Left align My Location button on Google Map Android

Question

I have been trying to left align My Location button on google map as its aligned right by default.

I've seen solution code here, but isn't helped much.

And tried the code following:

SupportMapFragment mapFragment = ((SupportMapFragment)
getChildFragmentManager().findFragmentById(R.id.fragmentMap));
View myLocationButton = mapFragment.getView().findViewById(0x2);

if (myLocationButton != null && myLocationButton.getLayoutParams() instanceof RelativeLayout.LayoutParams) {
    // location button is inside of RelativeLayout
    RelativeLayout.LayoutParams params = (RelativeLayout.LayoutParams) myLocationButton.getLayoutParams();
    params.addRule(RelativeLayout.ALIGN_PARENT_BOTTOM);
    params.addRule(RelativeLayout.ALIGN_PARENT_LEFT);
    params.addRule(RelativeLayout.ALIGN_PARENT_RIGHT, 0);
    params.addRule(RelativeLayout.ALIGN_PARENT_TOP, 0);
    // Update margins, set to 10dp
    final int margin = (int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, 10, getResources().getDisplayMetrics());
    params.setMargins(margin, margin, margin, margin);
    myLocationButton.setLayoutParams(params);
}

Andrii Omelchenko · Accepted Answer · 2018-09-06T06:56:16.877

You should do that in parent.post() method. Try this code:

void myLocationBottomLeftAlign() {
    try {
        mGoogleMap.setMyLocationEnabled(true);
        mGoogleMap.getUiSettings().setMyLocationButtonEnabled(true);
        mGoogleMap.getUiSettings().setZoomControlsEnabled(true);

        final ViewGroup parent = (ViewGroup) mMapFragment.getView().findViewWithTag("GoogleMapMyLocationButton").getParent();
        parent.post(new Runnable() {
            @Override
            public void run() {
                try {
                    Resources r = getResources();
                    int marginPixels = (int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, 20, r.getDisplayMetrics());

                    View mapLocation = mMapFragment.getView().findViewWithTag("GoogleMapMyLocationButton");

                    // create layoutParams, giving it our wanted width and height(important, by default the width is "match parent")
                    RelativeLayout.LayoutParams rlp = new RelativeLayout.LayoutParams(mapLocation.getHeight(),
                            mapLocation.getHeight());
                    // position on top right
                    rlp.addRule(RelativeLayout.ALIGN_PARENT_LEFT);
                    rlp.addRule(RelativeLayout.ALIGN_PARENT_RIGHT, 0);
                    rlp.addRule(RelativeLayout.ALIGN_PARENT_TOP, 0);
                    rlp.addRule(RelativeLayout.ALIGN_PARENT_BOTTOM);
                    //give compass margin
                    rlp.setMargins(marginPixels, marginPixels, marginPixels, marginPixels);
                    mapLocation.setLayoutParams(rlp);

                } catch (Exception ex) {
                    ex.printStackTrace();
                }
            }
        });
    } catch (Exception ex) {
        ex.printStackTrace();
    }
}

call it in onMapReady() and don't forget about location permission:

@Override
public void onMapReady(GoogleMap googleMap) {
    mGoogleMap = googleMap;

    if (android.os.Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
        int locationPermission = ContextCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION);
        if (locationPermission == PackageManager.PERMISSION_GRANTED) {
            myLocationBottomLeftAlign();
        } else {
            // request permission and than call myLocationBottomLeftAlign();

        }
    } else {
        myLocationBottomLeftAlign();
    }
}

It worked but with a minor alteration. Replaced `!=` with `==` in `if (locationPermission != PackageManager.PERMISSION_GRANTED)`. — Lovepreet Singh, Sep 06 '18 at 06:15

Left align My Location button on Google Map Android

1 Answers1