SharedPreferences 帮助类

存数据

 Pref_Utils.putString(this, "phone","123456789");

取数据

 String phone = Pref_Utils.getString(this, "phone");

源码

package com.gstb.ylm.xwutils;

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

/*
SharedPreferences的工具类
 */
public final class Pref_Utils {


    public static final String PREFERENCE_NAME = "XX";


    public static boolean putString(Context context, String key, String value) {
        //获取shareprefrence对象
        SharedPreferences settings = context.getSharedPreferences(PREFERENCE_NAME, Context.MODE_PRIVATE);
        //获取shareprefrence的编辑器对象
        SharedPreferences.Editor editor = settings.edit();
        //通过编辑器对象往里面放入value
        editor.putString(key, value);
        return editor.commit();
    }


    public static String getString(Context context, String key) {
        return getString(context, key, null);
    }


    public static String getString(Context context, String key, String defaultValue) {
        SharedPreferences settings = context.getSharedPreferences(PREFERENCE_NAME, Context.MODE_PRIVATE);
        return settings.getString(key, defaultValue);
    }

    public static boolean putInt(Context context, String key, int value) {
        SharedPreferences settings = context.getSharedPreferences(PREFERENCE_NAME, Context.MODE_PRIVATE);
        SharedPreferences.Editor editor = settings.edit();
        editor.putInt(key, value);
        return editor.commit();
    }


    public static int getInt(Context context, String key) {
        return getInt(context, key, -1);
    }


    public static int getInt(Context context, String key, int defaultValue) {
        SharedPreferences settings = context.getSharedPreferences(PREFERENCE_NAME, Context.MODE_PRIVATE);
        return settings.getInt(key, defaultValue);
    }

    public static boolean putLong(Context context, String key, long value) {
        SharedPreferences settings = context.getSharedPreferences(PREFERENCE_NAME, Context.MODE_PRIVATE);
        SharedPreferences.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 CourseIntroduceBean preference with this
     * name that is not CourseIntroduceBean 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 return if this preference does not exist
     * @return The preference value if it exists, or defValue. Throws ClassCastException if there is CourseIntroduceBean preference with
     * this name that is not CourseIntroduceBean long
     */
    public static long getLong(Context context, String key, long defaultValue) {
        SharedPreferences settings = context.getSharedPreferences(PREFERENCE_NAME, Context.MODE_PRIVATE);
        return settings.getLong(key, 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);
        SharedPreferences.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 CourseIntroduceBean preference with this
     * name that is not CourseIntroduceBean float
     * @see #getFloat(Context, String, float)
     */
    public static float getFloat(Context context, String key) {
        return getFloat(context, key, -1);
    }

    /**
     * get float preferences
     *
     * @param context
     * @param key          The name of the preference to retrieve
     * @param defaultValue Value to return if this preference does not exist
     * @return The preference value if it exists, or defValue. Throws ClassCastException if there is CourseIntroduceBean preference with
     * this name that is not CourseIntroduceBean float
     */
    public static float getFloat(Context context, String key, float defaultValue) {
        SharedPreferences settings = context.getSharedPreferences(PREFERENCE_NAME, Context.MODE_PRIVATE);
        return settings.getFloat(key, defaultValue);
    }

    /**
     * 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);
        SharedPreferences.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 CourseIntroduceBean preference with this
     * name that is not CourseIntroduceBean boolean
     * @see #getBoolean(Context, String, boolean)
     */
    public static boolean getBoolean(Context context, String key) {
        return getBoolean(context, key, false);
    }

    public static boolean getDefaultBoolean(Context context, String key) {
        return getBoolean(context, key, true);
    }

    /**
     * get boolean preferences
     *
     * @param context
     * @param key          The name of the preference to retrieve
     * @param defaultValue Value to return if this preference does not exist
     * @return The preference value if it exists, or defValue. Throws ClassCastException if there is CourseIntroduceBean preference with
     * this name that is not CourseIntroduceBean 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);
    }

    /**
     * 清空全部的数据
     */
    public static void cleanAllData(Context context) {
        SharedPreferences settings = context.getSharedPreferences(PREFERENCE_NAME, Context.MODE_PRIVATE);
        SharedPreferences.Editor editor = settings.edit();
        editor.clear();
        editor.commit();
    }
}