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IF expressionAn if statement contains a Boolean expression and one or more statements.// Traditional Use var max = a if (a < b) max = b // Use else var max: Int if (a > b) { max = a } else { max = b } // As an expression val max = if (a > b) a else bWe can also assign the result of the IF expression to a variable.val max ...

prefaceAs for intercepting exceptions, you must know that you can use thread Setdefaultuncaughtexceptionhandler to intercept exceptions in the App and then handle them.So I had an immature idea...Let my APP never collapseSince we can intercept crashes, we can directly intercept all exceptions in the APP without killing the program. Such an APP ...

You need to add the necessary dependent libraries in the project first. Edit app / build Gradle file, add the following contents to the dependencies closure: dependencies { ... implementation 'com.squareup.retrofit2:retrofit:2.6.1' implementation 'com.squareup.retrofit2:converter-gson:2.6.1' } Use examples 1. Add an entity class ...

3.4 TouchListener PK OnTouchEvent + multi touch classification Android basics tutorial Introduction to this section: For example, this section brings you the comparison between TouchListener and OnTouchEvent, as well as the knowledge points of multi touch! TouchListener is based on listening, while OnTouchEvent ...

WebView brief introduction It is generally used to load some network interfacesAndroid is a high-performance browser with built-in webkit kernel, and WebView is a control encapsulated on this basis. WebView can be simply regarded as a browser control that can be nested on the interface! method WebChromeClient Assist WebView in handling Ja ...

preface If we want to execute multiple time-consuming tasks, the first thing we think of is to create multiple threads to execute tasks. If we have learned thread pool, we can also use thread pool. Is there anything lighter than thread pool? Handler, find out~ what! Can the Handler also perform time-consuming tasks? Then the problem comes ...

The above special effect is the effect of Toolbar combined with CoordinatorLayout/AppbarLayout/CollapsingToolbarLayout; Using these views alone has no effect. Generally, they need to cooperate with each other. brief introduction CoordinatorLayout: Coordinator means coordinator after translation. It is mainly used to coordinate how the sub ...

Application scenario: The marked face information is recognized through hongruan sdk, and the recognized results are sent to android client to notify business personnel, so as to obtain customer information at the first time. Welcome system, Shangchao special personnel notification system, etc. can be used The effects are as follows: F ...

This article is based on Android 8 1 source code. Here is a simple writing method and call of HAL. I will write an app interface that directly calls HAL, and the HAL layer code will directly read and write the driven node. brief introduction A new element of Android O is Project Treble. This is a major change in the a ...

Main codes involved in this chapter: frameworks\base\services\core\java\com\android\server\SystemServer.java frameworks\base\services\core\java\com\android\server\wm\WindowManagerService.java frameworks\base\services\core\java\com\android\server\wm\WindowAnimator.java frameworks\base\services\core\java\com\android\server\AnimationThread.jav ...