data not saving in file properly

[nick2361]

Hello Hope you're having a nice day. As for the question, I'm trying to make an android counter app, which will save count state in file and read it on app open, but every time I start the app, it shows 0. Any help is welcome

    package com.UntitledStudios.Counter;

    import android.content.Context;
    import android.support.v7.app.AppCompatActivity;
    import android.os.Bundle;
    import android.widget.Button;
    import android.view.View;
    import android.widget.TextView;

    import java.io.File;
    import java.io.FileInputStream;
    import java.io.FileNotFoundException;
    import java.io.FileOutputStream;
    import java.io.IOException;
    import java.util.Scanner;

    public class MainActivity extends AppCompatActivity{

       int count;

       Button XuinaButton;
       [USER=1021285]@override[/USER]
       protected void onCreate(Bundle savedInstanceState) {
           super.onCreate(savedInstanceState);
           setContentView(R.layout.activity_main);

           File file = new File("COUNTER");
           if(file.exists()) {
               try {
                   FileInputStream in = openFileInput("COUNTER");
                   Scanner scanner = new Scanner(in);
                   scanner.nextInt(count);
               } catch (FileNotFoundException e) {
                   e.printStackTrace();
               }
           }
           else{
               count =0;
           }

           CounterButton = (Button) findViewById(R.id.Counter);

           CounterButton.setOnClickListener(new View.OnClickListener() {
               [USER=1021285]@override[/USER]
               public void onClick(View v) {
                   count++;
                   TextView CounterText = ((TextView) findViewById(R.id.CurrentCount));
                   CounterText.setText("" + count);
               }

           });


           FileOutputStream outputStream;

           try {
               String Counted = Integer.toString(count);
               outputStream = openFileOutput("COUNTER.txt", Context.MODE_PRIVATE);
               outputStream.write(Counted.getBytes());
               outputStream.close();
           } catch (Exception e) {
               e.printStackTrace();
           }
       }

    }

I have root access on my asus, so I can check /data/data/com.UntitledStudios.Counter/files/Counter.txt and see the value written inside.

 

[Deleted User]

Good evening. Your code probably catches an exception but you're not seeing it. This is a very bad idea

  e.printStackTrace();

Because if an exception is caught, then printStackTrace() will send the output to standard out, and for an app, who knows where that is. You probably won't see it in your Logcat view.

Instead write this

  throw e;

The exception will be caught by the system and your app will terminate. But you'll see the whole stack trace in your Logcat view. This should tell you exactly what went wrong.

Or you could use

  Log.d("myApp", e.getMessage());