我的应用程序在应用程序运行时每次打开位置时都会崩溃，我还发布了下面的日志文件，它显示了IndexOutOfBoundsException：索引0无效，大小为0，我搜索此错误差不多2天但是无法解决它，请给出任何解决方案，而不是
import android.*;
import android.Manifest;
import android.annotation.TargetApi;
import android.content.Context;
import android.content.DialogInterface;
import android.content.Intent;
import android.content.pm.PackageManager;
import android.graphics.Color;
import android.location.Address;
import android.location.Geocoder;
import android.location.Location;
import android.location.LocationManager;
import android.os.Build;
import android.support.annotation.NonNull;
import android.support.v4.app.ActivityCompat;
import android.support.v4.app.FragmentActivity;
import android.os.Bundle;
import android.support.v4.content.ContextCompat;
import android.support.v7.app.AlertDialog;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.widget.TextView;
import android.widget.Toast;
import com.google.android.gms.appdatasearch.GetRecentContextCall;
import com.google.android.gms.common.ConnectionResult;
import com.google.android.gms.common.api.GoogleApiClient;
import com.google.android.gms.location.LocationListener;
import com.google.android.gms.location.LocationRequest;
import com.google.android.gms.location.LocationServices;
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.Marker;
import com.google.android.gms.maps.model.MarkerOptions;
import com.google.android.gms.maps.model.PolylineOptions;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import java.util.Locale;
public class MainActivit extends FragmentActivity implements OnMapReadyCallback, GoogleApiClient.ConnectionCallbacks, GoogleApiClient.OnConnectionFailedListener, LocationListener, GoogleMap.OnMarkerClickListener {
int REQUEST_ACCESS_FINE_LOCATION;
private GoogleMap mMap;
LocationRequest mLocationRequest;
Location currentLocation;
GoogleApiClient client;
double user_latitude;
double user_longitude;
TextView details;
boolean gps_enabled;
String address;
Context context;
int REQUEST_LOCATION;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
// 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);
client=new GoogleApiClient.Builder(this).addConnectionCallbacks(this).addOnConnectionFailedListener(this).addApi(LocationServices.API).build();
client.connect();
mLocationRequest=new LocationRequest();
details= (TextView) findViewById(R.id.txdetails);
}
/**
* 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.
*/
@TargetApi(Build.VERSION_CODES.M)
public void onMapReady(GoogleMap googleMap) {
mMap = googleMap;
if (checkSelfPermission(Manifest.permission.ACCESS_FINE_LOCATION) == PackageManager.PERMISSION_GRANTED && checkSelfPermission(Manifest.permission.ACCESS_COARSE_LOCATION) == PackageManager.PERMISSION_GRANTED) {
mMap.setMyLocationEnabled(true);
} else {
if (shouldShowRequestPermissionRationale(Manifest.permission.ACCESS_FINE_LOCATION)) {
Toast.makeText(MainActivit.this, "Location permission is needed", Toast.LENGTH_SHORT).show();
}
requestPermissions(new String[]{Manifest.permission.ACCESS_FINE_LOCATION}, REQUEST_LOCATION);
}
}
@Override
public void onRequestPermissionsResult(int requestCode, String[] permissions, int[] grantResults) {
if (requestCode == REQUEST_LOCATION) {
if (grantResults[0] == PackageManager.PERMISSION_GRANTED) {
if (ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
// TODO: Consider calling
// 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 details.
