Android to resolve Android Studio in the type of directory structure

 

 app: After creating the project, automatically create a name for the Module app

manifests: Save the configuration file

java: Save java source code files

res: save the resource file

Gradle Scripts: Gradle build and save the file attributes

 

Node manifests
manifests node for displaying a profile Android application

<? XML Version = "1.0" encoding = "UTF-. 8"?> 
<the manifest xmlns: Android = "http://schemas.android.com/apk/res/android" // the manifest root node, the package described in All content
 // xmlns: android statement containing namespace 
    package = "com.example.androiduidemo"> // declare the application package
 
    <application   // root node contains package-level components in the application declared 
        android: allowBackup = "true" 
        Android: icon = "@ mipmap / ic_launcher" // application icon 
        Android: label = "@ String / app_name" // applications tab, the application shall specify the name of 
        Android: roundIcon = "@ mipmap / ic_launcher_round" 
        Android:supportsRtl="true"
        android:theme= "@ style / AppTheme"> // subject of an application using the 
        <Activity Android: name =. "MainActivity"> // and the main tool for user interaction, it is a user opens an application's initial screen 
            <intent-filter > // configure Intent filter
             // assembly supported by the Action Intent 
                <Action Android: name = "android.intent.action.MAIN" /> // component supports the category Intent 
                <category Android: name = "android.intent.category .LAUNCHER "/> 
            </ Intent-filter> 
        </ Activity> 
    </ file application> 
</ the manifest>
            

 

 

 The former store Java source files, which is a unit test node

 

Default generation MainActivity.java

Package com.example.androiduidemo; // the specified package 

Import androidx.appcompat.app.AppCompatActivity; 

Import android.os.Bundle;
 // import class 

public  class the MainActivity the extends AppCompatActivity {
 // this is the callback method when creating Activity, for performing the initialization the Activity 
    @Override
     protected  void the onCreate (the Bundle savedInstanceState) {
         Super .onCreate (savedInstanceState); 
        the setContentView (R.layout.caculatur_layout); // call to the layout file layout run 
    } 
}

 

 

 

drawable subdirectory

 drawable subdirectory is often used to save the image resources, such as PNG, JPEG, GIF pictures, 9-Patch Shape or resource file

 

layout subdirectories

layout subdirectory mainly used to store layout file

 

mipmap subdirectory

Mainly used to save the application icon to start the project

 

values ​​subdirectory

subdirectory is commonly used string values, style and size used in the application resource conservation.