java-使用融合的位置提供程序获取当前位置
作者：互联网
我有此活动想要获取当前位置,但现在没有如何以正确的方式完成它..REQUEST_CODE_ASK_PERMISSIONS是什么？
我必须生成一个吗？
public class MainActivity extends AppCompatActivity implements GoogleApiClient.ConnectionCallbacks,
GoogleApiClient.OnConnectionFailedListener {
private double longitude;
private double latitude;
private TextView latitudeText, longitudeText;
private FusedLocationProviderClient fusedLocationProviderClient;
private GoogleApiClient googleApiClient;
private LocationManager locationManager;
private LocationListener locationListener;
private LocationRequest locationRequest;
private LocationCallback locationCallback;
final private int REQUEST_CODE_ASK_PERMISSIONS = 123;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
latitudeText = findViewById(R.id.latitudeText);
longitudeText = findViewById(R.id.longitudeText);
getLocation();
}
private void getLocation() {
locationRequest = new LocationRequest()
.setInterval(2000).setFastestInterval(2000).setPriority(1000);
LocationSettingsRequest.Builder builder = new LocationSettingsRequest.Builder()
.addLocationRequest(locationRequest);
SettingsClient client = LocationServices.getSettingsClient(this);
Task<LocationSettingsResponse> task = client.checkLocationSettings(builder.build());
locationCallback = new LocationCallback() {
@Override
public void onLocationResult(LocationResult locationResult) {
for (Location location : locationResult.getLocations()) {
latitude = location.getLatitude();
longitude = location.getLongitude();
latitudeText.setText(String.valueOf(latitude));
longitudeText.setText(String.valueOf(longitude));
}
}
};
task.addOnSuccessListener(this, new OnSuccessListener<LocationSettingsResponse>() {
@Override
public void onSuccess(LocationSettingsResponse locationSettingsResponse) {
}
});
}
@Override
protected void onResume() {
super.onResume();
if (ContextCompat.checkSelfPermission(this,Manifest.permission.ACCESS_FINE_LOCATION)
!= PackageManager.PERMISSION_GRANTED){
ActivityCompat.requestPermissions(MainActivity.this,new String[]{Manifest
.permission.ACCESS_FINE_LOCATION},REQUEST_CODE_ASK_PERMISSIONS);
} else if(){
}
}
@Override
public void onConnected(@Nullable Bundle bundle) {
}
@Override
public void onConnectionSuspended(int i) {
}
@Override
public void onConnectionFailed(@NonNull ConnectionResult connectionResult) {
}
}
…………………………………………… …………………………………………… …………………………………………………………
解决方法:
在build.gradle(Module：app)中添加依赖项
implementation 'com.google.android.gms:play-services-location:16.0.0'
声明清单中的必要权限
<uses-permission android:name="android.permission.INTERNET"/>
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"/>
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION"/>
EasyLocationProvider.java
import android.annotation.SuppressLint;
import android.arch.lifecycle.Lifecycle;
import android.arch.lifecycle.LifecycleObserver;
import android.arch.lifecycle.OnLifecycleEvent;
import android.content.Context;
import android.content.IntentSender;
import android.os.Bundle;
import android.os.Looper;
import android.support.annotation.NonNull;
import android.support.annotation.Nullable;
import android.support.v7.app.AppCompatActivity;
import android.util.Log;
import android.widget.Toast;
import com.google.android.gms.common.ConnectionResult;
import com.google.android.gms.common.GoogleApiAvailability;
import com.google.android.gms.common.api.ApiException;
import com.google.android.gms.common.api.GoogleApiClient;
import com.google.android.gms.common.api.ResolvableApiException;
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.location.LocationSettingsRequest;
import com.google.android.gms.location.LocationSettingsResponse;
