package com.threeH.MyExhibition.service;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import android.content.Context;
import android.os.Environment;
public class FileService {
private Context context;
public FileService(Context context) {
this.context = context;
}
public void saveToSDCard(String filename, String content)throws Exception {
File file = new File(Environment.getExternalStorageDirectory(), filename);
FileOutputStream outStream = new FileOutputStream(file);
outStream.write(content.getBytes());
outStream.close();
}
public void saveToSDCard(String filename, byte[] data)throws Exception {
File file = new File(Environment.getExternalStorageDirectory(), filename);
FileOutputStream outStream = new FileOutputStream(file);
outStream.write(data);
outStream.close();
}
/**
* �����ļ�
* @param filename �ļ����
* @param content �ļ�����
*/
public void save(String filename, String content) throws Exception {
//˽�в���ģʽ�������������ļ�ֻ�ܱ���Ӧ�÷��ʣ�����Ӧ�������ʸ��ļ����������˽�в���ģʽ�������ļ���д���ļ��е����ݻḲ��ԭ�ļ�������
FileOutputStream outStream = context.openFileOutput(filename, Context.MODE_PRIVATE);
outStream.write(content.getBytes());
outStream.close();
}
/**
* �����ļ�
* @param filename �ļ����
* @param content �ļ�����
*/
public void saveAppend(String filename, String content) throws Exception {//ctrl+shift+y / x
//˽�в���ģʽ�������������ļ�ֻ�ܱ���Ӧ�÷��ʣ�����Ӧ�������ʸ��ļ����������˽�в���ģʽ�������ļ���д���ļ��е����ݻḲ��ԭ�ļ�������
FileOutputStream outStream = context.openFileOutput(filename, Context.MODE_APPEND);
outStream.write(content.getBytes());
outStream.close();
}
/**
* �����ļ�
* @param filename �ļ����
* @param content �ļ�����
*/
public void saveReadable(String filename, String content) throws Exception {
//˽�в���ģʽ�������������ļ�ֻ�ܱ���Ӧ�÷��ʣ�����Ӧ�������ʸ��ļ����������˽�в���ģʽ�������ļ���д���ļ��е����ݻḲ��ԭ�ļ�������
FileOutputStream outStream = context.openFileOutput(filename, Context.MODE_WORLD_READABLE);
outStream.write(content.getBytes());
outStream.close();
}
/**
* �����ļ�
* @param filename �ļ����
* @param content �ļ�����
*/
public void saveWriteable(String filename, String content) throws Exception {
//˽�в���ģʽ�������������ļ�ֻ�ܱ���Ӧ�÷��ʣ�����Ӧ�������ʸ��ļ����������˽�в���ģʽ�������ļ���д���ļ��е����ݻḲ��ԭ�ļ�������
FileOutputStream outStream = context.openFileOutput(filename, Context.MODE_WORLD_WRITEABLE);
outStream.write(content.getBytes());
outStream.close();
}
/**
* �����ļ�
* @param filename �ļ����
* @param content �ļ�����
*/
public void saveRW(String filename, String content) throws Exception {
//˽�в���ģʽ�������������ļ�ֻ�ܱ���Ӧ�÷��ʣ�����Ӧ�������ʸ��ļ����������˽�в���ģʽ�������ļ���д���ļ��е����ݻḲ��ԭ�ļ�������
FileOutputStream outStream = context.openFileOutput(filename, Context.MODE_WORLD_WRITEABLE + Context.MODE_WORLD_READABLE);
outStream.write(content.getBytes());
outStream.close();
}
/**
* ��ȡ�ļ�����
* @param filename �ļ����
* @return �ļ�����
* @throws Exception
*/
public byte[] read(String filename) throws Exception {
FileInputStream inStream = new FileInputStream(filename);//context.openFileInput(filename);
ByteArrayOutputStream outStream = new ByteArrayOutputStream();
byte[] buffer = new byte[1024];
int len = 0;
while((len = inStream.read(buffer)) != -1){
outStream.write(buffer, 0, len);
}
byte[] data = outStream.toByteArray();
return data;
}
}