SurfaceView에 카메라를 쓰려는데 앱이 꺼져버립니다.. ㅠㅠ

Question

아래가 소스입니다... 

에러는 없는데 앱이 종료됩니다

btn_exit는 액티비티 종료에요..

 

import android.app.Activity;
import android.graphics.Camera;
import android.hardware.camera2.CameraDevice;
import android.media.MediaRecorder;
import android.os.Bundle;
import android.support.annotation.Nullable;
import android.view.SurfaceHolder;
import android.view.SurfaceView;
import android.view.View;
import android.widget.Button;

import java.io.IOException;
import java.util.List;

/**
 * Created by argo on 2017-07-24.
 */

public class SubActivity extends Activity implements SurfaceHolder.Callback{
    Button btn_exit;

    private CameraDevice camera;
    private SurfaceView mCameraView;
    private SurfaceHolder mCameraHolder;
    private android.hardware.Camera mCamera;
    private Button mStart;
    private boolean recording = false;
    private MediaRecorder mediaRecorder;


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

        btn_exit = (Button) findViewById(R.id.btn_exit);

        btn_exit.setOnClickListener(new View.OnClickListener() {    // 액티비티 종료
            @Override
            public void onClick(View v) {
                finish();
            }
        });

        init();
    }

    private void init(){

        mCamera = android.hardware.Camera.open();
        mCamera.setDisplayOrientation(90);

        // surfaceview setting
        mCameraHolder = mCameraView.getHolder();
        mCameraHolder.addCallback(this);
        mCameraHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
    }

    @Override
    public void surfaceCreated(SurfaceHolder holder) {
        try {
            if (mCamera == null) {
                mCamera.setPreviewDisplay(holder);
                mCamera.startPreview();
            }
        } catch (IOException e) {
        }
    }

    @Override
    public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) {
        if(mCameraHolder.getSurface() == null){
            return;
        }

        try{
            mCamera.stopPreview();
        }catch (Exception e){

        }

        android.hardware.Camera.Parameters parameters = mCamera.getParameters();
        List<String> focusModes = parameters.getSupportedFocusModes();
        if (focusModes.contains(android.hardware.Camera.Parameters.FOCUS_MODE_AUTO)) {
            parameters.setFocusMode(android.hardware.Camera.Parameters.FOCUS_MODE_AUTO);
        }
        mCamera.setParameters(parameters);

        // View 를 재생성한다.
        try {
            mCamera.setPreviewDisplay(mCameraHolder);
            mCamera.startPreview();
        } catch (Exception e) {
        }
    }

    @Override
    public void surfaceDestroyed(SurfaceHolder holder) {
        if (mCamera != null) {
            mCamera.stopPreview();
            mCamera.release();
            mCamera = null;
        }
    }
}

Answer 1

http://gun0912.tistory.com/55