title: Settings fragment crash on click android studio
body: <p>I used the template "Settings Activity" in android studio, I created my own settings Fragment, added the code to the Java file.</p>
  
  <pre><code>@TargetApi(Build.VERSION_CODES.HONEYCOMB)
  public static class LocationServicesPreferenceFragment extends PreferenceFragment{
      @Override
      public void onCreate(Bundle savedInstanceState) {
          super.onCreate(savedInstanceState);
          addPreferencesFromResource(R.xml.pref_location_services);
          setHasOptionsMenu(true);
          bindPreferenceSummaryToValue(findPreference("location_services"));
      }
      @Override
      public boolean onOptionsItemSelected(MenuItem item) {
          int id = item.getItemId();
          if (id == android.R.id.home) {
              startActivity(new Intent(getActivity(), SettingsActivity.class));
              return true;
          }
          return super.onOptionsItemSelected(item);
      }
  }
  </code></pre>
  
  <p>And I edited this method</p>
  
  <pre><code>protected boolean isValidFragment(String fragmentName) {
      return PreferenceFragment.class.getName().equals(fragmentName)
              || GeneralPreferenceFragment.class.getName().equals(fragmentName)
              || DataSyncPreferenceFragment.class.getName().equals(fragmentName)
              || NotificationPreferenceFragment.class.getName().equals(fragmentName)
              || LocationServicesPreferenceFragment.class.getName().equals(fragmentName);
  }
  </code></pre>
  
  <p>This is the result rendered</p>
  
  <p><img src="https://i.stack.imgur.com/xFaj4.png" alt="Settings"></p>
  
  <p>but this is what happens when I click my option, Other 3 options work perfectly</p>
  
