Navigation

MainActivity

import androidx.appcompat.app.AppCompatActivity
import android.os.Bundle
import androidx.navigation.findNavController
import androidx.navigation.ui.setupActionBarWithNavController

class MainActivity : AppCompatActivity() {
    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)
        setupActionBarWithNavController(findNavController(R.id.fragmentContainerView))
    }

    override fun onSupportNavigateUp(): Boolean {
        val controller = findNavController(R.id.fragmentContainerView)
        return controller.navigateUp() || super.onSupportNavigateUp()
    }
}

dependencies

implementation("androidx.navigation:navigation-fragment-ktx:2.5.2")
implementation("androidx.navigation:navigation-ui-ktx:2.5.2")

MainFragment

import android.os.Bundle
import androidx.fragment.app.Fragment
import android.view.LayoutInflater
import android.view.View
import android.view.ViewGroup
import android.widget.Button
import androidx.navigation.fragment.findNavController
import com.neco_dev.navtesty.R

class MainFragment : Fragment() {

    override fun onCreateView(
        inflater: LayoutInflater, container: ViewGroup?,
        savedInstanceState: Bundle?
    ): View? {
        // Inflate the layout for this fragment
        return inflater.inflate(R.layout.fragment_main, container, false)
    }

    override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
        super.onViewCreated(view, savedInstanceState)
        val bF1 = view.findViewById<Button>(R.id.buttonF1)
        val bF2 = view.findViewById<Button>(R.id.buttonF2)
        val controller = findNavController()
        bF1.setOnClickListener { controller.navigate(R.id.fragment1) }
        bF2.setOnClickListener { controller.navigate(R.id.fragment2) }
    }

}

Fragment1

import android.os.Bundle
import androidx.fragment.app.Fragment
import android.view.LayoutInflater
import android.view.View
import android.view.ViewGroup
import com.neco_dev.navtesty.R

class Fragment1 : Fragment() {

    override fun onCreateView(
        inflater: LayoutInflater, container: ViewGroup?,
        savedInstanceState: Bundle?
    ): View? {
        // Inflate the layout for this fragment
        return inflater.inflate(R.layout.fragment_1, container, false)
    }
}

Fragment2

import android.os.Bundle
import androidx.fragment.app.Fragment
import android.view.LayoutInflater
import android.view.View
import android.view.ViewGroup
import com.neco_dev.navtesty.R

class Fragment2 : Fragment() {

    override fun onCreateView(
        inflater: LayoutInflater, container: ViewGroup?,
        savedInstanceState: Bundle?
    ): View? {
        // Inflate the layout for this fragment
        return inflater.inflate(R.layout.fragment_2, container, false)
    }
}

activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MainActivity">

    <fragment
        android:id="@+id/fragmentContainerView"
        android:name="androidx.navigation.fragment.NavHostFragment"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        app:defaultNavHost="true"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        app:navGraph="@navigation/main_nav" />
</androidx.constraintlayout.widget.ConstraintLayout>

fragment_main.xml

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".fragments.MainFragment">

    <Button
        android:id="@+id/buttonF2"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_marginStart="5dp"
        android:layout_marginEnd="5dp"
        android:text="Frag 2"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent" />

    <Button
        android:id="@+id/buttonF1"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:text="frag 1"
        app:layout_constraintBottom_toTopOf="@+id/buttonF2"
        app:layout_constraintEnd_toEndOf="@+id/buttonF2"
        app:layout_constraintStart_toStartOf="@+id/buttonF2" />
</androidx.constraintlayout.widget.ConstraintLayout>

fragment,1.xml

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".fragments.Fragment1">

    <TextView
        android:id="@+id/textView"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Frag 1"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent" />
</androidx.constraintlayout.widget.ConstraintLayout>

fragment_2.xml

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".fragments.Fragment2">
    <TextView
        android:id="@+id/textView"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Frag 2"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent" />

</androidx.constraintlayout.widget.ConstraintLayout>

main_nav.xml

<?xml version="1.0" encoding="utf-8"?>
<navigation xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/main_nav"
    app:startDestination="@id/mainFragment">

    <fragment
        android:id="@+id/mainFragment"
        android:name="com.neco_dev.navtesty.fragments.MainFragment"
        android:label="fragment_main"
        tools:layout="@layout/fragment_main" >
        <action
            android:id="@+id/action_mainFragment_to_fragment1"
            app:destination="@id/fragment1" />
        <action
            android:id="@+id/action_mainFragment_to_fragment2"
            app:destination="@id/fragment2" />
    </fragment>
    <fragment
        android:id="@+id/fragment1"
        android:name="com.neco_dev.navtesty.fragments.Fragment1"
        android:label="fragment_1"
        tools:layout="@layout/fragment_1" />
    <fragment
        android:id="@+id/fragment2"
        android:name="com.neco_dev.navtesty.fragments.Fragment2"
        android:label="fragment_2"
        tools:layout="@layout/fragment_2" />
</navigation>

1 комментарий для “Navigation”

  1. Антон

    Здравствуйте. Хотелось бы узнать про работу с USB из андроид студио. Нет ли у Вас возможности освятить эту тему?

    Ответить

Добавить комментарий

Ваш адрес email не будет опубликован.