大话企业级android读书笔记（三）

/**
 * 【文件操作】
 */
package Iwit.IwitTest;

import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;

import android.content.Context;
import android.widget.Toast;

/**
 * @author Shine
 *【文件读，写】
 */
public class FileOperate
{  
 /**
  * 【读取文件】
  * @param context
  * @param fileName
  * @return
  */
 public String ReadText(Context context,String fileName)
 {
       FileInputStream fIn = null;
       InputStreamReader isr = null;      
       char[] inputBuffer = new char[255];
       String data = null;      
       try
       {
        fIn =context.openFileInput(fileName);     
           isr = new InputStreamReader(fIn);
           isr.read(inputBuffer);
           data = new String(inputBuffer);
           Toast.makeText(context, "read Succeed",Toast.LENGTH_SHORT).show();
       }
      catch (Exception e)
          {     
       e.printStackTrace();
       Toast.makeText(context, " not read",Toast.LENGTH_SHORT).show();
          }
       finally
       {
              try {
                     isr.close();
                     fIn.close();
                   }
              catch (IOException e)
              {
                    e.printStackTrace();
              }
           }
       return data;
   }
 
 /**
  * 【写入文件】
  * @param context
  * @param fileName
  * @param data
  */
 public void WriteText(Context context, String fileName,String data)
 {
       FileOutputStream fOut = null;
       OutputStreamWriter osw = null;
      
       try{
        fOut =context.openFileOutput(fileName, 1);
           osw = new OutputStreamWriter(fOut);
           osw.write(data);
           osw.flush();
           Toast.makeText(context, " saved",Toast.LENGTH_SHORT).show();
           }
           catch (Exception e)
           {     
           e.printStackTrace();
           Toast.makeText(context, " not saved",Toast.LENGTH_SHORT).show();
           }
           finally
           {
              try {
                     osw.close();
                     fOut.close();
                   }
              catch (IOException e)
               {
                    e.printStackTrace();
                 }
           }
  }
}