我正在制作一个应用程序，用户可以在其中通过定制的相机录制视频。用户还可以通过前置摄像头录制视频。它录制得很好，但是当我们在普通媒体播放器中播放它时，它只是在 180 度播放。我不知道这怎么可能以及如何解决？请向我建议任何有关相同的解决方案。
代码：
package com.irantapps.cameraApplication;
import java.io.File;
import java.io.IOException;
import android.annotation.SuppressLint;
import android.app.AlertDialog;
import android.content.Context;
import android.content.DialogInterface;
import android.content.Intent;
import android.database.Cursor;
import android.hardware.Camera;
import android.media.ExifInterface;
import android.media.MediaPlayer;
import android.media.MediaRecorder;
import android.media.MediaRecorder.VideoEncoder;
import android.net.Uri;
import android.os.Bundle;
import android.os.Environment;
import android.os.SystemClock;
import android.provider.MediaStore;
import android.util.Log;
import android.view.KeyEvent;
import android.view.Surface;
import android.view.SurfaceHolder;
import android.view.SurfaceView;
import android.view.View;
import android.view.Window;
import android.view.animation.AlphaAnimation;
import android.view.animation.Animation;
import android.view.animation.LinearInterpolator;
import android.widget.Button;
import android.widget.Chronometer;
import android.widget.ImageButton;
import android.widget.LinearLayout;
import android.widget.Toast;
import com.irantapps.AfterLoginHome;
import com.irantapps.BaseActivity;
import com.irantapps.CameraPlay_New;
import com.irantapps.R;
import com.irantapps.utility.DateAndLength;
import com.irantapps.utility.VideoDetailsCollection;
/***
* TODO: 1. sound on/off 2. resolution change
*
* @author roman10
*
*/
public class VideoCapture_New extends BaseActivity implements
SurfaceHolder.Callback {
private SurfaceView prSurfaceView;
private ImageButton prStartBtn, prFrontBackCamera;
private Button prSettingsBtn;
private ImageButton btn_Gallery;
public String TAG = "IRANT";
private boolean prRecordInProcess;
private SurfaceHolder prSurfaceHolder;
private Camera prCamera;
private final String cVideoFilePath = "/sdcard/";
Chronometer cm_VideoCapture;
private Context prContext;
public static boolean frontCamera = false;
int mRotation;
LinearLayout linearLayoutRedbtn;
ImageButton btn;
Animation animation;
ImageButton btn_Cancel;
DateAndLength findDateandLength;
private VideoDetailsCollection videoDetails = VideoDetailsCollection.getSingletonObject();
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
this.requestWindowFeature(Window.FEATURE_NO_TITLE);
prContext = this.getApplicationContext();
setContentView(R.layout.videocapture_new);
Utils.createDirIfNotExist(cVideoFilePath);
findDateandLength=DateAndLength.getSingletonObject();
animation = new AlphaAnimation(1, 0); // Change alpha from fully visible
// to invisible
animation.setDuration(500); // duration - half a second
animation.setInterpolator(new LinearInterpolator()); // do not alter
// animation
// rate
animation.setRepeatCount(Animation.INFINITE); // Repeat animation
// infinitely
animation.setRepeatMode(Animation.REVERSE); // Reverse animation at the
// end so the button will
// fade back in
btn = (ImageButton) findViewById(R.id.main_btn1);
btn_Cancel = (ImageButton)findViewById(R.id.btn_wrongTick);
btn_Gallery = (ImageButton)findViewById(R.id.btn_gallerySelector);
linearLayoutRedbtn = (LinearLayout) findViewById(R.id.linear_btn1);
linearLayoutRedbtn.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View arg0) {
// TODO Auto-generated method stub
if (prRecordInProcess == false) {
cm_VideoCapture.setBase(SystemClock.elapsedRealtime());
//cm_VideoCapture.clearComposingText();
cm_VideoCapture.start();
try {
startRecording();
} catch (NoSuchMethodException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
linearLayoutRedbtn.startAnimation(animation);
} else {
stopRecording();
linearLayoutRedbtn.clearAnimation();
cm_VideoCapture.stop();
findDateandLength.setTimeLengthOfVideo(cm_VideoCapture.getText().toString());
