我们正在尝试创建一个可以将视频保存到目录的应用。但是，它不会保存为mp4文件而是文件夹！例如，当我录制视频时，它会被保存为文件夹（/ root / DCIM / sdcard / DCIM / Camera App / video.mp4 /）。
以下是我们的代码：
/ ** *视频 * / // Context context = this;
private boolean prepareMediaRecorder() {
String path = String.valueOf(getOutputMediaFile(MEDIA_TYPE_VIDEO));
File file = new File(path, "Eye Spy");
file.mkdirs();
mMediaRecorder = new MediaRecorder();
try {
mCamera.unlock();
} catch (Exception ex) {
return false;
}
// adjust the camera the way you need
mMediaRecorder.setCamera(mCamera);
mMediaRecorder.setAudioSource(MediaRecorder.AudioSource.DEFAULT);
mMediaRecorder.setVideoSource(MediaRecorder.VideoSource.DEFAULT);
//
CamcorderProfile profile = CamcorderProfile.get(Camera.CameraInfo.CAMERA_FACING_BACK, CamcorderProfile.QUALITY_LOW);
profile.fileFormat = MediaRecorder.OutputFormat.MPEG_4;
profile.videoCodec = MediaRecorder.VideoEncoder.MPEG_4_SP;
profile.videoFrameHeight = 240;
profile.videoFrameWidth = 320;
profile.videoBitRate = 15;
mMediaRecorder.setProfile(profile);
mMediaRecorder.setPreviewDisplay(mPreview.getSurface());
mMediaRecorder.setOutputFile(path);
//set max size
mMediaRecorder.setMaxDuration(600000); // Set max duration 60 sec.
mMediaRecorder.setMaxFileSize(50000000); // Set max file size 50M
try {
mMediaRecorder.prepare();
} catch (Exception e) {
releaseMediaRecorder();
e.printStackTrace();
}
Intent mediaScanIntent = new Intent(Intent.ACTION_MEDIA_SCANNER_SCAN_FILE);
Uri contentUri = Uri.fromFile(file);
mediaScanIntent.setData(contentUri);
getBaseContext().sendBroadcast(mediaScanIntent);
return true;
}
private void releaseMediaRecorder() {
if (mMediaRecorder != null) {
mMediaRecorder.reset(); // clear recorder configuration
mMediaRecorder.release(); // release the recorder object
mMediaRecorder = null;
if (mCamera != null) {
mCamera.lock(); // lock camera for later use
}
}
}
private Camera.PictureCallback mPicture = new Camera.PictureCallback() {
@Override
public void onPictureTaken(byte[] data, Camera camera) {
File pictureFile = getOutputMediaFile(MEDIA_TYPE_IMAGE);
if (pictureFile == null) {
Log.i("TRY:", " Error creating media file, check storage permissions:");
Log.d(TAG, "Error creating media file, check storage permissions: " +
e.getMessage());
return;
}
try {
FileOutputStream fos = new FileOutputStream(pictureFile);
fos.write(data);
Toast.makeText(InstagramProfilePage.this, "Picture taken!", Toast.LENGTH_SHORT).show();
/*loc2Exif(pictureFile);*/
fos.close();
} catch (FileNotFoundException e) {
Log.d(TAG, "File not found: " + e.getMessage());
} catch (IOException e) {
Log.d(TAG, "Error accessing file: " + e.getMessage());
}
Intent mediaScanIntent = new Intent(Intent.ACTION_MEDIA_SCANNER_SCAN_FILE);
Uri contentUri = Uri.fromFile(pictureFile);
mediaScanIntent.setData(contentUri);
getBaseContext().sendBroadcast(mediaScanIntent);
mCamera.startPreview();
}
/*mCamera.startPreview();*/
};
/**
* Create a file Uri for saving an image or video
*/
private static Uri getOutputMediaFileUri(int type) {
return Uri.fromFile(getOutputMediaFile(type));
}
/**
* Create a File for saving an image or video
*/
private static File getOutputMediaFile(int type) {
// To be safe, you should check that the SDCard is mounted
// using Environment.getExternalStorageState() before doing this.
File mediaStorageDir = new File(Environment.getExternalStoragePublicDirectory(
Environment.DIRECTORY_PICTURES), "Eye Spy");
// This location works best if you want the created images to be shared
// between applications and persist after your app has been uninstalled.
