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我正在尝试创建一个地图应用程序，我需要做一些类似于谷歌地图所做的事情。我想打开显示位置列表，当用户点击它们时，我想显示一个对话框。

我能做到这里。但是现在当用户单击打开的对话框时，我想显示另一个活动，其中包含他们单击的该项目的详细信息。

我试图开始一个新的意图，但它给了我一个错误。

这是我正在做的

private void drawPopupWindow(Canvas canvas,int index, MapView mapView, boolean shadow) {

        OverlayItem item = mOverlays.get(index);
        GeoPoint geoPoint = item.getPoint();

        LayoutInflater inflater = (LayoutInflater)mContext.getSystemService(Context.LAYOUT_INFLATER_SERVICE);

        LinearLayout dialogLayout = (LinearLayout)inflater.inflate(R.layout.location_dialog, null);
        LayoutParams mapDialogParams = new LayoutParams(
                ViewGroup.LayoutParams.WRAP_CONTENT, 
                ViewGroup.LayoutParams.WRAP_CONTENT, 
                geoPoint, -1, -22, 
                LayoutParams.BOTTOM_CENTER);
        mapView.addView(dialogLayout, mapDialogParams);

        dialogLayout.setOnClickListener(new OnClickListener() {

            @Override
            public void onClick(View v) {
                Intent detailIntent = new Intent(mContext, ItemDetailView.class);
                mContext.startActivity(detailIntent); // I passed the context from mapActivity
            }
        });     

    }

这是堆栈跟踪

> E/AndroidRuntime( 4985):
> java.lang.RuntimeException: Unable to
> start activity
> ComponentInfo{com.achie.test.mapssample/com.achie.test.mapssample.ItemDetailView}:
> android.view.InflateException: Binary
> XML file line #2: Error inflating
> class <unknown> E/AndroidRuntime(
> 4985):    at
> android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2496)
> E/AndroidRuntime( 4985):  at
> android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2512)
> E/AndroidRuntime( 4985):  at
> android.app.ActivityThread.access$2200(ActivityThread.java:119)
> E/AndroidRuntime( 4985):  at
> android.app.ActivityThread$H.handleMessage(ActivityThread.java:1863)
> E/AndroidRuntime( 4985):  at
> android.os.Handler.dispatchMessage(Handler.java:99)
> E/AndroidRuntime( 4985):  at
> android.os.Looper.loop(Looper.java:123)
> E/AndroidRuntime( 4985):  at
> android.app.ActivityThread.main(ActivityThread.java:4363)
> E/AndroidRuntime( 4985):  at
> java.lang.reflect.Method.invokeNative(Native
> Method) E/AndroidRuntime( 4985):  at
> java.lang.reflect.Method.invoke(Method.java:521)
> E/AndroidRuntime( 4985):  at
> com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:860)
> E/AndroidRuntime( 4985):  at
> com.android.internal.os.ZygoteInit.main(ZygoteInit.java:618)
> E/AndroidRuntime( 4985):  at
> dalvik.system.NativeStart.main(Native
> Method) E/AndroidRuntime( 4985):
> Caused by:
> android.view.InflateException: Binary
> XML file line #2: Error inflating
> class <unknown> E/AndroidRuntime(
> 4985):    at
> android.view.LayoutInflater.createView(LayoutInflater.java:513)
> E/AndroidRuntime( 4985):  at
> android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:565)
> E/AndroidRuntime( 4985):  at
> android.view.LayoutInflater.inflate(LayoutInflater.java:385)
> E/AndroidRuntime( 4985):  at
> android.view.LayoutInflater.inflate(LayoutInflater.java:320)
> E/AndroidRuntime( 4985):  at
> android.view.LayoutInflater.inflate(LayoutInflater.java:276)
> E/AndroidRuntime( 4985):  at
> com.android.internal.policy.impl.PhoneWindow.setContentView(PhoneWindow.java:198)
> E/AndroidRuntime( 4985):  at
> android.app.Activity.setContentView(Activity.java:1622)
> E/AndroidRuntime( 4985):  at
> com.achie.test.mapssample.ItemDetailView.onCreate(ItemDetailView.java:11)
> E/AndroidRuntime( 4985):  at
> android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)
> E/AndroidRuntime( 4985):  at
> android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2459)
> E/AndroidRuntime( 4985):  ... 11 more
> E/AndroidRuntime( 4985): Caused by:
> java.lang.reflect.InvocationTargetException
> E/AndroidRuntime( 4985):  at
> com.google.android.maps.MapView.<init>(MapView.java:238)
> E/AndroidRuntime( 4985):  at
> java.lang.reflect.Constructor.constructNative(Native
> Method) E/AndroidRuntime( 4985):  at
> java.lang.reflect.Constructor.newInstance(Constructor.java:446)
> E/AndroidRuntime( 4985):  at
> android.view.LayoutInflater.createView(LayoutInflater.java:500)
> E/AndroidRuntime( 4985):  ... 20 more
> E/AndroidRuntime( 4985): Caused by:
> java.lang.IllegalArgumentException:
> MapViews can only be created inside
> instances of MapActivity.
> E/AndroidRuntime( 4985):  at
> com.google.android.maps.MapView.<init>(MapView.java:282)
> E/AndroidRuntime( 4985):  at
> com.google.android.maps.MapView.<init>(MapView.java:255)
> E/AndroidRuntime( 4985):  ... 24 more

为什么我会收到此错误，如何解决此问题并打开新活动？

另外，我在哪里可以找到 android 上的谷歌地图的源代码？

谢谢你。

4

1 回答 1

3

正如堆栈跟踪告诉您的那样，“只能在 MapActivity 的实例中创建 MapView。” 您正在尝试MapView创建MapActivity. 更改您的代码以避免这样做，您将清除此错误。

于 2010-07-23T00:13:06.840 回答