Programmer Group

Based on Android 11-api30 Overview Obtain two binders, applicationThread and AMS 2. During attach, the obtained applicationThread object is also passed to the AMS process, requesting a remote call to inform the AMS Application process that it wants to create an Application. At this time, AMS is the serverAMS receives a message and requests to ...

🔥 concept 💥 process The basic unit of program operation. The basic unit of system resource allocation and scheduling. Has its own independent address space. Multiple processes can execute concurrently. Thread container 💥 thread The smallest unit of program execution. The basic unit of CPU scheduling and dispatch. There is ...

1, Background In product requirements, we often count the exposure requirements of each item of recyclerView: The recyclerView scrolls up and down each item from invisible to the visible range of the screen (this includes the visible range of the item and the exposure duration of the item) During tab switching or page switching, it will cause ...

2021SC@SDUSC In the first blog post, I learned the basic ways to use Android Studio. The second part mainly uses part of the first week and all the time of the second week to learn the grammar needed for Android development, through which you can finally understand part of the code. Here are some points of knowledge that you summarized from the ...

Today, with the long tassel in hand, when will the dragon be bound Qingpingle Liupanshan preface This article continues to summarize the controls commonly used in Android, which is a further supplement to the previous common sense and basic articles, including image view, list view, dialog box, page turning view, video view, surface ...

1, Title: design an APP. 1. Design an APP. (1) There are two interfaces in the APP. (2) There are two buttons "login" and "broadcast" on the main activity. Click the "login" button to open a new activity. Click the "broadcast" button to send a broadcast message. (3) On the new activity interface, you can ...

0. Introduction         The underlying kernel of Android is built based on Linux, which is in the Native world, while the upper application of Android belongs to the Java world. So how did the system hatch the Java world from Native during the startup of the Android system? This is the main responsibility of Zygote, the pr ...

####What is IntentService? IntentService inherits from Service, so IntentService is also one of the four major components. IntentService encapsulates the HandlerThread thread thread (only one thread) to process asynchronous tasks in sequence. Start IntentService through startService(Intent) and transmit asynchronous tasks through Intent. When ...

The effect achieved by ObjectAimator in Demo can also be achieved by using a View. Problems to be solved to implement this custom View: Override onMeasure to calculate its own sizeText drawingThe picture is loaded and displayed as a circle Optimization involved in image loading (such as size and cache)Animation effect The message appear ...

Volume adjustment is divided into three parts: master volume (hardware volume, control sound card), stream volume (stream volume) and track volume(app volume). app volume formula: app_mix = master_volume * stream_volume * track_volume; Where master_volume，stream_volume and track_volume is a percentage, and 1 indicates that the volume is adju ...