我正在使用与Pokemon Go类似的Kotlin语言开发Android App， 应用程序中没有问题但是当我在手机中安装它时，只显示一个空白地图并且该人没有去我的位置我该如何解决？
MapsActivity.tkt
SB=''
import random
N1=[0 for x in range(5)]
for i in range(5):
N1[i]=random.randrange(1, 13)
N2=[0 for x in range(5)]
for i in range(5):
N2[i]=random.randrange(5, 16)
ANS=[0 for x in range(5)]
C=[0 for x in range(5)]
for i in range(5):
C[i]=N1[i]*N2[i]
print(N1[i],'x',N2[i])
ANS[i]=int(input('Enter an Anwser:'))
if ANS[i]==C[i]:
print('Correct')
elif ANS[i]!=C[i]:
print('Incorrect')
print(SB)
print('Correct Anwsers')
for i in range(5):
if ANS[i]==C[i]:
print(N1[i],'x',N2[i], '=', ANS[i])
print('Incorrect Anwsers')
for i in range(5):
if ANS[i]==C[i]:
print(N1[i],'x',N2[i],'=',ANS[i])
Pockemon.tkt
package ahmedchtn.pockemontn
import android.content.Context
import android.content.pm.PackageManager
import android.location.Location
import android.location.LocationListener
import android.location.LocationManager
import android.os.Build
import android.support.v4.app.FragmentActivity
import android.os.Bundle
import android.support.v4.app.ActivityCompat
import android.widget.Toast
import com.google.android.gms.maps.CameraUpdateFactory
import com.google.android.gms.maps.GoogleMap
import com.google.android.gms.maps.OnMapReadyCallback
import com.google.android.gms.maps.SupportMapFragment
import com.google.android.gms.maps.model.BitmapDescriptor
import com.google.android.gms.maps.model.BitmapDescriptorFactory
import com.google.android.gms.maps.model.LatLng
import com.google.android.gms.maps.model.MarkerOptions
class MapsActivity : FragmentActivity(), OnMapReadyCallback {
//WORK WITH USER LOCATION
private var mMap: GoogleMap? = null
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setContentView(R.layout.activity_maps)
// Obtain the SupportMapFragment and get notified when the map is ready to be used.
val mapFragment = supportFragmentManager
.findFragmentById(R.id.map) as SupportMapFragment
mapFragment.getMapAsync(this)
checkPermmison()
LoadPockemon()
}
var ACCESSLOCATION = 123
fun checkPermmison() {
if (Build.VERSION.SDK_INT >= 23) {
if (ActivityCompat.
checkSelfPermission(this,
android.Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
requestPermissions(arrayOf(android.Manifest.permission.ACCESS_FINE_LOCATION), ACCESSLOCATION)
return
}
}
GetUserLocation()
}
fun GetUserLocation() {
Toast.makeText(this, "User location access on", Toast.LENGTH_LONG).show()
//TODO: Will implement later
var myLocation = MylocationListener()
var locationManager = getSystemService(Context.LOCATION_SERVICE) as LocationManager
locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 3, 3f, myLocation)
var mythread = myThread()
mythread.start()
}
override fun onRequestPermissionsResult(requestCode: Int, permissions: Array<out String>, grantResults: IntArray) {
when (requestCode) {
ACCESSLOCATION -> {
if (grantResults[0] == PackageManager.PERMISSION_GRANTED) {
GetUserLocation()
} else {
Toast.makeText(this, "We cannot access to your location", Toast.LENGTH_LONG).show()
}
}
}
super.onRequestPermissionsResult(requestCode, permissions, grantResults)
}
/**
* Manipulates the map once available.
* This callback is triggered when the map is ready to be used.
* This is where we can add markers or lines, add listeners or move the camera. In this case,
* we just add a marker near Sydney, Australia.
* If Google Play services is not installed on the device, the user will be prompted to install
* it inside the SupportMapFragment. This method will only be triggered once the user has
* installed Google Play services and returned to the app.
