如何解决 google 地图中的 setOnCameraChangeListener 错误方法

Question

我正在 android 项目中实施 google 地图。但是，当我将我的项目移至另一台 PC 机器时，我的 logcat 控制台中出现了应用程序崩溃和此错误消息：

FATAL EXCEPTION: main
Process: com.egsdigital.dolan, PID: 24887
java.lang.RuntimeException: Unable to start activity ComponentInfo{com.egsdigital.dolan/com.egsdigital.dolan.Activities.MainPage_Pasenger}: java.lang.NullPointerException: Attempt to invoke virtual method 'void com.google.android.gms.maps.GoogleMap.setOnCameraChangeListener(com.google.android.gms.maps.GoogleMap$OnCameraChangeListener)' on a null object reference
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2416)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2476)
at android.app.ActivityThread.-wrap11(ActivityThread.java)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1344)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:148)
at android.app.ActivityThread.main(ActivityThread.java:5417)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)
Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'void com.google.android.gms.maps.GoogleMap.setOnCameraChangeListener(com.google.android.gms.maps.GoogleMap$OnCameraChangeListener)' on a null object reference
at com.egsdigital.dolan.Activities.MainPage_Pasenger.onCreate(MainPage_Pasenger.java:178)
at android.app.Activity.performCreate(Activity.java:6237)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1107)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2369)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2476) 
at android.app.ActivityThread.-wrap11(ActivityThread.java) 
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1344) 
at android.os.Handler.dispatchMessage(Handler.java:102) 
at android.os.Looper.loop(Looper.java:148) 
at android.app.ActivityThread.main(ActivityThread.java:5417) 
at java.lang.reflect.Method.invoke(Native Method)

此处错误指向：

 map.setOnCameraChangeListener(new GoogleMap.OnCameraChangeListener() {
        @Override
        public void onCameraChange(CameraPosition position) {
            LatLngBounds bounds = map.getProjection().getVisibleRegion().latLngBounds;
            mAdapter.setBounds(bounds);
        }
    });

非常感谢。

Answer 1

您必须将新的 SHA1 添加到 google 控制台。
请参阅此 link 从您的 OS 获取 SHA1：How to get the SHA1 fingerprint certificate in android studio for debug mode

获取您的 SHA1 代码后，插入 console.developers 和运行应用程序。

希望能帮到你

如何解决 google 地图中的 setOnCameraChangeListener 错误方法

how to solve setOnCameraChangeListener Error method in google map

java

maps

android

google-maps