How can I read a text file in Android?

Question

I want to read the text from a text file. In the code below, an exception occurs (that means it goes to the catch block). I put the text file in the application folder. Where should I put this text file (mani.txt) in order to read it correctly?

    try
    {
        InputStream instream = openFileInput("E:\\test\\src\\com\\test\\mani.txt"); 
        if (instream != null)
        {
            InputStreamReader inputreader = new InputStreamReader(instream); 
            BufferedReader buffreader = new BufferedReader(inputreader); 
            String line,line1 = "";
            try
            {
                while ((line = buffreader.readLine()) != null)
                    line1+=line;
            }catch (Exception e) 
            {
                e.printStackTrace();
            }
         }
    }
    catch (Exception e) 
    {
        String error="";
        error=e.getMessage();
    }

what do you hope your emulator is a part of your s/m? "E:\\test\\src\\com\\test\\mani.txt" — Athul Harikumar, Sep 14 '12 at 09:39
InputStream iS = resources.getAssets().open(fileName); ( if you put the file in assets) — Athul Harikumar, Sep 14 '12 at 09:42
@Sandip actually i copied text file (mani.txt) and put it into the folder of android application(folder having .settings , bin,libs,src,assets,gen,res,androidmanifeast.xml) — user1635224, Sep 14 '12 at 09:50
@user1635224 : put this file in asset folder. and refer following code... If you face any problem then ask directly — Sandip Armal Patil, Sep 14 '12 at 09:53
or put in simply res/raw folder and check my updated answer. — Sandip Armal Patil, Sep 14 '12 at 09:55
@Sandip : thank u very much, i put in asset folder and i got result — user1635224, Sep 14 '12 at 09:58

Sandip Armal Patil · Answer 1 · 2015-01-22T10:55:14.043

If you want to read file from sd card. Then following code might be helpful for you.

 StringBuilder text = new StringBuilder();
    try {
    File sdcard = Environment.getExternalStorageDirectory();
    File file = new File(sdcard,"testFile.txt");

        BufferedReader br = new BufferedReader(new FileReader(file));  
        String line;   
        while ((line = br.readLine()) != null) {
                    text.append(line);
                    Log.i("Test", "text : "+text+" : end");
                    text.append('\n');
                    } }
    catch (IOException e) {
        e.printStackTrace();                    

    }
    finally{
            br.close();
    }       
    TextView tv = (TextView)findViewById(R.id.amount);  

    tv.setText(text.toString()); ////Set the text to text view.
  }

    }

If you wan to read file from asset folder then

AssetManager am = context.getAssets();
InputStream is = am.open("test.txt");

Or If you wan to read this file from res/raw foldery, where the file will be indexed and is accessible by an id in the R file:

InputStream is = getResources().openRawResource(R.raw.test);

Good example of reading text file from res/raw folder

`br` is out of scope in the finally block. – AlgoRythm Jun 18 '18 at 21:52 — AlgoRythm, Jun 18 '18 at 21:52

score 6 · Answer 2 · edited Nov 29 '16 at 16:50

Try this code

public static String pathRoot = "/sdcard/system/temp/";
public static String readFromFile(Context contect, String nameFile) {
    String aBuffer = "";
    try {
        File myFile = new File(pathRoot + nameFile);
        FileInputStream fIn = new FileInputStream(myFile);
        BufferedReader myReader = new BufferedReader(new InputStreamReader(fIn));
        String aDataRow = "";
        while ((aDataRow = myReader.readLine()) != null) {
            aBuffer += aDataRow;
        }
        myReader.close();
    } catch (FileNotFoundException e) {
        e.printStackTrace();
    } catch (IOException e) {
        e.printStackTrace();
    }
    return aBuffer;
}

score 3 · Answer 3 · answered Sep 12 '20 at 17:07

3

Shortest form for small text files (in Kotlin):

val reader = FileReader(path)
val txt = reader.readText()
reader.close()

answered Sep 12 '20 at 17:07

Eneko

1,709
1
16
25

score 1 · Answer 4 · answered Feb 27 '14 at 07:48

Try this

try {
        reader = new BufferedReader(new InputStreamReader(in,"UTF-8"));
    } catch (UnsupportedEncodingException e1) {
        // TODO Auto-generated catch block
        e1.printStackTrace();
    }
      String line="";
      String s ="";
   try 
   {
       line = reader.readLine();
   } 
   catch (IOException e) 
   {
       e.printStackTrace();
   }
      while (line != null) 
      {
       s = s + line;
       s =s+"\n";
       try 
       {
           line = reader.readLine();
       } 
       catch (IOException e) 
       {
           e.printStackTrace();
       }
    }
    tv.setText(""+s);
  }

score 0 · Answer 5 · edited Jun 25 '23 at 20:19

 if (Environment.isExternalStorageManager()) {
    //todo when permission is granted
 } else {
    //request for the permission
    Intent intent = new Intent(Settings.ACTION_MANAGE_APP_ALL_FILES_ACCESS_PERMISSION);
    Uri uri = Uri.fromParts("package", getPackageName(), null);
    intent.setData(uri);
    startActivity(intent);
 }

// Add in Maifest

<uses-permission android:name="android.permission.MANAGE_EXTERNAL_STORAGE" />

How can I read a text file in Android?

5 Answers5

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