[Android] FusedLocationProvider とGoogle Mapで地図を表示

FusedLocationProviderClientで位置情報の取得し、それをGoogle Mapで地図表示をすることがと可能です。

Android Studio
2021.2.1

FusedLocationProviderClient

GPSだけでなく、WiFiや電話網を使った位置情報はFusedLocationProviderClientで取得できます
　

cat57 00 100x100 - [Android] FusedLocationProvider とGoogle Mapで地図を表示

[Android] FusedLocationProviderClient を使って位置情報を取得

位置情報といえばGPSと思う人が多いとは思いますが、スマホでの位置情報はGPS以外にWiFiや電話網を駆使して短時間で効率の良い情報を取得で...

　
また、Google MapはAPI キーを取得して地図表示することは自由度はありますが、使用量による費用が発生することもあります。Intentを使ってGoogle Mapアプリを起動させてしまうのが簡単です
　

x13.4 gmap 00e 100x100 - [Android] FusedLocationProvider とGoogle Mapで地図を表示

[Android] Intentでの簡単なGoogle Map 地図の表示

API key 無しでIntentを使って簡単に Google Map を呼び出して地図を表示させる方法です。　 GoogleMapを...

　
作成手順としては以下を合体させます

FusedLocationProviderClientの更新リエストを作成
IntentでGoogle Mapに飛ばして地図表示

MapsActivity.java

//package your.package.name;

import androidx.activity.result.ActivityResultLauncher;
import androidx.activity.result.contract.ActivityResultContracts;
import androidx.annotation.NonNull;
import androidx.appcompat.app.AppCompatActivity;
import androidx.core.app.ActivityCompat;
import android.Manifest;
import android.annotation.SuppressLint;
import android.content.Intent;
import android.content.pm.PackageManager;
import android.location.Location;
import android.net.Uri;
import android.os.Bundle;
import android.os.Looper;
import android.widget.TextView;
import android.widget.Toast;
import com.google.android.gms.location.FusedLocationProviderClient;
import com.google.android.gms.location.LocationCallback;
import com.google.android.gms.location.LocationRequest;
import com.google.android.gms.location.LocationResult;
import com.google.android.gms.location.LocationServices;

public class MainActivity extends AppCompatActivity {

    private LocationCallback locationCallback;
    private LocationRequest locationRequest;
    private FusedLocationProviderClient fusedLocationClient;
    private boolean requestingLocationUpdates = false;

    private TextView textView1, textView2;

    private final ActivityResultLauncher<String>
            requestPermissionLauncher = registerForActivityResult(
            new ActivityResultContracts.RequestPermission(),
            isGranted -> {
                if (isGranted) {
                    requestingLocationUpdates = true;
                } else {
                    Toast toast = Toast.makeText(this,
                            "これ以上なにもできません", Toast.LENGTH_SHORT);
                    toast.show();
                }
            });

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

        if (ActivityCompat.checkSelfPermission(this,
                Manifest.permission.ACCESS_FINE_LOCATION)
                != PackageManager.PERMISSION_GRANTED) {

            requestPermissionLauncher.launch(
                    Manifest.permission.ACCESS_FINE_LOCATION);

        } else {
            requestingLocationUpdates = true;
        }

        textView1 = findViewById(R.id.text_view1);
        textView2 = findViewById(R.id.text_view2);

        locationRequest = LocationRequest.create();

        locationRequest.setPriority(
                  Priority.PRIORITY_HIGH_ACCURACY)
                .setFastestInterval(5000)
                .setInterval(10000);

        locationCallback = new LocationCallback() {
            @Override
            public void onLocationResult(@NonNull LocationResult locationResult) {
                for (Location location : locationResult.getLocations()) {
                    // 緯度の表示
                    String str1 = " Latitude:" + location.getLatitude();
                    textView1.setText(str1);

                    // 経度の表示
                    String str2 = " Longitude:" + location.getLongitude();
                    textView2.setText(str2);

