[Android]SurfaceView Camera Preview(카메라 프리뷰)

예제를 많이 찾아보다가 소스 짜집기해서 적당히 쓸만해서 올려봅니다.

서피스뷰가 작동을 잘 안하길래 엄청 고생했네요..

레이아웃에 addView하는식으로 작성하게되면..

onMeasure()에서 크기가 0으로만 나옵니다.

무조건 FrameLayout 에만 addView하세요.

xml

<?xml version="1.0" encoding="utf-8"?>
 
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent">
 
    <com.jyp.ttt.view.CameraPreview
        android:id="@+id/main"
        android:layout_width="match_parent"
        android:layout_height="match_parent">
 
    </com.jyp.ttt.view.CameraPreview>
 
    <Button
        android:id="@+id/button"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:background="#55FFFFFF"
        android:layout_alignParentBottom="true"
        android:layout_centerHorizontal="true"
        android:text="찍기" />
 
</RelativeLayout>
 
 
 

메인 액티비티입니다.

public class MainActivity extends AppCompatActivity {
 
    Button cameraButton;
 
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        requestWindowFeature(Window.FEATURE_NO_TITLE);
        getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, WindowManager.LayoutParams.FLAG_FULLSCREEN);
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main_layout_test);
 
        final CameraPreview surfaceView = (CameraPreview) findViewById(R.id.main);
        SurfaceHolder holder = surfaceView.getHolder();
        holder.addCallback(surfaceView);
        holder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
 
        cameraButton = (Button) findViewById(R.id.button);
        cameraButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                surfaceView.takePhoto(new Camera.PictureCallback() {
                    @Override
                    public void onPictureTaken(byte[] data, Camera camera) {
                        Bitmap bitmap = BitmapFactory.decodeByteArray(data,0,data.length);
                        Log.v("","");
                    }
                });
            }
        });
    }
}
 
 
 

카메라 뷰

public class CameraPreview extends SurfaceView implements SurfaceHolder.Callback {
    private Camera mCamera;
    public List<Camera.Size> prSupportedPreviewSizes;
    private Camera.Size prPreviewSize;
 
    public CameraPreview(Context context) {
        super(context);
        Log.v("jyp@@@","CameraPreview(Context context) 생성자호출");
    }
 
    public CameraPreview(Context context, AttributeSet attrs) {
        super(context, attrs);
        Log.v("jyp@@@", "CameraPreview(Context context, AttributeSet attrs) 생성자호출");
        mCamera = Camera.open();
        prSupportedPreviewSizes = mCamera.getParameters().getSupportedPreviewSizes();
    }
 
    public boolean takePhoto(Camera.PictureCallback handler){
        if(mCamera != null){
            mCamera.takePicture(null,null,handler);
            return true;
        }else{
            return false;
        }
    }
 
    @Override
    public void surfaceCreated(SurfaceHolder holder) {
        Log.v("jyp@@@","surfaceCreated ");
        // Surface가 생성되었으니 프리뷰를 어디에 띄울지 지정해준다. (holder 로 받은 SurfaceHolder에 뿌려준다.
        try {
 
            Camera.Parameters parameters = mCamera.getParameters();
            if (getResources().getConfiguration().orientation != Configuration.ORIENTATION_LANDSCAPE) {
                parameters.set("orientation", "portrait");
                mCamera.setDisplayOrientation(90);
                parameters.setRotation(90);
            } else {
                parameters.set("orientation", "landscape");
                mCamera.setDisplayOrientation(0);
                parameters.setRotation(0);
            }
            mCamera.setParameters(parameters);
 
            mCamera.setPreviewDisplay(holder);
            mCamera.startPreview();
        } catch (IOException e) {
            Log.d(TAG, "Error setting camera preview: " + e.getMessage());
        }
    }
 
    @Override
    public void surfaceDestroyed(SurfaceHolder holder) {
        Log.v("jyp@@@","surfaceDestroyed ");
        // 프리뷰 제거시 카메라 사용도 끝났다고 간주하여 리소스를 전부 반환한다
        if (mCamera != null) {
            mCamera.stopPreview();
            mCamera.release();
            mCamera = null;
        }
    }
 
 
    private Camera.Size getBestPreviewSize(int width, int height)
    {
        Camera.Size result=null;
        Camera.Parameters p = mCamera.getParameters();
        for (Camera.Size size : p.getSupportedPreviewSizes()) {
            if (size.width<=width && size.height<=height) {
                if (result==null) {
                    result=size;
                } else {
                    int resultArea=result.width*result.height;
                    int newArea=size.width*size.height;
 
                    if (newArea>resultArea) {
                        result=size;
                    }
                }
            }
        }
        return result;
    }
 
