地址找尋經緯度

1. addrvsgp.xml

<?xml version="1.0" encoding="utf-8"?>

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"

    android:layout_width="match_parent"

    android:layout_height="match_parent"

    android:orientation="vertical" >

    <EditText

        android:id="@+id/etaddr2"

        android:layout_width="match_parent"

        android:layout_height="wrap_content"

        android:ems="10"

        android:text="台北市南京東路三段214號"

        android:textSize="20sp" >

        <requestFocus />

    </EditText>

    <TextView

        android:id="@+id/tvlatlong"

        android:layout_width="match_parent"

        android:layout_height="wrap_content"

        android:text="經緯度"

        android:textSize="20sp" />

    <Button

        android:id="@+id/bFind"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:text="Find" />

</LinearLayout>

2. FindLatLong.java

import java.io.IOException;

import java.util.List;

import android.app.Activity;

import android.location.Address;

import android.location.Geocoder;

import android.os.Bundle;

import android.util.Log;

import android.view.View;

import android.view.View.OnClickListener;

import android.widget.Button;

import android.widget.EditText;

import android.widget.TextView;

import android.widget.Toast;

public class FindLatLong extends Activity {

           double geoLatitude, geoLongitude;

           Button bt;

           EditText et;

           TextView tv;

           @Override

           protected void onCreate(Bundle savedInstanceState) {

                     super.onCreate(savedInstanceState);

                     setContentView(R.layout.addrvsgp);

                     bt = (Button) findViewById(R.id.bFind);

                     et = (EditText) findViewById(R.id.etaddr2);

                     tv = (TextView) findViewById(R.id.tvlatlong);

                     bt.setOnClickListener(new OnClickListener() {

                                @Override

                                public void onClick(View arg0) {

                                           // TODO Auto-generated method stub

                              getGPFromAddress(et.getText().toString());

                String msg=String.format("緯度:%s : 經度:%s",geoLatitude, geoLongitude);

                tv.setText(msg);

                                }

                     });

           }

           public void getGPFromAddress(String addr) {

                     if (!addr.equals("")) {

                                Geocoder geocoder = new Geocoder(this);

                                List<Address> addresses = null;

                                Address address = null;

                                try {                   

                                           addresses = geocoder.getFromLocationName(addr, 1);

                                } catch (IOException e) {

                                           e.printStackTrace();

                                }

                                if (addresses == null || addresses.isEmpty()) {

                                           Toast.makeText(this, "找不到該地址", Toast.LENGTH_SHORT).show();

                                } else {

                                           address = addresses.get(0);

                                           geoLatitude = address.getLatitude();

                                           geoLongitude = address.getLongitude();

                                           Log.e("Location",

                                                                address.getLatitude() + ":" + address.getLongitude());

                                }

                     } else {

                                Toast.makeText(this, "未輸入地址", Toast.LENGTH_SHORT).show();

                     }

           }

}