Android loadImage outside sketch folder.

noel

Hi. I am trying to load an image with the code below, but this will give the error:

The method loadImage(String) in the type PApplet is not applicable for the arguments (File) >

How to do this? Thanks.

import android.os.Environment;

   PImage img;
   File f;

   String baseDir = Environment.getExternalStorageDirectory().getAbsolutePath() + "/imgFolder";
   String fileName = "noel_28_5_2018_9_9.png";
   f = new File(baseDir + "/" + fileName); 
   img = loadImage(f);

kfrajer

f.getAbsolutePath(); //Untested but it should work. Don't forget to enable the relevant permission.

Consider moving to the new forum.

@akenaton I hope to see ya in the "nouveau" forum as well.

Kf

noel

@kfrajer Thanks for the hint. My next question wll be on the new forum. As for this topic, I do not understand what you mean. If I use a println(f); It gives the exact location: /storage/emulated/0/imgFolder/noel_28_5_2018_9_9.png. The sketch does not give any errors when out-commented the loadImage(f);.

kfrajer

When you use print, it is very likely the print function is invoking the toString() method associated to the Objec class. In turned, this function overriden by the File class. I am not totally sure loadImage() can handle objects of type File. Generating the proper string path should work.

Kf

akenaton

@noel===

with P5 loadimage() waits for a String and with your code you give it a File object: that is the problem...Where is your imgFolder???? in your app??? on the sdCard???

@kfrajer === i am on the new forum where i put a post for a weird problem i got with standard processing (no android)...Still unsolved; must be a processing bug : if you get some idea, it s in the "uncategorized" category!

EDIT: no it migrates here https://discourse.processing.org/t/strange-results-when-exporting/288

noel

@akenaton. Yes of course you are wright. It was just a hopeless try. Because using a String like

"/storage/emulated/0/imgFolder/noel_28_5_2018_9_9.png"

gives the error:

java.lang.IllegalArgumentException: File /storage/emulated/0/imgFoldernoel_28_5_2018_9_9.png contains a path separator

On the other hand saving a file to the internal storage, not specifically the sketch folder, works pretty well. I have tried a lot of other things but they are to foolish to be posted. I hope you have some idea, because I already have a headache.

akenaton

@noel===

i ll post some snippet tomorrow here.

noel

Thanks!

noel

Thanks!

kfrajer

Check these:

https://forum.processing.org/two/discussion/comment/118947/#Comment_118947

https://forum.processing.org/two/discussion/comment/120203/#Comment_120203

Also

https://github.com/processing/processing-android/issues/450

Kf

noel

@kfrajer @akenaton

Afterall so simple. Thanks!

import android.os.Environment;

PImage img;

void setup(){
String baseDir = Environment.getExternalStorageDirectory().getAbsolutePath() + "/imgFolder";
String fileName = "noel_28_5_2018_9_9.png";
String fileToOpen = baseDir + "/" + fileName;
img = loadImage(fileToOpen);
set(0,0,img);
}

kfrajer

Great, thxs for sharing your solution. To clarify on your approach, do you create the imgFolder ahead of time? Sorry, I would test it myself but I don't have resources setup atm.

Kf

noel

@kfrajer Yes with this code I verify and create a new directory.if necessary

import android.os.Environment;

  try {
    String directory = new String(Environment.getExternalStorageDirectory().getAbsolutePath() + "/imgFolder");
    File Folder = new File(directory);
    if (!Folder.exists()) {
      boolean success = true;
       success = Folder.mkdirs();
    }
  } catch (Exception e) {
     println("Error while creating directory:" + e);
  }

kfrajer

@noel Thxs for sharing your full solution.

@akenaton: For that bug, it seems one needs to dig into the source code. I give it a try tomorrow or Thursday.

Kf