200 lines
6.5 KiB
Java
200 lines
6.5 KiB
Java
package com.info.sn.utils;
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import android.content.Context;
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import android.content.SharedPreferences;
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import android.graphics.Bitmap;
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import android.graphics.BitmapFactory;
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import android.graphics.drawable.BitmapDrawable;
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import android.util.Base64;
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import android.widget.ImageView;
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import java.io.ByteArrayInputStream;
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import java.io.ByteArrayOutputStream;
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import java.lang.reflect.InvocationTargetException;
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import java.lang.reflect.Method;
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import java.util.Map;
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/**
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* 作者 mjsheng
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* 日期 2018/10/9 18:41
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* 邮箱 501802639@qq.com
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* 来自:
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*/
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public class SPUtils {
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/**
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* 保存在手机里面的文件名
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*/
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public static final String FILE_NAME = "share_data";
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/**
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* 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
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*/
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public static void put(Context context, String key, Object object) {
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SharedPreferences sp = context.getSharedPreferences(FILE_NAME,
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Context.MODE_PRIVATE);
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SharedPreferences.Editor editor = sp.edit();
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if (object instanceof String) {
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editor.putString(key, (String) object);
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} else if (object instanceof Integer) {
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editor.putInt(key, (Integer) object);
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} else if (object instanceof Boolean) {
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editor.putBoolean(key, (Boolean) object);
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} else if (object instanceof Float) {
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editor.putFloat(key, (Float) object);
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} else if (object instanceof Long) {
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editor.putLong(key, (Long) object);
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} else {
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editor.putString(key, object.toString());
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}
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SharedPreferencesCompat.apply(editor);
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}
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/**
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* 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
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*/
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public static Object get(Context context, String key, Object defaultObject) {
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SharedPreferences sp = context.getSharedPreferences(FILE_NAME,
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Context.MODE_PRIVATE);
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if (defaultObject instanceof String) {
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return sp.getString(key, (String) defaultObject);
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} else if (defaultObject instanceof Integer) {
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return sp.getInt(key, (Integer) defaultObject);
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} else if (defaultObject instanceof Boolean) {
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return sp.getBoolean(key, (Boolean) defaultObject);
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} else if (defaultObject instanceof Float) {
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return sp.getFloat(key, (Float) defaultObject);
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} else if (defaultObject instanceof Long) {
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return sp.getLong(key, (Long) defaultObject);
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}
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return null;
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}
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/**
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* 移除某个key值已经对应的值
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*/
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public static void remove(Context context, String key) {
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SharedPreferences sp = context.getSharedPreferences(FILE_NAME,
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Context.MODE_PRIVATE);
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SharedPreferences.Editor editor = sp.edit();
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editor.remove(key);
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SharedPreferencesCompat.apply(editor);
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}
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// /**
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// * 清除所有数据
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// */
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// public static void clear(Context context) {
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// SharedPreferences sp = context.getSharedPreferences(FILE_NAME,
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// Context.MODE_PRIVATE);
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// SharedPreferences.Editor editor = sp.edit();
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// editor.clear();
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// SharedPreferencesCompat.apply(editor);
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// reductFirstEnter(context);
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// }
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// //还原状态firstEnter信息
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// private static void reductFirstEnter(Context context){
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// put(context, CommonDatas.FLAG_FIRST_ENTER,CommonDatas.FLAG_FIRST_ENTER);
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// }
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/**
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* 查询某个key是否已经存在
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*/
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public static boolean contains(Context context, String key) {
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SharedPreferences sp = context.getSharedPreferences(FILE_NAME,
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Context.MODE_PRIVATE);
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return sp.contains(key);
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}
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/**
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* 返回所有的键值对
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*/
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public static Map<String, ?> getAll(Context context) {
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SharedPreferences sp = context.getSharedPreferences(FILE_NAME,
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Context.MODE_PRIVATE);
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return sp.getAll();
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}
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/**
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* 保存图片到SharedPreferences
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*
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* @param mContext
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* @param imageView
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*/
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public static void putImage(Context mContext, String key, ImageView imageView) {
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BitmapDrawable drawable = (BitmapDrawable) imageView.getDrawable();
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Bitmap bitmap = drawable.getBitmap();
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// 将Bitmap压缩成字节数组输出流
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ByteArrayOutputStream byStream = new ByteArrayOutputStream();
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bitmap.compress(Bitmap.CompressFormat.PNG, 80, byStream);
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// 利用Base64将我们的字节数组输出流转换成String
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byte[] byteArray = byStream.toByteArray();
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String imgString = new String(Base64.encodeToString(byteArray, Base64.DEFAULT));
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// 将String保存shareUtils
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SPUtils.put(mContext, key, imgString);
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}
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/**
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* 从SharedPreferences读取图片
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*
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* @param mContext
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* @param imageView
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*/
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public static Bitmap getImage(Context mContext, String key, ImageView imageView) {
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String imgString = (String) SPUtils.get(mContext, key, "");
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if (!imgString.equals("")) {
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// 利用Base64将我们string转换
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byte[] byteArray = Base64.decode(imgString, Base64.DEFAULT);
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ByteArrayInputStream byStream = new ByteArrayInputStream(byteArray);
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// 生成bitmap
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return BitmapFactory.decodeStream(byStream);
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}
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return null;
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}
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/**
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* 创建一个解决SharedPreferencesCompat.apply方法的一个兼容类
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*/
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private static class SharedPreferencesCompat {
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private static final Method sApplyMethod = findApplyMethod();
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/**
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* 反射查找apply的方法
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*/
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@SuppressWarnings({"unchecked", "rawtypes"})
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private static Method findApplyMethod() {
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try {
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Class clz = SharedPreferences.Editor.class;
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return clz.getMethod("apply");
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} catch (NoSuchMethodException e) {
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}
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return null;
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}
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/**
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* 如果找到则使用apply执行,否则使用commit
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*/
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public static void apply(SharedPreferences.Editor editor) {
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try {
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if (sApplyMethod != null) {
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sApplyMethod.invoke(editor);
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return;
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}
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} catch (IllegalArgumentException e) {
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} catch (IllegalAccessException e) {
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} catch (InvocationTargetException e) {
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}
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editor.commit();
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}
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}
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}
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