Get the touch position inside the imageview in android
- by Manikandan
I have a imageview in my activity and I am able to get the position where the user touch the imageview, through onTouchListener. I placed another image where the user touch over that image. I need to store the touch position(x,y), and use it in another activity, to show the tags. I stored the touch position in the first activity. In the first activity, my imageview at the top of the screen. In the second activity its at the bottom of the screen. If I use the position stored from the first acitvity, it place the tag image at the top, not on the imageview, where I previously clicked in the first activity. Is there anyway to get the position inside the imageview.
FirstActivity:
cp.setOnTouchListener(new OnTouchListener() {
@Override
public boolean onTouch(View v, MotionEvent event) {
// TODO Auto-generated method stub
Log.v("touched x val of cap img >>", event.getX() + "");
Log.v("touched y val of cap img >>", event.getY() + "");
x = (int) event.getX();
y = (int) event.getY();
tag.setVisibility(View.VISIBLE);
int[] viewCoords = new int[2];
cp.getLocationOnScreen(viewCoords);
int imageX = x - viewCoords[0]; // viewCoods[0] is the X coordinate
int imageY = y - viewCoords[1]; // viewCoods[1] is the y coordinate
Log.v("Real x >>>",imageX+"");
Log.v("Real y >>>",imageY+"");
RelativeLayout rl = (RelativeLayout) findViewById(R.id.lay_lin);
ImageView iv = new ImageView(Capture_Image.this);
Bitmap bm = BitmapFactory.decodeResource(getResources(),
R.drawable.tag_icon_32);
iv.setImageBitmap(bm);
RelativeLayout.LayoutParams params = new RelativeLayout.LayoutParams(
RelativeLayout.LayoutParams.WRAP_CONTENT, RelativeLayout.LayoutParams.WRAP_CONTENT);
params.leftMargin = x;
params.topMargin = y;
rl.addView(iv, params);
Intent intent= new
Intent(Capture_Image.this,Tag_Image.class);
Bundle b=new Bundle();
b.putInt("xval", imageX);
b.putInt("yval", imageY);
intent.putExtras(b);
startActivity(intent);
return false;
}
});
In TagImage.java I used the following:
im = (ImageView) findViewById(R.id.img_cam22);
b=getIntent().getExtras();
xx=b.getInt("xval");
yy=b.getInt("yval");
im.setOnTouchListener(new OnTouchListener() {
@Override
public boolean onTouch(View v, MotionEvent event) {
int[] viewCoords = new int[2];
im.getLocationOnScreen(viewCoords);
int imageX = xx + viewCoords[0]; // viewCoods[0] is the X coordinate
int imageY = yy+ viewCoords[1]; // viewCoods[1] is the y coordinate
Log.v("Real x >>>",imageX+"");
Log.v("Real y >>>",imageY+"");
RelativeLayout rl = (RelativeLayout) findViewById(R.id.lay_lin);
ImageView iv = new ImageView(Tag_Image.this);
Bitmap bm = BitmapFactory.decodeResource(getResources(),
R.drawable.tag_icon_32);
iv.setImageBitmap(bm);
RelativeLayout.LayoutParams params = new RelativeLayout.LayoutParams(
30, 40);
params.leftMargin =imageX ;
params.topMargin = imageY;
rl.addView(iv, params);
return true;
}
});
