ClassNotFoundException与Parse和Facebook相关

Question

ClassNotFoundException与Parse和Facebook相关

3

我希望你可以帮助我解决一个问题。我正在尝试使用Parse将Facebook登录集成到我的应用程序中，但是当我调用方法时，出现了ClassNotFoundException错误。

 ParseFacebookUtils.logInWithReadPermissionsInBackground(LoginActivity.this, permissions, new LogInCallback()

错误堆栈跟踪：

05-15 10:36:00.749    3936-3936/kstr14.tipper E/AndroidRuntime﹕ FATAL EXCEPTION: main
Process: kstr14.tipper, PID: 3936
java.lang.IllegalStateException: Could not execute method of the activity
        at android.view.View$1.onClick(View.java:4007)
        at android.view.View.performClick(View.java:4756)
        at android.view.View$PerformClick.run(View.java:19749)
        at android.os.Handler.handleCallback(Handler.java:739)
        at android.os.Handler.dispatchMessage(Handler.java:95)
        at android.os.Looper.loop(Looper.java:135)
        at android.app.ActivityThread.main(ActivityThread.java:5221)
        at java.lang.reflect.Method.invoke(Native Method)
        at java.lang.reflect.Method.invoke(Method.java:372)
        at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:899)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:694)
 Caused by: java.lang.reflect.InvocationTargetException
        at java.lang.reflect.Method.invoke(Native Method)
        at java.lang.reflect.Method.invoke(Method.java:372)
        at android.view.View$1.onClick(View.java:4002)
        at android.view.View.performClick(View.java:4756)
        at android.view.View$PerformClick.run(View.java:19749)
        at android.os.Handler.handleCallback(Handler.java:739)
        at android.os.Handler.dispatchMessage(Handler.java:95)
        at android.os.Looper.loop(Looper.java:135)
        at android.app.ActivityThread.main(ActivityThread.java:5221)
        at java.lang.reflect.Method.invoke(Native Method)
        at java.lang.reflect.Method.invoke(Method.java:372)
        at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:899)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:694)
 Caused by: java.lang.NoClassDefFoundError: Failed resolution of: Lcom/parse/ParseTaskUtils;
        at com.parse.ParseFacebookUtils.logInWithReadPermissionsInBackground(ParseFacebookUtils.java:173)
        at kstr14.tipper.Activities.LoginActivity.facebookLoginPressed(LoginActivity.java:170)
        at java.lang.reflect.Method.invoke(Native Method)
        at java.lang.reflect.Method.invoke(Method.java:372)
        at android.view.View$1.onClick(View.java:4002)
        at android.view.View.performClick(View.java:4756)
        at android.view.View$PerformClick.run(View.java:19749)
        at android.os.Handler.handleCallback(Handler.java:739)
        at android.os.Handler.dispatchMessage(Handler.java:95)
        at android.os.Looper.loop(Looper.java:135)
        at android.app.ActivityThread.main(ActivityThread.java:5221)
        at java.lang.reflect.Method.invoke(Native Method)
        at java.lang.reflect.Method.invoke(Method.java:372)
        at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:899)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:694)
 Caused by: java.lang.ClassNotFoundException: Didn't find class "com.parse.ParseTaskUtils" on path: DexPathList[[zip file "/data/app/kstr14.tipper-1/base.apk"],nativeLibraryDirectories=[/vendor/lib, /system/lib]]
        at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:56)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:511)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:469)
        at com.parse.ParseFacebookUtils.logInWithReadPermissionsInBackground(ParseFacebookUtils.java:173)
        at kstr14.tipper.Activities.LoginActivity.facebookLoginPressed(LoginActivity.java:170)
        at java.lang.reflect.Method.invoke(Native Method)
        at java.lang.reflect.Method.invoke(Method.java:372)
        at android.view.View$1.onClick(View.java:4002)
        at android.view.View.performClick(View.java:4756)
        at android.view.View$PerformClick.run(View.java:19749)
        at android.os.Handler.handleCallback(Handler.java:739)
        at android.os.Handler.dispatchMessage(Handler.java:95)
        at android.os.Looper.loop(Looper.java:135)
        at android.app.ActivityThread.main(ActivityThread.java:5221)
        at java.lang.reflect.Method.invoke(Native Method)
        at java.lang.reflect.Method.invoke(Method.java:372)
        at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:899)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:694)
Suppressed: java.lang.ClassNotFoundException: com.parse.ParseTaskUtils
        at java.lang.Class.classForName(Native Method)
        at java.lang.BootClassLoader.findClass(ClassLoader.java:781)
        at java.lang.BootClassLoader.loadClass(ClassLoader.java:841)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:504)
        ... 16 more
 Caused by: java.lang.NoClassDefFoundError: Class not found using the boot class loader; no stack available

