title: Sharedpreferences aren't working, default values
body: <p>My app has a lot of checkboxes in it, a spinner, edittext and a button. When I choose an item from the spinner and then enter a certain value and hit a button, a certain checkbox text changes. Now I added shared preferences and I have two problems.</p>
  
  <p>First problem is that when I try to use sharedpreferences the app crashes (as soon as I start the activity containing these sharedpreferences).</p>
  
  <pre><code>private String getItemQuantity(String key){
      SharedPreferences itemQuantitySP = getApplicationContext().getSharedPreferences("bifrostPrefs", android.content.Context.MODE_PRIVATE);
      String sp1 = "sp1";
      return itemQuantitySP.getString(key, sp1);
  }
  private void saveItemQuantity(String key, String value){
      SharedPreferences itemQuantitySP = getApplicationContext().getSharedPreferences("bifrostPrefs", android.content.Context.MODE_PRIVATE);
      SharedPreferences.Editor editor = itemQuantitySP.edit();
      editor.putString(key, value);
      editor.commit();
  }
  </code></pre>
  
  <p>Saving sharedpreferences:</p>
  
  <pre><code>if (Integer.parseInt(quantityEditText.getText().toString()) == 250)
  {
      cb4.setText("Elaborate Totem (" + item1 + "/250)");
      saveItemQuantity("cb4", cb4.getText().toString());
      cb4.setChecked(true);
  }
  ... //REST OF THE CODE
  </code></pre>
  
  <p>Getting sharedpreferences:</p>
  
  <pre><code>protected void onCreate(Bundle savedInstanceState) {
      super.onCreate(savedInstanceState);
      setContentView(R.layout.activity_bifrost);
  
      getItemQuantity("cb4");
  ... //REST OF THE CODE
  </code></pre>
  
  <p>Second problem is that I have a lot of checkboxes and setting default value for every single one of them would be very time consuming. So is there a way to simply read the default value from XML? As you can see, for now, I created a new variable called sp1 and set it as the default value, but ofcourse I want to get rid of that.</p>
  
  <p>Logcat file:</p>
  
  <pre><code>06-27 16:31:44.782: E/AndroidRuntime(13139): FATAL EXCEPTION: main
  06-27 16:31:44.782: E/AndroidRuntime(13139): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.matthewstudios.gw2legendary/com.example.gw2legendary.Bifrost}: java.lang.ClassCastException: java.lang.Boolean cannot be cast to java.lang.String
  06-27 16:31:44.782: E/AndroidRuntime(13139):    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2180)
  06-27 16:31:44.782: E/AndroidRuntime(13139):    at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2230)
  06-27 16:31:44.782: E/AndroidRuntime(13139):    at android.app.ActivityThread.access$600(ActivityThread.java:141)
  06-27 16:31:44.782: E/AndroidRuntime(13139):    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1234)
  06-27 16:31:44.782: E/AndroidRuntime(13139):    at android.os.Handler.dispatchMessage(Handler.java:99)
  06-27 16:31:44.782: E/AndroidRuntime(13139):    at android.os.Looper.loop(Looper.java:137)
  06-27 16:31:44.782: E/AndroidRuntime(13139):    at android.app.ActivityThread.main(ActivityThread.java:5041)
  06-27 16:31:44.782: E/AndroidRuntime(13139):    at java.lang.reflect.Method.invokeNative(Native Method)
  06-27 16:31:44.782: E/AndroidRuntime(13139):    at java.lang.reflect.Method.invoke(Method.java:511)
  06-27 16:31:44.782: E/AndroidRuntime(13139):    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:793)
  06-27 16:31:44.782: E/AndroidRuntime(13139):    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:560)
  06-27 16:31:44.782: E/AndroidRuntime(13139):    at dalvik.system.NativeStart.main(Native Method)
  06-27 16:31:44.782: E/AndroidRuntime(13139): Caused by: java.lang.ClassCastException: java.lang.Boolean cannot be cast to java.lang.String
  06-27 16:31:44.782: E/AndroidRuntime(13139):    at android.app.SharedPreferencesImpl.getString(SharedPreferencesImpl.java:224)
  06-27 16:31:44.782: E/AndroidRuntime(13139):    at com.example.gw2legendary.Bifrost.getItemQuantity(Bifrost.java:849)
  06-27 16:31:44.782: E/AndroidRuntime(13139):    at com.example.gw2legendary.Bifrost.onCreate(Bifrost.java:152)
  06-27 16:31:44.782: E/AndroidRuntime(13139):    at android.app.Activity.performCreate(Activity.java:5104)
  06-27 16:31:44.782: E/AndroidRuntime(13139):    at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1080)
  06-27 16:31:44.782: E/AndroidRuntime(13139):    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2144)
  06-27 16:31:44.782: E/AndroidRuntime(13139):    ... 11 more
  06-27 16:31:49.391: E/fb4a(:&lt;default&gt;):MmsConfig(13225): MmsConfig.loadMmsSettings mms_config.xml missing uaProfUrl setting
  </code></pre>
  
