This video shows the steps to implement request location updates APIs for enforcing the App and Android device to get the updated location information.
This is particularly useful when the App is trying to access the last location from the getFusedLocationProviderClient library.
If the getLastLocation API is returning NULL then it indicates that the respective location value is not fetched by the device and a manual request (in the code) is required for the system (OS) to fetch the location values.
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Complete source code and other details:
package com.programmerworld.requestupdatesforlastlocation;
import static android.Manifest.permission.ACCESS_COARSE_LOCATION;
import static android.Manifest.permission.ACCESS_FINE_LOCATION;
import static com.google.android.gms.location.Priority.PRIORITY_HIGH_ACCURACY;
import androidx.annotation.NonNull;
import androidx.appcompat.app.AppCompatActivity;
import androidx.core.app.ActivityCompat;
import android.content.pm.PackageManager;
import android.location.Location;
import android.os.Bundle;
import android.view.View;
import android.widget.TextView;
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;
import com.google.android.gms.tasks.OnSuccessListener;
public class MainActivity extends AppCompatActivity {
private TextView textView;
private String stringLatitude = "0.0";
private String stringLongitude = "0.0";
private int intIndex = 1;
private FusedLocationProviderClient fusedLocationProviderClient;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
ActivityCompat.requestPermissions(this,
new String[]{ACCESS_COARSE_LOCATION,
ACCESS_FINE_LOCATION},
PackageManager.PERMISSION_GRANTED);
textView = findViewById(R.id.textView);
LocationRequest locationRequest = new LocationRequest.Builder(PRIORITY_HIGH_ACCURACY, 100)
.setWaitForAccurateLocation(false)
.setMinUpdateIntervalMillis(2000)
.setMaxUpdateDelayMillis(100)
.build();
LocationCallback locationCallback = new LocationCallback() {
@Override
public void onLocationResult(@NonNull LocationResult locationResult) {
if (locationResult == null) {
return;
}
}
};
if (ActivityCompat.checkSelfPermission(this, android.Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(this, android.Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
// TODO: Consider calling
// ActivityCompat#requestPermissions
// here to request the missing permissions, and then overriding
// public void onRequestPermissionsResult(int requestCode, String[] permissions,
// int[] grantResults)
// to handle the case where the user grants the permission. See the documentation
// for ActivityCompat#requestPermissions for more details.
return;
}
LocationServices.getFusedLocationProviderClient(getApplicationContext())
.requestLocationUpdates(locationRequest, locationCallback, null);
}
public void buttonGetLocation(View view) {
fusedLocationProviderClient = LocationServices.getFusedLocationProviderClient(this);
if (ActivityCompat.checkSelfPermission(this, android.Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(this, android.Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
// TODO: Consider calling
// ActivityCompat#requestPermissions
// here to request the missing permissions, and then overriding
// public void onRequestPermissionsResult(int requestCode, String[] permissions,
// int[] grantResults)
// to handle the case where the user grants the permission. See the documentation
// for ActivityCompat#requestPermissions for more details.
return;
}
fusedLocationProviderClient.getLastLocation().addOnSuccessListener(this, new OnSuccessListener<Location>() {
@Override
public void onSuccess(Location location) {
if (location != null) {
stringLatitude = Double.toString(location.getLatitude());
stringLongitude = Double.toString(location.getLongitude());
} else {
stringLatitude = "null";
stringLongitude = "null";
}
}
});
textView.setText("Index: " + intIndex +
"\nLatitude: " + stringLatitude +
"\nLongitude: " + stringLongitude);
intIndex++;
}
}plugins {
id 'com.android.application'
}
android {
namespace 'com.programmerworld.requestupdatesforlastlocation'
compileSdk 33
defaultConfig {
applicationId "com.programmerworld.requestupdatesforlastlocation"
minSdk 33
targetSdk 33
versionCode 1
versionName "1.0"
testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
}
buildTypes {
release {
minifyEnabled false
proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
}
}
compileOptions {
sourceCompatibility JavaVersion.VERSION_1_8
targetCompatibility JavaVersion.VERSION_1_8
}
}
dependencies {
implementation 'androidx.appcompat:appcompat:1.6.1'
implementation 'com.google.android.material:material:1.8.0'
implementation 'androidx.constraintlayout:constraintlayout:2.1.4'
testImplementation 'junit:junit:4.13.2'
androidTestImplementation 'androidx.test.ext:junit:1.1.5'
androidTestImplementation 'androidx.test.espresso:espresso-core:3.5.1'
implementation 'com.google.android.gms:play-services-location:21.0.1'
}<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools">
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION"/>
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"/>
<application
android:allowBackup="true"
android:dataExtractionRules="@xml/data_extraction_rules"
android:fullBackupContent="@xml/backup_rules"
android:icon="@mipmap/ic_launcher"
android:label="@string/app_name"
android:supportsRtl="true"
android:theme="@style/Theme.RequestUpdatesForLastLocation"
tools:targetApi="31">
<activity
android:name=".MainActivity"
android:exported="true">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
</manifest><?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/textView"
android:layout_width="382dp"
android:layout_height="299dp"
android:onClick="buttonGetLocation"
android:text="Hello World!"
android:textAlignment="center"
android:textSize="34sp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
</androidx.constraintlayout.widget.ConstraintLayout>1st run, the location listener is yet to be called:
Issue: Location information not being updated, hence, it is returning null as shown in the below:
Issue remains even after multiple trials:
After adding the requestLocationUpdates call, the issue is resolved. Able to fetch the location information in the App:
