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The onError method of Rxjava locates the NULL pointer details, rxjavaonerrorThe onError method of Rxjava locates a null pointer. Recently, we have been using kotlin + Rxjava to write projects. A null pointer is encountered (the null is located

Virtual apk plug-in Architecture Analysis, virtualapk The basic principle is to hook the system's activity service and other key components. When you need to start some components in the plug-in and use the custom logic, when you start the

Android has three basic components: Activity, Service, and BroadcastReceiver. They are all started with Intent. This article describes the lifecycle of an Activity and its Intent usage. In the previous example, Activity is always used. When a Layout

Cold wind Since the SOCKET is used to connect the computer on the network, there are two parts: First, the Client on Android Second, the Server on the PC The implementation code above Android is as follows: Package Hello. MySocket;Import java. io.

This article mainly introduces the MaterialDesign-input component of the mini-program, which has some reference value. if you are interested, you can refer to it. This article mainly introduces the MaterialDesign-input component of the mini-program,

VaR dragdom = Document. queryselector (". fordrop "),Dropdom = Document. queryselector (". fordrop "); W. addhandler (dragdom, "dragstart", function (e ){E. datatransfer. setdata ("text", "Hello Zodiac ");W. Log ("dragstart ");});W. addhandler

Recently, DBConnectionManager connection pool has been used for various reasons. Unfortunately, no example can be found for the entire internet. The following is a complete example of callable and usable. The file sequence is as

Process arbitrary XML files The custom xml file is placed under res/xml/. You can use R. xml. file_name to obtain an XMLResourceParser object. The following is an example of an xml file: . This experiment uses parameters as an example. -->

Dragdrop seems simple, but it is not easy to implement. HTML5 provides events to support dragdrop. With these events, you can easily implement dragdrop. Some friends are not familiar with the dragdrop of HTML5. Here we will first introduce the

Blog migration-I have migrated my blog to www.ijavaboy.com to better manage it. We are sorry for the inconvenience caused by no updates! New address of this article: Click me  With the previous work, the desktop is basically ready to use, but it is

Android image processing artifact BitmapFun source code analysis     As an Android developer, I believe everyone is familiar with the problem of image OOM. There are many open-source projects on image caching and OOM solutions, the well-known ones

Android learning notes-ButterKnife 8.0 annotation usage introduction, androidbutterknifePreface: Most App project development is based on UI pages. At this time, we need to call a large number of findViewById and setOnClickListener codes. When there

[Open-Source project] TVRemoteIME interface for control applications of Smart TVs and TV boxes,1. APP project introduction: APP name:TVRemoteIME Function Description:Android smart TV or android box control applications can be remotely input and

Android data storage,   When the app is running, you need to save some user information. For example, the logon status and account information. Android provides multiple methods to store user data.   1. key-value storage, implemented through

Code for versions earlier than 3.0:Java codePrivate void setWifiProxyConfiguration (ProxyConfiguration proxyconfiguration ){// If isnot SSID, return outIf (proxyconfiguration. getProxyScope ()! = ProxyConfiguration. ProxyScope. SSID

Android obtains local album images and photos to obtain images, Requirements:Find an image from a local album or call the System camera to take a photo. Errors: 1. When we specify the uri path of the photo, we cannot use data. getData (); to get the

Android callback function During android development, we often encounter some callback functions. Among them, our most common callback is that when we set a listener for a component, in fact, it is relative to the set callback function. For example:

Engaged in Android development, it is inevitable that some advertisement sdks will be embedded in the application. After many sdks are embedded, almost every requirement is found in AndroidManifest. the xml declarative Activity advertisement SDK

Recently, I am working on an image upload function. I need to provide the path for uploading images to the SD card. I have read some examples on the Internet. The code is very simple after debugging. The layout file is as follows: Copy codeThe Code

The applet obtains the mobile phone number Authorization User Login function, and the applet User Login There are many areas in the applet that use the registered user information. You need to enter the mobile phone number and so on. With this