我正在发现这个错误我在地图上触摸搜索位置图标...我有3个位置。 2位置我的位置＆amp;客户所在地＆amp;我有搜索editbox。当我搜索该位置时，它正在显示d图标在正确的位置但是我触摸该图标它将强制关闭...我必须得到对话框。 这是我的代码 Can anyone guide me how to get Google Directions between two locations using JSON
PLZ帮我提前谢谢
08-27 17:52:52.708: D/AndroidRuntime(3721): Shutting down VM
08-27 17:52:52.708: W/dalvikvm(3721): threadid=1: thread exiting with uncaught exception (group=0x40be71f8)
08-27 17:52:52.723: E/AndroidRuntime(3721): FATAL EXCEPTION: main
08-27 17:52:52.723: E/AndroidRuntime(3721): java.lang.NullPointerException
08-27 17:52:52.723: E/AndroidRuntime(3721): at android.app.AlertDialog.resolveDialogTheme(AlertDialog.java:142)
08-27 17:52:52.723: E/AndroidRuntime(3721): at android.app.AlertDialog$Builder.<init>(AlertDialog.java:359)
08-27 17:52:52.723: E/AndroidRuntime(3721): at com.androidhive.googleplacesandmaps.AddItemizedOverlay.onTap(AddItemizedOverlay.java:74)
08-27 17:52:52.723: E/AndroidRuntime(3721): at com.google.android.maps.ItemizedOverlay.onTap(ItemizedOverlay.java:453)
08-27 17:52:52.723: E/AndroidRuntime(3721): at com.google.android.maps.OverlayBundle.onTap(OverlayBundle.java:83)
08-27 17:52:52.723: E/AndroidRuntime(3721): at com.google.android.maps.MapView$1.onSingleTapUp(MapView.java:356)
08-27 17:52:52.723: E/AndroidRuntime(3721): at com.google.android.maps.GestureDetector.onTouchEvent(GestureDetector.java:533)
08-27 17:52:52.723: E/AndroidRuntime(3721): at com.google.android.maps.MapView.onTouchEvent(MapView.java:683)
08-27 17:52:52.723: E/AndroidRuntime(3721): at android.view.View.dispatchTouchEvent(View.java:5588)
08-27 17:52:52.723: E/AndroidRuntime(3721): at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:1951)
08-27 17:52:52.723: E/AndroidRuntime(3721): at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:1712)
08-27 17:52:52.723: E/AndroidRuntime(3721): at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:1957)
08-27 17:52:52.723: E/AndroidRuntime(3721): at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:1726)
08-27 17:52:52.723: E/AndroidRuntime(3721): at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:1957)
08-27 17:52:52.723: E/AndroidRuntime(3721): at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:1726)
08-27 17:52:52.723: E/AndroidRuntime(3721): at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:1957)
08-27 17:52:52.723: E/AndroidRuntime(3721): at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:1726)
08-27 17:52:52.723: E/AndroidRuntime(3721): at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:1957)
08-27 17:52:52.723: E/AndroidRuntime(3721): at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:1726)
08-27 17:52:52.723: E/AndroidRuntime(3721): at com.android.internal.policy.impl.PhoneWindow$DecorView.superDispatchTouchEvent(PhoneWindow.java:2060)
08-27 17:52:52.723: E/AndroidRuntime(3721): at com.android.internal.policy.impl.PhoneWindow.superDispatchTouchEvent(PhoneWindow.java:1398)
08-27 17:52:52.723: E/AndroidRuntime(3721): at android.app.Activity.dispatchTouchEvent(Activity.java:2364)
08-27 17:52:52.723: E/AndroidRuntime(3721): at com.android.internal.policy.impl.PhoneWindow$DecorView.dispatchTouchEvent(PhoneWindow.java:2008)
08-27 17:52:52.723: E/AndroidRuntime(3721): at android.view.View.dispatchPointerEvent(View.java:5768)
08-27 17:52:52.723: E/AndroidRuntime(3721): at android.view.ViewRootImpl.deliverPointerEvent(ViewRootImpl.java:2911)
08-27 17:52:52.723: E/AndroidRuntime(3721): at android.view.ViewRootImpl.handleMessage(ViewRootImpl.java:2485)
08-27 17:52:52.723: E/AndroidRuntime(3721): at android.view.ViewRootImpl.processInputEvents(ViewRootImpl.java:852)
08-27 17:52:52.723: E/AndroidRuntime(3721): at android.view.ViewRootImpl.handleMessage(ViewRootImpl.java:2494)
08-27 17:52:52.723: E/AndroidRuntime(3721): at android.os.Handler.dispatchMessage(Handler.java:99)
08-27 17:52:52.723: E/AndroidRuntime(3721): at android.os.Looper.loop(Looper.java:137)
08-27 17:52:52.723: E/AndroidRuntime(3721): at android.app.ActivityThread.main(ActivityThread.java:4514)
08-27 17:52:52.723: E/AndroidRuntime(3721): at java.lang.reflect.Method.invokeNative(Native Method)
08-27 17:52:52.723: E/AndroidRuntime(3721): at java.lang.reflect.Method.invoke(Method.java:511)
08-27 17:52:52.723: E/AndroidRuntime(3721): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:790)
08-27 17:52:52.723: E/AndroidRuntime(3721): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:557)
08-27 17:52:52.723: E/AndroidRuntime(3721): at dalvik.system.NativeStart.main(Native Method)
08-27 17:52:59.911: I/Process(3721): Sending signal. PID: 3721 SIG: 9
Placesmapactivity.java
上面的tr是我的完整代码的链接 只需使用此方法进行快速参考..
