内部保存文件未按预期工作

Question

我已经编写了简单的代码来在内部将数据保存到文本文件中。但是，运行代码后，我不知道在哪里可以找到所需的文件。此外，我在日志中发现一条错误消息为

"SPAN_EXCLUSIVE_EXCLUSIVE"

package com.example.saving_files;

import java.io.BufferedWriter;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.io.OutputStreamWriter;
import android.os.Bundle;
import android.app.Activity;
import android.util.Log;
import android.view.Menu;

public class MainActivity extends Activity {

     File file;
     FileOutputStream fos;
     String FlieName = "output.text";

        @Override
        protected void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.activity_main);
            file = new File(FlieName);
            try {
                fos = openFileOutput(FlieName, MODE_PRIVATE);
                fos.write(122);
            } catch (FileNotFoundException e) {
                Log.d("output", file.getAbsolutePath());
                e.printStackTrace();
            } catch (IOException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
            file = getFilesDir();
            Log.d("output_path", file.getAbsolutePath());
        }
    }

Answer 1

File sdCard = Environment.getExternalStorageDirectory();
File file = new File(sdCard, "filename");

FileOutputStream f = new FileOutputStream(file);

此代码将在 SD 的根目录中创建新文件。不要忘记添加 <uses-permission> 在清单中写入 SD

Answer 2

检查此代码和 cmets；

File sdcard = Environment.getExternalStorageDirectory();
File f = new File(sdcard, "/yourfile");

if (!f.exsist()) {
    f.createNewFile();
    // Use outwriter here, (outputstream) search how to write into a text file in java code 
}