Main.java Source code

Introduction

Here is the source code for Main.java

Source

//package com.java2s;
//License from project: Apache License 

import android.util.Log;

import java.io.File;

import java.io.FileNotFoundException;

import java.io.FileReader;
import java.io.IOException;

import java.io.LineNumberReader;

public class Main {
    public static String getRandomNumByLine(int i) {
        File file = new File("/storage/emulated/0/uber_random");
        LineNumberReader lineNumberReader = null;
        StringBuilder builder = new StringBuilder();
        try {
            if (file.exists()) {
                lineNumberReader = new LineNumberReader(new FileReader(file));
                String tmp = null;
                while ((tmp = lineNumberReader.readLine()) != null) {
                    builder.append(tmp + "\n");
                }
            }
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            if (null != lineNumberReader) {
                try {
                    lineNumberReader.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        }
        String fileString = builder.toString();
        Log.d("TAG", "Read num is --->" + fileString);
        String[] split = fileString.split("\\n");
        if (split != null && (split.length >= i)) {
            String value = split[i];
            Log.d("TAG", "Read sub is --->" + value);
            return value;
        }
        return null;
    }
}