百度地图API安卓版的GPS定位

在官方程序中略为提及，但显然不够清楚，幸好官方有DemoApp，特将此代码提出。

 

1 添加LocationListerner变量

LocationListener mLocationListener = null; // create时注册此listener，Destroy时需要Remove

2 在OnCreate中注册定位监听器事件

mLocationListener = new LocationListener() {

public void onLocationChanged(Location location) {
	if (location != null) {
					String strLog = String.format("您当前的位置:\r\n" + "纬度:%f\r\n"
							+ "经度:%f", location.getLongitude(),
							location.getLatitude());

					TextView mainText = (TextView) findViewById(R.id.textview);
					mainText.setText(strLog);
				}
				if (location != null) {
					GeoPoint pt = new GeoPoint(
							(int) (location.getLatitude() * 1e6),
							(int) (location.getLongitude() * 1e6));
					mMapView.getController().animateTo(pt);
				}
			}
		};

3 添加MyLocationOverlay变量

MyLocationOverlay mLocationOverlay = null;

4 在OnCreate中添加该层

 

mLocationOverlay = new MyLocationOverlay(this, mMapView);
		mMapView.getOverlays().add(mLocationOverlay);

5 最后在Activity重载两个函数

@Override
	protected void onPause() {
		// TODO Auto-generated method stub
		HZBikeApp app = (HZBikeApp) this.getApplication();
		app.mBMapMan.getLocationManager().removeUpdates(mLocationListener);
		mLocationOverlay.disableMyLocation();
		mLocationOverlay.disableCompass(); // 关闭指南针
		app.mBMapMan.stop();	// 停止地图服务
		super.onPause();
	}

	@Override
	protected void onResume() {
		// TODO Auto-generated method stub
		HZBikeApp app = (HZBikeApp) this.getApplication();
		app.mBMapMan.getLocationManager().requestLocationUpdates(
				mLocationListener);
		mLocationOverlay.enableMyLocation();
		mLocationOverlay.enableCompass(); // 打开指南针
		app.mBMapMan.start();	// 恢复地图服务
		super.onResume();
	}