    @Override
    public void surfaceChanged(SurfaceHolder holder, int format, int w, int h) {
        Log.v("jyp@@@","surfaceChanged ");
        // 프리뷰를 회전시키거나 변경시 처리를 여기서 해준다.
        // 프리뷰 변경시에는 먼저 프리뷰를 멈춘다음 변경해야한다.
        if (holder.getSurface() == null){
            // 프리뷰가 존재하지 않을때
            return;
        }
 
        // 우선 멈춘다
        try {
            mCamera.stopPreview();
        } catch (Exception e){
            // 프리뷰가 존재조차 하지 않는 경우다
        }
 
        // 프리뷰 변경, 처리 등을 여기서 해준다.
        Camera.Parameters parameters = mCamera.getParameters();
        List<String> focusModes = parameters.getSupportedFocusModes();
        if (focusModes.contains(Camera.Parameters.FOCUS_MODE_AUTO)) {
            parameters.setFocusMode(Camera.Parameters.FOCUS_MODE_AUTO);
        }
//
//        Camera.Size size = getBestPreviewSize(w, h);
        Log.v("jyp@@@","surfaceChanged  width: "+prPreviewSize.width);
        Log.v("jyp@@@","surfaceChanged  height: "+prPreviewSize.height);
 
        parameters.setPreviewSize(prPreviewSize.width, prPreviewSize.height);
        mCamera.setParameters(parameters);
        // 새로 변경된 설정으로 프리뷰를 재생성한다
        try {
            mCamera.setPreviewDisplay(holder);
            mCamera.startPreview();
 
        } catch (Exception e){
            Log.d(TAG, "Error starting camera preview: " + e.getMessage());
        }
    }
 
    @Override
    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
        Log.v("jyp@@@","onMeasure()");
 
        final int width = resolveSize(getSuggestedMinimumWidth(), widthMeasureSpec);
        final int height = resolveSize(getSuggestedMinimumHeight(), heightMeasureSpec);
        Log.v("jyp@@@","width: "+width);
        Log.v("jyp@@@","height: "+height);
        setMeasuredDimension(width, height);
 
        if (prSupportedPreviewSizes != null) {
            prPreviewSize = getOptimalPreviewSize(prSupportedPreviewSizes, width, height);
            Log.v("jyp@@@","prPreviewSize.width: "+prPreviewSize.width);
            Log.v("jyp@@@","prPreviewSize.height: "+prPreviewSize.height);
        }
    }
 
    public Camera.Size getOptimalPreviewSize(List<Camera.Size> sizes, int w, int h) {
 
        final double ASPECT_TOLERANCE = 0.1;
        double targetRatio = (double) h / w;
 
        if (sizes == null)
            return null;
 
        Camera.Size optimalSize = null;
        double minDiff = Double.MAX_VALUE;
 
        int targetHeight = h;
 
        for (Camera.Size size : sizes) {
            double ratio = (double) size.width / size.height;
            if (Math.abs(ratio - targetRatio) > ASPECT_TOLERANCE)
                continue;
 
            if (Math.abs(size.height - targetHeight) < minDiff) {
                optimalSize = size;
                minDiff = Math.abs(size.height - targetHeight);
            }
        }
 
        if (optimalSize == null) {
            minDiff = Double.MAX_VALUE;
            for (Camera.Size size : sizes) {
                if (Math.abs(size.height - targetHeight) < minDiff) {
                    optimalSize = size;
                    minDiff = Math.abs(size.height - targetHeight);
                }
            }
        }
 
        return optimalSize;
    }
 
}
 
 
 
 
 
 

매니페스트 파일에는 

<activity
    android:name=".MainActivity"
    android:label="@string/app_name"
    android:screenOrientation="portrait"
    android:theme="@style/AppTheme">

요정도 해주세요

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