[Android]_ch9.13_GoogleMap導航功能

[Android]_ch9.13_GoogleMap導航功能

n導航功能

n透過HTTP協定傳送出發地與目的地資料，Google地圖伺服器就可以計算出該走哪條路

nString uriStr = String.format("http://maps.google.com/maps?f=d&saddr=%f,%f&daddr=%f,%f",fromLat, fromLng, toLat, toLng);

n

n可以將導航結果以內建的Google地圖應用程式來顯示

nIntent intent = new Intent();

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

nintent.setAction(android.content.Intent.ACTION_VIEW);

nintent.setData(Uri.parse(uriStr));

nstartActivity(intent);

btn2.setOnClickListener(new OnClickListener() {

@Override

public void onClick(View v) {

String name=et1.getText().toString();

Geocoder gc=new Geocoder(MainActivity.this);

List<Address> list=null;

Address address=null;

try {

list=gc.getFromLocationName(name, 1);

} catch (IOException e) {

// TODO Auto-generated catch block

e.printStackTrace();

}

if(list==null || list.isEmpty())

Toast.makeText(MainActivity.this, "找不到該位置!", Toast.LENGTH_SHORT).show();

else{

address=list.get(0);

}

double startLatitude=myLocation.getLatitude();

double startLongitude=myLocation.getLongitude();

double endLatitude=address.getLatitude();

double endLongitude=address.getLongitude();

String uriStr = String.format("http://maps.google.com/maps?f=d&saddr=%f,%f&daddr=%f,%f",startLatitude, startLongitude, endLatitude, endLongitude);

Intent intent = new Intent();

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

intent.setAction(android.content.Intent.ACTION_VIEW);

intent.setData(Uri.parse(uriStr));

startActivity(intent);



}

});