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.widget.ImageButton;
import android.widget.ImageView;
import android.widget.TextView;
import android.widget.Toast;
import java.io.IOException;
import java.util.Calendar;
public class VideoCapture extends Fragment implements OnClickListener, SurfaceHolder.Callback ,MediaRecorder.OnInfoListener,Camera.PictureCallback
{
public static final String LOGTAG = "VIDEOCAPTURE";
private static final int PICTURE_SIZE_MAX_WIDTH = 0;
String[] varNames; // for reflection function
private MediaRecorder recorder;
private MediaPlayer mp;
private SurfaceHolder holder;
int cameraCount = 0;
private CamcorderProfile camcorderProfile;
//final MediaPlayer interfaceSounds;
Cvars varPtr; // static global variable class
private ImageView isRecordingView;
private boolean photoMode; // if not in photo mode it's in video mode
private Camera camera;
private Camera.Size mPreviewSize;
private ImageButton recordButton;
private RawCallback rawCallback;
private SurfaceView cameraView;
CameraInfo cameraInfo = new CameraInfo();
private int resid = 0;
private int cameraId;
String fileExtension = ".mp4";
private boolean recording = false;
public static final int MEDIA_TYPE_IMAGE = 1;
public static final int MEDIA_TYPE_VIDEO = 2;
private View currentView;
private LayoutInflater inflateTmp;
private boolean usecamera = true;
private boolean previewRunning = false;
private boolean paused = false;
@Override
public void onSaveInstanceState(Bundle state)
{
super.onSaveInstanceState(state);
}
public VideoCapture()
{
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState)
{
View rootView = inflater.inflate(R.layout.videocapture, container, false);
recordButton = (ImageButton) rootView.findViewById(R.id.recordButton);
SurfaceView cameraView = (SurfaceView) rootView.findViewById(R.id.CameraView);
initRecorder();
holder = cameraView.getHolder();
holder.addCallback(this);
previewRunning = true;
if(Build.VERSION.SDK_INT < Build.VERSION_CODES.HONEYCOMB)
{
holder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
}
recordButton.setOnClickListener(this);
cameraView.setClickable(true);
cameraView.setOnClickListener(this);
this.currentView = rootView;
this.inflateTmp = inflater;
return rootView;
}
private void initRecorder()
{
recorder = new MediaRecorder();
recorder.setAudioSource(MediaRecorder.AudioSource.DEFAULT);
recorder.setVideoSource(MediaRecorder.VideoSource.DEFAULT);
CamcorderProfile cpHigh = CamcorderProfile.get(cameraInfo.facing,CamcorderProfile.QUALITY_HIGH);
recorder.setProfile(cpHigh);
String fileName = java.text.DateFormat.getDateTimeInstance().format(Calendar.getInstance().getTime());
recorder.setOutputFile(varPtr.DefaultStorageDir + fileName + ".mp4");
recorder.setMaxDuration(50000); // 50 seconds
}
private void prepareRecorder()
{
recorder.setPreviewDisplay(holder.getSurface());
try {
recorder.prepare();
} catch (IllegalStateException e) {
e.printStackTrace();
Toast toasty = Toast.makeText(this.getActivity(),"IllegalStateException prepareRecorder",Toast.LENGTH_LONG);
} catch (IOException e) {
e.printStackTrace();
Toast toasty = Toast.makeText(this.getActivity(),"IOException prepareRecorder",Toast.LENGTH_LONG);
}
}
public void onRecordStop() // handles manually stopping of the record and also called if it is closed when a tab or orientation is changed
{
recorder.stop();
recorder.release();
recording = false;
varPtr.recording = false;
isRecordingView.setImageResource(R.drawable.notrecordingimage);
recordButton.setImageResource(R.drawable.recording_button);
}
public void onRecordStart()
