Android:FusedLocationProvider,每隔几秒获取一次位置
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【中文标题】Android:FusedLocationProvider,每隔几秒获取一次位置【英文标题】:Android: FusedLocationProvider, get location every few seconds 【发布时间】:2019-11-25 02:41:27 【问题描述】:我正在制作一个应用程序来跟踪用户的位置并最终将其上传到 Firebase 服务器。
我创建了一个简单的应用程序,当我按下屏幕上的按钮时会显示位置。问题是当我走了几米后再次按下它时它不会改变位置(但当我重新进入应用程序时我确实得到了一个新位置)。为了让应用每 X 秒更新一次位置,我需要添加什么?这是我的活动:
package com.example.gpstest;
import android.content.pm.PackageManager;
import android.location.Location;
import android.support.v4.app.ActivityCompat;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;
import com.google.android.gms.location.FusedLocationProviderClient;
import com.google.android.gms.location.LocationServices;
import com.google.android.gms.tasks.OnSuccessListener;
import static android.Manifest.permission.ACCESS_FINE_LOCATION;
public class MainActivity extends AppCompatActivity
private FusedLocationProviderClient client;
@Override
protected void onCreate(Bundle savedInstanceState)
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
requestPermission();
client = LocationServices.getFusedLocationProviderClient(this);
Button button = findViewById(R.id.getLocation);
button.setOnClickListener(new View.OnClickListener()
@Override
public void onClick(View v)
if (ActivityCompat.checkSelfPermission(MainActivity.this, ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED )
return;
client.getLastLocation().addOnSuccessListener(MainActivity.this, new OnSuccessListener<Location>()
@Override
public void onSuccess(Location location)
if(location != null)
TextView lat = findViewById(R.id.location1);
TextView lon = findViewById(R.id.location2);
TextView alt = findViewById(R.id.location3);
lat.setText(Double.toString(location.getLatitude()));
lon.setText(Double.toString(location.getLongitude()));
alt.setText(Double.toString(location.getAltitude()));
);
);
private void requestPermission()
ActivityCompat.requestPermissions(this, new String[]ACCESS_FINE_LOCATION, 1);
【问题讨论】:
你可以查看这个here的答案。 【参考方案1】:因为您从 getLastLocation 获取位置。为此,您必须实现 LocationCallback。
consider this link了解更多信息
【讨论】:
【参考方案2】:// 在你的类中实现这些接口 GoogleApiClient.ConnectionCallbacks、GoogleApiClient.OnConnectionFailedListener、LocationListener。 //比使用这个代码
public void onConnected(Bundle bundle)
Location mLastLocation = null;
if (mGoogleApiClient.isConnected())
if (ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED)
// ActivityCompat#requestPermissions
// here to request the missing permissions, and then overriding
// public void onRequestPermissionsResult(int requestCode, String[] permissions,
// int[] grantResults)
// to handle the case where the user grants the permission. See the documentation
// for ActivityCompat#requestPermissions for more precise.
return;
mLastLocation = LocationServices.FusedLocationApi.getLastLocation(
mGoogleApiClient);
if (mLastLocation != null)
latLng = new LatLng(mLastLocation.getLatitude(), mLastLocation.getLongitude());
mLocationRequest = new LocationRequest();
mLocationRequest.setInterval(5000); //5 seconds
mLocationRequest.setFastestInterval(3000); //3 seconds
mLocationRequest.setPriority(LocationRequest.PRIORITY_BALANCED_POWER_ACCURACY);
//mLocationRequest.setSmallestDisplacement(0.1F); //1/10 meter
LocationServices.FusedLocationApi.requestLocationUpdates(mGoogleApiClient, mLocationRequest, this);
else
buildGoogleApiClient();
mGoogleApiClient.connect();
【讨论】:
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