我在我的lib文件夹中有以下jar文件： Parse-1.9.1.jar javax.mail.jar bolts-android-1.2.0.jar ParseFacebookUtilsV4-1.9.2.jar 我已经尝试了各种方法来处理build.gradle文件的依赖项部分，因为我怀疑这个错误是由于某个库没有正确包含所导致的，但我尝试的所有方法都没有起作用。我尝试了不同的指定编译jar文件的方式以及以不同的顺序指定jar文件。目前我的build.gradle文件看起来是这样的：

apply plugin: 'com.android.application'

android {
    compileSdkVersion 21
    buildToolsVersion "21.1.2"
    defaultConfig {
        applicationId "kstr14.tipper"
        minSdkVersion 21
        targetSdkVersion 21
        versionCode 1
        versionName "1.0"
    }
    buildTypes {
        debug {
            debuggable true
        }
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android.txt'),     'proguard-rules.pro'
        }
    }
    productFlavors {
    }
}

repositories {
    mavenCentral()
}

dependencies {
    compile fileTree(include: ['*.jar'] ,dir: 'libs')
    compile files('libs/bolts-android-1.2.0.jar')
    compile 'com.parse.bolts:bolts-android:1.2.0'
    compile files('libs/Parse-1.9.1.jar')
    compile files('libs/ParseFacebookUtilsV4-1.9.2.jar')
    compile files('libs/javax.mail.jar')
    compile 'com.android.support:appcompat-v7:22.0.0'
    compile 'com.facebook.android:facebook-android-sdk:4.0.0'
    compile 'com.google.android.gms:play-services:7.0.0'
}

有人有建议吗？

另外，当我的应用程序由于错误而崩溃时，我按下“确定”按钮，然后Facebook登录屏幕仍然会显示..因此，我认为Facebook jar已经被导入了，问题在于Parse jar中。但是，我在尝试集成Facebook之前一直在使用Pars jar，并且它运行得非常好。我在导入Facebook jar的同时导入了bolts jar，因为我在某个地方读到必须这样做，所以可能是bolts jar出了问题？

编辑：添加了LoginActivity的代码：

package kstr14.tipper.Activities;

import android.content.Intent;
import android.os.Bundle;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentTransaction;
import android.support.v7.app.ActionBarActivity;
import android.util.Log;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.Window;
import android.widget.EditText;
import android.widget.Toast;

import com.facebook.FacebookSdk;
import com.parse.LogInCallback;
import com.parse.ParseException;
import com.parse.ParseFacebookUtils;
import com.parse.ParseObject;
import com.parse.ParseUser;
import com.parse.SignUpCallback;

import java.util.ArrayList;
import java.util.List;

import javax.mail.internet.AddressException;
import javax.mail.internet.InternetAddress;

import kstr14.tipper.Data.Category;
import kstr14.tipper.Data.Group;
import kstr14.tipper.Data.Tip;
import kstr14.tipper.R;


public class LoginActivity extends ActionBarActivity {

// UI elements for default login fragment
private EditText usernameDefaultLogin;
private EditText passwordDefaultLogin;

// UI elements for sign up fragment
private EditText usernameSignup;
private EditText emailSignup;
private EditText passwordSignup;
private EditText reenterPasswordSignup;


@Override
protected void onCreate(Bundle savedInstanceState) {
    getWindow().requestFeature(Window.FEATURE_ACTION_BAR);
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_login);
    getSupportActionBar().hide();

    // initalize facebook
    FacebookSdk.sdkInitialize(getApplicationContext());

    // Initialize Parse
    ParseObject.registerSubclass(Tip.class);
    ParseObject.registerSubclass(Category.class);
    ParseObject.registerSubclass(Group.class);
    ParseObject.registerSubclass(ParseUser.class);

    // check cache for current user - if found go directly to MainActivity
    ParseUser currentUser = ParseUser.getCurrentUser();
    if(currentUser != null) {
        Intent intent = new Intent(getApplicationContext(), MainActivity.class);
        startActivity(intent);
    }

    // otherwise set fragment to the default login screen
    DefaultLoginFragment defaultLoginFragment = new DefaultLoginFragment();
    getSupportFragmentManager().beginTransaction()
            .add(R.id.fragment_container, defaultLoginFragment).commit();
}

// Required for making Facebook login work
@Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
    super.onActivityResult(requestCode, resultCode, data);
    ParseFacebookUtils.onActivityResult(requestCode, resultCode, data);
}

/**
 * Method called when sign up button pressed on the default login fragment
 * Switches the default login fragment with a sign up fragment
 * @param view
 */
public void defaultSignUpPressed(View view) {
    SignUpFragment signUpFragment = new SignUpFragment();
    FragmentManager fragmentManager = getSupportFragmentManager();
    FragmentTransaction fragmentTransaction = fragmentManager.beginTransaction();

    // Replace the default login fragment with the sign up fragment,
    // and add the transaction to the back stack so the user can navigate back
    fragmentTransaction.replace(R.id.fragment_container, signUpFragment);
    fragmentTransaction.addToBackStack(null);
    fragmentTransaction.commit();
}

/**
 * Method called when login button pressed on the default login fragment
 * Attempts to log in the user, if successful goes to MainActivity
 * @param view
 */
public void defaultLoginPressed(View view) {
    // initialize UI elements for default login fragment
    usernameDefaultLogin = (EditText) findViewById(R.id.usernameDefaultLoginFragment);
    passwordDefaultLogin = (EditText) findViewById(R.id.passwordDefaultLoginFragment);