                    // Google Map
                    moveToGMap(location);
                }
            }
        };

        fusedLocationClient =
                LocationServices.getFusedLocationProviderClient(this);
    }

    private void startLocationUpdates() {
        if (ActivityCompat.checkSelfPermission(
                this, Manifest.permission.ACCESS_FINE_LOCATION)
                != PackageManager.PERMISSION_GRANTED) {
            return;
        }

        fusedLocationClient.requestLocationUpdates(locationRequest,
                locationCallback,
                Looper.getMainLooper());
    }

    @SuppressLint("QueryPermissionsNeeded")
    private void moveToGMap(Location location){
        String str1 = String.valueOf(location.getLatitude());
        String str2 = String.valueOf(location.getLongitude());

        // geo:[lat,lng][?param[&param]...], param:z=zoom
        Uri uri = Uri.parse("geo:"+str1+","+str2+"?z=10");

        Intent intent = new Intent(Intent.ACTION_VIEW, uri);
        startActivity(intent);
        if (intent.resolveActivity(getPackageManager()) != null) {
            startActivity(intent);
        }
    }

    private void stopLocationUpdates() {
        fusedLocationClient.removeLocationUpdates(locationCallback);
    }

    @Override
    protected void onResume() {
        super.onResume();
        if (requestingLocationUpdates) {
            startLocationUpdates();
        }
    }

    @Override
    protected void onPause() {
        super.onPause();
        stopLocationUpdates();
    }
}

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//package your.package.name;

import androidx.activity.result.ActivityResultLauncher;

import androidx.activity.result.contract.ActivityResultContracts;

import androidx.annotation.NonNull;

import androidx.appcompat.app.AppCompatActivity;

import androidx.core.app.ActivityCompat;

import android.Manifest;

import android.annotation.SuppressLint;

import android.content.Intent;

import android.content.pm.PackageManager;

import android.location.Location;

import android.net.Uri;

import android.os.Bundle;

import android.os.Looper;

import android.widget.TextView;

import android.widget.Toast;

import com.google.android.gms.location.FusedLocationProviderClient;

import com.google.android.gms.location.LocationCallback;

import com.google.android.gms.location.LocationRequest;

import com.google.android.gms.location.LocationResult;

import com.google.android.gms.location.LocationServices;

public class MainActivity extends AppCompatActivity {

private LocationCallback locationCallback;

private LocationRequest locationRequest;

private FusedLocationProviderClient fusedLocationClient;

private boolean requestingLocationUpdates = false;

private TextView textView1, textView2;

private final ActivityResultLauncher<String>

requestPermissionLauncher = registerForActivityResult(

new ActivityResultContracts.RequestPermission(),

isGranted -> {

if (isGranted) {

requestingLocationUpdates = true;

} else {

Toast toast = Toast.makeText(this,

"これ以上なにもできません", Toast.LENGTH_SHORT);

toast.show();

}

});

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

if (ActivityCompat.checkSelfPermission(this,

Manifest.permission.ACCESS_FINE_LOCATION)

!= PackageManager.PERMISSION_GRANTED) {

requestPermissionLauncher.launch(

Manifest.permission.ACCESS_FINE_LOCATION);

} else {

requestingLocationUpdates = true;

}

textView1 = findViewById(R.id.text_view1);

textView2 = findViewById(R.id.text_view2);

locationRequest = LocationRequest.create();

locationRequest.setPriority(

Priority.PRIORITY_HIGH_ACCURACY)

.setFastestInterval(5000)

.setInterval(10000);

locationCallback = new LocationCallback() {

@Override

public void onLocationResult(@NonNull LocationResult locationResult) {

for (Location location : locationResult.getLocations()) {

// 緯度の表示

String str1 = " Latitude:" + location.getLatitude();

textView1.setText(str1);

// 経度の表示

String str2 = " Longitude:" + location.getLongitude();

textView2.setText(str2);

// Google Map

moveToGMap(location);

