Layoutdatei

fragment_menu.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="horizontal" android:layout_width="match_parent"
    android:layout_height="match_parent">

        <Button
            android:onClick="onClickUserInfo"
            android:layout_width="0dp"
            android:layout_height="match_parent"
            android:layout_weight="0.25"
            android:id="@+id/userInfoButton"
            android:text="@string/btnUserInfo"
            />
        <Button
            android:onClick="onClickColor"
            android:layout_width="0dp"
            android:layout_height="match_parent"
            android:layout_weight="0.25"
            android:id="@+id/colorButton"
            android:text="@string/btnColor"
            />


        <Button
            android:onClick="onClickDrink"
            android:layout_width="0dp"
            android:layout_height="match_parent"
            android:layout_weight="0.25"
            android:id="@+id/drinkButton"
            android:text="@string/btnDrink"
            />
        <Button
            android:onClick="onClickFood"
            android:layout_width="0dp"
            android:layout_height="match_parent"
            android:layout_weight="0.25"
            android:id="@+id/foodButton"
            android:text="@string/btnFood"
            />

</LinearLayout>

Java-Quellcode

MenuFragment.java

package jp.co.casareal.sample.fragmentsample.fragment;

import android.app.Activity;
import android.content.Context;
import android.net.Uri;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentManager;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;

import jp.co.casareal.sample.fragmentsample.R;


public class MenuFragment extends Fragment {

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState) {
       return inflater.inflate(R.layout.fragment_menu, container, false);
    }


}

Aktivitäten, die den gesamten Bildschirm ausmachen

Fragment-Tag

Fragment, das vier Schaltflächen anzeigt, wird durch das -Tag beschrieben und durch das name-Attribut mit Java verknüpft. Die ID wird im Attribut id angegeben, damit das beim Drücken der Taste angezeigte Frament dynamisch ersetzt werden kann.

Fragment ersetzen

Rufen Sie die Methode beginTransaction () der FragmentManager-Klasse auf, um die FragmentTransaction abzurufen. Das Fragment wird durch die replace () -Methode ersetzt. Rufen Sie nach dem Festlegen des Fragments die Methode commit () auf. Wenn Sie das vorherige Fragment anzeigen möchten, wenn die Zurück-Taste gedrückt wird, können Sie auch das Timing für die Fragmenteinstellung verwenden. Muss mit der Methode addToBackStack () im Backstack gespeichert werden.

Layoutdatei

activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.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="jp.co.casareal.sample.fragmentsample.MainActivity">

    <FrameLayout
        android:id="@+id/menuFrame"
        android:layout_width="368dp"
        android:layout_height="wrap_content"
        android:layout_marginRight="8dp"
        app:layout_constraintRight_toRightOf="parent"
        android:layout_marginLeft="8dp"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        android:layout_marginTop="8dp"
        android:layout_marginStart="8dp"
        android:layout_marginEnd="8dp">

    <fragment
        android:id="@+id/menuFragment"
        android:name="jp.co.casareal.sample.fragmentsample.fragment.MenuFragment"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        tools:layout="@layout/fragment_menu"
        />
    </FrameLayout>

    <FrameLayout
        android:id="@+id/contents"
        android:layout_width="368dp"
        android:layout_height="417dp"

        android:layout_marginBottom="8dp"
        android:layout_marginLeft="8dp"
        android:layout_marginRight="8dp"
        android:layout_marginTop="8dp"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintHorizontal_bias="0.0"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintRight_toRightOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/menuFrame"
        app:layout_constraintVertical_bias="0.0" />
</android.support.constraint.ConstraintLayout>

Java-Quellcode

MainActivity.java

package jp.co.casareal.sample.fragmentsample;




import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentTransaction;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;
import android.view.View;

import jp.co.casareal.sample.fragmentsample.fragment.ColorFragment;
import jp.co.casareal.sample.fragmentsample.fragment.DrinkFragment;
import jp.co.casareal.sample.fragmentsample.fragment.FoodFragment;
import jp.co.casareal.sample.fragmentsample.fragment.UserInfoFragment;

public class MainActivity extends AppCompatActivity {

    private FragmentManager fragmentManager;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        fragmentManager = getSupportFragmentManager();
    }

    public void onClickUserInfo(View view) {
        Fragment fragment = new UserInfoFragment();
        FragmentTransaction transaction = fragmentManager.beginTransaction();
        transaction.replace(R.id.contents,fragment );
        transaction.addToBackStack(null);
        transaction.commit();
    }

    public void onClickColor(View view) {
        Fragment fragment = new ColorFragment();
        FragmentTransaction transaction = fragmentManager.beginTransaction();
        transaction.replace(R.id.contents,fragment );
        transaction.addToBackStack(null);
        transaction.commit();
    }

    public void onClickDrink(View view) {
        Fragment fragment = new DrinkFragment();
        FragmentTransaction transaction = fragmentManager.beginTransaction();
        transaction.replace(R.id.contents,fragment );
        transaction.addToBackStack(null);
        transaction.commit();

    }

    public void onClickFood(View view) {
        Fragment fragment = new FoodFragment();
        FragmentTransaction transaction = fragmentManager.beginTransaction();
        transaction.replace(R.id.contents,fragment );
        transaction.addToBackStack(null);
        transaction.commit();
    }
}

Referenz

https://developer.android.com/guide/components/fragments.html