我在Android Studio中有应用程序，它使用Google Play服务显示Google地图。应用程序是为Android 4.0.3编写的。我已为Google地图生成API密钥，并根据this tutorial将其放在google_maps_api.xml文件中。此外，我在Android Manifest中添加了Google API密钥和GPS（使用位置），Google服务和网络的权限：
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="vkalashnykov.org.mapygoogle">
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="com.google.android.providers.gsf.permission.READ_GSERVICES" />
<!--
The ACCESS_COARSE/FINE_LOCATION permissions are not required to use
Google Maps Android API v2, but you must specify either coarse or fine
location permissions for the 'MyLocation' functionality.
-->
<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:roundIcon="@mipmap/ic_launcher_round"
android:supportsRtl="true"
android:theme="@style/AppTheme">
<meta-data
android:name="com.google.android.gms.version"
android:value="@integer/google_play_services_version" />
<!--
The API key for Google Maps-based APIs is defined as a string resource.
(See the file "res/values/google_maps_api.xml").
Note that the API key is linked to the encryption key used to sign the APK.
You need a different API key for each encryption key, including the release key that is used to
sign the APK for publishing.
You can define the keys for the debug and release targets in src/debug/ and src/release/.
-->
<meta-data
android:name="com.google.android.geo.API_KEY"
android:value="@string/google_maps_key" />
<activity
android:name=".MapsActivity"
android:label="@string/title_activity_maps">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
</manifest>
我还添加了活动代码：
package vkalashnykov.org.mapygoogle;
import android.Manifest;
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.ActivityCompat;
import android.support.v4.app.FragmentActivity;
import android.os.Bundle;
import android.support.v4.content.ContextCompat;
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.LatLng;
import com.google.android.gms.maps.model.MarkerOptions;
public class MapsActivity extends FragmentActivity implements OnMapReadyCallback, LocationListener {
private GoogleMap mMap;
private static final int LOCATION_MIN_TIME = 30 * 10;
private static final int LOCATION_MIN_DISTANCE = 1;
private LocationManager locationManager;
private Location currentLocation;
public static final String FIXED = "FIXED";
double szerokosc_g; // latitude
double dlugosc_g; // longitude
static final Integer LOCATION = 0x1;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_maps);
// Obtain the SupportMapFragment and get notified when the map is ready to be used.
SupportMapFragment mapFragment = (SupportMapFragment) getSupportFragmentManager()
.findFragmentById(R.id.map);
mapFragment.getMapAsync(this);
if (Build.VERSION.SDK_INT >= 23) {
if (ActivityCompat.checkSelfPermission(MapsActivity.this, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
if (ActivityCompat.shouldShowRequestPermissionRationale(MapsActivity.this, Manifest.permission.ACCESS_FINE_LOCATION)) {
ActivityCompat.requestPermissions(MapsActivity.this, new String[]{Manifest.permission.ACCESS_FINE_LOCATION}, LOCATION);
} else {
//Metoda requestPermissions jest wywoływana aby uzytkownik mógł podjąć decyzję o nadaniu uprawnien
ActivityCompat.requestPermissions(MapsActivity.this, new String[]{Manifest.permission.ACCESS_FINE_LOCATION}, LOCATION);
}
} else {
Toast.makeText(MapsActivity.this, " " + Manifest.permission.ACCESS_FINE_LOCATION + " uprawnienia zostały przyznane.", Toast.LENGTH_SHORT).show();
}
if (ActivityCompat.checkSelfPermission(MapsActivity.this, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
Toast.makeText(MapsActivity.this, " " + Manifest.permission.ACCESS_FINE_LOCATION + "Uprawnienia nie zostały nadane", Toast.LENGTH_SHORT).show();
}
Toast.makeText(MapsActivity.this, "Wersja SDK systemu Android : " + Build.VERSION.SDK_INT , Toast.LENGTH_SHORT).show();
} else {
Toast.makeText(MapsActivity.this, "Wersja SDK systemu Android : " + Build.VERSION.SDK_INT , Toast.LENGTH_SHORT).show();
}
}
/**
* 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
public void onMapReady(GoogleMap googleMap) {
mMap = googleMap;
mMap.setMapType(GoogleMap.MAP_TYPE_HYBRID);
if (ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED)
{ return; }
szerokosc_g = locationManager.getLastKnownLocation(LocationManager.GPS_PROVIDER).getLatitude();
dlugosc_g = locationManager.getLastKnownLocation(LocationManager.GPS_PROVIDER).getLongitude();
LatLng pozycja = new LatLng(szerokosc_g,dlugosc_g); //adding position
mMap.addMarker(new MarkerOptions().position(pozycja).title("Pozycja"));
mMap.moveCamera(CameraUpdateFactory.newLatLng(pozycja));
}
@Override
protected void onStart() {
super.onStart();
locationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
if ( ContextCompat.checkSelfPermission( this, android.Manifest.permission.ACCESS_COARSE_LOCATION ) != PackageManager.PERMISSION_GRANTED ) {
ActivityCompat.requestPermissions( this, new String[] { android.Manifest.permission.ACCESS_COARSE_LOCATION },
LOCATION );
}
else
{ locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, LOCATION_MIN_TIME, LOCATION_MIN_DISTANCE, this);
Location gpsLocation = locationManager.getLastKnownLocation(LocationManager.GPS_PROVIDER);
if (gpsLocation != null) {
currentLocation = gpsLocation;
} else {
Location networkLocation = locationManager.getLastKnownLocation(LocationManager.NETWORK_PROVIDER);
if (networkLocation != null) {
currentLocation = networkLocation;
} else {
currentLocation = new Location(FIXED);
currentLocation.setAltitude(1);
currentLocation.setLatitude(43.296482);
currentLocation.setLongitude(5.36978);
}
onLocationChanged(currentLocation);
}
}
}
@Override
public void onLocationChanged(Location location) {
szerokosc_g = location.getLatitude();
dlugosc_g = location.getLongitude();
LatLng pozycja = new LatLng(szerokosc_g, dlugosc_g);
mMap.clear();
mMap.addMarker(new MarkerOptions().position(pozycja).title("Pozycja"));
mMap.moveCamera(CameraUpdateFactory.newLatLng(pozycja));
}
@Override
public void onStatusChanged(String provider, int status, Bundle extras) {
}
@Override
public void onProviderEnabled(String provider) {
}
@Override
public void onProviderDisabled(String provider) {
}
}
但是我在运行应用程序时得到的是意外错误：＆＃34;不幸的应用程序停止了。＆＃34;有什么问题或我如何检查appplcation有什么问题（在Android Studio上没有任何关于错误的消息或日志）？