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Fix rotation on Android, using EXIF data #135

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Fix rotation on Android, using EXIF data #135

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56894fc
read and apply the exif data to the canvas background images on android
klinker24 Oct 21, 2019
8763a26
fix typos
klinker24 Oct 21, 2019
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26 changes: 24 additions & 2 deletions android/src/main/java/com/terrylinla/rnsketchcanvas/SketchCanvas.java
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Original file line number Diff line number Diff line change
Expand Up @@ -9,6 +9,8 @@
import android.graphics.PointF;
import android.graphics.PorterDuff;
import android.graphics.Rect;
import android.graphics.Matrix;
import android.media.ExifInterface;
import android.os.Environment;
import android.util.Base64;
import android.util.Log;
Expand Down Expand Up @@ -69,10 +71,30 @@ public boolean openImageFile(String filename, String directory, String mode) {
"drawable",
mContext.getPackageName());
BitmapFactory.Options bitmapOptions = new BitmapFactory.Options();
File file = new File(filename, directory == null ? "" : directory);
Bitmap bitmap = res == 0 ?
BitmapFactory.decodeFile(new File(filename, directory == null ? "" : directory).toString(), bitmapOptions) :
BitmapFactory.decodeFile(file.toString(), bitmapOptions) :
BitmapFactory.decodeResource(mContext.getResources(), res);
if(bitmap != null) {

try {
ExifInterface exif = new ExifInterface(file.getAbsolutePath());
Matrix matrix = new Matrix();

int orientation = exif.getAttributeInt(ExifInterface.TAG_ORIENTATION, 1);
if (orientation == ExifInterface.ORIENTATION_ROTATE_90) {
matrix.postRotate(90);
} else if (orientation == ExifInterface.ORIENTATION_ROTATE_180) {
matrix.postRotate(180);
} else if (orientation == ExifInterface.ORIENTATION_ROTATE_270) {
matrix.postRotate(270);
}

bitmap = Bitmap.createBitmap(bitmap, 0, 0, bitmap.getWidth(), bitmap.getHeight(), matrix, true); // rotating bitmap
} catch (Exception e) {

}

if (bitmap != null) {
mBackgroundImage = bitmap;
mOriginalHeight = bitmap.getHeight();
mOriginalWidth = bitmap.getWidth();
Expand Down