我已经创建了这个数据库,在此处输入图像描述,并希望显示专门针对儿童可用性的列表:“可用”项目。通过这段代码,我几乎达到了目标
public class Homeuser extends AppCompatActivity {
SharedPreferences preferences;
SharedPreferences.Editor editor;
ListView lv;
FirebaseListAdapter adapter;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_homeuser);
final Vibrator vibeuser = (Vibrator) Homeuser.this.getSystemService(Context.VIBRATOR_SERVICE);
preferences = PreferenceManager.getDefaultSharedPreferences(this);
editor = preferences.edit();
Query query = FirebaseDatabase.getInstance().getReference().child("food");
lv = findViewById(R.id.list_item);
FirebaseListOptions<food> options = new FirebaseListOptions.Builder<food>()
.setLayout(R.layout.list_items).setLifecycleOwner(Homeuser.this)
.setQuery(query,food.class).build();
adapter = new FirebaseListAdapter(options)
{
@Override
protected void populateView(View v, Object model, int position) {
TextView itemname, itemprice, avail;
itemname = v.findViewById(R.id.itemname);
itemprice = v.findViewById(R.id.itemprice);
avail = v.findViewById(R.id.avail);
food itemFood = (food) model;
if(itemFood.getAvailability().toString().equals("Available")){
itemname.setText(itemFood.getFooditemname().toString());
itemprice.setText(itemFood.getFooditemprice().toString());
avail.setText(itemFood.getAvailability().toString());}
}
};}}
但是面临这样的问题:
在此处输入图片描述如何摆脱这个?谢谢。
慕标琳琳
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