//package com.application.esmaker.utils;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import android.content.Context;
import android.util.Log;
import android.widget.Toast;
public class ReadWriteFileManager {
public void start(Context cx) {
final String TEMP_FILE_NAME = "temp.txt";
String contentToWrite = "THIS IS THE CONTENT TO WRITE!";
Log.d("DEBUG", "Instantiating ReadWriteManager..");
ReadWriteFileManager readWriteFileManager = new ReadWriteFileManager();
Log.d("DEBUG", "Writing to file...");
readWriteFileManager.writeToFile(cx, contentToWrite.getBytes(),
TEMP_FILE_NAME);
Log.d("DEBUG", "Reading from file..");
String contentRead = readWriteFileManager.readFromFile(cx,
TEMP_FILE_NAME);
Log.d("DEBUG", "Content read: " + contentRead);
Toast.makeText(cx, contentRead, Toast.LENGTH_LONG).show();
}
public String readFromFile(Context context, String sourceFileName) {
/*
* Reading will be file type specific.. Here I'm considering text file
* alone..
*/
FileInputStream fis = null;
InputStreamReader isr = null;
char[] inputBuffer = null;
String file_content = null;
try {
// As this requires full path of the file...
// i.e data/data/package_name/files/your_file_name
File sourceFile = new File(context.getFilesDir().getPath()
+ File.separator + sourceFileName);
if (sourceFile.exists()) {
// Probably you will get an exception if its
// a huge content file..
// I suggest you to handle content here
// itself, instead of
// returning it as return value..
inputBuffer = new char[(int) sourceFile.length()];
fis = context.openFileInput(sourceFileName);
isr = new InputStreamReader(fis);
isr.read(inputBuffer);
file_content = new String(inputBuffer);
try {
isr.close();
fis.close();
} catch (IOException e) {
e.printStackTrace();
}
}
} catch (Exception e) {
e.printStackTrace();
file_content = null;
}
return file_content;
}
public boolean writeToFile(Context context, byte[] contentToWrite,
String destinationFileName) {
FileOutputStream fos = null;
boolean retValue = false;
try {
// Note that your file will be created and stored
// under the path: data/data/your_app_package_name/files/
fos = context.openFileOutput(destinationFileName,
Context.MODE_PRIVATE);
// Note that we are not buffering of contents to write..
// So, this will work best for files with less content....
fos.write(contentToWrite);
// Successfully completed writing..
retValue = true;
try {
fos.flush();
fos.close();
} catch (IOException e) {
e.printStackTrace();
}
} catch (Exception e) {
// You can catch exceptions specifically for low mem,
// file cant be created, and so on..
e.printStackTrace();
// Failed to write..
retValue = false;
}
return retValue;
}
}