Programmer Group

https://duanqz.github.io/2015-10-12-ANR-Analysis 1. Overview ANR(Application Not Responding) is a simple definition, but it covers many design ideas of Android system. Firstly, ANR belongs to the category of application, which is different from SNR (system not responding). The problem reflected by SNR is that the system_server has lost its re ...

prefaceIn the previous article, we introduced the basic knowledge of View and the implementation of View sliding. This article will bring you a core knowledge point of View, event distribution mechanism. Event distribution mechanism is not only a core knowledge point, but also a difficulty in Android. Let's analyze the transmission of events fr ...

1, OverviewHandler is the mechanism for handling asynchronous messages in Android. To sum up, Looper, handler, MessageQueue and Message are: Looper is responsible for creating a MessageQueue, then entering an infinite loop body, constantly reading messages from the MessageQueue, and then calling back the corresponding Message processing functio ...

1, Lifecycle Lifecycle is a lifecycle aware component in Jetpack. It is used to store information about the lifecycle state of an Activity or Fragment, and allow other objects to observe this state. Lifecycle uses state and event enumerations to track the lifecycle state of its associated components. 2, Basic use   Using Lifecycle to o ...

catalogue 1. Overview 2. Main tasks 3. Main content 4. PowerWorld simulation (1) Normal operation   (2) Load increase (3) Increase of generator output   5. MATLAB programming example (1) Flow chart of power flow calculation program (2) Program code of power flow calculation   6. Data acquisition (Baidu online disk) 1 ...

Engineering dependency com.android.dialer is the main project and depends on com.android.contacts.common project and com.android.phone.common project com.android.contacts.common depends on com.android.phone.common project and com.android.common project In addition, some support packages are also introduced as link projects. The above codes ...

Author: byte hopping terminal technology -- Lin Xuebin 1, Background Since we often have button scenarios in business development, we require that the description text in the UI should be vertically centered as much as possible. However, in the process of development, we often encounter the problem that the text is not vertically centered as ...

Author: Wu ZhiweiIn the past two years, Flutter technology has been used more or less in both innovative applications and old flagship applications. However, the most common problem reported by the Flutter business team is that the memory consumption of Flutter is too high.The reasons for the high memory usage of the Flutter are complex, so it ...

Why use AsyncTaskWe all write apps on the principle that the main thread cannot run tasks that require a lot of CPU time slices, such as a large number of complex floating-point operations, large disk IO operations, network socket s, etc., which will lead to slow response of our main thread to users and even ANR, which will deteriorate the user ...

Kotlin 1.5 announced a blockbuster feature   value class, which is a very practical feature to improve code readability and performance, because the compiler will further optimize it and reduce the creation of objects. With the continuous improvement of Kotlin, a series of features have emerged   inner class  ,  data class ...