decode Bitmap by orientation - Android Graphics

Android examples for Graphics:Bitmap Read

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Description

decode Bitmap by orientation

Demo Code

/*/*from   ww  w  .j a v  a 2s.c om*/
 * Twittnuker - Twitter client for Android
 *
 * Copyright (C) 2013-2014 vanita5 <mail@vanita5.de>
 *
 * This program incorporates a modified version of Twidere.
 * Copyright (C) 2012-2014 Mariotaku Lee <mariotaku.lee@gmail.com>
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Matrix;
import java.io.FileDescriptor;
import java.io.FileInputStream;
import java.io.InputStream;

public class Main{
    public static Bitmap decode(final FileDescriptor fd,
            final BitmapFactory.Options opts) {
        if (fd == null)
            return null;
        final int orientation = Exif
                .getOrientation(new FileInputStream(fd));
        final Bitmap bm = BitmapFactory
                .decodeFileDescriptor(fd, null, opts);
        final Matrix m = new Matrix();
        switch (orientation) {
        case 270:
        case 90:
            m.postRotate(orientation);
            return Bitmap.createBitmap(bm, 0, 0, bm.getWidth(),
                    bm.getHeight(), m, true);
        case 180:
            m.postRotate(orientation);
            m.postScale(bm.getWidth(), bm.getHeight());
            return Bitmap.createBitmap(bm, 0, 0, bm.getWidth(),
                    bm.getHeight(), m, true);
        }
        return bm;
    }
    public static Bitmap decode(final InputStream is,
            final BitmapFactory.Options opts) {
        if (is == null)
            return null;
        final int orientation = Exif.getOrientation(is);
        final Bitmap bm = BitmapFactory.decodeStream(is, null, opts);
        final Matrix m = new Matrix();
        switch (orientation) {
        case 270:
        case 90:
            m.postRotate(orientation);
            return Bitmap.createBitmap(bm, 0, 0, bm.getWidth(),
                    bm.getHeight(), m, true);
        case 180:
            m.postRotate(orientation);
            m.postScale(bm.getWidth(), bm.getHeight());
            return Bitmap.createBitmap(bm, 0, 0, bm.getWidth(),
                    bm.getHeight(), m, true);
        }
        return bm;
    }
    public static Bitmap decode(final String path,
            final BitmapFactory.Options opts) {
        if (path == null || opts == null)
            return null;
        final Bitmap bm = BitmapFactory.decodeFile(path, opts);
        if (bm == null)
            return null;
        final Matrix m = new Matrix();
        final int orientation = Exif.getOrientation(path);
        switch (orientation) {
        case 270:
        case 90:
            m.postRotate(orientation);
            return Bitmap.createBitmap(bm, 0, 0, bm.getWidth(),
                    bm.getHeight(), m, true);
        case 180:
            m.postRotate(orientation);
            m.postScale(bm.getWidth(), bm.getHeight());
            return Bitmap.createBitmap(bm, 0, 0, bm.getWidth(),
                    bm.getHeight(), m, true);
        }
        return bm;
    }
}

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