1. Sample
2. NavigationDrawerActivityのHomeFragmentへImageViewで画像を表示

サンプル

HomeFragment.java

					
import android.content.res.AssetManager;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.TextView;
import android.widget.Toast;

import androidx.annotation.NonNull;
import androidx.annotation.Nullable;
import androidx.constraintlayout.widget.ConstraintLayout;
import androidx.fragment.app.Fragment;
import androidx.lifecycle.Observer;
import androidx.lifecycle.ViewModelProvider;

import com.example.navidrawact.R;
import com.example.navidrawact.databinding.FragmentHomeBinding;

import java.io.InputStream;

public class HomeFragment extends Fragment {

	private HomeViewModel homeViewModel;
	private FragmentHomeBinding binding;
	private ImageView im;
	LinearLayout.LayoutParams layoutParams;
	static public ConstraintLayout layout;

	public View onCreateView(@NonNull LayoutInflater inflater,
								ViewGroup container, Bundle savedInstanceState) {
		homeViewModel =
				new ViewModelProvider(this).get(HomeViewModel.class);

		binding = FragmentHomeBinding.inflate(inflater, container, false);
		View root = binding.getRoot();

		final TextView textView = binding.textHome;
		homeViewModel.getText().observe(getViewLifecycleOwner(), new Observer() {
			@Override
			public void onChanged(@Nullable String s) {
				textView.setText(s);
			}
		});
		AssetManager assets = getResources().getAssets();
		im = new ImageView(root.getContext());
		try (InputStream istream = assets.open("18363472.jpg")) {
			Bitmap bitmap = BitmapFactory.decodeStream(istream);
			im.setImageBitmap(bitmap);
		} catch (Exception e) {
			e.printStackTrace();
		}
		//画像の縦横サイズをimageViewのサイズとして設定
		layoutParams = new LinearLayout.LayoutParams(200, 200);

		layoutParams.leftMargin = 0;
		layoutParams.topMargin = 0;
		im.setLayoutParams(layoutParams);

		//layoutにimageViewを追加
		layout = root.findViewById(R.id.root_home);
		layout.addView(im);

		return root;
	}

	@Override
	public void onDestroyView() {
		super.onDestroyView();
		binding = null;
	}
}
				

fragment_home.xml

					
						
<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=".ui.home.HomeFragment"
    android:id="@+id/root_home">

    <TextView
        android:id="@+id/text_home"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_marginStart="8dp"
        android:layout_marginTop="8dp"
        android:layout_marginEnd="8dp"
        android:textAlignment="center"
        android:textSize="20sp"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent" />
</androidx.constraintlayout.widget.ConstraintLayout>
						
				

HomeFlagmetでImageViewに画像が表示されます。