本文整理了Java中android.content.SharedPreferences.contains()方法的一些代码示例，展示了SharedPreferences.contains()的具体用法。这些代码示例主要来源于Github/Stackoverflow/Maven等平台，是从一些精选项目中提取出来的代码，具有较强的参考意义，能在一定程度帮忙到你。SharedPreferences.contains()方法的具体详情如下：
包路径：android.content.SharedPreferences
类名称：SharedPreferences
方法名：contains

SharedPreferences.contains介绍

[英]Checks whether the preferences contains a preference.
[中]检查首选项是否包含首选项。

代码示例

代码示例来源：origin: libgdx/libgdx

@Override
public boolean contains (String key) {
  return sharedPrefs.contains(key);
}

代码示例来源：origin: libgdx/libgdx

@Override
public boolean contains (String key) {
  return sharedPrefs.contains(key);
}

代码示例来源：origin: androidannotations/androidannotations

public final boolean exists() {
  return sharedPreferences.contains(key);
}

代码示例来源：origin: facebook/facebook-android-sdk

private boolean hasCachedAccessToken() {
  return sharedPreferences.contains(CACHED_ACCESS_TOKEN_KEY);
}

代码示例来源：origin: smuyyh/BookReader

public boolean exists(String key) {
  return prefs.contains(key);
}

代码示例来源：origin: stackoverflow.com

double getDouble(final SharedPreferences prefs, final String key, final double defaultValue) {
if ( !prefs.contains(key))
    return defaultValue;

return Double.longBitsToDouble(prefs.getLong(key, 0));
}

代码示例来源：origin: stackoverflow.com

SharedPreferences spref = PreferenceManager.getDefaultSharedPreferences(this);
if (spref.contains("email")) {
   String sEmailAddr = spref.getString("email", "");
}

代码示例来源：origin: HotBitmapGG/bilibili-android-client

public static boolean hasString(String key) {
  SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(BilibiliApp.getInstance());
  return sharedPreferences.contains(key);
}

代码示例来源：origin: grandcentrix/tray

@Override
public boolean shouldMigrate() {
  if (mPreferences.contains(mSharedPrefsKey)) {
    return true;
  }
  TrayLog.v("key '" + mSharedPrefsKey + "' in SharedPreferences '"
      + mSharedPrefsName + "' not found. skipped import");
  return false;
}

代码示例来源：origin: hidroh/materialistic

@Synthetic
  boolean hasOldValue(Context context, SharedPreferences sp) {
    return sp.contains(context.getString(oldKey));
  }
}

代码示例来源：origin: ankidroid/Anki-Android

private Long getLastDeckId() {
  SharedPreferences state = getSharedPreferences(PERSISTENT_STATE_FILE,0);
  if (!state.contains(LAST_DECK_ID_KEY)) {
    return null;
  }
  return state.getLong(LAST_DECK_ID_KEY, -1);
}

代码示例来源：origin: facebook/facebook-android-sdk

public static SourceApplicationInfo getStoredSourceApplicatioInfo() {
  SharedPreferences sharedPreferences =
      PreferenceManager.getDefaultSharedPreferences(
          FacebookSdk.getApplicationContext());
  if (!sharedPreferences.contains(CALL_APPLICATION_PACKAGE_KEY)) {
    return null;
  }
  String callingApplicationPackage = sharedPreferences.getString(
      CALL_APPLICATION_PACKAGE_KEY,
      null);
  boolean openedByAppLink = sharedPreferences.getBoolean(OPENED_BY_APP_LINK_KEY, false);
  return new SourceApplicationInfo(callingApplicationPackage, openedByAppLink);
}

代码示例来源：origin: jeasonlzy/okhttp-OkGo

@Override
public synchronized boolean removeCookie(HttpUrl url) {
  if (!cookies.containsKey(url.host())) return false;
  //内存移除
  ConcurrentHashMap<String, Cookie> urlCookie = cookies.remove(url.host());
  //文件移除
  Set<String> cookieTokens = urlCookie.keySet();
  SharedPreferences.Editor prefsWriter = cookiePrefs.edit();
  for (String cookieToken : cookieTokens) {
    if (cookiePrefs.contains(COOKIE_NAME_PREFIX + cookieToken)) {
      prefsWriter.remove(COOKIE_NAME_PREFIX + cookieToken);
    }
  }
  prefsWriter.remove(url.host());
  prefsWriter.apply();
  return true;
}

