android中三星设备上的相机捕捉方向
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【中文标题】android中三星设备上的相机捕捉方向【英文标题】：Camera capture orientation on samsung devices in android 【发布时间】：2013-08-14 17:33:10 【问题描述】：我正在创建一个相机应用程序。捕获的图像显示在网格视图中。 现在，该代码在除三星设备之外的所有设备上都可以正常运行。
我正面临方向问题。当我以纵向模式拍摄图像时，图像在网格视图中显示时会旋转。我没有保留任何旋转代码。 其次，使用 EXIF，我在网格视图中获得了正确的图像，但是当设备方向发生变化时，图像再次以奇怪的方式旋转。
附加图片：
对不起，图片的分辨率。请让我知道它们是否不正确。将再次上传。我知道有很多这样的帮助。但我想我被困在某个地方了。
我指的是以下链接：
http://blog.andolasoft.com/2013/06/how-to-show-captured-images-dynamically-in-gridview-layout.html
【问题讨论】：
【参考方案1】：这是我使用的代码（适用于所有设备）：
这部分是我在主要活动中将拍摄的照片设置为图像视图的地方：
try
File imageFile = new File(cursor.getString(0));
ExifInterface exif = new ExifInterface(
imageFile.getAbsolutePath());
int orientation = exif.getAttributeInt(
ExifInterface.TAG_ORIENTATION,
ExifInterface.ORIENTATION_NORMAL);
switch (orientation)
case ExifInterface.ORIENTATION_ROTATE_270:
rotate = 270;
break;
case ExifInterface.ORIENTATION_ROTATE_180:
rotate = 180;
break;
case ExifInterface.ORIENTATION_ROTATE_90:
rotate = 90;
break;
Log.v("", "Exif orientation: " + orientation);
catch (Exception e)
e.printStackTrace();
Matrix matrix = new Matrix();
matrix.postRotate(rotate);
bmp = Bitmap.createBitmap(bmp, 0, 0, bmp.getWidth(), bmp.getHeight(), matrix, true);
testImage.setImageBitmap(null);
testImage.setImageBitmap(bmp);
相机活动中的常量值：
private static final int ORIENTATION_PORTRAIT_NORMAL = 1;
private static final int ORIENTATION_PORTRAIT_INVERTED = 2;
private static final int ORIENTATION_LANDSCAPE_NORMAL = 3;
private static final int ORIENTATION_LANDSCAPE_INVERTED = 4;
private OrientationEventListener mOrientationEventListener;
private int mOrientation = -1;
相机活动中的回调函数：
Camera.PictureCallback photoCallback=new Camera.PictureCallback()
public void onPictureTaken(final byte[] data, final Camera camera)
dialog=ProgressDialog.show(CameraActivity.this,"","Please wait while the photo is being saved..");
new Thread()
public void run()
try
Thread.sleep(1000);
catch(Exception ex)
onPictureTake(data,camera);
.start();
;
相机活动中的拍照功能：
public void onPictureTake(byte[] data, Camera camera)
switch (mOrientation)
case ORIENTATION_PORTRAIT_NORMAL:
rotate = 90;
break;
case ORIENTATION_LANDSCAPE_NORMAL:
rotate = 0;
break;
case ORIENTATION_PORTRAIT_INVERTED:
rotate = 270;
break;
case ORIENTATION_LANDSCAPE_INVERTED:
rotate = 180;
break;
Matrix matrix = new Matrix();
matrix.postRotate(rotate);
bmp = BitmapFactory.decodeByteArray(data, 0, data.length);
bmp = Bitmap.createBitmap(bmp, 0, 0, bmp.getWidth(), bmp.getHeight(), matrix, true);
mutableBitmap = bmp.copy(Bitmap.Config.ARGB_8888, true);
savePhoto(mutableBitmap);
dialog.dismiss();
flag = 0;
finish();
在相机活动的 onresume 中调用的方向监听器：
mOrientationEventListener = new OrientationEventListener(this, SensorManager.SENSOR_DELAY_NORMAL)
@SuppressWarnings("deprecation")
@Override
public void onOrientationChanged(int orientation)
// determine our orientation based on sensor response
int lastOrientation = mOrientation;
Display display = ((WindowManager)getSystemService(WINDOW_SERVICE)).getDefaultDisplay();
int rotation = getWindowManager().getDefaultDisplay().getRotation();
System.out.println(rotation+"");
if (display.getOrientation() != Surface.ROTATION_0) // landscape oriented devices
System.out.println("LANDSCAPE");
if (orientation >= 315 || orientation < 45)
if (mOrientation != ORIENTATION_LANDSCAPE_NORMAL)
