以下是我不断在我的应用程序上遇到的 fatal error 。我正在尝试使用 Firebase 在我的应用程序上运行聊天信使功能。它正在运行，但此后一直使应用程序完全崩溃。我对代码进行了一些修改，希望能解决问题，但无济于事。
我一直在 youtbe 上关注本教程 https://www.youtube.com/watch?v=Xn0tQHpMDnM通过阅读评论，似乎没有其他人对我有类似的错误。
根据日志，发现错误在第99行-displayChatMessage();以及第 109 行 - adapter = new FirebaseListAdapter<ChatMessage>(this,ChatMessage.class,R.layout.chat_list_item,FirebaseDatabase.getInstance().getReference()) {
我希望这可能只是我造成的一个简单的代码错误，或者它可能与我的 gradle 构建有关。以下是我收到的错误日志。
FATAL EXCEPTION: main
Process: com.example.aids.a09application, PID: 30713
java.lang.NoSuchMethodError: No virtual method zzEq()Z in class Lcom/google/firebase/FirebaseApp; or its super classes (declaration of 'com.google.firebase.FirebaseApp' appears in /data/app/com.example.aids.a09application-2/split_lib_dependencies_apk.apk:classes33.dex)
at com.google.firebase.database.FirebaseDatabase.getInstance(Unknown Source)
at com.google.firebase.database.FirebaseDatabase.getInstance(Unknown Source)
at com.example.aids.a09application.MainChatActivity.displayChatMessage(MainChatActivity.java:109)
at com.example.aids.a09application.MainChatActivity.onCreate(MainChatActivity.java:99)
at android.app.Activity.performCreate(Activity.java:6912)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1126)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2877)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2985)
at android.app.ActivityThread.-wrap14(ActivityThread.java)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1635)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:154)
at android.app.ActivityThread.main(ActivityThread.java:6692)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1468)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1358)
下面是我的应用程序中聊天信使的 MainActivity 类:
package com.example.aids.a09application;
import android.content.Intent;
import android.os.Bundle;
import android.support.annotation.NonNull;
import android.support.annotation.Nullable;
import android.support.design.widget.FloatingActionButton;
import android.support.design.widget.Snackbar;
import android.support.v7.app.AppCompatActivity;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.EditText;
import android.widget.ListView;
import android.widget.RelativeLayout;
import android.widget.TextView;
import android.text.format.DateFormat;
import com.firebase.ui.auth.AuthUI;
import com.firebase.ui.database.FirebaseListAdapter;
import com.google.android.gms.tasks.OnCompleteListener;
import com.google.android.gms.tasks.Task;
import com.google.firebase.auth.FirebaseAuth;
import com.google.firebase.database.FirebaseDatabase;
/**
* Created by Aids on 29/08/2017.
*/
public class MainChatActivity extends AppCompatActivity {
private static int SIGN_IN_REQUEST_CODE = 1;
private FirebaseListAdapter<ChatMessage> adapter;
RelativeLayout chat_activity_main;
FloatingActionButton fab;
@Override
public boolean onOptionsItemSelected(MenuItem item) {
if(item.getItemId() == (R.id.menu_signout))
{
AuthUI.getInstance().signOut( this ).addOnCompleteListener( new OnCompleteListener<Void>() {
@Override
public void onComplete(@NonNull Task<Void> task) {
Snackbar.make( chat_activity_main, "You have been signed out.", Snackbar.LENGTH_SHORT).show();
finish();
}
} );
}
return true;
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate( R.menu.chat_main_menu, menu );
return true;
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult( requestCode, resultCode, data );
if (requestCode == SIGN_IN_REQUEST_CODE)
{
if(resultCode == RESULT_OK)
{
Snackbar.make( chat_activity_main, "Succesfully signed in. Welcome!", Snackbar.LENGTH_SHORT).show();
displayChatMessage();
}
else {
Snackbar.make( chat_activity_main, "We couldn't sign you in. Please try again!", Snackbar.LENGTH_SHORT).show();
finish();
}
}
}
@Override
protected void onCreate(@Nullable Bundle savedInstanceState) {
super.onCreate( savedInstanceState );
