# fileInput class android, pick Folder or File

**URL:** https://discourse.processing.org/t/fileinput-class-android-pick-folder-or-file/30148
**Category:** Gallery
**Created:** [May 18, 2021, 6:52am UTC](https://discourse.processing.org/t/fileinput-class-android-pick-folder-or-file/30148 "2021-05-18T06:52:15Z")
**Posts on this page:** 2
**Page:** 1

<div class="post-metadata">

### Author: ![paulgoux](https://avatars.discourse-cdn.com/v4/letter/p/b9bd4f/32.png) [@paulgoux](https://discourse.processing.org/u/paulgoux)
#### Post date: [May 18, 2021, 6:52am UTC](https://discourse.processing.org/t/fileinput-class-android-pick-folder-or-file/30148/1 "2021-05-18T06:52:15Z")

</div>

Here is a class to handle file input in android.

here is the base sketch;

> **Summary**
>
> ```auto
> import android.app.Activity;
> import android.content.Intent;
> import processing.core.PApplet;
> import android.os.Bundle;
> import android.os.Environment;
> import android.content.Context;
> import android.provider.MediaStore;
> import android.net.Uri;
> import android.graphics.BitmapFactory;
> import android.database.Cursor;
> import android.os.Build.VERSION_CODES;
> import android.os.Build;
> import android.graphics.Bitmap; 
> 
> fileInput f;
> void setup() {
> f = new fileInput(this);
> //set image to true for images
> //set folder to true for directory picker please make sure you install a file browser on android
> f.folder = true;
> };
> 
> void draw() {
> f.displayImage();
> };
> 
> void mousePressed() {
> 
> f.getItem();
> };
> 
> //@Override
> public void onActivityResult(int requestCode, int resultCode, Intent data) {
> f.handleActivity(requestCode,resultCode,data);
> };
> 
> ```

