从外部存储打开文件

Question

I am trying to use intent for open files in external storage but I don't know why is it showing me toast could not find item ! I have tried it on different files as well but it do the same , permissions I have used in manifest

 @Override
protected void onListItemClick(ListView l, View v, int position, long id) {
    super.onListItemClick(l, v, position, id);

     File temp = new File(address,mylist.get(position));

    if (temp.isFile()){
        //Toast.makeText(getApplicationContext(),"This is File !!",Toast.LENGTH_SHORT).show();
        String  sfile = temp.getPath();
        Uri uri = Uri.parse(sfile);
        Intent intent = new Intent(Intent.ACTION_VIEW);
        intent.setType("image/*");
        intent.putExtra(Intent.ACTION_VIEW,uri);
        
        startActivity(Intent.createChooser(intent,"Open file"));

    }else {

        ref(address+"/"+mylist.get(position).toString());

    }

}

Answer 1

can you show sample address value (path of the file)? there is a chance that you are keeping your files in some restricted area (eg private data folder of your app) and you have to provide FileProvider and grant Uri access permission to another app for allowing it to use your apps folder. some doc and samples in HERE and HERE

assuming could not find item ! Toast doesn't come from your app (I don't see such code) - it may be shown by another app, which just can't get access to File

all above assumes that File exists in proper directory (both isFile() and exists() returns true ) :)