*/
override fun onMapReady(googleMap: GoogleMap) {
mMap = googleMap
}
var location: Location? = null
//Get user location
inner class MylocationListener : LocationListener {
constructor() {
location = Location("Start")
location!!.longitude = 0.0
location!!.longitude = 0.0
}
override fun onLocationChanged(p0: Location?) {
location = p0
}
override fun onStatusChanged(p0: String?, p1: Int, p2: Bundle?) {
//TODO("not implemented") //To change body of created functions use File | Settings | File Templates.
}
override fun onProviderEnabled(p0: String?) {
// TODO("not implemented") //To change body of created functions use File | Settings | File Templates.
}
override fun onProviderDisabled(p0: String?) {
//TODO("not implemented") //To change body of created functions use File | Settings | File Templates.
}
}
var oldLocation: Location? = null
inner class myThread : Thread {
constructor() : super() {
oldLocation = Location("Start")
oldLocation!!.longitude = 0.0
oldLocation!!.longitude = 0.0
}
override fun run() {
while (true) {
try {
if (oldLocation!!.distanceTo(location) == 0f) {
continue
}
oldLocation = location
runOnUiThread {
mMap!!.clear()
// show me
val sydney = LatLng(location!!.latitude, location!!.longitude)
mMap!!.addMarker(MarkerOptions()
.position(sydney)
.title("Me")
.snippet(" here is my location")
.icon(BitmapDescriptorFactory.fromResource(R.drawable.naruto)))
mMap!!.moveCamera(CameraUpdateFactory.newLatLngZoom(sydney, 14f))
// show pockemons
for (i in 0..listPockemons.size - 1) {
var newPockemon = listPockemons[i]
if (newPockemon.IsCatch == false) {
val pockemonLoc = LatLng(newPockemon.location!!.latitude, newPockemon.location!!.longitude)
mMap!!.addMarker(MarkerOptions()
.position(pockemonLoc)
.title(newPockemon.name!!)
.snippet(newPockemon.des!! + ", power:" + newPockemon!!.power)
.icon(BitmapDescriptorFactory.fromResource(newPockemon.image!!)))
if (location!!.distanceTo(newPockemon.location) < 2) {
newPockemon.IsCatch = true
listPockemons[i] = newPockemon
playerPower += newPockemon.power!!
Toast.makeText(applicationContext,
"You catch new pockemon your new pwoer is " + playerPower,
Toast.LENGTH_LONG).show()
}
}
}
}
Thread.sleep(1000)
} catch (ex: Exception) {
}
}
}
}
var playerPower = 0.0
var listPockemons = ArrayList<Pockemon>()
fun LoadPockemon() {
listPockemons.add(Pockemon(R.drawable.charmandertn,
"Charmander", "Charmander living in japan", 55.0, 35.687997, 10.085267))
listPockemons.add(Pockemon(R.drawable.bulbasaurtn,
"Bulbasaur", "Bulbasaur living in usa", 90.5, 35.687657, 10.084838))
listPockemons.add(Pockemon(R.drawable.squirtletn,
"Squirtle", "Squirtle living in iraq", 33.5, 35.687552, 10.084623))
}
}
AndroidManifest
package ahmedchtn.pockemontn
import android.location.Location
/**
* Created by Ahmed on 17-06-2017.
*/
class Pockemon{
var name:String?=null
var des:String?=null
var image:Int?=null
var power:Double?=null
var location:Location?=null
var IsCatch:Boolean?=false
constructor(image:Int,name:String,des:String,power:Double,lat:Double,log:Double){
this.name=name
this.des=des
this.image=image
this.power=power
this.location= Location(name)
this.location!!.latitude=lat
this.location!!.longitude=log
this.IsCatch=false
}
}
提前致谢！
答案 0 :(得分：0)
在设置中检查您的权限 - 如果该应用无权使用您的位置，则可能会显示空白。
答案 1 :(得分：0)
google_maps_api.xml并将您的api密钥插入到
文件中指定的药水，告诉您更换
＆＃34; google_maps_key＆＃34;那里。重建并运行您的应用。地图应该现在显示。
要制作Pokemons节目，您的LoadPokemon()函数调用应位于checkPermission(){}之后的GetUserLocation()函数中，而不应位于onCreate()函数中。