> **Summary**
>
> ```auto
> class fileInput extends PApplet {
> PApplet p;
> boolean folder, file, imageLoaded, image, audio, video, getPermission = true;
> String location, folderPath, fileName, absolutePath, fileContent, ext;
> PImage img;
> Activity act;
> Context context;
> Permission wStorage;
> ArrayList<String>Files = new ArrayList<String>();
> ArrayList<String>images = new ArrayList<String>();
> ArrayList<String>audioFiles = new ArrayList<String>();
> ArrayList<String>textFiles = new ArrayList<String>();
> ArrayList<String>videoFiles = new ArrayList<String>();
> ArrayList<String>otherFiles = new ArrayList<String>();
> 
> fileInput(PApplet app) {
> p = app;
> init();
> };
> 
> void init() {
> wStorage = new Permission(p, "WRITE_EXTERNAL_STORAGE");
> absolutePath = Environment.getExternalStorageDirectory().getAbsolutePath();
> getPermission = false;
> act = p.getActivity(); 
> context = act.getApplicationContext();
> };
> 
> void getItem() {
> openImageExplorer();
> getFolder();
> getFile();
> };
> 
> public void openImageExplorer() {
> if (image) {
> Intent intent = new Intent(Intent.ACTION_PICK, android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
> intent.setType("image/*");
> act.startActivityForResult(intent, 1);
> };
> };
> 
> void getFolder() {
> if (folder) {
> if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.LOLLIPOP) { 
> Intent intent = new Intent(Intent.ACTION_OPEN_DOCUMENT_TREE);
> act.startActivityForResult(intent, 9999);
> }
> }
> };
> 
> void getFile() {
> if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.LOLLIPOP) { 
> Intent chooseFile;
> Intent intent;
> chooseFile = new Intent(Intent.ACTION_GET_CONTENT);
> chooseFile.setType("file/*");
> intent = Intent.createChooser(chooseFile, "Choose a file");
> act.startActivityForResult(intent, 9999);
> }
> };
> 
> void handleActivity(int requestCode, int resultCode, Intent data) {
> activityResult(requestCode, resultCode, data);
> activityResultImage(requestCode, resultCode, data);
> onActivityResultFile(requestCode, resultCode, data);
> };
> 
> public void activityResult(int requestCode, int resultCode, Intent data) {
> if (folder) {
> onActivityResult(requestCode, resultCode, data);
> 
> switch(requestCode) {
> case 9999:
> String s1 = data.getData().toString();
> int i = s1.indexOf("primary%");
> s1 = s1.substring(i+10, s1.length());
> s1 = absolutePath +"/"+s1;
> s1 = s1.replace("%2F", "/");
> println("Test", "path" + s1);
> listFiles(s1);
> 
> break;
> }
> }
> };
> 
> public void activityResultImage(int requestCode, int resultCode, Intent data) {
> if (image) {
> onActivityResult(requestCode, resultCode, data);
> if (requestCode == 1) {
> if (resultCode == -1) {
> if (data != null) {
> Uri image_uri = data.getData();
> String[] filePathColumn = { MediaStore.Images.Media.DATA };
> Cursor cursor = context.getContentResolver().query(image_uri, filePathColumn, null, null, null);
> cursor.moveToFirst();
> int var7 = cursor.getColumnIndex(filePathColumn[0]);
> String imgDecodableString = cursor.getString(var7);
> cursor.close();
> PApplet.println(imgDecodableString);
> if (Build.VERSION.SDK_INT >= 28) {
> try {
> InputStream ips = context.getContentResolver().openInputStream(image_uri);
> Bitmap bitmap = BitmapFactory.decodeStream(ips);
> img = new PImage(bitmap.getWidth(), bitmap.getHeight(), 2);
> bitmap.getPixels(img.pixels, 0, img.width, 0, 0, img.width, img.height);
> img.updatePixels();
> imageLoaded = true;
> PApplet.println("success", img.width, img.height);
> } 
> catch (Exception e) {
> e.printStackTrace();
> }
> } else {
> img = p.loadImage(imgDecodableString);
> imageLoaded = true;
> PApplet.println("success", img.width, img.height);
> }
> } else {
> PApplet.println("No data");
> }
> }
> }
> }
> };
> 
> public void onActivityResultFile(int requestCode, int resultCode, Intent data) {
> if (file&&!image&&!audio&&!video) {
> onActivityResult(requestCode, resultCode, data);
> 
> switch(requestCode) {
> case 9999:
> String s1 = data.getData().toString();
> int i = s1.indexOf("external_files");
> s1 = s1.substring(i+15, s1.length());
> s1 = absolutePath +"/"+s1;
> s1 = s1.replace("%2F", "/");
> setLocation(s1);
> loadFile(s1);
> println("Test", "path " + s1);
> break;
> }
> }
> };
> 
> String[] listFiles(String s1) {
> String []s = null;
> String path = s1;
> println("Files", "Path: " + path);
> File directory = new File(path);
> File[] files = directory.listFiles();
> if (files!=null) {
> s = new String [files.length];
> println("Files", "Size: "+ files.length);
> for (int i = 0; i < files.length; i++)
> {
> s[i] = files[i].getName();
> Files.add(s[i]);
> filterAll(s[i]);
> 
> println("Files", "FileName: " + files[i].getName());
> }
> }
> println("Images", images.size());
> println("text", textFiles.size());
> println("Audio", audioFiles.size());
> println("Other", otherFiles.size());
> return s;
> };
> 
> void filterAll(String s) {
> filterImage(s);
> filterText(s);
> filterAudio(s);
> filterVideo(s);
> filterOthers(s);
> };
> 
> void filterImage(String s) {
> if (s.contains("jpg")
> ||s.contains("JPG")
> ||s.contains("bmp")
> ||s.contains("BMP")
> ||s.contains("png")
> ||s.contains("PNG")
> ||s.contains("gif")
> ||s.contains("GIF")) {
> if (!images.contains(s))images.add(s);
> }
> };
> 
> void filterText(String s) {
> if (s.contains("txt")
> ||s.contains("doc")
> ||s.contains("docx")
> ||s.contains("csv")) {
> if (!textFiles.contains(s))textFiles.add(s);
> }
> };
> 
> void filterAudio(String s) {
> if (s.contains("ogg")
> ||s.contains("mp3")
> ||s.contains("wav")) {
> if (!audioFiles.contains(s))audioFiles.add(s);
> }
> };
> 
> void filterVideo(String s) {
> if (s.contains("mp4")
> ||s.contains("wmv")
> ||s.contains("avi")
> ||s.contains("mkv")) {
> if (!videoFiles.contains(s))videoFiles.add(s);
> }
> };
> 
> void filterOthers(String s) {
> if (!images.contains(s)
> &&!textFiles.contains(s)
> &&!videoFiles.contains(s)
> &&!audioFiles.contains(s)) {
> if (!otherFiles.contains(s))otherFiles.add(s);
> }
> };
> 
> String loadFile(String s) {
> println("test Location",location);
> FileInputStream fis = null;
> try {
> fis = new FileInputStream (new File(s));
> println("try reading file");
> InputStreamReader isr = new InputStreamReader(fis);
> // READ STRING OF UNKNOWN LENGTH
> StringBuilder sb = new StringBuilder();
> char[] inputBuffer = new char[2048];
> int l;
> // FILL BUFFER WITH DATA
> while ((l = isr.read(inputBuffer)) != -1) {
> sb.append(inputBuffer, 0, l);
> println("write data", inputBuffer, 0, l);
> }
> // CONVERT BYTES TO STRING
> fileContent = sb.toString();
> println("file",fileName+"."+ext,fileContent);
> fis.close();
> }
> catch (Exception e) {
> println("cannot fetch file", e);
> } 
> finally {
> if (fis != null) {
> 
> fis = null;
> }
> }
> return fileContent;
> };
> 
> void setLocation(String s) {
> location = s;
> folderPath = s.substring(0, s.lastIndexOf("/"));
> fileName = s.replace(folderPath+"/", "");
> getExt(fileName);
> PApplet.println("Fname", folderPath);
> PApplet.println("fileName", fileName);
> PApplet.println("ext", ext);
> init();
> }
> 
> void getExt(String location) {
> 
> int count = 0;
> fileName = location.substring(0, location.indexOf("."));
> ext = location.replace(fileName, "");
> ext = ext.replace(".", "");
> ext = ext.replace(fileName, "");
> };
> 
> void displayImage() {
> if (imageLoaded) {
> p.image(img, 0, 0);
> }
> };
> 
> void displayImage(int x, int y) {
> if (imageLoaded) {
> p.image(img, x, y);
> }
> };
> 
> void displayImage(PGraphics p, int x, int y) {
> if (imageLoaded) {
> p.image(img, x, y);
> }
> };
> 
> void readContents() {
> if (f.fileContent!=null) {
> p.fill(255,0,0);
> p.text(f.fileContent, 20, 40);
> } else {
> p.fill(0,255,0);
> p.text("no file", 20, 20);
> }
> };
> };
> 
> ```

