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由於某些原因，它僅在應用程序點擊onPause時更新文字瀏覽，例如當我點擊主頁按鈕或多任務按鈕時。有人能幫我弄清楚這是爲什麼嗎？位置只在應用程序不在焦點時更新TextView
MainActivity.java：
import android.app.PendingIntent;
import android.content.Intent;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.widget.TextView;
import android.widget.Toast;
public class MainActivity extends AppCompatActivity {
private String lat, lon;
private TextView longTextView, latTextView;
LocationService locationService = new LocationService(this);
private Intent intentService;
private PendingIntent pendingIntent;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
latTextView = (TextView) findViewById(R.id.latitude_textview);
longTextView = (TextView) findViewById(R.id.longitude_textview);
}
@Override
protected void onStart() {
super.onStart();
locationService.buildGoogleApiClient();
locationService.apiConnect();
if (latTextView != null && longTextView != null) {
latTextView.setText(locationService.getLat());
longTextView.setText(locationService.getLon());
Toast.makeText(getApplicationContext(), " Actually got location", Toast.LENGTH_SHORT)
.show();
} else {
Toast.makeText(getApplicationContext(), "The shit was null fam", Toast.LENGTH_LONG)
.show();
}
}
@Override
protected void onStop() {
super.onStop();
locationService.apiDisconnect();
}
}
LocationService.java：
import android.Manifest;
import android.app.Activity;
import android.app.Service;
import android.content.Context;
import android.content.Intent;
import android.content.pm.PackageManager;
import android.location.Location;
import android.os.Bundle;
import android.os.IBinder;
import android.support.annotation.NonNull;
import android.support.annotation.Nullable;
import android.support.v4.app.ActivityCompat;
import android.util.Log;
import com.google.android.gms.common.ConnectionResult;
import com.google.android.gms.common.api.GoogleApiClient;
import com.google.android.gms.location.FusedLocationProviderApi;
import com.google.android.gms.location.LocationListener;
import com.google.android.gms.location.LocationRequest;
import com.google.android.gms.location.LocationServices;
import static com.google.android.gms.wearable.DataMap.TAG;
public class LocationService extends Service implements GoogleApiClient.ConnectionCallbacks,
GoogleApiClient.OnConnectionFailedListener, LocationListener {
// ============================================================= Variables
Context context;
Location mLastLocation;
private GoogleApiClient mGoogleApiClient;
private LocationRequest mLocationRequest;
private String lat, lon;
final static String[] LOCATION_PERMISSIONS = {Manifest.permission.ACCESS_COARSE_LOCATION, Manifest.permission.ACCESS_FINE_LOCATION};
public static final long UPDATE_INTERVAL_IN_MILLISECONDS = 10000;
public static final long UPDATE_FASTEST_INTERVAL_IN_MILLISECONDS = UPDATE_INTERVAL_IN_MILLISECONDS/2;
public static boolean isEnded = false;
public static Boolean requestingLocationUpdates;
protected String lastUpdateTime;
final int GOOGLEAPI_REQUEST_CODE = 24;
private FusedLocationProviderApi fusedLocationProviderApi = LocationServices.FusedLocationApi;
// ============================================================= Constructor
public LocationService(Context context) {
this.context = context;
}
// ============================================================= Getters/Setters
public String getLon() {
return lon;
}
public void setLon(String lon) {
this.lon = lon;
}
public String getLat() {
return lat;
}
public void setLat(String lat) {
this.lat = lat;
}
// ============================================================= Methods
synchronized void buildGoogleApiClient() {
mGoogleApiClient = new GoogleApiClient.Builder(context)
.addConnectionCallbacks(this)
.addOnConnectionFailedListener(this)
.addApi(LocationServices.API)
.build();
}
public void apiConnect() {
mGoogleApiClient.connect();
}
public void apiDisconnect() {
mGoogleApiClient.disconnect();
}
void updateUI() {
}
// ============================================================= Implemented Location Methods
@Override
public void onLocationChanged(Location location) {
setLat(String.valueOf(location.getLatitude()));
setLon(String.valueOf(location.getLongitude()));
}
@Override
public void onConnectionFailed(@NonNull ConnectionResult connectionResult) {
Log.i(TAG, "Connection failed: ConnectionResult.getErrorCode() = " + connectionResult.getErrorCode());
}
@Override
public void onConnected(@Nullable Bundle bundle) {
mLocationRequest = LocationRequest.create();
mLocationRequest.setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY);
mLocationRequest.setInterval(UPDATE_INTERVAL_IN_MILLISECONDS); // Sets Location to update every second
mLocationRequest.setFastestInterval(UPDATE_FASTEST_INTERVAL_IN_MILLISECONDS); // The fastest location can update is every half-second
startLocationUpdates();
// TODO come back to this to see whats up
/* mLastLocation = LocationServices.FusedLocationApi.getLastLocation(
mGoogleApiClient);*/
if (mLastLocation != null) {
setLat(String.valueOf(mLastLocation.getLatitude()));
setLon(String.valueOf(mLastLocation.getLongitude()));
}
}
@Override
public void onConnectionSuspended(int i) {
}
protected void startLocationUpdates() {
/*if (!requestingLocationUpdates) {
requestingLocationUpdates = true;*/
if (ActivityCompat.checkSelfPermission(context, android.Manifest.permission.ACCESS_FINE_LOCATION)
!= PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(context, android.Manifest.permission.ACCESS_COARSE_LOCATION)
!= PackageManager.PERMISSION_GRANTED) {
ActivityCompat.requestPermissions((Activity) context, LOCATION_PERMISSIONS, GOOGLEAPI_REQUEST_CODE);
} else {
LocationServices.FusedLocationApi.requestLocationUpdates(mGoogleApiClient, mLocationRequest, this);
}
Log.i(TAG, " startLocationUpdates===");
isEnded = true;
//}
}
// ============================================================= Implemented Service Methods
@Nullable
@Override
public IBinder onBind(Intent intent) {
return null;
}
@Override
public int onStartCommand(Intent intent, int flags, int startId) {
// Within {@code onPause()}, we pause location updates, but leave the
// connection to GoogleApiClient intact. Here, we resume receiving
// location updates if the user has requested them.
Log.d("LOC", "Service init...");
isEnded = false;
requestingLocationUpdates = false;
lastUpdateTime = "";
buildGoogleApiClient();
if (mGoogleApiClient.isConnected() && requestingLocationUpdates) {
startLocationUpdates();
}
return Service.START_REDELIVER_INTENT;
}
}