Android利用ContentProvider获取本地数据的方法

query(@RequiresPermission.Read @NonNull Uri uri,
    @Nullable String[] projection, @Nullable String selection,
    @Nullable String[] selectionArgs, @Nullable String sortOrder)

String [] columnNames = mCursor.getColumnNames();

//图片类型的Uri路径
final Uri uri = MediaStore.Images.Media.EXTERNAL_CONTENT_URI;
//按照图片修改时间，筛选出jpeg和png类型的图片
Cursor mCursor =mContext.getContentResolver()
  .query(uri,null,MediaStore.Images.ImageColumns.MIME_TYPE + "=&＃63; or "+ MediaStore.Images.ImageColumns.MIME_TYPE + "=&＃63;",
  new String[]{"image/jpeg", "image/png"}, MediaStore.Images.Media.DATE_MODIFIED); 
if(mCursor!=null){

while(mCursor.moveToNext()){

//获取图片路径
String path = mCursor.getString(mCursor
    .getColumnIndex(MediaStore.Images.ImageColumns.DATA));
//获取修改日期
long date = mCursor.getLong(mCursor
    .getColumnIndex(MediaStore.Images.ImageColumns.DATE_MODIFIED));

//do something
}
}