安卓如何在按返回键回到主屏幕后关闭gps图标？

Gulan 发表于 Dev

可能

我有这个问题，当我想返回首页时，我从应用程序中使用GPS来获取经度和纬度。图标GPS总是从移动设备的顶部显示，如何在返回主屏幕后将其关闭

在此处输入图片说明我的代码。

public class doctorlocation extends Activity implements LocationListener {
    protected LocationManager locationManager;
    protected LocationListener locationListener;
    protected Context context;
    String lat;
    String provider;
    protected double latitude,longitude; 
    protected boolean gps_enabled,network_enabled;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.doctorlocation);
        locationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
        locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 0, 0, this);   
    }

        @Override
    public void onLocationChanged(Location location) {
     //txtLat = (TextView) findViewById(R.id.textview1);

    //txtLat.setText("Latitude:" + location.getLatitude() + ", Longitude:" + location.getLongitude());
    String str = "Latitude: "+location.getLatitude()+" \nLongitude: "+location.getLongitude();
    Toast.makeText(getBaseContext(), str, Toast.LENGTH_LONG).show();

    latitude=location.getLatitude();

    longitude=location.getLongitude();

    }

    @Override
    public void onProviderDisabled(String provider) {
     Log.d("Latitude","disable");

        Toast.makeText(getBaseContext(), "Gps turned off ", Toast.LENGTH_LONG).show();

    }

    @Override
    public void onProviderEnabled(String provider) {
     Log.d("Latitude","enable");

    Toast.makeText(getBaseContext(), "Gps turned on ", Toast.LENGTH_LONG).show();

    }

    @Override
    public void onStatusChanged(String provider, int status, Bundle extras) {
    Log.d("Latitude","status");
    }

      }

阿姆雷什·辛格（Amresh Singh）

在使用这个代码onPause()的那个Activity。

 @Override
    protected void onPause() {
    Log.i("onPause", "inside onPause");
    super.onPause();
    locationManager.removeUpdates(myLocationListener);//locationManager.removeUpdates(this) ;
    locationManager = null;
    }

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