Android Google API客户端未连接

Question

Hey guys I have the Problem that when I created a new instance of the Google Api Client, and I called the method '.connect', I get a Exception which says that the GoogleApiClient is not connected yet.

MainActivity.java

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    this.googleApiClient = new GoogleApiClient.Builder(this)
        .addApi(LocationServices.API)
        .addConnectionCallbacks(this)
        .addOnConnectionFailedListener(this)
        .build();

    //Setup LocationRequest
    this.locationRequest = LocationRequest.create()
            .setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY)
            .setInterval(1000 * 10)
            .setInterval(1000 * 3);

    if (ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
        return;
    }
    LocationServices.FusedLocationApi.requestLocationUpdates(googleApiClient, locationRequest, this);
}
@Override
public void onStart(){
    super.onStart();
    this.googleApiClient.connect();
}

@Override
public void onStop(){
    super.onStop();
    this.googleApiClient.disconnect();
}

Exception:

08-27 22:54:04.536 11610-11610/at.ideafactory.spotted E/AndroidRuntime: FATAL EXCEPTION: main
                                                                    Process: at.ideafactory.spotted, PID: 11610
                                                                    java.lang.RuntimeException: Unable to start activity ComponentInfo{at.ideafactory.spotted/at.ideafactory.spotted.Activity.Main.MainActivity}: java.lang.IllegalStateException: GoogleApiClient is not connected yet.
                                                                        at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2596)
                                                                        at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2653)
                                                                        at android.app.ActivityThread.access$800(ActivityThread.java:156)
                                                                        at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1355)
                                                                        at android.os.Handler.dispatchMessage(Handler.java:102)
                                                                        at android.os.Looper.loop(Looper.java:157)
                                                                        at android.app.ActivityThread.main(ActivityThread.java:5872)
                                                                        at java.lang.reflect.Method.invokeNative(Native Method)
                                                                        at java.lang.reflect.Method.invoke(Method.java:515)
                                                                        at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:858)
                                                                        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:674)
                                                                        at dalvik.system.NativeStart.main(Native Method)
                                                                     Caused by: java.lang.IllegalStateException: GoogleApiClient is not connected yet.
                                                                        at com.google.android.gms.internal.zzpy.zzd(Unknown Source)
                                                                        at com.google.android.gms.location.internal.zzd.requestLocationUpdates(Unknown Source)
                                                                        at at.ideafactory.spotted.Activity.Main.MainActivity.onCreate(MainActivity.java:108)
                                                                        at android.app.Activity.performCreate(Activity.java:5312)
                                                                        at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1111)
                                                                        at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2552)
                                                                        at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2653) 
                                                                        at android.app.ActivityThread.access$800(ActivityThread.java:156) 
                                                                        at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1355) 
                                                                        at android.os.Handler.dispatchMessage(Handler.java:102) 
                                                                        at android.os.Looper.loop(Looper.java:157) 
                                                                        at android.app.ActivityThread.main(ActivityThread.java:5872) 
                                                                        at java.lang.reflect.Method.invokeNative(Native Method) 
                                                                        at java.lang.reflect.Method.invoke(Method.java:515) 
                                                                        at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:858) 
                                                                        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:674) 
                                                                        at dalvik.system.NativeStart.main(Native Method) 

Maybe anyone could help me with this problem.

Kind Regards

Answer 1

This is because you trying to connect() inside onStart. Put a null check inside both your onStart and onStop method like follows

@Override
public void onStart(){
    super.onStart();
    if(this.googleApiClient != null){
            this.googleApiClient.connect();
    }
}

Similarly in onStop() put a null check.

EDIT

You should do it as follows. Firstly implement these in your activity. And inside the OnConnected callback do as follows.

public class MainActivity extends AppCompatActivity implements
    GoogleApiClient.OnConnectionFailedListener,
    GoogleApiClient.ConnectionCallbacks,
    LocationListener {


    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        buildGoogleApiClient();
    }

    @Override
    public void onConnected(@Nullable Bundle bundle) {
        Log.d(TAG, "Connection established. Fetching location ..");
        mLocationRequest = new LocationRequest();
        mLocationRequest.setInterval(1000);
        mLocationRequest.setFastestInterval(1000);
        mLocationRequest.setPriority(LocationRequest.PRIORITY_BALANCED_POWER_ACCURACY);

        LocationServices.FusedLocationApi.requestLocationUpdates(mGoogleApiClient, mLocationRequest, this);
    }

    @Override
    public void onLocationChanged(Location location) {

        Log.d("Lat: " + location.getLatitude() + "Lng : " + location.getLongitude());    
        LatLng latLng = new LatLng(location.getLatitude(), location.getLongitude());
    }

    public synchronized void buildGoogleApiClient() {
        mGoogleApiClient = new GoogleApiClient.Builder(getBaseContext())
            .addConnectionCallbacks(this)
            .addOnConnectionFailedListener(this)
            .addApi(LocationServices.API)
            .build();
        mGoogleApiClient.connect();
    }

    @Override
    public void onPause() {
        super.onPause();
        //stop location updates when Activity is no longer active
        if (mGoogleApiClient != null) {
            LocationServices.FusedLocationApi.removeLocationUpdates(mGoogleApiClient, this);
        }
    }
}