加載活動從onBalloonTap

我使用的是從GitHub的mapviewballoons，它是工作到哪裏，我試圖從ballonItemizedOverlay加載活動從onBalloonTap

private ArrayList<OverlayItem> m_overlays = new ArrayList<OverlayItem>(); 
private Context c; 


public mlgwItemizedOverlay(Drawable defaultMarker, MapView mapView) { 
    super(boundCenter(defaultMarker), mapView); 
    c = mapView.getContext(); 
} 

public void addOverlay(OverlayItem overlay) { 
    m_overlays.add(overlay); 
    populate(); 
} 

@Override 
protected OverlayItem createItem(int i) { 
    return m_overlays.get(i); 
} 

@Override 
public int size() { 
    return m_overlays.size(); 
} 


@Override 
protected boolean onBalloonTap(int index, OverlayItem item) { 
    Intent Details = new Intent(c, BlogActivity.class); 
    //Details.putExtra("Id", 1327); 
    c.startActivity(Details); 
    return true; 
}

}

這裏是打開另一個活動點我主要活動

TapControlledMapView mapView; // use the custom TapControlledMapView 
List<Overlay> mapOverlays; 
Drawable drawable; 
mlgwItemizedOverlay itemizedOverlay; 
mlgwItemizedOverlay itemizedOverlay2; 

private static final class LatLonPoints extends GeoPoint { 
    public LatLonPoints(double latitude, double longitude) { 
     super((int) (latitude * 1E6), (int) (longitude * 1E6)); 
    } 
} 
@Override 
public void onCreate(Bundle savedInstanceState) { 

    super.onCreate(savedInstanceState); 
    setContentView(R.layout.main); 


    mapView = (TapControlledMapView) findViewById(R.id.mapview); 
    mapView.setBuiltInZoomControls(true); 

    // dismiss balloon upon single tap of MapView (iOS behavior) 
    mapView.setOnSingleTapListener(new OnSingleTapListener() {  
     @Override 
     public boolean onSingleTap(MotionEvent e) { 
      itemizedOverlay.hideAllBalloons(); 
      return true; 
     } 
    }); 

    mapOverlays = mapView.getOverlays(); 

    // first overlay 
    drawable = getResources().getDrawable(R.drawable.marker); 
    itemizedOverlay = new mlgwItemizedOverlay(drawable, mapView); 
    // set iOS behavior attributes for overlay 
    itemizedOverlay.setShowClose(false); 
    itemizedOverlay.setShowDisclosure(true); 
    itemizedOverlay.setSnapToCenter(false); 

    GeoPoint StartPoint = new LatLonPoints(35.149534,-90.04898); 
     // first overlay 

    GeoPoint point = new LatLonPoints(35.139646,-90.05521); 

    OverlayItem overlayItem = new OverlayItem(point, "Hello", "I'm am the first location");      
    itemizedOverlay.addOverlay(overlayItem); 
    mapOverlays.add(itemizedOverlay); 

    GeoPoint point2 = new LatLonPoints(35.020922,-90.027045); 
    OverlayItem overlayItem2 = new OverlayItem(point2, "Hello", "I'm am the second location"); 
    itemizedOverlay.addOverlay(overlayItem2); 
    mapOverlays.add(itemizedOverlay); 

    GeoPoint point3 = new LatLonPoints(35.151009,-89.978281); 
    OverlayItem overlayItem3 = new OverlayItem(point3, "Hello", "I'm am the third location");  
    itemizedOverlay.addOverlay(overlayItem3); 
    mapOverlays.add(itemizedOverlay); 

    GeoPoint point4 = new LatLonPoints(35.088971,-89.965608); 
    OverlayItem overlayItem4 = new OverlayItem(point4, "Hello", "I'm am the fourth location");   
    itemizedOverlay.addOverlay(overlayItem4);  
    mapOverlays.add(itemizedOverlay); 

    GeoPoint point5 = new LatLonPoints(35.341282,-89.8922298); 
    OverlayItem overlayItem5 = new OverlayItem(point5, "Hello", "I'm am the fifth location");  
    itemizedOverlay.addOverlay(overlayItem5);  
    mapOverlays.add(itemizedOverlay); 

    if (savedInstanceState == null) { 

     final MapController mc = mapView.getController(); 
     mc.animateTo(StartPoint); 
     mc.setZoom(11); 

    } else { 

     // example restoring focused state of overlays 
     int focused; 
     focused = savedInstanceState.getInt("focused_1", -1); 
     if (focused >= 0) { 
      itemizedOverlay.setFocus(itemizedOverlay.getItem(focused)); 
     } 
     focused = savedInstanceState.getInt("focused_2", -1); 
     if (focused >= 0) { 
      itemizedOverlay2.setFocus(itemizedOverlay2.getItem(focused)); 
     } 

    } 

} 
    public void startCustomActivity(){ 
     Intent Details = new Intent(getBaseContext(), BlogActivity.class); 
     Details.putExtra("Id", 1327); 
     startActivity(Details); 
    } 

@Override 
protected boolean isRouteDisplayed() { 
    return false; 
} 

@Override 
protected void onSaveInstanceState(Bundle outState) { 

    // example saving focused state of overlays 
    if (itemizedOverlay.getFocus() != null) outState.putInt("focused_1", itemizedOverlay.getLastFocusedIndex()); 
    if (itemizedOverlay2.getFocus() != null) outState.putInt("focused_2", itemizedOverlay2.getLastFocusedIndex()); 
    super.onSaveInstanceState(outState); 

}

}

，這裏是博客活動我試圖打開

public class BlogActivity extends Activity { 
/** Called when the activity is first created. */ 
@Override 
public void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    TextView textview = new TextView(this); 
    textview.setText("This is the Blog tab"); 
    setContentView(textview); 
}

}

一旦我按覆蓋應用程序崩潰和正在返回的錯誤是：

04-18 04:39:56.465: E/MapActivity(8938): Couldn't get connection factory client 04-18 04:40:03.075: E/AndroidRuntime(8938): FATAL EXCEPTION: main 04-18 04:40:03.075: E/AndroidRuntime(8938): java.lang.RuntimeException: Unable to pause activity {com.mlgw.MlgwMapView/com.mlgw.MlgwMapView.MlgwMapViewActivity}: java.lang.NullPointerException 04-18 04:40:03.075: E/AndroidRuntime(8938): at android.app.ActivityThread.performPauseActivity(ActivityThread.java:2354) 04-18 04:40:03.075: E/AndroidRuntime(8938): at android.app.ActivityThread.performPauseActivity(ActivityThread.java:2311) 04-18 04:40:03.075: E/AndroidRuntime(8938): at android.app.ActivityThread.handlePauseActivity(ActivityThread.java:2291) 04-18 04:40:03.075: E/AndroidRuntime(8938): at android.app.ActivityThread.access$1700(ActivityThread.java:117) 04-18 04:40:03.075: E/AndroidRuntime(8938): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:938) 04-18 04:40:03.075: E/AndroidRuntime(8938): at android.os.Handler.dispatchMessage(Handler.java:99) 04-18 04:40:03.075: E/AndroidRuntime(8938): at android.os.Looper.loop(Looper.java:130) 04-18 04:40:03.075: E/AndroidRuntime(8938): at android.app.ActivityThread.main(ActivityThread.java:3683) 04-18 04:40:03.075: E/AndroidRuntime(8938): at java.lang.reflect.Method.invokeNative(Native Method) 04-18 04:40:03.075: E/AndroidRuntime(8938): at java.lang.reflect.Method.invoke(Method.java:507) 04-18 04:40:03.075: E/AndroidRuntime(8938): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839) 04-18 04:40:03.075: E/AndroidRuntime(8938): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597) 04-18 04:40:03.075: E/AndroidRuntime(8938): at dalvik.system.NativeStart.main(Native Method) 04-18 04:40:03.075: E/AndroidRuntime(8938): Caused by: java.lang.NullPointerException 04-18 04:40:03.075: E/AndroidRuntime(8938): at com.mlgw.MlgwMapView.MlgwMapViewActivity.onSaveInstanceState(MlgwMapViewActivity.java:131) 04-18 04:40:03.075: E/AndroidRuntime(8938): at android.app.Activity.performSaveInstanceState(Activity.java:1037) 04-18 04:40:03.075: E/AndroidRuntime(8938): at android.app.Instrumentation.callActivityOnSaveInstanceState(Instrumentation.java:1181) 04-18 04:40:03.075: E/AndroidRuntime(8938): at android.app.ActivityThread.performPauseActivity(ActivityThread.java:2336) 04-18 04:40:03.075: E/AndroidRuntime(8938): ... 12 more

我的主要目標是通過更有關他們點擊新活動的註釋的數據。

你能告訴我我做錯了什麼或指向正確的解決方案。我搜索谷歌的其他答案，但我還沒有找到任何工作。

來源

2012-04-18 UndercoverGeek

** ** MapViewActivity已經**的onPause（）**方法重寫..？ – ngesh 2012-04-18 04:58:31

沒有onPause（）在主要活動 – UndercoverGeek 2012-04-18 05:07:25

非常有幫助http://stackoverflow.com/a/12816717/2183972 它解決了動作監聽器在ballon – Daniel 2013-04-29 20:59:44

你的問題是，你正在覆蓋onSaveInstanceState但沒有調用超類的方法：做到這一點。

@Override 
protected void onSaveInstanceState(Bundle outState) { 
    super.onSaveInstanceState(outState); 

    // example saving focused state of overlays 
    if (itemizedOverlay.getFocus() != null) outState.putInt("focused_1", itemizedOverlay.getLastFocusedIndex()); 
    if (itemizedOverlay2.getFocus() != null) outState.putInt("focused_2", itemizedOverlay2.getLastFocusedIndex()); 
    super.onSaveInstanceState(outState); 

}

看看是否有幫助。

來源

2012-04-18 05:57:28 Femi

這是我昨晚評論它的問題，它的工作。我已經打電話給超級班了，但是我使用了「itemOverlay2」，我拿掉了它，並在刪除它之後使用「itemOverlay」 – UndercoverGeek 2012-04-18 12:13:05

試試這個：

保護布爾onBalloonTap（INT指數，OverlayItem項）{
意向詳細=新意圖（C，BlogActivity.class）;
//Details.putExtra("Id「，1327）;
（（Activity）c）.startActivity（Details）;
返回true;
}

來源

2012-04-25 05:47:01

public class BlogActivity extends Activity { 
    /** Called when the activity is first created. */ 
    @Override 
    public void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     TextView textview = new TextView(this); 

     Bundle b=getIntent.getExtras(); 
     if(b!=null) 
     { 
     String s= b.getString("Id") 
     } 
     textview.setText("This is the Blog tab"); 
     setContentView(textview); 
    }

來源

2012-09-12 07:15:02 QuokMoon

加載活動從onBalloonTap

回答

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