谷歌地圖當前位置氣球覆蓋？

我用android-mapviewballoons這段代碼來顯示氣球。

這裏當前位置顯示正在工作。當我點擊標記時，會出現錯誤（BalloonOverlayView 57,38行和BalloonItemizedOverlay 87,188,76行）。

哪裏是錯誤，我知道，但我不理解的部分，任何一個請幫我

這是logcat的錯誤

02-01 05:09:31.606: W/Trace(1250): Unexpected value from nativeGetEnabledTags: 0 
02-01 05:09:31.636: I/System.out(1250): 6666666666666 
02-01 05:09:31.636: I/System.out(1250): 77777777 
02-01 05:09:31.646: I/System.out(1250): 7777888888 
02-01 05:09:31.656: I/System.out(1250): 33333333 
02-01 05:09:31.756: I/System.out(1250): 1111111 
02-01 05:09:31.756: W/Trace(1250): Unexpected value from nativeGetEnabledTags: 0 
02-01 05:09:31.756: E/InputEventReceiver(1250): Exception dispatching input event. 
02-01 05:09:31.766: E/MessageQueue-JNI(1250): Exception in MessageQueue callback: handleReceiveCallback 
02-01 05:09:31.836: D/dalvikvm(1250): GC_CONCURRENT freed 275K, 11% free 3508K/3904K, paused 35ms+27ms, total 163ms 
02-01 05:09:31.926: E/MessageQueue-JNI(1250): java.lang.NullPointerException 
02-01 05:09:31.926: E/MessageQueue-JNI(1250): at com.sygnet.locationingooglemap.BalloonOverlayView.setupView(BalloonOverlayView.java:57) 
02-01 05:09:31.926: E/MessageQueue-JNI(1250): at com.sygnet.locationingooglemap.BalloonOverlayView.<init>(BalloonOverlayView.java:38) 
02-01 05:09:31.926: E/MessageQueue-JNI(1250): at com.sygnet.locationingooglemap.BalloonItemizedOverlay.createBalloonOverlayView(BalloonItemizedOverlay.java:87) 
02-01 05:09:31.926: E/MessageQueue-JNI(1250): at com.sygnet.locationingooglemap.BalloonItemizedOverlay.createAndDisplayBalloonOverlay(BalloonItemizedOverlay.java:188) 
02-01 05:09:31.926: E/MessageQueue-JNI(1250): at com.sygnet.locationingooglemap.BalloonItemizedOverlay.onTap(BalloonItemizedOverlay.java:76) 
02-01 05:09:31.926: E/MessageQueue-JNI(1250): at com.google.android.maps.ItemizedOverlay.onTap(ItemizedOverlay.java:453) 
02-01 05:09:31.926: E/MessageQueue-JNI(1250): at com.google.android.maps.OverlayBundle.onTap(OverlayBundle.java:83) 
02-01 05:09:31.926: E/MessageQueue-JNI(1250): at com.google.android.maps.MapView$1.onSingleTapUp(MapView.java:358) 
02-01 05:09:31.926: E/MessageQueue-JNI(1250): at com.google.android.maps.GestureDetector.onTouchEvent(GestureDetector.java:562) 
02-01 05:09:31.926: E/MessageQueue-JNI(1250): at com.google.android.maps.MapView.onTouchEvent(MapView.java:685) 
02-01 05:09:31.926: E/MessageQueue-JNI(1250): at android.view.View.dispatchTouchEvent(View.java:7239) 
02-01 05:09:31.926: E/MessageQueue-JNI(1250): at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2168) 
02-01 05:09:31.926: E/MessageQueue-JNI(1250): at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:1903) 
02-01 05:09:31.926: E/MessageQueue-JNI(1250): at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2174) 
02-01 05:09:31.926: E/MessageQueue-JNI(1250): at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:1917) 
02-01 05:09:31.926: E/MessageQueue-JNI(1250): at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2174) 
02-01 05:09:31.926: E/MessageQueue-JNI(1250): at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:1917) 
02-01 05:09:31.926: E/MessageQueue-JNI(1250): at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2174) 
02-01 05:09:31.926: E/MessageQueue-JNI(1250): at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:1917) 
02-01 05:09:31.926: E/MessageQueue-JNI(1250): at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2174) 
02-01 05:09:31.926: E/MessageQueue-JNI(1250): at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:1917) 
02-01 05:09:31.926: E/MessageQueue-JNI(1250): at com.android.internal.policy.impl.PhoneWindow$DecorView.superDispatchTouchEvent(PhoneWindow.java:1953) 
