using loadStrings to read a json file in my data folder.

Android Processing

edapxx

using loadStrings to read a json file in my data folder.

in Android Processing • 10 months ago

I'm witting an application called "cursor".

In my /home/me/sketchbook/cursor/data folder I've put a JSON file called "de_DE.json", and I've give to this folder 777 recursively permission.

I'm trying to load this file with this code:

String BASE_URL = "de_DE.json";

String response = loadStrings(BASE_URL)[0];

In Java mode the app is working without problem, but in android mode the application can't find the file.

Is someone having an idea about this issue?

Many thanks in advance.

Replies(5)

PhiLho

Re: using loadStrings to read a json file in my data folder.

10 months ago

Is this code in setup()?

edapxx

Re: using loadStrings to read a json file in my data folder.

10 months ago

Hi PhiLho, yes the call is in the setup method.

I've solved the problem using Eclipse automatic corrector, but the code looks terrible, I'm now reading something about java exception to improve it.

The problem was related to Java syntax, and not to a "file not found error".

Here the code I was running before, works in Java mode, report an error in android mode:

"unreported exception org.json.JSONException, must be caught or declared to be thrown"

import org.json.*;
Dictionary dictionary;
void setup(){
dictionary = new Dictionary("de_DE");
println(dictionary.verb_list);
}
class Dictionary{
String lang;
JSONObject verb_list;
Dictionary(String defLang){
lang = defLang;
verb_list = get_dictionary();
}
//Load Json file
JSONObject get_dictionary(){
String response = loadStrings(lang+".json")[0];
// Make sure we got a response.
if ( response != null ) {
JSONObject verb_list = new JSONObject( response );
return verb_list;
}
else{
JSONObject verb_list = new JSONObject();
print("json file not loaded");
return verb_list;
}
};
}

As soon as I find a clear way to read json file in both the environments, i will write the code here. Any hints is appreciated.

edapxx

Re: using loadStrings to read a json file in my data folder.

10 months ago

This is the class updated. I hope that someone can find this code useful to load json files.

import org.json.*;
void setup(){
//in my data folder, i've a file called "de_DE.json"
dictionary = new Dictionary("de_DE");
}
class Dictionary{
String lang;
String loadedFile;
JSONObject verb_list;
Dictionary(String defLang){
lang = defLang;
verb_list = get_dictionary();
}
public JSONObject get_dictionary(){
JSONObject verb_list = null;
try {
String loaded_file = loadStrings(lang+".json")[0];
verb_list = new JSONObject( loadedFile );
} catch (Exception e) {
e.printStackTrace();
}
return verb_list;
}
}

mr.t

Re: using loadStrings to read a json file in my data folder.

9 months ago

thanx a lot.

small typo there. corrected version below.

String loadedFile = loadStrings(lang+".json")[0];
verb_list = new JSONObject( loadedFile );

mr.t

Re: using loadStrings to read a json file in my data folder.

9 months ago

and just to save other people a headache.

If you try to acces JSONArrays like the Facebook App "Give Me My Data" spits out.

it should more or less look like this:

String lang;
String loadedFile;
JSONArray obj_list;
public Dictionary(PApplet p,String defLang){
this.p = p;
lang = defLang;
}
public JSONArray get_array(){
try {
loadedFile = p.join(p.loadStrings(lang+".json")," ");
obj_list = new JSONArray ( loadedFile );
} catch (Exception e) {
e.printStackTrace();
}
return obj_list;
}
public JSONObject[] get_objects(){
JSONArray theArray = get_array();
JSONObject[] objects = new JSONObject[theArray.length()];
for(int i=0;i<theArray.length();i++)
try{
objects[i] = theArray.getJSONObject(i);
} catch (Exception e){
e.printStackTrace();
}
return objects;
}

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