Android简单的TXT文件存储

　　文件写入

//文件写入的位置为./data/data/包名/files/文件名
public void fileW(String message) {  
        try {
            FileOutputStream fout = MainActivity.this.openFileOutput(“a.txt”, MODE_PRIVATE);  
            byte[] bytes = message.getBytes();  
            fout.write(bytes);  
            fout.close();  
        } catch (Exception e) {  
            e.printStackTrace();  
        }  
    }  

　　文件读取

    
    public String fileR(){
        String res = "";
        try {
            FileInputStream fin = new FileInputStream("./data/data/com.example.filewr/files/a.txt");
            int length = fin.available();
            byte[] buffer = new byte[length];
            fin.read(buffer);
            res = EncodingUtils.getString(buffer, "UTF-8");
            fin.close();//关闭资源
        } catch (Exception e) {
            e.printStackTrace();
        }
        return res;
    }