android - 写入/读取文件到/从 Android 手机的内存

Question

我有一个名为“MyClass”的实用程序类。该类有两种方法可以将一些数据读/写到手机的内存中。我是 android 新手，请按照以下代码操作。

public class MyClass  {
  public void ConfWrite() {
    try {
      BufferedWriter bufferedWriter = new BufferedWriter(new FileWriter(new 
                           File(getFilesDir()+File.separator+"MyFile.txt")));
      bufferedWriter.write("lalit poptani");
      bufferedWriter.close();
    } catch (Exception e1) {
        e1.printStackTrace();
    }
  }
}

执行ConfWrite方法时失败

请提供更好的方案来解决这个问题

提前致谢

Answer 1

您可以读/写您的文件在data/data/package_name/files文件夹中，

写作

BufferedWriter bufferedWriter = new BufferedWriter(new FileWriter(new 
                            File(getFilesDir()+File.separator+"MyFile.txt")));
bufferedWriter.write("lalit poptani");
bufferedWriter.close();

阅读

 BufferedReader bufferedReader = new BufferedReader(new FileReader(new 
                           File(getFilesDir()+File.separator+"MyFile.txt")));
 String read;
 StringBuilder builder = new StringBuilder("");

 while((read = bufferedReader.readLine()) != null){
        builder.append(read);
      }
 Log.d("Output", builder.toString());
 bufferedReader.close();