Java tutorial
//package com.java2s; import android.content.Context; import android.content.SharedPreferences; import android.content.pm.PackageInfo; import android.content.pm.PackageManager; public class Main { private static final String CONFIG_NAME = "update_config"; private static final String APP_ACTIVE_TIME = "app_active_time"; private static final String APP_LAST_VERSION = "app_last_version"; private static final String APP_IS_UPDATE = "app_is_update"; public static void updateConfig(Context context) { SharedPreferences sp = getSP(context); SharedPreferences.Editor editor = sp.edit(); PackageManager pm = context.getPackageManager(); if (!sp.contains(APP_ACTIVE_TIME)) { editor.putLong(APP_ACTIVE_TIME, System.currentTimeMillis()); editor.putBoolean(APP_IS_UPDATE, false); } else { editor.putBoolean(APP_IS_UPDATE, true); } try { PackageInfo info = pm.getPackageInfo(context.getPackageName(), 0); String versionName = info.versionName; editor.putString(APP_LAST_VERSION, versionName); } catch (PackageManager.NameNotFoundException e) { } editor.apply(); } private static SharedPreferences getSP(Context context) { return context.getSharedPreferences(CONFIG_NAME, Context.MODE_PRIVATE); } }