permission class

> **Summary**
>
> ```auto
> public class Permission{
>   
> PApplet parent;
> String p;
> 
> public Permission(PApplet pParent,String permissionName) {
> parent = pParent;
> p = permissionName;
> parent.requestPermission("android.permission."+permissionName, "onPermissionResult", this);
> };
> 
> public void onPermissionResult(boolean granted) {
> if (!granted) {
> PApplet.println("User did not grant", p ,"permission.", p ,"is disabled.");
> }
> };
> 
> };
> 
> ```

if folder is selected, once you allow android access to your folder it will dump the names of the files into its respective folders.

```auto
ArrayList<String>Files = new ArrayList<String>();
  ArrayList<String>images = new ArrayList<String>();
  ArrayList<String>audioFiles = new ArrayList<String>();
  ArrayList<String>textFiles = new ArrayList<String>();
  ArrayList<String>videoFiles = new ArrayList<String>();
  ArrayList<String>otherFiles = new ArrayList<String>();

```

if `image` is set to true when you pick an image it will automatically be loaded into its local variable `img` for easy reading, same with textFiles with the contents being loaded into `fileContents`.

I’ll update with into my lib later. Now we can fully access android files and folders on android without much hastle.

---

<div class="post-metadata">

### Author: ![paulgoux](https://avatars.discourse-cdn.com/v4/letter/p/b9bd4f/32.png) [@paulgoux](https://discourse.processing.org/u/paulgoux)
#### Post date: [May 18, 2021, 7:17am UTC](https://discourse.processing.org/t/fileinput-class-android-pick-folder-or-file/30148/2 "2021-05-18T07:17:26Z")

</div>

and here it is with the fileWriter library (please note this handles reading and writing).

```auto
import android.content.Intent;
BMScontrols b;
fileInput f;
void setup() {
  size(600,600,P2D);
  b = new BMScontrols(this,true);
  f = new fileInput(this);
  f.file = true;
};

void draw() {
  background(255);
  f.displayImage();
  f.readContents();
};

void mousePressed() {
  f.getItem();
};

//@Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
  f.handleActivity(requestCode,resultCode,data);
};

```

files updated on github.  
please note you do not need ketai unless you are making use of the camera class.

> **[paulgoux/fileWriter-Android](https://github.com/paulgoux/fileWriter-Android)**
>
> file writer reader for android. Contribute to paulgoux/fileWriter-Android development by creating an account on GitHub.