API 23及之后版本关于用android studio 中LocationManager的方法使用
16lz
2021-01-23
package com.example.administrator.locationtest;import android.app.Activity;import android.content.Context;import android.content.pm.PackageManager;import android.location.Location;import android.location.LocationListener;import android.location.LocationManager;import android.os.Bundle;import android.support.v4.content.ContextCompat;import android.widget.TextView;import android.widget.Toast;import org.w3c.dom.Text;import java.util.List;import java.util.jar.Manifest;/** * Created by Administrator on 2016/4/8. */public class MainActivity extends Activity{ private TextView positionTextView; private LocationManager locationManager; private String provider; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); positionTextView=(TextView)findViewById(R.id.position_text_view); locationManager=(LocationManager)getSystemService(Context.LOCATION_SERVICE); if(ContextCompat.checkSelfPermission(this,android.Manifest.permission.ACCESS_FINE_LOCATION)== PackageManager.PERMISSION_GRANTED){
//此处的判定是主要问题,API23之后需要先判断之后才能调用locationManager中的方法
//包括这里的getLastKnewnLocation方法和requestLocationUpdates方法 Location location=locationManager.getLastKnownLocation(LocationManager.GPS_PROVIDER); if(location!=null){ showLocation(location); } locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER,5000,10,locationListener); } } @Override protected void onDestroy() { super.onDestroy(); if(ContextCompat.checkSelfPermission(this,android.Manifest.permission.ACCESS_FINE_LOCATION)== PackageManager.PERMISSION_GRANTED){
//此处同样需要判定之后才能调用removeUpdates方法 if(locationManager!=null){ locationManager.removeUpdates(locationListener); } } } LocationListener locationListener=new LocationListener() { @Override public void onLocationChanged(Location location) { showLocation(location); } @Override public void onStatusChanged(String provider, int status, Bundle extras) { } @Override public void onProviderEnabled(String provider) { } @Override public void onProviderDisabled(String provider) { } }; private void showLocation(Location location){ String currentPosition="latitude is"+location.getLatitude()+"\n"+"longitude is"+location.getLongitude(); positionTextView.setText(currentPosition); }}
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