Pass data of touch event from custom view to activity android

Question

How do I pass data from custom view to parent activity? I've data of which box is touched in the custom view. I want to pass that data to the parent activity whenever a box is touched.

Here's my activity layout: 1

Edit: Here's parent activity:

<RelativeLayout
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:visibility="invisible">
    <SearchView
        android:id="@+id/searchView"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_centerHorizontal="true"
        >
    </SearchView>
</RelativeLayout>
<com.example.gaurav.dummyapp.FaceOverlayView
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/face_overlay"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    />

FaceOverlayView.java

public class FaceOverlayView extends View {

private Bitmap mBitmap;
private SparseArray<Face> mFaces;
float left = 0;
float top = 0;
float right = 0;
float bottom = 0;
double sc;
private String faceData;

public FaceOverlayView(Context context) {
    this(context, null);
}

public FaceOverlayView(Context context, AttributeSet attrs) {
    this(context, attrs, 0);
}

public FaceOverlayView(Context context, AttributeSet attrs, int defStyleAttr) {
    super(context, attrs, defStyleAttr);
}

public void setBitmap( Bitmap bitmap ) {
    mBitmap = bitmap;
    FaceDetector detector = new FaceDetector.Builder( getContext() )
            .setTrackingEnabled(true)
            .setLandmarkType(FaceDetector.ALL_LANDMARKS)
            .setMode(FaceDetector.ACCURATE_MODE)
            .build();

    if (!detector.isOperational()) {
        //Handle contingency
    } else {
        Frame frame = new Frame.Builder().setBitmap(bitmap).build();
        mFaces = detector.detect(frame);
        detector.release();
    }
    logFaceData();
    invalidate();
}

@Override
protected void onDraw(Canvas canvas) {
    super.onDraw(canvas);

    if ((mBitmap != null) && (mFaces != null)) {
        double scale = drawBitmap(canvas);
        drawFaceBox(canvas, scale);

    }
}

private double drawBitmap(Canvas canvas) {
    double viewWidth = canvas.getWidth();
    double viewHeight = canvas.getHeight();
    double imageWidth = mBitmap.getWidth();
    double imageHeight = mBitmap.getHeight();
    double scale = Math.min(viewWidth / imageWidth, viewHeight / imageHeight);
    sc = scale;
    Rect destBounds = new Rect(0, 0, (int)(imageWidth * scale), (int)(imageHeight * scale));
    canvas.drawBitmap(mBitmap, null, destBounds, null);
    return scale;
}

private void drawFaceBox(Canvas canvas, double scale) {
    //This should be defined as a member variable rather than
    //being created on each onDraw request, but left here for
    //emphasis.
    Paint paint = new Paint();
    paint.setColor(Color.GREEN);
    paint.setStyle(Paint.Style.STROKE);
    paint.setStrokeWidth(5);



    for( int i = 0; i < mFaces.size(); i++ ) {
        Face face = mFaces.valueAt(i);

        left = (float) ( face.getPosition().x * scale );
        top = (float) ( face.getPosition().y * scale );
        right = (float) scale * ( face.getPosition().x + face.getWidth() );
        bottom = (float) scale * ( face.getPosition().y + face.getHeight() );

        canvas.drawRect( left, top, right, bottom, paint );
    }
}

private void drawFaceLandmarks(Canvas canvas, double scale ) {
    Paint paint = new Paint();
    paint.setColor( Color.GREEN );
    paint.setStyle( Paint.Style.STROKE );
    paint.setStrokeWidth( 5 );

    for( int i = 0; i < mFaces.size(); i++ ) {
        Face face = mFaces.valueAt(i);

        for ( Landmark landmark : face.getLandmarks() ) {
            int cx = (int) ( landmark.getPosition().x * scale );
            int cy = (int) ( landmark.getPosition().y * scale );
            canvas.drawCircle( cx, cy, 10, paint );
        }

    }
}

private void logFaceData() {
    float smilingProbability;
    float leftEyeOpenProbability;
    float rightEyeOpenProbability;
    float eulerY;
    float eulerZ;
    for( int i = 0; i < mFaces.size(); i++ ) {
        Face face = mFaces.valueAt(i);

        smilingProbability = face.getIsSmilingProbability();
        leftEyeOpenProbability = face.getIsLeftEyeOpenProbability();
        rightEyeOpenProbability = face.getIsRightEyeOpenProbability();
        eulerY = face.getEulerY();
        eulerZ = face.getEulerZ();

        Log.e( "Face Detection", "Smiling: " + smilingProbability );
        Log.e( "Face Detection", "Left eye open: " + leftEyeOpenProbability );
        Log.e( "Face Detection", "Right eye open: " + rightEyeOpenProbability );
        Log.e( "Face Detection", "Euler Y: " + eulerY );
        Log.e( "Face Detection", "Euler Z: " + eulerZ );
    }
}

@Override
public boolean onTouchEvent(MotionEvent event) {
    int action = event.getAction() & MotionEvent.ACTION_MASK;

    int x = (int) event.getX();
    int y = (int) event.getY();
    float eulerY;
    float eulerZ;
    switch(action) {
        case MotionEvent.ACTION_DOWN : {
            for( int i = 0; i < mFaces.size(); i++ ) {
                Face face = mFaces.valueAt(i);

                left = (float) ( face.getPosition().x * sc );
                top = (float) ( face.getPosition().y * sc );
                right = (float) sc * ( face.getPosition().x + face.getWidth() );
                bottom = (float) sc * ( face.getPosition().y + face.getHeight() );

                if((x > left && x < right) && (y > top && y < bottom)){
                    Log.e("BOX>>>>>>>>>>", String.valueOf(i));

                }
            }


            break;
        }
        case MotionEvent.ACTION_MOVE : {
            //path.lineTo(event.getX(), event.getY());

            break;
        }

    }

    invalidate();

    return super.onTouchEvent(event);
}

Activity Class: public class dummyActivity extends AppCompatActivity {

private FaceOverlayView fooView;


@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_dummy);
    fooView.setBitmap("bitmap");
}

Answer 1

i think what you need is onTouchListenter on the parent activity

box_view.setOnTouchListener(new OnTouchListener() {
    @Override
    public boolean onTouch(View v, MotionEvent event) {
        if(event.getAction() == MotionEvent.ACTION_UP){

            // Do what you want/Get data from view etc... depends what kind of data it is, can you explain more?
            return true;
        }
        return false;
    }
});

i think you have a textfield inside the box that hold the integer value, so you do inside the onTouch

    tv_box_1.getText(); 
//To get the text of the box1 (do for tv_box_2.getText) etc...
//after that just convert to integer
Integer.parseInt(tv_box_1.getText());

you can do another way, implementing the touch inside the parent and handle the touch, doing some ifs to check the View id and handle that

another way and easier is to give the TextView inside the box the match_parent for both direction and set the onClick, its the easier, you should use this one if you dont really need the touch