バックグランドでandroid opencv

私はandroidstudioでアプリ開発を行っています。

以下のプログラムは赤い領域を見つけ出し、その中心に点を描画するものです。下の方に書いてあるx,yをテキストとして表示させるにはどうすればいいでしょうか？

java
1
2import android.app.Activity;
3import android.os.Bundle;
4import android.util.Log;
5import android.view.MenuItem;
6import android.view.SurfaceView;
7import android.view.WindowManager;
8import org.opencv.android.BaseLoaderCallback;
9import org.opencv.android.CameraBridgeViewBase;
10import org.opencv.android.LoaderCallbackInterface;
11import org.opencv.android.OpenCVLoader;
12import org.opencv.core.Core;
13import org.opencv.core.CvType;
14import org.opencv.core.Mat;
15import org.opencv.core.MatOfPoint;
16import org.opencv.core.MatOfPoint2f;
17import org.opencv.core.Point;
18import org.opencv.core.RotatedRect;
19import org.opencv.core.Scalar;
20import org.opencv.core.Size;
21import org.opencv.imgproc.Imgproc;
22
23
24import java.util.ArrayList;
25import java.util.List;
26
27
28
29public class MainActivity extends Activity implements CameraBridgeViewBase.CvCameraViewListener {
30    private static final String TAG = "OCVSample::Activity";
31
32    int i =0;
33    double x=0;
34    double y=0;
35
36    private CameraBridgeViewBase mOpenCvCameraView;
37    private boolean mIsJavaCamera = true;
38    private MenuItem mItemSwitchCamera = null;
39
40
41    private BaseLoaderCallback mLoaderCallback = new BaseLoaderCallback(this) {
42        @Override
43        public void onManagerConnected(int status) {
44            switch (status) {
45                // 読み込みが成功したらカメラプレビューを開始
46                case LoaderCallbackInterface.SUCCESS:
47                {
48                    Log.i(TAG, "OpenCV loaded successfully");
49                    mOpenCvCameraView.enableView();
50                } break;
51                default: {
52                    super.onManagerConnected(status);
53                }break;
54            }
55        }
56    };
57
58    public MainActivity() {
59        Log.i(TAG, "Instantiated new " + this.getClass());
60    }
61
62    @Override
63    protected void onCreate(Bundle savedInstanceState) {
64        Log.i(TAG, "called onCreate");
65        super.onCreate(savedInstanceState);
66        getWindow().addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON);
67        setContentView(R.layout.activity_main);
68
69        mOpenCvCameraView = (CameraBridgeViewBase) findViewById(R.id.camera_view);
70
71        mOpenCvCameraView.setVisibility(SurfaceView.INVISIBLE);
72
73        mOpenCvCameraView.setCvCameraViewListener(this);
74    }
75
76    @Override
77    protected void onPause() {
78        super.onPause();
79        if (mOpenCvCameraView != null)
80            mOpenCvCameraView.disableView();
81    }
82
83    @Override
84    protected void onResume() {
85        super.onResume();
86        if (!OpenCVLoader.initDebug()) {
87            Log.d(TAG, "Internal OpenCV library not found. Using OpenCV Manager for initialization");
88            OpenCVLoader.initAsync(OpenCVLoader.OPENCV_VERSION_3_0_0, this, mLoaderCallback);
89        } else {
90            Log.d(TAG, "OpenCV library found inside package. Using it!");
91            mLoaderCallback.onManagerConnected(LoaderCallbackInterface.SUCCESS);
92        }
93    }
94
95
96    @Override
97    protected void onDestroy() {
98        super.onDestroy();
99        if (mOpenCvCameraView != null)
100            mOpenCvCameraView.disableView();
101    }
102
103
104    @Override
105    public void onCameraViewStarted(int width, int height) {// カメラプレビュー開始時に呼ばれる
106    }
107
108    @Override
109    public void onCameraViewStopped() {// カメラプレビュー終了時に呼ばれる
110    }
111
112    @Override
113    public Mat onCameraFrame(Mat inputFrame) {
114        Mat src = inputFrame;
115        Mat src1 = src.clone();
116        Imgproc.cvtColor(src, src, Imgproc.COLOR_RGB2HSV);//HSVに変換
117        Imgproc.medianBlur(src, src, 5);
118        Core.inRange(src, new Scalar(150,100,100),new Scalar(180,255,255),src);
119        Mat hierarchy=Mat.zeros(new Size(5,5), CvType.CV_8UC1);
120        List<MatOfPoint> contours = new ArrayList<MatOfPoint>();
121        Imgproc.findContours(src, contours, hierarchy, Imgproc.RETR_EXTERNAL, Imgproc.CHAIN_APPROX_TC89_L1);
122        //Scalar color=new Scalar(200,20,100);
123       // Imgproc.drawContours(src1, contours, -1, color,10);
124        int i=0;
125        int index = -1;
126        double area = 0;
127        for(i=0;i<contours.size();i++)
128        {
129            double tmp = Imgproc.contourArea(contours.get(i));
130            if (area < tmp) {
131                area = tmp;
132                index = i;
133            }
134        }
135        if (index != -1) {
136            MatOfPoint ptmat= contours.get(index);
137            Scalar color=new Scalar(0,200,0);
138            MatOfPoint2f ptmat2 = new MatOfPoint2f( ptmat.toArray() );
139            RotatedRect bbox=Imgproc.minAreaRect(ptmat2);
140            Point point = bbox.center;
141            x = point.x;
142            y = point.y;
143            Point point2 = new Point(x,y);
144            Imgproc.circle(src1, bbox.center,5, color,-1);
145        }
146        return src1;
147    }
148
149}
150