无法在Android Studio中解析符号“ OnSuccessListener”

Question

我得到了这种奇怪的行为，即在进行git克隆并在另一台机器上构建之后，我无法将package com.hehe.trumpcard; import android.content.Context; import android.support.v7.app.AppCompatActivity; import android.os.Bundle; import android.view.Menu; import android.view.MenuItem; import android.util.Log; import android.view.WindowManager; import org.opencv.android.*; import org.opencv.android.CameraBridgeViewBase.CvCameraViewListener; import org.opencv.core.*; import org.opencv.imgproc.Imgproc; import org.opencv.objdetect.CascadeClassifier; import java.io.File; import java.io.FileOutputStream; import java.io.InputStream; public class Main3Activity extends AppCompatActivity implements CvCameraViewListener { private CameraBridgeViewBase openCvCameraView; private CascadeClassifier cascadeClassifier; private Mat grayscaleImage; private int absoluteFaceSize; private BaseLoaderCallback mLoaderCallback = new BaseLoaderCallback(this) { @Override public void onManagerConnected(int status) { switch (status){ case LoaderCallbackInterface.SUCCESS: initializeOpenCVDependencies(); break; default: super.onManagerConnected(status); break; } } }; private void initializeOpenCVDependencies(){ try{ // Copy the resource into a temp file so OpenCV can load it InputStream is = getResources().openRawResource(R.raw.haarcascade_fullbody); File cascadeDir = getDir("cascade", Context.MODE_APPEND); File mCascadeFile = new File(cascadeDir, "haarcascade_fullbody.xml"); FileOutputStream os = new FileOutputStream(mCascadeFile); byte[] buffer = new byte[4096]; int bytesRead; while ((bytesRead = is.read(buffer)) != -1) { os.write(buffer, 0, bytesRead); } is.close(); os.close(); // Load the cascade classifier cascadeClassifier = new CascadeClassifier(mCascadeFile.getAbsolutePath()); } catch (Exception e) { Log.e("OpenCVActivity", "Error loading cascade", e); } // And we are ready to go openCvCameraView.enableView(); } @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); getWindow().addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON); openCvCameraView = new JavaCameraView(this, -1); setContentView(openCvCameraView); openCvCameraView.setCvCameraViewListener(this); //setContentView(R.layout.activity_main); } @Override public void onCameraViewStarted(int width, int height) { grayscaleImage = new Mat(height, width, CvType.CV_8UC4); // The faces will be a 20% of the height of the screen absoluteFaceSize = (int) (height * 0.2); } @Override public void onCameraViewStopped() { } @Override public Mat onCameraFrame(Mat aInputFrame) { // Create a grayscale image Imgproc.cvtColor(aInputFrame, grayscaleImage, Imgproc.COLOR_RGBA2RGB); MatOfRect faces = new MatOfRect(); // Use the classifier to detect faces if (cascadeClassifier != null) { cascadeClassifier.detectMultiScale(grayscaleImage, faces, 1.1, 2, 2, new Size(absoluteFaceSize, absoluteFaceSize), new Size()); } // If there are any faces found, draw a rectangle around it Rect[] facesArray = faces.toArray(); for (int i = 0; i <facesArray.length; i++) Imgproc.rectangle(aInputFrame, facesArray[i].tl(), facesArray[i].br(), new Scalar(0, 255, 0, 255), 3); return aInputFrame; } @Override public void onResume() { super.onResume(); OpenCVLoader.initAsync(OpenCVLoader.OPENCV_VERSION_3_0_0, this, mLoaderCallback); } } 导入我的代码中（在我之前的机器中可以解决）。但是，该项目可以正常运行并在模拟器上运行。但是由于侦听器无法解析，所以我无法进一步编写与Firebase相关的代码。

我尝试清理项目，重建，使缓存无效，但仍然没有运气。

等级依赖

OnSuccessListener

Answer 1

请尝试将其添加到您的应用程序等级文件中。

实现'com.google.android.gms：play-services-tasks：16.0.1'

Answer 2

您要做的是使所有firebase和gms版本都具有相同的编号，例如：

实施'com.google.firebase：firebase-auth：102.0' 实施'com.google.android.gms：play-services-auth：10.2.0'