Main.java Source code

Introduction

Here is the source code for Main.java

Source

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

import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;

import java.io.IOException;

public class Main {

    public static String readFile(Context context, String fileName) {
        if (!exists(context, fileName)) {
            return null;
        }
        FileInputStream fis = null;
        String content = null;
        try {
            fis = context.openFileInput(fileName);
            if (fis != null) {

                byte[] buffer = new byte[1024];
                ByteArrayOutputStream arrayOutputStream = new ByteArrayOutputStream();
                while (true) {
                    int readLength = fis.read(buffer);
                    if (readLength == -1)
                        break;
                    arrayOutputStream.write(buffer, 0, readLength);
                }
                fis.close();
                arrayOutputStream.close();
                content = new String(arrayOutputStream.toByteArray());

            }
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
            content = null;
        } finally {
            try {
                if (fis != null)
                    fis.close();
            } catch (IOException ioe) {
                ioe.printStackTrace();
            }
        }
        return content;
    }

    public static String readFile(String filePath) {
        if (filePath == null || !new File(filePath).exists()) {
            return null;
        }
        FileInputStream fis = null;
        String content = null;
        try {
            fis = new FileInputStream(filePath);
            if (fis != null) {

                byte[] buffer = new byte[1024];
                ByteArrayOutputStream arrayOutputStream = new ByteArrayOutputStream();
                while (true) {
                    int readLength = fis.read(buffer);
                    if (readLength == -1)
                        break;
                    arrayOutputStream.write(buffer, 0, readLength);
                }
                fis.close();
                arrayOutputStream.close();
                content = new String(arrayOutputStream.toByteArray());

            }
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
            content = null;
        } finally {
            try {
                if (fis != null)
                    fis.close();
            } catch (IOException ioe) {
                ioe.printStackTrace();
            }
        }
        return content;
    }

    public static boolean exists(Context context, String fileName) {
        return new File(context.getFilesDir(), fileName).exists();
    }
}