java - GoogleApiClient 尚未连接，即使调用了 onConnected 并且我正在 onCreate 中创建我的 GoogleApiClient

Question

我在这里查看了这个问答:GoogleApiClient is throwing "GoogleApiClient is not connected yet" AFTER onConnected function getting called

因为它似乎与我所经历的相似，但事实并非如此。该用户的问题是他们在 onStart() 方法中声明了他们的 api 客户端，我在 onCreate() 方法中创建了我的，就像答案所建议的那样。然而，我仍然遇到同样的错误。

这是这三种方法的代码:

protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    /* Butter knife creates the variables */
    ButterKnife.bind(this);

    /* Startup location services */
    locationRequest = LocationRequest.create()
            .setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY)
            .setInterval(10 * 1000)        // 10 seconds, in milliseconds
            .setFastestInterval(1 * 1000); // 1 second, in milliseconds

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

    progressBar.setVisibility(View.INVISIBLE);

    refreshImageView.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            getForecast();
        }
    });
}

@Override
protected void onStart() {
    super.onStart();
    mGoogleApiClient.connect();
    Log.i("Connected!!!", "WERE CONNECTED");
}

@Override
protected void onResume() {
    super.onResume();
    if (!mGoogleApiClient.isConnected()) {
        mGoogleApiClient.connect();
    }

    resumeLocationUpdates();

}
private void resumeLocationUpdates() {
    Log.i("RESUMING", "RESUMING LOCATION UPDATES");
    LocationServices.FusedLocationApi.requestLocationUpdates(mGoogleApiClient, locationRequest, this);
}

这是记录器显示的内容，这让我感到困惑，因为它显示已连接但应用程序崩溃说未连接...

-14 02:25:13.582 25885-25885/? I/Connected!!!: WERE CONNECTED
11-14 02:25:13.582 25885-25885/? I/RESUMING: RESUMING LOCATION UPDATES
11-14 02:25:13.582 25885-25885/? D/AndroidRuntime: Shutting down VM
11-14 02:25:13.583 25885-25885/? E/AndroidRuntime: FATAL EXCEPTION: main
11-14 02:25:13.583 25885-25885/? E/AndroidRuntime: Process: lpadron.me.weatherly, PID: 25885
11-14 02:25:13.583 25885-25885/? E/AndroidRuntime: java.lang.RuntimeException: Unable to resume activity {lpadron.me.weatherly/lpadron.me.weatherly.MainActivity}: java.lang.IllegalStateException: GoogleApiClient is not connected yet.

Answer 1

您的问题出在onResume 逻辑中:

@Override
protected void onResume() {
    super.onResume();
    if (!mGoogleApiClient.isConnected()) {
        mGoogleApiClient.connect();
    }

    resumeLocationUpdates();

}
private void resumeLocationUpdates() {
    Log.i("RESUMING", "RESUMING LOCATION UPDATES");
    LocationServices.FusedLocationApi.requestLocationUpdates(mGoogleApiClient, locationRequest, this);
}

对 mGoogleApiClient.connect() 的调用是异步的。它在连接完成之前返回，并且您在客户端连接之前请求位置更新。您需要将 requestLocationUpdates 调用移至 GoogleApiClient.onConnected 回调。在此事件之后，您的客户端已连接。

@Override
protected void onResume() {
    super.onResume();
    if (!mGoogleApiClient.isConnected()) {
        mGoogleApiClient.connect();
    }   
}

@Override
public void onConnected(Bundle bundle) {
    resumeLocationUpdates();
}