Google maps API in Android

Question

我正在尝试实现一种功能，以便当用户在文本字段中输入地址并单击按钮时，该地址应复制到Google地图的目标字段中，并且用户位置应设置为“我的位置”（他的当前位置）。

Answer 1

You can open google map in following way:

String CURRENT_LOCATION = "current_location_latitude, current_location_longitude";
String DESTINATION_LOCATION = "address_from_your_text_view";

Intent intent = new Intent(android.content.Intent.ACTION_VIEW,
Uri.parse("http://maps.google.com/maps?saddr="+ CURRENT_LOCATION +" daddr="+DESTINATION_LOCATION));
startActivity(intent);

Note: You should get device/user current location from LocationManager

Answer 2

In order to show route on Google Map, Just call an intent which passes current and destination latitude and longitude. You may also pass address in any case if don't know lat-long. After doing this, its Google Map's job to show location. You may also show street view.

In below code, there are three parameters : current_lat, current_longi, dest_address

 final Intent intent = new Intent(Intent.ACTION_VIEW,
Uri.parse("http://maps.google.com/maps?" 
+ "saddr="+ current_lat+","+current_longi + "&daddr="+dest_address ));

intent.setClassName("com.google.android.apps.maps","com.google.android.maps.MapsActivity");

startActivity(intent); 

If you have current address and destination address, then you can write like this :

Uri.parse("http://maps.google.com/maps?" 
+ "saddr="+curr_address+ "&daddr="+dest_address ));

If you have current and destination latitude and longitude both then you can write like this :

Uri.parse("http://maps.google.com/maps?" 
+ "saddr="+ current_lat+","+current_longi + "&daddr="+ destt_lat+","+dest_longi  ));

When you call this intent, Google Map shows option whether to draw route by bus or by walk.