android 获取手机中的所有图片或某一目录下的图片方法

private void getAllPhotoInfo() {    new Thread(new Runnable() {      @Override      public void run() {//        List<MediaBean> mediaBeen = new ArrayList<>();        HashMap<String,List<MediaBean>> allPhotosTemp = new HashMap<>();//所有照片        Uri mImageUri = MediaStore.Images.Media.EXTERNAL_CONTENT_URI;        String[] projImage = { MediaStore.Images.Media._ID            , MediaStore.Images.Media.DATA            ,MediaStore.Images.Media.SIZE            ,MediaStore.Images.Media.DISPLAY_NAME};        final Cursor mCursor = getContentResolver().query(mImageUri,            projImage,            MediaStore.Images.Media.MIME_TYPE + "=? or " + MediaStore.Images.Media.MIME_TYPE + "=?",            new String[]{"image/jpeg", "image/png"},            MediaStore.Images.Media.DATE_MODIFIED+" desc");        if(mCursor!=null){          while (mCursor.moveToNext()) {            // 获取图片的路径            String path = mCursor.getString(mCursor.getColumnIndex(MediaStore.Images.Media.DATA));            int size = mCursor.getInt(mCursor.getColumnIndex(MediaStore.Images.Media.SIZE))/1024;            String displayName = mCursor.getString(mCursor.getColumnIndex(MediaStore.Images.Media.DISPLAY_NAME));            //用于展示相册初始化界面            if(path.contains("/storage/emulated/0/messageBoard/photoImgs")){              mediaBeen.add(new MediaBean(path,size,displayName));            }//            // 获取该图片的父路径名//            String dirPath = new File(path).getParentFile().getAbsolutePath();//            //            //存储对应关系//            if (allPhotosTemp.containsKey(dirPath)) {//              List<MediaBean> data = allPhotosTemp.get(dirPath);//              data.add(new MediaBean(path,size,displayName));////              Log.e(TAG,"getAllPhotoInfo "+data.size()+",path="+data.get(0).getPath()+",name="+data.get(0).getDisplayName());//              continue;//            } else {//              List<MediaBean> data = new ArrayList<>();//              data.add(new MediaBean(path,size,displayName));//              allPhotosTemp.put(dirPath,data);////              Log.e(TAG,"getAllPhotoInfo else "+data.size()+",path="+data.get(0).getPath()+",name="+data.get(0).getDisplayName());//            }          }          mCursor.close();        }        //更新界面        runOnUiThread(new Runnable() {          @Override          public void run() {            //...            Log.e(TAG,"mediaBeen="+mediaBeen.size());            albumAdapter = new AlbumAdapter(AvaterActivity.this,mediaBeen);            gvAlbum.setAdapter(albumAdapter);            gvAlbum.setOnItemClickListener(new AdapterView.OnItemClickListener() {              @Override              public void onItemClick(AdapterView<?> parent, View view, int position, long id) {                Intent cropIntent = new Intent(mContext, CropImgActivity.class);                cropIntent.putExtra("status",status);                cropIntent.putExtra("takepath",mediaBeen.get(position).getPath());                startActivity(cropIntent);              }            });          }        });      }    }).start();  }