SharedPreferences工具类
/**
* Date: 4/1/21 11:55 AM
* Description: sp存储数据
*/
public class SharedPreferencesUtil {
public static final String PREFERENCE_NAME = "SharedPreferencesUtil";
private SharedPreferencesUtil() {
throw new AssertionError();
}
/**
* put string preferences .@param context
*
* @param key The name of the preference to modify
* @param value The new value for the preference
* @return True if the new values were successfully written to persistent
* storage.
*/
public static boolean putString(Context context, String key, String value) {
SharedPreferences settings = context.getSharedPreferences(PREFERENCE_NAME, Context.MODE_PRIVATE);
Editor editor = settings.edit();
editor.putString(key, value);
return editor.commit();
}
/**
* get string preferences .@param context
*
* @param key The name of the preference to retrieve
* @return The preference value if it exists, or null. Throws
* ClassCastException if there is a preference with this name that is
* not a string
* @see #getString(Context, String, String)
*/
public static String getString(Context context, String key) {
return getString(context, key, "");
}
/**
* get string preferences .@param context
*
* @param key The name of the preference to retrieve
* @param defaultValue Value to common_icon_back if this preference does not exist
* @return The preference value if it exists, or defValue. Throws
* ClassCastException if there is a preference with this name that is
* not a string
*/
public static String getString(Context context, String key,
String defaultValue) {
SharedPreferences settings = context.getSharedPreferences(PREFERENCE_NAME,
Context.MODE_PRIVATE);
return settings.getString(key, defaultValue);
}
/**
* put int preferences .@param context
*
* @param key The name of the preference to modify
* @param value The new value for the preference
* @return True if the new values were successfully written to persistent
* storage.
*/
public static boolean putInt(Context context, String key, int value) {
SharedPreferences settings = context.getSharedPreferences(PREFERENCE_NAME,
Context.MODE_PRIVATE);
Editor editor = settings.edit();
editor.putInt(key, value);
return editor.commit();
}
/**
* get int preferences .@param context
*
* @param key The name of the preference to retrieve
* @return The preference value if it exists, or -1. Throws ClassCastException
* if there is a preference with this name that is not a int
* @see #getInt(Context, String, int)
*/
public static int getInt(Context context, String key) {
return getInt(context, key, -1);
}
/**
* get int preferences .@param context
*
* @param key The name of the preference to retrieve
* @param defaultValue Value to common_icon_back if this preference does not exist
* @return The preference value if it exists, or defValue. Throws
* ClassCastException if there is a preference with this name that is
* not a int
*/
public static int getInt(Context context, String key, int defaultValue) {
SharedPreferences settings = context.getSharedPreferences(PREFERENCE_NAME,
Context.MODE_PRIVATE);
try {
return settings.getInt(key, defaultValue);
} catch (Exception e) {
Log.e(PREFERENCE_NAME, e.toString());
}
return defaultValue;
}
/**
* put long preferences .@param context
*
* @param key The name of the preference to modify
* @param value The new value for the preference
* @return True if the new values were successfully written to persistent
* storage.
*/
public static boolean putLong(Context context, String key, long value) {
SharedPreferences settings = context.getSharedPreferences(PREFERENCE_NAME,
Context.MODE_PRIVATE);
Editor editor = settings.edit();
editor.putLong(key, value);
return editor.commit();
}
/**
* get long preferences .@param context
*
* @param key The name of the preference to retrieve
* @return The preference value if it exists, or -1. Throws ClassCastException
* if there is a preference with this name that is not a long
* @see #getLong(Context, String, long)
*/
public static long getLong(Context context, String key) {
return getLong(context, key, -1);
}
/**
* get long preferences .@param context
*
* @param key The name of the preference to retrieve
* @param defaultValue Value to common_icon_back if this preference does not exist
* @return The preference value if it exists, or defValue. Throws
* ClassCastException if there is a preference with this name that is
* not a long
*/
public static long getLong(Context context, String key, long defaultValue) {
SharedPreferences settings = context.getSharedPreferences(PREFERENCE_NAME,
Context.MODE_PRIVATE);
try {
return settings.getLong(key, defaultValue);
} catch (Exception e) {
Log.e(PREFERENCE_NAME, e.toString());
}
return defaultValue;
}
/**
* put float preferences .@param context
*
* @param key The name of the preference to modify
* @param value The new value for the preference
* @return True if the new values were successfully written to persistent
* storage.