  <p><img src="https://i.stack.imgur.com/ljlGG.png" alt="Crash"></p>
  
  <p>Any ideas to fix this problem??</p>
  
  <p>LogCat</p>
  
  <pre><code>   03-17 11:36:44.582 4178-4178/com.example.devandrin.myapplication I/art: Not late-enabling -Xcheck:jni (already on)
      03-17 11:36:44.583 4178-4178/com.example.devandrin.myapplication W/art: Unexpected CPU variant for X86 using defaults: x86
      03-17 11:36:44.708 4178-4178/com.example.devandrin.myapplication W/System: ClassLoader referenced unknown path: /data/app/com.example.devandrin.myapplication-1/lib/x86
      03-17 11:36:44.713 4178-4178/com.example.devandrin.myapplication I/InstantRun: Starting Instant Run Server for com.example.devandrin.myapplication
      03-17 11:36:45.392 4178-4178/com.example.devandrin.myapplication W/art: Before Android 4.1, method android.graphics.PorterDuffColorFilter android.support.graphics.drawable.VectorDrawableCompat.updateTintFilter(android.graphics.PorterDuffColorFilter, android.content.res.ColorStateList, android.graphics.PorterDuff$Mode) would have incorrectly overridden the package-private method in android.graphics.drawable.Drawable
      03-17 11:36:45.791 4178-4207/com.example.devandrin.myapplication I/OpenGLRenderer: Initialized EGL, version 1.4
      03-17 11:36:45.791 4178-4207/com.example.devandrin.myapplication D/OpenGLRenderer: Swap behavior 1
      03-17 11:36:45.791 4178-4207/com.example.devandrin.myapplication W/OpenGLRenderer: Failed to choose config with EGL_SWAP_BEHAVIOR_PRESERVED, retrying without...
      03-17 11:36:45.791 4178-4207/com.example.devandrin.myapplication D/OpenGLRenderer: Swap behavior 0
      03-17 11:36:45.916 4178-4178/com.example.devandrin.myapplication W/art: Before Android 4.1, method int android.support.v7.widget.ListViewCompat.lookForSelectablePosition(int, boolean) would have incorrectly overridden the package-private method in android.widget.ListView
      03-17 11:37:31.093 4178-4207/com.example.devandrin.myapplication D/OpenGLRenderer: endAllActiveAnimators on 0x9b4fe900 (RippleDrawable) with handle 0xa1f03f20
      03-17 11:37:34.305 4178-4207/com.example.devandrin.myapplication W/OpenGLRenderer: Points are too far apart 4.000001
      03-17 11:37:36.027 4178-4207/com.example.devandrin.myapplication W/OpenGLRenderer: Points are too far apart 4.000001
      03-17 11:37:49.258 4178-4183/com.example.devandrin.myapplication I/art: Do partial code cache collection, code=29KB, data=29KB
      03-17 11:37:49.265 4178-4183/com.example.devandrin.myapplication I/art: After code cache collection, code=22KB, data=26KB
      03-17 11:37:49.265 4178-4183/com.example.devandrin.myapplication I/art: Increasing code cache capacity to 128KB
      03-17 11:37:49.274 4178-4178/com.example.devandrin.myapplication D/AndroidRuntime: Shutting down VM
      03-17 11:37:49.276 4178-4178/com.example.devandrin.myapplication E/AndroidRuntime: FATAL EXCEPTION: main
                                                                                         Process: com.example.devandrin.myapplication, PID: 4178
                                                                                         java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.devandrin.myapplication/com.example.devandrin.myapplication.SettingsActivity}: java.lang.ClassCastException: java.lang.Boolean cannot be cast to java.lang.String
                                                                                             at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2665)
                                                                                             at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2726)
                                                                                             at android.app.ActivityThread.-wrap12(ActivityThread.java)
                                                                                             at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1477)
                                                                                             at android.os.Handler.dispatchMessage(Handler.java:102)
                                                                                             at android.os.Looper.loop(Looper.java:154)
                                                                                             at android.app.ActivityThread.main(ActivityThread.java:6119)
                                                                                             at java.lang.reflect.Method.invoke(Native Method)
                                                                                             at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:886)
                                                                                             at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:776)
                                                                                          Caused by: java.lang.ClassCastException: java.lang.Boolean cannot be cast to java.lang.String
                                                                                             at android.app.SharedPreferencesImpl.getString(SharedPreferencesImpl.java:225)
                                                                                             at com.example.devandrin.myapplication.SettingsActivity.bindPreferenceSummaryToValue(SettingsActivity.java:122)
                                                                                             at com.example.devandrin.myapplication.SettingsActivity.access$000(SettingsActivity.java:38)
                                                                                             at com.example.devandrin.myapplication.SettingsActivity$LocationServicesPreferenceFragment.onCreate(SettingsActivity.java:250)
                                                                                             at android.app.Fragment.performCreate(Fragment.java:2336)
                                                                                             at android.app.FragmentManagerImpl.moveToState(FragmentManager.java:949)
                                                                                             at android.app.BackStackRecord.setLastIn(BackStackRecord.java:860)
                                                                                             at android.app.BackStackRecord.calculateFragments(BackStackRecord.java:900)
                                                                                             at android.app.BackStackRecord.run(BackStackRecord.java:728)
                                                                                             at android.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:1578)
                                                                                             at android.app.FragmentController.execPendingActions(FragmentController.java:371)
                                                                                             at android.app.Activity.performStart(Activity.java:6695)
                                                                                             at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2628)
                                                                                             at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2726) 
                                                                                             at android.app.ActivityThread.-wrap12(ActivityThread.java) 
                                                                                             at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1477) 
                                                                                             at android.os.Handler.dispatchMessage(Handler.java:102) 
                                                                                             at android.os.Looper.loop(Looper.java:154) 
                                                                                             at android.app.ActivityThread.main(ActivityThread.java:6119) 
                                                                                             at java.lang.reflect.Method.invoke(Native Method) 
                                                                                             at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:886) 
                                                                                             at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:776) 
  </code></pre>
  
  <p>Code </p>
  
  <pre><code>public class SettingsActivity extends AppCompatPreferenceActivity {
      /**
       * A preference value change listener that updates the preference's summary
       * to reflect its new value.
       */
      private static Preference.OnPreferenceChangeListener sBindPreferenceSummaryToValueListener = new Preference.OnPreferenceChangeListener() {
          @Override
          public boolean onPreferenceChange(Preference preference, Object value) {
              String stringValue = value.toString();
  
              if (preference instanceof ListPreference) {
                  // For list preferences, look up the correct display value in
                  // the preference's 'entries' list.
                  ListPreference listPreference = (ListPreference) preference;
                  int index = listPreference.findIndexOfValue(stringValue);
  
