I am currently working on a app that scans a QR Code and once the QR Code is scanned it will take you to a Google Form. I have included the permissions and the ZXing Library. When the QR Code is scanned it brings up a toast, although I have included that in my code. I am not completely sure how to change the result of the scanned QR Code. Any Help would be much appreciated.
This is my Android Manifest
apply plugin: 'com.android.application'
repositories {
maven { url 'http://repo1.maven.org/maven2' }
jcenter { url "http://jcenter.bintray.com/" }
}
android {
compileSdkVersion 25
buildToolsVersion "25.0.1"
defaultConfig {
applicationId "com.example.a934238.qrcodeapp"
minSdkVersion 15
targetSdkVersion 25
versionCode 1
versionName "1.0"
testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
}
buildTypes {
release {
minifyEnabled false
proguardFiles getDefaultProguardFile('proguard-android.txt'), 'roguard-rules.pro'
}
debug {
debuggable true
}
}
}
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.android.support:appcompat-v7:25.3.0'
compile 'com.android.support.constraint:constraint-layout:1.0.2'
compile 'junit:junit:4.12'
compile 'com.google.zxing:core:3.2.1'
compile 'com.journeyapps:zxing-android-embedded:3.2.0#aar'
Activity
import android.app.Activity;
import android.content.Intent;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.Toast;
import com.google.zxing.integration.android.IntentIntegrator;
import com.google.zxing.integration.android.IntentResult;
public class readerActivity extends AppCompatActivity {
// initialise local variables
private Button scan_btn;
private Button gen_Page;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_reader);
// casting button variable to a button on the screen
scan_btn = (Button) findViewById(R.id.scan_btn);
gen_Page = (Button) findViewById(R.id.next_btn);
final Activity activity = this;
// add onClickListener to the button so that it has an action when pressed; in this case, prompting
// and initialising the scanning of the QR code
scan_btn.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
IntentIntegrator integrator = new IntentIntegrator(activity);
integrator.setDesiredBarcodeFormats(IntentIntegrator.QR_CODE_TYPES);
integrator.setPrompt("Scan");
integrator.setCameraId(0);
integrator.setBeepEnabled(false);
integrator.setBarcodeImageEnabled(false);
integrator.initiateScan();
}
});
//onClickListener to move from one activity to another
gen_Page.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
Intent i = new Intent(activity, generatorActivity.class);
startActivity(i);
}
});
}
// method which collects the data from the barcode and produces a toast to show the user the code information
// else it informs the user that the scan was cancelled
#Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
IntentResult result = IntentIntegrator.parseActivityResult(requestCode, resultCode, data);
if(result != null){
if(result.getContents() == null){
Toast.makeText(this, "You have cancelled the scanning...", Toast.LENGTH_LONG).show();
}else{
Toast.makeText(this, result.getContents(), Toast.LENGTH_LONG).show();
}
}else {
super.onActivityResult(requestCode, resultCode, data);
}
}
Related
This question already has answers here:
Android Kotlin: Getting a FileNotFoundException with filename chosen from file picker?
(5 answers)
Can't get file uri from intent onActivityResult
(1 answer)
Closed 1 year ago.
I am writing an app which calculates the horizontal DPI of an image the user inputs. I am using the Sanselan library in Java's Common Imaging library. However, when I use the File object that is constructed from the path that is retrieved from a URI in an onActivityResult listener, passing it in as the parameter to a function that computes the horizontal DPI returns a FileNotFoundException:
onActivityResult error: java.io.FileNotFoundException:
/document/image:53066 (No such file or directory)
Below is my code:
build.gradle (App):
apply plugin: 'com.android.application'
android {
compileSdkVersion 29
buildToolsVersion "29.0.2"
defaultConfig {
applicationId "com.example.changingimageviewwidth"
minSdkVersion 26
targetSdkVersion 29
versionCode 1
versionName "1.0"
testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
}
buildTypes {
release {
minifyEnabled false
proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
}
}
}
dependencies {
implementation fileTree(dir: 'libs', include: ['*.jar'])
implementation 'androidx.appcompat:appcompat:1.3.0'
implementation 'androidx.constraintlayout:constraintlayout:2.0.4'
testImplementation 'junit:junit:4.12'
androidTestImplementation 'androidx.test.ext:junit:1.1.2'
androidTestImplementation 'androidx.test.espresso:espresso-core:3.3.0'
implementation "org.apache.sanselan:sanselan:0.97-incubator"
}
activity_main.xml:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#ffffff"
android:orientation="vertical">
<Button
android:id="#+id/button"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="Button"
android:onClick="analyzePhoto"/>
</LinearLayout>
MainActivity.java:
package com.example.changingimageviewwidth;
import androidx.appcompat.app.AppCompatActivity;
import android.content.Intent;
import android.net.Uri;
import android.os.Bundle;
import android.view.View;
import org.apache.sanselan.ImageInfo;
import org.apache.sanselan.Sanselan;
import java.io.File;
public class MainActivity extends AppCompatActivity {
// Request code used when reading in a file
private Integer READ_IN_FILE = 0;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
}
public void analyzePhoto(View v) {
// Specify that only photos are allowed as inputs (.jpg, .png).
Intent photoInputSpecs = new Intent(Intent.ACTION_GET_CONTENT);
photoInputSpecs.setType("image/*");
Intent photoInputHandler = Intent.createChooser(photoInputSpecs, "Choose a file");
startActivityForResult(photoInputHandler, 0);
}
// Processes the results of Activities.
#Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
try {
// Processes the photos that the user selected
if (requestCode == READ_IN_FILE) {
System.out.println("Let us process the photos that the user selected.");
// Retrieve the photo's location
Uri photoUri = data.getData();
String photoPath = photoUri.getPath();
File photoFile = new File(photoPath);
ImageInfo image1Info = Sanselan.getImageInfo(photoFile);
int image1HorizontalDPI = image1Info.getPhysicalWidthDpi();
int image1VerticalDPI = image1Info.getPhysicalHeightDpi();
System.out.println("[image1HorizontalDPI] = " + image1HorizontalDPI);
System.out.println("[image1VerticalDPI] = " + image1VerticalDPI);
}
}
catch (Exception ex) {
System.out.println("onActivityResult error: " + ex.toString());
}
}
}
I am trying to create an Android program, and met an error of which I have no idea how to solve.
My app crashes after I put in the email. I suspect that the problem is related with firebase. I have tried different ways of solving of this problem, such as changing the versions of firebase implementations, but without any success.
Here is my code
MainActivity.java
package com.chat.mychatapp;
import androidx.annotation.Nullable;
import androidx.appcompat.app.AppCompatActivity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.EditText;
import android.widget.ListView;
import android.widget.RelativeLayout;
import android.widget.TextView;
import com.firebase.ui.auth.AuthUI;
import com.firebase.ui.database.FirebaseListAdapter;
import com.github.library.bubbleview.BubbleTextView;
import com.google.android.material.floatingactionbutton.FloatingActionButton;
import com.google.android.material.snackbar.Snackbar;
import com.google.firebase.auth.FirebaseAuth;
import com.google.firebase.database.FirebaseDatabase;
import android.text.format.DateFormat;
import java.util.Objects;
public class MainActivity extends AppCompatActivity {
public static int SIGN_IN_CODE = 1;
private RelativeLayout activity_main;
private FirebaseListAdapter<Message> adapter;
private FloatingActionButton sendBtn;
#Override
protected void onActivityResult(int requestCode, int resultCode, #Nullable Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if(requestCode == SIGN_IN_CODE){
if(resultCode == RESULT_OK){
Snackbar.make(activity_main, "You are authorized", Snackbar.LENGTH_LONG).show();
displayAllMessages();
}else{
Snackbar.make(activity_main, "You are NOT authorized", Snackbar.LENGTH_LONG).show();
finish();
}
}
}
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
activity_main = findViewById(R.id.activity_main);
sendBtn = findViewById(R.id.sendBtn);
sendBtn.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
EditText textField = findViewById(R.id.messageField);
if(textField.getText().toString().equals(""))
return;
FirebaseDatabase.getInstance().getReference().push().setValue(
new Message(Objects.requireNonNull(FirebaseAuth.getInstance().getCurrentUser()).getEmail(),
textField.getText().toString()
)
);
textField.setText("");
}
});
//User not autorized
if(FirebaseAuth.getInstance().getCurrentUser() == null){
startActivityForResult(AuthUI.getInstance().createSignInIntentBuilder().build(), SIGN_IN_CODE);
}else{
Snackbar.make(activity_main, "You are authorized", Snackbar.LENGTH_LONG).show();
displayAllMessages();
}
}
private void displayAllMessages() {
ListView listOfMessages = findViewById(R.id.messageList);
adapter = new FirebaseListAdapter<Message>(this, Message.class, R.layout.list_item, FirebaseDatabase.getInstance().getReference()) {
#Override
protected void populateView(View v, Message model, int position) {
TextView m_user, m_time;
BubbleTextView m_text;
m_user = v.findViewById(R.id.messageUser);
m_time = v.findViewById(R.id.messageTime);
m_text = v.findViewById(R.id.messageText);
m_user.setText(model.getUserName());
m_text.setText(model.getMessage());
m_time.setText(DateFormat.format("dd-mm-yyyy HH:mm:ss",model.getTime()));
}
};
listOfMessages.setAdapter(adapter);
}
}
build.gradle
apply plugin: 'com.android.application'
android {
compileSdkVersion 29
buildToolsVersion "29.0.2"
defaultConfig {
applicationId "com.chat.mychatapp"
minSdkVersion 19
targetSdkVersion 29
versionCode 1
versionName "1.0"
testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
}
buildTypes {
release {
minifyEnabled false
proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
}
}
}
dependencies {
implementation fileTree(dir: 'libs', include: ['*.jar'])
implementation 'androidx.appcompat:appcompat:1.1.0'
implementation 'androidx.constraintlayout:constraintlayout:1.1.3'
testImplementation 'junit:junit:4.12'
androidTestImplementation 'androidx.test.ext:junit:1.1.1'
androidTestImplementation 'androidx.test.espresso:espresso-core:3.2.0'
implementation 'com.google.firebase:firebase-analytics:17.2.1'
implementation 'com.google.android.material:material:1.0.0'
implementation 'androidx.legacy:legacy-support-v4:1.0.0'
implementation 'com.google.android.gms:play-services-auth:17.0.0'
implementation 'com.google.firebase:firebase-auth:19.2.0'
implementation 'com.google.firebase:firebase-database:19.2.0'
implementation 'com.firebaseui:firebase-ui:0.6.2'
implementation 'com.github.lguipeng:BubbleView:1.0.1'
//implementation 'com.google.firebase:firebase-firestore:21.3.1'
}
apply plugin: 'com.google.gms.google-services'
Error
E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.chat.mychatapp, PID: 18455
java.lang.NoSuchMethodError: No virtual method fetchProvidersForEmail(Ljava/lang/String;)Lcom/google/android/gms/tasks/Task; in class Lcom/google/firebase/auth/FirebaseAuth; or its super classes (declaration of 'com.google.firebase.auth.FirebaseAuth' appears in /data/app/com.chat.mychatapp-s_3u6mmiv0A6KE9ijznfqQ==/base.apk)
at com.firebase.ui.auth.ui.AcquireEmailHelper.checkAccountExists(AcquireEmailHelper.java:55)
at com.firebase.ui.auth.ui.email.SignInNoPasswordActivity.onClick(SignInNoPasswordActivity.java:73)
at android.view.View.performClick(View.java:7339)
at android.widget.TextView.performClick(TextView.java:14222)
at android.view.View.performClickInternal(View.java:7305)
at android.view.View.access$3200(View.java:846)
at android.view.View$PerformClick.run(View.java:27787)
at android.os.Handler.handleCallback(Handler.java:873)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:214)
at android.app.ActivityThread.main(ActivityThread.java:7078)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:493)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:964)
Update the following dependency:
implementation 'com.firebaseui:firebase-ui:0.6.2'
into this:
implementation 'com.firebaseui:firebase-ui:6.2.0'
https://github.com/firebase/FirebaseUI-Android
From the docs:
Removed the deprecated fetchProvidersForEmail(String) method from the FirebaseAuth class, as well as the associated ProviderQueryResult class. Use fetchSignInMethodsForEmail(String) instead.
Therefore update the firebaseUI and you can use fetchSignInMethodsForEmail(String) instead.
I am struggling with an error since two day. Hope someone can help me.
I am using AndroidStudio 3.3.1 on MacOS. When I build the project, i receiver the following error message:
Error: Program type already present: com.loopj.android.http.BaseJsonHttpResponseHandler
My build.gradle looks like:
apply plugin: 'com.android.application'
compileSdkVersion 28
buildToolsVersion "28.0.3"
defaultConfig {
applicationId "lalalalalalala"
minSdkVersion 19
targetSdkVersion 28
versionCode 7
versionName "1.6"
testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
}
buildTypes {
release {
minifyEnabled false
shrinkResources false
proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
signingConfig signingConfigs.config
}
}
productFlavors {
}
}
dependencies {
implementation fileTree(include: ['*.jar'], dir: 'libs')
implementation 'com.android.support:design:28.1.0'
testImplementation 'junit:junit:4.12'
implementation 'com.loopj.android:android-async-http:1.4.9'
implementation 'com.github.delight-im:Android-AdvancedWebView:v3.0.0'
implementation 'com.google.firebase:firebase-messaging:17.4.0'
implementation 'com.google.firebase:firebase-core:16.0.7'
}
apply plugin: 'com.google.gms.google-services'
as dependencies I have
dependencies {
classpath 'com.android.tools.build:gradle:3.3.1'
classpath 'com.google.gms:google-services:4.2.0'
}
in gradle.properties is
org.gradle.jvmargs=-Xmx1536m
android.useAndroidX=true
android.enableJetifier=true
and in in gradle-wrapper.properties I have
distributionUrl=https\://services.gradle.org/distributions/gradle-4.10.1-all.zip
I start to believe is a bug of AndroidStudio 3.3.1.
Does anyone see a problem in my code ?
Any help is highly appreciated :)
edit:
package lalalalalala;
import android.annotation.SuppressLint;
import android.app.Activity;
import android.content.Context;
import android.content.Intent;
import android.graphics.Bitmap;
import android.os.Bundle;
import android.webkit.WebViewClient;
import com.loopj.android.http.*;
import im.delight.android.webview.AdvancedWebView;
public class MainActivity extends Activity implements AdvancedWebView.Listener {
private AdvancedWebView WebView;
protected static boolean isActivityRunning;
public static boolean checkIfAppIsRunnung()
{
return isActivityRunning;
}
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
//Cookies
AsyncHttpClient myClient = new AsyncHttpClient();
PersistentCookieStore myCookieStore = new PersistentCookieStore(this);
myClient.setCookieStore(myCookieStore);
setContentView(R.layout.activity_main);
WebView = (AdvancedWebView) findViewById(R.id.webWiew);
WebView.setListener(this, this);
WebView.setThirdPartyCookiesEnabled(false);
Intent mIntent = new Intent(this, MyFirebaseMessagingService.class);
startService(mIntent);
WebView.loadUrl("lalalalalalala");
WebView.setWebViewClient(new WebViewClient());
}
#Override
protected void onActivityResult(int requestCode, int resultCode, Intent intent) {
super.onActivityResult(requestCode, resultCode, intent);
WebView.onActivityResult(requestCode, resultCode, intent);
// ...
}
#Override
public void onPageStarted(String url, Bitmap favicon) { }
#Override
public void onPageFinished(String url) { }
#Override
public void onDownloadRequested(String url, String suggestedFilename, String mimeType, long contentLength, String contentDisposition, String userAgent) { }
#Override
public void onExternalPageRequest(String url) { }
}
I have the following problem when I run the 'app' (Android studio emulator):
Error:Execution failed for task ':app:javaPreCompileDebug'.
> Annotation processors must be explicitly declared now. The following dependencies on the compile classpath are found to contain annotation processor. Please add them to the annotationProcessor configuration.
- butterknife-7.0.1.jar (com.jakewharton:butterknife:7.0.1)
Alternatively, set android.defaultConfig.javaCompileOptions.annotationProcessorOptions.includeCompileClasspath = true to continue with previous behavior. Note that this option is deprecated and will be removed in the future.
See https://developer.android.com/r/tools/annotation-processor-error-message.html for more details.
My Graddle-App Level:
apply plugin: 'com.android.application'
android {
compileSdkVersion 25
buildToolsVersion '26.0.2'
defaultConfig {
applicationId "com.hhhhh.android"
minSdkVersion 15
targetSdkVersion 25
versionCode 1
versionName "1.0"
}
buildTypes {
release {
minifyEnabled false
proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
}
}
}
dependencies {
implementation 'com.google.firebase:firebase-database:11.0.4'
implementation 'com.google.firebase:firebase-auth:11.0.4'
compile fileTree(include: ['*.jar'], dir: 'libs')
compile 'com.android.support:appcompat-v7:25.2.0'
compile 'com.android.support:design:25.0.1'
compile 'com.jakewharton:butterknife:7.0.1'
}
apply plugin: 'com.google.gms.google-services'
The error disappears when I switch to the version:
compile 'com.jakewharton:butterknife:8.7.0'
But it generates more problems in my LogginActivity:
package com.sourcey.materiallogindemo;
import android.app.ProgressDialog;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.util.Log;
import android.content.Intent;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
import android.widget.Toast;
import butterknife.ButterKnife;
import butterknife.Bind;
public class LoginActivity extends AppCompatActivity {
private static final String TAG = "LoginActivity";
private static final int REQUEST_SIGNUP = 0;
#Bind(R.id.input_email) EditText _emailText;
#Bind(R.id.input_password) EditText _passwordText;
#Bind(R.id.btn_login) Button _loginButton;
#Bind(R.id.link_signup) TextView _signupLink;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_login);
ButterKnife.bind(this);
_loginButton.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
login();
}
});
_signupLink.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
// Start the Signup activity
Intent intent = new Intent(getApplicationContext(), SignupActivity.class);
startActivityForResult(intent, REQUEST_SIGNUP);
finish();
overridePendingTransition(R.anim.push_left_in, R.anim.push_left_out);
}
});
}
public void login() {
Log.d(TAG, "Login");
if (!validate()) {
onLoginFailed();
return;
}
_loginButton.setEnabled(false);
final ProgressDialog progressDialog = new ProgressDialog(LoginActivity.this,
R.style.AppTheme_Dark_Dialog);
progressDialog.setIndeterminate(true);
progressDialog.setMessage("Authenticating...");
progressDialog.show();
String email = _emailText.getText().toString();
String password = _passwordText.getText().toString();
// TODO: Implement your own authentication logic here.
new android.os.Handler().postDelayed(
new Runnable() {
public void run() {
// On complete call either onLoginSuccess or onLoginFailed
onLoginSuccess();
// onLoginFailed();
progressDialog.dismiss();
}
}, 3000);
}
#Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
if (requestCode == REQUEST_SIGNUP) {
if (resultCode == RESULT_OK) {
// TODO: Implement successful signup logic here
// By default we just finish the Activity and log them in automatically
this.finish();
}
}
}
#Override
public void onBackPressed() {
// Disable going back to the MainActivity
moveTaskToBack(true);
}
public void onLoginSuccess() {
_loginButton.setEnabled(true);
finish();
}
public void onLoginFailed() {
Toast.makeText(getBaseContext(), "Login failed", Toast.LENGTH_LONG).show();
_loginButton.setEnabled(true);
}
public boolean validate() {
boolean valid = true;
String email = _emailText.getText().toString();
String password = _passwordText.getText().toString();
if (email.isEmpty() || !android.util.Patterns.EMAIL_ADDRESS.matcher(email).matches()) {
_emailText.setError("enter a valid email address");
valid = false;
} else {
_emailText.setError(null);
}
if (password.isEmpty() || password.length() < 4 || password.length() > 10) {
_passwordText.setError("between 4 and 10 alphanumeric characters");
valid = false;
} else {
_passwordText.setError(null);
}
return valid;
}
}
With 8.7.0:
Annotation processors must be explicitly declared now
Do what it says
Add the second line
compile 'com.jakewharton:butterknife:8.7.0'
annotationProcessor 'com.jakewharton:butterknife-compiler:8.7.0'
With 8.7.0 ... it generates more problems in my LogginActivity:
You are importing the wrong class...
Annotate fields with #BindView
That changed at Version 8.0
See the website for usage and the latest version. http://jakewharton.github.io/butterknife/
import butterknife.BindView;
..
#BindView(R.id...)
you can solve this issue by simply adding this to your app level gradle file
android{
....
defaultConfig{
....
javaCompileOptions {
annotationProcessorOptions {
includeCompileClasspath true
}
}
}
Hope its worked
Just add this line:
annotationProcessor 'com.jakewharton:butterknife-compiler:7.0.1'
in your dependencies like:
dependencies {
//...
compile 'com.jakewharton:butterknife:7.0.1'
annotationProcessor 'com.jakewharton:butterknife-compiler:7.0.1'
}
Check this out for more details.
You can try :
// butter knife
compile 'com.jakewharton:butterknife:8.8.1'
annotationProcessor 'com.jakewharton:butterknife-compiler:8.8.1'
Otherwise you can try
https://github.com/avast/android-butterknife-zelezny
to auto gencode from butterknife.
I hope it can help your problem!
try this ,you need to add the annotation along with ButterKnife library..
Butterknife library
compile 'com.jakewharton:butterknife:8.8.1'
annotation for butterknife
annotationProcessor 'com.jakewharton:butterknife-compiler:8.8.1'
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'
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 :)