using shared peferences to save colors - colors

Question

I have an app that uses a color picking dialog to change the app background color, and the text color. The color picker works fine, but when the app closes for any reason it reverts back to default.
I have checked: http://developer.android.com/guide/topics/data/data-storage.html#pref
and
Android Shared preferences example
the below code is the result of my research. The problem I'm having is all my text fields start off without text color, when i use the color dialog the colors change just fine, but are not saved.
Any pointers on where I'm going wrong would be greatly appreciated.
public class TipCalculator extends ActionBarActivity implements ColorPickerDialog.OnColorChangedListener {
//UI element objects to be manipulated.
TextView tipper;
TextView diner;
/*few TextView items left out to save space*/
int color;
RelativeLayout RLayout;
private SharedPreferences preferences;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_tip_calculator);
preferences = getSharedPreferences("TipCalculator", MODE_PRIVATE);
//color = preferences.getInt("TipCalculator", color); did not change anything
color = preferences.getInt("bg_color", color);
RLayout = (RelativeLayout) findViewById(R.id.RLayout);//layout object for background color manipulation
bill = (EditText) findViewById(R.id.bill_amount_text);//UI elements placed in objects for text color manipulation
billNtip = (TextView) findViewById(R.id.bill_tip_text);
/*few TextView items left out to save space*/
bill.setSelection(bill.getText().length());
bill.addTextChangedListener(billWatcher);
}
#Override
public void onPause(){// onStop does not seem to change how the app currently runs
super.onPause();
/*preferences = getSharedPreferences("TipCalculator", MODE_PRIVATE);
SharedPreferences.Editor editor = preferences.edit(); does not work*/
SharedPreferences.Editor editor = getSharedPreferences("TipCalculator", MODE_PRIVATE).edit();
//editor.putInt("TipCalculator", color); does not change anything
editor.putInt("bg_color", color);
editor.commit();
tipper.setTextColor(color);
bill.setTextColor(color);
/*few TextView items left out to save space*/
}
#Override
public void colorChanged(String key, int color) {
color = newColor;
if (decide.equals("font"))
{
tipper.setTextColor(color);
bill.setTextColor(color);
/*few TextView items left out to save space*/
}
else if (decide.equals("background"))
{
RLayout.setBackgroundColor(color);
}
}

Answer 1

Save the color to the SharedPreferences in onPause() instead of onResume(), like this:
#Override
public void onPause() {
SharedPreferences.Editor editor = getSharedPreferences("TipCalculator", MODE_PRIVATE).edit();
editor.putInt("bg_color", color);
editor.commit();
super.onPause();
}
onResume() is called when your app resumes, so if you exit but don't resume, the value won't get saved.
Somewhere in your initialization you will also need to read the color value out of the SharedPreferences e.g:
preferences = getSharedPreferences("TipCalculator", MODE_PRIVATE);
color = preferences.getInt("bg_color", android.R.color.white); // default to white or whatever color you want
tipper.setTextColor(color);
bill.setTextColor(color);

Answer 2

It doesn't look like you are setting the color on the tipper and bill
objects after you load it. In onCreate() after you call getInt() add
these lines: tipper.setTextColor(color); bill.setTextColor(color); You
will need to initialize these objects first obviously. – samgak
This was the final thing I was missing.
Thanks again for the help.