Get the center coordinates of phone screen

Question

Can someone give me an example of how to get the center coordinates of the current displayed screen? I would like my objects to always be relative to the center coordinates of the active view.

Do you want coordinates or why can't you use center gravity? — OneCricketeer, Jun 08 '16 at 16:46
@cricket_007 I'm open to any suggestions, I am new to android app development. I have an iOS app that does it, but I'm interested in the least complex equivalent for android. — 1QuickQuestion, Jun 08 '16 at 17:15
Assuming you just want to center a view, see here http://stackoverflow.com/questions/1499258/how-to-center-a-view-inside-of-an-android-layout — OneCricketeer, Jun 08 '16 at 17:17
@cricket_007 I really want the coordinate. I am moving an object about the x-axis; so I want to keep it within a certain range +/-[some value] of the screen center x-coordinate. — 1QuickQuestion, Jun 08 '16 at 17:34
[Get the screen dimensions](http://stackoverflow.com/questions/6520718/how-to-get-screen-width-and-height) and divide by 2, then? — OneCricketeer, Jun 08 '16 at 17:38
@cricket_007 Your solution worked, do you want to post it as an answer so I can accept it? Thanks a lot! — 1QuickQuestion, Jun 09 '16 at 14:05

score 12 · Accepted Answer · edited Oct 15 '17 at 18:33

12

You can try with `DisplayMetrics` to achieve your solution

int mWidth= this.getResources().getDisplayMetrics().widthPixels;
int mHeight= this.getResources().getDisplayMetrics().heightPixels;

edited Oct 15 '17 at 18:33

cora32

388
3
15

answered Nov 21 '16 at 06:25

Devrath

42,072
54
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Probably this doesn't give you full height if keyboard is open. – PK Gupta May 08 '19 at 10:50
1

@Gupta , one simple solution for that would setting the activity to never resize with keyboard (in the manifest) – Nasib Nov 19 '19 at 07:09

score 1 · Answer 2 · answered Aug 18 '17 at 04:19

Here is how I resolved the issue. As a background, I have a button that once the user moves the map to the desired location (cross hairs showing the centre of map) they can tap the button and a marker appears in the centre of the map.

findViewById(R.id.addMarker).setOnClickListener(
            new View.OnClickListener(){
                @Override
                public  void onClick(View view) {
                    if(myMap != null){
                        double myLat = myMap.getCameraPosition().target.latitude;
                        double myLng = myMap.getCameraPosition().target.longitude;
                        LatLng markerPoint = new LatLng(myLat, myLng);
                        myMap.addMarker(new MarkerOptions().position(markerPoint)).setTitle("new marker");
                    }
                }
            }
    );

score 1 · Answer 3 · answered Aug 21 '17 at 14:54

1

int cx =screenHeight = displaymetrics.heightPixels; int cy = screenWidth = displaymetrics.widthPixels; float finalRadius = (float) Math.sqrt(cx * cx + cy * cy);

float is the center if the object

answered Aug 21 '17 at 14:54

Waqar Khan

42
6

Get the center coordinates of phone screen

3 Answers3

You can try with `DisplayMetrics` to achieve your solution

Linked

Get the center coordinates of phone screen

3 Answers3

You can try with DisplayMetrics to achieve your solution

Linked

You can try with `DisplayMetrics` to achieve your solution