KnowledgeHub
Questions
Tags
Users
Search
Alex Rivera
|
Logout
Edit Question
Title
Body
I'm trying to use the Java API to read data from a Firebase database in an Android application in the onCreate() event. In other words, I'm trying to do the simplest read possible, the equivalent of ... ref.once('value', function(snapshot) { }); ...in the Javascript API. I'm trying to use the addEventListenerForSingleValueEvent() method, but it seems to want me to override the onDataChange() method, which is not what I want. I want to get the data out when the program execution reaches this line, regardless of database events. Here's my (unfinished) function.... protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.poll_table); // First get the table layout tbl = (TableLayout) findViewById(R.id.pollsTable); // Now let's create the header TableRow tHead = createPollsTableHeader(); // Add header to tableLayout tbl.addView(tHead, new TableLayout.LayoutParams( LayoutParams.MATCH_PARENT, LayoutParams.WRAP_CONTENT)); // Add all polls in ref as rows polls.addListenerForSingleValueEvent(new ValueEventListener() { // DON'T KNOW WHAT TO DO HERE } } I don't even think this is the correct method. I just want to be able to get a Datasnapshot that I can iterate through and get data out of, like... for (Datasnapshot child : datasnapshot) { } ..just as if I were using the ref.once('value', function(snapshot) event in the Javaxcript API.
Tags (comma-separated)
Save Edits
Cancel