Android获取系统相册所有图片

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直接获取所有照片的信息，而不是打开照片选择页面

 private ArrayList<CategoryFile> queryCategoryFilesSync(FileType type) {
   ArrayList<CategoryFile> files = new ArrayList<>();
   Uri uri = MediaStore.Images.Media.getContentUri("external");
   if (uri != null) {
       String[] projection = new String[]{FileColumns._ID, // id
               FileColumns.DATA, // 文件路径
               FileColumns.SIZE, // 文件大小
               FileColumns.DATE_MODIFIED}; // 修改日期
       Cursor cursor = getContentResolver().query(uri, projection, null, null, null);
       if (cursor != null) {
           try {
               if (cursor.moveToFirst()) {
                   final int pathIdx = cursor
                           .getColumnIndex(FileColumns.DATA);
                   final int sizeIdx = cursor
                           .getColumnIndex(FileColumns.SIZE);
                   final int modifyIdx = cursor
                           .getColumnIndex(FileColumns.DATE_MODIFIED);
                   do {
                       String path = cursor.getString(pathIdx);
                       CategoryFile file = new CategoryFile();
                       file.mType = type;
                       file.mPath = path;
                       file.mParent = FileUtil.getPathFromFilepath(file.mPath);
                       file.mName = FileUtil.getNameFromFilepath(file.mPath);
                       file.mSize = cursor.getLong(sizeIdx);
                       file.mLastModifyTime = cursor.getLong(modifyIdx);
                       files.add(file);
                   } while (cursor.moveToNext());
               }
           } catch (Exception e) {
               e.printStackTrace();
           } finally {
               cursor.close();
           }
       }
   }
   return files;
}

其中CategoryFile为存储照片信息的Bean类

FileUtil类

public class FileUtil {

    private static final char UNIX_SEPARATOR = '/';

    public static String getPathFromFilepath(String filepath) {
        if (!TextUtils.isEmpty(filepath)) {
            int pos = filepath.lastIndexOf(UNIX_SEPARATOR);
            if (pos != -1) {
                return filepath.substring(0, pos);
            }
        }
        return "";
    }

    public static String getNameFromFilepath(String filepath) {
        if (!TextUtils.isEmpty(filepath)) {
            int pos = filepath.lastIndexOf(UNIX_SEPARATOR);
            if (pos != -1) {
                return filepath.substring(pos + 1);
            }
        }
        return "";
    }
}