Accessing the music library on the device

Android Processing

metamondo

Accessing the music library on the device

in Android Processing • 3 months ago

Can Processing access the music library on the user's device - Android phone or Android tablet?

I would like to create a simple player app that goes through the music library on the user's device and then plays, for example, 2 rock songs followed by 2 rap songs followed by 2 jazz songs etc.

Is this possible using Processing?

I'd be grateful if anybody can point me to a book or some online resources that explain how to do this as none of the teaching materials I have consulted addresses this topic.

PS I am a Processing nube - but with some Flash ActionScript experience!

Replies(6)

amnon.owed

Re: Accessing the music library on the device

3 months ago

See: https://forum.processing.org/topic/where-to-place-threads-and-other-forum-practices

Removed double post in Programming Questions as Android-related questions belong here.

PhiLho

Re: Accessing the music library on the device

3 months ago

Do Android devices have a concept of global "music library"? I would think it actually depend on the music player present on the device, itself perhaps depending on the brand of device, custom Android system, etc. I can be wrong, not knowing Android programming.

GoToLoop

Re: Accessing the music library on the device

3 months ago

I dunno whether those mobile OSes got some kinda global music library either.

All I know is that they sure got a global phone contact list library!

Thus those OSes are potentially spy-able from the get-go!

Jesse Sco..

Re: Accessing the music library on the device

3 months ago

Here's an example that allows you to drill down from the /SdCard/Music directory into a band, then album, then allows you to play a file. Little bit hacky, as it was quickly developed, but it should be a start.

