Android support library file file practical guide: Java class library development essential
Android support library file file practical guide: Java class library development essential
Brief introduction
==========================
The Android support library is an important tool provided by developers to help developers in different versions of the latest features compatible with the latest features.Instead of packaging a complete APK file to adapt to different devices and Android versions, developers can simply quote and use the functions provided by the support library.This guide will introduce how to use the archives in the Android support library to the best, and provide some Java code examples to illustrate its usage.
Download and import support library file files
==========================
1. First, open the project in Android Studio, and add the following code in the `DependenCies` in the` build.gradle` file:
groovy
dependencies {
implementation 'com.android.support:appcompat-v7:28.0.0'
implementation 'com.android.support:design:28.0.0'
// Add other required support library file files
}
2. Click the "Sync Project with Gradle Files" button in the upper right corner to ensure that the project has been synchronized and downloaded the required files.
Note: In the above example, we use the latest version of the support library.Make sure you use the latest version of the support library suitable for your project needs here.
Use the support library file file
==========================
Once the support library file is successfully imported into the project, you can start using the functions.Here are some common support library file files and their usage:
1. AppComPat library: provides tools that provide compatibility with the older version of Android system, such as using the latest Material Design theme.
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
public class MainActivity extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
// Add your AppCompat function code here
}
}
2. Design library: provides some Material Design components, such as FloatingActionButton, TextINPUTLAYOUT, etc.
import android.support.design.widget.FloatingActionButton;
import android.support.design.widget.Snackbar;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
public class MainActivity extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
FloatingActionButton fab = findViewById(R.id.fab);
fab.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
Snackbar.make(view, "Replace with your own action", Snackbar.LENGTH_LONG)
.setAction("Action", null).show();
}
});
}
}
These are just two examples, and many other support library files can help you achieve more advanced functions in Android applications.
Summarize
==========================
This article introduces the practical guide of the Android support library archives, and provides some examples of Java code using support libraries.By correcting and using these files, developers can easily achieve new features and components on different versions of the Android systems of different versions.Hope this guide will be helpful to your Android development work!
