向文件中添加数据

private void writeLine(){
    File file = new File("/storage/self/primary/360Log/replugin/aaaa_test.txt");
    FileOutputStream fos = null;
    try {
        //不存在,创建 存在 在末尾追加
        if (!file.exists()) {
            file.createNewFile();
            fos = new FileOutputStream(file);
        } else {
            fos = new FileOutputStream(file, true);
        }
        OutputStreamWriter osw = new OutputStreamWriter(fos, "UTF-8");
        osw.write("no change line");
        osw.write("\r\n");
        osw.write("change line");
        osw.close();
    } catch (Exception e) {
            e.printStackTrace();
        }


}