package com.hdl.photovoltaic;
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import android.app.Application;
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import java.util.HashMap;
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import java.util.Objects;
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public class HDLApp extends Application {
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//声明一个当前应用的实例
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private static HDLApp mHDLApp;
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//声明一个公共的信息映射,可当作全局变量使用;
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public HashMap<String, String> mInfoMap = new HashMap<>();
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//利用单例模式获取当前应用的唯一实例
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public static HDLApp getInstance() {
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return mHDLApp;
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}
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@Override
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public void onCreate() {
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super.onCreate();
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mHDLApp = this;
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}
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public void setInfoMap(String key, String value) {
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mInfoMap.put(key, value);
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}
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public String getValue(String key) {
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if (mInfoMap.containsKey(key)) {
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return mInfoMap.get(key);
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}
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return "";
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}
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public String getKey(String value) {
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if (mInfoMap.containsValue(value)) {
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for (String key : mInfoMap.keySet()) {
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if (Objects.equals(mInfoMap.get(key), value)) {
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return key;
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}
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}
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}
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return "";
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}
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}
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