                  // Set the summary to reflect the new value.
                  preference.setSummary(
                          index &gt;= 0
                                  ? listPreference.getEntries()[index]
                                  : null);
  
              } else if (preference instanceof RingtonePreference) {
                  // For ringtone preferences, look up the correct display value
                  // using RingtoneManager.
                  if (TextUtils.isEmpty(stringValue)) {
                      // Empty values correspond to 'silent' (no ringtone).
                      preference.setSummary(R.string.pref_ringtone_silent);
  
                  } else {
                      Ringtone ringtone = RingtoneManager.getRingtone(
                              preference.getContext(), Uri.parse(stringValue));
  
                      if (ringtone == null) {
                          // Clear the summary if there was a lookup error.
                          preference.setSummary(null);
                      } else {
                          // Set the summary to reflect the new ringtone display
                          // name.
                          String name = ringtone.getTitle(preference.getContext());
                          preference.setSummary(name);
                      }
                  }
  
              } else {
                  /*
                  For all other preferences, set the summary to the value's
                  simple string representation.
                  */
                  preference.setSummary(stringValue);
              }
              return true;
          }
      };
  
      /**
       * Helper method to determine if the device has an extra-large screen. For
       * example, 10" tablets are extra-large.
       */
      private static boolean isXLargeTablet(Context context) {
          return (context.getResources().getConfiguration().screenLayout
                  &amp; Configuration.SCREENLAYOUT_SIZE_MASK) &gt;= Configuration.SCREENLAYOUT_SIZE_XLARGE;
      }
  
      /**
       * Binds a preference's summary to its value. More specifically, when the
       * preference's value is changed, its summary (line of text below the
       * preference title) is updated to reflect the value. The summary is also
       * immediately updated upon calling this method. The exact display format is
       * dependent on the type of preference.
       *
       * @see #sBindPreferenceSummaryToValueListener
       */
      private static void bindPreferenceSummaryToValue(Preference preference) {
          // Set the listener to watch for value changes.
          preference.setOnPreferenceChangeListener(sBindPreferenceSummaryToValueListener);
  
          /*
          Trigger the listener immediately with the preference's
          current value.
          */
          sBindPreferenceSummaryToValueListener.onPreferenceChange(preference,
                  PreferenceManager
                          .getDefaultSharedPreferences(preference.getContext())
                          .getString(preference.getKey(), ""));
      }
  
      @Override
      protected void onCreate(Bundle savedInstanceState) {
          super.onCreate(savedInstanceState);
          setupActionBar();
      }
  
      /**
       * Set up the {@link android.app.ActionBar}, if the API is available.
       */
      private void setupActionBar() {
          ActionBar actionBar = getSupportActionBar();
          if (actionBar != null) {
              // Show the Up button in the action bar.
              actionBar.setDisplayHomeAsUpEnabled(true);
          }
      }
  
      @Override
      public boolean onMenuItemSelected(int featureId, MenuItem item) {
          int id = item.getItemId();
          if (id == android.R.id.home) {
              if (!super.onMenuItemSelected(featureId, item)) {
                  NavUtils.navigateUpFromSameTask(this);
              }
              return true;
          }
          return super.onMenuItemSelected(featureId, item);
      }
  
      /**
       * {@inheritDoc}
       */
      @Override
      public boolean onIsMultiPane() {
          return isXLargeTablet(this);
      }
  
      /**
       * {@inheritDoc}
       */
      @Override
      @TargetApi(Build.VERSION_CODES.HONEYCOMB)
      public void onBuildHeaders(List&lt;Header&gt; target) {
          loadHeadersFromResource(R.xml.pref_headers, target);
      }
  
      /**
       * This method stops fragment injection in malicious applications.
       * Make sure to deny any unknown fragments here.
       */
      protected boolean isValidFragment(String fragmentName) {
          return PreferenceFragment.class.getName().equals(fragmentName)
                  || GeneralPreferenceFragment.class.getName().equals(fragmentName)
                  || DataSyncPreferenceFragment.class.getName().equals(fragmentName)
                  || NotificationPreferenceFragment.class.getName().equals(fragmentName)
                  || LocationServicesPreferenceFragment.class.getName().equals(fragmentName);
      }
  
