我有这个问题,我在我的应用程序中使用GPS来获取经度和纬度,当我想要返回主页时图标GPS始终从我的移动设备顶部显示,我如何在返回主屏幕后关闭它< / p>
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");
}
}
答案 0 :(得分:3)
在onPause()
的{{1}}上使用此代码。
Activity
答案 1 :(得分:1)
启用和禁用GPS取决于用户。您可以向他显示一个对话框,通知他关于禁用GPS的信息。在这种情况下,在对话框上保留两个按钮 - 一个用于“设置”,另一个用于“确定”或“取消”。
public static void promptForGPS(
final Activity activity)
{
final AlertDialog.Builder builder =
new AlertDialog.Builder(activity);
final String action = Settings.ACTION_LOCATION_SOURCE_SETTINGS;
final String message = "Disable GPS....Message here"
+ " Click OK to go to"
+ " location services settings to let you do so.";
builder.setMessage(message)
.setPositiveButton("OK",
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface d, int id) {
activity.startActivity(new Intent(action));
d.dismiss();
}
})
.setNegativeButton("Cancel",
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface d, int id) {
d.cancel();
}
});
builder.create().show();
}
答案 2 :(得分:0)
我找到的最好的是
onResume()
{
// Request for GPS Location
//location.requestLocationUpdates()
}
和
onPause()
{
// Remove location
// location.removeUpdates()
}
通过调用removeUpdates()方法,只要您的Activity不在forground中,它就会停止GPS。通过这种方式,您可以停止GPS以及停止耗尽电池。
答案 3 :(得分:0)
当您的应用进入后台时,您需要告诉LocationManager您不再需要位置更新
locationManager.removeUpdates(this);
在你的onPause()方法中。
你也应该将你的电话转移到
locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 0, 0, this);
到onResume();这样一旦您重新进入应用程序,位置更新将恢复。