카메라 찍기

public class MainActivity extends AppCompatActivity {
    ImageView imageView;

    File outputFile;
    FrameLayout container;
    
    CameraSurfaceView cameraView;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        imageView = (ImageView) findViewById(R.id.imageView);
        container = (FrameLayout) findViewById(R.id.container);

        cameraView = new CameraSurfaceView(this);
        container.addView(cameraView);

        File storageDir = Environment.getExternalStorageDirectory();
        outputFile = new File(storageDir, "output.jpg");
    }

    public void onButton1Clicked(View v) {
        
        cameraView.capture(new android.hardware.Camera.PictureCallback() {
            @Override
            public void onPictureTaken(byte[] data, android.hardware.Camera camera) {
                BitmapFactory.Options options = new BitmapFactory.Options();
                options.inSampleSize = 8;
                BitmapFactory.decodeByteArray(data,0,data.length,options);
            }
        });
    }

    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        if (requestCode == 1001) {
            // 카메라앱 화면에서 받음
            BitmapFactory.Options options = new BitmapFactory.Options();
            options.inSampleSize = 8;
            Bitmap bitmap = BitmapFactory.decodeFile(outputFile.getAbsolutePath(), options);
            imageView.setImageBitmap(bitmap);
        }
    }

    class CameraSurfaceView extends SurfaceView implements SurfaceHolder.Callback {
        SurfaceHolder holder;
        android.hardware.Camera camera = null;

        CameraSurfaceView(Context context) {
            super(context);
            Init(context);
        }

        CameraSurfaceView(Context context, AttributeSet attrs) {
            super(context, attrs);
            Init(context);
        }

        private void Init(Context context) {
            holder = getHolder();
            holder.addCallback(this);
        }

        @Override
        public void surfaceCreated(SurfaceHolder holder) {
            try {
                camera = android.hardware.Camera.open();
                camera.setPreviewDisplay(holder);
            } catch (Exception e){
                e.printStackTrace();
            }
        }

        @Override
        public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) {
            camera.startPreview();
        }

        @Override
        public void surfaceDestroyed(SurfaceHolder holder) {
            camera.startPreview();
            camera.release();
            camera = null;
        }
        public boolean capture(android.hardware.Camera.PictureCallback callback){
            if(camera != null){
                camera.takePicture(null,null,callback);
                return true;
            } else{
                return false;
            }
        }
    }//기본이 두개가 필요
}