工具类基本功能说明：
1、保存基本数据类型数据；
2、读取基本数据类型数据；
3、依据key删除对应value；
4、清除SharedPreferences缓存数据静态方法；

package helper;

import android.annotation.SuppressLint;
import android.content.Context;
import android.content.SharedPreferences;
import android.content.SharedPreferences.Editor;
import android.text.TextUtils;

public class SharedPreferenceHelper {

    public static final String SHARED_PREFERENCES = "Study";

    /** * 保存基本数据类型的数据 * @param context * @param key * @param value */
    @SuppressLint("CommitPrefEdits")
    public static void saveValue(Context context, String key, Object value) {

        SharedPreferences.Editor editor = context.getSharedPreferences(SHARED_PREFERENCES, 0).edit();

        if (!TextUtils.isEmpty(key) && value != null) {

            if (value instanceof String) {
                editor.putString(key, (String)value);

            } else if (value instanceof Integer) {
                editor.putInt(key, (Integer) value);

            } else if (value instanceof Long) {
                editor.putLong(key, (Long) value);

            } else if (value instanceof Float) {
                editor.putFloat(key, (Float) value);

            } else if (value instanceof Boolean) {
                editor.putBoolean(key, (Boolean)value);

            }
        }
    }

    /** * 读取基本数据类型的数据 * @param context * @param key * @param classT * @return */
    @SuppressWarnings("unchecked")
    public static <T> T getValue(Context context, String key, Class<T> classT) {

        SharedPreferences sharedPreferences = context.getSharedPreferences(SHARED_PREFERENCES, 0);

        if (!TextUtils.isEmpty(key) && classT != null) {
            String className = classT.getSimpleName();

            if ("String".equals(className)) {
                return (T) sharedPreferences.getString(key, null);

            } else if ("Integer".equals(className)) {
                return (T) Integer.valueOf(sharedPreferences.getInt(key, -1));

            } else if ("Long".equals(className)) {
                return (T) Long.valueOf(sharedPreferences.getLong(key, -1));

            } else if ("Float".equals(className)) {
                return (T) Float.valueOf(sharedPreferences.getFloat(key, -1));

            } else if ("Boolean".equals(className)) {
                return (T) Boolean.valueOf(sharedPreferences.getBoolean(key, false));

            }
        }

        return null;
    }

    /** * 删除值 * @param context * @param key */
    @SuppressLint("CommitPrefEdits")
    public static void deleteValue(Context context, String key) {
        SharedPreferences sharedPreferences = context.getSharedPreferences(SHARED_PREFERENCES, 0);
        Editor editor = sharedPreferences.edit();
        editor.remove(key);
    }

    /** * 清除缓存数据 * @param context */
    @SuppressLint("CommitPrefEdits")
    public static void clearData(Context context) {
        SharedPreferences sharedPreferences = context.getSharedPreferences(SHARED_PREFERENCES, 0);
        Editor editor = sharedPreferences.edit();
        editor.clear();
    }
}