// Create the storage directory if it does not exist
if (!mediaStorageDir.exists()) {
if (!mediaStorageDir.mkdirs()) {
Log.d("Eye Spy", "failed to create directory");
return null;
}
}
// Create a media file name
String timeStamp = new SimpleDateFormat("yyyyMMdd_HHmmss").format(new Date());
File mediaFile;
if (type == MEDIA_TYPE_IMAGE) {
mediaFile = new File(mediaStorageDir.getPath() + File.separator +
"IMG_" + timeStamp + ".jpg");
Log.i("TRY:", " PICTURE SAVED");
} else if (type == MEDIA_TYPE_VIDEO) {
mediaStorageDir = new File(Environment.getExternalStoragePublicDirectory(
Environment.DIRECTORY_PICTURES), "Eye Spy");
mediaFile = new File(mediaStorageDir.getPath() + File.separator +
"VID_" + timeStamp + ".mp4");
} else {
Log.i("TRY:", " file = null");
return null;
}
Log.i("TRY:", mediaFile.getPath());
return mediaFile;
}
private Camera.PictureCallback mPicture = new Camera.PictureCallback() {
@Override
public void onPictureTaken(byte[] data, Camera camera) {
File pictureFile = getOutputMediaFile(MEDIA_TYPE_IMAGE);
if (pictureFile == null) {
Log.i("TRY:", " Error creating media file, check storage permissions:");
Log.d(TAG, "Error creating media file, check storage permissions: " +
e.getMessage());
return;
}
try {
FileOutputStream fos = new FileOutputStream(pictureFile);
fos.write(data);
Toast.makeText(InstagramProfilePage.this, "Picture taken!", Toast.LENGTH_SHORT).show();
/*loc2Exif(pictureFile);*/
fos.close();
} catch (FileNotFoundException e) {
Log.d(TAG, "File not found: " + e.getMessage());
} catch (IOException e) {
Log.d(TAG, "Error accessing file: " + e.getMessage());
}
Intent mediaScanIntent = new Intent(Intent.ACTION_MEDIA_SCANNER_SCAN_FILE);
Uri contentUri = Uri.fromFile(pictureFile);
mediaScanIntent.setData(contentUri);
getBaseContext().sendBroadcast(mediaScanIntent);
mCamera.startPreview();
}
/*mCamera.startPreview();*/
};
/**
* Create a file Uri for saving an image or video
*/
private static Uri getOutputMediaFileUri(int type) {
return Uri.fromFile(getOutputMediaFile(type));
}
/**
* Create a File for saving an image or video
*/
private static File getOutputMediaFile(int type) {
// To be safe, you should check that the SDCard is mounted
// using Environment.getExternalStorageState() before doing this.
File mediaStorageDir = new File(Environment.getExternalStoragePublicDirectory(
Environment.DIRECTORY_PICTURES), "Eye Spy");
// This location works best if you want the created images to be shared
// between applications and persist after your app has been uninstalled.
// Create the storage directory if it does not exist
if (!mediaStorageDir.exists()) {
if (!mediaStorageDir.mkdirs()) {
Log.d("Eye Spy", "failed to create directory");
return null;
}
}
// Create a media file name
String timeStamp = new SimpleDateFormat("yyyyMMdd_HHmmss").format(new Date());
File mediaFile;
if (type == MEDIA_TYPE_IMAGE) {
mediaFile = new File(mediaStorageDir.getPath() + File.separator +
"IMG_" + timeStamp + ".jpg");
Log.i("TRY:", " PICTURE SAVED");
} else if (type == MEDIA_TYPE_VIDEO) {
mediaStorageDir = new File(Environment.getExternalStoragePublicDirectory(
Environment.DIRECTORY_PICTURES), "Eye Spy");
mediaFile = new File(mediaStorageDir.getPath() + File.separator +
"VID_" + timeStamp + ".mp4");
} else {
Log.i("TRY:", " file = null");
return null;
}
Log.i("TRY:", mediaFile.getPath());
return mediaFile;
}
答案 0 :(得分：1)
当您在第二行代码上调用getOutputMediaFile(MEDIA_TYPE_VIDEO)时，您将获得.mp4 File，当您将其转换为字符串时：
String path = String.valueOf(getOutputMediaFile(MEDIA_TYPE_VIDEO));
你得到了文件的绝对路径，然后你正在调用file.mkdirs()，它会在该路径之外创建一个文件夹，基本上你是说创建一个文件夹而不是文件。你想要做的是创建文件夹然后创建实际文件。
<强>解决方案
而不是打电话：
file.mkdirs();
使用这行代码创建文件父文件夹：
file.getParentFile().mkdirs();