[Android/Java] BlankFragment

Demo

 

구성

• activity
• layout
• fragment

 

MainActivity.java

package com.sjcoding.myapplication;

import android.os.Bundle;

import androidx.appcompat.app.AppCompatActivity;

public class MainActivity extends AppCompatActivity {

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

        /*ExampleFragment fragment = new ExampleFragment();
        Bundle args = new Bundle();
        args.putString("argText", "example text");
        args.putInt("argNumber", 123);
        fragment.setArguments(args);*/

        ExampleFragment fragment = ExampleFragment.newInstance("example text", 123);
        getSupportFragmentManager().beginTransaction().replace(R.id.container, fragment).commit();
    }
}

 

ExampleFragment

package com.sjcoding.myapplication;

import android.os.Bundle;

import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TextView;

import androidx.annotation.NonNull;
import androidx.annotation.Nullable;
import androidx.fragment.app.Fragment;

public class ExampleFragment extends Fragment {
    // 받을 argument
    private static final String ARG_TEXT = "argText";
    private static final String ARG_NUMBER = "argNumber";
    private String text;
    private int number;

    // instance create
    public static ExampleFragment newInstance(String text, int number) {
        ExampleFragment fragment = new ExampleFragment();
        Bundle args = new Bundle();
        args.putString(ARG_TEXT, text);
        args.putInt(ARG_NUMBER, number);
        fragment.setArguments(args);
        return fragment;
    }

    @Nullable
    @Override
    public View onCreateView(@NonNull LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
        View v = inflater.inflate(R.layout.example_fragment, container, false);
        // text view에 글자 셋팅 (넘겨받은 argument들로)
        TextView textView = v.findViewById(R.id.tv_fragment);
        if (getArguments() != null) {
            text = getArguments().getString(ARG_TEXT);
            number = getArguments().getInt(ARG_NUMBER);
        }
        textView.setText(text + number);
        
        return v;
    }
}

 

activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<FrameLayout 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"
    android:id="@+id/container"
    tools:context=".MainActivity">
    
</FrameLayout>

example_fragment.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="@android:color/holo_green_dark"
    android:gravity="center">

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:id="@+id/tv_fragment"
        android:text="Fragment TextView"
        android:textSize="32dp"/>

</LinearLayout>