Minecraft Forums

Quote from Donalddoesmc

Unfortunately no, but it is possible with pocketmine so it seems possible in ModPE (Its @player BTW)

Quote from MrARM

It is possible, thanks to the ability to read files from SD Card. Lemme give a second to find it.

EDIT:

var sdcard = android.os.Environment.getExternalStorageDirectory();
var directory = new File(sdcard.getAbsolutePath() + "/games/com.mojang");
var minecraftpe = new java.io.File(directory + "/minecraftpe/");
var userName = new java.io.File(minecraftpe, "options.txt");
var br = new java.io.BufferedReader(new FileReader(userName));
var s = br.readLine();
var line = s.split(":");

function getUsername(){

if((s = br.readLine()) != null){

return line[1];

}
br.close();
}

Quote from darkdiamondminer

Yes i noticed that already. But all i need is to understand the script so i can add that to my mod. (with permission of course)

Quote from MrARM

Because that snippet is strange. It is hard to understand.

Quote from 500 Internal Server Error

Technically, that's not Java, but ModPEScript calling Java programs.

Rhino, the scripting engine used to interpret ModPE Scripts, has a function that lets you access Java classes from ModPE Script. So the syntax is still ModPE script (e.g. variables are still var), but you can access stuff from the Java side.

(I really should make an official way of getting options)

Quote from Thecactigod

can you make an official way to make GUI too?

var sdcard = android.os.Environment.getExternalStorageDirectory();
// This variable, sdcard, is the path of the sdcard directory. For most devices it is /mnt/sdcard
var directory = new File(sdcard.getAbsolutePath() + "/games/com.mojang");
// MrARM you didnt import File, so it should be new java.io.File()
// directory is the /sdcard/games/com.mojang directory, where mcpe config and worlds are saved
var minecraftpe = new java.io.File(directory + "/minecraftpe/");
// This is the settings directory containing settings and clientId(random, for LAN multiplayer, you might find these numbers in the /worldname/players directory) TXT files
var userName = new java.io.File(minecraftpe, "options.txt");
//this variable is options.txt file
//MrARM you are giving an extremely misleading var nane...

// If you just want to get the settings file, you can skip all these annoymous lines and just do:
var optionsFile=new java.io.File(android.os.Environment.getExternalStorageDirectory()+"/games/com.mojang/minecraftpe","options.txt");

//then... idk what he is doing because line and br and s aren't global variables / fields
//So I skip it. Read mine instead below:
/*
var br = new java.io.BufferedReader(new FileReader(userName));
var s = br.readLine();
var line = s.split(":");

function getUsername(){

if((s = br.readLine()) != null){

return line[1];
*/

// MrARM meant to read the options.txt file into a string, so...

var bReader= new java.io.BufferedReader(new java.io.FileReader(optionsFile));
//this creates a reader that reads the file. Don't be misled by the word Buffered - it only matters when the text is 8196+ chars.
var line=bReader.readLine();
// The readLine() function reads the first line in the file. If you call it again, it returns the second line, vice versa, and null when the document ends. Here, username is normally located at the first line, if the client did nothing naughty about it.
var username=line.split(":")[1];
// splits the line into pieces at ":". The second piece, i.e. [1], is normally the username. So finally we get the username.
bReader.close():
// dont ask, just do it.
}

var username=new java.io.BufferedReader(new java.io.FileReader(new java.io.File(android.os.Environment.getExternalStorage()/*.getAbsolutePath() is omitable because android/rhino/whatever converts it into string automatically*/+"/games/com.mojang/minecraftpe","options.txt"))).readLine().split(":")[1];

var username=new java.io.BufferedReader(new java.io.FileReader(new java.io.File(android.os.Environment.getExternalStorage()+"/games/com.mojang/minecraftpe","options.txt"))).readLine().split(":")[1].substring(12);

Quote from MCPE_modder_for_maps

Explaining MrARM's code:

var sdcard = android.os.Environment.getExternalStorageDirectory();
// This variable, sdcard, is the path of the sdcard directory. For most devices it is /mnt/sdcard
var directory = new File(sdcard.getAbsolutePath() + "/games/com.mojang");
// MrARM you didnt import File, so it should be new java.io.File()
// directory is the /sdcard/games/com.mojang directory, where mcpe config and worlds are saved
var minecraftpe = new java.io.File(directory + "/minecraftpe/");
// This is the settings directory containing settings and clientId(random, for LAN multiplayer, you might find these numbers in the /worldname/players directory) TXT files
var userName = new java.io.File(minecraftpe, "options.txt");
//this variable is options.txt file
//MrARM you are giving an extremely misleading var nane...

// If you just want to get the settings file, you can skip all these annoymous lines and just do:
var optionsFile=new java.io.File(android.os.Environment.getExternalStorageDirectory()+"/games/com.mojang/minecraftpe","options.txt");

//then... idk what he is doing because line and br and s aren't global variables / fields
//So I skip it. Read mine instead below:
/*
var br = new java.io.BufferedReader(new FileReader(userName));
var s = br.readLine();
var line = s.split(":");

function getUsername(){

if((s = br.readLine()) != null){

return line[1];
*/

// MrARM meant to read the options.txt file into a string, so...

var bReader= new java.io.BufferedReader(new java.io.FileReader(optionsFile));
//this creates a reader that reads the file. Don't be misled by the word Buffered - it only matters when the text is 8196+ chars.
var line=bReader.readLine();
// The readLine() function reads the first line in the file. If you call it again, it returns the second line, vice versa, and null when the document ends. Here, username is normally located at the first line, if the client did nothing naughty about it.
var username=line.split(":")[1];
// splits the line into pieces at ":". The second piece, i.e. [1], is normally the username. So finally we get the username.
bReader.close():
// dont ask, just do it.
}

Challenge 1: can you get them all in one line?
Challenge 2: Some players have the character : in their username. Then, the piece from : on. Can you use the for loop and the function username.substring() to achieve it?
Answer for the challenges:

Answer for challenge 1:

var username=new java.io.BufferedReader(new java.io.FileReader(new java.io.File(android.os.Environment.getExternalStorage()/*.getAbsolutePath() is omitable because android/rhino/whatever converts it into string automatically*/+"/games/com.mojang/minecraftpe","options.txt"))).readLine().split(":")[1];

Answer for challenge 2:

Two methods:
1. Use for loop to find the offset of the first : and do line.substring(offsetA);
2. Find the offset yourself: line.substring(12).

var username=new java.io.BufferedReader(new java.io.FileReader(new java.io.File(android.os.Environment.getExternalStorage()+"/games/com.mojang/minecraftpe","options.txt"))).readLine().split(":")[1].substring(12);

Edit: It seemed to be readLine() not read(). You can learn more about BufferedReader functions at http://developer.android.com/reference/java/io/BufferedReader.html

Edit again: yes read() reads a single character but readLine() reads the file content until meeting the characters \n, \r, \r\n or end or document.

java.io*