创建文件并进行读写

package cn.jinbi.app.fileStream;import java.io.ByteArrayOutputStream;import java.io.FileInputStream;import java.io.FileOutputStream;import java.io.IOException;import android.content.Context;public class FileService {private Context context;public FileService(Context context) {super();this.context = context;}public void save(String filename, String content) throws IOException { FileOutputStream outStream = context.openFileOutput(filename, Context.MODE_PRIVATE); outStream.write(content.getBytes()); outStream.close();}public String read(String filename) throws IOException {byte[] buffer = new byte[1024];ByteArrayOutputStream outStream = new ByteArrayOutputStream();FileInputStream input = context.openFileInput(filename);int len = 0;while ((len = input.read(buffer)) != -1){outStream.write(buffer, 0, len);}byte[] data = outStream.toByteArray();return new String(data);}}