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Key points of text objectives Recently, I saw a motion effect of dome meteor from KuWo Music App. After reading it, I decided to try it myself. This article will focus on realizing the meteor shower effect through custom View, and you can see the advanced motion effect of meteor shower around the album picture. By completing this development, ...

Living status We know that the Android system will kill the background process, and with the update of the system version, the intensity of killing the process is still increasing. The starting point of the system itself is good, because it can save memory, reduce power consumption and avoid some rogue behavior. However, for some applications ...

one   Problem description During a call, the screen is on because the distance sensor is not completely covered, and the status bar is pulled down due to touching the status bar near the ear after the screen is on There are two ways to pull down the status bar: one is to drag the status bar, the other is to click the status bar twice i ...

preface Why did you play Toast to prompt that the download was successful without the network (on flight mode)? Subconsciously, the Toast prompt must be playing early. Just click the button and play Toast before downloading. Hurry to get your mobile phone to operate and verify it. There's really no network. After playing the download complet ...

Compiling ORBSLAM-2 in ROS environment ROS installation (Ubuntu 18.04) ROS environment ready for installation Construction of ORB-SLAM2 algorithm environment Create ROS workspace: mkdir -p ~/catkin_ws/src cd ~/catkin_ws/ catkin_make mkdir ORB-SLAM2 Add environment variable: echo "source ~/catkin_ws/devel/setup.bash" >> ~/ ...

LiveData introduction LivaData is a observable data container class. Specifically, LiveData can be understood as a data container, which packages the data and makes the data become an observer. When the data changes, the observer can be notified. Unlike regular observable classes, LiveData can perceive the life cycle of activities, fragments, ...

During the Mid Autumn Festival holiday, I wanted to have a good rest. My girlfriend said that the Tencent classroom courses downloaded from my mobile phone could be transferred to the computer because there was not enough space on my mobile phone. I thought it was not very simple.. Sure enough, it was not as simple as I thought. I found the vid ...

1, Simple dialing Dialer Interface: Dial up with intent to realize the code: At this time, dialing error occurred: Because you don't have permission, you can't dial, so you need to get permission first. First set permissions in the configuration file: <uses-permission android:name="android.permission.CALL_PHONE"/> ...

1. Bridge between view and data model When the function of the page (Activity/Fragment) is relatively simple, we usually write all the business logic related to UI interaction and data acquisition in the page. However, in the case of complex page functions, the amount of code will change very much, which also violates the "single function ...

When reading the Android drawing source code, many articles analyzed that the execution of drawing message must take precedence over all messages. This is based on the principle of Handler's synchronous barrier mechanism and asynchronous message, but these mechanisms are not open to developers, and the relevant methods are also marked @ hide. ...