2:10:25.524:E/AndroidRuntime(2019):致命異常:主01-06 12:10:25.524:E/AndroidRuntime(2019):進程:com.kandy,PID:2019 01- 06 12:10:25.524:E/AndroidRuntime(2019): java.lang.RuntimeException:無法啓動活動 ComponentInfo {com.kandy/com.kandy.citymap}: java.lang.NullPointerException 01-06 12: 10:25.524: E/AndroidRuntime(2019):at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2195) 01-06 12:10:25.524:E/AndroidRuntime(2019):at android.app .ActivityThread.handleLaunchActivity(ActivityThread.java:2245) 01-06 12:10:25.524: E/AndroidRuntime(2019):at android.app.ActivityThread.access $ 800(ActivityThread.java:135)01-06 12:10:25.524:E/AndroidRuntime(2019):at android.app.ActivityThread $ H .handleMessage(ActivityThread.java:1196) 01-06 12:10:25.524:E/AndroidRuntime(2019):at android.os.Handler.dispatchMessage(Handler.java:102)01-06 12:10: 25.524:E/AndroidRuntime(2019):在 android.os.Looper.loop(Looper.java:136)01-06 12:10:25.524: E/AndroidRuntime(2019):at android.app.ActivityThread。 main(ActivityThread.java:5017)01-06 12:10:25.524:E/AndroidRuntime(2019):at java.lang.reflect.Method.invokeNative(Native Method)01-06 12:10:25。 524:E/AndroidRuntime(2019):在 java.lang.reflect.Method.invoke(Method.java:515)01-06 12:10:25.524: E/AndroidRuntime(2019):at com.android。 internal.os.ZygoteInit $ MethodAndArgsCaller.run(ZygoteInit.java:779) 01-06 12:10:25.524:E/AndroidRuntime(2019):at com.android.internal.os.ZygoteInit.main(ZygoteInit.java :595)01-06 12:10:25.524:E/AndroidRuntime(2019):at dalvik.system.NativeStart.main(Native Method)01-06 12:10:25.524: E/AndroidRuntime(2019):導致:java.lang.NullPointerException 01-06 12:10:25.524:E/AndroidRuntime(2019):at com.kandy.citymap.onCreate(citymap.java:25)01-06 12:10:25.524: E/AndroidRuntime(2019):在 android.app.Activity.performCreate(Activity.java:5231)01-06 12:10:25.524:E/AndroidRuntime(2019):at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1087) 01 -06 12:10:25.524:E/AndroidRuntime(2019):在 android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2159)Android代碼中的空指針異常?
我使用谷歌地圖爲這一個
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.model.LatLng;
import com.google.android.gms.maps.model.MarkerOptions;
import android.app.Activity;
import android.os.Bundle;
public class citymap extends Activity {
GoogleMap gmap;
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.citymap);
gmap=((MapFragment)getFragmentManager().findFragmentById(R.id.map)).getMap();
gmap.setMapType(GoogleMap.MAP_TYPE_NORMAL);//line 25
gmap.setMyLocationEnabled(true);
gmap.animateCamera(CameraUpdateFactory.newLatLngZoom(new LatLng(7.2964, 80.6350),12));
gmap.addMarker(new MarkerOptions().position(new LatLng(7.2964, 80.6350)).title("Kandy"));
}}
我想gmap.setMapType()是什麼導致你的NPE?這將是因爲你的地圖沒有膨脹,所以getMap返回null。只是一個猜測。 – zgc7009
標記你的線路號碼25. – BeingMIAkashs
首先格式化你的stacktrace,這樣它實際上是可讀的 – njzk2