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PORemove a specific line from a .txt file
 

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    <p>I'm trying to remove a specific line from .txt file, that is stored on my android phone. This is how I'm trying to do it:</p> <pre><code>public void removeLineFrom (String filePath, String lineToRemove){ try { File oldFile = new File(filePath); File tempFile = new File(externalStoragePath + File.separator + "/Android/data/com.whizzappseasyvoicenotepad/temp file.txt"); BufferedReader br = new BufferedReader(new FileReader(filePath)); PrintWriter pw = new PrintWriter(new FileWriter(tempFile)); String line = null; //Read from the original file and write to the new //unless content matches data to be removed. while ((line = br.readLine()) != null) { if (!line.equals(lineToRemove)) { pw.write(line); pw.flush(); } } pw.close(); br.close(); //Delete the original file oldFile.delete(); //Rename the new file to the filename the original file had. tempFile.renameTo(recordedFiles); } catch (FileNotFoundException ex) { ex.printStackTrace(); } catch (IOException ex) { ex.printStackTrace(); } } </code></pre> <p>Everytime I call this method like this:</p> <pre><code>removeLineFrom(externalStoragePath + File.separator + "/Android/data/com.whizzappseasyvoicenotepad/recorded files.txt", recordedFilesArray.get(toDelete)); </code></pre> <p>The app crashes. This is the logcat error:</p> <pre><code>08-08 15:24:22.225: E/AndroidRuntime(6146): java.lang.IndexOutOfBoundsException: Invalid index 1, size is 1 </code></pre> <p>It says the problem is in the line posted above (calling the method). I don't know why the index would be invalid. This is toDelete variable:</p> <pre><code>toDelete = arg2; </code></pre> <p><strong>Whole onItemLongClick if anyone needs:</strong></p> <pre><code>listView.setOnItemLongClickListener(new OnItemLongClickListener(){ @Override public boolean onItemLongClick(AdapterView&lt;?&gt; arg0, View arg1, int arg2, long arg3) { deleteAlert.setTitle("Warning"); deleteAlert.setMessage("Are you sure you want to delete this?"); toDelete = arg2; deleteAlert.setPositiveButton("Yes", new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { File directory = new File (externalStoragePath + File.separator + "Android/data/com.whizzappseasyvoicenotepad/"); File deleteFile = new File (directory, recordedFilesArray.get(toDelete) + ".mp3"); deleteFile.delete(); Log.i("TAG", "Deleting file: " + directory + recordedFilesArray.get(toDelete) + ".mp3"); listAdapter.remove(listAdapter.getItem(toDelete)); listAdapter.notifyDataSetChanged(); removeLineFrom(externalStoragePath + File.separator + "/Android/data/com.whizzappseasyvoicenotepad/recorded files.txt", recordedFilesArray.get(toDelete)); Toast toast = Toast.makeText(getApplicationContext(), "Deleted", Toast.LENGTH_SHORT); toast.show(); dialog.dismiss(); } }); deleteAlert.setNegativeButton("No", null); deleteAlert.show(); return false; } }); </code></pre>
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    1. COcheck out this answer http://stackoverflow.com/a/1381041/794088
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