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);
}
}