Here, my activity class name is MapsActivity and my custom nonactivity class name is GeoFenceBroadCastReceiver. I have a SwitchCompact switch in the actitvity_maps.xml file and I can access it from MapsActivity.java by findViewById But when I want to access it from GeoFenceBroadCastReceiver I got an error on my application. Now my questions are Can I use findViewById to access my SwitchCompact switch from GeoFenceBroadCastReceiver and how?
SwitchCompact switch code--
<androidx.appcompat.widget.SwitchCompat
android:id="@+id/vibrationSwitchId"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentRight="true"
android:layout_centerVertical="true"
android:layout_gravity="right"
android:layout_marginRight="20dp"
android:fontFamily="@font/lato_bold"
android:scaleX="1.6"
android:scaleY="1.6"
android:textAllCaps="true"
android:textOff="@string/text_off"
android:textOn="@string/text_on"
android:thumb="@drawable/thumb"
app:showText="true"
app:switchTextAppearance="@style/switch_style"
app:thumbTint="#FFC107"
app:track="@drawable/track"
app:trackTint="#E6D7D7" />
</RelativeLayout>
Switch Output
MapsActivity Code
package com.example.akash.mapsdemo;
import androidx.annotation.NonNull;
import androidx.annotation.Nullable;
import androidx.annotation.RequiresApi;
import androidx.appcompat.widget.SwitchCompat;
import androidx.core.app.ActivityCompat;
import androidx.core.content.ContextCompat;
import androidx.fragment.app.FragmentActivity;
import android.Manifest;
import android.app.Activity;
import android.app.NotificationManager;
import android.app.PendingIntent;
import android.content.Context;
import android.content.Intent;
import android.content.pm.PackageManager;
import android.graphics.Color;
import android.location.Location;
import android.media.AudioManager;
import android.os.Build;
import android.os.Bundle;
import android.provider.Settings;
import android.util.Log;
import android.view.View;
import android.widget.FrameLayout;
import android.widget.LinearLayout;
import android.widget.Toast;
import com.google.android.gms.common.ConnectionResult;
import com.google.android.gms.location.Geofence;
import com.google.android.gms.location.GeofencingClient;
import com.google.android.gms.location.GeofencingRequest;
import com.google.android.gms.location.LocationListener;
import com.google.android.gms.location.LocationRequest;
import com.google.android.gms.location.LocationServices;
import com.google.android.gms.common.api.GoogleApiClient;
import com.google.android.gms.maps.CameraUpdateFactory;
import com.google.android.gms.maps.GoogleMap;
import com.google.android.gms.maps.OnMapReadyCallback;
import com.google.android.gms.maps.SupportMapFragment;
import com.google.android.gms.maps.model.BitmapDescriptorFactory;
import com.google.android.gms.maps.model.CircleOptions;
import com.google.android.gms.maps.model.LatLng;
import com.google.android.gms.maps.model.Marker;
import com.google.android.gms.maps.model.MarkerOptions;
import com.google.android.gms.tasks.OnFailureListener;
import com.google.android.gms.tasks.OnSuccessListener;
public class MapsActivity extends FragmentActivity implements OnMapReadyCallback,
GoogleApiClient.ConnectionCallbacks,
GoogleApiClient.OnConnectionFailedListener,
LocationListener, GoogleMap.OnMapLongClickListener{
private static final String TAG = "MapsActivity";
private GeoFenceHelper geoFenceHelper;
private GeofencingClient geofencingClient;
private static final int BACKGROUND_LOCATION_ACCESS_REQUEST_CODE = 1002;
private GoogleMap mMap;
private GoogleApiClient client;
private LocationRequest locationRequest;
private Location lastLocation;
private Marker currentLocationMarker;
public static final int REQUEST_LOCATION_CODE = 99;
int PROXIMITY_RADIUS = 10000;
double latitude,longitude;
private int FINE_LOCATION_ACCESS_REQUEST_CODE = 10001;
private float GEOFENCE_RADIUS = 100;
private String GEOFENCE_ID = "SOME_GEOFENCE_ID";
void SwitchToast(SwitchCompat btnID, String textON, String textOFF, String modeName){
btnID.setOnCheckedChangeListener((buttonView, isChecked) -> {
AudioManager audioManager = (AudioManager) getSystemService(Context.AUDIO_SERVICE);