Copy code

/*
*
* GrabAudioFromDevice
* Uses MediaPlayer Class to play audio files
* Also showcases Directory Functionality
* Requires VIBRATE Permsission
*
*/
//-----------------------------------------------------------------------------------------
// IMPORTS
import android.content.Context;
import android.app.Activity;
import android.os.Bundle;
import android.os.Environment;
import android.app.Notification;
import android.app.NotificationManager;
import android.media.MediaPlayer;
import android.media.MediaPlayer.OnCompletionListener;
import java.io.BufferedReader;
import java.io.File;
import java.io.FileReader;
import java.io.IOException;
//-----------------------------------------------------------------------------------------
// DECLARATIONS
MediaPlayer mPlayer; // Our Player, which we will reset and use over and over
MyCompletionListener listener; // Our Completion Listener, which will tell us when a song is done
NotificationManager gNotificationManager; // Vibration Mangager
Notification gNotification; // Our Vibration Action
//-----------------------------------------------------------------------------------------
// GLOBAL VARIABLES
String[] fontList;
PFont androidFont;
long[] gVibrate = {0, 50, 0, 50, 0, 50}; // Our Vibration Pattern
int touchNumber = -1;
ArrayList songs;
ArrayList directories;
boolean isDirectory;
boolean isInitialDirectory = true;
boolean isSecondaryDirectory;
boolean isTertiaryDirectory;
boolean isPlaying;
int yDiv, yFactor;
int ySpacing = 75;
String currentSong;
String currentFolder, initialFolder, secondaryFolder, tertiaryFolder;
String path;
//-----------------------------------------------------------------------------------------
void setup() {
// Screen
size(displayWidth, displayHeight, P2D);
orientation(LANDSCAPE);
fill(255);
// Text
fontList = PFont.list();
androidFont = createFont(fontList[4], 32, true);
textFont(androidFont);
// Player + Listener
mPlayer = new MediaPlayer();
listener = new MyCompletionListener();
mPlayer.setOnCompletionListener(listener);
// Lists
songs = new ArrayList();
directories = new ArrayList();
print("about to load path");
// Files
path = "//sdcard//Music//";
currentFolder = "//sdcard//Music//";
initialFolder = "//sdcard//Music//";
File file = new File(path);
final File folder = new File(path);
// Call Our List Function
listFilesForFolder(folder);
println("-- End Of Setup --");
}
//-----------------------------------------------------------------------------------------
public void listFilesForFolder(final File folder) {
for (int i = 0; i < folder.listFiles().length; i++) {
// Cast Each Item In The Folder As A File
File fileEntry = folder.listFiles()[i];
// Test If It Is A Directory
if(fileEntry.isDirectory()) {
println("Directory #" + i + " is " + fileEntry.getName());
// Add To ArrayList
directories.add(fileEntry.getName());
// Update Our Scaling
yDiv = directories.size();
yFactor = height / yDiv;
}
// Otherwise They're Files
else {
println("File #" + i + " is " + fileEntry.getName());
// Add To ArrayList
songs.add(fileEntry.getName());
// Update Our Scaling
yDiv = songs.size();
yFactor = height / yDiv;
}
}
}
//-----------------------------------------------------------------------------------------
void draw() {
background(0);
// Our Initial Directory Of Artists
if(isInitialDirectory) {
for(int i = 0; i < directories.size(); i++) {
// Cast Our Item As A String
String dir = (String) directories.get(i);
text(dir , width/8 , yFactor * (i + 1));
}
}
// Our Secondary Directory Of Albums
else if(isSecondaryDirectory) {
for(int i = 0; i < directories.size(); i++) {
// Cast Our Item As A String
String dir = (String) directories.get(i);
text(dir , width/8 , ySpacing + (ySpacing * (i + 1)));
}
}
// Our Tertiary Directory Of SOngs
else if(isTertiaryDirectory) {
for(int i = 0; i < songs.size(); i++) {
// Cast Our Item As A String
String song = (String) songs.get(i);
// Colour Our Selection
if(touchNumber == i) {
fill(255, 0, 0);
}
else {
fill(255);
}
text(song , width/8 , yFactor * (i + 1));
}
}
}
//-----------------------------------------------------------------------------------------
void mousePressed() {
println("MOUSE PRESSED");
// Vibrate
gNotificationManager.notify(1, gNotification);
// If We Are Still In The First Directory
if(isInitialDirectory) {
println("INITIAL");
// Get Y Position & Match To Folder ID
int id = mouseY / yFactor;
// Cast Our Matching ArrayList Position To A String
String dir = (String) directories.get(id);
path += dir;
println("The Selected Item Is " + path);
// Store Our Location
currentFolder = path;
secondaryFolder = path;
// Cast Our String As A Folder
final File folder = new File(path);
// Clear Our ArrayList
directories.clear();
// List Files For Our Folder
listFilesForFolder(folder);
println("Loading File Structure For " + folder);
// Set Our Directories
isInitialDirectory = false;
isSecondaryDirectory = true;
}
// If We Are In The Second Directory
else if(isSecondaryDirectory) {
println("SECONDARY");
// Get Y Position & Match To Folder ID
int id = (mouseY / ySpacing) - 1;
// Make Sure We Are Within Range
if(id <= directories.size()) {
// Cast Our Matching ArrayList Position To A String
String dir = (String) directories.get(id);
path += "//";
path += dir;
println("The Selected Item Is " + path);
// Store Our Location
currentFolder = path;
tertiaryFolder = path;
// Cast Our String As A Folder
final File folder = new File(path);
// Clear Our ArrayList
directories.clear();
// List Files For Our Folder
listFilesForFolder(folder);
println("Loading File Structure For " + folder);
// Set Our Directories
isInitialDirectory = false;
isSecondaryDirectory = false;
isTertiaryDirectory = true;
}
}
// If We Are Looking At Files
else if(isTertiaryDirectory) {
println("TERTIARY");
// Get Y Position & Match To Folder ID
int id = mouseY / yFactor;
println("ID " + id);
touchNumber = id;
// Cast Our Matching ArrayList Position To A String
String song = (String) songs.get(id);
// Set Our Directories
isInitialDirectory = false;
isSecondaryDirectory = false;
isTertiaryDirectory = true;
// Reset
if(mPlayer.isPlaying()) {
mPlayer.reset();
}
// Play
playFile(song);
}
}
//-----------------------------------------------------------------------------------------
@Override
void onResume() {
super.onResume();
// Notification Manager
gNotificationManager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
gNotification = new Notification();
gNotification.vibrate = gVibrate;
}
//---
@Override
protected void onPause() {
super.onPause();
// Release the Media Player
if(mPlayer != null) {
mPlayer.release();
mPlayer = null;
}
}
//-----------------------------------------------------------------------------------------
import android.media.MediaPlayer.OnCompletionListener;
public class MyCompletionListener implements MediaPlayer.OnCompletionListener {
// Resets MediaPlayer So It Doesn't Play Over + Over
public void onCompletion(MediaPlayer mPlayer) {
// Reset
mPlayer.reset();
// Increment Play Count
touchNumber++;
// Get Path
String song = (String) songs.get(touchNumber);
// Play
playFile(song);
}
}
//-----------------------------------------------------------------------------------------
void playFile(String song) {
try {
// Store Just The Song
currentSong = song;
println("The Selected Item Is " + song);
// Add The Song To The Path
song = currentFolder + "//" + song;
println("And Now It Is " + song);
// Set The Player
mPlayer.setDataSource(song);
mPlayer.setLooping(false);
mPlayer.prepare();
mPlayer.start();
}
catch (IOException e) {
println("#FAIL");
e.printStackTrace();
}
}
void stopPlaying() {
if(mPlayer != null) {
mPlayer.release();
mPlayer = null;
}
}

Let me know if you have any questions - it's a lot of code.

metamondo

Re: Re: Accessing the music library on the device

3 months ago

Thanks Jesse! Looks VERY promising - will play around with it over the next few days and see what I can do with it.

metamondo

Re: Accessing the music library on the device

3 months ago

Having problems with the vibrate permission - not sure I understand why you're suggesting using that...?

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