エラー対処法を教えてください(java)(Android studio)

ツール：Androidstudio
エラー：Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'android.os.Bundle android.content.Intent.getExtras()' on a null object reference
言語：java

＜ソース＞
import androidx.appcompat.app.AppCompatActivity;

import android.content.Context;
import android.graphics.Bitmap;
import android.media.AudioAttributes;
import android.media.SoundPool;
import android.os.Bundle;
import android.content.Intent;
import android.provider.MediaStore;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.ImageView;

import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;

public class Camera extends AppCompatActivity {
private final static int RESULT_CAMERA = 1001;
private SoundPool oto,ooto;
private int cat,dog;
Bitmap bitmap;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_camera);

    AudioAttributes audioAttributes = new AudioAttributes.Builder()
            .setUsage(AudioAttributes.USAGE_GAME)
            .setContentType(AudioAttributes.CONTENT_TYPE_SPEECH)
            .build();

    oto = new SoundPool.Builder()
            .setAudioAttributes(audioAttributes)
            .setMaxStreams(2)
            .build();

    ooto = new SoundPool.Builder()
            .setAudioAttributes(audioAttributes)
            .setMaxStreams(2)
            .build();

    cat=  oto.load(this, R.raw.bottan,1);
    dog=  ooto.load(this, R.raw.back,1);

    Button cameraButton = findViewById(R.id.camerabutton);
        cameraButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);

                startActivityForResult(intent, RESULT_CAMERA);
            }
        });
    Button btn = (Button) findViewById(R.id.collec);
    btn.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            oto.play(cat, 1.0f, 1.0f, 0, 0, 1.0f);
            Intent intent = new Intent(Camera.this, Zujon.class);
            startActivity(intent);
        }
    });
    Button btt;
    btt = findViewById(R.id.colle);
    btt.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            ooto.play(dog, 1.0f, 1.0f, 0, 0, 1.0f);
            Intent intent = new Intent(Camera.this,japanesesel.class);
            startActivity(intent);
        }
    });
}

@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    super.onActivityResult(requestCode, resultCode, data);
    if (requestCode == RESULT_CAMERA) {
        // cancelしたケースも含む
        if (data.getExtras() == null) {
            Log.d("debug", "cancel ?");
            return;
        } else {
            bitmap = (Bitmap) data.getExtras().get("data");
            if (bitmap != null) {
                // 画像サイズを計測
                int bmpWidth = bitmap.getWidth();
                int bmpHeight = bitmap.getHeight();
                Log.d("debug", String.format("w= %d", bmpWidth));
                Log.d("debug", String.format("h= %d", bmpHeight));
            }
        }
        //imageView.setImageBitmap(bitmap);
    }
    Intent intent = new Intent(getApplicationContext(), Seartchj.class).putExtra("data", bitmap);
    startActivity(intent);
}