*/
public static boolean putFloat(Context context, String key, float value) {
SharedPreferences settings = context.getSharedPreferences(PREFERENCE_NAME,
Context.MODE_PRIVATE);
Editor editor = settings.edit();
editor.putFloat(key, value);
return editor.commit();
}
/**
* get float preferences .@param context
*
* @param key The name of the preference to retrieve
* @return The preference value if it exists, or -1. Throws ClassCastException
* if there is a preference with this name that is not a float
* @see #getFloat(Context, String, float)
*/
public static float getFloat(Context context, String key) {
return getFloat(context, key, 0);
}
/**
* get float preferences .@param context
*
* @param key The name of the preference to retrieve
* @param defaultValue Value to common_icon_back if this preference does not exist
* @return The preference value if it exists, or defValue. Throws
* ClassCastException if there is a preference with this name that is
* not a float
*/
public static float getFloat(Context context, String key, float defaultValue) {
SharedPreferences settings = context.getSharedPreferences(PREFERENCE_NAME,
Context.MODE_PRIVATE);
try {
return settings.getFloat(key, defaultValue);
} catch (Exception e) {
Log.e(PREFERENCE_NAME, e.toString());
}
return 0f;
}
/**
* put boolean preferences .@param context
*
* @param key The name of the preference to modify
* @param value The new value for the preference
* @return True if the new values were successfully written to persistent
* storage.
*/
public static boolean putBoolean(Context context, String key, boolean value) {
SharedPreferences settings = context.getSharedPreferences(PREFERENCE_NAME,
Context.MODE_PRIVATE);
Editor editor = settings.edit();
editor.putBoolean(key, value);
return editor.commit();
}
/**
* get boolean preferences, default is false .@param context
*
* @param key The name of the preference to retrieve
* @return The preference value if it exists, or false. Throws
* ClassCastException if there is a preference with this name that is
* not a boolean
* @see #getBoolean(Context, String, boolean)
*/
public static boolean getBoolean(Context context, String key) {
return getBoolean(context, key, false);
}
/**
* get boolean preferences .@param context
*
* @param key The name of the preference to retrieve
* @param defaultValue Value to common_icon_back if this preference does not exist
* @return The preference value if it exists, or defValue. Throws
* ClassCastException if there is a preference with this name that is
* not a boolean
*/
public static boolean getBoolean(Context context, String key,
boolean defaultValue) {
SharedPreferences settings = context.getSharedPreferences(PREFERENCE_NAME,
Context.MODE_PRIVATE);
return settings.getBoolean(key, defaultValue);
}
/**
* removeSharedPreferenceByKey:【remove obj in preferences】. <br/>
* .@param context .@param key .@common_icon_back.<br/>
*/
public static boolean removeSharedPreferenceByKey(Context context, String key) {
SharedPreferences settings = context.getSharedPreferences(PREFERENCE_NAME,
Context.MODE_PRIVATE);
Editor editor = settings.edit();
editor.remove(key);
return editor.commit();
}
/**
* put int preferences .@param context
*
* @return True if the new values were successfully written to persistent
* storage.
*/
public static boolean clean(Context context) {
SharedPreferences settings = context.getSharedPreferences(PREFERENCE_NAME,
Context.MODE_PRIVATE);
Editor editor = settings.edit();
editor.clear();
return editor.commit();
}
}
具体存储list使用
/**
* Date: 4/1/21 11:55 AM
* Description: 本地维护下载任务文件名和id
*/
public class FlieDownloadSpDataUtil {
private static final String FLIEDOWNLOAD_SP_DATA = "FLIEDOWNLOAD_SP_DATA";
/**
* @param context 上下文
*/
public static void setPhoneDevicesPidRules(Context context, ArrayList<FileDownLoadBeen> devicesPidRule) {
Gson gson = new Gson();
String data = gson.toJson(devicesPidRule);
SharedPreferencesUtil.putString(context, FLIEDOWNLOAD_SP_DATA, data);
}
/**
* 获取列表模式
*/
public static ArrayList<FileDownLoadBeen> getPhoneDevicesPidRules(Context context) {
ArrayList<FileDownLoadBeen> devicesPidRule = new ArrayList<>();
String devicesPidRuleJson = SharedPreferencesUtil.getString(context, FLIEDOWNLOAD_SP_DATA,"");
if(devicesPidRuleJson!=""){
Gson gson = new Gson();
devicesPidRule = gson.fromJson(devicesPidRuleJson, new TypeToken<ArrayList<FileDownLoadBeen>>() {}.getType());
}
return devicesPidRule;
}
}
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