Programmer Think

Those who are familiar with the drawing process know that ViewGroup can decide the drawing time and call times of child. Today we will start from LinearLayout Start learning and see how many times it calls onMeasure for the child View. For simplicity, we choose the time to enter the Activity in the previous blog When entering Activity, why is ...

Caller show - caller tagging The company's office app has its own address book. Sometimes when others call, the contact information of this contact is not saved in the mobile phone, and they are afraid of harassment after receiving the call. Therefore, I want to add an incoming call tag of our company, that is, the incoming call show function. ...

Public Boolean shoulderoverrideurloading (WebView, string Url) is a method defined in the WebViewClient class. Some online blogs say that the function of this method is to control the opening of Url in the current WebView when the return value is true, and call the system browser or third-party browser when it is false. But in fact, this statem ...

View event system Although View does not belong to the four components, its role is comparable to the four components, and even more important than Receiver and Provider. In Android development, Activity undertakes this visualization function. At the same time, Android system provides many basic controls, such as Button, Textview, CheckBox, et ...

Why Recently, I'm very interested in compilers. Why should I learn the compilation principle? For me, it's because I need to write a DSL and an interpreter recently. For most programmers, learning compilers may have the following three aspects: (1) Learning compiler design can help you better understand the program and how the computer runs ...

1, Introduction to JSON JSON(JavaScript Object Notation) is a lightweight data exchange format. It is based on a subset of JavaScript, which is easy for people to write and read, and easy for machine parsing. JSON adopts a text format completely independent of the language, but it also uses habits similar to the C language family (inclu ...

Learning is done preface Q: an Activity implements onClickListener. At this time, a Button uses setOnClickListener(this) Why is there no memory leak? A: because the View reference object will be released when the Activity is destroyed, there will be no memory leakage. Q: can you make it more detailed? Answer: Yes, Well, the window wi ...

premise Due to the business requirements of the company, the automatic test should meet the following points: Cross application testingStrong readability of test casesThe test report is readableScreenshots of failed use cases are saved and reflected in the report Based on the above points, we chose uiautomator when selecting the automation t ...

1, Network access overview Let's explain and review. We learned Android's UI, various layouts and controls before. In fact, when we work in the future, this UI does not need us to design. A designer will design the UI for us, and then we will restore the UI in the form of code in xml file. For example, the following figure is the data c ...

The horizontal layout and the vertical layout of cistrant Android are very familiar. Does it seem that the horizontal layout and the vertical layout of cistrant Android are well aligned? In fact, it is an upgraded version of the relative layout, layout_contrainTop_toBottomof: in fact, the upper edge of the current component is aligned wit ...