    // fetch input and attempt login
    String username = usernameDefaultLogin.getText().toString();
    String password = passwordDefaultLogin.getText().toString();
    ParseUser.logInInBackground(username, password, new LogInCallback() {
        public void done(ParseUser user, ParseException e) {
             if (user != null) {
                  Intent intent = new Intent(getApplicationContext(), MainActivity.class);
                  startActivity(intent);
             } else {
                  Toast.makeText(getApplicationContext(), "Login failed.", Toast.LENGTH_SHORT).show();
             }
        }
    });
}

/**
 * Method called when sign up button pressed in sign up fragment
 * Attempts to register the user, if successful goes to MainActivity
 * @param view
 */
public void signupPressed(View view) {
    // UI elements for sign up fragment
    usernameSignup = (EditText) findViewById(R.id.usernameSignupFragment);
    emailSignup = (EditText) findViewById(R.id.emailSignupFragment);
    passwordSignup = (EditText) findViewById(R.id.passwordSignupFragment);
    reenterPasswordSignup = (EditText) findViewById(R.id.reenterPasswordSignupFragment);

    String username = usernameSignup.getText().toString();
    String email = emailSignup.getText().toString();
    String password1 = passwordSignup.getText().toString();
    String password2 = reenterPasswordSignup.getText().toString();

    // validate passwords and email
    if(!validatePassword(password1, password2)) {
        Toast.makeText(getApplicationContext(), "Passwords do not match, try again.", Toast.LENGTH_SHORT).show();
    } else if (!validateEmail(email)) {
        Toast.makeText(getApplicationContext(), "Please enter a valid email.", Toast.LENGTH_SHORT).show();
    } else {
        ParseUser user = new ParseUser();
        user.setUsername(username);
        user.setPassword(password1);
        user.setEmail(email);
        user.signUpInBackground(new SignUpCallback() {
            public void done(ParseException e) {
                if (e == null) {
                    Intent intent = new Intent(getApplicationContext(), MainActivity.class);
                    startActivity(intent);
                } else {
                    Toast.makeText(getApplicationContext(), "Sign up failed. Please try again.", Toast.LENGTH_SHORT).show();
                }
            }
        });
    }
}

public void facebookLoginPressed(View view) {
    List<String> permissions = new ArrayList<String>();
    permissions.add("public_profile");
    ParseFacebookUtils.logInWithReadPermissionsInBackground(LoginActivity.this, permissions, new LogInCallback() {
        @Override
        public void done(ParseUser user, ParseException err) {
            if (user == null) {
                Log.d("MyApp", "Uh oh. The user cancelled the Facebook login.");
            } else if (user.isNew()) {
                Log.d("MyApp", "User signed up and logged in through Facebook!");
            } else {
                Log.d("MyApp", "User logged in through Facebook!");
            }
        }
    });
}

/**
 * Validates that two passwords are equal
 * @param password1
 * @param password2
 * @return
 */
public boolean validatePassword(String password1, String password2) {
    if(password1.equals(password2)) return true;
    else return false;
    }

/**
 * Validates the structure of an email address
 * @param email
 * @return
 */
public boolean validateEmail(String email) {
    boolean result = true;
    try {
        InternetAddress internetAddress = new InternetAddress(email);
        internetAddress.validate();
    } catch (AddressException e) {
        e.printStackTrace();
        result = false;
    }
    return result;
}

@Override
public boolean onCreateOptionsMenu(Menu menu) {
    getMenuInflater().inflate(R.menu.menu_login, menu);
    return true;
}

@Override
public boolean onOptionsItemSelected(MenuItem item) {
    int id = item.getItemId();

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

    return super.onOptionsItemSelected(item);
}
}

- user1419999

请在活动中发布您的代码。 - Exception

2个回答

2

在尝试了许多不同的方法后，包括升级AndroidStudio和gradle，我通过使用旧版本的Parse库解决了这个问题。我之前使用的是最新版本1.9.2，现在我使用的是1.9.0，它可以正常工作！因此，在新版本中一定存在某些错误。

- user1419999

也适用于我。 - George Pazdral

网页内容由stack overflow 提供, 点击上面的

可以查看英文原文，
原文链接

- n30r3b3l · Accepted Answer

我其实也遇到了这个问题。希望我可以为任何搜索此问题的人节省很多麻烦。答案不是使用旧版的SDK，而是确保您正在使用相同版本的Parse和ParseFacebookUtils。请查看上面的gradle文件。

compile 'com.parse.bolts:bolts-android:1.2.0'
compile files('libs/Parse-1.9.1.jar')
compile files('libs/ParseFacebookUtilsV4-1.9.2.jar')

你使用的是Parse-1.9.1和ParseFacebookUtilsV4-1.9.2。我之前也犯过同样的错误。我从另一个项目中导入了Parse-1.9.1并重新下载了SDK以导出FacebookUtils库。