mOrientation = ORIENTATION_LANDSCAPE_NORMAL;
else if (orientation < 315 && orientation >= 225)
if (mOrientation != ORIENTATION_PORTRAIT_INVERTED)
mOrientation = ORIENTATION_PORTRAIT_INVERTED;
else if (orientation < 225 && orientation >= 135)
if (mOrientation != ORIENTATION_LANDSCAPE_INVERTED)
mOrientation = ORIENTATION_LANDSCAPE_INVERTED;
else if (orientation <135 && orientation > 45)
if (mOrientation != ORIENTATION_PORTRAIT_NORMAL)
mOrientation = ORIENTATION_PORTRAIT_NORMAL;
else // portrait oriented devices
System.out.println("PORTRAIT");
if (orientation >= 315 || orientation < 45)
if (mOrientation != ORIENTATION_PORTRAIT_NORMAL)
mOrientation = ORIENTATION_PORTRAIT_NORMAL;
else if (orientation < 315 && orientation >= 225)
if (mOrientation != ORIENTATION_LANDSCAPE_NORMAL)
mOrientation = ORIENTATION_LANDSCAPE_NORMAL;
else if (orientation < 225 && orientation >= 135)
if (mOrientation != ORIENTATION_PORTRAIT_INVERTED)
mOrientation = ORIENTATION_PORTRAIT_INVERTED;
else if (orientation <135 && orientation > 45)
if (mOrientation != ORIENTATION_LANDSCAPE_INVERTED)
mOrientation = ORIENTATION_LANDSCAPE_INVERTED;
;
【讨论】：
只为三星工作！！【参考方案2】：这是我在我的应用中用于旋转并适用于所有设备的代码：
private Bitmap adjustImageOrientation(Bitmap image)
ExifInterface exif;
try
exif = new ExifInterface(picturePath);
int exifOrientation = exif.getAttributeInt(
ExifInterface.TAG_ORIENTATION,
ExifInterface.ORIENTATION_NORMAL);
int rotate = 0;
switch (exifOrientation)
case ExifInterface.ORIENTATION_ROTATE_90:
rotate = 90;
break;
case ExifInterface.ORIENTATION_ROTATE_180:
rotate = 180;
break;
case ExifInterface.ORIENTATION_ROTATE_270:
rotate = 270;
break;
if (rotate != 0)
int w = image.getWidth();
int h = image.getHeight();
// Setting pre rotate
Matrix mtx = new Matrix();
mtx.preRotate(rotate);
// Rotating Bitmap & convert to ARGB_8888, required by tess
image = Bitmap.createBitmap(image, 0, 0, w, h, mtx, false);
catch (IOException e)
return null;
return image.copy(Bitmap.Config.ARGB_8888, true);
【讨论】：
这是在旋转我的手机屏幕:(【参考方案3】：首先你需要得到原始文件的方向--
try
ExifInterface exif = new ExifInterface("File AbsolutePath");
int orientation = exif.getAttributeInt(ExifInterface.TAG_ORIENTATION, ExifInterface.ORIENTATION_UNDEFINED);
Bitmap bm = rotateBitmap("Old Bitmap", orientation);
catch (IOException e)
e.printStackTrace();
您需要编写一个方法，将位图旋转到正确的方向后返回它。
public Bitmap rotateBitmap(Bitmap bitmap, int orientation) throws IOException
Matrix matrix = new Matrix();
switch (orientation)
case ExifInterface.ORIENTATION_NORMAL:
return bitmap;
case ExifInterface.ORIENTATION_FLIP_HORIZONTAL:
matrix.setScale(-1, 1);
break;
case ExifInterface.ORIENTATION_ROTATE_180:
matrix.setRotate(180);
break;
case ExifInterface.ORIENTATION_FLIP_VERTICAL:
matrix.setRotate(180);
matrix.postScale(-1, 1);
break;
case ExifInterface.ORIENTATION_TRANSPOSE:
matrix.setRotate(90);
matrix.postScale(-1, 1);
break;
case ExifInterface.ORIENTATION_ROTATE_90:
matrix.setRotate(90);
break;
case ExifInterface.ORIENTATION_TRANSVERSE:
matrix.setRotate(-90);
matrix.postScale(-1, 1);
break;
case ExifInterface.ORIENTATION_ROTATE_270:
matrix.setRotate(-90);
break;
default:
return bitmap;
try
Bitmap bmRotated = Bitmap.createBitmap(bitmap, 0, 0, bitmap.getWidth(), bitmap.getHeight(), matrix, true);
bitmap.recycle();
return bmRotated;
catch (OutOfMemoryError e)
e.printStackTrace();
return null;
【讨论】：
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