      /**
       * This fragment shows general preferences only. It is used when the
       * activity is showing a two-pane settings UI.
       */
      @TargetApi(Build.VERSION_CODES.HONEYCOMB)
      public static class GeneralPreferenceFragment extends PreferenceFragment {
          @Override
          public void onCreate(Bundle savedInstanceState) {
              super.onCreate(savedInstanceState);
              addPreferencesFromResource(R.xml.pref_general);
              setHasOptionsMenu(true);
  
              // Bind the summaries of EditText/List/Dialog/Ringtone preferences
              // to their values. When their values change, their summaries are
              // updated to reflect the new value, per the Android Design
              // guidelines.
              bindPreferenceSummaryToValue(findPreference("example_text"));
              bindPreferenceSummaryToValue(findPreference("example_list"));
          }
  
          @Override
          public boolean onOptionsItemSelected(MenuItem item) {
              int id = item.getItemId();
              if (id == android.R.id.home) {
                  startActivity(new Intent(getActivity(), SettingsActivity.class));
                  return true;
              }
              return super.onOptionsItemSelected(item);
          }
      }
  
      /**
       * This fragment shows notification preferences only. It is used when the
       * activity is showing a two-pane settings UI.
       */
      @TargetApi(Build.VERSION_CODES.HONEYCOMB)
      public static class NotificationPreferenceFragment extends PreferenceFragment {
          @Override
          public void onCreate(Bundle savedInstanceState) {
              super.onCreate(savedInstanceState);
              addPreferencesFromResource(R.xml.pref_notification);
              setHasOptionsMenu(true);
  
              // Bind the summaries of EditText/List/Dialog/Ringtone preferences
              // to their values. When their values change, their summaries are
              // updated to reflect the new value, per the Android Design
              // guidelines.
              bindPreferenceSummaryToValue(findPreference("notifications_new_message_ringtone"));
          }
  
          @Override
          public boolean onOptionsItemSelected(MenuItem item) {
              int id = item.getItemId();
              if (id == android.R.id.home) {
                  startActivity(new Intent(getActivity(), SettingsActivity.class));
                  return true;
              }
              return super.onOptionsItemSelected(item);
          }
      }
      @TargetApi(Build.VERSION_CODES.HONEYCOMB)
      public static class LocationServicesPreferenceFragment extends PreferenceFragment{
          @Override
          public void onCreate(Bundle savedInstanceState) {
              super.onCreate(savedInstanceState);
              addPreferencesFromResource(R.xml.pref_location_services);
              setHasOptionsMenu(true);
              bindPreferenceSummaryToValue(findPreference("location_services"));
          }
          @Override
          public boolean onOptionsItemSelected(MenuItem item) {
              int id = item.getItemId();
              if (id == android.R.id.home) {
                  startActivity(new Intent(getActivity(), SettingsActivity.class));
                  return true;
              }
              return super.onOptionsItemSelected(item);
          }
      }
      /**
       * This fragment shows data and sync preferences only. It is used when the
       * activity is showing a two-pane settings UI.
       */
      @TargetApi(Build.VERSION_CODES.HONEYCOMB)
      public static class DataSyncPreferenceFragment extends PreferenceFragment {
          @Override
          public void onCreate(Bundle savedInstanceState) {
              super.onCreate(savedInstanceState);
              addPreferencesFromResource(R.xml.pref_data_sync);
              setHasOptionsMenu(true);
  
              // Bind the summaries of EditText/List/Dialog/Ringtone preferences
              // to their values. When their values change, their summaries are
              // updated to reflect the new value, per the Android Design
              // guidelines.
              bindPreferenceSummaryToValue(findPreference("sync_frequency"));
          }
  
          @Override
          public boolean onOptionsItemSelected(MenuItem item) {
              int id = item.getItemId();
              if (id == android.R.id.home) {
                  startActivity(new Intent(getActivity(), SettingsActivity.class));
                  return true;
              }
              return super.onOptionsItemSelected(item);
          }
      }
  }
  </code></pre>