Question

public class SearchRecipe extends AppCompatActivity {

 ArrayList<Recipe> lst=new ArrayList<Recipe>();
    private ListView listView;
    ProgressDialog pg;


 @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_search_recipe);
        pg = ProgressDialog.show(this, "Loading", "please wait", true);
        getDataBase3();
    }

    public void getDataBase3() {
        myFirebaseRef.child("Recipes").addListenerForSingleValueEvent(new ValueEventListener() {
            @Override
            public void onDataChange(DataSnapshot dataSnapshot) {
                for (DataSnapshot snapshot : dataSnapshot.getChildren()) {
                    Recipe recipe = snapshot.getValue(Recipe.class);
                    lst.add(recipe);
                }
                init();
            }
            @Override
            public void onCancelled(FirebaseError firebaseError) {
                Toast.makeText(SearchRecipe.this, "Failed", Toast.LENGTH_SHORT).show();
            }

        });
    }

    private void init() {
        listView= (ListView) findViewById(R.id.listview_searchRecipe);
        UsersAdapter adapter = new UsersAdapter(this, lst);
        listView.setAdapter(adapter);
        listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
            @Override
            public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
                Intent intent=new Intent(SearchRecipe.this,ShowRecipe.class);
                intent.putExtra("recipeName",lst.get(position).getRecipeName());
                startActivity(intent);
                finish();
            }
        });
        pg.dismiss();
    }

    public class UsersAdapter extends ArrayAdapter<Recipe> {
        public UsersAdapter(android.content.Context context, ArrayList<Recipe> names) {
            super(context, 0, names);
        }
        @Override
        public View getView(int position, View convertView, ViewGroup parent) {
            Recipe user = getItem(position);
            if (convertView == null) {
                convertView = LayoutInflater.from(getContext()).inflate(R.layout.recipe_row_layout, parent, false);
                TextView tvname= (TextView) convertView.findViewById(R.id.recipeTV2_row);
                TextView tvlike= (TextView) convertView.findViewById(R.id.likes_row);
                TextView tvdislike= (TextView) convertView.findViewById(R.id.dislike_row);

                tvname.setText(user.getRecipeName());
                tvlike.setText(""+user.getLikes());
                tvdislike.setText(""+user.getDislikes());
            }
            return convertView;
        }

    }

填充lst作品 - 有价值和正确的。当列表到达位置8时，它开始替换ListView中的名称（如果列表中的数字8是“dog”，数字1是“cat”，它将显示数字8，数字1是“cat”，但是当你点击1时它会把它带到1，当你点击8时它会把你带到正确的8！）

所以问题在于ListView的呈现 - 它显示错误的值，当你点击它们时它会带你到正确的位置。

谢谢你们。

Answer 1

不推荐使用ListView，只需使用RecyclerView，它更轻松，更容易使用（如果你仍然遇到问题 - 然后发布）

Google的RecyclerView示例：https://developer.android.com/training/material/lists-cards.html

可搜索和可扩展的recycerview示例（在对话框容器中，这个想法是相同的）：https://github.com/WithoutCaps/DialogsCheatSheet

ListView适配器问题

1 个答案: