Android NullPointerException与Clusterer生成器一起使用Clusterer库
我尝试实现此库时出错 我收到一个NullPointerException,我不知道为什么,如果有人能帮我的话,请Android NullPointerException与Clusterer生成器一起使用Clusterer库,android,nullpointerexception,google-maps-markers,google-maps-android-api-2,markerclusterer,Android,Nullpointerexception,Google Maps Markers,Google Maps Android Api 2,Markerclusterer,我尝试实现此库时出错 我收到一个NullPointerException,我不知道为什么,如果有人能帮我的话,请 FATAL EXCEPTION: main java.lang.NullPointerException at io.nlopez.clusterer.QuadTreeBoundingBox.containsData(QuadTreeBoundingBox.java:51) at io.nlopez.clusterer.QuadTree$QuadTre
FATAL EXCEPTION: main java.lang.NullPointerException
at io.nlopez.clusterer.QuadTreeBoundingBox.containsData(QuadTreeBoundingBox.java:51)
at io.nlopez.clusterer.QuadTree$QuadTreeNode.insertData(QuadTree.java:99)
at io.nlopez.clusterer.QuadTree.insertData(QuadTree.java:33)
at io.nlopez.clusterer.Clusterer.addAll(Clusterer.java:148)
at greatlifedevelopers.studentrental.fragments.MapsV2General.initClusterer(MapsV2General.java:358)
at greatlifedevelopers.studentrental.fragments.MapsV2General.moveMap(MapsV2General.java:353)
at greatlifedevelopers.studentrental.fragments.MapsV2General.access$300(MapsV2General.java:57)
at greatlifedevelopers.studentrental.fragments.MapsV2General$AllAlojamientos.onPostExecute(MapsV2General.java:341)
at greatlifedevelopers.studentrental.fragments.MapsV2General$AllAlojamientos.onPostExecute(MapsV2General.java:231)
at android.os.AsyncTask.finish(AsyncTask.java:602)
at android.os.AsyncTask.access$600(AsyncTask.java:156)
at android.os.AsyncTask$InternalHandler.handleMessage(AsyncTask.java:615)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:137)
at android.app.ActivityThread.main(ActivityThread.java:4441)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:511)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551)
at dalvik.system.NativeStart.main(Native Method)
这是我的AsynTask,我在这里填充列表
public class AllAlojamientos extends AsyncTask<String, String, String>{
@Override
protected void onPreExecute() {
super.onPreExecute();
pDialog = new ProgressDialog(MapsV2General.this.getActivity());
pDialog.setMessage("Please wait a moment..");
pDialog.setIndeterminate(false);
pDialog.setCancelable(true);
pDialog.show();
}
@Override
protected String doInBackground(String... args) {
pointAlojamientoses = new ArrayList<PointAlojamientos>();
List<NameValuePair> params = new ArrayList<NameValuePair>();
JSONObject json = jParser.makeHttpRequest(url_todos_alojamientos, "GET", params);
/*JSONObject jsons = jParser.makeHttpRequest(url_todos_servicios, "GET", params);*/
try{
int success = json.getInt(TAG_SUCCESS);
if (success == 1) {
alojamiento = json.getJSONArray(TAG_ALOJAMIENTO);
for (int i = 0; i < alojamiento.length(); i++) {
JSONObject c = alojamiento.getJSONObject(i);
name = c.getString(TAG_NOMBRE);
directions = c.getString(TAG_DIRECCION);
pointAlojamientoses.add(new PointAlojamientos(new LatLng(Double.parseDouble(c.getString(TAG_LATITUD)), Double.parseDouble(c.getString(TAG_LONGITUD))), name, directions));
}
} else {
//
}
} catch (JSONException e){
pDialog.dismiss();
e.printStackTrace();
} catch (NullPointerException e){
pDialog.dismiss();
}
return null;
}
@Override
protected void onPostExecute(String a) {
super.onPostExecute(a);
pDialog.dismiss();
moveMap();
initClusterer();
}
}
公共类AllAlojamientos扩展异步任务{
@凌驾
受保护的void onPreExecute(){
super.onPreExecute();
pDialog=newprogressdialog(MapsV2General.this.getActivity());
pDialog.setMessage(“请稍候…”);
pDialog.setUndeterminate(假);
pDialog.setCancelable(真);
pDialog.show();
}
@凌驾
