Use the "Activity Compose" framework in the Java Library to quickly develop user interface
Use the "Activity Compose" framework in the Java Library to quickly develop user interface
With the continuous development of mobile applications and web applications, the development of user interface has become increasingly important.In order to improve development efficiency and convenience, the "Activity Compose" framework in the Java library came into being.This framework provides a statement of statement to build a user interface, allowing developers to develop interfaces that adapt to different screen size and equipment.
Before using the "Activity Compose" framework to rapidly develop the user interface, we need to write related configuration and programming code.
First, we need to add the following dependencies to the project's build.gradle file:
dependencies {
implementation 'androidx.activity:activity-compose:1.4.0'
}
Next, we create a new main activity based on the "Activity" class, and use the "@andRoidentrypoint" annotation at this event to use the "Compose" function in it.
import androidx.appcompat.app.AppCompatActivity
import androidx.compose.foundation.layout.Column
import androidx.compose.material.Button
import androidx.compose.material.Text
import androidx.compose.ui.platform.setContent
import androidx.compose.ui.viewinterop.AndroidView
import android.os.Bundle
import androidx.activity.compose.setContent
import dagger.hilt.android.AndroidEntryPoint
@AndroidEntryPoint
class MainActivity : AppCompatActivity() {
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setContent {
Column {
AndroidView(
modifier = Modifier.fillMaxWidth().aspectRatio(1f),
factory = { context ->
MyCustomView(context)
}
)
Button(onClick = {}) {
Text (text = "This is a button")
}
}
}
}
}
In the above code, we set the content of the main activity by calling the `setContent` function. This function accepts the description of a combination interface as a parameter.In this example, we used compose components such as `column` and` Button` to build interfaces.We also use the `AndroidView` component, which allows us to use a custom Android view in the compose interface.
At the same time, we added the annotation of the main activity category `@AndroidENTRYPoint`, which is to allow the HILT dependencies to work normally.
Next, let's write a customized Android view "MyCustomView", which can be a custom view class.We can write any Android UI code in this view.
import android.content.Context
import android.widget.Button
import android.widget.LinearLayout
class MyCustomView(context: Context) : LinearLayout(context) {
init {
orientation = VERTICAL
val button = Button(context)
Button.text = "This is a custom view"
addView(button)
}
}
In this code, we created a custom view class that inherited from Linearlayout and added a button to it.
Finally, we need to configure activities and applications correctly in the AndroidManifest.xml file:
<application
...>
<activity
android:name=".MainActivity"
android:label="@string/app_name"
android:theme="@style/Theme.MyApp">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
In the above code, we set the theme of the activity as a custom application theme.
Through the above configuration and code writing, we can use the "Activity Compose" framework in the Java class library to quickly develop the user interface.By building the interface by statement, we can more efficiently and conveniently meet the needs of different equipment and screen size.
