android - 从 fragment 中的搜索 View 小部件获取文本

Question

我正在开发一个具有抽屉导航、MainActivity 和六个 fragment 的 Android 应用程序。每个抽屉导航项目打开一个不同的 fragment 。在 MainActivity 上，我包含了一个搜索 View 小部件以将其用作搜索框:

主要 Activity :

 @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        getMenuInflater().inflate(R.menu.menu, menu);
        // Retrieve the SearchView and plug it into SearchManager
        final SearchView searchView = (SearchView) MenuItemCompat.getActionView(menu.findItem(R.id.action_search));
        SearchManager searchManager = (SearchManager) getSystemService(SEARCH_SERVICE);
        searchView.setSearchableInfo(searchManager.getSearchableInfo(getComponentName()));

        return true;
    }

菜单.xml

<menu xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    tools:context=".HomeActivity">

    <item
        android:id="@+id/action_search"
        android:icon="@android:drawable/ic_menu_search"
        android:title="Search"
        app:actionViewClass="android.support.v7.widget.SearchView"
        app:showAsAction="always" />

</menu>

主页 fragment

  public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setHasOptionsMenu(true);

    }

    @Override
    public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
        // Do something that differs the Activity's menu here
        super.onCreateOptionsMenu(menu, inflater);
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        switch (item.getItemId()) {

            case R.id.action_search:

                Log.d("SEARCH", "pulsado search" );
                return false;


            default:
                break;
        }

        return false;
    }

它现在可以工作了，我的意思是，当单击搜索图标时，会显示一个编辑文本。我怎样才能让插入到这个 edittext 中的文本与它一起工作？

Answer 1

我想你在看下面的一段代码

searchView.setOnQueryTextListener(new SearchView.OnQueryTextListener() {
        @Override
        public boolean onQueryTextSubmit(String query) {
            return false;
        }

        @Override
        public boolean onQueryTextChange(String newText) {
            return false;
        }
    });

最佳方法。

Please use interfacing mechanism for the fragments.Based on current fragment shown to user call callback method to notify fragment that search text changed. sample link

简单方法。

Provide one public method all the fragments.Based on current fragment shown to user call method to notify fragment that search text changed.

最糟糕的方法。

use "getActivity" inside all the fragments then "findViewById", and use "setOnQueryTextListener". Make sure your having proper reference.