SerializeObject.WriteSettings在哪里写文件？ （路径）

Question

我无法在手机上找到该文件。我想有一个桌面应用程序，可以读取我用手机保存的文件（加速度计数据），因为我对Android开发很新，我认为最简单的方法就是在文件系统中找到它然后打开它在我的桌面上通过：

 SerializeObject.ReadSettings(this, "activityLibrary.dat");

我通过以下方式将文件保存在我的应用中：

 SerializeObject.WriteSettings(this, ser, "activityLibrary.dat");

我尝试使用ES Explorer应用程序搜索文件系统，但它找不到我的文件。尝试使用Windows搜索。有人可以帮忙吗？或者建议一种在手机和桌面之间移动此文件的另一种简单易懂的方法吗？

编辑：

我正在使用此类进行对象序列化：

import java.io.BufferedReader;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.io.OutputStreamWriter;
import java.io.Serializable;

import android.content.Context;
import android.util.Base64InputStream;
import android.util.Base64OutputStream;
import android.util.Log;

/**
 * Take an object and serialize and then save it to preferences
 * @author John Matthews
 *
 */
public class SerializeObject {
private final static String TAG = "SerializeObject";

/**
 * Create a String from the Object using Base64 encoding
 * @param object - any Object that is Serializable
 * @return - Base64 encoded string.
 */
public static String objectToString(Serializable object) {
    ByteArrayOutputStream out = new ByteArrayOutputStream();
    try {
        new ObjectOutputStream(out).writeObject(object);
        byte[] data = out.toByteArray();
        out.close();

        out = new ByteArrayOutputStream();
        Base64OutputStream b64 = new Base64OutputStream(out,0);
        b64.write(data);
        b64.close();
        out.close();

        return new String(out.toByteArray());
    } catch (IOException e) {
        e.printStackTrace();
    }
    return null;
}

/**
 * Creates a generic object that needs to be cast to its proper object
 * from a Base64 ecoded string.
 * 
 * @param encodedObject
 * @return
 */
public static Object stringToObject(String encodedObject) {
    try {
        return new ObjectInputStream(new Base64InputStream(
                new ByteArrayInputStream(encodedObject.getBytes()), 0)).readObject();
    } catch (Exception e) {
        e.printStackTrace();
    }
    return null;
}

/**
 * Save serialized settings to a file
 * @param context
 * @param data
 */
public static void WriteSettings(Context context, String data, String filename){ 
    FileOutputStream fOut = null; 
    OutputStreamWriter osw = null;

    try{
        fOut = context.openFileOutput(filename, Context.MODE_PRIVATE);       
        osw = new OutputStreamWriter(fOut); 
        osw.write(data); 
        osw.flush(); 
        //Toast.makeText(context, "Settings saved",Toast.LENGTH_SHORT).show();
    } catch (Exception e) {       
        e.printStackTrace(); 
       // Toast.makeText(context, "Settings not saved",Toast.LENGTH_SHORT).show();
    } 
    finally { 
        try { 
            if(osw!=null)
                osw.close();
            if (fOut != null)
                fOut.close(); 
        } catch (IOException e) { 
               e.printStackTrace(); 
        } 
    } 
}

/**
 * Read data from file and put it into a string
 * @param context
 * @param filename - fully qualified string name
 * @return
 */
public static String ReadSettings(Context context, String filename){ 
    StringBuffer dataBuffer = new StringBuffer();
    try{
        // open the file for reading
        InputStream instream = context.openFileInput(filename);
        // if file the available for reading
        if (instream != null) {
            // prepare the file for reading
            InputStreamReader inputreader = new InputStreamReader(instream);
            BufferedReader buffreader = new BufferedReader(inputreader);

            String newLine;
            // read every line of the file into the line-variable, on line at the time
            while (( newLine = buffreader.readLine()) != null) {
                // do something with the settings from the file
                dataBuffer.append(newLine);
            }
            // close the file again
            instream.close();
        }

    } catch (java.io.FileNotFoundException f) {
        // do something if the myfilename.txt does not exits
        Log.e(TAG, "FileNot Found in ReadSettings filename = " + filename);
        try {
            context.openFileOutput(filename, Context.MODE_PRIVATE);
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        }
    } catch (IOException e) {
        Log.e(TAG, "IO Error in ReadSettings filename = " + filename);
    }

    return dataBuffer.toString();
}

}

Answer 1

openFileOutput将文件保存在/data/data/your.package.name/files/目录中。

使用Context.getExternalFilesDir或Environment.getExternalStorageDirectory轻松访问要复制到计算机或自行邮寄的文件。