import com.google.android.gms.location.LocationSettingsStatusCodes;
import com.google.android.gms.location.SettingsClient;
import com.google.android.gms.tasks.OnCanceledListener;
import com.google.android.gms.tasks.OnFailureListener;
import com.google.android.gms.tasks.OnSuccessListener;
public class EasyLocationProvider implements LifecycleObserver {
private EasyLocationCallback callback;
private Context context;
private FusedLocationProviderClient mFusedLocationClient;
private SettingsClient mSettingsClient;
private LocationCallback mLocationCallback;
private LocationRequest mLocationRequest;
private GoogleApiClient mGoogleApiClient;
private LocationSettingsRequest mLocationSettingsRequest;
private long interval;
private long fastestInterval;
private int priority;
private double Latitude = 0.0, Longitude = 0.0;
private EasyLocationProvider(final Builder builder) {
context = builder.context;
callback = builder.callback;
interval = builder.interval;
fastestInterval = builder.fastestInterval;
priority = builder.priority;
}
@SuppressLint("MissingPermission")
public void requestLocationUpdate() {
mFusedLocationClient.requestLocationUpdates(mLocationRequest, mLocationCallback, Looper.myLooper());
}
private void connectGoogleClient() {
GoogleApiAvailability googleAPI = GoogleApiAvailability.getInstance();
int resultCode = googleAPI.isGooglePlayServicesAvailable(context);
if (resultCode == ConnectionResult.SUCCESS) {
mGoogleApiClient.connect();
} else {
int REQUEST_GOOGLE_PLAY_SERVICE = 988;
googleAPI.getErrorDialog((AppCompatActivity) context, resultCode, REQUEST_GOOGLE_PLAY_SERVICE);
}
}
@OnLifecycleEvent(Lifecycle.Event.ON_CREATE)
private void onCreateLocationProvider() {
}
@OnLifecycleEvent(Lifecycle.Event.ON_RESUME)
private void onLocationResume() {
buildGoogleApiClient();
}
@SuppressLint("MissingPermission")
private synchronized void buildGoogleApiClient() {
mFusedLocationClient = LocationServices.getFusedLocationProviderClient(context);
mSettingsClient = LocationServices.getSettingsClient(context);
mGoogleApiClient = new GoogleApiClient.Builder(context)
.addConnectionCallbacks(new GoogleApiClient.ConnectionCallbacks() {
@Override
public void onConnected(@Nullable Bundle bundle) {
callback.onGoogleAPIClient(mGoogleApiClient, "Connected");
mLocationRequest = new LocationRequest();
mLocationRequest.setInterval(interval);
mLocationRequest.setFastestInterval(fastestInterval);
mLocationRequest.setPriority(priority);
mLocationRequest.setSmallestDisplacement(0);
LocationSettingsRequest.Builder builder = new LocationSettingsRequest.Builder();
builder.addLocationRequest(mLocationRequest);
builder.setAlwaysShow(true);
mLocationSettingsRequest = builder.build();
mSettingsClient
.checkLocationSettings(mLocationSettingsRequest)
.addOnSuccessListener(new OnSuccessListener<LocationSettingsResponse>() {
@Override
public void onSuccess(LocationSettingsResponse locationSettingsResponse) {
showLog("GPS is Enabled Requested Location Update");
requestLocationUpdate();
}
}).addOnFailureListener(new OnFailureListener() {
@Override
public void onFailure(@NonNull Exception e) {
int statusCode = ((ApiException) e).getStatusCode();
switch (statusCode) {
case LocationSettingsStatusCodes.RESOLUTION_REQUIRED:
try {
int REQUEST_CHECK_SETTINGS = 214;
ResolvableApiException rae = (ResolvableApiException) e;
rae.startResolutionForResult((AppCompatActivity) context, REQUEST_CHECK_SETTINGS);
} catch (IntentSender.SendIntentException sie) {
showLog("Unable to Execute Request");
}
break;
case LocationSettingsStatusCodes.SETTINGS_CHANGE_UNAVAILABLE:
