android googlemap问题,求帮助...

// 当用户点击标记时，执行
	@Override
	protected boolean onTap(int index) {
		Toast.makeText(mContext,"点击onTab方法", Toast.LENGTH_LONG).show();
		MapView.LayoutParams geoLP = (MapView.LayoutParams)mContext.popView.getLayoutParams();
		geoLP.point = mOverlays.get(index).getPoint();
		mContext.mMapView.updateViewLayout(mContext.popView, geoLP);
		mContext.popView.setVisibility(View.VISIBLE);
		textView1 = (TextView) mContext.findViewById(R.id.map_bubbleTitle);
		textView2 = (TextView) mContext.findViewById(R.id.map_bubbleText);
		textView1.setText(mOverlays.get(index).getTitle());
		textView2.setText(mOverlays.get(index).getSnippet());
	
		mContext.popView.setVisibility(View.VISIBLE);
		RelativeLayout iv = (RelativeLayout) mContext.popView.findViewById(R.id.map_bubblebtn);
		iv.setOnClickListener(new View.OnClickListener() {
			
			@Override
			public void onClick(View v) {
				mContext.popView.setVisibility(View.GONE);
			}
		});
		return true;
	}

private void initPopView() {
		Toast.makeText(MainActivity.this, "实例化popview的方法", Toast.LENGTH_LONG).show();
		if (null == popView) {
			popView = getLayoutInflater().inflate(R.layout.overlay_popup, null);
			mMapView.addView(popView, new MapView.LayoutParams(
					MapView.LayoutParams.WRAP_CONTENT,
					MapView.LayoutParams.WRAP_CONTENT, null,
					MapView.LayoutParams.BOTTOM_CENTER));
			popView.setVisibility(View.GONE);
		}

	}

public void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.main);
		mMapView = (MapView) findViewById(R.id.mapview);
		//设置显示模式
		mMapView.setTraffic(false);
		mMapView.setSatellite(false);
		mMapView.setStreetView(true);
		//设置缩放
		mMapView.setBuiltInZoomControls(true); 
		mapController = mMapView.getController();
		mapController.setZoom(intZoomLevel);
	}