我是android的新手，尝试使用两个标签实现一个活动，显示我从GPS服务获得的坐标，我想用坐标值在地图中标记当前位置（使用标记协调值）我从GPS服务获得。请帮助我在地图中实施Geo Fencing。
GPS服务
package com.app.servicegps;
/**
* Created by Android on 29-Dec-16.
*/
import android.app.Service;
import android.content.Context;
import android.content.Intent;
import android.location.Location;
import android.location.LocationListener;
import android.location.LocationManager;
import android.os.Bundle;
import android.os.IBinder;
import android.provider.Settings;
import android.support.annotation.Nullable;
public class GPS_Service extends Service {
private LocationListener listener;
private LocationManager locationManager;
@Nullable
@Override
public IBinder onBind(Intent intent) {
return null;
}
@Override
public void onCreate() {
listener = new LocationListener() {
@Override
public void onLocationChanged(Location location) {
Intent i = new Intent("location_update");
i.putExtra("coordinatesLongt",location.getLongitude());
i.putExtra("coordinatesLangt",location.getLatitude());
sendBroadcast(i);
}
@Override
public void onStatusChanged(String s, int i, Bundle bundle) {
}
@Override
public void onProviderEnabled(String s) {
}
@Override
public void onProviderDisabled(String s) {
Intent i = new Intent(Settings.ACTION_LOCATION_SOURCE_SETTINGS);
i.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
startActivity(i);
}
};
locationManager = (LocationManager) getApplicationContext().getSystemService(Context.LOCATION_SERVICE);
//noinspection MissingPermission
locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER,3000,0,listener);
}
@Override
public void onDestroy() {
super.onDestroy();
if(locationManager != null){
//noinspection MissingPermission
locationManager.removeUpdates(listener);
}
}
}
地图活动
package com.app.servicegps;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.DialogInterface;
import android.content.Intent;
import android.content.IntentFilter;
import android.hardware.Sensor;
import android.hardware.SensorEvent;
import android.hardware.SensorEventListener;
import android.location.Location;
import android.support.v4.app.FragmentActivity;
import android.os.Bundle;
import com.google.android.gms.common.ConnectionResult;
import com.google.android.gms.common.GooglePlayServicesUtil;
import com.google.android.gms.location.LocationListener;
import com.google.android.gms.maps.CameraUpdateFactory;
import com.google.android.gms.maps.GoogleMap;
import com.google.android.gms.maps.model.BitmapDescriptorFactory;
import com.google.android.gms.maps.model.LatLng;
import com.google.android.gms.maps.model.MarkerOptions;
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.LatLng;
import com.google.android.gms.maps.model.Marker;
import com.google.android.gms.maps.model.MarkerOptions;
public class MapsActivity extends FragmentActivity implements LocationListener,OnMapReadyCallback,
SensorEventListener, DialogInterface.OnClickListener {
private GoogleMap mMap;
private BroadcastReceiver broadcastReceiver;
Marker now;
String langt = null;
String longt= null;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_maps);
// 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 onLocationChanged(Location location) {
if(now != null){
now.remove();
}
//TextView tvLocation = (TextView) findViewById(R.id.tv_location);
// Getting latitude of the current location
//double latitude = location.getLatitude();
// Getting longitude of the current location
// double longitude = location.getLongitude();
double latitude= Double.parseDouble(langt);
double longitude= Double.parseDouble(longt);
// Creating a LatLng object for the current location
// LatLng latLng = new LatLng(latitude, longitude);
LatLng latLng = new LatLng(latitude, longitude);
now = mMap.addMarker(new MarkerOptions().position(latLng));
// Showing the current location in Google Map
mMap.moveCamera(CameraUpdateFactory.newLatLng(latLng));
// Zoom in the Google Map
mMap.animateCamera(CameraUpdateFactory.zoomTo(15));
}
@Override
protected void onResume() {
super.onResume();
if(broadcastReceiver == null){
broadcastReceiver = new BroadcastReceiver() {
@Override
public void onReceive(Context context, Intent intent) {
//get value
if(intent.getAction().equals("location_update"))
{
langt=intent.getStringExtra("coordinatesLangt");
longt=intent.getStringExtra("coordinatesLongt");
}
}
};
}
registerReceiver(broadcastReceiver,new IntentFilter("location_update"));
}
/**
* 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;
// Add a marker in Sydney and move the camera
/* LatLng sydney = new LatLng(-34, 151);
mMap.addMarker(new MarkerOptions().position(sydney).title("Marker in Sydney"));
mMap.moveCamera(CameraUpdateFactory.newLatLng(sydney));*/
}
@Override
public void onClick(DialogInterface dialog, int which) {
}
@Override
public void onSensorChanged(SensorEvent event) {
}
@Override
public void onAccuracyChanged(Sensor sensor, int accuracy) {
}
}
主要活动
package com.app.servicegps;
import android.Manifest;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.content.pm.PackageManager;
import android.os.Build;
import android.support.annotation.NonNull;
import android.support.v4.content.ContextCompat;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;
public class MainActivity extends AppCompatActivity {
private Button btn_start, btn_stop;
