How to Retrieve Data From Firebase Database in Android | Android Firebase Part 4

Hi sir, i enter almost same code but addValueEventListener is not firing. i share my code here

FirebaseDatabase database = FirebaseDatabase.getInstance();
DatabaseReference referenceArea = database.getReference("Area");
referenceArea.addValueEventListener(new ValueEventListener() {
@Override
public void onDataChange(@NonNull DataSnapshot dataSnapshot) {
for (DataSnapshot snapshot : dataSnapshot.getChildren()) {
AreaInfo info = snapshot.getValue(AreaInfo.class);
String Area_Code = info.getAR_CODE();
String Area_Name = info.getArea_Name();

AreaExist = dbMain.hasObjectArea(Integer.parseInt(Area_Code));
if (AreaExist == false && !Area_Name.trim().equals("")) {
dbMain.addArea(Integer.parseInt(Area_Code), Area_Name);
}
}
}

@Override
public void onCancelled(@NonNull DatabaseError databaseError) {

}
});

Retrieve data wala button kab add kiya home screen pe??

What if i want to retrieve data of a particular student?

why its keep on crashing? didn't show the data on list view and afterwards it crash.

hello sir can u show me ur activity main activity java.
i have built some intent but the code cant run.

help me cause i need to teach my student.tq sir

Thank you so much, it was helped me a lot

inserting data suceessfull. But Data not retrievinng

Please help sir

Dude you are perfect but actually I am not able to show the data

I have a problem with my apps, but a follow all of your tutorial. But my apps keep crashing when i try to retrieve data from firebase.. but the data has been uploaded to firebase. But its crash when you go to retrieve activity. Please help me sir

sir how can l retrieve data to a fragment layout

you never showed to make the button that gets the information

Good day, sir, I have a problem retrieving the data, can you help me out? the list view is displayed but the data from database did not appear

what is your OS?

where is source code

hi ...how can i display it in textview? please help me

AOA
Sir please make a video how to retrieve data from two nodes or table from firebase android

Hello Please help me! i have an error datasnapshot. i have been follow your coding but the app crash

help me sir plz

sir i found error

Working Thank you!!!

oh brother, i was wondering for 2 days to find bug in my app. you just help me. cant explain how much glad i am.

how can get retrieve button and how will do click the retrieve button and get those data? you don't show it in your video. please can you explain it?I'm in trouble in that

Hi ! I done Exactly what you done . But Page is Empty no errors ?

Sir button retrieve data pa set on click listener nhi lagaya

how to retrive data for speacific user in EditTextView

Hi sir! How to retrieve video + thumbnail from real time database in android studio?

Not being able to view data....and activity gets closed after few seconds.

Error: skipped 11 frames. To much work done in main thread

Plz help with this

Flow of explaining is excellent 🔥 thank you for sharing your knowledge 😁

When I retrieve data my activity exit ,there is no error shown in error logs too. What is the problem

Thank you for this , how can we retrieve firebase data in table layout or tableview ?

How can create Retrive button

Hii... I want to add Buttons and Textview togather in a childnode called user_id
Example:

Myproject3665
|
Users
|
user_id_1 (edittext)
| |
| Status:"comment" ( Textwiew)
| Status:"comment" ( Textwiew)
| Value:"0" Or "1" (Button)
| Value:"0" Or "1" (Button)
user_id_2 (edittext)
| |
| Status:"comment" ( Textwiew)
| Status:"comment" ( Textwiew)
| Value:"0" Or "1" (Button)
| Value:"0" Or "1" (Button)
Am unable to create this pattern in my android app with button and text view..i want to read and write my data in real-time database..... help me

nice

thank you very much for sharing your knowledge,

Exellent tutorial but where is the part where you create the Retrieve button. So the main activity can use the setOnclickLister and how to call the function.
Thanks for the tut.

Sir I have error in dataSnapshot ...pls help

I'm pretty confused about what exactly a snapshot is and can't find a clear answer. Does it contain all the data of an element and its children? I'm building an Android app and wondering, if I took a snapshot of a parent that was small in size but had 10,000 children, would it download the ALL of that data to the user's phone, even though most of it will be irrelevant? Thank you.

Hellow Sir it will not show my data to me I code line by line as you

Pls Help

Error = java.lang.NullPointerException: Attempt to invoke virtual method 'java.lang.String android.content.Context.getPackageName()' on a null object reference

Code = public class RetreiveListAdapter extends ArrayAdapter {

private Activity mContext;
List<Info> infoList;

public RetreiveListAdapter(Activity mContext, List<Info> infoList) {
super(mContext, R.layout.activity_list_view_info, infoList);
this.mContext = mContext;
this.infoList = infoList;

}

@NonNull
@Override
public View getView(int position, @Nullable View convertView, @NonNull ViewGroup parent) {

LayoutInflater inflater = mContext.getLayoutInflater();
View listItemView = inflater.inflate(R.layout.activity_list_view_info, null, true);

TextView textView1 = listItemView.findViewById(R.id.textView1);
TextView textView2 = listItemView.findViewById(R.id.textView2);
TextView imageView = listItemView.findViewById(R.id.imageView);

Info info = infoList.get(position);

textView1.setText(info.getTitle());
textView2.setText(info.getDescription());
imageView.setText(info.getImage());

return listItemView;
}
}

I’m not getting the .getName ? it’s not suggesting, where did the .getName come from?

Can you help me please i have everything same what you have done in video, but my data is not visible , and i am not getting the error also please help me

I followed all instructions given here still facing issue...my app is getting close

Thank you very much. Your video really help me to solve my app problem :). Keep on doing the tutorial.