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@@ -0,0 +1,180 @@
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+package com.miekir.ocr.tool;
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+
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+import android.content.ContentUris;
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+import android.content.Context;
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+import android.database.Cursor;
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+import android.graphics.Bitmap;
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+import android.graphics.Matrix;
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+import android.media.ExifInterface;
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+import android.net.Uri;
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+import android.os.Build;
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+import android.os.Environment;
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+import android.provider.DocumentsContract;
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+import android.provider.MediaStore;
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+
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+import java.io.IOException;
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+
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+public class ImageOrientation {
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+
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+
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+ public static Bitmap modifyOrientation(String filePath, Bitmap bitmap) throws IOException {
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+ ExifInterface ei = new ExifInterface(filePath);
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+ int orientation = ei.getAttributeInt(ExifInterface.TAG_ORIENTATION, ExifInterface.ORIENTATION_NORMAL);
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+
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+ switch (orientation) {
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+ case ExifInterface.ORIENTATION_ROTATE_90:
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+ return rotate(bitmap, 90);
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+
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+ case ExifInterface.ORIENTATION_ROTATE_180:
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+ return rotate(bitmap, 180);
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+
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+ case ExifInterface.ORIENTATION_ROTATE_270:
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+ return rotate(bitmap, 270);
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+
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+ case ExifInterface.ORIENTATION_FLIP_HORIZONTAL:
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+ return flip(bitmap, true, false);
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+
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+ case ExifInterface.ORIENTATION_FLIP_VERTICAL:
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+ return flip(bitmap, false, true);
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+
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+ default:
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+ return bitmap;
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+ }
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+ }
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+
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+ public static String getPath(final Context context, final Uri uri) {
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+
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+ final boolean isKitKat = Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT;
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+
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+ // DocumentProvider
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+ if (isKitKat && DocumentsContract.isDocumentUri(context, uri)) {
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+ // ExternalStorageProvider
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+ if (isExternalStorageDocument(uri)) {
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+ final String docId = DocumentsContract.getDocumentId(uri);
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+ final String[] split = docId.split(":");
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+ final String type = split[0];
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+
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+ if ("primary".equalsIgnoreCase(type)) {
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+ return Environment.getExternalStorageDirectory() + "/" + split[1];
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+ }
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+
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+ // TODO handle non-primary volumes
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+ }
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+ // DownloadsProvider
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+ else if (isDownloadsDocument(uri)) {
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+
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+ final String id = DocumentsContract.getDocumentId(uri);
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+ final Uri contentUri = ContentUris.withAppendedId(
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+ Uri.parse("content://downloads/public_downloads"), Long.valueOf(id));
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+
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+ return getDataColumn(context, contentUri, null, null);
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+ }
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+ // MediaProvider
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+ else if (isMediaDocument(uri)) {
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+ final String docId = DocumentsContract.getDocumentId(uri);
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+ final String[] split = docId.split(":");
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+ final String type = split[0];
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+
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+ Uri contentUri = null;
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+ if ("image".equals(type)) {
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+ contentUri = MediaStore.Images.Media.EXTERNAL_CONTENT_URI;
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+ } else if ("video".equals(type)) {
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+ contentUri = MediaStore.Video.Media.EXTERNAL_CONTENT_URI;
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+ } else if ("audio".equals(type)) {
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+ contentUri = MediaStore.Audio.Media.EXTERNAL_CONTENT_URI;
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+ }
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+
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+ final String selection = "_id=?";
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+ final String[] selectionArgs = new String[]{
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+ split[1]
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+ };
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+
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+ return getDataColumn(context, contentUri, selection, selectionArgs);
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+ }
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+ }
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+ // MediaStore (and general)
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+ else if ("content".equalsIgnoreCase(uri.getScheme())) {
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+ return getDataColumn(context, uri, null, null);
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+ }
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+ // File
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+ else if ("file".equalsIgnoreCase(uri.getScheme())) {
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+ return uri.getPath();
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+ }
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+
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+ return null;
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+ }
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+
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+ /**
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+ * Get the value of the data column for this Uri. This is useful for
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+ * MediaStore Uris, and other file-based ContentProviders.
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+ *
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+ * @param context The context.
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+ * @param uri The Uri to query.
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+ * @param selection (Optional) Filter used in the query.
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+ * @param selectionArgs (Optional) Selection arguments used in the query.
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+ * @return The value of the _data column, which is typically a file path.
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+ */
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+ private static String getDataColumn(Context context, Uri uri, String selection,
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+ String[] selectionArgs) {
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+
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+ Cursor cursor = null;
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+ final String column = "_data";
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+ final String[] projection = {
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+ column
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+ };
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+
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+ try {
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+ cursor = context.getContentResolver().query(uri, projection, selection, selectionArgs,
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+ null);
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+ if (cursor != null && cursor.moveToFirst()) {
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+ final int column_index = cursor.getColumnIndexOrThrow(column);
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+ return cursor.getString(column_index);
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+ }
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+ } finally {
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+ if (cursor != null) {
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+ cursor.close();
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+ }
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+ }
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+ return null;
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+ }
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+
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+
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+ /**
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+ * @param uri The Uri to check.
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+ * @return Whether the Uri authority is ExternalStorageProvider.
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+ */
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+ private static boolean isExternalStorageDocument(Uri uri) {
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+ return "com.android.externalstorage.documents".equals(uri.getAuthority());
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+ }
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+
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+ /**
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+ * @param uri The Uri to check.
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+ * @return Whether the Uri authority is DownloadsProvider.
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+ */
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+ private static boolean isDownloadsDocument(Uri uri) {
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+ return "com.android.providers.downloads.documents".equals(uri.getAuthority());
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+ }
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+
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+ /**
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+ * @param uri The Uri to check.
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+ * @return Whether the Uri authority is MediaProvider.
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+ */
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+ private static boolean isMediaDocument(Uri uri) {
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+ return "com.android.providers.media.documents".equals(uri.getAuthority());
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+ }
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+
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+
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+ private static Bitmap rotate(Bitmap bitmap, float degrees) {
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+ Matrix matrix = new Matrix();
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+ matrix.postRotate(degrees);
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+ return Bitmap.createBitmap(bitmap, 0, 0, bitmap.getWidth(), bitmap.getHeight(), matrix, true);
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+ }
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+
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+ private static Bitmap flip(Bitmap bitmap, boolean horizontal, boolean vertical) {
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+ Matrix matrix = new Matrix();
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+ matrix.preScale(horizontal ? -1 : 1, vertical ? -1 : 1);
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+ return Bitmap.createBitmap(bitmap, 0, 0, bitmap.getWidth(), bitmap.getHeight(), matrix, true);
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+ }
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+
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+
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+}
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詹子聪