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POChecking if a File is Blank in Android
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Id
17883124
data
AcceptedAnswerId
17883205
AnswerCount
3
ClosedDate
CommentCount
2
CommunityOwnedDate
CreationDate
2013-07-26T13:50:21.843
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0
LastActivityDate
2017-07-20T05:35:54.893
LastEditDate
2013-10-16T03:13:44.687
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2554605
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2554605
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0
PostTypeId
1
Score
3
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6461
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text
Body
<p>This is my code sample. The code is pretty long just to test if a file is blank and then if it isn't, write onto it. Either way, the line <code>if (!(data.equals("")) && !(data.equals(null)))</code> doesn't work and even when the file is blank, it still goes through the Alert.</p> <pre><code>FileInputStream fIn = null;String data = null;InputStreamReader isr = null; try{ char[] inputBuffer = new char[1024]; fIn = openFileInput("test.txt"); isr = new InputStreamReader(fIn); isr.read(inputBuffer); data = new String(inputBuffer); isr.close(); fIn.close(); }catch(IOException e){} // this is the check for if the data inputted from the file is NOT blank if (!(data.equals("")) && !(data.equals(null))) { AlertDialog.Builder builder = new AlertDialog.Builder(Main.this); builder.setMessage("Clear your file?" + '\n' + "This cannot be undone.") .setCancelable(false) .setPositiveButton("Yes", new DialogInterface.OnClickListener() { public void onClick(DialogInterface dialog, int id) { EditText we = (EditText)findViewById(R.id.txtWrite); FileOutputStream fOut = null; OutputStreamWriter osw = null; try{ fOut = openFileOutput("test.txt", Context.MODE_PRIVATE); osw = new OutputStreamWriter(fOut); osw.write(""); osw.close(); fOut.close(); we.setText(""); }catch(Exception e){} } }) .setNegativeButton("No", new DialogInterface.OnClickListener() { public void onClick(DialogInterface dialog, int id) { dialog.cancel(); } }); AlertDialog alert = builder.create(); alert.show(); } </code></pre> <p>Also, if anyone has a way of shorting up this code, I would be greatful!</p>
Tags
<java><android><file>
Title
Checking if a File is Blank in Android
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1. PO
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  PTAnswer
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1. This table or related slice is empty.
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1. PTQuestion
UserLastEditorUserId
1. USMichael Yaworski
UserOwnerUserId
1. USMichael Yaworski
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1. PO
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  POChecking if a File is Blank in Android
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1. COhttp://stackoverflow.com/questions/7190618/most-efficient-way-to-check-if-a-file-is-empty-in-java-on-windows Have a look at this post
  singulars
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  POChecking if a File is Blank in Android
  UserUserId
  USFlo
2. CO@Flo Thanks for the link. It's good and should work, but it doesn't :(
  singulars
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  POChecking if a File is Blank in Android
  UserUserId
  USMichael Yaworski

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