// AlarmManager alarmManager = (AlarmManager) getSystemService(Context.ALARM_SERVICE);
if (isChecked){
if(modeName.equals("isVibration") ){
audioManager.setRingerMode(AudioManager.RINGER_MODE_VIBRATE);
Toast.makeText(MapsActivity.this, textON, Toast.LENGTH_SHORT).show();
}
if (modeName.equals("isAlarm")){
audioManager.setRingerMode(AudioManager.STREAM_ALARM);
Toast.makeText(MapsActivity.this, textON, Toast.LENGTH_SHORT).show();
}
}
else{
if(modeName.equals("isVibration") ){
audioManager.setRingerMode(AudioManager.RINGER_MODE_NORMAL);
Toast.makeText(MapsActivity.this, textOFF, Toast.LENGTH_SHORT).show();
}
if (modeName.equals("isAlarm")){
audioManager.setRingerMode(AudioManager.STREAM_ALARM);
Toast.makeText(MapsActivity.this, textOFF, Toast.LENGTH_SHORT).show();
}
}
});
}
@RequiresApi(api = Build.VERSION_CODES.M)
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_maps);
geofencingClient = LocationServices.getGeofencingClient(this);
geoFenceHelper = new GeoFenceHelper(this);
SwitchCompat vibrationSwitchID = findViewById(R.id.vibrationSwitchId);
SwitchCompat alarmSwitchID = findViewById(R.id.alarmSwitchId);
SwitchToast(vibrationSwitchID, "Vibration ON", "Vibration OFF", "isVibration");
SwitchToast(alarmSwitchID, "Alarm ON", "Alarm OFF", "isAlarm");
NotificationManager systemService = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
if((Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) && !systemService.isNotificationPolicyAccessGranted()){
startActivity(new Intent(Settings.ACTION_NOTIFICATION_POLICY_ACCESS_SETTINGS));
}
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M)
{
checkLocationPermission();
}
// Obtain the SupportMapFragment and get notified when the map is ready to be used.
SupportMapFragment mapFragment = (SupportMapFragment) getSupportFragmentManager()
.findFragmentById(R.id.map);
mapFragment.getMapAsync(this);
}
@Override
public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
super.onRequestPermissionsResult(requestCode, permissions, grantResults);
if (requestCode == FINE_LOCATION_ACCESS_REQUEST_CODE) {
if (grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
//Now we have the permission
if (ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
return;
}
mMap.setMyLocationEnabled(true);
} else {
Toast.makeText(this, "We need location permission to run this app", Toast.LENGTH_LONG).show();
}
}
if (requestCode == BACKGROUND_LOCATION_ACCESS_REQUEST_CODE) {
if (grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
//Now we have the permission
if (ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
return;
}
Toast.makeText(this, "You can add geofences..", Toast.LENGTH_LONG).show();
} else {
Toast.makeText(this, "Background location access is necessary for run this application", Toast.LENGTH_LONG).show();
}
}
}
/**
* Manipulates the map once available.
* This callback is triggered when the map is ready to be used.
* This is where we can add markers or lines, add listeners or move the camera. In this case,
* we just add a marker near Sydney, Australia.
* If Google Play services is not installed on the device, the user will be prompted to install
* it inside the SupportMapFragment. This method will only be triggered once the user has
* installed Google Play services and returned to the app.
*/
@Override
public void onMapReady(GoogleMap googleMap) {
mMap = googleMap;
if (ContextCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) == PackageManager.PERMISSION_GRANTED) {
buildGoogleApiClient();
mMap.setMyLocationEnabled(true);
}
LatLng DIU = new LatLng(-34, 151);
mMap.moveCamera(CameraUpdateFactory.newLatLngZoom(DIU, 16));
enableUserLocation();
mMap.setOnMapLongClickListener(this);
}
public void enableUserLocation() {
if (ContextCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) == PackageManager.PERMISSION_GRANTED) {
mMap.setMyLocationEnabled(true);
} else {
//ask for permission
ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.ACCESS_FINE_LOCATION}, FINE_LOCATION_ACCESS_REQUEST_CODE);
}
}
@Override
public void onMapLongClick(@NonNull LatLng latLng) {
