Display Current Location in Android


Create new project in Android Studio with steps as below:




Open res\values\strings.xml file and add new string as below:

<resources>
    <string name="app_name">Learn Android with Real Apps</string>
    <string name="show_my_location">Show My Location</string>
    <string name="latitude">Latitude</string>
    <string name="longitude">Longitude</string>
</resources>

Open AndroidManifest.xml file in manifest folder and add permissions as below:

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="android.demo.learnandroidwithrealapps">

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

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

</manifest>

Open res\layout\activity_main.xml file and create layout as below:

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout 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"
    android:orientation="vertical"
    tools:context=".MainActivity">

    <Button
        android:id="@+id/buttonShowLocation"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="@string/show_my_location" />

    <TextView
        android:id="@+id/textView2"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_marginLeft="5dp"
        android:text="@string/latitude"
        android:textStyle="bold" />

    <TextView
        android:id="@+id/textViewLatitude"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_marginLeft="5dp" />

    <TextView
        android:id="@+id/textView"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_marginLeft="5dp"
        android:text="@string/longitude"
        android:textStyle="bold" />

    <TextView
        android:id="@+id/textViewLongitude"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_marginLeft="5dp" />

</LinearLayout>




Add code to MainActivity.java file in android.demo.learnandroidwithrealapps package as below:

package android.demo.learnandroidwithrealapps;

import android.Manifest;
import android.content.pm.PackageManager;
import android.location.Location;
import android.location.LocationListener;
import android.location.LocationManager;
import android.os.Bundle;
import android.support.annotation.NonNull;
import android.support.v4.app.ActivityCompat;
import android.support.v4.content.ContextCompat;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;
import android.widget.Toast;

public class MainActivity extends AppCompatActivity {

    private Button buttonLocation;
    private TextView textViewLatitude, textViewLongitude;

    /* GPS Constant Permission */
    private static final int MY_PERMISSION_ACCESS_COARSE_LOCATION = 11;
    private static final int MY_PERMISSION_ACCESS_FINE_LOCATION = 12;

    /* Position */
    private static final long MINIMUM_TIME = 2 * 10000;  // 10s
    private static final float MINIMUM_DISTANCE = 1; // 50m

    /* GPS */
    private LocationManager locationManager;

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

    private void initView() {
        buttonLocation = findViewById(R.id.buttonShowLocation);
        buttonLocation.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                buttonLocation_onClick(view);
            }
        });
        textViewLatitude = findViewById(R.id.textViewLatitude);
        textViewLongitude = findViewById(R.id.textViewLongitude);
    }

    private void buttonLocation_onClick(View view) {
        if (ContextCompat.checkSelfPermission(this, android.Manifest.permission.ACCESS_FINE_LOCATION) == PackageManager.PERMISSION_GRANTED
                || ContextCompat.checkSelfPermission(this, android.Manifest.permission.ACCESS_COARSE_LOCATION) == PackageManager.PERMISSION_GRANTED) {
            locationManager = (LocationManager) getSystemService(LOCATION_SERVICE);
            locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, MINIMUM_TIME, MINIMUM_DISTANCE, locationListener);
        } else {
            if (ContextCompat.checkSelfPermission(this, Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
                ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.ACCESS_COARSE_LOCATION}, MY_PERMISSION_ACCESS_COARSE_LOCATION);
            }
            if (ContextCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
                ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.ACCESS_FINE_LOCATION}, MY_PERMISSION_ACCESS_FINE_LOCATION);
            }
        }
    }

    @Override
    public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
        switch (requestCode) {
            case MY_PERMISSION_ACCESS_COARSE_LOCATION:
                if (grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
                    Toast.makeText(getApplicationContext(), "ACCESS_COARSE_LOCATION permission was granted", Toast.LENGTH_LONG).show();
                } else {
                    Toast.makeText(getApplicationContext(), "ACCESS_COARSE_LOCATION denied", Toast.LENGTH_LONG).show();
                }
                break;
            case MY_PERMISSION_ACCESS_FINE_LOCATION:
                if (grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
                    Toast.makeText(getApplicationContext(), "ACCESS_FINE_LOCATION permission was granted", Toast.LENGTH_LONG).show();
                } else {
                    Toast.makeText(getApplicationContext(), "ACCESS_FINE_LOCATION denied", Toast.LENGTH_LONG).show();
                }
                break;
        }
    }

    private final LocationListener locationListener = new LocationListener() {

        @Override
        public void onLocationChanged(final Location location) {
            if (location != null) {
                textViewLatitude.setText(String.valueOf(location.getLatitude()));
                textViewLongitude.setText(String.valueOf(location.getLongitude()));
            } else {
                Toast.makeText(getApplicationContext(), "location is null", Toast.LENGTH_LONG).show();
            }
        }

        @Override
        public void onStatusChanged(String s, int i, Bundle bundle) {

        }

        @Override
        public void onProviderEnabled(String s) {
            Toast.makeText(MainActivity.this, "Provider enabled: " + s, Toast.LENGTH_SHORT).show();
        }

        @Override
        public void onProviderDisabled(String s) {
            Toast.makeText(MainActivity.this, "Provider disabled: " + s, Toast.LENGTH_SHORT).show();
        }
    };

}