Java 尝试在单击导航抽屉中的项目后启动“地图”活动
最近,我在做一个应用程序,它有一个导航抽屉,我有一些项目,clik它应该打开一个地图活动,但当这样做时,我的应用程序停止并显示以下错误:Java 尝试在单击导航抽屉中的项目后启动“地图”活动,java,android,google-maps,arraylist,Java,Android,Google Maps,Arraylist,最近,我在做一个应用程序,它有一个导航抽屉,我有一些项目,clik它应该打开一个地图活动,但当这样做时,我的应用程序停止并显示以下错误: FATAL EXCEPTION: main Process: jocadoci.soloordena, PID: 2897 java.lang.IndexOutOfBoundsException: Invalid index 0, size is 0 at java.util.ArrayList.throwIndexOutOfBoundsExcepti
FATAL EXCEPTION: main
Process: jocadoci.soloordena, PID: 2897
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 jocadoci.soloordena.MapsItaly.geoLocate(MapsItaly.java:99)
at jocadoci.soloordena.MapsItaly.onMapReady(MapsItaly.java:73)
at com.google.android.gms.maps.SupportMapFragment$zza$1.zza(Unknown Source)
at com.google.android.gms.maps.internal.zzt$zza.onTransact(Unknown Source)
at android.os.Binder.transact(Binder.java:380)
at wl.a(:com.google.android.gms.DynamiteModulesB:82)
at maps.ad.t$5.run(Unknown Source)
at android.os.Handler.handleCallback(Handler.java:739)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:135)
at android.app.ActivityThread.main(ActivityThread.java:5254)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:903)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:698)
我认为这个错误是因为在“地图”活动中,我有一个使用android studio创建的ArrayList.java的类
private void geoLocate() throws IOException {
String location = "comida rapida y pizza";
Geocoder gc = new Geocoder(this);
List<Address> list = new ArrayList<>(gc.getFromLocationName(location, 1));
Address address = list.get(0);
String locality = address.getLocality();
Toast.makeText(this, locality, Toast.LENGTH_SHORT).show();
double lat = address.getLatitude();
double lng = address.getLongitude();
goToLocationZoom(lat, lng, 16);
}
private void geologe()引发IOException{
字符串位置=“comida rapida y pizza”;
地理编码器gc=新地理编码器(本);
List List=newarraylist(gc.getFromLocationName(location,1));
地址=list.get(0);
String locality=address.getLocality();
Toast.makeText(this,locality,Toast.LENGTH_SHORT).show();
双lat=地址。getLatitude();
double lng=address.getLongitude();
goToLocationZoom(拉丁美洲,液化天然气,16);
}
但我不确定错误是什么。我感谢您的帮助并提前表示感谢:)
Geocoder.getFromLocationName
如果未找到匹配项或没有可用的后端服务,将返回null或空列表()
因此,要解决您的问题,您必须检查是否有可用的结果:
private void geoLocate() throws IOException {
String location = "comida rapida y pizza";
Geocoder gc = new Geocoder(this);
List<Address> list = new ArrayList<>(gc.getFromLocationName(location, 1));
if (list != null && list.size() > 0) {
Address address = list.get(0);
String locality = address.getLocality();
Toast.makeText(this, locality, Toast.LENGTH_SHORT).show();
double lat = address.getLatitude();
double lng = address.getLongitude();
goToLocationZoom(lat, lng, 16);
} else {
Toast.makeText(this, "No results found", Toast.LENGTH_SHORT).show();
}
}
private void geologe()引发IOException{
字符串位置=“comida rapida y pizza”;
地理编码器gc=新地理编码器(本);
List List=newarraylist(gc.getFromLocationName(location,1));
if(list!=null&&list.size()>0){
地址=list.get(0);
String locality=address.getLocality();
Toast.makeText(this,locality,Toast.LENGTH_SHORT).show();
双lat=地址。getLatitude();
double lng=address.getLongitude();
goToLocationZoom(拉丁美洲,液化天然气,16);
}否则{
Toast.makeText(这是“未找到结果”,Toast.LENGTH_SHORT).show();
}
}
谢谢,伙计,这有助于查看我的地图活动。你知道如何像谷歌地图那样显示位置吗?