实时显示GPS位置

Question

目标：
坐标应实时显示在屏幕上，无需按下按钮。

问题：
要从gps显示当前位置，您必须按下按钮。 是否可以在不按下按钮的情况下实时显示屏幕中的值？

的信息：
*源代码的基础来自page *今天，我是机器人的新手 *此代码从gps硬件而不是谷歌地图API中检索gps坐标。

谢谢！

android manifest

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/activity_main"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context="exceptionbound.com.gpslocation.MainActivity">

    <ScrollView
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_alignParentEnd="true"
        android:layout_alignParentRight="true"
        android:layout_below="@+id/button">

        <TextView
            android:id="@+id/textView"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_alignParentLeft="true"
            android:layout_alignParentStart="true"
            android:layout_below="@+id/button"
            android:gravity="center"
            android:text="Coordinates: "
            android:textSize="30sp" />
    </ScrollView>


    <Button
        android:id="@+id/button"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_centerHorizontal="true"
        android:layout_centerVertical="true"
        android:text="Request Location" />


</RelativeLayout>

activity_main.xml中

package com.jfdimarzio.test_gps_1;

import android.Manifest;
import android.content.Intent;
import android.content.pm.PackageManager;
import android.location.Location;
import android.location.LocationListener;
import android.location.LocationManager;
import android.os.Build;
import android.os.Bundle;
import android.provider.Settings;
import android.support.annotation.NonNull;
import android.support.annotation.Nullable;
import android.support.v4.app.ActivityCompat;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;

public class MainActivity extends AppCompatActivity
{
    private Button button;
    private TextView textView;
    private LocationManager locationManager;
    private LocationListener listener;

    @Override
    protected void onCreate(@Nullable Bundle savedInstanceState)
    {
        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_main);

        textView = (TextView) findViewById(R.id.textView);
        button = (Button) findViewById(R.id.button);

        locationManager = (LocationManager) getSystemService(LOCATION_SERVICE);


        listener = new LocationListener() {
            @Override
            public void onLocationChanged(Location location) {
                textView.append("\n " + location.getLongitude() + " " + location.getLatitude());
            }

            @Override
            public void onStatusChanged(String s, int i, Bundle bundle) {

            }

            @Override
            public void onProviderEnabled(String s) {

            }

            @Override
            public void onProviderDisabled(String s) {

                Intent i = new Intent(Settings.ACTION_LOCATION_SOURCE_SETTINGS);
                startActivity(i);
            }
        };


        configure_button();
    }



    @Override
    public void onRequestPermissionsResult(
            int requestCode,
            @NonNull String[] permissions,
            @NonNull int[] grantResults)
    {
        switch (requestCode)
        {
            case 10:
                configure_button();
                break;
            default:
                break;
        }
    }


    void configure_button()
    {
        // first check for permissions
        if (ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) !=
                PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(this,
                Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED)
        {
            if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M)
            {
                requestPermissions(new String[]{Manifest.permission.ACCESS_COARSE_LOCATION,
                                Manifest.permission.ACCESS_FINE_LOCATION, Manifest.permission.INTERNET}
                        , 10);
            }

            return;
        }
        // this code won'textView execute IF permissions are not allowed, because in the line above there is return statement.
        button.setOnClickListener(new View.OnClickListener()
        {
            @Override
            public void onClick(View view) {
                //noinspection MissingPermission
                locationManager.requestLocationUpdates("gps", 5000, 0, listener);
            }
        });
    }




}

MainActivity

eq = 1