[英]Get the ID of selected item in listview
我正在制作一个审查应用程序,我正在尝试显示来自 firebase 的所有子数据。 我的 firebase 中的一个片段是: https ://i.stack.imgur.com/YrmNO.png 我可以在列表视图中获取我想要的数据,但是我如何找出按下的内容以便我可以将数据发送到新的活动 ? 例如,单击 Bluemoon 并可以在新活动中从数据库中获取该数据?
DatabaseReference Reference = FirebaseDatabase.getInstance().getReference().child("Beers");
//DatabaseReference zone1Ref = Reference.child(beerCode);
listView =(ListView)findViewById(R.id.allBeersList);
final ArrayAdapter<String> arrayAdapter = new ArrayAdapter<String>(this,android.R.layout.simple_list_item_1,mAllBeers);
listView.setAdapter(arrayAdapter);
arrayAdapter.clear();
Reference.addValueEventListener(new ValueEventListener() {
@Override
public void onDataChange(@NonNull DataSnapshot dataSnapshot) {
//arrayAdapter.clear();
for(DataSnapshot snapshot : dataSnapshot.getChildren()){
//arrayAdapter.add(snapshot.getValue().toString());
Beers beers = snapshot.getValue(Beers.class);
String beerClass = beers.getmBrewery() + " " + beers.getmName();
arrayAdapter.add(beerClass);
}
arrayAdapter.notifyDataSetChanged();
}
@Override
public void onCancelled(@NonNull DatabaseError databaseError) {
}
});
listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> adapterView, View view, int position, long l) {
//Toast.makeText(allBeers.this,"Test",Toast.LENGTH_SHORT).show();
//Intent intent = new Intent(allBeers.this,beerInformation.class);
//startActivity(intent);
//Toast.makeText(allBeers.this,beerCode + "",Toast.LENGTH_SHORT).show();
}
});```
listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> adapterView, View view, int position, long l) {
// ListView Clicked item index
int itemPosition = position;
// ListView Clicked item value
String itemValue = (String) listView.getItemAtPosition(position);
// Show Toast
Toast.makeText(getApplicationContext(),
"Position:"+itemPosition+" Item Clicked: " +itemValue , Toast.LENGTH_LONG)
.show();
//Instead of showing a toast here you can pass "itemValue" to another activity as intent
}
});
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