EditText Input speicher und wiederherstellen...

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);

    bCalculate = (Button) findViewById(R.id.bCalculate);
    display = (TextView) findViewById(R.id.TvDisplay);

    AdView ad = (AdView) findViewById(R.id.ad);
    ad.loadAd(new AdRequest());

    bCalculate.setOnClickListener(new View.OnClickListener() {

        public void onClick(View v) {
            // TODO Auto-generated method stub

            InputMethodManager inputManager = (InputMethodManager) getSystemService(Context.INPUT_METHOD_SERVICE);

            inputManager.hideSoftInputFromWindow(getCurrentFocus()
                    .getWindowToken(), InputMethodManager.HIDE_NOT_ALWAYS);

            int error = 0;
            int anzahlGraden = 0;
            double d1 = 0.0, d2 = 0.0, d3 = 0.0, d4 = 0.0, d5 = 0.0, d6 = 0.0, d7 = 0.0, d8 = 0.0, d9 = 0.0, d10 = 0.0;

            EditText Grade1r = (EditText) findViewById(R.id.Grade1r);
            String Grade1 = Grade1r.getText().toString(); if (error > 8) {
                display.setText("Please enter more then 2 grades.");
            } else {

                double gesamt = d1 + d2 + d3 + d4 + d5 + d6 + d7 + d8 + d9
                        + d10;

                double resultat = gesamt / anzahlGraden;

                display.setText("Your average is " + resultat);

            }

             mPrefs = getSharedPreferences(Grade1, 0);

             String rememberedText1 = mPrefs.getString("grade1r", "");
             grade1r = (EditText) findViewById(R.id.Grade1r);
             grade1r.setText(rememberedText1);
        }

    });

}
 protected void onPause() {
     super.onPause();

     SharedPreferences.Editor ed = mPrefs.edit();
     ed.putString("grade1r", grade1r.getText().toString());
     ed.commit();
 }