setContentView( R.layout.chat_activity_main );
chat_activity_main = (RelativeLayout) findViewById( R.id.chat_activity_main );
fab = (FloatingActionButton) findViewById( R.id.fab );
fab.setOnClickListener( new View.OnClickListener() {
@Override
public void onClick(View view) {
EditText input = (EditText)findViewById( R.id.input );
FirebaseDatabase.getInstance().getReference().push().setValue( new ChatMessage(input.getText().toString(),
FirebaseAuth.getInstance().getCurrentUser().getEmail()));
input.setText( "" );
}
} );
if (FirebaseAuth.getInstance().getCurrentUser() == null) {
startActivityForResult( AuthUI.getInstance().createSignInIntentBuilder().build(), SIGN_IN_REQUEST_CODE );
} else {
Snackbar.make( chat_activity_main, "Welcome" + FirebaseAuth.getInstance().getCurrentUser().getEmail(), Snackbar.LENGTH_SHORT ).show();
//Load Content
displayChatMessage();
}
}
private void displayChatMessage() {
ListView listofMessage = (ListView) findViewById( R.id.list_of_messages );
adapter = new FirebaseListAdapter<ChatMessage>(this,ChatMessage.class,R.layout.chat_list_item,FirebaseDatabase.getInstance().getReference()) {
@Override
protected void populateView(View v, ChatMessage model, int position) {
//Get references to the views of chat_list_item.xml
TextView messageText, messageUser, messageTime;
messageText = (TextView) v.findViewById( R.id.message_text );
messageUser = (TextView) v.findViewById( R.id.message_user );
messageTime = (TextView) v.findViewById( R.id.message_time );
messageText.setText( model.getMessageText() );
messageUser.setText( model.getMessageUser() );
messageTime.setText( DateFormat.format( "dd-mm-yyyy (HH:MM:SS)",model.getMessageTime() ) );
}
};
listofMessage.setAdapter( adapter );
}
}
Gradle 构建模块:应用
apply plugin: 'com.android.application'
android {
compileSdkVersion 26
buildToolsVersion "26.0.1"
defaultConfig {
applicationId "com.example.aids.a09application"
minSdkVersion 16
targetSdkVersion 25
versionCode 1
versionName "1.0"
testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
aaptOptions.cruncherEnabled = false
aaptOptions.useNewCruncher = false
}
buildTypes {
release {
minifyEnabled false
proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
}
}
}
android {
useLibrary 'org.apache.http.legacy'
}
dependencies {
compile fileTree(dir: 'libs', include: ['*.jar'])
androidTestCompile('com.android.support.test.espresso:espresso-core:2.2.2', {
exclude group: 'com.android.support', module: 'support-annotations'
})
compile 'com.google.firebase:firebase-core:11.2.0'
compile 'com.google.firebase:firebase-messaging:11.2.0'
compile 'com.android.support:appcompat-v7:26.0.1'
compile 'com.google.android.gms:play-services-maps:11.2.0'
compile 'com.google.firebase:firebase-auth:11.2.0' // ADDED
compile 'com.google.android.gms:play-services-auth:11.2.0' // ADDED
compile 'com.android.support.constraint:constraint-layout:1.0.2'
compile 'com.android.support:design:26.0.1'
compile 'com.android.support:support-v4:26.0.1'
compile 'com.android.support:recyclerview-v7:26.0.1'
compile 'com.firebaseui:firebase-ui-auth:2.3.0'
compile 'com.firebaseui:firebase-ui:2.3.0'
}
apply plugin: 'com.google.gms.google-services'
最佳答案
我在读取/写入 firebase 数据库时遇到了类似的问题，这个小改动对我有用。尝试删除不必要的 firebase 依赖项，并确保您对所有 firebase 依赖项使用相同的版本。就我而言，我更改了我的 firebase 依赖项:
implementation 'com.google.firebase:firebase-firestore:11.8.0'
implementation 'com.google.firebase:firebase-database:16.0.1'
implementation 'com.google.firebase:firebase-core:16.0.0'
对这些:
implementation 'com.google.firebase:firebase-firestore:11.8.0'
implementation 'com.google.firebase:firebase-database:11.8.0'
implementation 'com.google.firebase:firebase-core:11.8.0'
我相信您可能已经花了很多时间来解决这个问题。不妨值得一试 :)
关于java - NoSuchMethodError:Lcom/google/firebase/FirebaseApp 类中没有虚方法 zzEq()Z；，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/45949806/