[Android Studio] 기본 카메라 사진 찍고 이미지뷰에 출력하기

xml

 

<RelativeLayout 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/mainLayout"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    tools:context=".MainActivity">

    <ImageView
        android:id="@+id/imageView"
        android:layout_width="200dp"
        android:layout_height="200dp"
        android:layout_centerInParent="true"
        android:scaleType="centerCrop"
        android:src="@mipmap/ic_launcher" />

    <Button
        android:id="@+id/pic_btn"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_below="@id/imageView"
        android:layout_centerHorizontal="true"
        android:layout_marginTop="30dp"
        android:text="사진 촬영"
        android:textSize="20sp" />

</RelativeLayout>

 

java

 

package com.example.myapplication;

import androidx.activity.result.ActivityResult;
import androidx.activity.result.ActivityResultCallback;
import androidx.activity.result.ActivityResultLauncher;
import androidx.activity.result.contract.ActivityResultContracts;
import androidx.appcompat.app.AppCompatActivity;

import android.content.Intent;
import android.graphics.Bitmap;
import android.os.Bundle;
import android.provider.MediaStore;
import android.view.View;
import android.widget.Button;
import android.widget.ImageView;

public class MainActivity extends AppCompatActivity {
    Bitmap bitmap;

    ImageView imageView;

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

        imageView = findViewById(R.id.imageView);

        Button picBtn = findViewById(R.id.pic_btn);
        picBtn.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
                activityResultPicture.launch(intent);
            }
        });
    }

    ActivityResultLauncher<Intent> activityResultPicture = registerForActivityResult(
            new ActivityResultContracts.StartActivityForResult(),
            new ActivityResultCallback<ActivityResult>() {
                @Override
                public void onActivityResult(ActivityResult result) {

                    // 데이터가 null 아니면
                    if( result.getResultCode() == RESULT_OK && result.getData() != null){
                        Bundle extras = result.getData().getExtras();

                        bitmap = (Bitmap) extras.get("data");

                        imageView.setImageBitmap(bitmap);
                    }
                }
            });
}