return;
}
mMap.setMyLocationEnabled(true);
} else {
Toast.makeText(MainActivit.this, "Permission not granted", Toast.LENGTH_SHORT).show();
}
}
else {
super.onRequestPermissionsResult(requestCode,permissions,grantResults);
}
}
@Override
protected void onStart() {
Log.d("FUNCTION","onStart");
super.onStart();
client.connect();
}
@Override
protected void onStop() {
Log.d("FUNCTION","onStop");
client.disconnect();
super.onStop();
}
@Override
public void onConnected(Bundle bundle) {
Log.d("FUNCTION","onConnected");
if (ActivityCompat.checkSelfPermission(this, android.Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
return;
}
mLocationRequest.setInterval(1000);
currentLocation= LocationServices.FusedLocationApi.getLastLocation(client);
if(currentLocation==null) {
Toast.makeText(this, "Could not fetch current location", Toast.LENGTH_LONG).show();
LocationServices.FusedLocationApi.requestLocationUpdates(client, mLocationRequest,this);
}
//If the retrieved location is not null place a marker at that position
else{
user_latitude = currentLocation.getLatitude();
user_longitude = currentLocation.getLongitude();
if (currentLocation != null)
Log.d("CURR LOCATION VAL", String.valueOf(currentLocation));
LatLng user_coordinates = new LatLng(currentLocation.getLatitude(), currentLocation.getLongitude());
LatLng cry_coordinates=new LatLng(13.071160, 80.240431);
LatLng eklavya_coordinated=new LatLng(13.043065, 80.273880);
mMap.addMarker(new MarkerOptions().position(user_coordinates).title("Marker at current location"));
mMap.moveCamera(CameraUpdateFactory.newLatLng(user_coordinates));
mMap.animateCamera(CameraUpdateFactory.newLatLngZoom(user_coordinates,10));
mMap.addMarker(new MarkerOptions().position(cry_coordinates).title("cry"));
mMap.addMarker(new MarkerOptions().position(eklavya_coordinated).title("Smile Foundation"));
mMap.setOnMarkerClickListener(this);
}
LocationServices.FusedLocationApi.requestLocationUpdates(client, mLocationRequest, this);
}
@Override
public void onConnectionSuspended(int i) {
}
@Override
public void onLocationChanged(Location location) {
currentLocation = location;
if (currentLocation == null) {
Toast.makeText(this, "could not fetch user location", Toast.LENGTH_SHORT).show();
} else {
LocationManager manager = (LocationManager) getSystemService(LOCATION_SERVICE);
gps_enabled = manager.isProviderEnabled(LocationManager.GPS_PROVIDER);
Geocoder geocoder = new Geocoder(this, Locale.getDefault());
if (gps_enabled) {
try {
//Implementing reverse geocoding to get the user address in readable format
List<Address> addresses = geocoder.getFromLocation(user_latitude, user_longitude, 1);
Address fetchedAddress = addresses.get(0);
StringBuilder strAddress = new StringBuilder();
for (int i = 0; i < fetchedAddress.getMaxAddressLineIndex(); i++) {
strAddress.append(fetchedAddress.getAddressLine(i));
strAddress.append(" ");
address = strAddress.toString();
details.setText(address);
}
} catch (IOException e) {
e.printStackTrace();
}
}
}
}
@Override
public void onConnectionFailed(ConnectionResult connectionResult) {
}
@Override
public boolean onMarkerClick(Marker marker) {
if(marker.getTitle().equals("cry")) { // if marker source is clicked
AlertDialog.Builder cry = new AlertDialog.Builder(this);
cry.setMessage("Child Rights and You commonly abbreviated as CRY is a non-profit organisation like other NGOs in India and aims to restore children's rights. The organisation was established in 1979");
cry.setPositiveButton("Donate",new DialogInterface.OnClickListener()
{
@Override
public void onClick(DialogInterface dialogInterface, int i) {
Intent intent=new Intent(MainActivit.this,Cry_Info.class);
startActivity(intent);
}
});
cry.setTitle("CRY");
AlertDialog alertDialog = cry.create();
alertDialog.show();
}
else if (marker.getTitle().equals("Smile Foundation"))
{
AlertDialog.Builder smile = new AlertDialog.Builder(this);
smile.setMessage("Smile Foundation is a national level development organisation directly benefitting over 400,000 children and their families every year, through 158 welfare projects on education, healthcare, livelihood and women empowerment, in more than 700 remote villages and slums across 25 states of India");
smile.setPositiveButton("Donate", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialogInterface, int i) {
Intent intent=new Intent(MainActivit.this,Eklavya_Info.class);
startActivity(intent);
}
});
smile.setTitle("SMILE FOUNDATION");
AlertDialog alertDialog = smile.create();
alertDialog.show();
}
return false;
}
}
ANDROID MONITOR ERROR
07-17 13:18:33.980 3815-3815/com.example.mactavish.code24_maps D/AndroidRuntime: Shutting down VM
07-17 13:18:33.990 3815-3815/com.example.mactavish.code24_maps E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.example.mactavish.code24_maps, PID: 3815
java.lang.IndexOutOfBoundsException: Invalid index 0, size is 0
at java.util.ArrayList.throwIndexOutOfBoundsException(ArrayList.java:255)
at java.util.ArrayList.get(ArrayList.java:308)
at com.example.mactavish.code24_maps.MainActivit.onLocationChanged(MainActivit.java:225)
at com.google.android.gms.location.internal.zzk$zzb.handleMessage(Unknown Source)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:148)
at android.app.ActivityThread.main(ActivityThread.java:5443)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:728)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:618)
答案 0 :(得分：2)
在调用'addresses.get（0）'之前，你应该检查大小是否大于0。
答案 1 :(得分：0)
错误说它无法从MainActivit.onLocationChanged(MainActivit.java:225)
addresses.get(0);
android中的地理编码器api非常不可靠你应该使用回退方法，例如请求Google地理编码api As shown here