Android保存图片到本地或者数据库，并通知相册更新

版权声明：本文为博主原创文章，未经博主允许不得转载。 https://blog.csdn.net/lylddingHFFW/article/details/75134849

Android保存图片到media，并更新相册

 //保存到本地
    public static void savePhoto(Context context, Bitmap bitmap){
        File photoDir = new File(Environment.getExternalStorageDirectory(),"MeiTuanApp");
        if (!photoDir.exists()){
            photoDir.mkdirs();
        }
        String fileName = System.currentTimeMillis()+".jpg";
        File photo = new File(photoDir,fileName);
        try {
            FileOutputStream fos = new FileOutputStream(photo);
            bitmap.compress(Bitmap.CompressFormat.JPEG,100,fos);
            fos.flush();
            fos.close();
        }catch (FileNotFoundException e){
            e.printStackTrace();
        }catch (IOException e){
            e.printStackTrace();
        }
        updatePhotoMedia(photo,context);
    }

    //保存到数据库
    public static void savePhotoToMedia(Context context, Bitmap bitmap){
        String uriString = MediaStore.Images.Media.insertImage(context.getContentResolver(),
                bitmap, null, null);
        File file = new File(getRealPathFromURI(Uri.parse(uriString),context));
        updatePhotoMedia(file,context);
    }

    //更新图库
    private static void updatePhotoMedia(File file ,Context context){
        Intent intent = new Intent();
        intent.setAction(Intent.ACTION_MEDIA_SCANNER_SCAN_FILE);
        intent.setData(Uri.fromFile(file));
        context.sendBroadcast(intent);
    }
    //得到绝对地址
    private static String getRealPathFromURI(Uri contentUri,Context context) {
        String[] proj = { MediaStore.Images.Media.DATA };
        Cursor cursor = context.getContentResolver().query(contentUri, proj, null, null, null);
        int column_index = cursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);
        cursor.moveToFirst();
        String fileStr = cursor.getString(column_index);
        cursor.close();
        return fileStr;
    }