//Toast.makeText(getApplicationContext(), "hello..."+cm_VideoCapture.getText(), Toast.LENGTH_LONG).show();
cm_VideoCapture.clearComposingText();
Intent intent = new Intent(VideoCapture_New.this,
CameraPlay_New.class);
startActivity(intent);
}
}
});
btn_Gallery.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View arg0) {
// TODO Auto-generated method stub
Intent intent = new Intent();
intent.setType("video/*");
intent.setAction(Intent.ACTION_GET_CONTENT);
startActivityForResult(Intent.createChooser(intent,"Select Video"), 2);
}
});
cm_VideoCapture = (Chronometer) findViewById(R.id.cm_VideoCapture);
prSurfaceView = (SurfaceView) findViewById(R.id.surface_camera);
prStartBtn = (ImageButton) findViewById(R.id.main_btn1);
prFrontBackCamera = (ImageButton) findViewById(R.id.btn_frontBackCamera);
//cm_VideoCapture.start();
cm_VideoCapture.clearComposingText();
// prSettingsBtn = (Button) findViewById(R.id.main_btn2);
prRecordInProcess = false;
prStartBtn.setOnClickListener(new View.OnClickListener() {
// @Override
public void onClick(View v) {
if (prRecordInProcess == false) {
cm_VideoCapture.setBase(SystemClock.elapsedRealtime());
//cm_VideoCapture.clearComposingText();
cm_VideoCapture.start();
try {
startRecording();
} catch (NoSuchMethodException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
} else {
stopRecording();
btn.clearAnimation();
cm_VideoCapture.stop();
cm_VideoCapture.clearComposingText();
Intent intent = new Intent(VideoCapture_New.this,
CameraPlay_New.class);
startActivity(intent);
}
}
});
prFrontBackCamera.setOnClickListener(new View.OnClickListener() {
@SuppressLint("NewApi")
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
// prCamera = openFrontFacingCameraGingerbread();
try {
if (Camera.getNumberOfCameras() == 2) {
if (frontCamera) {
frontCamera = false;
prCamera.stopPreview();
prMediaRecorder.release();
prMediaRecorder = null;
prCamera.release();
prCamera = null;
} else {
frontCamera = true;
prCamera.stopPreview();
prMediaRecorder.release();
prMediaRecorder = null;
prCamera.release();
prCamera = null;
}
Intent intent = new Intent(VideoCapture_New.this,
VideoCapture_New.class);
startActivity(intent);
} else {
Toast.makeText(VideoCapture_New.this,
"Your device doesn't contain Front Camera.",
Toast.LENGTH_SHORT).show();
}
} catch (Exception e) {
e.printStackTrace();
Toast.makeText(VideoCapture_New.this,
"Your device is not compatible for Front Camera.",
Toast.LENGTH_SHORT).show();
}
}
});
prSurfaceHolder = prSurfaceView.getHolder();
prSurfaceHolder.addCallback(this);
prSurfaceHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
// prCamera.setDisplayOrientation(90);
prMediaRecorder = new MediaRecorder();
btn_Cancel.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View arg0) {
// TODO Auto-generated method stub
finish();
}
});
}
@Override
public void surfaceChanged(SurfaceHolder _holder, int _format, int _width,
int _height) {
Camera.Parameters lParam = prCamera.getParameters();
prCamera.setParameters(lParam);
try {
prCamera.setPreviewDisplay(_holder);
prCamera.startPreview();
// prPreviewRunning = true;
} catch (IOException _le) {
_le.printStackTrace();
}
}
@SuppressLint({ "NewApi", "NewApi", "NewApi", "NewApi", "NewApi", "NewApi", "NewApi", "NewApi", "NewApi", "NewApi", "NewApi", "NewApi" })
@Override
public void surfaceCreated(SurfaceHolder arg0) {
if (frontCamera == false && prCamera== null) {
/*prCamera = Camera.open();
if (prCamera == null) {
Toast.makeText(this.getApplicationContext(),
"Camera is not available!", Toast.LENGTH_SHORT).show();
finish();
}*/
prCamera = Camera.open();
try {
prCamera.setPreviewDisplay(arg0);
// TODO test how much setPreviewCallbackWithBuffer is faster
//prCamera.setPreviewCallback(VideoCapture_New.this);
} catch (IOException e) {
prCamera.release();
prCamera = null;
}
if (prCamera == null) {
Toast.makeText(this.getApplicationContext(),
"Camera is not available!", Toast.LENGTH_SHORT).show();
finish();
}
}
/*else if (prCamera == null) {
