Android 保存bitmap到相册

落日映苍穹つ 2022-08-19 01:57 467阅读 0赞

安卓原生的保存相册方法可以用但是可调参数很少，对三星这样的手机支持不好，图片的创建时间一般为1970.1.1，可以通过复写android原生的方法来添加相关参数，比如照片创建时间和gps位置信息什么的

下面是保存到相册用的函数

/**
         * Insert an image and create a thumbnail for it.
         *
         * @param cr          The content resolver to use
         * @param source      The stream to use for the image
         * @param title       The name of the image
         * @param description The description of the image
         * @return The URL to the newly created image, or <code>null</code> if the image failed to be stored
         * for any reason.
         */
        public static String insertImage(ContentResolver cr, Bitmap source,
                                         String title, String description, String fileName) {
            ContentValues values = new ContentValues();
            values.put(MediaStore.Images.Media.TITLE, title);
            values.put(MediaStore.Images.Media.DESCRIPTION, description);
            values.put(MediaStore.Images.Media.MIME_TYPE, "image/jpeg");
            values.put(MediaStore.Images.Media.DATE_ADDED, System.currentTimeMillis());
            values.put(MediaStore.Images.Media.DATE_MODIFIED, System.currentTimeMillis()));
            values.put(MediaStore.Images.Media.DATE_TAKEN,System.currentTimeMillis());
    );
            values.put(MediaStore.Images.Media.DISPLAY_NAME, fileName);
            values.put(MediaStore.Images.Media.LATITUDE,36);
            values.put(MediaStore.Images.Media.LONGITUDE, 120);
            values.put(MediaStore.Images.Media.BUCKET_DISPLAY_NAME, "6666");
    
    
            Uri url = null;
            String stringUrl = null;    /* value to be returned */
    
            try {
                url = cr.insert(MediaStore.Images.Media.EXTERNAL_CONTENT_URI, values);
    
                if (source != null) {
                    OutputStream imageOut = cr.openOutputStream(url);
                    try {
                        source.compress(Bitmap.CompressFormat.JPEG, 36, imageOut);
                    } finally {
                        imageOut.close();
                    }
    
                    long id = ContentUris.parseId(url);
                    // Wait until MINI_KIND thumbnail is generated.
                    Bitmap miniThumb = MediaStore.Images.Thumbnails.getThumbnail(cr, id,
                            MediaStore.Images.Thumbnails.MINI_KIND, null);
                    // This is for backward compatibility.
                    Bitmap microThumb = StoreThumbnail(cr, miniThumb, id, 50F, 50F,
                            MediaStore.Images.Thumbnails.MICRO_KIND);
                } else {
                    JLogUtils.i("Alex", "Failed to create thumbnail, removing original");
                    cr.delete(url, null, null);
                    url = null;
                }
            } catch (Exception e) {
                Log.i("Alex", "Failed to insert image", e);
                if (url != null) {
                    cr.delete(url, null, null);
                    url = null;
                }
            }
    
            if (url != null) {
                stringUrl = url.toString();
            }
    
            return stringUrl;
        }
    
        private static final Bitmap StoreThumbnail(
                ContentResolver cr,
                Bitmap source,
                long id,
                float width, float height,
                int kind) {
            // create the matrix to scale it
            Matrix matrix = new Matrix();
    
            float scaleX = width / source.getWidth();
            float scaleY = height / source.getHeight();
    
            matrix.setScale(scaleX, scaleY);
    
            Bitmap thumb = Bitmap.createBitmap(source, 0, 0,
                    source.getWidth(),
                    source.getHeight(), matrix,
                    true);
    
            ContentValues values = new ContentValues(4);
            values.put(MediaStore.Images.Thumbnails.KIND, kind);
            values.put(MediaStore.Images.Thumbnails.IMAGE_ID, (int) id);
            values.put(MediaStore.Images.Thumbnails.HEIGHT, thumb.getHeight());
            values.put(MediaStore.Images.Thumbnails.WIDTH, thumb.getWidth());
    
            Uri url = cr.insert(MediaStore.Images.Thumbnails.EXTERNAL_CONTENT_URI, values);
    
            try {
                OutputStream thumbOut = cr.openOutputStream(url);
    
                thumb.compress(Bitmap.CompressFormat.JPEG, 100, thumbOut);
                thumbOut.close();
                return thumb;
            } catch (FileNotFoundException ex) {
                return null;
            } catch (IOException ex) {
                return null;
            }
        }

调用方法

try {
                                            ContentResolver cr = SelectPhotoActivity.this.getContentResolver();
                                            JImageUtils.insertImage(cr, currPhoto, "qraved" + JTimeUtils.getCurrentTimeLong(), "a photo from app", "我是filename没啥用");
                                        } catch (Exception e) {
                                            e.printStackTrace();
                                        }
                                        //对某些不更新相册的应用程序强制刷新
                                        Intent intent2 = new Intent(Intent.ACTION_MEDIA_SCANNER_SCAN_FILE);
                                        Uri uri = Uri.fromFile(new File("/sdcard/image.jpg"));//固定写法
                                        intent2.setData(uri);
                                       PhotoActivity.this.sendBroadcast(intent2);