@Override
public void onClick(View v) {
String usrLoc = autoCompletetextView.getText().toString();
Geocoder gc = new Geocoder(PlacesMapActivity.this);
try {
addr=gc.getFromLocationName(usrLoc, 3);//maximum 2 results
if(addr.size()>0){
address=addr.get(0);//get the first result
convertLongi=address.getLongitude();
convertLati=address.getLatitude();
geopointsearch = new GeoPoint((int)(convertLati * 1E6), (int)(convertLongi * 1E6));
// Map geopointsearch overlay item
itemizedOverlay2 = new AddItemizedOverlay(drawable_client);
overlayitem = new OverlayItem(geopointsearch, "Your Location2", "I am ur client!");
itemizedOverlay2.addOverlay(overlayitem);
mapOverlays.add(itemizedOverlay2);
itemizedOverlay2.populateNow();
mc.animateTo(geopointsearch);
// mc.zoomIn();
}
} catch (IOException e) {
e.printStackTrace();
}
}
});
// Map overlay item
itemizedOverlay = new AddItemizedOverlay(drawable_user, this);
overlayitem = new OverlayItem(geoPoint, "Your Location","That is you!");
itemizedOverlay.addOverlay(overlayitem);
mapOverlays.add(itemizedOverlay);
itemizedOverlay.populateNow();
// Map client overlay item
itemizedOverlay1 = new AddItemizedOverlay(drawable_client, this);
overlayitem1 = new OverlayItem(geoPoint1, "Your Location2", "I am ur client!");
itemizedOverlay1.addOverlay(overlayitem1);
mapOverlays.add(itemizedOverlay1);
itemizedOverlay1.populateNow();
// Map near overlay item
itemizedOverlay = new AddItemizedOverlay(drawable, this);
// Map geopointsearch overlay item
/* itemizedOverlay2 = new AddItemizedOverlay(drawable_client, this);
overlayitem2 = new OverlayItem(geopointsearch, "Your Location3", "ur searching for me!");
itemizedOverlay2.addOverlay(overlayitem2);
mapOverlays.add(itemizedOverlay2);
itemizedOverlay2.populateNow();*/
AddItemizedOverlay.java
公共类AddItemizedOverlay扩展了ItemizedOverlay {
private ArrayList<OverlayItem> mapOverlays = new ArrayList<OverlayItem>();
private Context context;
MapController mc;
Drawable drawable;
private GeoPoint geopoint;
public AddItemizedOverlay(Drawable defaultMarker) {
super(boundCenterBottom(defaultMarker));
}
public AddItemizedOverlay(Drawable defaultMarker, Context context) {
this(defaultMarker);
this.context = context;
}
@Override
public boolean onTouchEvent(MotionEvent event, MapView mapView)
{
if (event.getAction() == 1) {
GeoPoint geopoint = mapView.getProjection().fromPixels(
(int) event.getX(),
(int) event.getY());
// latitude
double lat = geopoint.getLatitudeE6() / 1E6;
// longitude
double lon = geopoint.getLongitudeE6() / 1E6;
// Toast.makeText(context, "Lat: " + lat + ", Lon: "+lon, Toast.LENGTH_SHORT).show();
}
return false;
}
@Override
protected OverlayItem createItem(int i) {
return mapOverlays.get(i);
}
@Override
public int size() {
return mapOverlays.size();
}
@Override
protected boolean onTap(int index) {
OverlayItem item = mapOverlays.get(index);
AlertDialog.Builder dialog = new AlertDialog.Builder(this.context);
dialog.setTitle(item.getTitle());
dialog.setMessage(item.getSnippet());
dialog.setPositiveButton("OK", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
}
});
dialog.show();
return true;
}
public void addOverlay(OverlayItem overlay) {
mapOverlays.add(overlay);
}
public void populateNow(){
this.populate();
}
}
答案 0 :(得分：0)
尝试更改受保护的布尔值onTap（int index），如下所示：
@Override
protected boolean onTap(int index) {
OverlayItem item = mapOverlays.get(index);
AlertDialog.Builder dialog = new AlertDialog.Builder(this.context);
dialog.setTitle(item.getTitle());
dialog.setMessage(item.getSnippet());
dialog.setPositiveButton("OK", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
}
});
AlertDialog alertDialog=dialog.create();
alertDialog.show();
return true;
}
您需要从DialogBuilder创建AlertDialog。