写文件相关

向sd卡根目录中写入文件

//首先判断是否存在sd卡
if(Environment.getExternalStorageState().equals(
                Environment.MEDIA_MOUNTED)){

    //获取外部设备
    File file=new File(Environment.getExternalStorageDirectory(),"qianqian.txt");
    FileOutputStream outStream=new FileOutputStream(file);
     //写入文件
    outStream.write(content.getBytes());
    outStream.close();  
    
}

读取assets下的文件路径

//格式如下
file:///android_asset/myVideo.html
file:///android_asset/xx(文件名称)

读取assets下的文件转化为String

public String getFromAssets(String fileName) {
        try {
            InputStreamReader inputReader = new InputStreamReader(
                    getResources().getAssets().open(fileName));
            BufferedReader bufReader = new BufferedReader(inputReader);
            String line = "";
            String Result = "";
            while ((line = bufReader.readLine()) != null)
                Result += line;
            return Result;
        } catch (Exception e) {
            e.printStackTrace();
        }
        return "";
    }