Fused Location Provider app crashes and Logcat Understanding

Question

I ve made a small module to get current location coordinates using fused location provider.

My MainActivity.java file looks like this

TextView globalCoordinates = null;

private GoogleApiClient mGoogleApiClient;
private Location mLastLocation;
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    globalCoordinates = (TextView)findViewById(R.id.textView);

    mGoogleApiClient = new GoogleApiClient.Builder(this)
            .addConnectionCallbacks((GoogleApiClient.ConnectionCallbacks) getApplicationContext())
            .addOnConnectionFailedListener((GoogleApiClient.OnConnectionFailedListener)getApplicationContext())
            .addApi(LocationServices.API)
            .build();
}

@Override
public void onConnected(Bundle bundle) {
    mLastLocation = LocationServices.FusedLocationApi.getLastLocation(mGoogleApiClient);
    if (mLastLocation != null) {
        globalCoordinates.setText("Latitude: " + String.valueOf(mLastLocation.getLatitude())+ ""
                + "Longitude: " + String.valueOf(mLastLocation.getLongitude()));
    }
}

When I try to run the app on my mobile it gives the following error: Unfortunately, Module01 has stopped. The Logcat looks like this

java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.atifarain.module01/com.example.atifarain.module01.MainActivity}: java.lang.ClassCastException: android.app.Application cannot be cast to com.google.android.gms.common.api.GoogleApiClient$ConnectionCallbacks
        at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2200)
        at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2250)
        at android.app.ActivityThread.access$800(ActivityThread.java:139)
        at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1200)
        at android.os.Handler.dispatchMessage(Handler.java:102)
        at android.os.Looper.loop(Looper.java:136)
        at android.app.ActivityThread.main(ActivityThread.java:5105)
        at java.lang.reflect.Method.invokeNative(Native Method)
        at java.lang.reflect.Method.invoke(Method.java:515)
        at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:792)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:608)
        at dalvik.system.NativeStart.main(Native Method)
 Caused by: java.lang.ClassCastException: android.app.Application cannot be cast to com.google.android.gms.common.api.GoogleApiClient$ConnectionCallbacks
        at com.example.atifarain.module01.MainActivity.onCreate(MainActivity.java:30)
        at android.app.Activity.performCreate(Activity.java:5275)
        at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1087)
        at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2164)

How can I resolve this issue?

score 1 · Answer 1 · answered Mar 02 '15 at 11:11

Implement ConnectionCallbacks interface in MainActivity and pass MainActivity.this as parameter to addConnectionCallbacks method:

public class MainActivity extends  Activity 
                          implements GoogleApiClient.ConnectionCallbacks,
                                     GoogleApiClient.OnConnectionFailedListener{
  ....
}

Pass MainActivity.this :

 mGoogleApiClient = new GoogleApiClient.Builder(this)
                   .addConnectionCallbacks(MainActivity.this)
                   .addOnConnectionFailedListener(MainActivity.this)
                   .addApi(LocationServices.API)
                   .build();

Fused Location Provider app crashes and Logcat Understanding

1 Answers1