if (Build.VERSION.SDK_INT >= 29){
//We need the background permission
if (ContextCompat.checkSelfPermission(this, Manifest.permission.ACCESS_BACKGROUND_LOCATION) == PackageManager.PERMISSION_GRANTED){
tryAddingGeofence(latLng);
}else{
ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.ACCESS_BACKGROUND_LOCATION}, BACKGROUND_LOCATION_ACCESS_REQUEST_CODE);
}
}else{
tryAddingGeofence(latLng);
}
}
private void tryAddingGeofence(LatLng latLng){
mMap.clear();
addMarker(latLng);
addCircle(latLng, GEOFENCE_RADIUS);
addGeofence(latLng, GEOFENCE_RADIUS);
}
private void addGeofence(LatLng latLng, float radius) {
Geofence geofence = geoFenceHelper.getGeoFence(GEOFENCE_ID, latLng, radius, Geofence.GEOFENCE_TRANSITION_ENTER | Geofence.GEOFENCE_TRANSITION_DWELL | Geofence.GEOFENCE_TRANSITION_EXIT);
GeofencingRequest geofencingRequest = geoFenceHelper.getGeoFencingRequest(geofence);
PendingIntent pendingIntent = geoFenceHelper.getPendingIntent();
if (ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
return;
}
geofencingClient.addGeofences(geofencingRequest, pendingIntent)
.addOnSuccessListener(new OnSuccessListener<Void>() {
@Override
public void onSuccess(Void unused) {
Log.d(TAG, "onSuccess: GeoFence Added....");
}
})
.addOnFailureListener(new OnFailureListener() {
@Override
public void onFailure(@NonNull Exception e) {
String errorMessage = geoFenceHelper.getErrorString(e);
Log.d(TAG, "onFailure: "+ errorMessage);
}
});
}
private void addMarker(LatLng latLng){
MarkerOptions markerOptions = new MarkerOptions().position(latLng);
mMap.addMarker(markerOptions);
}
private void addCircle(LatLng latLng, float radius){
CircleOptions circleOptions = new CircleOptions();
circleOptions.center(latLng);
circleOptions.radius(radius);
circleOptions.strokeColor(Color.argb(255, 255, 0, 0));
circleOptions.fillColor(Color.argb(64, 255, 0, 0));
circleOptions.strokeWidth(4);
mMap.addCircle(circleOptions);
}
protected synchronized void buildGoogleApiClient() {
client = new GoogleApiClient.Builder(this).addConnectionCallbacks(this).addOnConnectionFailedListener(this).addApi(LocationServices.API).build();
client.connect();
}
@Override
public void onLocationChanged(Location location) {
latitude = location.getLatitude();
longitude = location.getLongitude();
lastLocation = location;
if(currentLocationMarker != null)
{
currentLocationMarker.remove();
}
Log.d("lat = ",""+latitude);
LatLng latLng = new LatLng(location.getLatitude() , location.getLongitude());
MarkerOptions markerOptions = new MarkerOptions();
markerOptions.position(latLng);
markerOptions.title("Current Location");
markerOptions.icon(BitmapDescriptorFactory.defaultMarker(BitmapDescriptorFactory.HUE_BLUE));
currentLocationMarker = mMap.addMarker(markerOptions);
mMap.moveCamera(CameraUpdateFactory.newLatLng(latLng));
mMap.animateCamera(CameraUpdateFactory.zoomBy(10));
if(client != null)
{
LocationServices.FusedLocationApi.removeLocationUpdates(client,this);
}
}
public void onClick(View v)
{
Object dataTransfer[] = new Object[2];
GetNearbyPlacesData getNearbyPlacesData = new GetNearbyPlacesData();
LinearLayout settingViewId = findViewById(R.id.settingViewID);
FrameLayout locationViewId = findViewById(R.id.locationViewID);
FrameLayout mosqueViewId = findViewById(R.id.mosqueViewID);
LinearLayout prayerTimeViewId = findViewById(R.id.prayerTimeViewID);
switch(v.getId())
{
case R.id.settingsID:
locationViewId.setVisibility(v.GONE);
mosqueViewId.setVisibility(v.GONE);
prayerTimeViewId.setVisibility(v.GONE);
settingViewId.setVisibility(v.VISIBLE);
Toast.makeText(MapsActivity.this, "Showing Nearby Hospitals", Toast.LENGTH_SHORT).show();
break;
case R.id.locationID:
locationViewId.setVisibility(v.VISIBLE);
mosqueViewId.setVisibility(v.GONE);
prayerTimeViewId.setVisibility(v.GONE);
settingViewId.setVisibility(v.GONE);
Toast.makeText(MapsActivity.this, "Showing Nearby Schools", Toast.LENGTH_SHORT).show();
break;
case R.id.mosqueID:
locationViewId.setVisibility(v.GONE);
mosqueViewId.setVisibility(v.VISIBLE);
prayerTimeViewId.setVisibility(v.GONE);
settingViewId.setVisibility(v.GONE);
mMap.clear();
String mosque = "mosque";
