這是有點轉發,我很抱歉,但我最後一次發佈它我認爲我明白了,但顯然不是。當我試圖撥打我使用的服務來獲取此錯誤由於:java.lang.IllegalStateException: GoogleApiClient is not connected yet.
因爲我試圖在GoogleApiClient連接之前調用LocationServices。所以在改變代碼後,我再也沒有收到錯誤信息,實際上我沒有在logcat中得到任何東西。 這是我開始從我的SearchActivity.class服務:服務從Activity中調用,但沒有得到任何logcat?
SearchActivity.class
button = (Button)findViewById(R.id.buttonPressed);
button.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
startService(new Intent(getBaseContext(), LocationService.class));
}
});
這是服務:
LocationService.class
public class LocationService extends Service implements GoogleApiClient.ConnectionCallbacks,
GoogleApiClient.OnConnectionFailedListener, LocationListener {
// LogCat tag
private static final String TAG = LocationService.class.getSimpleName();
private final static int PLAY_SERVICES_RESOLUTION_REQUEST = 1000;
private Location mLastLocation;
// Google client to interact with Google API
private GoogleApiClient mGoogleApiClient;
// boolean flag to toggle periodic location updates
private boolean mRequestingLocationUpdates = false;
private LocationRequest mLocationRequest;
// Location updates intervals in sec
private static int UPDATE_INTERVAL = 10000; // 10 sec
private static int FATEST_INTERVAL = 5000; // 5 sec
private static int DISPLACEMENT = 10; // 10 meters
@Override
public void onCreate() {
super.onCreate();
mGoogleApiClient = new GoogleApiClient.Builder(this)
.addConnectionCallbacks(this)
.addOnConnectionFailedListener(this)
.addApi(LocationServices.API).build();
}
@Override
public int onStartCommand(Intent intent, int flags, int startId) {
if (mGoogleApiClient != null) {
if(mGoogleApiClient.isConnected()) {
if (mLocationRequest != null) {
togglePeriodicLocationUpdates();
}
}
}
return START_NOT_STICKY;
}
@Override
public IBinder onBind(Intent intent) {
return null;
}
protected void createLocationRequest() {
mLocationRequest = new LocationRequest();
mLocationRequest.setInterval(UPDATE_INTERVAL);
mLocationRequest.setFastestInterval(FATEST_INTERVAL);
mLocationRequest.setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY);
mLocationRequest.setSmallestDisplacement(DISPLACEMENT);
}
private void togglePeriodicLocationUpdates() {
mGoogleApiClient.connect();
if(mGoogleApiClient.isConnected()) {
if (!mRequestingLocationUpdates) {
mRequestingLocationUpdates = true;
startLocationUpdates();
Log.d(TAG, "Periodic location updates started!");
} else {
mRequestingLocationUpdates = false;
// Stopping the location updates
stopLocationUpdates();
Log.d(TAG, "Periodic location updates stopped!");
}
}
}
protected void stopLocationUpdates() {
LocationServices.FusedLocationApi.removeLocationUpdates(
mGoogleApiClient, this);
}
protected void startLocationUpdates() {
mGoogleApiClient.connect();
if(mGoogleApiClient.isConnected()) {
LocationServices.FusedLocationApi.requestLocationUpdates(
mGoogleApiClient, mLocationRequest, this);
}
}
@Override
public void onConnected(Bundle arg0) {
createLocationRequest();
}
@Override
public void onConnectionSuspended(int arg0) {
mGoogleApiClient.connect();
}
@Override
public void onConnectionFailed(ConnectionResult result) {
Log.i(TAG, "Connection failed: ConnectionResult.getErrorCode() = "
+ result.getErrorCode());
}
@Override
public void onLocationChanged(Location location) {
// Assign the new location
mLastLocation = location;
Toast.makeText(getApplicationContext(), "Location changed!",
Toast.LENGTH_SHORT).show();
}
@Override
public boolean stopService(Intent name) {
return super.stopService(name);
}
AndroidManifest.xml中
</activity>
<service android:name=".LocationService">
</service>
編輯:
嗯,我想出如何得到它的工作。 但現在我面臨的問題是必須點擊按鈕2次才能正常啓動。只需要改變onStartCommand()一點。
@Override
public int onStartCommand(Intent intent, int flags, int startId) {
if (mGoogleApiClient != null) {
mGoogleApiClient.connect();
if(mGoogleApiClient.isConnected()) {
if (mLocationRequest != null) {
togglePeriodicLocationUpdates();
}
}
}
return START_NOT_STICKY;
}
你期望的日誌中的logcat看?爲什麼不嘗試調試以查看它是如何運行的? – helleye
對於初學者來說,這個'Log.d(標籤,「定期位置更新開始!」); '和'Log.i(TAG, 「連接失敗:ConnectionResult.getErrorCode()=」 + result.getErrorCode());' – Ivan
當代碼調用connect()來連接到GoogleApi LocationServices,發生連接處理* * **異步。當執行線程從您的調用返回connect()時,您還沒有可用的連接。如果連接成功建立,則調用onConnected()回調。只有在那時你纔有一個可用的mGoogleApiClient。您應該查看一些[可用文檔](https://developers.google.com/android/guides/api-client#HandlingFailures)以更好地理解此處理。這有點複雜。 –