private TextView textView;
private BroadcastReceiver broadcastReceiver;
@Override
protected void onResume() {
super.onResume();
if(broadcastReceiver == null){
broadcastReceiver = new BroadcastReceiver() {
@Override
public void onReceive(Context context, Intent intent) {
textView.append("\n" +intent.getExtras().get("coordinates"));
}
};
}
registerReceiver(broadcastReceiver,new IntentFilter("location_update"));
}
@Override
protected void onDestroy() {
super.onDestroy();
if(broadcastReceiver != null){
unregisterReceiver(broadcastReceiver);
}
}
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
btn_start = (Button) findViewById(R.id.button);
btn_stop = (Button) findViewById(R.id.button2);
textView = (TextView) findViewById(R.id.textView);
if(!runtime_permissions())
enable_buttons();
}
private void enable_buttons() {
btn_start.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
Intent i =new Intent(getApplicationContext(),GPS_Service.class);
startService(i);
}
});
btn_stop.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
Intent i = new Intent(getApplicationContext(),GPS_Service.class);
stopService(i);
}
});
}
private boolean runtime_permissions() {
if(Build.VERSION.SDK_INT >= 23 && ContextCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ContextCompat.checkSelfPermission(this, Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED){
requestPermissions(new String[]{Manifest.permission.ACCESS_FINE_LOCATION, Manifest.permission.ACCESS_COARSE_LOCATION},100);
return true;
}
return false;
}
@Override
public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
super.onRequestPermissionsResult(requestCode, permissions, grantResults);
if(requestCode == 100){
if( grantResults[0] == PackageManager.PERMISSION_GRANTED && grantResults[1] == PackageManager.PERMISSION_GRANTED){
enable_buttons();
}else {
runtime_permissions();
}
}
}
}
请帮助我进行地理围栏操作如何实施地图活动 我想要的基本是带有制表符片段的主要活动。 片段1 - 显示坐标 片段第二显示地图
当我进入标记位置时，A Geo Fencing To Notification。
答案 0 :(得分：0)
接口类
12-30 14:33:07.360 ? I/Test Tag: com.example.myapp.MainActivity.onCreate (MainActivity.java:11)
Hello World!
在主要活动中实施界面。
在GPS服务类中添加以下行。
public interface LocationInter {
void onUpdateLocation(Location location);
}
在位置更改中添加此行
private static LocationInter locationListener = null;
public void LocationInstance(LocationGuideInter locationListeners) {
if (locationListener == null) {
locationListener = locationListeners;
}
}
答案 1 :(得分：0)
这取自Android文档，因此您可以查看更多详细信息here
设置地理围栏监控
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"/>
创建地理围栏对象 使用Geofence.Builder创建地理围栏，为地理围栏设置所需的半径，持续时间和过渡类型。例如，要填充名为mGeofenceList的列表对象：
mGeofenceList.add(new Geofence.Builder()
// Set the request ID of the geofence. This is a string to identify this
// geofence.
.setRequestId(entry.getKey())
.setCircularRegion(
entry.getValue().latitude,
entry.getValue().longitude,
Constants.GEOFENCE_RADIUS_IN_METERS
)
.setExpirationDuration(Constants.GEOFENCE_EXPIRATION_IN_MILLISECONDS)
.setTransitionTypes(Geofence.GEOFENCE_TRANSITION_ENTER |
Geofence.GEOFENCE_TRANSITION_EXIT)
.build());
指定地理围栏和初始触发器
private GeofencingRequest getGeofencingRequest() {
GeofencingRequest.Builder builder = new GeofencingRequest.Builder();
builder.setInitialTrigger(GeofencingRequest.INITIAL_TRIGGER_ENTER);
builder.addGeofences(mGeofenceList);
return builder.build();
}
定义地理围栏过渡的意图
public class MainActivity extends FragmentActivity {
...
private PendingIntent getGeofencePendingIntent() {
// Reuse the PendingIntent if we already have it.
if (mGeofencePendingIntent != null) {
return mGeofencePendingIntent;
}
Intent intent = new Intent(this, GeofenceTransitionsIntentService.class);
// We use FLAG_UPDATE_CURRENT so that we get the same pending intent back when
// calling addGeofences() and removeGeofences().
return PendingIntent.getService(this, 0, intent, PendingIntent.
FLAG_UPDATE_CURRENT);
}
添加地理围栏
public class MainActivity extends FragmentActivity {
...
LocationServices.GeofencingApi.addGeofences(
mGoogleApiClient,
getGeofencingRequest(),
getGeofencePendingIntent()
).setResultCallback(this);
}
处理地理围栏转换
public class GeofenceTransitionsIntentService extends IntentService {
protected void onHandleIntent(Intent intent) {
GeofencingEvent geofencingEvent = GeofencingEvent.fromIntent(intent);
if (geofencingEvent.hasError()) {
String errorMessage = GeofenceErrorMessages.getErrorString(this,
geofencingEvent.getErrorCode());
Log.e(TAG, errorMessage);
return;
}
// Get the transition type.
int geofenceTransition = geofencingEvent.getGeofenceTransition();
// Test that the reported transition was of interest.
if (geofenceTransition == Geofence.GEOFENCE_TRANSITION_ENTER ||
geofenceTransition == Geofence.GEOFENCE_TRANSITION_EXIT) {
// Get the geofences that were triggered. A single event can trigger
// multiple geofences.
List triggeringGeofences = geofencingEvent.getTriggeringGeofences();
// Get the transition details as a String.
String geofenceTransitionDetails = getGeofenceTransitionDetails(
this,
geofenceTransition,
triggeringGeofences
);
// Send notification and log the transition details.
sendNotification(geofenceTransitionDetails);
Log.i(TAG, geofenceTransitionDetails);
} else {
// Log the error.
Log.e(TAG, getString(R.string.geofence_transition_invalid_type,
geofenceTransition));
}
}
答案 2 :(得分：0)