Android ContentResolver Read getExifOrientation(ContentResolver cr, Uri uri)

Description

get Exif Orientation

Declaration

public static int getExifOrientation(ContentResolver cr, Uri uri) 

Method Source Code

//package com.java2s;

import java.io.IOException;

import android.content.ContentResolver;

import android.database.Cursor;

import android.media.ExifInterface;
import android.net.Uri;

import android.provider.MediaStore.Images;
import android.util.Log;

public class Main {
    private static final String TAG = "Util";

    public static int getExifOrientation(ContentResolver cr, Uri uri) {
        int degree = 0;

        if (uri.getScheme().equals("content")) {
            String[] projection = { Images.ImageColumns.ORIENTATION };
            Cursor c = cr.query(uri, projection, null, null, null);
            if (c.moveToFirst()) {
                degree = c.getInt(0);// ww  w .  j av  a2s .  c o  m
            }
        } else if (uri.getScheme().equals("file")) {
            try {
                ExifInterface exif = new ExifInterface(uri.getPath());

                int orientation = exif.getAttributeInt(
                        ExifInterface.TAG_ORIENTATION, -1);
                if (orientation != -1) {
                    // We only recognize a subset of orientation tag values.
                    switch (orientation) {
                    case ExifInterface.ORIENTATION_ROTATE_90:
                        degree = 90;
                        break;
                    case ExifInterface.ORIENTATION_ROTATE_180:
                        degree = 180;
                        break;
                    case ExifInterface.ORIENTATION_ROTATE_270:
                        degree = 270;
                        break;
                    }

                }
            } catch (IOException e) {
                Log.e(TAG, "Error checking exif", e);
            }
        }

        return degree;
    }

    public static boolean equals(String a, String b) {
        // return true if both string are null or the content equals
        return a == b || a.equals(b);
    }
}

Related

1. fileUriToBase64(Uri uri, ContentResolver resolver)
2. readBytes(Uri uri, ContentResolver resolver)
3. getContentFromProvider( ContentResolver contentResolver, Uri uri, String[] valueTypes)