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3. With local version For information comparison, select whether to display the update pop-up window. We use event\_bus trigger if (localVersion == remoteVersion) return;eventManager.eventBus.fire(new UpdateAppEvent(versionInfo)); 4. When upgrading the version, pay attention to the difference Android And IOS (1) IOS to update app ...

(4)singleInstance: an Activity stack will be created separately; 8. Optimization of program lock Put the variables created every time in the while loop outside the loop and create them only once //Before modification while(flag){ List<RunningTaskInfo> infos = am.getRunningTasks(1000); String packname = infos.get(0).topAct ...

There is a very simple requirement: write an HTTP interface, send a JSON string by POST, read the sent parameters in the interface, process one of the parameters, and return. If we use Flask to develop this interface, the code is as follows: from flask import Flask, request app = Flask(__name__) @app.route('/insert', methods=['POST']) def ...

Problem Description: when ObjectOutputStream serializes and writes objects to a file by appending, it only wants to append objects to the end of the file each time instead of overwriting them. You can use fileoutputstream (file name, true) as a constructor parameter and write objects with the writeObject() method. ObjectInputStream ois = new O ...

Master advanced matching operation Regular expressions are really fun. In the last article, you should master some basic operations. Presumably, you should master them well. Then this article will take you to master some advanced operations. Introducing metacharacters Regular expression language consists of two basic character types: lite ...

prefaceView can be said to be a role used every day in daily development. Although view does not belong to the four components, its role and importance can not be underestimated. This type of article is intended to write a series to provide a way for self review or novice learning.View BasicsThis article mainly introduces some basic knowledge o ...

I. diagram sequence table Concept of sequence table Sequential table is a linear structure in which data elements are stored in sequence with a storage unit with continuous physical addresses. Generally, array storage is used. Complete the addition, deletion, query and modification of data on the array. (what we want to describe below is a dy ...

Corresponding key and value in Map: "Dagu", "diga Altman" "Mountain", "Gaia Altman" "Li Xiangyang", "emperor Xia" 4. Objects to create the Map collection: Polymorphic way The specific implementation classes are HashMap, HashTable, ConcurrentHashMa ...

preface       Today, I went to work happily, because I made a lot of money from the stocks I bought, so I was happy! There must be no state at work that day. My mind is on the stock! A few random increases are a month's salary, which must be more fragrant. So today, I paid special attention to the stock price information. I watc ...

Talent Nini Fox's 21 day habit display day 8 In order to facilitate the inspectors to read, the page was rearranged, and the topics were arranged in descending chronological order. Today, I don't have enough time to write casually (old mixed characters) 1, Learning Planning 1. Computer composition atlas drawing (should be knowledg ...