get GPS information (Android)

activity_main.xml

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    tools:context=".MainActivity" >

    <TextView
        android:id="@+id/provider"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content" />

    <TextView
        android:id="@+id/latitude"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content" />

    <TextView
        android:id="@+id/longitude"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content" />

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginTop="48dip"
        android:text="GMS" />

    <TextView
        android:id="@+id/gms_latitude"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content" />

    <TextView
        android:id="@+id/gms_longitude"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content" />

</LinearLayout>

AndroidManifest.xml

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="daichan4649.gps"
    android:versionCode="1"
    android:versionName="1.0" >

    <uses-sdk
        android:minSdkVersion="15"
        android:targetSdkVersion="17" />

    <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />

    <application
        android:allowBackup="true"
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/AppTheme" >
        <activity
            android:name="daichan4649.gps.MainActivity"
            android:label="@string/app_name" >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />
                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
    </application>

</manifest>

GpsUtil.java

package daichan4649.gps;

public class GpsUtil {

    // http://en.wikipedia.org/wiki/Geographic_coordinate_conversion
    public static String convertDecimal2DMS(double coord) {
        String output, degrees, minutes, seconds;

        // gets the modulus the coordinate divided by one (MOD1).
        // in other words gets all the numbers after the decimal point.
        // e.g. mod = 87.728056 % 1 == 0.728056
        //
        // next get the integer part of the coord. On other words the whole number part.
        // e.g. intPart = 87

        double mod = coord % 1;
        int intPart = (int) coord;

        //set degrees to the value of intPart
        //e.g. degrees = "87"

        degrees = String.valueOf(intPart);

        // next times the MOD1 of degrees by 60 so we can find the integer part for minutes.
        // get the MOD1 of the new coord to find the numbers after the decimal point.
        // e.g. coord = 0.728056 * 60 == 43.68336
        //      mod = 43.68336 % 1 == 0.68336
        //
        // next get the value of the integer part of the coord.
        // e.g. intPart = 43

        coord = mod * 60;
        mod = coord % 1;
        intPart = (int) coord;

        // set minutes to the value of intPart.
        // e.g. minutes = "43"
        minutes = String.valueOf(intPart);

        //do the same again for minutes
        //e.g. coord = 0.68336 * 60 == 41.0016
        //e.g. intPart = 41
        coord = mod * 60;
        intPart = (int) coord;

        // set seconds to the value of intPart.
        // e.g. seconds = "41"
        seconds = String.valueOf(intPart);

        // I used this format for android but you can change it
        // to return in whatever format you like
        // e.g. output = "87/1,43/1,41/1"
        output = degrees + "/1," + minutes + "/1," + seconds + "/1";

        //Standard output of D°M′S″
        //output = degrees + "°" + minutes + "'" + seconds + "\"";

        return output;
    }

    public static double convertDMS2Decimal(String hemisphereOUmeridien, double degres, double minutes, double secondes) {
        double LatOrLon = 0;
        double signe = 1.0;

        if ((hemisphereOUmeridien.equals("W")) || (hemisphereOUmeridien.equals("S"))) {
            signe = -1.0;
        }
        LatOrLon = signe * (Math.floor(degres) + Math.floor(minutes) / 60.0 + secondes / 3600.0);

        return (LatOrLon);
    }

    public static String getLatitudeRef(double latitude) {
        return latitude < 0.0d ? "S" : "N";
    }

    public static String getLongitudeRef(double longitude) {
        return longitude < 0.0d ? "W" : "E";
    }
}

MainActivity.java

package daichan4649.gps;

import android.app.Activity;
import android.content.Context;
import android.location.Criteria;
import android.location.Location;
import android.location.LocationListener;
import android.location.LocationManager;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.TextView;

public class MainActivity extends Activity {

    private LocationManager mLocationManager = null;
    private TextView mProvider;
    private TextView mLatitude;
    private TextView mLongitude;
    private TextView mGmsLatitude;
    private TextView mGmsLongitude;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        mLocationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
        mProvider = (TextView) findViewById(R.id.provider);
        mLatitude = (TextView) findViewById(R.id.latitude);
        mLongitude = (TextView) findViewById(R.id.longitude);
        mGmsLatitude = (TextView) findViewById(R.id.gms_latitude);
        mGmsLongitude = (TextView) findViewById(R.id.gms_longitude);
    }

    private LocationListener mLocationListener = new LocationListener() {
        @Override
        public void onStatusChanged(String provider, int status, Bundle extras) {
        }

        @Override
        public void onProviderEnabled(String provider) {
        }

        @Override
        public void onProviderDisabled(String provider) {
        }

        @Override
        public void onLocationChanged(Location location) {
            // decimal
            double latitude = location.getLatitude();
            double longitude = location.getLongitude();
            mLatitude.setText(Double.toString(latitude));
            mLongitude.setText(Double.toString(longitude));

            // dms
            String dmsLatitude = GpsUtil.convertDecimal2DMS(latitude);
            String refLatitude = GpsUtil.getLatitudeRef(latitude);
            String dmsLongitude = GpsUtil.convertDecimal2DMS(longitude);
            String refLongitude = GpsUtil.getLongitudeRef(longitude);
            mGmsLatitude.setText(String.format("lat=%s ref=%s", dmsLatitude, refLatitude));
            mGmsLongitude.setText(String.format("long=%s ref=%s", dmsLongitude, refLongitude));
        }
    };

    @Override
    protected void onResume() {
        super.onResume();

        // GPS更新
        updateGpsInfo();
    }

    @Override
    protected void onPause() {
        super.onPause();
        mLocationManager.removeUpdates(mLocationListener);
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        getMenuInflater().inflate(R.menu.main, menu);
        return true;
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        switch (item.getItemId()) {
        case R.id.update:
            updateGpsInfo();
            break;
        }
        return super.onOptionsItemSelected(item);
    }

    private void updateGpsInfo() {
        String provider = getBestProvider();
        mLocationManager.requestLocationUpdates(provider, 0, 0, mLocationListener);

        mProvider.setText(provider);
        mLatitude.setText("update...");
        mLongitude.setText("update...");
        mGmsLatitude.setText("");
        mGmsLongitude.setText("");
    }

    private String getBestProvider() {
        Criteria criteria = new Criteria();

        // 精度
        criteria.setAccuracy(Criteria.ACCURACY_COARSE);

        // 消費電力
        criteria.setPowerRequirement(Criteria.POWER_LOW);

        return mLocationManager.getBestProvider(criteria, true);
    }
}