在Android进行手机设置时，会出现GPS关闭的情况，这时应该弹出一个窗口提示用户开启GPS，然后开启后重启定位监听。

提示窗口：

 private void openGPS() {        new AlertDialog.Builder(MapActivity.this)                .setIcon(android.R.drawable.ic_dialog_info)                .setTitle(R.string.information)                .setMessage("没有开启定位")                .setNegativeButton(R.string.cancel,null)                .setPositiveButton(R.string.open, new DialogInterface.OnClickListener() {                    @Override                    public void onClick(DialogInterface dialogInterface, int i) {                        Intent intent = new Intent(Settings.ACTION_LOCATION_SOURCE_SETTINGS);                        startActivityForResult(intent,887);                        dialogInterface.dismiss();                    }                })                .show();    }

开启监听：

private void startLocation() {        Log.e(Tag, "开始定位");        locationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE);        Criteria criteria = new Criteria();        //ACCURACY_HIGH/ACCURACY_LOW精度选择        criteria.setAccuracy(Criteria.ACCURACY_FINE);        //高度        criteria.setAltitudeRequired(true);        //方位信息        criteria.setBearingRequired(true);        //是否允许付费        criteria.setCostAllowed(true);        //对电量的要求        criteria.setPowerRequirement(Criteria.POWER_LOW);        //速度        criteria.setSpeedRequired(true);        String locationProvider = locationManager.getBestProvider(criteria, true);        Log.e(Tag, locationProvider);        if (ActivityCompat.checkSelfPermission(MapActivity.this, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(MapActivity.this, Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {            ActivityCompat.requestPermissions(MapActivity.this, new String[]{Manifest.permission.ACCESS_FINE_LOCATION, Manifest.permission.ACCESS_COARSE_LOCATION}, 0);        } else {            locationListener = new locateListener();            locationManager.requestLocationUpdates(locationProvider, 1000, 1, locationListener);            Log.e(Tag, "开始监听");        }    }

结果返回：

 protected void onActivityResult(int requestCode, int resultCode, Intent data) {        switch(requestCode){            case 887:                //开启GPS，重新添加地理监听                startLocation();                break;            default:break;        }        super.onActivityResult(requestCode, resultCode, data);    }

Android手机定位未开启，跳转到GPS开启页面

提示窗口：

开启监听：

结果返回：

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