02-01 05:09:31.926: E/MessageQueue-JNI(1250): at com.android.internal.policy.impl.PhoneWindow.superDispatchTouchEvent(PhoneWindow.java:1405) 
02-01 05:09:31.926: E/MessageQueue-JNI(1250): at android.app.Activity.dispatchTouchEvent(Activity.java:2410) 
02-01 05:09:31.926: E/MessageQueue-JNI(1250): at com.android.internal.policy.impl.PhoneWindow$DecorView.dispatchTouchEvent(PhoneWindow.java:1901) 
02-01 05:09:31.926: E/MessageQueue-JNI(1250): at android.view.View.dispatchPointerEvent(View.java:7419) 
02-01 05:09:31.926: E/MessageQueue-JNI(1250): at android.view.ViewRootImpl.deliverPointerEvent(ViewRootImpl.java:3220) 
02-01 05:09:31.926: E/MessageQueue-JNI(1250): at android.view.ViewRootImpl.deliverInputEvent(ViewRootImpl.java:3165) 
02-01 05:09:31.926: E/MessageQueue-JNI(1250): at android.view.ViewRootImpl.doProcessInputEvents(ViewRootImpl.java:4292) 
02-01 05:09:31.926: E/MessageQueue-JNI(1250): at android.view.ViewRootImpl.enqueueInputEvent(ViewRootImpl.java:4271) 
02-01 05:09:31.926: E/MessageQueue-JNI(1250): at android.view.ViewRootImpl$WindowInputEventReceiver.onInputEvent(ViewRootImpl.java:4363) 
02-01 05:09:31.926: E/MessageQueue-JNI(1250): at android.view.InputEventReceiver.dispatchInputEvent(InputEventReceiver.java:179) 
02-01 05:09:31.926: E/MessageQueue-JNI(1250): at android.os.MessageQueue.nativePollOnce(Native Method) 
02-01 05:09:31.926: E/MessageQueue-JNI(1250): at android.os.MessageQueue.next(MessageQueue.java:125) 
02-01 05:09:31.926: E/MessageQueue-JNI(1250): at android.os.Looper.loop(Looper.java:124) 
02-01 05:09:31.926: E/MessageQueue-JNI(1250): at android.app.ActivityThread.main(ActivityThread.java:5039) 
02-01 05:09:31.926: E/MessageQueue-JNI(1250): at java.lang.reflect.Method.invokeNative(Native Method) 
02-01 05:09:31.926: E/MessageQueue-JNI(1250): at java.lang.reflect.Method.invoke(Method.java:511) 
02-01 05:09:31.926: E/MessageQueue-JNI(1250): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:793) 
02-01 05:09:31.926: E/MessageQueue-JNI(1250): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:560) 
02-01 05:09:31.926: E/MessageQueue-JNI(1250): at dalvik.system.NativeStart.main(Native Method) 
02-01 05:09:32.006: D/AndroidRuntime(1250): Shutting down VM 
02-01 05:09:32.006: W/dalvikvm(1250): threadid=1: thread exiting with uncaught exception (group=0x40a70930) 
02-01 05:09:32.096: E/AndroidRuntime(1250): FATAL EXCEPTION: main 
02-01 05:09:32.096: E/AndroidRuntime(1250): java.lang.NullPointerException 
02-01 05:09:32.096: E/AndroidRuntime(1250):  at com.sygnet.locationingooglemap.BalloonOverlayView.setupView(BalloonOverlayView.java:57) 
02-01 05:09:32.096: E/AndroidRuntime(1250):  at com.sygnet.locationingooglemap.BalloonOverlayView.<init>(BalloonOverlayView.java:38) 
02-01 05:09:32.096: E/AndroidRuntime(1250):  at com.sygnet.locationingooglemap.BalloonItemizedOverlay.createBalloonOverlayView(BalloonItemizedOverlay.java:87) 
02-01 05:09:32.096: E/AndroidRuntime(1250):  at com.sygnet.locationingooglemap.BalloonItemizedOverlay.createAndDisplayBalloonOverlay(BalloonItemizedOverlay.java:188) 
02-01 05:09:32.096: E/AndroidRuntime(1250):  at com.sygnet.locationingooglemap.BalloonItemizedOverlay.onTap(BalloonItemizedOverlay.java:76) 
02-01 05:09:32.096: E/AndroidRuntime(1250): at com.google.android.maps.ItemizedOverlay.onTap(ItemizedOverlay.java:453) 
02-01 05:09:32.096: E/AndroidRuntime(1250): at com.google.android.maps.OverlayBundle.onTap(OverlayBundle.java:83) 
02-01 05:09:32.096: E/AndroidRuntime(1250):  at com.google.android.maps.MapView$1.onSingleTapUp(MapView.java:358) 
