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The use of Fragment in Android case -- Sichuan cuisine menu This case will demonstrate how to display two fragments in one Activity (one Fragment is used to display the list of Sichuan cuisine and one Fragment is used to display the practice of Sichuan cuisine), and realize the communication function between Activity and Fragment 1. Preparati ...

Return stack Activities in Android can be stacked. Every time we start a new activity, it will overwrite the original activity, and then click the Back key to destroy the top activity, and the next activity will be displayed again. In fact, Android uses tasks to manage activities. A Task is a collection of activities stored in the stack, whi ...

In the development of fluent, state management is an eternal topic. The general principle is: if the state is private to the component, it should be managed by the component itself; If the state is to be shared across components, it should be managed by the common parent element of each component. It is easy to understand the state management o ...

What are you doing recently Android Application development, IDE yes android studio , The version configuration used is as follows: compileSdk 32 buildToolsVersion '32.0.0' defaultConfig { applicationId "com.example.gzpersonmanager" minSdk 21 targetSdk 32 versionCode 1 versionName "1.0" testInstrumentationRunner "andr ...

Content provider 1. Introduction to content provider Content provider is mainly used to realize the function of data sharing between different applications. It provides a complete mechanism to allow one program to access the data in another program, and the ring can ensure the security of the accessed data 2. Runtime permissions 1. Detailed ...

"Look at the Handler with questions" 1, Write in front At the beginning of the design, the Android system was designed as a single thread model. In fact, it is not only Android, but also Java Swing Historical reasons of Back to Android, we all know that the UI can only be updated in the UI thread, that is, the main thread, and it is ...

1 Diagram Interpreting Service Here is a diagram of life cycle: basic concepts & interpretation of critical callback methods 2. Interpretation of Service Class Relationships The inheritance diagram for the parent and child classes of the Service class is as follows: 3 Configure Service Both Service and Active are android system com ...

Final report of fundamentals of mobile application design Project Name: On machine assessment of mobile application development foundation Tools, software and environment used: JDK，Android Studio 1, Subject background In the final computer examination, the contents of Experiment 4 and Experiment 5 and the small experiments completed ...

Basic framework <?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="vertical"> <Button android:layout_width="200dp" android:layout_height=" ...