  <p>Part of the code:</p>
  
  <pre><code>public void submitQuantityButton (View v){
      final Spinner sItems = (Spinner)findViewById(R.id.spinner1);
      final Context context = this;
      final CheckBox cb4 = (CheckBox) findViewById(R.id.checkBox4);
      final CheckBox cb5 = (CheckBox) findViewById(R.id.checkBox5);
      final CheckBox cb6 = (CheckBox) findViewById(R.id.checkBox6);
      final CheckBox cb7 = (CheckBox) findViewById(R.id.checkBox7);
      final CheckBox cb9 = (CheckBox) findViewById(R.id.checkBox9);
      final CheckBox cb10 = (CheckBox) findViewById(R.id.checkBox10);
      final CheckBox cb11 = (CheckBox) findViewById(R.id.checkBox11);
      final CheckBox cb12 = (CheckBox) findViewById(R.id.checkBox12);
      final CheckBox cb13 = (CheckBox) findViewById(R.id.checkBox13);
      final CheckBox cb15 = (CheckBox) findViewById(R.id.checkBox15);
      final CheckBox cb16 = (CheckBox) findViewById(R.id.checkBox16);
      final CheckBox cb17 = (CheckBox) findViewById(R.id.checkBox17);
      final CheckBox cb18 = (CheckBox) findViewById(R.id.checkBox18);
      final CheckBox cb25 = (CheckBox) findViewById(R.id.checkBox25);
      final CheckBox cb27 = (CheckBox) findViewById(R.id.checkBox27);
      final CheckBox cb28 = (CheckBox) findViewById(R.id.checkBox28);
      final CheckBox cb29 = (CheckBox) findViewById(R.id.checkBox29);
      final CheckBox cb30 = (CheckBox) findViewById(R.id.checkBox30);
      final CheckBox cb31 = (CheckBox) findViewById(R.id.checkBox31);
      final CheckBox cb33 = (CheckBox) findViewById(R.id.checkBox33);
      final CheckBox cb34 = (CheckBox) findViewById(R.id.checkBox34);
      final CheckBox cb35 = (CheckBox) findViewById(R.id.checkBox35);
      final CheckBox cb36 = (CheckBox) findViewById(R.id.checkBox36);
      final CheckBox cb37 = (CheckBox) findViewById(R.id.checkBox37);
  
      //WRONG VALUE ERROR
      final AlertDialog.Builder wrongValueBuilder = new AlertDialog.Builder(context);
      wrongValueBuilder.setTitle("Warning");
      wrongValueBuilder.setMessage("The value you entered is too high!");
      wrongValueBuilder.setPositiveButton("OK", new DialogInterface.OnClickListener() {
  
          @Override
          public void onClick(DialogInterface dialog, int which) {
              dialog.cancel();
          }
      });
  
      //EMPTY TEXT ERROR
      final AlertDialog.Builder emptyETextErrorBuilder = new AlertDialog.Builder(context);
      emptyETextErrorBuilder.setTitle("Warning");
      emptyETextErrorBuilder.setMessage("Please enter a value before pressing this button");
      emptyETextErrorBuilder.setPositiveButton("OK", new DialogInterface.OnClickListener() {
  
          @Override
          public void onClick(DialogInterface dialog, int which) {
              dialog.cancel();
          }
      });
  
              final int position = sItems.getSelectedItemPosition();
              EditText quantityEditText = (EditText)findViewById(R.id.editText1);
  
              switch (position){
              case 0:
                  AlertDialog.Builder spinnerErrorBuilder = new AlertDialog.Builder(context);
                  spinnerErrorBuilder.setTitle("Warning");
                  spinnerErrorBuilder.setMessage("Please choose an item from the list above and then enter a certain value");
                  spinnerErrorBuilder.setPositiveButton("OK", new DialogInterface.OnClickListener() {
  
                      @Override
                      public void onClick(DialogInterface dialog, int id) {
                          dialog.cancel();
                      }
                  });
                  AlertDialog spinnerError = spinnerErrorBuilder.create();
                  spinnerError.show();
                  break;
              case 1:
                  String item1 = quantityEditText.getText().toString();
                  if (item1.matches(""))
                  {
                      AlertDialog emptyETextError = emptyETextErrorBuilder.create();
                      emptyETextError.show();
                  }
                  else
                  {
                      if (Integer.parseInt(quantityEditText.getText().toString()) &lt;= 250)
                      {
                          if (Integer.parseInt(quantityEditText.getText().toString()) == 250)
                          {
                              cb4.setText("Elaborate Totem (" + item1 + "/250)");
                              saveItemQuantity("cb4", cb4.getText().toString());
                              cb4.setChecked(true);
                          }
                          else
                          {
                              cb4.setText("Elaborate Totem (" + item1 + "/250)");
                              saveItemQuantity("cb4", cb4.getText().toString());
                              cb4.setChecked(false);
                          }
                      }
  </code></pre>