Reading files in android. how to fix bad path

Question

I am trying to read a file in android. I am used to doing this in java but here I am getting a open failed enoent (no such file or directory) error. I am not sure how to import the file. Should I put it in the same directory as my application? right now its on my desktop. here is my code

package com.androidplot.fun;
import java.io.BufferedReader;
import java.io.FileReader;
import java.io.IOException;

public class ReadFile {
    private String path;
    public ReadFile(String file_path){
        path = file_path;
    }
    public String[] OpenFile() throws IOException{
        FileReader fr = new FileReader(path);
        BufferedReader textReader = new BufferedReader(fr);
        int numberOfLines = 3;
        String[ ] textData = new String[numberOfLines];
        int i;
        for (i=0; i < numberOfLines; i++) {
            textData[ i ] = textReader.readLine();
        }
        textReader.close( );
        return textData;
    }
    int readLines() throws IOException{
        FileReader file_to_read = new FileReader(path);
        BufferedReader bf = new BufferedReader(file_to_read);

        String aLine;
        int numberOfLines = 0;
        while (( aLine = bf.readLine()) != null){
            numberOfLines++;
        }
        bf.close();
        return numberOfLines;
    }

}

This is the class I've been using. And this is what I am using in my main program

try{
    ReadFile file = new ReadFile("/Users/jonathon/Desktop/data.txt");
    String[] aryLines = file.OpenFile();
    int x;
    for ( x=0; x < aryLines.length; i++ ) {
      System.out.println( aryLines[ i ] ) ;
    }
 }
 catch ( IOException e ) {
   System.out.println( e.getMessage() );
 }

score 1 · Accepted Answer · answered Nov 09 '12 at 16:08

1

Is this file going to be bundled with your application? If so, you should include it as a resource. Here's a link with some general information on how to accomplish that.

Edit: I just took a look at your file path. The code running on an android emulator is not going to have access to your Windows desktop. Start the emulator, transfer the data to it, and then have the application attempt to read it from the "phone."

answered Nov 09 '12 at 16:08

Billdr

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no Its just some test data that I want to run and look at the results in my emulator – Jonathan Nov 09 '12 at 16:09
Sorry, I didn't see your file path initially. Answer has been updated. – Billdr Nov 09 '12 at 16:11
I was about to mention that :p You need to move the file onto your Emulated SDCard for your device. – IAmGroot Nov 09 '12 at 16:11
how do I add the file in my emulator? I am sorry I am new to android – Jonathan Nov 09 '12 at 16:12
Here's some information on doing that: http://stackoverflow.com/questions/2808632/manually-put-files-to-android-emulator-sd-card – Billdr Nov 09 '12 at 16:13
Thanks @Billdr. But its saying that the file system is read only. import into phone and export from phone options are disabled – Jonathan Nov 09 '12 at 16:26
Thank you so much. Hardware tag was the problem. :) – Jonathan Nov 09 '12 at 16:46
Happy to help! Good luck with your app. – Billdr Nov 09 '12 at 16:58

score 0 · Answer 2 · edited May 16 '15 at 23:20

That path won't be valid. If you want to store it on the SD card, start with: Environment.getExternalStorageDirectory().getAbsolutePath();

That should return the root of the SD card, and you can put files directly in there or create your own structure under it. (Also, personally, I don't bother with the emulator unless I want to test on something my phone can't do, like a different version of Android. I plug the phone in and test strictly on that. From how clunky the emulator is, I suspect the Google developers do this too...)

Reading files in android. how to fix bad path

2 Answers2