Android文件操作（可应用于JAVA）

不知道如何上传文件，只好以代码的形式发布

接口：

package evan.FileSystem.EventsInterface;

public interface IReaderData {
    /*读取数据*/
    void ReaderDatas(char[] buf);
    /*完成读取*/
    void FinishReader();
}

实现：

package evan.FileSystem;

import java.io.BufferedReader;
import java.io.ByteArrayInputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.io.UnsupportedEncodingException;
import evan.FileSystem.EventsInterface.IReaderData;
import android.R.integer;
import android.os.*;

public class FileSystem {

    private static final String systemPath = Environment
            .getExternalStorageDirectory().getAbsolutePath();

    // 获取Android系统的根目录：ROOT
    public static String getSystemPath() {
        return systemPath;
    }

    private String pathString = "";
    private String fileName = "";
    private Boolean isOverWriteFile = false;// 重写File
    private IReaderData ReaderDataEvent;

    /* 获取文件全路径 */
    public String FileFullPath() {
        return pathString + File.separator + fileName;
    }

    /* 路径 */
    public String Path() {
        return pathString;
    }

    /* 文件名称 */
    public String FileName() {
        return fileName;
    }

    /*
     * @Description:指定文件系统进行操作 约定传入路径时，最后一个字符不以"\"或者"/"结束
     */
    public FileSystem(String path, String fileName, Boolean isOverWrite) {
        pathString = path;
        this.fileName = fileName;
        this.isOverWriteFile = isOverWrite;
    }

    /*
     * 默认重写File
     */
    public FileSystem(String path, String fileName) {
        this(path, fileName, true);
    }

    /* 已在构造函数里定义了 */
    public Boolean HasFile() {
        return HasFile(FileFullPath());
    }

    public Boolean HasFile(String fileFullPath) {
        File file = new File(fileFullPath);
        if (file.isFile()) {
            return file.exists();
        }
        return false;
    }

    public File CreatePath() throws IOException {
        return CreatePath(Path());
    }

    /*
     * 创建路径
     */
    public File CreatePath(String path) throws IOException {
        File file = new File(path + File.separator);
        if (file.mkdirs())
            return file;
        return null;
    }

    public File CreaterFile() throws IOException {
        return CreaterFile(FileFullPath());
    }

    /* 创建文件 */
    public File CreaterFile(String fileFullPath) throws IOException {
        File file = new File(fileFullPath);
        if (file.isFile()) {
            if (!HasFile(fileName) || isOverWriteFile)
                file.createNewFile();
        }
        return file;
    }

    public Boolean WriteStreamToFile(InputStream inputStream)
            throws FileNotFoundException, IOException {
        return WriteStreamToFile(FileFullPath(), inputStream);
    }

    /*默认GBK*/
    public InputStream StringToStream(String strMsg) throws UnsupportedEncodingException {
        return StringToStream(strMsg, "GBK");
    }
    
    /* 将字符串转为流 */
    public InputStream StringToStream(String strMsg,String charsetName) throws UnsupportedEncodingException {
        if (strMsg == null || strMsg.length() == 0) {
            return null;
        }
        return new ByteArrayInputStream(strMsg.getBytes(charsetName));
    }

    /* 将数据流写入文件中 */
    public Boolean WriteStreamToFile(String fileFullPath,
            InputStream inputStream) throws FileNotFoundException, IOException {
        OutputStream outputStream = new FileOutputStream(
                CreaterFile(fileFullPath));
        byte[] buffer = new byte[1024 * 2];
        Integer len = 0;
        while ((len = inputStream.read(buffer)) != -1) {
            outputStream.write(buffer, 0, len);
        }
        outputStream.flush();
        outputStream.close();
        return true;
    }

    public InputStream ReadFileToStream() throws FileNotFoundException {
        return ReadFileToStream(FileFullPath());
    }

    /* 读取文档流 */
    public InputStream ReadFileToStream(String fileFullPath)
            throws FileNotFoundException {
        InputStream inputStream = null;
        if (HasFile(fileFullPath)) {
            inputStream = new FileInputStream(fileFullPath);
        }
        return inputStream;
    }

    /* 默认采用GBK读取 */
    public BufferedReader GetBufferedReader(InputStream inputStream)
            throws UnsupportedEncodingException {
        return GetBufferedReader(inputStream, "GBK");
    }

    public BufferedReader GetBufferedReader(InputStream inputStream,
            String encoding) throws UnsupportedEncodingException {
        InputStreamReader inputStreamReader = new InputStreamReader(
                inputStream, encoding);
        BufferedReader bufferedReader = new BufferedReader(inputStreamReader);
        return bufferedReader;
    }

    /* 设置事件 */
    public void setReaderDataEvent(IReaderData ReaderDataEvent) {
        this.ReaderDataEvent = ReaderDataEvent;
    }

    /* 需要实现IReaderData */
    public void ReaderData(BufferedReader bufferedReader) throws IOException {
        ReaderData(bufferedReader, true);
    }

    /* 需要实现IReaderData */
    public void ReaderData(BufferedReader bufferedReader, Boolean isCloseStream)
            throws IOException {
        if (this.ReaderDataEvent == null) {
            return;
        }
        int bufLen=1024 * 4;
        char[] buf = new char[bufLen];
        int len = -1;
        while ((len = bufferedReader.read(buf)) != -1) {
            if (len == bufLen) {
                ReaderDataEvent.ReaderDatas(buf);
            } else {
                char[] lastbuf = new char[len];
                System.arraycopy(buf, 0, lastbuf, 0, len);
                ReaderDataEvent.ReaderDatas(lastbuf);
            }
        }
        this.ReaderDataEvent.FinishReader();
        if (isCloseStream) {
            bufferedReader.close();
        }
    }

}

调用：

FileSystem fileSystem = new FileSystem(FileSystem.getSystemPath(),
                "test.txt");
        fileSystem.setReaderDataEvent(new ReaderData());
        try {
            fileSystem
                    .WriteStreamToFile(fileSystem.StringToStream("我是EvanLee"));

            fileSystem.ReaderData(fileSystem.GetBufferedReader(fileSystem
                    .ReadFileToStream()));
        } catch (Exception e) {
            e.printStackTrace();
        }

    public class ReaderData implements IReaderData {

        @Override
        public void ReaderDatas(char[] buf) {
            charList.add(buf);
            // 读取的数据
            Log.d("msg", String.valueOf(buf));
            System.out.println(buf);
        }

        @Override
        public void FinishReader() {
            //TODO
        }
    }