Question

我试图获取位置信息。我需要经度和纬度。

我正在使用手机运行和调试。其4.4.2。

我的AndroidManifest文件：

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.peylx.brstpcu.voteapp">
    <uses-permission android:name="android.permission.INTERNET" />
    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
    <uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />
    <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
    <uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
    <application
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:supportsRtl="true"
        android:theme="@style/AppTheme">

        <activity android:name=".MainActivity">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
        <activity
            android:name=".HomeActivity"
            android:label="@string/title_activity_home"
            android:theme="@style/AppTheme.NoActionBar"></activity>
    </application>

</manifest>

我的活动

package com.peylx.brstpcu.voteapp;

import android.Manifest;
import android.content.Context;
import android.content.Intent;
import android.content.pm.PackageManager;
import android.location.Criteria;
import android.location.Location;
import android.location.LocationListener;
import android.location.LocationManager;
import android.media.audiofx.BassBoost;
import android.os.Build;
import android.os.Bundle;
import android.provider.Settings;
import android.support.annotation.NonNull;
import android.support.v4.app.ActivityCompat;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.ListView;
import android.widget.Toast;

import java.util.ArrayList;


public class HomeActivity extends AppCompatActivity {


    private LocationManager locationManager;
    private LocationListener locationListener;
    private double latitude;
    private double longitude;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_home);
        Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
        setSupportActionBar(toolbar);



        locationManager = (LocationManager) getSystemService(LOCATION_SERVICE);
        locationListener = new LocationListener() {
            @Override
            public void onLocationChanged(Location location) {
                latitude = location.getLatitude();
                longitude = location.getLongitude();
                Toast.makeText(getApplicationContext(),"Latitude = " + Double.toString(latitude) + "Longitude = " + Double.toString(longitude),Toast.LENGTH_LONG).show();
            }

            @Override
            public void onStatusChanged(String provider, int status, Bundle extras) {

            }

            @Override
            public void onProviderEnabled(String provider) {

            }

            @Override
            public void onProviderDisabled(String provider) {
                Intent settingsIntent = new Intent(Settings.ACTION_LOCATION_SOURCE_SETTINGS);
                startActivity(settingsIntent);
            }
        };
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
            if (ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {

                requestPermissions(new String[]{
                        Manifest.permission.ACCESS_FINE_LOCATION, Manifest.permission.ACCESS_COARSE_LOCATION, Manifest.permission.INTERNET
                }, 10);

                return;
            }
        } else {
            configureButton();
        }

    }

    @Override
    public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
        super.onRequestPermissionsResult(requestCode, permissions, grantResults);
        switch (requestCode){
            case 10:
                if (grantResults.length>0 && grantResults[0] == PackageManager.PERMISSION_GRANTED)
                    configureButton();
                return;
        }

    }

    private void configureButton(){
                locationManager.requestLocationUpdates("gps", 5000, 0, locationListener);

    }
}

当我尝试调试我的程序时，它没有onLocationChanged()方法。所以我无法收到Toast消息。

可以采取哪些措施来解决这个问题？

Answer 1

试试这个 -

1）在HomeActivity中实现OnMyLocationChangeListener。

2）复制foll。方法 -

private Location getMyLocation() {
        LocationManager lm = (LocationManager)getSystemService(Context.LOCATION_SERVICE);
        Location myLocation = lm.getLastKnownLocation(LocationManager.GPS_PROVIDER);


        // if Location wasn't found
        if (myLocation == null) {
            Criteria criteria = new Criteria();
            criteria.setAccuracy(Criteria.ACCURACY_COARSE);

            String provider = lm.getBestProvider(criteria, true);
            // Use the provider to get the last known location
            myLocation = lm.getLastKnownLocation(provider);
            double lat1 = myLocation.getLatitude();
            double lng1 = myLocation.getLongitude();
            Toast.makeText(HomeActivity.this,"Latitude = " + lat1 + "Longitude = " + lng1,Toast.LENGTH_LONG).show();
        }

        return myLocation;
    }

3）在onCreate（）

中调用getMyLocation（）方法

它对我有用：）

注意： OnMyLocationChangeListener已弃用（请查看Google文档）

Answer 2

尝试以下代码：

从OnCreate（）方法调用checkLocation（）方法：

    System.setProperty("http.proxyHost", "191.1.1.123");
    System.setProperty("http.proxyPort", "8080");

Answer 3

首先，您的活动应实现LocationListener

public class HomeActivity extends AppCompatActivity implements LocationListener{


private LocationManager locationManager;
private LocationListener locationListener;
private double latitude;
private double longitude;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_home);
    Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
    setSupportActionBar(toolbar);



    locationManager = (LocationManager) getSystemService(LOCATION_SERVICE);
    locationListener = new LocationListener() {
        @Override
        public void onLocationChanged(Location location) {
            latitude = location.getLatitude();
            longitude = location.getLongitude();
            Toast.makeText(getApplicationContext(),"Latitude = " + Double.toString(latitude) + "Longitude = " + Double.toString(longitude),Toast.LENGTH_LONG).show();
        }

        @Override
        public void onStatusChanged(String provider, int status, Bundle extras) {

        }

        @Override
        public void onProviderEnabled(String provider) {

        }

        @Override
        public void onProviderDisabled(String provider) {
            Intent settingsIntent = new Intent(Settings.ACTION_LOCATION_SOURCE_SETTINGS);
            startActivity(settingsIntent);
        }
    };
    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
        if (ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {

            requestPermissions(new String[]{
                    Manifest.permission.ACCESS_FINE_LOCATION, Manifest.permission.ACCESS_COARSE_LOCATION, Manifest.permission.INTERNET
            }, 10);

            return;
        }
    } else {
        configureButton();
    }

}

@Override
public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
    super.onRequestPermissionsResult(requestCode, permissions, grantResults);
    switch (requestCode){
        case 10:
            if (grantResults.length>0 && grantResults[0] == PackageManager.PERMISSION_GRANTED)
                configureButton();
            return;
    }

}

private void configureButton(){
            locationManager.requestLocationUpdates("gps", 5000, 0, locationListener);

    }
}

无法获得纬度和经度

3 个答案: