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140 changes: 140 additions & 0 deletions
140
app/src/main/java/fr/remram/taquindroid/ImageTools.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,140 @@ | ||
| package fr.remram.taquindroid; | ||
|
|
||
| import android.content.Context; | ||
| import android.graphics.Bitmap; | ||
| import android.graphics.BitmapFactory; | ||
| import android.graphics.Matrix; | ||
| import android.media.ExifInterface; | ||
| import android.net.Uri; | ||
| import android.os.ParcelFileDescriptor; | ||
| import android.util.Log; | ||
|
|
||
| import java.io.File; | ||
| import java.io.FileDescriptor; | ||
| import java.io.FileOutputStream; | ||
| import java.io.IOException; | ||
| import java.io.InputStream; | ||
|
|
||
| public class ImageTools { | ||
|
|
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| public static String getExtension(String path) | ||
| { | ||
| int index = path.lastIndexOf("."); | ||
| if(index > 0 && index < path.length() - 1 && index >= path.length() - 5) | ||
| return path.substring(index).toLowerCase(); | ||
| else | ||
| return ""; | ||
| } | ||
|
|
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| public static int getOrientation(Context context, Uri photoUri) | ||
| { | ||
| try { | ||
| InputStream istream = context.getContentResolver().openInputStream(photoUri); | ||
| if(istream == null) | ||
| return ExifInterface.ORIENTATION_UNDEFINED; | ||
|
|
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| File outputDir = context.getCacheDir(); | ||
| String extension = getExtension(photoUri.getPath()); | ||
| File tempfile = File.createTempFile("taquindroid", extension, outputDir); | ||
| FileOutputStream ostream = new FileOutputStream(tempfile); | ||
|
|
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| byte[] buffer = new byte[4096]; | ||
| int len; | ||
| while((len = istream.read(buffer)) != -1) | ||
| ostream.write(buffer, 0, len); | ||
| ostream.close(); | ||
| istream.close(); | ||
|
|
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| ExifInterface exif = new ExifInterface(tempfile.getAbsolutePath()); | ||
| int orientation = exif.getAttributeInt(ExifInterface.TAG_ORIENTATION, | ||
| ExifInterface.ORIENTATION_UNDEFINED); | ||
| if(!tempfile.delete()) | ||
| Log.e("TAQUINDROID", String.format("Couldn't delete teporary file %s", tempfile.getAbsolutePath())); | ||
| return orientation; | ||
| } catch(IOException e) { | ||
| Log.e("TAQUINDROID", "Error reading image orientation"); | ||
| return ExifInterface.ORIENTATION_UNDEFINED; | ||
| } | ||
| } | ||
|
|
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| public static Matrix getImageMatrix(int orientation) | ||
| { | ||
| Matrix matrix = new Matrix(); | ||
| switch(orientation) | ||
| { | ||
| case ExifInterface.ORIENTATION_NORMAL: | ||
| return null; | ||
| 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 null; | ||
| } | ||
| return matrix; | ||
| } | ||
|
|
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| public static Matrix getImageMatrix(Context context, Uri photoUri) | ||
| { | ||
| return getImageMatrix(getOrientation(context, photoUri)); | ||
| } | ||
|
|
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| public static Bitmap orientBitmap(Bitmap image, int orientation) | ||
| { | ||
| Matrix matrix = getImageMatrix(orientation); | ||
| if(matrix == null) | ||
| return image; | ||
| try { | ||
| Bitmap image2 = Bitmap.createBitmap(image, 0, 0, image.getWidth(), image.getHeight(), matrix, true); | ||
| image.recycle(); | ||
| return image2; | ||
| } | ||
| catch(OutOfMemoryError e) { | ||
| e.printStackTrace(); | ||
| return null; | ||
| } | ||
| } | ||
|
|
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| public static Bitmap getBitmap(Context context, Uri uri) | ||
| { | ||
| try { | ||
| ParcelFileDescriptor descriptor = context.getContentResolver().openFileDescriptor(uri, "r"); | ||
| if(descriptor != null) | ||
| { | ||
| FileDescriptor fileDescriptor = descriptor.getFileDescriptor(); | ||
| Bitmap image = BitmapFactory.decodeFileDescriptor(fileDescriptor); | ||
| descriptor.close(); | ||
|
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| int orientation = ImageTools.getOrientation(context, uri); | ||
| image = ImageTools.orientBitmap(image, orientation); | ||
|
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| return image; | ||
| } | ||
| else | ||
| return null; | ||
| } catch(IOException e) { | ||
| return null; | ||
| } | ||
| } | ||
|
|
||
| } |
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