02-01 05:09:32.096: E/AndroidRuntime(1250):  at com.google.android.maps.GestureDetector.onTouchEvent(GestureDetector.java:562) 
02-01 05:09:32.096: E/AndroidRuntime(1250):  at com.google.android.maps.MapView.onTouchEvent(MapView.java:685) 
02-01 05:09:32.096: E/AndroidRuntime(1250):  at android.view.View.dispatchTouchEvent(View.java:7239) 
02-01 05:09:32.096: E/AndroidRuntime(1250):  at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2168) 
02-01 05:09:32.096: E/AndroidRuntime(1250):  at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:1903) 
02-01 05:09:32.096: E/AndroidRuntime(1250):  at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2174) 
02-01 05:09:32.096: E/AndroidRuntime(1250):  at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:1917) 
02-01 05:09:32.096: E/AndroidRuntime(1250):  at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2174) 
02-01 05:09:32.096: E/AndroidRuntime(1250):  at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:1917) 
02-01 05:09:32.096: E/AndroidRuntime(1250):  at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2174) 
02-01 05:09:32.096: E/AndroidRuntime(1250):  at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:1917) 
02-01 05:09:32.096: E/AndroidRuntime(1250):  at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2174) 
02-01 05:09:32.096: E/AndroidRuntime(1250):  at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:1917) 
02-01 05:09:32.096: E/AndroidRuntime(1250):  at com.android.internal.policy.impl.PhoneWindow$DecorView.superDispatchTouchEvent(PhoneWindow.java:1953) 
02-01 05:09:32.096: E/AndroidRuntime(1250):  at com.android.internal.policy.impl.PhoneWindow.superDispatchTouchEvent(PhoneWindow.java:1405) 
02-01 05:09:32.096: E/AndroidRuntime(1250):  at android.app.Activity.dispatchTouchEvent(Activity.java:2410) 
02-01 05:09:32.096: E/AndroidRuntime(1250):  at com.android.internal.policy.impl.PhoneWindow$DecorView.dispatchTouchEvent(PhoneWindow.java:1901) 
02-01 05:09:32.096: E/AndroidRuntime(1250): at android.view.View.dispatchPointerEvent(View.java:7419) 
02-01 05:09:32.096: E/AndroidRuntime(1250):  at android.view.ViewRootImpl.deliverPointerEvent(ViewRootImpl.java:3220) 
02-01 05:09:32.096: E/AndroidRuntime(1250):  at android.view.ViewRootImpl.deliverInputEvent(ViewRootImpl.java:3165) 
02-01 05:09:32.096: E/AndroidRuntime(1250):  at android.view.ViewRootImpl.doProcessInputEvents(ViewRootImpl.java:4292) 
02-01 05:09:32.096: E/AndroidRuntime(1250):  at android.view.ViewRootImpl.enqueueInputEvent(ViewRootImpl.java:4271) 
02-01 05:09:32.096: E/AndroidRuntime(1250): at android.view.ViewRootImpl$WindowInputEventReceiver.onInputEvent(ViewRootImpl.java:4363) 
02-01 05:09:32.096: E/AndroidRuntime(1250):  at android.view.InputEventReceiver.dispatchInputEvent(InputEventReceiver.java:179) 
02-01 05:09:32.096: E/AndroidRuntime(1250):  at android.os.MessageQueue.nativePollOnce(Native Method) 
02-01 05:09:32.096: E/AndroidRuntime(1250):  at android.os.MessageQueue.next(MessageQueue.java:125) 
02-01 05:09:32.096: E/AndroidRuntime(1250):  at android.os.Looper.loop(Looper.java:124) 
02-01 05:09:32.096: E/AndroidRuntime(1250):  at android.app.ActivityThread.main(ActivityThread.java:5039) 
02-01 05:09:32.096: E/AndroidRuntime(1250):  at java.lang.reflect.Method.invokeNative(Native Method) 
02-01 05:09:32.096: E/AndroidRuntime(1250):  at java.lang.reflect.Method.invoke(Method.java:511) 
02-01 05:09:32.096: E/AndroidRuntime(1250):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:793) 
02-01 05:09:32.096: E/AndroidRuntime(1250):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:560) 
02-01 05:09:32.096: E/AndroidRuntime(1250): at dalvik.system.NativeStart.main(Native Method)

