Mi punto en el mundo. Versión 1. Día 2. Curso de servicios de localización en Android. 2017.1

activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<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:gravity="center"
    android:orientation="vertical"
    tools:context="tech.alvarez.mipuntoenelmundo.MainActivity">

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="@string/latitud" />

    <TextView
        android:id="@+id/latitudTextView"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:textSize="24sp"
        tools:text="Aquí viene la latitud" />

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="@string/longitud" />

    <TextView
        android:id="@+id/longitudTextView"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:textSize="24sp"
        tools:text="Aquí viene la longitud" />

</LinearLayout>

build.gradle

apply plugin: 'com.android.application'

android {
    compileSdkVersion 25
    buildToolsVersion "25.0.2"
    defaultConfig {
        applicationId "tech.alvarez.mipuntoenelmundo"
        minSdkVersion 15
        targetSdkVersion 25
        versionCode 1
        versionName "1.0"
        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
    }
    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }
    }
}

dependencies {
    compile fileTree(dir: 'libs', include: ['*.jar'])
    androidTestCompile('com.android.support.test.espresso:espresso-core:2.2.2', {
        exclude group: 'com.android.support', module: 'support-annotations'
    })
    compile 'com.android.support:appcompat-v7:25.3.1'
    compile 'com.android.support.constraint:constraint-layout:1.0.2'
    testCompile 'junit:junit:4.12'

    compile 'com.google.android.gms:play-services-location:8.4.0'

}

MainActivity.java

package tech.alvarez.mipuntoenelmundo;

import android.location.Location;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.widget.TextView;

import com.google.android.gms.common.ConnectionResult;
import com.google.android.gms.common.api.GoogleApiClient;
import com.google.android.gms.location.LocationServices;

public class MainActivity extends AppCompatActivity implements GoogleApiClient.ConnectionCallbacks, GoogleApiClient.OnConnectionFailedListener {

    private TextView latitudTextView;
    private TextView longitudTextView;

    private GoogleApiClient googleApiClient;

    private Location ultimaUbicacion;

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

        latitudTextView = (TextView) findViewById(R.id.latitudTextView);
        longitudTextView = (TextView) findViewById(R.id.longitudTextView);

        googleApiClient = new GoogleApiClient.Builder(this)
                .addConnectionCallbacks(this)
                .addOnConnectionFailedListener(this)
                .addApi(LocationServices.API)
                .build();
    }

    @Override
    public void onConnected(Bundle bundle) {
        ultimaUbicacion = LocationServices.FusedLocationApi.getLastLocation(googleApiClient);
        if (ultimaUbicacion != null) {
            latitudTextView.setText(String.valueOf(ultimaUbicacion.getLatitude()));
            longitudTextView.setText(String.valueOf(ultimaUbicacion.getLongitude()));
        }
    }

    @Override
    public void onConnectionSuspended(int i) {

    }

    @Override
    public void onConnectionFailed(ConnectionResult connectionResult) {

    }

    @Override
    protected void onStart() {
        super.onStart();
        googleApiClient.connect();
    }

    @Override
    protected void onStop() {
        super.onStop();
        if (googleApiClient.isConnected()) {
            googleApiClient.disconnect();
        }
    }
}

strings.xml

<resources>
    <string name="app_name">Mi punto en el mundo</string>
    <string name="latitud">Latitud</string>
    <string name="longitud">Longitud</string>
</resources>