String url = getUrl(latitude, longitude, mosque);
dataTransfer[0] = mMap;
dataTransfer[1] = url;
getNearbyPlacesData.execute(dataTransfer);
Toast.makeText(MapsActivity.this, "Showing Nearby Mosque", Toast.LENGTH_SHORT).show();
break;
case R.id.prayerTimeID:
locationViewId.setVisibility(v.GONE);
mosqueViewId.setVisibility(v.GONE);
prayerTimeViewId.setVisibility(v.VISIBLE);
settingViewId.setVisibility(v.GONE);
Toast.makeText(MapsActivity.this, "Showing Nearby Restaurants", Toast.LENGTH_SHORT).show();
break;
}
}
private String getUrl(double latitude , double longitude , String nearbyPlace)
{
StringBuilder googlePlaceUrl = new StringBuilder("https://maps.googleapis.com/maps/api/place/nearbysearch/json?");
googlePlaceUrl.append("location="+latitude+","+longitude);
googlePlaceUrl.append("&radius="+PROXIMITY_RADIUS);
googlePlaceUrl.append("&type="+nearbyPlace);
googlePlaceUrl.append("&sensor=true");
googlePlaceUrl.append("&key="+getString(R.string.google_maps_key));
Log.d("MapsActivity", "url = "+googlePlaceUrl.toString());
return googlePlaceUrl.toString();
}
@Override
public void onConnected(@Nullable Bundle bundle) {
locationRequest = new LocationRequest();
locationRequest.setInterval(100);
locationRequest.setFastestInterval(1000);
locationRequest.setPriority(LocationRequest.PRIORITY_BALANCED_POWER_ACCURACY);
if(ContextCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION ) == PackageManager.PERMISSION_GRANTED)
{
LocationServices.FusedLocationApi.requestLocationUpdates(client, locationRequest, this);
}
}
public boolean checkLocationPermission()
{
if(ContextCompat.checkSelfPermission(this,Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED )
{
ActivityCompat.requestPermissions(this,new String[] {Manifest.permission.ACCESS_FINE_LOCATION },REQUEST_LOCATION_CODE);
return false;
}
else
return true;
}
@Override
public void onConnectionSuspended(int i) {
}
@Override
public void onConnectionFailed(@NonNull ConnectionResult connectionResult) {
}
}
GeoFenceBroadCastReceiver code
package com.example.akash.mapsdemo;
import android.app.Activity;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.util.Log;
import android.widget.Toast;
import androidx.appcompat.widget.SwitchCompat;
import com.google.android.gms.location.Geofence;
import com.google.android.gms.location.GeofencingEvent;
import java.util.List;
public class GeoFenceBroadCastReceiver extends BroadcastReceiver {
private static final String TAG = "GeoFenceBroadCastReceiv";
// public Activity mapsActivity;
// public GeoFenceBroadCastReceiver(MapsActivity _mapsActivity) {
// this.mapsActivity = _mapsActivity;
// SwitchCompat btnID = this.mapsActivity.findViewById ( R.id.vibrationSwitchId );
// }
@Override
public void onReceive(Context context, Intent intent) {
// Toast.makeText(context, "Geofence Trigger", Toast.LENGTH_LONG).show();
NotificationHelper notificationHelper = new NotificationHelper(context);
GeofencingEvent geofencingEvent = GeofencingEvent.fromIntent(intent);
if(geofencingEvent.hasError()){
Log.d(TAG, "onReceiver: Error receiving geofence event");
return;
}
List<Geofence> geofenceList = geofencingEvent.getTriggeringGeofences();
//
for (Geofence geofence: geofenceList){
Log.d(TAG, "onReceive: "+ geofence.getRequestId());
}
// Location location = geofencingEvent.getTriggeringLocation();
int transitionType = geofencingEvent.getGeofenceTransition();
switch (transitionType){
case Geofence.GEOFENCE_TRANSITION_ENTER:
Toast.makeText(context, "GEOFENCE_TRANSITION_ENTER", Toast.LENGTH_SHORT).show();
notificationHelper.sendHighPriorityNotification("GEOFENCE_TRANSITION_ENTER", "", MapsActivity.class);
break;
case Geofence.GEOFENCE_TRANSITION_DWELL:
Toast.makeText(context, "GEOFENCE_TRANSITION_DWELL", Toast.LENGTH_SHORT).show();
notificationHelper.sendHighPriorityNotification("GEOFENCE_TRANSITION_DWELL", "", MapsActivity.class);
break;
case Geofence.GEOFENCE_TRANSITION_EXIT:
Toast.makeText(context, "GEOFENCE_TRANSITION_EXIT", Toast.LENGTH_SHORT).show();
notificationHelper.sendHighPriorityNotification("GEOFENCE_TRANSITION_EXIT", "", MapsActivity.class);
break;
}
}
}