這是BalloonItemizedOverlay.java

public abstract class BalloonItemizedOverlay<Item extends OverlayItem> extends ItemizedOverlay<Item> { 

private static final long BALLOON_INFLATION_TIME = 300; 
private static Handler handler = new Handler(); 

private MapView mapView; 
private BalloonOverlayView<Item> balloonView; 
private View clickRegion; 
private View closeRegion; 
private int viewOffset; 
final MapController mc; 
private Item currentFocusedItem; 
private int currentFocusedIndex; 

private boolean showClose = true; 
private boolean showDisclosure = false; 
private boolean snapToCenter = true; 
private static boolean isInflating = false; 

public BalloonItemizedOverlay(Drawable defaultMarker, MapView mapView) { 
    super(defaultMarker); 
    this.mapView = mapView; 
    viewOffset = 0; 
    mc = mapView.getController(); 
} 

public void setBalloonBottomOffset(int pixels) { 
    viewOffset = pixels; 
} 
public int getBalloonBottomOffset() { 
    return viewOffset; 
} 

protected boolean onBalloonTap(int index, Item item) { 
    return false; 
} 

protected void onBalloonOpen(int index) {} 

@Override 
public final boolean onTap(int index) { 

    handler.removeCallbacks(finishBalloonInflation); 
    isInflating = true; 
    handler.postDelayed(finishBalloonInflation, BALLOON_INFLATION_TIME); 
    System.out.println("6666666666666"); 
    currentFocusedIndex = index; 
    currentFocusedItem = createItem(index); 
    setLastFocusedIndex(index); 

    onBalloonOpen(index); 
    createAndDisplayBalloonOverlay(); 

    if (snapToCenter) { 
     mc.animateTo(currentFocusedItem.getPoint()); 
    } 

    return true; 
} 

protected BalloonOverlayView<Item> createBalloonOverlayView() { 
    System.out.println("77777777"); 
    return new BalloonOverlayView<Item>(getMapView().getContext(), getBalloonBottomOffset()); 
} 

protected MapView getMapView() { 
    System.out.println("7777888888"); 
    return mapView; 

} 

public void hideBalloon() { 
    if (balloonView != null) { 
     balloonView.setVisibility(View.GONE); 
     System.out.println("888888"); 
    } 
    currentFocusedItem = null; 
} 

private void hideOtherBalloons(List<Overlay> overlays) { 

    for (Overlay overlay : overlays) { 
     if (overlay instanceof BalloonItemizedOverlay<?> && overlay != this) { 
      ((BalloonItemizedOverlay<?>) overlay).hideBalloon(); 
      System.out.println("88886666666666688"); 
     } 
    }  
} 

public void hideAllBalloons() { 
    if (!isInflating) { 
     List<Overlay> mapOverlays = mapView.getOverlays(); 
     if (mapOverlays.size() > 1) { 
      hideOtherBalloons(mapOverlays); 
     } 
     hideBalloon(); 
    } 
} 

private OnTouchListener createBalloonTouchListener() { 
    return new OnTouchListener() { 

     double startX; 
     double startY; 

     public boolean onTouch(View v, MotionEvent event) { 

//    View l = ((View) v.getParent()).findViewById(R.id.balloon_main_layout); 
      Drawable d = v.getBackground(); 

      //Event Action Down 
      if (event.getAction() == MotionEvent.ACTION_DOWN) { 
       int[] states = {android.R.attr.state_pressed}; 
       if (d.setState(states)) { 
        d.invalidateSelf(); 
        System.out.println("12122121212"); 
       } 
       startX = event.getX(); 
       startY = event.getY(); 
       System.out.println("1111222211112222"); 
       return true; 
      } 

      //Event Action Up 
      else if (event.getAction() == MotionEvent.ACTION_UP) { 
       int newStates[] = {}; 
       if (d.setState(newStates)) { 
        d.invalidateSelf(); 
        System.out.println("0000011111"); 
       } 
       if (Math.abs(startX - event.getX()) < 40 && Math.abs(startY - event.getY()) < 40) { 
        // call overridden method 
        onBalloonTap(currentFocusedIndex, currentFocusedItem); 
        System.out.println("12345678"); 
       } 
       return true; 
      } else { 
       return false; 
      }    
     } 
    }; 
} 

@Override 
public Item getFocus() { 
    return currentFocusedItem; 
} 

@Override 
public void setFocus(Item item) { 
    super.setFocus(item); 
    currentFocusedIndex = getLastFocusedIndex(); 
    currentFocusedItem = item; 
    if (currentFocusedItem == null) { 
     hideBalloon(); 
    } else { 
     createAndDisplayBalloonOverlay(); 
    } 
} 

private boolean createAndDisplayBalloonOverlay(){ 
    boolean isRecycled; 
    if (balloonView == null) { 
     balloonView = createBalloonOverlayView(); 
     clickRegion = (View) balloonView.findViewById(R.id.balloon_inner_layout); 

     clickRegion.setOnTouchListener(createBalloonTouchListener()); 
     closeRegion = (View) balloonView.findViewById(R.id.balloon_close); 
     if (closeRegion != null) { 
      if (!showClose) { 
       closeRegion.setVisibility(View.GONE); 
       System.out.println("aaaaaaaa"); 
      } else { 
       closeRegion.setOnClickListener(new OnClickListener() { 
        @Override 
        public void onClick(View v) { 
         hideBalloon(); 
         System.out.println("bbbbbbb"); 
        } 
       }); 
      } 
     } 

     if (showDisclosure && !showClose) { 
      View v = balloonView.findViewById(R.id.balloon_disclosure); 
      if (v != null) { 
       v.setVisibility(View.VISIBLE); 
       System.out.println("cccccccc"); 
      } 
     } 
     isRecycled = false; 
    } 
    else { 
     isRecycled = true; 
    } 

    balloonView.setVisibility(View.GONE); 

    List<Overlay> mapOverlays = mapView.getOverlays(); 
    if (mapOverlays.size() > 1) { 
     hideOtherBalloons(mapOverlays); 
    } 

    if (currentFocusedItem != null) 
     balloonView.setData(currentFocusedItem); 

    GeoPoint point = currentFocusedItem.getPoint(); 
    MapView.LayoutParams params = new MapView.LayoutParams(
      LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT, point, 
      MapView.LayoutParams.BOTTOM_CENTER); 
    params.mode = MapView.LayoutParams.MODE_MAP; 

    balloonView.setVisibility(View.VISIBLE); 
    System.out.println("dddddddd"); 
    if (isRecycled) { 
     balloonView.setLayoutParams(params); 
    } 
    else { 
     mapView.addView(balloonView, params); 
    } 

    return isRecycled; 
} 

public void setShowClose(boolean showClose) { 
    this.showClose = showClose; 
} 

public void setShowDisclosure(boolean showDisclosure) { 
    this.showDisclosure = showDisclosure; 
} 

public void setSnapToCenter(boolean snapToCenter) { 
    this.snapToCenter = snapToCenter; 
} 

public static boolean isInflating() { 
    return isInflating; 
} 

private static Runnable finishBalloonInflation = new Runnable() { 
    public void run() { 
     isInflating = false; 
    } 
}; 

}

這是BalloonOverlayView.java

public class BalloonOverlayView<Item extends OverlayItem> extends FrameLayout { 

LinearLayout layout; 
private TextView title; 
MainActivity main; 
private CharSequence tvLocation; 


public BalloonOverlayView(Context context, int balloonBottomOffset) { 

    super(context); 

    setPadding(10, 0, 10, balloonBottomOffset); 

    layout = new LimitLinearLayout(context); 
    layout.setVisibility(VISIBLE); 

    setupView(context, layout); 

