问题
Below is the fatal error that I keep getting on my App. I am trying to run a chat messenger feature on my application using Firebase. It was running however it has since kept crashing the app entirely. I've made a few edits to the code in the hope of resolving the issues, but to no avail.
I've been following this tutorial on youtbe https://www.youtube.com/watch?v=Xn0tQHpMDnM and it appears by reading the comments that no one else has a similiar error to me.
According to the log, the errors are found on line 99 - displayChatMessage(); as well as on Line 109 - adapter = new FirebaseListAdapter<ChatMessage>(this,ChatMessage.class,R.layout.chat_list_item,FirebaseDatabase.getInstance().getReference()) {
I'm hoping this maybe just a simple code error which I have created, or is it possible it could be to do with my gradle build. Below is the error log I am getting.
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)
Below is the MainActivity Class for the chat messenger in my application:
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 Build Module:App
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'
回答1:
I had a similar problem while reading/writing to firebase database this small change worked for me. Try removing unnecessary firebase dependencies and make sure you use the same version for all the firebase dependencies for those that you use. In my case I changed my firebase dependencies from:
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'
to these:
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'
I'm sure you might have spent a lot of time trying to fix this. Might as well turn out worth a shot :)
来源：https://stackoverflow.com/questions/45949806/nosuchmethoderror-no-virtual-method-zzeqz-in-class-lcom-google-firebase-fireb