我在tab（viewPager）中使用map，我想在地图中搜索位置为此目的我正在使用EditText字段和数组列表，但我仍然收到此错误。我无法找到它的问题所在。请有人建议我，我该怎么办？
FATAL EXCEPTION: main Process: com.example.saroosh.masjidnow, PID: 10465
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.saroosh.masjidnow.Tabs.AddMasjid$1.onClick(AddMasjid.java:61) at
android.view.View.performClick(View.java:5184) at
android.view.View$PerformClick.run(View.java:20910) at
android.os.Handler.handleCallback(Handler.java:739) at
android.os.Handler.dispatchMessage(Handler.java:95) at
android.os.Looper.loop(Looper.java:145) at
android.app.ActivityThread.main(ActivityThread.java:5942) at
java.lang.reflect.Method.invoke(Native Method) at
java.lang.reflect.Method.invoke(Method.java:372) at
com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1389)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1184)
我的java类如下所示。
AddMasjid.java
package com.example.saroosh.masjidnow.Tabs;
import android.Manifest;
import android.content.pm.PackageManager;
import android.location.Geocoder;
import android.support.annotation.Nullable;
import android.support.v4.app.ActivityCompat;
import android.support.v4.app.Fragment;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.content.Context;
import android.widget.Button;
import android.widget.EditText;
import com.example.saroosh.masjidnow.R;
import com.google.android.gms.identity.intents.Address;
import com.google.android.gms.maps.CameraUpdateFactory;
import com.google.android.gms.maps.GoogleMap;
import com.google.android.gms.maps.MapFragment;
import com.google.android.gms.maps.MapView;
import com.google.android.gms.maps.MapsInitializer;
import com.google.android.gms.maps.OnMapReadyCallback;
import com.google.android.gms.maps.model.LatLng;
import com.google.android.gms.maps.model.MarkerOptions;
import java.io.IOException;
import java.util.List;
public class AddMasjid extends Fragment implements OnMapReadyCallback {
MapView gMapView;
GoogleMap gMap = null;
Button sButton;
String location;
@Override
public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
View v = inflater.inflate(R.layout.add_masjid, container, false);
EditText sLocation = (EditText) v.findViewById(R.id.editText1);
location = sLocation.getText().toString();
sButton = (Button) v.findViewById(R.id.generalId);
sButton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
List<android.location.Address> addressList= null;
if (location != null || !location.equals(""))
{
Geocoder geocoder = new Geocoder(getActivity().getApplicationContext());
try {
addressList = geocoder.getFromLocationName(location, 1);
} catch (IOException e) {
e.printStackTrace();
}
android.location.Address address = addressList.get(0);
LatLng latlng = new LatLng(address.getLatitude(),address.getLatitude());
gMap.addMarker(new MarkerOptions().position(latlng).title("Marker"));
gMap.animateCamera(CameraUpdateFactory.newLatLng(latlng));
}
}
});
gMapView = (MapView) v.findViewById(R.id.map);
gMapView.getMapAsync(this);
gMapView.onCreate(savedInstanceState);
gMapView.onResume(); // needed to get the map to display immediately
try {
MapsInitializer.initialize(getActivity().getApplicationContext());
} catch (Exception e) {
e.printStackTrace();
}
return v;
}
@Override
public void onMapReady(GoogleMap map) {
gMap = map;
gMap.setMapType(GoogleMap.MAP_TYPE_NORMAL);
gMap.moveCamera(CameraUpdateFactory.newLatLngZoom(new
LatLng(0, 0), 0));
if (gMap != null) {
gMap.addMarker(new MarkerOptions().position(new LatLng(0, 0)).title("Marker"));
if (ActivityCompat.checkSelfPermission(getActivity().getApplicationContext()
, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(getActivity().getApplicationContext()
, 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;
}
gMap.setMyLocationEnabled(true);
gMap.getUiSettings().setMyLocationButtonEnabled(true);
}
}
@Override
public void onResume() {
super.onResume();
gMapView.onResume();
}
public void onSearch(View view) throws IOException{
}
@Override
public void onPause() {
super.onPause();
gMapView.onPause();
}
@Override
public void onDestroy() {
super.onDestroy();
gMapView.onDestroy();
}
@Override
public void onLowMemory() {
super.onLowMemory();
gMapView.onLowMemory();
}
}
答案 0 :(得分：0)
此处的地址列表为空：addressList.get(0)。
请注意，并非每个位置都有有效地址。你的代码必须处理这个事实。
答案 1 :(得分：0)
List<android.location.Address> addressList= null;
然后你
android.location.Address address = addressList.get(0);
尝试登录以检查添加位置
if (location != null || !location.equals(""))
{
Geocoder geocoder = new Geocoder(getActivity().getApplicationContext());
try {
addressList = geocoder.getFromLocationName(location, 1);
} catch (IOException e) {
e.printStackTrace();
}
}
因为这可能不会给你任何记录，并且使用addressList.get（0）你取位置0因为你知道在java位置从0,1,2开始如果没有位置0你将得到错误BoundOfException
答案 2 :(得分：0)
我已经解决了我的问题。我在editText方法中通过onCreat字段传递了我的位置字符串，这是我的addressList无法在列表中找到位置而我收到错误的方式。当我在editText方法中声明我的setOnClickListener时，我的列表会在其中找到其中的位置：
sButton =(Button) v.findViewById(R.id.generalId);
sButton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
hideSoftKeyboard(v);
EditText sLocation = (EditText)getActivity().findViewById(R.id.editText1);
location = sLocation.getText().toString();
List<android.location.Address> addressList= null;
if (location != null || location.length()>0) {
Geocoder geocoder = new Geocoder(getActivity().getApplicationContext());
try {
addressList = geocoder.getFromLocationName(location, 1);
} catch (IOException e) {
e.printStackTrace();
}
android.location.Address address = addressList.get(0);
String locality = address.getLocality();
Toast.makeText(getActivity(), locality, Toast.LENGTH_LONG).show();
double latitude = address.getLatitude();
double longitude = address.getLongitude();
LatLng latLng = new LatLng(latitude, longitude);
gMap.addMarker(new MarkerOptions().position(latLng).title("Marker"));
gMap.animateCamera(CameraUpdateFactory.newLatLng(latLng));
}
}
});