    FrameLayout.LayoutParams params = new FrameLayout.LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT); 
    params.gravity = Gravity.NO_GRAVITY; 

    addView(layout, params); 
} 

protected void setupView(Context context, ViewGroup parent) { 
    try { 
    LayoutInflater inflater = (LayoutInflater) context 
      .getSystemService(Context.LAYOUT_INFLATER_SERVICE); 
    View v = inflater.inflate(R.layout.balloon_overlay, parent); 
    title = (TextView) v.findViewById(R.id.balloon_item_title); 
    System.out.println("00000000000"); 
    } 
    catch(Exception e) 
    { 
     System.out.println("1111111"); 
     title.setText(tvLocation); 
    } 

//  title.setText(tvLocation); 
} 

public void setData(Item item) { 
    layout.setVisibility(VISIBLE); 
    setBalloonData(item, layout); 
    System.out.println("1113333"); 
} 

protected void setBalloonData(Item item, ViewGroup parent) { 
    if (item.getTitle() != null) { 
     title.setVisibility(VISIBLE); 
     title.setText(item.getTitle()); 
     title.setText(tvLocation); 

     System.out.println("222222222"); 
    } else { 
     title.setText(""); 
     title.setVisibility(GONE); 
     System.out.println("111222222"); 
    } 
} 

private class LimitLinearLayout extends LinearLayout { 

    private static final int MAX_WIDTH_DP = 280; 

    final float SCALE = getContext().getResources().getDisplayMetrics().density; 

    public LimitLinearLayout(Context context) { 
     super(context); 
     System.out.println("33333333"); 
    } 

    public LimitLinearLayout(Context context, AttributeSet attrs) { 
     super(context, attrs); 
     System.out.println("444444"); 
    } 

    @Override 
    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { 
     int mode = MeasureSpec.getMode(widthMeasureSpec); 
     int measuredWidth = MeasureSpec.getSize(widthMeasureSpec); 
     int adjustedMaxWidth = (int)(MAX_WIDTH_DP * SCALE + 0.5f); 
     int adjustedWidth = Math.min(measuredWidth, adjustedMaxWidth); 
     int adjustedWidthMeasureSpec = MeasureSpec.makeMeasureSpec(adjustedWidth, mode); 
     System.out.println("555555555"); 
     super.onMeasure(adjustedWidthMeasureSpec, heightMeasureSpec); 
    } 
} 

}

這是balloon_overlay.xml

<?xml version="1.0" encoding="utf-8"?> 
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" 
android:id="@+id/balloon_main_layout" 
android:layout_width="wrap_content" 
android:layout_height="wrap_content" 
android:background="@drawable/balloon_overlay_bg_selector" 
android:minWidth="200dip" 
android:orientation="horizontal" 
android:paddingBottom="25dip" 
android:paddingLeft="10dip" 
android:paddingRight="0dip" 
android:paddingTop="0dip" > 

<LinearLayout 
    android:id="@+id/balloon_inner_layout" 
    android:layout_width="fill_parent" 
    android:layout_height="wrap_content" 
    android:layout_marginTop="6dip" 
    android:layout_weight="1" > 

    <LinearLayout 
     android:layout_width="0dp" 
     android:layout_height="wrap_content" 
     android:gravity="center_vertical" 
     android:minHeight="40dip" 
     android:orientation="vertical" > 

     <TextView 
      android:id="@+id/balloon_item_title" 
      android:layout_width="wrap_content" 
      android:layout_height="wrap_content" 
      android:textColor="@android:color/primary_text_light" 
      android:textSize="@string/txtsize" 
      android:text="" /> 

    </LinearLayout> 
    <ImageView 
     android:id="@+id/balloon_disclosure" 
     android:layout_width="wrap_content" 
     android:layout_height="fill_parent" 
     android:layout_gravity="center_vertical" 
     android:src="@drawable/balloon_disclosure" 
     android:visibility="gone" /> 

</LinearLayout> 

<ImageView 
    android:id="@+id/balloon_close" 
    android:layout_width="wrap_content" 
    android:layout_height="wrap_content" 
    android:paddingBottom="10dip" 
    android:paddingLeft="10dip" 
    android:paddingRight="5dip" 
    android:paddingTop="5dip" 
    android:src="@drawable/balloon_overlay_close" /> 

</LinearLayout>

來源

2013-02-01 user2021654

使用此代碼，它的正常工作對我來說：

public class CurrentLocationOverlay extends ItemizedOverlay<OverlayItem>{ 

    private ArrayList<OverlayItem> mapOverlays = new ArrayList<OverlayItem>(); 
    private MapView mapView; 
    private Context context; 

