当前位置:操作系统 > 安卓/Android >>

Android TXT文件读写

package com.wirelessqa.helper; 
 
import java.io.FileInputStream; 
import java.io.FileOutputStream; 
import java.io.InputStream; 
 
import org.apache.http.util.EncodingUtils; 
 
import android.app.Activity; 
 
public class FileAccess extends Activity { 
 
    /**
     * 一、私有文件夹下的文件存取(/data/data/包名/files)
     * 
     * @param fileName
     * @param message
     */ 
    public void writeFileData(String fileName, String message) { 
        try { 
            FileOutputStream fout = openFileOutput(fileName, MODE_PRIVATE); 
            byte[] bytes = message.getBytes(); 
            fout.write(bytes); 
            fout.close(); 
        } catch (Exception e) { 
            e.printStackTrace(); 
        } 
    } 
 
    /**
     * //读文件在./data/data/包名/files/下面
     * 
     * @param fileName
     * @return
     */ 
    public String readFileData(String fileName) { 
        String res = ""; 
        try { 
            FileInputStream fin = openFileInput(fileName); 
            int length = fin.available(); 
            byte[] buffer = new byte[length]; 
            fin.read(buffer); 
            res = EncodingUtils.getString(buffer, "UTF-8"); 
            fin.close(); 
        } catch (Exception e) { 
            e.printStackTrace(); 
        } 
        return res; 
    } 
 
    /**
     * 写, 读sdcard目录上的文件,要用FileOutputStream, 不能用openFileOutput
     * 不同点:openFileOutput是在raw里编译过的,FileOutputStream是任何文件都可以
     * @param fileName
     * @param message
     */ 
    // 写在/mnt/sdcard/目录下面的文件 
    public void writeFileSdcard(String fileName, String message) { 
 
        try { 
 
            // FileOutputStream fout = openFileOutput(fileName, MODE_PRIVATE); 
 
            FileOutputStream fout = new FileOutputStream(fileName); 
 
            byte[] bytes = message.getBytes(); 
 
            fout.write(bytes); 
 
            fout.close(); 
 
        } 
 
        catch (Exception e) { 
 
            e.printStackTrace(); 
 
        } 
 
    } 
 
    // 读在/mnt/sdcard/目录下面的文件 
 
    public String readFileSdcard(String fileName) { 
 
        String res = ""; 
 
        try { 
 
            FileInputStream fin = new FileInputStream(fileName); 
 
            int length = fin.available(); 
 
            byte[] buffer = new byte[length]; 
 
            fin.read(buffer); 
 
            res = EncodingUtils.getString(buffer, "UTF-8"); 
 
            fin.close(); 
 
        } 
 
        catch (Exception e) { 
 
            e.printStackTrace(); 
 
        } 
 
        return res; 
 
    } 
 
 
    /**
     * 二、从resource中的raw文件夹中获取文件并读取数据(资源文件只能读不能写)
     * 
     * @param fileInRaw
     * @return
     */ 
    public String readFromRaw(int fileInRaw) { 
        String res = ""; 
        try { 
            InputStream in = getResources().openRawResource(fileInRaw); 
            int length = in.available(); 
            byte[] buffer = new byte[length]; 
            in.read(buffer); 
            res = EncodingUtils.getString(buffer, "GBK"); 
            // res = new String(buffer,"GBK"); 
            in.close(); 
        } catch (Exception e) { 
            e.printStackTrace(); 
        } 
        return res; 
    } 
 
 
补充:移动开发 , Android ,
CopyRight © 2022 站长资源库 编程知识问答 zzzyk.com All Rights Reserved
部分文章来自网络,