[移动开发]android创建文件写入数据和读取文件数据

1.创建文件写入数据方法

  public void writeSDFile(String fileName, String write_str) throws IOException{
        File file = new File(fileName);
        FileOutputStream fos = new FileOutputStream(file);
        byte [] bytes = write_str.getBytes();
        fos.write(bytes);
        fos.close();
    }

1.1在需要的地方使用

writeSDFile(""文件路径和名字.txt"","需要写入的数据");

2.读取指定文件内容

直接复制工具类即可

import java.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;
import java.io.InputStreamReader;
 
/**
 * Created by cruze on 2015/7/29.
 */
public class TxtTool {
 
    public static String readTxt(String path){
        String str = "";
        try {
            File urlFile = new File(path);
            InputStreamReader isr = new InputStreamReader(new FileInputStream(urlFile), "UTF-8");
            BufferedReader br = new BufferedReader(isr);
 
            String mimeTypeLine = null ;
            while ((mimeTypeLine = br.readLine()) != null) {
                str = str+mimeTypeLine;
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
        return  str;
    }
 
}

2.1在需要的地方调用

 String image_versions = TxtTool.readTxt("路径和名字.txt");