{
recording = true;
varPtr.recording = recording;
isRecordingView.setImageResource(R.drawable.recordingimage);
recordButton.setImageResource(R.drawable.record_stop_button);
}
@Override
public void onClick(View v)
{
switch (v.getId())
{
case R.id.recordButton:
if(photoMode)
{
//camera.takePicture(shutter,mPicture,new ImageCaptureCallback(this));
}
if (recording)
{
recorder.stop();
if (usecamera)
{
try {
camera.reconnect();
} catch (IOException e) {
e.printStackTrace();
}
}
recorder.release();
prepareRecorder();
}
else
{
onRecordStart();
recorder.start();
Log.v(LOGTAG, "Recording Started");
}
recording ^= true;
varPtr.recording = recording;
break;
case R.id.CameraView:
break;
case R.id.photoToggleButton:
photoMode ^= true;
break;
case R.id.videoToggleButton:
photoMode ^= true;
break;
}
}
private Camera getCameraInstance()
{
Camera c = null;
try {
c = Camera.open(); // attempt to get a Camera instance
} catch (Exception e) {
// Camera is not available (in use or does not exist)
}
return c;
}
private boolean checkCameraHardware(Context context)
{
if (context.getPackageManager().hasSystemFeature(PackageManager.FEATURE_CAMERA))
{
// this device has a camera
return true;
}
else
{
// no camera on this device
return false;
}
}
@Override
public void surfaceCreated(SurfaceHolder holder)
{
Log.v(LOGTAG, "surfaceCreated");
// configure(camera);
if(! checkCameraHardware(getActivity().getApplicationContext()))
{
getActivity().finish();
}
prepareRecorder();
try
{
camera.setPreviewDisplay(holder);
camera.startPreview();
previewRunning = true;
} catch (IOException e)
{
Log.e(LOGTAG,e.getMessage());
e.printStackTrace();
} catch (NullPointerException e)
{
Log.e("WTF","This sucks");
e.printStackTrace();
}
}
@Override
public void surfaceChanged(SurfaceHolder holder, int format, int width, int height)
{
Log.v(LOGTAG, "surfaceChanged");
if (!recording && usecamera)
{
try
{
Camera.Parameters p = camera.getParameters();
p.setPreviewSize(camcorderProfile.videoFrameWidth, camcorderProfile.videoFrameHeight);
p.setPreviewFrameRate(camcorderProfile.videoFrameRate);
camera.setParameters(p);
holder = cameraView.getHolder();
holder.addCallback(this);
camera.setPreviewDisplay(holder);
camera.startPreview();
previewRunning = true;
}
catch (IOException e)
{
Log.e(LOGTAG,e.getMessage());
e.printStackTrace();
}
catch(NullPointerException e)
{
Log.e("WTF","I hate my life");
e.printStackTrace();
}
prepareRecorder();
}
}
@Override
public void surfaceDestroyed(SurfaceHolder holder)
{
Log.v(LOGTAG, "surfaceDestroyed");
if (recording)
{
recorder.stop();
onRecordStop();
}
}
@Override
public void onPause()
{
super.onPause();
holder.removeCallback(this); //http://stackoverflow.com/questions/12411346/camera-is-null-when-the-surfacecreated-method-is-executed-for-second-time
camera.release();
}
@Override
public void onInfo(MediaRecorder mr, int what, int extra)
{
}
@Override
public void onPictureTaken(byte[] data, Camera camera)
{
}
}
这是logcat所说的
start called in an invalid state: 4
1762-1762/com.L33TRUS.shite D/AndroidRuntime﹕ Shutting down VM
1762-1762/com.L33TRUS.shite W/dalvikvm﹕ threadid=1: thread exiting with uncaught exception (group=0x409961f8)
1762-1762/com.L33TRUS.shite E/AndroidRuntime﹕ FATAL EXCEPTION: main
java.lang.IllegalStateException
at android.media.MediaRecorder.start(Native Method)
at l33trus.com.moment.Fragments.VideoCapture.onClick(VideoCapture.java:194)
答案 0 :(得分：0)
通过清理像这样的文件名来修复
fileName = fileName.replaceAll(":", "~");
fileName = fileName.replaceAll(",","");
fileName = fileName.replaceAll(" ","_");
还确保在通过mkdirs（）调用
打开文件之前创建了dirs