我看到了这段代码,但它在TextView中检索数据,但是我希望它在ListView中设置。
我怎么能这样做?
这是我试过的代码:
ref.addValueEventListener(new ValueEventListener() {
@Override
public void onDataChange(DataSnapshot snapshot) {
for (DataSnapshot postSnapshot : snapshot.getChildren()) {
//Getting the data from snapshot
Person person = postSnapshot.getValue(Person.class);
//Adding it to a string
String string = "Name: "+person.getName()+"\nAddress: "+person.getAddress()+"\n\n";
//Displaying it on textview
textViewPersons.setText(string);
}
}
@Override
public void onCancelled(FirebaseError firebaseError) {
System.out.println("The read failed: " + firebaseError.getMessage());
}
这是我的ListView代码:
messageList = (ListView) findViewById(R.id.messageList);
messages = new ArrayList<Message>();
mAdapter = new MyArrayAdapter(this, messages);
messageList.setAdapter((ListAdapter) mAdapter);
答案 0 :(得分:0)
您可以使用FirebaseUI for Android库。
只需添加依赖项(0.4.4适用于firebase 9.4.0库):
dependencies {
// Single target that includes all FirebaseUI libraries
compile 'com.firebaseui:firebase-ui:0.4.4'
}
然后将ListView与适配器连接(在本例中为人员列表):
ListView personsView = (ListView) findViewById(R.id.mylist);
DatabaseReference ref = FirebaseDatabase.getInstance().getReference();
mAdapter = new FirebaseListAdapter<Person>(this, Person.class, R.layout.myItemLayout, ref) {
@Override
protected void populateView(View view, Person person, int position) {
//Populate the item
}
};
personsView.setAdapter(mAdapter);
答案 1 :(得分:0)
首先,您需要修复对象类型。您的适配器(和后备ArrayList)具有Message对象,但Firebase为您提供了Person对象。
假设您使适配器获取Person对象,只需添加到适配器
ref.addValueEventListener(new ValueEventListener() {
@Override
public void onDataChange(DataSnapshot snapshot) {
for (DataSnapshot postSnapshot : snapshot.getChildren()) {
//Getting the data from snapshot
Person person = postSnapshot.getValue(Person.class);
mAdapter.add(person);