当我单击警报对话框按钮时，我正在尝试拨打电话，此警报对话框附加到每个地理点的地图视图。我想我在这里做错了这是我的logcat：
02-04 16:21:22.578: E/AndroidRuntime(432): FATAL EXCEPTION: main
02-04 16:21:22.578: E/AndroidRuntime(432): java.lang.NullPointerException
02-04 16:21:22.578: E/AndroidRuntime(432): at fsg.mpssri.MEGAMAG.ListItimizedOverlay$CallMeclass.access$0(ListItimizedOverlay.java:88)
02-04 16:21:22.578: E/AndroidRuntime(432): at fsg.mpssri.MEGAMAG.ListItimizedOverlay$1.onClick(ListItimizedOverlay.java:66)
02-04 16:21:22.578: E/AndroidRuntime(432): at com.android.internal.app.AlertController$ButtonHandler.handleMessage(AlertController.java:159)
02-04 16:21:22.578: E/AndroidRuntime(432): at android.os.Handler.dispatchMessage(Handler.java:99)
02-04 16:21:22.578: E/AndroidRuntime(432): at android.os.Looper.loop(Looper.java:130)
02-04 16:21:22.578: E/AndroidRuntime(432): at android.app.ActivityThread.main(ActivityThread.java:3683)
02-04 16:21:22.578: E/AndroidRuntime(432): at java.lang.reflect.Method.invokeNative(Native Method)
02-04 16:21:22.578: E/AndroidRuntime(432): at java.lang.reflect.Method.invoke(Method.java:507)
02-04 16:21:22.578: E/AndroidRuntime(432): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839)
02-04 16:21:22.578: E/AndroidRuntime(432): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597)
02-04 16:21:22.578: E/AndroidRuntime(432): at dalvik.system.NativeStart.main(Native Method)
这里是我的 ListItimizedOverlay 类的代码
package fsg.mpssri.MEGAMAG;
import java.util.ArrayList;
import android.app.Activity;
import android.app.AlertDialog;
import android.content.Context;
import android.content.DialogInterface;
import android.content.DialogInterface.OnClickListener;
import android.content.Intent;
import android.graphics.drawable.Drawable;
import android.net.Uri;
import android.widget.Toast;
import com.google.android.maps.ItemizedOverlay;
import com.google.android.maps.OverlayItem;
public class ListItimizedOverlay extends ItemizedOverlay<OverlayItem> {
public CallMeclass clme;
public String phoneNum = "55-223-014";
public GeoloMe geololome;
private Context context;
private ArrayList<OverlayItem> arrayListOverlayItem = new ArrayList<OverlayItem>();
public ListItimizedOverlay(Drawable defaultMarker) {
// TODO Auto-generated constructor stub
super(boundCenterBottom(defaultMarker));
}
public ListItimizedOverlay(Drawable defaultMarker, Context pContext)
{
super(boundCenterBottom(defaultMarker));
this.context = pContext;
}
@Override
protected OverlayItem createItem(int i) {
// TODO Auto-generated method stub
return arrayListOverlayItem.get(i);
}
@Override
public int size() {
// TODO Auto-generated method stub
return arrayListOverlayItem.size();
}
@Override
protected boolean onTap(int index) {
// TODO Auto-generated method stub
OverlayItem item = arrayListOverlayItem.get(index);
AlertDialog.Builder dialog = new AlertDialog.Builder(context);
dialog.setIcon(R.drawable.icon__telephone);
dialog.setTitle(item.getTitle());
dialog.setMessage(item.getSnippet());
//phoneNum = item.getSnippet();
dialog.setPositiveButton("call us", new OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
// TODO Auto-generated method stub
//geololome.makeUrcall(phoneNum);
Toast.makeText(context, "azerty", Toast.LENGTH_SHORT);
clme.goCallMe(phoneNum);
}
});
dialog.show();
return true;
}
public void addOverlayItem(OverlayItem overlay)
{
arrayListOverlayItem.add(overlay);
populate();
}
private class CallMeclass extends Activity{
private void goCallMe(String phonenumber ) {
// TODO Auto-generated method stub
Intent i = new
Intent(android.content.Intent.ACTION_CALL,
Uri.parse(phonenumber));
startActivity(i);
}
}
}
希望朋友们能帮帮我 谢谢