代码示例来源：origin: jeasonlzy/okhttp-OkGo

/** 根据url移除当前的cookie */
@Override
public synchronized boolean removeCookie(HttpUrl url, Cookie cookie) {
  if (!cookies.containsKey(url.host())) return false;
  String cookieToken = getCookieToken(cookie);
  if (!cookies.get(url.host()).containsKey(cookieToken)) return false;
  //内存移除
  cookies.get(url.host()).remove(cookieToken);
  //文件移除
  SharedPreferences.Editor prefsWriter = cookiePrefs.edit();
  if (cookiePrefs.contains(COOKIE_NAME_PREFIX + cookieToken)) {
    prefsWriter.remove(COOKIE_NAME_PREFIX + cookieToken);
  }
  prefsWriter.putString(url.host(), TextUtils.join(",", cookies.get(url.host()).keySet()));
  prefsWriter.apply();
  return true;
}

代码示例来源：origin: TommyLemon/APIJSON

/**判断是否已存
 * @param key
 * @return
 */
public boolean isContain(String key) {
  if (StringUtil.isNotEmpty(key, true) == false) {
    Log.e(TAG, "isContain StringUtil.isNotEmpty(key, true) == false >> return false;");
    return false;
  }
  return sp.contains(StringUtil.getTrimedString(key));
}

代码示例来源：origin: TommyLemon/Android-ZBLibrary

/**判断是否已存
 * @param key
 * @return
 */
public boolean isContain(String key) {
  if (StringUtil.isNotEmpty(key, true) == false) {
    Log.e(TAG, "isContain StringUtil.isNotEmpty(key, true) == false >> return false;");
    return false;
  }
  return sp.contains(StringUtil.getTrimedString(key));
}

代码示例来源：origin: facebook/facebook-android-sdk

@Test
public void testSaveWritesToCacheIfToken() throws JSONException {
  AccessToken accessToken = createAccessToken();
  AccessTokenCache cache = new AccessTokenCache(sharedPreferences, cachingStrategyFactory);
  cache.save(accessToken);
  verify(cachingStrategy, never()).save(any(Bundle.class));
  assertTrue(sharedPreferences.contains(AccessTokenCache.CACHED_ACCESS_TOKEN_KEY));
  AccessToken savedAccessToken = AccessToken.createFromJSONObject(
      new JSONObject(sharedPreferences.getString(
          AccessTokenCache.CACHED_ACCESS_TOKEN_KEY, null)));
  assertEquals(accessToken, savedAccessToken);
}

代码示例来源：origin: facebook/facebook-android-sdk

@Test
public void testClearCacheClearsCache() {
  AccessToken accessToken = createAccessToken();
  AccessTokenCache cache = new AccessTokenCache(sharedPreferences, cachingStrategyFactory);
  cache.save(accessToken);
  cache.clear();
  assertFalse(sharedPreferences.contains(AccessTokenCache.CACHED_ACCESS_TOKEN_KEY));
  verify(cachingStrategy, never()).clear();
}

代码示例来源：origin: facebook/facebook-android-sdk

@Test
public void testClearCacheClearsLegacyCache() {
  when(FacebookSdk.isLegacyTokenUpgradeSupported()).thenReturn(true);
  AccessToken accessToken = createAccessToken();
  AccessTokenCache cache = new AccessTokenCache(sharedPreferences, cachingStrategyFactory);
  cache.save(accessToken);
  cache.clear();
  assertFalse(sharedPreferences.contains(AccessTokenCache.CACHED_ACCESS_TOKEN_KEY));
  verify(cachingStrategy, times(1)).clear();
}

代码示例来源：origin: facebook/facebook-android-sdk

@Test
public void testLoadSavesTokenWhenUpgradingFromLegacyToken() throws JSONException {
  when(FacebookSdk.isLegacyTokenUpgradeSupported()).thenReturn(true);
  AccessToken accessToken = createAccessToken();
  when(cachingStrategy.load()).thenReturn(
      AccessTokenTestHelper.toLegacyCacheBundle(accessToken));
  AccessTokenCache cache = new AccessTokenCache(sharedPreferences, cachingStrategyFactory);
  cache.load();
  assertTrue(sharedPreferences.contains(AccessTokenCache.CACHED_ACCESS_TOKEN_KEY));
  AccessToken savedAccessToken = AccessToken.createFromJSONObject(
      new JSONObject(sharedPreferences.getString(
          AccessTokenCache.CACHED_ACCESS_TOKEN_KEY, null)));
  assertEquals(accessToken, savedAccessToken);
}