showLog("Location Settings are Inadequate, and Cannot be fixed here. Fix in Settings");
}
}
}).addOnCanceledListener(new OnCanceledListener() {
@Override
public void onCanceled() {
showLog("onCanceled");
}
});
}
@Override
public void onConnectionSuspended(int i) {
connectGoogleClient();
callback.onGoogleAPIClient(mGoogleApiClient, "Connection Suspended");
}
})
.addOnConnectionFailedListener(new GoogleApiClient.OnConnectionFailedListener() {
@Override
public void onConnectionFailed(@NonNull ConnectionResult connectionResult) {
callback.onGoogleAPIClient(mGoogleApiClient, "" + connectionResult.getErrorCode() + " " + connectionResult.getErrorMessage());
}
})
.addApi(LocationServices.API)
.build();
connectGoogleClient();
mLocationCallback = new LocationCallback() {
@Override
public void onLocationResult(final LocationResult locationResult) {
super.onLocationResult(locationResult);
Latitude = locationResult.getLastLocation().getLatitude();
Longitude = locationResult.getLastLocation().getLongitude();
if (Latitude == 0.0 && Longitude == 0.0) {
showLog("New Location Requested");
requestLocationUpdate();
} else {
callback.onLocationUpdated(Latitude, Longitude);
}
}
};
}
@SuppressLint("MissingPermission")
public void removeUpdates() {
try {
callback.onLocationUpdateRemoved();
} catch (Exception e) {
e.printStackTrace();
}
}
private void showLog(String message) {
Log.e("EasyLocationProvider", "" + message);
}
public interface EasyLocationCallback {
void onGoogleAPIClient(GoogleApiClient googleApiClient, String message);
void onLocationUpdated(double latitude, double longitude);
void onLocationUpdateRemoved();
}
public static class Builder {
private Context context;
private EasyLocationCallback callback;
private long interval = 10 * 1000;
private long fastestInterval = 5 * 1000;
private int priority = LocationRequest.PRIORITY_HIGH_ACCURACY;
public Builder(Context context) {
this.context = context;
}
public EasyLocationProvider build() {
if (callback == null) {
Toast.makeText(context, "EasyLocationCallback listener can not be null", Toast.LENGTH_SHORT).show();
}
return new EasyLocationProvider(this);
}
public Builder setListener(EasyLocationCallback callback) {
this.callback = callback;
return this;
}
public Builder setInterval(long interval) {
this.interval = interval;
return this;
}
public Builder setFastestInterval(int fastestInterval) {
this.fastestInterval = fastestInterval;
return this;
}
public Builder setPriority(int priority) {
this.priority = priority;
return this;
}
}
}
采用：
EasyLocationProvider easyLocationProvider; //Declare Global Variable
easyLocationProvider = new EasyLocationProvider.Builder(BottomNavigationActivity.this)
.setInterval(5000)
.setFastestInterval(2000)
//.setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY)
.setListener(new EasyLocationProvider.EasyLocationCallback() {
@Override
public void onGoogleAPIClient(GoogleApiClient googleApiClient, String message) {
Log.e("EasyLocationProvider","onGoogleAPIClient: "+message);
}
@Override
public void onLocationUpdated(double latitude, double longitude) {
Log.e("EasyLocationProvider","onLocationUpdated:: "+ "Latitude: "+latitude+" Longitude: "+longitude);
}
@Override
public void onLocationUpdateRemoved() {
Log.e("EasyLocationProvider","onLocationUpdateRemoved");
}
}).build();
getLifecycle().addObserver(easyLocationProvider);
删除位置更新回调
@Override
protected void onDestroy() {
easyLocationProvider.removeUpdates();
getLifecycle().removeObserver(easyLocationProvider);
super.onDestroy();
}
注意：授予棉花糖和更高版本的设备的权限
标签：google-api,android-activity,java,android 来源： https://codeday.me/bug/20191109/2012787.html