为什么 LocationSettingsResult startResolutionForResult 不调用 onActivityResult？

我看过这个问答LocationSettingsRequest 对话框 - 跳过 onActivityResult() https://stackoverflow.com/questions/31235564/locationsettingsrequest-dialog-onactivityresult-skipped。这不是同一个问题，因为所有事情都已经在活动中完成了。

使用的代码几乎是 Google Play 服务示例中给出的逐字代码。

我有一个活动，LocationActivity，连接到 GoogleApiClient 以获取用户的位置。连接后我创建一个LocationSettingsRequest以确保位置设置已打开。活动正在实施中ResultCallback<LocationSettingsResult>.

ResultCallback<LocationSettingsResult>.onResult()被调用并且如果result.getStatus().getStatusCode() == LocationSettingsStatusCodes.RESOLUTION_REQUIRED then status.startResolutionForResult(this, REQUEST_CHECK_SETTINGS)被调用并显示对话框。问题是，无论选择什么，onActivityResult()从未被调用过。

@Override
public void onConnected(Bundle connectionHint) {
    Log.i(TAG, "GoogleApiClient connected");
    LocationSettingsRequest.Builder builder = new LocationSettingsRequest.Builder()
        .addLocationRequest(new LocationRequest().setPriority(LocationRequest.PRIORITY_LOW_POWER));

    PendingResult<LocationSettingsResult> result =
        LocationServices.SettingsApi.checkLocationSettings(googleApiClient, builder.build());

    result.setResultCallback(this);
}

.

@Override
public void onResult(LocationSettingsResult result) {
    final Status status = result.getStatus();
    Log.d(TAG, "onResult() called with: " + "result = [" + status.getStatusMessage() + "]");
    switch (status.getStatusCode()) {
        case LocationSettingsStatusCodes.SUCCESS:
            getLocation();
            break;
        case LocationSettingsStatusCodes.RESOLUTION_REQUIRED:
            // Location settings are not satisfied. But could be fixed by showing the user
            // a dialog.
            try {
                // Show the dialog by calling startResolutionForResult(),
                // and check the result in onActivityResult().
                status.startResolutionForResult(this, REQUEST_CHECK_SETTINGS);
            } catch (IntentSender.SendIntentException e) {
                Log.d(TAG, "", e);
                // Ignore the error.
            }
            break;
        case LocationSettingsStatusCodes.SETTINGS_CHANGE_UNAVAILABLE:
            showManualInputDialog();
            break;
    }
}

我从来没有到过这里：

@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    Log.d(TAG, "onActivityResult() called with: " + "requestCode = [" + requestCode + "], resultCode = [" + resultCode + "], data = [" + data + "]");
    switch (requestCode) {
        case REQUEST_CODE_RESOLUTION:
            retryConnecting();
            break;
        case REQUEST_CHECK_SETTINGS:
            if (resultCode == Activity.RESULT_OK) {
                getLocation();
            } else {
                showManualInputDialog();
            }
            break;
        default:
            super.onActivityResult(requestCode, resultCode, data);
            break;
    }
}

作为旁白。它在我的 S3 上运行过几次。据我所知，当我选择不再询问时，它就停止工作了。但是，它从未在模拟器或 Tab 10 上运行过，也不再在我的 S3 上运行。

如果您在 Fragment 中运行此代码，则不要使用 startResolutionForResult()。而是使用startIntentSenderForResult(status.getResolution().getIntentSender(), REQUEST_CODE_LOCATION_SETTING, null, 0, 0, 0, null);

并覆盖片段中的 onactivityResult() 。 结果将仅传递给此方法。