android.preference.Preference#getTitle ( )源码实例Demo

@Nullable
private CharSequence getTitleOfOtherActionAssociatedWith(Long extendedKeyCode) {
  /*
   * Collect all KeyComboPreferences. It's somewhat inefficient to iterate through all
   * preferences every time, but it's only done during configuration when the user presses a
   * key. Lazily-initializing a static list would assume that there's no way a preference
   * will be added after the initialization. That assumption was not true during testing,
   * which may have been specific to the testing environment but may also indicate that
   * problematic situations can arise.
   */
  PreferenceManager preferenceManager = getPreferenceManager();
  SharedPreferences prefs = SharedPreferencesUtils.getSharedPreferences(getContext());
  Map<String, ?> prefMap = prefs.getAll();
  String myKey = getKey();
  for (String key : prefMap.keySet()) {
    if (!myKey.equals(key)) {
      Preference preference = preferenceManager.findPreference(key);
      if (preference instanceof KeyComboPreference
          && KeyAssignmentUtils.getKeyCodesForPreference(getContext(), key)
              .contains(extendedKeyCode)) {
        return preference.getTitle();
      }
    }
  }
  return null;
}
 

public static Matcher<Preference> withTitleText(final Matcher<String> titleMatcher) {
  return new TypeSafeMatcher<Preference>() {
    @Override
    public void describeTo(Description description) {
      description.appendText(" a preference with title matching: ");
      titleMatcher.describeTo(description);
    }

    @Override
    public boolean matchesSafely(Preference pref) {
      if (pref.getTitle() == null) {
        return false;
      }
      String title = pref.getTitle().toString();
      return titleMatcher.matches(title);
    }
  };
}
 

@Override
public boolean onPreferenceTreeClick(PreferenceScreen preferenceScreen, Preference preference) {
    String title = (String) preference.getTitle();
    if (title.equals("颜色风格")) {
        showThemeDialog();
        return true;
    } else if (title.equals("捐赠")) {
        donate();
        return true;
    }
    return false;
}
 

private void showOverrideKeyComboDialog(final String key) {
  final Preference currentActionPreference = getPreferenceManager().findPreference(key);
  if (currentActionPreference == null) {
    return;
  }

  final Preference newActionPreference = getPreferenceManager().findPreference(getKey());
  if (newActionPreference == null) {
    return;
  }

  CharSequence currentAction = currentActionPreference.getTitle();
  CharSequence newAction = newActionPreference.getTitle();
  setKeyEventSource(KEY_EVENT_SOURCE_ACTIVITY);
  showOverrideKeyComboDialog(
      currentAction,
      newAction,
      new DialogInterface.OnClickListener() {
        @Override
        public void onClick(DialogInterface dialog, int which) {
          if (which != DialogInterface.BUTTON_POSITIVE) {
            setKeyEventSource(getKeyEventSourceForCurrentKeyComboModel());
            return;
          }

          saveKeyCode();
          keyComboManager.getKeyComboModel().clearKeyComboCode(key);
          notifyListener(key, keyComboManager.getKeyComboModel().getKeyComboCodeForKey(key));
          Dialog mainDialog = getDialog();
          if (mainDialog != null) {
            mainDialog.dismiss();
          }
        }
      });
}
 

private void markPro(Preference pref, String sku) {
    if (sku == null || !IAB.isPurchased(sku, this)) {
        SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(this);
        boolean dark = prefs.getBoolean("dark_theme", false);
        SpannableStringBuilder ssb = new SpannableStringBuilder("  " + pref.getTitle());
        ssb.setSpan(new ImageSpan(this, dark ? R.drawable.ic_shopping_cart_white_24dp : R.drawable.ic_shopping_cart_black_24dp), 0, 1, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
        pref.setTitle(ssb);
    }
}
 

public static Matcher<Preference> withTitle(final int resourceId) {
  return new TypeSafeMatcher<Preference>() {
    private String resourceName = null;
    private String expectedText = null;

    @Override
    public void describeTo(Description description) {
      description.appendText(" with title string from resource id: ");
      description.appendValue(resourceId);
      if (null != resourceName) {
        description.appendText("[");
        description.appendText(resourceName);
        description.appendText("]");
      }
      if (null != expectedText) {
        description.appendText(" value: ");
        description.appendText(expectedText);
      }
    }

    @Override
    public boolean matchesSafely(Preference preference) {
      if (null == expectedText) {
        try {
          expectedText = preference.getContext().getResources().getString(resourceId);
          resourceName = preference.getContext().getResources().getResourceEntryName(resourceId);
        } catch (Resources.NotFoundException ignored) {
          /* view could be from a context unaware of the resource id. */
        }
      }
      if (null != expectedText && preference.getTitle() != null) {
        return expectedText.equals(preference.getTitle().toString());
      } else {
        return false;
      }
    }
  };
}