Android calls google map to generate the roadmap implementation code

The Android program calls native googlemap, passes the start and end locations, and generates a roadmap

 
if (wodeweizhiPoint != null) { 
if (wodeweizhiPoint.getLatitudeE6() != 0) { 
float chufajingdu = (float) (wodeweizhiPoint.getLongitudeE6() / 1E6); 
float chufaweidu = (float) (wodeweizhiPoint.getLatitudeE6() / 1E6); 
float daodajingdu = (float) (AppConstant.PointZuoBiao.liangxiangDaoHangPoint.getLongitudeE6() / 1E6); 
float daodaweidu = (float) (AppConstant.PointZuoBiao.liangxiangDaoHangPoint.getLatitudeE6() / 1E6); 
//  tag 1 A point  
// Intent i = new 
// Intent(Intent.ACTION_VIEW,Uri.parse("http://ditu.google.cn/maps?hl=zh&mrt=loc&q=31.249351,121.45905")); 

//  The route from where to where  
Intent i = new Intent(Intent.ACTION_VIEW,Uri.parse("http://ditu.google.cn/maps?f=d&source=s_d&saddr=" 
+ chufaweidu 
+ "," 
+ chufajingdu 
+ "&daddr=" 
+ daodaweidu 
+ "," 
+ daodajingdu + "&hl=zh")); 
// If you force it googlemap When the map client opens, add the following two sentences  
i.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK& Intent.FLAG_ACTIVITY_EXCLUDE_FROM_RECENTS); 
i.setClassName("com.google.android.apps.maps","com.google.android.maps.MapsActivity"); 
startActivity(i); 
} 
} else { 
AlertUtils.ToastAlert(mContext,  "Unable to obtain your location, so temporarily unable to provide navigation" ); 
}