Programmer Think

WiFi hotspot Android Development What is WiFi Wi Fi is a family of wireless network protocols, which is based on IEEE 802.11 protocol. Wi Fi works seamlessly with its wired sister Ethernet. Conditional devices can be interconnected through wireless access points, including wired devices and the Internet. Based on different IEEE 802.11 protoco ...

🚪 1. Fragment report Gradle Gradle - Module: def fragment_version = "1.3.1" implementation "androidx.fragment:fragment-ktx:$fragment_version" debugImplementation "androidx.fragment:fragment-testing:$fragment_version" 😓: You see, this is not Android test or test, but debug. We don't have it! 🤗: haven't you? You have to mak ...

The official has also changed this knowledge point twice Bitmap can be said to be the most common memory consumer in Android. Many oom problems we encounter in the development process are caused by it. Google officials have also been iterating over its pixel memory management strategy. From Android 2.3.3 to 2.3-7.1 on the java heap, and back t ...

Graphviz draw linked list Writing purpose Originally, I wanted to be lazy. For the drawing of linked list, I wanted to draw it on A4 paper, then take a photo as electronic data, and then store it. However, considering my font "catch chicken", I didn't want to save it in the photo album or upload the photo to a hardware medium for st ...

1. Preface I finally don't need to debug a hardware device and install an APP. If I download someone else's network debugging assistant in the APP store and have advertisements, I might as well write a relatively complete network debugging assistant directly. At present, the supported functions include tcp client and server, udp, low-power Blu ...

Ramble Yesterday, I happened to encounter a small problem with enumeration, and then found that I am not so familiar with it. Then in development, enumeration is used very much, so I have today's article. What is enumeration Enumeration in Java is a type, just as the name suggests: it is enumerated one by one. Therefore, it generally represe ...

1. Customize the classification of View 1. Inherit View and override onDraw method It is mainly used to realize some irregular effects. This effect is not convenient to be achieved by layout combination. It usually needs to display some irregular graphics statically or dynamically, draw them, and support wrap_content, and supports padding. 2. ...

Handler parsing in Android Understanding Handler 1. What is a Handler Handler is a very important component of android messaging processing mechanism. It is often used by working threads to update UI threads and deliver messages, so as to realize the communication between threads. 2. Why use Handle Multithreading is often involved in our ...

Androidx-Lifecycle has recently moved to version 2.5.0, one of the most important changes being the introduction of the concept of CreatioinExtras. One sentence summarizing the role of CreationExtras: helps us gracefully get initialized parameters when creating ViewModel s 1. Status Quo Review how ViewModel s have been created so far val v ...

  catalogue Use of Handler Handler initialization send message Processing messages Blocking and wakeup of MessageQueue block awaken The inspiration of Handler to our developers Highlight 1 Highlight 2 When will Looper be launched Handler common interview questions preface For a developer, reading source code is a required ...