}

};

fusedLocationClient =

LocationServices.getFusedLocationProviderClient(this);

}

private void startLocationUpdates() {

if (ActivityCompat.checkSelfPermission(

this, Manifest.permission.ACCESS_FINE_LOCATION)

!= PackageManager.PERMISSION_GRANTED) {

return;

}

fusedLocationClient.requestLocationUpdates(locationRequest,

locationCallback,

Looper.getMainLooper());

}

@SuppressLint("QueryPermissionsNeeded")

private void moveToGMap(Location location){

String str1 = String.valueOf(location.getLatitude());

String str2 = String.valueOf(location.getLongitude());

// geo:[lat,lng][?param[&param]...], param:z=zoom

Uri uri = Uri.parse("geo:"+str1+","+str2+"?z=10");

Intent intent = new Intent(Intent.ACTION_VIEW, uri);

startActivity(intent);

if (intent.resolveActivity(getPackageManager()) != null) {

startActivity(intent);

}

private void stopLocationUpdates() {

fusedLocationClient.removeLocationUpdates(locationCallback);

}

@Override

protected void onResume() {

super.onResume();

if (requestingLocationUpdates) {

startLocationUpdates();

}

@Override

protected void onPause() {

super.onPause();

stopLocationUpdates();

}

activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MainActivity">

    <TextView
        android:id="@+id/text_view1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_margin="20dp"
        android:textColor="#44f"
        android:textSize="20sp"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintHorizontal_bias="0.501"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintRight_toRightOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintVertical_bias="0.2" />

    <TextView
        android:id="@+id/text_view2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:textSize="20sp"
        android:textColor="#f44"
        android:layout_margin="20dp"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintHorizontal_bias="0.5"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintRight_toRightOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintVertical_bias="0.3" />

</androidx.constraintlayout.widget.ConstraintLayout>

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

<androidx.constraintlayout.widget.ConstraintLayout

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

xmlns:app="http://schemas.android.com/apk/res-auto"

xmlns:tools="http://schemas.android.com/tools"

android:layout_width="match_parent"

android:layout_height="match_parent"

tools:context=".MainActivity">

<TextView

android:id="@+id/text_view1"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:layout_margin="20dp"

android:textColor="#44f"

android:textSize="20sp"

app:layout_constraintBottom_toBottomOf="parent"

app:layout_constraintHorizontal_bias="0.501"

app:layout_constraintLeft_toLeftOf="parent"

app:layout_constraintRight_toRightOf="parent"

app:layout_constraintTop_toTopOf="parent"

app:layout_constraintVertical_bias="0.2" />

<TextView

android:id="@+id/text_view2"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:textSize="20sp"

android:textColor="#f44"

android:layout_margin="20dp"

app:layout_constraintBottom_toBottomOf="parent"

app:layout_constraintHorizontal_bias="0.5"

app:layout_constraintLeft_toLeftOf="parent"

app:layout_constraintRight_toRightOf="parent"

app:layout_constraintTop_toTopOf="parent"

app:layout_constraintVertical_bias="0.3" />

</androidx.constraintlayout.widget.ConstraintLayout>

play-services-locationのライブラリ追加
build.gradle(Module…)

plugins {
    ...
}

android {
    ...
}

dependencies {
    implementation 'com.google.android.gms:play-services-location:20.0.0'
    ...
}

plugins {

...

}

android {

...

}

dependencies {

implementation 'com.google.android.gms:play-services-location:20.0.0'

...

}

位置情報のパーミッション
AndroidManifest.xml

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    ... >
    <uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
    <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"/>

    <application
        ...
    </application>

</manifest>

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

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

... >

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

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

<application

...

</application>

</manifest>

emulatorのLocationをハワイにセットして実行してみました

References:
直近の位置情報を取得する – Android Developers
現在地の更新情報をリクエストする – Android デベロッパー
 位置情報の設定を変更する – Android デベロッパー
 FusedLocationProviderClient
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