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copied!<p>I suppose that in the line of where you actually save the "progress" into the SharedPreferences, <strong>you will accidentially be saving a String instead of an Integer</strong>. </p> <p>Then, upon trying to get the saved value you run into a ClassCastException because the saved value is actually a String and not an Integer.</p> <p><strong>UPDATE:</strong></p> <p>Try getting the SharedPreferences like this:</p> <pre><code>SharedPreferences sp = c.getSharedPreferences("MySharedPrefs", 0); </code></pre> <p>Also consider <strong>cleaning your project</strong>.</p> <p>I also cant understand <strong>why you restart your Activity</strong> everytime you call weightLoss(), could you explain?</p> <pre><code>Intent refresh = new Intent(this, Progress.class); startActivity(refresh); this.finish(); </code></pre> <p><strong>This is how you should refresh your UI-Components:</strong></p> <p>Simply create a refresh method that reads the values out of the SharedPreferences anytime you want and sets them to the TextViews.</p> <pre><code>protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_progress); names = (TextView) findViewById(R.id.noProf); start = (TextView) findViewById(R.id.start); current = (TextView) findViewById(R.id.currently); goal = (TextView) findViewById(R.id.goal); progress = (ProgressBar) findViewById(R.id.progressBar1); refresh(); // call this method everytime you want to update the textviews and so on... } // CALL THIS METHOD EVERYTIME YOU WANT TO REFRESH INSTEAD OF RESTARTING YOUR ACTIVITY public void refresh() { SharedPreferences preferences = PreferenceManager.getDefaultSharedPreferences(this); String name = preferences.getString("name", "You need to create a profile first!"); names.setText("Welcome back " + name); startS = preferences.getString("start", ""); start.setText("Start:" + startS); currentWeight = preferences.getString("current", ""); currentWeightInt = Integer.parseInt(currentWeight); current.setText("currently " + currentWeight); goalS = preferences.getString("goal", " "); goal.setText("goal: " + goalS); } // your other methods... private void weightLoss() { if (weightUpdate < currentWeightInt) { SharedPreferences preferences = PreferenceManager.getDefaultSharedPreferences(this); int toSet = preferences.getInt("progress",0); progress.setProgress(toSet); SharedPreferences.Editor editor = preferences.edit(); editor.putString("current", Integer.toString(weightUpdate)); editor.commit(); double first = (Double.parseDouble(startS) - Double .parseDouble(currentWeight)); double second = (Double.parseDouble(startS) - Double .parseDouble(goalS)); double last = first / second; double result = last * 100; int resultInt = (int) result; progress.setProgress(resultInt); editor.putInt("progress", resultInt); editor.commit(); refresh(); // DO THIS HERE INSTEAD OF RESTARTING THE ACTIVITY } } </code></pre>

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