Sp工具类

Sp工具类
科技前沿 • 2025-03-24 12:48 • 阅读 22
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public class SpInstance { 
    / * SP_NAME sp的名称 * applicationContext 上下文 * sharedPreferences sp */ public static final String SP_NAME = "my_sp_config"; private Context applicationContext = null; private SharedPreferences sharedPreferences = null; public static final int ERROR_CODE = -1; / * instance 单例 * INSTANCE_LOCK 互斥锁 */ private static SpInstance instance = null; private static final Object INSTANCE_LOCK = new Object(); / * 获取单例 * * @return */ public static SpInstance getInstance() { 
    if (instance == null) { 
    synchronized (INSTANCE_LOCK) { 
    if (instance == null) { 
    instance = new SpInstance(); } } } return instance; } / * 初始化 * * @param context */ public void init(Context context) { 
    this.applicationContext = context.getApplicationContext(); } / * 获取 sp * * @return */ private SharedPreferences getSp() { 
    if (sharedPreferences == null) { 
    sharedPreferences = applicationContext.getSharedPreferences(SP_NAME, Context.MODE_PRIVATE); } return sharedPreferences; } / * 获取编辑 * * @return */ private SharedPreferences.Editor getEdit() { 
    return getSp().edit(); } / * 存值至 sp * * @param key * @param value * @param <T> */ public <T> void put(String key, T value) { 
    if (getEdit() != null) { 
    if (value instanceof Boolean) { 
    getEdit().putBoolean(key, (Boolean) value).commit(); } else if (value instanceof String) { 
    getEdit().putString(key, (String) value).commit(); } else if (value instanceof Integer) { 
    getEdit().putInt(key, (Integer) value).commit(); } else if (value instanceof Float) { 
    getEdit().putFloat(key, (Float) value).commit(); } else if (value instanceof Long) { 
    getEdit().putLong(key, (Long) value).commit(); } } } public boolean getBoolean(String key, boolean defaultValue) { 
    if (getSp() != null) { 
    return getSp().getBoolean(key, defaultValue); } return false; } public String getString(String key, String defaultValue) { 
    if (getSp() != null) { 
    return getSp().getString(key, defaultValue); } return ""; } public int getInt(String key, int defaultValue) { 
    if (getSp() != null) { 
    return getSp().getInt(key, defaultValue); } return ERROR_CODE; } public float getFloat(String key, float defaultValue) { 
    if (getSp() != null) { 
    return getSp().getFloat(key, defaultValue); } return ERROR_CODE; } public long getLong(String key, long defaultValue) { 
    if (getSp() != null) { 
    return getSp().getLong(key, defaultValue); } return ERROR_CODE; } }
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