[Android]_ch9.12_GoogleMap計算兩點距離

[Android]_ch9.12_GoogleMap計算兩點距離

計算2點間距離

呼叫Location.distanceBetween(double
startLatitude,
double startLongitude,
double endLatitude,
double endLongitude,
float[] results)並傳入起點與終點的緯經度可以算出距離（公尺），計算結果存入results參數

btn1.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();

float results[]=new float[1];

Location.distanceBetween(startLatitude, startLongitude, endLatitude, endLongitude, results);

tv2.setText("距離"+name+": "+results[0]+" 公尺");

}

});