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1, Foreword Tiktok volcano volcano volcano is a small video. It is understood that the volcanic video has been upgraded to the tiktok version. It is necessary to upgrade its security measures. The author studied the equipment registration method of the flare volcano version, which is to generate device_. Tiktok can make nothing of it. It is pos ...

Four components - Content Provider Details @author worry-free teenager @createTime 2021/08/15 1. Introduction to Content Providers Content Provider is mainly used to share data between different applications. It provides a complete mechanism to allow one program to access data in another program while also ensuring the security of the ...

1, Foreword Although ViewModel has helped us deal with the data retention problem caused by page destruction and reconstruction caused by screen rotation, the data is not saved for page destruction and reconstruction caused by insufficient memory. This article mainly makes a unified improvement and arrangement according to the official doc ...

catalogue 1, Air safety 1.1 null pointer 1.2 nullability (?) 1.3 safe call operator (?.) 1.4 let operator 1.5 use non null assertion operator (!!!.) 1.6 use the empty merge operator (?:) 1.7 using the type conversion operator (as) 1.7. 1 unsafe conversion operator: as 1.7. 8. Safe conversion operator: as? 2, Abnormal 2.1 concept 2. ...

1, Environment constructionFirst, developers need to build a good development environment according to the construction process of native Android and iOS. Then, go Flutter official website Download the latest SDK, and then unzip it to the user-defined directory. If there is a download problem, you can use the temporary image officially built by ...

summary The source code of rxjava simple subscribe has been mentioned earlier. Interested readers can have a look. Rxjava source code analysis (I) - subscribe source code Based on the previous analysis, this article will continue to talk about rxjava interrupt thread switching. Demo The main logic is as follows: Observable calls create() t ...

This paper aims to describe the Framework of the Framework, mainly to record my learning about android framework for a period of time, hoping to attract jade and help readers.prefaceWrite before: 1. Is it necessary to learn linux kernel? I think it is necessary. Learning linux kernel helps us to deepen our understanding of some concepts, such ...

1，Activity1.1 life cycleNormally, an Activity will go through the following stages:onCreate: indicates that the Activity is being created.onRestart: indicates that the Activity is being restarted.onStart: indicates that the Activity is being started. It is already visible at this time, but it does not appear in the foreground and cannot intera ...

In the previous section, we talked about LinearLayout, which is also the first layout you learned. It supports multiple views in a linear manner (horizontal or vertical) combination. The most practical one is the weight attribute. Using weight well can make your linear layout more flexible and beautiful. However, in the example in the previous ...

preface In the previous article, we introduced BridgeInterceptor. In this article, we will introduce CacheInterceptor, which is related to the caching mechanism of OkHttp. Before introducing the caching mechanism of OkHttp, let's first understand the caching mechanism of Http. Cache mechanism of Http Caching mainly refers to the resource co ...