Question

我有一个editText和listview可以正常工作。但是我希望在用户开始输入之前使listview不可见。我查看了这些链接，但它没有用

这是我的代码

  public class MapAcWithMarker extends FragmentActivity implements OnMapReadyCallback {

public ListView listView;
private View parentView;
public DataAdapter adapter;
ArrayList<Locations> arrayListTemp=new ArrayList<>();
EditText inputSearch;
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main_recyc);
    // Obtain the SupportMapFragment and get notified when the map is ready to be used.
    SupportMapFragment mapFragment = (SupportMapFragment) getSupportFragmentManager()
            .findFragmentById(R.id.map);
    mapFragment.getMapAsync(this);

    inputSearch = (EditText) findViewById(R.id.inputSearch);
    listView = (ListView) findViewById(R.id.listView);

    inputSearch.addTextChangedListener(new TextWatcher() {

        @Override
        public void onTextChanged(CharSequence cs, int arg1, int arg2, int arg3) {


            }
        }

        @Override
        public void beforeTextChanged(CharSequence arg0, int arg1, int arg2,
                                      int arg3) {
            if(listView.getVisibility() != View.INVISIBLE)
                listView.setVisibility(View.INVISIBLE);


        }



        @Override
        public void afterTextChanged(Editable arg0) {
           if(listView.getVisibility() != listView.VISIBLE)
               listView.setVisibility(listView.VISIBLE);

        }
    });

Answer 1

您可以在onCreate中隐藏ListView，而不是隐藏在beforeTextChanged和onTextChanged或afterTextChanged中，您可以取消隐藏它。

Answer 2

尝试使用

listView.setVisibility(View.GONE);

而不是

 listView.setVisibility(View.INVISIBLE);

Answer 3

1。首先hide来自{luout ListView或XML方法的onCreate()。

2。从ListView方法显示onTextChanged()，因为当用户输入内容时会调用此方法。

试试这个：

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    ...........
    ..................

    inputSearch = (EditText) findViewById(R.id.inputSearch);
    listView = (ListView) findViewById(R.id.listView);

    // First hide ListView
    listView.setVisibility(View.INVISIBLE);

    inputSearch.addTextChangedListener(new TextWatcher() {

        @Override
        public void onTextChanged(CharSequence cs, int arg1, int arg2, int arg3) {
           // Show ListView
           if(listView.getVisibility() != View.VISIBLE)
               listView.setVisibility(View.VISIBLE);
        }

        @Override
        public void beforeTextChanged(CharSequence arg0, int arg1, int arg2, int arg3) {

        }

        @Override
        public void afterTextChanged(Editable arg0) {

        }
    });
}

android-我无法隐藏listview berfore在editText中输入

3 个答案: