Java Android Google API客户端未连接

嘿，伙计们，我有一个问题，当我创建一个新的GoogleAPI客户端实例时，我调用了方法'.connect'，我得到一个异常，说GoogleAppClient尚未连接

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();
}

例外情况：

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) 

也许有人能帮我解决这个问题

---

这是因为您试图在onStart内部连接（）。在onStart和onStop方法中都进行空检查，如下所示

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

类似地，在onStop（）中放入一个空检查

编辑

你应该按如下方式做。首先在你的活动中实施这些。在OnConnected回调中，执行以下操作

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);
        }
    }
}

---

我已经编辑了代码，请看一下@DavidNagl@DavidNagl你能运行这个吗？不，这个也不行。我现在试着像谷歌文档中描述的那样设置我的活动。也许这有用…我会让你知道这是否有用@gaurav4sama@DavidNagl很抱歉，我忘记添加LocationListener回调。在这个回调中，您可以得到该位置的lat和long。我已经对答案进行了相应的编辑，请立即尝试。