Introduction to some API s of Android ActivityManager
Many API s are encapsulated in the ActivityManager class of the Java layer in Android, which allows us to query a lot of information about the current system, including memory, process, task, service and so on.
Using this information, you can make some useful judgments, such as whether the current system memory is insufficient and wheth ...
Posted by davo666 on Fri, 20 May 2022 04:11:27 +0300
The first line of code - Second Edition - after viewing
Chapter 1 Introduction to Android
as is based on idea. No wonder it's so similar
proguard-rules.pro is a file that specifies the confusion rules of the project code (confusion is that the project is typed into an installation package and does not want to be cracked, so as to confuse and make it difficult for the cracker to read)
gradle is base ...
Posted by dpacmittal on Thu, 19 May 2022 14:19:03 +0300
Realize the weather forecast App by hand -- switch the city to manual update + automatic refresh of background service
Manual update and background service automatic refresh and switch cities
Update weather manually
It is realized by pull-down refresh
<androidx.swiperefreshlayout.widget.SwipeRefreshLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="@+id/swipe_refresh">
<ScrollView
andro ...
Posted by bradleybebad on Thu, 19 May 2022 13:49:32 +0300
Android Bluetooth protocol stack message (bta_sys_sendmsg) sending mechanism -- unique resolution of the whole network
Android Bluetooth pairing connection source code analysis document, very detailed from btif BTA BTM HCI data flow to, and from control - click to download
When reading the code, the first problem encountered by students who began to study the Bluetooth protocol stack is that when they encounter sending events, they can't track the code. Then t ...
Posted by zimick on Thu, 19 May 2022 03:36:28 +0300
Standardize code naming to make your Dart code more pleasant to read
Click here to learn about the "Flutter Introduction and Combat" column, continuous update and systematic learning!
foreword
Good coding style is very important. Keeping consistent naming can make the code reading experience better and team collaboration more efficient. This article introduces the officially recommended naming conven ...
Posted by MBrody on Thu, 19 May 2022 02:17:31 +0300
FFmpeg development (04): FFmpeg + OpenGLES realize audio visual playback
This article was first published on wechat official account: byte flow
Serial of FFmpeg Development Series:FFmpeg development (01): FFmpeg compilation and integrationFFmpeg development (02): FFmpeg + ANativeWindow to realize video decoding and playbackFFmpeg development (03): FFmpeg + OpenSLES realize audio decoding and playback
This paper real ...
Posted by kool_samule on Wed, 18 May 2022 12:00:05 +0300
FFmpeg development (01): FFmpeg compilation and integration
The original article was first published on wechat official account: byte flow
Why learn FFmpeg development
FFmpeg is a well-known open source audio and video processing software. It provides rich and friendly interfaces to support developers' secondary development.
FFmpeg reads "ef ef em peg", where "FF" refers to "Fa ...
Posted by chrisg101 on Wed, 18 May 2022 05:38:19 +0300
Influence of initialization timing of virtualapk plug-in framework on starting plug-in Activity
Problem background
It is stated in the virtualapk framework document that initialization needs to be carried out in the onCreate method in the Application. It is no problem to use it according to the steps in the document. It is also possible to start the plug-in Activity from the host Due to business needs, the use of virtualApk in the projec ...
Posted by Sianide on Tue, 17 May 2022 18:11:09 +0300
Fluent asynchronous programming - event loop, Isolate, Stream
Event loop, Isolate
Before we start, we need to understand that Dart is single threaded and that fluent depends on Dart
If you know event loop in js The whole process of asynchronous dart is well understood
Let's look at a piece of code first
import 'dart:async';
Future eventLoop() async{
print('A');
Future((){
print('F');
scheduleMicrota ...
Posted by WinterDragon on Mon, 16 May 2022 23:21:38 +0300
Another Android open source masterpiece released! New video animation special effects SDK: efficient, stable and reliable, low maintenance cost
Not long ago, the technical team of byte beating opened a video animation special effects SDK on Github, which can realize the mixing of Alpha channel and RGB channel on the client through OpenGL ES by making video materials separated from Alpha channel, so as to play video with transparent channel on the client.
This scheme significantly redu ...
Posted by Pryach on Mon, 16 May 2022 21:31:56 +0300