SPUtils.18604360

标签：return SPUtils.18604360 param editor key public String

import android.content.Context;
import android.content.SharedPreferences;

import com.google.gson.Gson;
import com.google.gson.reflect.TypeToken;

import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.lang.reflect.ParameterizedType;
import java.lang.reflect.Type;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;

/**
 * created by zyb on 2024/10/29 17:20
 */
public class SPUtils {
    /**
     * 保存在车机里面的文件名
     */
    public static final String FILE_NAME = "share_data_system";
    private volatile static SPUtils sp;
    public static SharedPreferences.Editor editor;

    public static SharedPreferences preferences;

    public SPUtils(Context context) {
        preferences = context.getSharedPreferences(FILE_NAME,
                Context.MODE_PRIVATE);
        editor = preferences.edit();
    }

    public static SPUtils getInstance(Context context) {
        if (sp == null) {
            synchronized (SPUtils.class) {
                if (sp == null) {
                    sp = new SPUtils(context);
                }
            }
        }
        return sp;
    }

    /**
     * 保存数据的方法，我们需要拿到保存数据的具体类型，然后根据类型调用不同的保存方法
     *
     * @param key
     * @param object
     */
    public void put(String key, Object object) {

        if (object instanceof String) {
            editor.putString(key, (String) object);
        } else if (object instanceof Integer) {
            editor.putInt(key, (Integer) object);
        } else if (object instanceof Boolean) {
            editor.putBoolean(key, (Boolean) object);
        } else if (object instanceof Float) {
            editor.putFloat(key, (Float) object);
        } else if (object instanceof Long) {
            editor.putLong(key, (Long) object);
        } else {
            editor.putString(key, object.toString());
        }

        SharedPreferencesCompat.apply(editor);
    }

    /**
     * 得到保存数据的方法，我们根据默认值得到保存的数据的具体类型，然后调用相对于的方法获取值
     *
     * @param key
     * @param defaultObject
     * @return
     */
    public Object get(String key, Object defaultObject) {

        if (defaultObject instanceof String) {
            return preferences.getString(key, (String) defaultObject);
        } else if (defaultObject instanceof Integer) {
            return preferences.getInt(key, (Integer) defaultObject);
        } else if (defaultObject instanceof Boolean) {
            return preferences.getBoolean(key, (Boolean) defaultObject);
        } else if (defaultObject instanceof Float) {
            return preferences.getFloat(key, (Float) defaultObject);
        } else if (defaultObject instanceof Long) {
            return preferences.getLong(key, (Long) defaultObject);
        }

        return null;
    }

    /**
     * 保存List
     *
     * @param tag
     * @param datalist
     */
    public <T> void setDataList(String tag, List<T> datalist) {
        if (null == datalist || datalist.size() <= 0)
            return;
        Gson gson = new Gson();
        //转换成json数据，再保存
        String strJson = gson.toJson(datalist);
        editor.clear();
        editor.putString(tag, strJson);
        editor.commit();

    }

    /**
     * 获取List
     *
     * @param tag
     * @return
     */
    public <T> List<T> getDataList(String tag) {
        List<T> datalist = new ArrayList<T>();
        String strJson = preferences.getString(tag, null);
        if (null == strJson) {
            return datalist;
        }
        Gson gson = new Gson();
        datalist = gson.fromJson(strJson, new TypeToken<List<T>>() {
        }.getType());
        return datalist;

    }

    /**
     * 获取List
     *
     * @param tag
     * @param clazz
     * @param <T>
     * @return
     */
    public <T> List<T> getDataList(String tag, Class<T> clazz) {
        List<T> datalist = new ArrayList<T>();
        String strJson = preferences.getString(tag, null);
        if (null == strJson) {
            return datalist;
        }
        Gson gson = new Gson();
        Type type = new ParameterizedTypeImpl(List.class, new Class[]{clazz});
        datalist = gson.fromJson(strJson, type);
        return datalist;

    }

    /**
     * 移除某个key值已经对应的值
     *
     * @param context
     * @param key
     */
    public static void remove(Context context, String key) {
        editor.remove(key);
        SharedPreferencesCompat.apply(editor);
    }

    /**
     * 清除所有数据
     *
     * @param context
     */
    public static void clear(Context context) {
        editor.clear();
        SharedPreferencesCompat.apply(editor);
    }

    /**
     * 查询某个key是否已经存在
     *
     * @param context
     * @param key
     * @return
     */
    public static boolean contains(Context context, String key) {
        return preferences.contains(key);
    }

    /**
     * 返回所有的键值对
     *
     * @param context
     * @return
     */
    public static Map<String, ?> getAll(Context context) {
        return preferences.getAll();
    }

    /**
     * 创建一个解决SharedPreferencesCompat.apply方法的一个兼容类
     *
     * @author zyb
     */
    private static class SharedPreferencesCompat {
        private static final Method sApplyMethod = findApplyMethod();

        /**
         * 反射查找apply的方法
         *
         * @return
         */
        @SuppressWarnings({"unchecked", "rawtypes"})
        private static Method findApplyMethod() {
            try {
                Class clz = SharedPreferences.Editor.class;
                return clz.getMethod("apply");
            } catch (NoSuchMethodException e) {
            }

            return null;
        }

        /**
         * 如果找到则使用apply执行，否则使用commit
         *
         * @param editor
         */
        public static void apply(SharedPreferences.Editor editor) {
            try {
                if (sApplyMethod != null) {
                    sApplyMethod.invoke(editor);
                    return;
                }
            } catch (IllegalArgumentException e) {
            } catch (IllegalAccessException e) {
            } catch (InvocationTargetException e) {
            }
            editor.commit();
        }
    }

    class ParameterizedTypeImpl implements ParameterizedType {
        private final Class raw;
        private final Type[] args;

        public ParameterizedTypeImpl(Class raw, Type[] args) {
            this.raw = raw;
            this.args = args != null ? args : new Type[0];
        }

        @Override
        public Type[] getActualTypeArguments() {
            return args;
        }

        @Override
        public Type getRawType() {
            return raw;
        }

        @Override
        public Type getOwnerType() {
            return null;
        }
    }

}

标签：return,SPUtils.18604360,param,editor,key,public,String
From： https://www.cnblogs.com/zybao/p/18604362