Main.java Source code

Introduction

Here is the source code for Main.java

Source

//package com.java2s;
import android.content.Context;

import java.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;

import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;

public class Main {

    public static String readFile(Context mContext, String file, String code) {
        int len = 0;
        byte[] buf = null;
        String result = "";
        try {
            InputStream in = mContext.getAssets().open(file);
            len = in.available();
            buf = new byte[len];
            in.read(buf, 0, len);

            result = new String(buf, code);
        } catch (Exception e) {
            e.printStackTrace();
        }
        return result;
    }

    /**
     * read file
     *
     * @param charsetName The name of a supported {@link java.nio.charset.Charset
     *                    </code>charset<code>}
     * @return if file not exist, return null, else return content of file
     * @throws RuntimeException if an error occurs while operator BufferedReader
     */
    public static String readFile(File file, String charsetName) {
        StringBuilder fileContent = new StringBuilder("");
        if (file == null || !file.isFile()) {
            return fileContent.toString();
        }

        BufferedReader reader = null;
        try {
            InputStreamReader is = new InputStreamReader(new FileInputStream(file), charsetName);
            reader = new BufferedReader(is);
            String line = null;
            while ((line = reader.readLine()) != null) {
                if (!fileContent.toString().equals("")) {
                    fileContent.append("\r\n");
                }
                fileContent.append(line);
            }
            reader.close();
        } catch (IOException e) {
            throw new RuntimeException("IOException occurred. ", e);
        } finally {
            if (reader != null) {
                try {
                    reader.close();
                } catch (IOException e) {
                    throw new RuntimeException("IOException occurred. ", e);
                }
            }
        }
        return fileContent.toString();
    }

    public static String readFile(String filePath, String charsetName) {
        return readFile(new File(filePath), charsetName);
    }

    public static String readFile(File file) {
        return readFile(file, "utf-8");
    }
}