    //pin point drawable 
    private Drawable marker; 

    //balloon background 
    private Drawable viewDrawable; 

    private LinearLayout viewBubble; 

    public CurrentLocationOverlay(Drawable defaultMarker) { 
     super(boundCenterBottom(defaultMarker)); 
    } 

    /** 
    * 
    * @param defaultMarker 
    * @param activity 
    * @param context 
    * @param mapView 
    */ 
    public CurrentLocationOverlay(Drawable defaultMarker , Context context, MapView mapView) { 
     this(boundCenterBottom(defaultMarker)); 
     this.mapView = mapView; 
     this.context = context; 
     marker = defaultMarker; 
     growPopUpAnim = AnimationUtils.loadAnimation(context, R.anim.grow_from_bottom); 
     viewDrawable = context.getResources().getDrawable(R.drawable.currlocpopup); 
    } 


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

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


    /** 
    * 
    * @param gp 
    * @param title 
    * @param msg 
    */ 
    public void addOverlay(GeoPoint gp , String title , String msg) { 
     OverlayItem overlay = new OverlayItem(gp, title, msg); 
     mapOverlays.add(overlay); 
     this.populate(); 
    } 


    @Override 
    protected boolean onTap(int index) { 
     final int position = index; 
      Log.v("Overlay index", "" + position); 
      GeoPoint p = mapOverlays.get(index).getPoint(); 
      addBubble(p , position); 
     return true; 
    } 



    /** 
    * 
    * @param point 
    * @param mapView 
    */ 
    private void addBubble(GeoPoint point , int index) { 
     dimissbubble(mapView); 
     // if there isn't any bubble on the screen enter 
     if (viewBubble == null) { 
      viewBubble = new LinearLayout(context); 
      viewBubble.bringToFront(); 
      viewBubble.setBackgroundDrawable(viewDrawable); 

      TextView tv = new TextView(context); 
      tv.setText(mapOverlays.get(index).getTitle()); 
      tv.setTextSize(16); 
      tv.setTextColor(Color.WHITE); 
      tv.setTypeface(null, Typeface.BOLD); 


      viewBubble.setGravity(Gravity.CENTER_HORIZONTAL); 

      viewBubble.setPadding(10, 10, 10, 10); 

      viewBubble.addView(tv); 

      MapView.LayoutParams mvlp = new MapView.LayoutParams(
        MapView.LayoutParams.WRAP_CONTENT, 
        MapView.LayoutParams.WRAP_CONTENT, point, 
        0, -marker.getIntrinsicHeight(), 
        MapView.LayoutParams.BOTTOM_CENTER); 

      mvlp.mode = MapView.LayoutParams.MODE_MAP; 

      mapView.addView(viewBubble, mvlp); 
      viewBubble.startAnimation(growPopUpAnim); 

      // And the event. 
      viewBubble.setOnClickListener(new OnClickListener() { 
       // When we touch the bubble it is removed. And make null 
       // viewBubble to reuse it. 
       @Override 
       public void onClick(View v) { 
        mapView.removeView(viewBubble); 
        viewBubble = null; 
       } 
      }); 
     } 
    } 


    /** 
    * 
    * @param mapView 
    */ 
    private void dimissbubble(MapView mapView) { 
     if (viewBubble != null) { 
      mapView.removeView(viewBubble); 
      viewBubble = null; 
     } 
    } 
}

補充一點：

GeoPoint p = new GeoPoint(
         (int) (location.getLatitude() * 1E6), 
         (int) (location.getLongitude() * 1E6)); 

CurrentLocationOverlay currentLocationOverlay = new CurrentLocationOverlay(mDrawable,context, mapView); 
currentLocationOverlay.addOverlay(p ,"Current Location" , ""); 
mapView.getOverlays().add(currentLocationOverlay);

來源

2013-02-01 06:42:58 Anand

當我創建（R.anim.grow_from_bottom ）這個。以前我的網不是working.please幫我 – user2021654

只是評論這一行，我用於彈出動畫.. – Anand

也是這一個：viewBubble.startAnimation（growPopUpAnim）; – Anand

谷歌地圖當前位置氣球覆蓋？

回答

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