Question

我的应用程序需要帮助。我一直在努力建立一个简单的位置应用程序。因此，我遵循Android开发人员培训（http://developer.android.com/training/location/retrieve-current.html）。但是，我坚持最后一部分。我的应用程序似乎在遇到此代码时崩溃，

mLocationClient.connect();

我已在设备中添加了权限和激活的位置服务。任何人都可以帮助我吗？

这是我的全部代码。

public class MainActivity extends FragmentActivity 
implements
ConnectionCallbacks, 
OnConnectionFailedListener{
private final static int CONNECTION_FAILURE_RESOLUTION_REQUEST = 9000;

private LocationClient mLocationClient;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    mLocationClient = new LocationClient(this, this, this);
}

@Override
protected void onStart(){
    super.onStart();
    mLocationClient.connect();
}

@Override 
protected void onStop(){
    mLocationClient.disconnect();
    super.onStop();
}

@Override
public boolean onCreateOptionsMenu(Menu menu) {
    // Inflate the menu; this adds items to the action bar if it is present.
    getMenuInflater().inflate(R.menu.main, menu);
    return true;
}

public static class ErrorDialogFragment extends DialogFragment{
    private Dialog mDialog;
    public ErrorDialogFragment(){
        super();
        mDialog = null;
    }
    public void setDialog(Dialog dialog){
        mDialog = dialog;
    }
    @Override
    public Dialog onCreateDialog(Bundle savedInstanceState){
        return mDialog;
    }
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent intent) {
    switch (requestCode) {
        case CONNECTION_FAILURE_RESOLUTION_REQUEST :

            switch (resultCode) {
                case Activity.RESULT_OK:
                break;
                default:
                break;
            }
        default:
           break;
    }
}

private boolean servicesConnected() {
    int resultCode =
            GooglePlayServicesUtil.isGooglePlayServicesAvailable(this);
    if (ConnectionResult.SUCCESS == resultCode) {
        Log.d("Location Update", "Google Play Services is available");
        return true;
    } else {
        Dialog dialog = GooglePlayServicesUtil.getErrorDialog(resultCode, this, 0);
        if (dialog != null) {
            //ErrorDialogFragment errorFragment = new ErrorDialogFragment();
            //errorFragment.setDialog(dialog);
            //errorFragment.show(getFragmentManager(), "Location Updates");
            //errorFragment.show(getSupportFragmentManager(), "Location Updates");
        }
        return false;
    }
}

@Override
public void onConnectionFailed(ConnectionResult connectionResult) {
    // TODO Auto-generated method stub
    if (connectionResult.hasResolution()) {
        try {

            connectionResult.startResolutionForResult(
                    this,
                    CONNECTION_FAILURE_RESOLUTION_REQUEST);

        } catch (IntentSender.SendIntentException e) {
            e.printStackTrace();
        }
    } else {
        showErrorDialog(connectionResult.getErrorCode());
    }
}

private void showErrorDialog(int errorCode) {
    Dialog errorDialog = GooglePlayServicesUtil.getErrorDialog(
        errorCode,
        this,
        CONNECTION_FAILURE_RESOLUTION_REQUEST);
    if (errorDialog != null) {
        ErrorDialogFragment errorFragment = new ErrorDialogFragment();
        errorFragment.setDialog(errorDialog);
    }
}

@Override
public void onConnected(Bundle arg0) {
    // TODO Auto-generated method stub
    Toast.makeText(this, "Connected", Toast.LENGTH_SHORT).show();

}

@Override
public void onDisconnected() {
    // TODO Auto-generated method stub
    Toast.makeText(this, "Disconnected. Please re-connect.", Toast.LENGTH_SHORT).show();
}

}

Answer 1

我认为您没有安装Google Play服务。您有方法servicesConnected（），但您不使用它。您应该在检查servicesConnected（）的if语句中将您的调用包装到mLocationClient.connect（）。

Answer 2

我有一个类似的问题，我忘记在应用程序中的清单中添加它：

<meta-data android:name="com.google.android.gms.version"
           android:value="@integer/google_play_services_version" />

再次阅读this寻求帮助。

Android基于位置的应用程序

2 个答案: