firebase

问题 I'm trying to map array to get image url from Firebase storage and list them to page. The code give me a url, but the problem is that code not set url to img variable on time and returning empty img variable. return( <div> <Header /> {this.state.loaded ? <Loading /> : null} <div> {this.state.productsArr.map((product, i) => { let img = ''; storageRef.child(`images/${product.images[0]}`) .getDownloadURL() .then((url) => { img = url console.log('then img', img) }) .catch((err) => console.log(err

问题 I have a Firebase snapshot listener that checks for new documents, adds them to an array (the collectionView datasource) and then reloads the collectionView. However, I'm getting duplicate cells in the collectionView. I currently have 3 objects in my Firebase Firestore collection but they get duplicated for a total of 9 cells. I even added a check for the index so reloadData only happens after it reaches the end of the array. Here's the relevant code: messageListener = query

问题 I'm developing an application that updates Firebase data in realtime to React. What I want to do is that a user updates the state in the app, at the same time it should be updated for another user. I have built it done but it continually renders renderStatus() and it's too slow. I want to make it updated once RDB data updated. class Status extends Component { constructor(props) { super(props); this.state = { to_status: false, from_status: false }; } // change the state in RDB handleSatus = ()

问题 I'm developing an application that updates Firebase data in realtime to React. What I want to do is that a user updates the state in the app, at the same time it should be updated for another user. I have built it done but it continually renders renderStatus() and it's too slow. I want to make it updated once RDB data updated. class Status extends Component { constructor(props) { super(props); this.state = { to_status: false, from_status: false }; } // change the state in RDB handleSatus = ()

问题 I'm developing an application that updates Firebase data in realtime to React. What I want to do is that a user updates the state in the app, at the same time it should be updated for another user. I have built it done but it continually renders renderStatus() and it's too slow. I want to make it updated once RDB data updated. class Status extends Component { constructor(props) { super(props); this.state = { to_status: false, from_status: false }; } // change the state in RDB handleSatus = ()

问题 I'm developing an application that updates Firebase data in realtime to React. What I want to do is that a user updates the state in the app, at the same time it should be updated for another user. I have built it done but it continually renders renderStatus() and it's too slow. I want to make it updated once RDB data updated. class Status extends Component { constructor(props) { super(props); this.state = { to_status: false, from_status: false }; } // change the state in RDB handleSatus = ()

问题 I'm trying to build a custom app into aosp build which uses Firebase database. I've included the firebase database( com.google.firebase.firebase_database ) along with all it's compile dependencies in Android.bp and build process is a success. However, when I launch the app, I always get this exception java.lang.IllegalStateException: Default FirebaseApp is not initialized in this process com.package.name. Make sure to call FirebaseApp.initializeApp(Context) first. I have tried calling it in

问题 I have implemented Firebase/Crashlytics to an app. I can see in the logs that app is sending crashes. Firebase Console doesn't show anything. I can see crash free user count decreased after the implementation. Console doesn't show up anything. Please help. My app ID: com.obssmobile.mychesspuzzlegame I have disconnected the Xcode debugger, relaunched the app and remade the crashes. Issue is persisting. Here I can see that crash free users started dropping. Here I can see "report submission

问题 While its in the Document Snapshot loop its adding the ratings to the ratingItemList. I know this for sure because I'm also printing the size of the list in the Log and it's increasing. But after it comes out of that loop just to be sure I check whether it is empty or not and it prints Empty List in the log. Can you guys help me out locating the error? package com.example.ratingapp; import androidx.appcompat.app.AppCompatActivity; import android.os.Bundle; import android.util.Log; import

问题 While its in the Document Snapshot loop its adding the ratings to the ratingItemList. I know this for sure because I'm also printing the size of the list in the Log and it's increasing. But after it comes out of that loop just to be sure I check whether it is empty or not and it prints Empty List in the log. Can you guys help me out locating the error? package com.example.ratingapp; import androidx.appcompat.app.AppCompatActivity; import android.os.Bundle; import android.util.Log; import