受保护的字符串doInBackground(字符串…args){
pointAlojamientoses=新的ArrayList();
List params=new ArrayList();
JSONObject json=jParser.makeHttpRequest(url_todos_alojamientos,“GET”,参数);
/*JSONObject jsons=jParser.makeHttpRequest(url_todos_servicios,“GET”,params)*/
试一试{
int success=json.getInt(TAG_success);
如果(成功==1){
alojamiento=json.getJSONArray(TAG_alojamiento);
对于(int i=0;i
这是我的initcluster,在这里我收到一个错误
private void initClusterer() {
clusterer = new Clusterer<PointAlojamientos>(this.getActivity(), googleMap);
clusterer.addAll(pointAlojamientoses);
clusterer.setAnimationEnabled(true);
clusterer.setMarkerAnimation(new MarkerAnimation() {
@Override
public void animateMarker(Marker marker, float interpolation) {
// Basic fading animation
marker.setAlpha(interpolation);
}
});
clusterer.setClustererListener(new Clusterer.ClustererClickListener<PointAlojamientos>() {
@Override
public void markerClicked(PointAlojamientos marker) {
Log.e("Cluster", "marker clicked");
}
@Override
public void clusterClicked(io.nlopez.clusterer.Cluster position) {
Log.e("Clusterer", "cluster clicked");
}
});
clusterer.setOnPaintingMarkerListener(new OnPaintingClusterableMarkerListener<PointAlojamientos>() {
@Override
public void onMarkerCreated(Marker marker, PointAlojamientos clusterable) {
}
@Override
public MarkerOptions onCreateMarkerOptions(PointAlojamientos poi) {
return new MarkerOptions().position(poi.getPosition()).title(poi.getName()).snippet(poi.getDescription());
}
});
clusterer.setOnPaintingClusterListener(new OnPaintingClusterListener<PointAlojamientos>() {
@Override
public void onMarkerCreated(Marker marker, io.nlopez.clusterer.Cluster<PointAlojamientos> cluster) {
}
@Override
public MarkerOptions onCreateClusterMarkerOptions(io.nlopez.clusterer.Cluster<PointAlojamientos> cluster) {
return new MarkerOptions()
.title("Clustering" + cluster.getWeight() + "items")
.position(cluster.getCenter())
.icon(BitmapDescriptorFactory.fromBitmap(getClusteredLabel(cluster.getWeight(), getActivity())));
}
});
}
private void initcluster(){
cluster=newcluster(this.getActivity(),googleMap);
cluster.addAll(pointalojamientos);
cluster.setAnimationEnabled(true);
cluster.setMarkerAnimation(新MarkerAnimation(){
@凌驾
公共空心动画标记器(标记器、浮点插值){
//基本淡入淡出动画
marker.setAlpha(插值);
}
});
setClusterListener(新的clusterer.ClusterClickListener(){
@凌驾
已单击公共无效标记(PointAlojamientos标记){
Log.e(“集群”、“点击标记”);
}
@凌驾
已单击公共无效簇(io.nlopez.clusterer.ClusterPosition){
Log.e(“cluster”、“cluster clicked”);
}
});
setOnPaintingMarkerListener(新的OnPaintingClusterableMarkerListener(){
@凌驾
MarkerCreated上的公共空白(Marker Marker,PointAlojamientos clusterable){
}
@凌驾
公共标记选项onCreateMarkerOptions(PointAlojamientos poi){
返回新的MarkerOptions().position(poi.getPosition()).title(poi.getName()).snippet(poi.getDescription());
}
});
setOnPaintingClusterListener(新的OnPaintingClusterListener(){
@凌驾
MarkerCreated上的公共空白(Marker Marker,io.nlopez.Cluster.Cluster Cluster){
}
@凌驾
公共标记选项onCreateClusterMarkerOptions(io.nlopez.clusterer.Cluster-Cluster){
返回新的MarkerOptions()
.title(“集群”+cluster.getWeight()+“项”)
.position(cluster.getCenter())
.icon(BitmapDescriptorFactory.fromBitmap(getClusteredLabel(cluster.getWeight(),getActivity()));
}
});
}
除了调用onPostExecute()
内的调用之外,是否还调用initcluster()
内的moveMap()
?另外,调用cluster.addAll(pointAlojamientoses)时,pointAlojamientoses
看起来是空的代码>是的,这就是问题“cluster.addAll(pointalojamientos);”当我给他打电话时,他是empy。对不起,我做错了什么?首先,确保从GET请求返回有效的JSON响应。然后,记录alojamiento.length()的值
并确保它进入了调用pointalojamientos.add()的循环中。
谢谢您的时间。我最近检查了所有这些,效果很好。我从JSON接收了所有数据,并将列表填充到循环中。但是仍然在cluster.addAll(pointalOjamientos)中出现NullPointerException代码>