prCamera = Camera.open();
try {
prCamera.setPreviewDisplay(arg0);
// TODO test how much setPreviewCallbackWithBuffer is faster
//prCamera.setPreviewCallback(VideoCapture_New.this);
} catch (IOException e) {
prCamera.release();
prCamera = null;
}
if (prCamera == null) {
Toast.makeText(this.getApplicationContext(),
"Camera is not available!", Toast.LENGTH_SHORT).show();
finish();
}
}*/else if (prCamera!=null){
prCamera.stopPreview();
prCamera.release();
prCamera=null;
}
else if (frontCamera == true) {
try {
int cameraCount = 0;
Camera.CameraInfo cameraInfo = new Camera.CameraInfo();
cameraCount = Camera.getNumberOfCameras();
for (int camIdx = 0; camIdx < cameraCount; camIdx++) {
Camera.getCameraInfo(camIdx, cameraInfo);
if (cameraInfo.facing == Camera.CameraInfo.CAMERA_FACING_FRONT) {
try {
prCamera = Camera.open(camIdx);
} catch (RuntimeException e) {
Log.i("Camera failed to open: ",
e.getLocalizedMessage());
}
}
}
} catch (Exception e) {
Toast.makeText(VideoCapture_New.this,
"Your Device doesn't compatible for Fron Camera.",
Toast.LENGTH_SHORT).show();
}
}
try {
Camera.CameraInfo info = new android.hardware.Camera.CameraInfo();
Camera.getCameraInfo(0, info);
int rotation = getWindowManager().getDefaultDisplay().getRotation();
int degrees = 0;
switch (rotation) {
case Surface.ROTATION_0:
degrees = 0;
break;
case Surface.ROTATION_90:
degrees = 90;
break;
case Surface.ROTATION_180:
degrees = 180;
break;
case Surface.ROTATION_270:
degrees = 270;
break;
}
int result;
if (info.facing == Camera.CameraInfo.CAMERA_FACING_FRONT) {
result = (info.orientation + degrees) % 180;
result = (360 - result) % 360; // compensate the mirror
} else { // back-facing
result = (info.orientation - degrees + 360) % 360;
}
this.mRotation = result;
prCamera.setDisplayOrientation(result);
} catch (NoClassDefFoundError e) {
// TODO Auto-generated catch block
e.printStackTrace();
prCamera.setDisplayOrientation(90);
Toast.makeText(VideoCapture_New.this,
"There is no Front Camera Facility.", Toast.LENGTH_SHORT)
.show();
}
}
@Override
public void surfaceDestroyed(SurfaceHolder holder) {
if (prCamera != null) {
prCamera.stopPreview();
prCamera.setPreviewCallback(null);
prCamera.release();
prCamera = null;
}
}
/*@Override
public void surfaceDestroyed(SurfaceHolder arg0) {
try {
if (prRecordInProcess) {
stopRecording();
} else {
prCamera.stopPreview();
}
prMediaRecorder.release();
prMediaRecorder = null;
prCamera.release();
prCamera = null;
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}*/
private MediaRecorder prMediaRecorder;
private final int cMaxRecordDurationInMs = 30000;
private final long cMaxFileSizeInBytes = 5000000;
private final int cFrameRate = 20;
private File prRecordedFile;
private void updateEncodingOptions() {
if (prRecordInProcess) {
stopRecording();
try {
startRecording();
} catch (NoSuchMethodException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
Toast.makeText(prContext, "Recording restarted with new options!",
Toast.LENGTH_SHORT).show();
} else {
Toast.makeText(prContext, "Recording options updated!",
Toast.LENGTH_SHORT).show();
}
}
@SuppressLint("NewApi")
private boolean startRecording() throws NoSuchMethodException {
prCamera.stopPreview();
try {
prCamera.unlock();
prMediaRecorder.setCamera(prCamera);
prMediaRecorder.setVideoSource(MediaRecorder.VideoSource.CAMERA);
prMediaRecorder.setAudioSource(MediaRecorder.AudioSource.DEFAULT);
String lVideoFileFullPath = ".mov";
prMediaRecorder.setOutputFormat(MediaRecorder.OutputFormat.MPEG_4);
String lDisplayMsg = "Current container format: ";
prMediaRecorder.setAudioEncoder(MediaRecorder.AudioEncoder.DEFAULT);
prMediaRecorder.setVideoEncoder(VideoEncoder.H263);
prMediaRecorder.setOrientationHint(90);
lDisplayMsg += "Current encoding format: ";
lVideoFileFullPath = Environment.getExternalStorageDirectory() + "/myvideo.mp4";
// prMediaRecorder.setOrientationHint(360);
//prMediaRecorder.setVideoSize(176, 144);
