Android Google Map如何检查gps位置是否在圆圈内

您应该使用传入onMyLOCATIOnChange()回调的位置,以便它使用您当前的位置来判断设备是否在圆圈内：

googleMap.setOnMyLOCATIOnchangelistener(new GoogleMap.onMyLOCATIOnchangelistener() {
                @Override
                public void onMyLOCATIOnChange(LOCATIOn LOCATIOn) {
                    float[] distance = new float[2];

                    /*
                    LOCATIOn.distancebetween( mMarker.getPosition().latitude,distancE);
                            */

                    LOCATIOn.distancebetween( LOCATIOn.getLatitude(),LOCATIOn.getLongitude(),distancE);

                    if( distance[0] > mCircle.geTradius() ){
                        Toast.makeText(getBaseContext(),"Outside,distance from center: " + distance[0] + " radius: " + mCircle.geTradius(),Toast.LENGTH_LONG).show();
                    } else {
                        Toast.makeText(getBaseContext(),"Inside,Toast.LENGTH_LONG).show();
                    }

                }
            });

以下是我运行的全部工作示例,它是您的原始代码的缩减版本：

public class MainActivity extends ActionBarActivity {

    private GoogleMap googleMap;
    private serializable escolas;
    private ProgressDialog dialog;
    private Circle mCircle;
    private Marker mMarker;



    @TargetApi(Build.VERSION_CODEs.ICE_CREAM_SANDWICH)
    @Override
    protected void onCreate(Bundle savedInstanceStatE) {
        super.onCreate(savedInstanceStatE);

        getSupportActionBar().setDisplayHomeAsUpEnabled(true);
        getSupportActionBar().setHomeButtonEnabled(true);

        setContentView(R.layout.activity_main);

        // Loading map
        initilizeMap();

        // Changing map type
        googleMap.setMapType(GoogleMap.MAP_TYPE_NORMAL);

        // Showing / hiding your current LOCATIOn
        googleMap.setMyLOCATIOnEnabled(true);

        // Enable / Disable zooming controls
        googleMap.getUiSetTings().setZoomControlsEnabled(true);

        // Enable / Disable my LOCATIOn button
        googleMap.getUiSetTings().setMyLOCATIOnButtonEnabled(true);

        // Enable / Disable Compass icon
        googleMap.getUiSetTings().setCompassEnabled(true);

        // Enable / Disable Rotate gesture
        googleMap.getUiSetTings().setRotateGesturesEnabled(true);

        // Enable / Disable zooming functionality
        googleMap.getUiSetTings().setZoomGesturesEnabled(true);

       // Bundle extra = geTintent().getBundleExtra("extra");
        //ArrayList<Escolas> objects = (ArrayList<Escolas>) extra.getserializable("array");


        try {
               //test outside
               double mLatitude = 37.77657;
               double mLongitude = -122.417506;


                //test inside
                //double mLatitude = 37.7795516;
                //double mLongitude = -122.39292;


                googleMap.moveCamera(CameraupdateFactory.newLatLngZoom(new LatLng(mLatitude,mLongitudE),15));

                MarkerOptions options = new MarkerOptions();

                // SetTing the position of the marker

                options.position(new LatLng(mLatitude,mLongitudE));

                //googleMap = ((SupportMapFragment) getSupportFragmentManager().findFragmentById(R.id.map)).getMap();

                LatLng latLng = new LatLng(mLatitude,mLongitudE);
                drawMarkerWithCircle(latLng);


                googleMap.setOnMyLOCATIOnchangelistener(new GoogleMap.onMyLOCATIOnchangelistener() {
                    @Override
                    public void onMyLOCATIOnChange(LOCATIOn LOCATIOn) {
                        float[] distance = new float[2];

                        /*
                        LOCATIOn.distancebetween( mMarker.getPosition().latitude,distancE);
                                */

                        LOCATIOn.distancebetween( LOCATIOn.getLatitude(),distancE);

                        if( distance[0] > mCircle.geTradius()  ){
                            Toast.makeText(getBaseContext(),Toast.LENGTH_LONG).show();
                        }

                    }
                });




        } catch (Exception E) {
            e.printStackTrace();
        }
    }


    private void drawMarkerWithCircle(LatLng position){
        double radiusInMeters = 500.0;
        int strokeColor = 0xffff0000; //red outline
        int shadeColor = 0x44ff0000; //opaque red fill

        CircLeoptions circLeoptions = new CircLeoptions().center(position).radius(radiusInMeters).fillColor(shadeColor).strokeColor(strokeColor).strokeWidth(8);
        mCircle = googleMap.addCircle(circLeoptions);

        MarkerOptions markerOptions = new MarkerOptions().position(position);
        mMarker = googleMap.addMarker(markerOptions);
    }



    private void initilizeMap() {

        if (googleMap == null) {
            googleMap = ((SupportMapFragment) getSupportFragmentManager().findFragmentById(
                    R.id.map)).getMap();

            // check if map is created successfully or not
            if (googleMap == null) {
                Toast.makeText(getApplicationContext(),menu);

        return super.onCreateOptionsMenu(menu);
    }

    @TargetApi(Build.VERSION_CODEs.HONEYCOMB)
    public Boolean onOptionsItemSELEcted(MenuItem item) {


        switch (item.getItemId()) {

            case android.R.id.home:
                super.onBACkPressed();
                finish();

                return true;


        }

        return true;

    }

    @Override
    protected void onResume() {
        super.onResume();
        initilizeMap();
    }


}

圈内结果：

圆圈外的结果：