package cn.centaur.com.edb_rf.util;
import android.content.Context;
import android.os.Environment;
import java.io.DataOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.FileWriter;
import java.io.IOException;
/**
* @author zz
* @describe 将信息写到到txt并保存到sd卡
**/
public class FileUtils {
private Context context;
/**
* SD卡是否存在
**/
private boolean hasSD = false;
/**
* SD卡的路径
**/
private String SDPATH;
/**
* 当前程序包的路径
**/
private String FILESPATH;
public FileUtils(Context context) {
this.context = context;
hasSD = Environment.getExternalStorageState().equals(
android.os.Environment.MEDIA_MOUNTED);
SDPATH = Environment.getExternalStorageDirectory().getPath();
FILESPATH = this.context.getFilesDir().getPath();
}
/**
* 在SD卡上创建文件
*
* @throws IOException
*/
public File createSDFile(String fileName) throws IOException {
File file = new File(SDPATH + "//" + fileName);
if (!file.exists()) {
file.createNewFile();
}
return file;
}
/**
* 删除SD卡上的文件
*
* @param fileName
*/
public boolean deleteSDFile(String fileName) {
File file = new File(SDPATH + "//" + fileName);
if (file == null || !file.exists() || file.isDirectory())
return false;
return file.delete();
}
/**
* 写入内容到SD卡中的txt文本中
* str为内容
*/
public void writeSDFile(String str, String fileName) {
try {
FileWriter fw = new FileWriter(SDPATH + "//" + fileName);
File f = new File(SDPATH + "//" + fileName);
fw.write(str);
FileOutputStream os = new FileOutputStream(f);
DataOutputStream out = new DataOutputStream(os);
out.writeShort(2);
out.writeUTF("");
System.out.println(out);
fw.flush();
fw.close();
System.out.println(fw);
} catch (Exception e) {
}
}
/**
* 读取SD卡中文本文件
*
* @param fileName
* @return
*/
public String readSDFile(String fileName) {
StringBuffer sb = new StringBuffer();
File file = new File(SDPATH + "//" + fileName);
try {
FileInputStream fis = new FileInputStream(file);
int c;
while ((c = fis.read()) != -1) {
sb.append((char) c);
}
fis.close();
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
return sb.toString();
}
//包路径
public String getFILESPATH() {
return FILESPATH;
}
//SD卡路径
public String getSDPATH() {
return SDPATH;
}
//SD卡是否存在
public boolean hasSD() {
return hasSD;
}
//文件是否存在
public boolean fileExists(String fileName) {
StringBuffer sb = new StringBuffer();
File file = new File(SDPATH + "//" + fileName);
if (file.exists()) {
return true;
} else {
return false;
}
}
}
