無法覆蓋 OnActivityResult 方法

Question

我不太擅長 Android Studio。

我開始了一個 WebView 項目，如果您忘記了密碼，我們可以登錄/注冊並編輯您的密碼。 我想添加從 Facebook 登錄。 我實現了 Facebook SDK 並在我的開發人員應用程序頁面中添加了包和哈希鍵。 我遵循了文檔，我選擇從我的網頁登錄用戶並使用我的 JavascriptInterface 中的logInWithReadPermissions方法調用 Facebook SDK。

我得到結果並從我的網頁返回結果。 要獲取此數據，我必須覆蓋我的Activity onActivityResult方法（從AppCompatActivity擴展）。 Android Studio 說我無法覆蓋onActivityResult方法，因為此方法不會從超類覆蓋。 此外，如果我刪除@Override ，則永遠不會調用該方法。

我從一個正在運行的舊 kotlin 項目中復制了這段代碼。 我不明白為什么我現在收到這個錯誤。

我的主要活動類：

package fr.versus.versus;

import android.annotation.SuppressLint;
import android.content.Context;
import android.content.Intent;
import android.content.pm.PackageInfo;
import android.content.pm.PackageManager;
import android.os.Build;
import android.support.annotation.NonNull;
import android.support.annotation.Nullable;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Base64;
import android.util.Log;
import android.webkit.CookieManager;
import android.webkit.JavascriptInterface;
import android.webkit.WebSettings;
import android.webkit.WebView;
import android.webkit.WebViewClient;
import android.widget.Toast;

import com.facebook.AccessToken;
import com.facebook.CallbackManager;
import com.facebook.login.LoginManager;
import com.google.android.gms.common.api.ApiException;
import com.google.android.gms.common.api.CommonStatusCodes;
import com.google.android.gms.safetynet.SafetyNet;
import com.google.android.gms.safetynet.SafetyNetApi;
import com.google.android.gms.tasks.OnFailureListener;
import com.google.android.gms.tasks.OnSuccessListener;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileWriter;
import java.io.IOException;
import java.security.MessageDigest;
import java.util.Arrays;

public class MainActivity extends AppCompatActivity {

    public WebView webview;

    @SuppressLint({"SetJavaScriptEnabled", "JavascriptInterface"})
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_webview);

        this.webview = findViewById(R.id.webview);

        this.webview.setWebViewClient(new WebViewClient() {
            public void onReceivedError(WebView view, int errorCode, String description, String failingUrl) {
                Toast.makeText(MainActivity.this, "Oh no! " + description, Toast.LENGTH_SHORT).show();
            }
        });

        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) {
            WebView.setWebContentsDebuggingEnabled(true);
        }

        this.webview.addJavascriptInterface(new JsObject(this), "android");

        WebSettings settings = this.webview.getSettings();

        settings.setJavaScriptEnabled(true);
        settings.setDomStorageEnabled(true);

        settings.setAllowFileAccessFromFileURLs(true);
        settings.setAllowUniversalAccessFromFileURLs(true);

        CookieManager.setAcceptFileSchemeCookies(true);

        CookieManager cookieManager = CookieManager.getInstance();
        cookieManager.setAcceptCookie(true);

        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
            cookieManager.setAcceptThirdPartyCookies(webview, true);
        }

        printHashKey(this);

        this.webview.loadUrl("file:///android_asset/main.html");
    }

    @Override
    protected void onActivityResult(Integer requestCode, Integer resultCode,Intent data) {
        CallbackManager callbackManager = CallbackManager.Factory.create();

        callbackManager.onActivityResult(requestCode, resultCode, data);
        super.onActivityResult(requestCode, resultCode, data);

        Log.e("FACEBOOK",AccessToken.getCurrentAccessToken().getToken());

        callJavascript("FACEBOOK", "{\"token\": \"" + AccessToken.getCurrentAccessToken().getToken() + "\",\"id\": " + AccessToken.getCurrentAccessToken().getUserId() + "}");
    }

    private void callJavascript(String returnType, String value) {
        final String returnTypeFormated = "\"" + returnType.replace("\"", "\\\"") + "\"";
        final String valueFormated = "\"" + value.replace("\"", "\\\"") + "\"";

        this.webview.post(new Runnable(){
            @Override
            public void run() {

                if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.KITKAT) {
                    MainActivity.this.webview.evaluateJavascript("inter(" + returnTypeFormated + "," + valueFormated + ");",null);
                }else{
                    MainActivity.this.webview.loadUrl("javascript:inter(" + returnTypeFormated + "," + valueFormated + ");");
                }
            }
        });
    }

    private class JsObject {

        private Context context;

        JsObject(Context ctx) {
            context = ctx;
        }

        @JavascriptInterface
        void getFacebook() {
            LoginManager.getInstance().logInWithReadPermissions(MainActivity.this, Arrays.asList("public_profile", "user_friends", "email", "user_birthday", "user_photos"));
        }

        @JavascriptInterface
        void getReCapcha(){
            SafetyNet.getClient(context).verifyWithRecaptcha("6LfQe2cUAAAAAFxXDxFxZlICH9TN8NV6cBJRcoNq")
                .addOnSuccessListener(MainActivity.this, new OnSuccessListener<SafetyNetApi.RecaptchaTokenResponse>() {
                    @Override
                    public void onSuccess(SafetyNetApi.RecaptchaTokenResponse response) {
                        if (!response.getTokenResult().isEmpty()) {
                            MainActivity.this.callJavascript("CAPCHA",response.getTokenResult());
                        }
                    }
                })
                .addOnFailureListener(MainActivity.this, new OnFailureListener() {
                    @Override
                    public void onFailure(@NonNull Exception e) {
                        if (e instanceof ApiException) {
                            ApiException apiException = (ApiException) e;
                            Log.d("CAPCHA", "Error message: " +
                                    CommonStatusCodes.getStatusCodeString(apiException.getStatusCode()));
                        } else {
                            Log.d("CAPCHA", "Unknown type of error: " + e.getMessage());
                        }
                    }
                });
        }
    }
}

我的應用程序 Gradle 文件：

apply plugin: 'com.android.application'

android {
    compileSdkVersion 27
    defaultConfig {
        applicationId "fr.versus.versus"
        minSdkVersion 17
        targetSdkVersion 27
        versionCode 1
        versionName "1.0"
        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
    }
    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }
    }
}

dependencies {
    implementation fileTree(dir: 'libs', include: ['*.jar'])
    //noinspection GradleCompatible
    implementation 'com.android.support:appcompat-v7:27.1.1'
    testImplementation 'junit:junit:4.12'
    androidTestImplementation 'com.android.support.test:runner:1.0.2'
    androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.2'

    implementation 'com.facebook.android:facebook-login:4.35.0'

    implementation 'com.google.android.gms:play-services-safetynet:15.0.1'

    implementation 'com.stripe:stripe-android:6.1.2'
}

為什么我不能覆蓋這個方法？

Answer 1

是因為方法 follow 不存在。

@Override
protected void onActivityResult(Integer requestCode, Integer resultCode,Intent data) {
    ...
}

用

@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    super.onActivityResult(requestCode, resultCode, data);
    ...
}

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