//prMediaRecorder.setVideoFrameRate(12);
prRecordedFile = new File(lVideoFileFullPath);
prMediaRecorder.setOutputFile(prRecordedFile.getPath());
//prMediaRecorder.setVideoFrameRate(cFrameRate);
prMediaRecorder.setPreviewDisplay(prSurfaceHolder.getSurface());
//prMediaRecorder.setMaxDuration(cMaxRecordDurationInMs);
//prMediaRecorder.setMaxFileSize(cMaxFileSizeInBytes);
// prepare for capturing
// state: DataSourceConfigured => prepared
prMediaRecorder.prepare();
// start recording
// state: prepared => recording
prMediaRecorder.start();
// prStartBtn.setText("Stop");
prRecordInProcess = true;
ExifInterface exif_Video = new ExifInterface(lVideoFileFullPath); //Since API Level 5
String exifOrientation_video = exif_Video.getAttribute(ExifInterface.TAG_ORIENTATION);
return true;
} catch (IOException _le) {
_le.printStackTrace();
return false;
}
}
private void stopRecording() {
prMediaRecorder.stop();
prMediaRecorder.reset();
try {
prCamera.reconnect();
} catch (IOException e) {
e.printStackTrace();
}
// prStartBtn.setText("Start");
prRecordInProcess = false;
prCamera.startPreview();
}
private static final int REQUEST_DECODING_OPTIONS = 0;
@Override
protected void onActivityResult(int requestCode, int resultCode,
Intent intent) {
super.onActivityResult(requestCode, resultCode, intent);
switch (requestCode) {
case REQUEST_DECODING_OPTIONS:
if (resultCode == RESULT_OK) {
updateEncodingOptions();
}
break;
case 2:
if (resultCode == RESULT_OK) {
//updateEncodingOptions();
if(requestCode == 2)
{
Uri selectedImageUri = intent.getData();
String selectedImagePath = getPath(selectedImageUri);
System.out.println("Image Path : " + selectedImagePath);
File file_Video = new File(selectedImagePath);
MediaPlayer mp = new MediaPlayer();
try {
mp.setDataSource(file_Video.getAbsolutePath());
videoDetails.setVideoPath(file_Video.getAbsolutePath());
if(mp.getDuration()<=3)
{
Intent intentGallery = new Intent(VideoCapture_New.this, CameraPlay_New.class);
startActivity(intentGallery);
}
else
{
AlertDialog.Builder alertDialogBuilder = new AlertDialog.Builder(
this);
// set title
alertDialogBuilder
.setTitle("Info");
// set dialog message
alertDialogBuilder
.setMessage("Video can't be larger than 3 mins.")
.setCancelable(false)
.setPositiveButton("OK",new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog,int id) {
// if this button is clicked, close
// current activity
dialog.cancel();
}
});
// create alert dialog
AlertDialog alertDialog = alertDialogBuilder.create();
// show it
alertDialog.show();
}
} catch (IllegalArgumentException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IllegalStateException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
System.out.println("Video Length:"+mp.getDuration());
}
//img.setImageURI(selectedImageUri);
}
break;
}
}
public String getPath(Uri uri) {
String[] projection = { MediaStore.Video.Media.DATA };
Cursor cursor = managedQuery(uri, projection, null, null, null);
int column_index = cursor.getColumnIndexOrThrow(MediaStore.Video.Media.DATA);
cursor.moveToFirst();
return cursor.getString(column_index);
}
@Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
if (keyCode == KeyEvent.KEYCODE_BACK) {
/*
* if(collapse==true||collapse_cat==true||collapse_FuelEconomy==true||
* collapse_LatestNews
* ==true||collapse_price==true||collapse_RecentlyViwed==true){
* Intent restartResearchActivity = new
* Intent(ResearchListNew.this,ResearchListNew.class);
* restartResearchActivity.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
* startActivity(restartResearchActivity);
*
* } else { finish(); }
*/
if (prRecordInProcess == false)
{
prCamera.lock();
}
else
{
stopRecording();
prCamera.lock();
}
Intent intent = new Intent(VideoCapture_New.this,
AfterLoginHome.class);
intent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
startActivity(intent);
return true;
} else {
return super.onKeyDown(keyCode, event);
}
}
}
提前致谢。