Question

好的，这个问题已经被问到，我已经尝试了所提供的所有解决方案，但它们似乎都没有用，

我正在使用Pubnub教程在Android应用上实时显示我的位置，我遇到了一些我无法解决的错误主要是 “无法解析方法requestLocationUpdates”

我在之前的帖子中看到要添加，导入android.location.LocationListener;进口但它没有改变任何东西。

如果有人对此有任何解决方案，那就太好了，如果你知道的话也是我的其他错误。

主要活动：

package nixerpubcom.nixerpub;

import android.location.Location;
import android.os.Bundle;
import android.support.design.widget.FloatingActionButton;
import android.support.design.widget.Snackbar;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import android.util.Log;
import android.view.KeyEvent;
import android.view.View;
import android.view.Menu;
import android.view.MenuItem;

import com.google.android.gms.common.api.GoogleApiClient;
import com.google.android.gms.location.LocationRequest;
import com.google.android.gms.location.LocationServices;
import com.pubnub.api.PubnubError;

import android.location.LocationListener;

import org.json.JSONException;
import org.json.JSONObject;

import javax.security.auth.callback.Callback;

public class MainActivity extends AppCompatActivity  implements GoogleApiClient.ConnectionCallbacks {

//Create Google API Client
private GoogleApiClient mGoogleApiClient;
//Create pubnub variable
private Pubnub mPubnub;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
    setSupportActionBar(toolbar);

    //Start The Google Client
    this.buildGoogleApiClient();
    mGoogleApiClient.connect();

    //Retrieve pubnub keys
    mPubnub = new Pubnub ("pub-c-fe4ed754-2b9d-4563-abb6-63c3f048f9ad","sub-c-82de7130-eacb-11e5-8346-0619f8945a4f");

    FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.fab);
    fab.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {
            Snackbar.make(view, "Replace with your own action", Snackbar.LENGTH_LONG)
                    .setAction("Action", null).show();
        }
    });
}

//Google Api build Method
private synchronized void buildGoogleApiClient() {
    mGoogleApiClient = new GoogleApiClient.Builder(this)
            .addConnectionCallbacks(this).addApi(LocationServices.API)
            .build();
}


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

@Override
public boolean onOptionsItemSelected(MenuItem item) {
    // Handle action bar item clicks here. The action bar will
    // automatically handle clicks on the Home/Up button, so long
    // as you specify a parent activity in AndroidManifest.xml.
    int id = item.getItemId();

    //noinspection SimplifiableIfStatement
    if (id == R.id.action_settings) {
        return true;
    }

    return super.onOptionsItemSelected(item);
}

// Implement the Connection Callback
@Override
public void onConnected(Bundle connectionHint) {
    LocationRequest mLocationRequest = createLocationRequest();
    LocationServices.FusedLocationApi.requestLocationUpdates(
            mGoogleApiClient, mLocationRequest, this);
}
@Override
public void onConnectionSuspended(int cause) {

    Log.d(TAG, "Connection to Google API Suspended ");

}

private LocationRequest createLocationRequest() {
    LocationRequest mLocationRequest = new LocationRequest();
    mLocationRequest.setInterval(10000);
    mLocationRequest.setFastestInterval(5000);
    mLocationRequest.setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY);
    return mLocationRequest;
}

@Override
public void onLocationChanged(Location location) {
    broadcastLocation(location);
}


private void broadcastLocation(Location location) {
    JSONObject message = new JSONObject();
    try {
        message.put("lat", location.getLatitude());
        message.put("lng", location.getLongitude());
        message.put("alt", location.getAltitude());
    } catch (JSONException e) {
        Log.e(TAG, e.toString());
    }
    mPubnub.publish("A Channel Name", message, publishCallback);
}

KeyEvent.Callback publishCallback = new Callback() {
    @Override
    public void successCallback(String channel, Object response) {
        Log.d("PUBNUB", response.toString());
    }

    @Override
    public void errorCallback(String channel, PubnubError error) {
        Log.e("PUBNUB", error.toString());
    }
};

}

This is the error I get for the Cannot resolve methods requestLocationUpdates, my other errors are also in there which is a TAG error and a pubnub error

我是新手，所以如果问题没有正确格式化，我会道歉。

Answer 1

在requestLocationUpdates方法中：

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

期望正在调用的类（MainActivity）实现 com.google.android.gms.location.LocationListener ，因此您需要实现它，或者使用匿名类更改它：

LocationServices.FusedLocationApi.requestLocationUpdates(
            mGoogleApiClient, mLocationRequest, new LocationListener() {
                @Override
                public void onLocationChanged(Location location) {
                    // Here you have the updated location
                }
            });
}

此类中未定义字符串TAG，因此在您的类上创建一个这样的字段：
```
private static final String TAG = "MainActivity";
```
提示：输入“logt”+在Android Studio中输入以生成此行。

您想要的回调

KeyEvent.Callback publishCallback = new Callback() {...}

不是来自KeyEvent，而是来自 com.pubnub.api.Callback

com.pubnub.api.Callback publishCallback = new Callback() {...}

请确保您的导入正确并且您要求在清单中找到位置：

android.permission.ACCESS_COARSE_LOCATION

或

android.permission.ACCESS_COARSE_LOCATION

无法使用Pubnub教程

1 个答案: