Question

我还是片段新手，我需要添加一个动态搜索框，以便在用户在编辑框中输入时过滤列表视图项。我尝试了开发人员文档https://developer.android.com/training/search/setup.html，但它只是将搜索小部件添加到操作栏，我想将搜索功能添加到编辑文本框中。我使用ListFragment来处理项目上的点击事件。

这是我的代码。

ActivityMain.java

@Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
    mToolbar = (Toolbar) findViewById(R.id.app_bar);
    setSupportActionBar(mToolbar);

    FragmentTransaction fragmentTransaction = getSupportFragmentManager().beginTransaction();
    fragmentTransaction.replace(R.id.main_container, new FragmentNamesList()).commit();

}

activity_main.xml中

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical">
<android.support.v7.widget.Toolbar
    android:id="@+id/app_bar"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:background="@color/colorPrimary"
    android:minHeight="?attr/actionBarSize"
    app:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar">

</android.support.v7.widget.Toolbar>

<LinearLayout
    android:id="@+id/main_container"
    android:orientation="vertical"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

</LinearLayout>

</LinearLayout>

FragmentNamesList.java

    @Nullable
    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        getActivity().getSupportFragmentManager().beginTransaction().replace(R.id.list_container, new FragmentNames()).commit();
        return inflater.inflate(R.layout.frag_names_list, container, false);

frag_names_list.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical" android:layout_width="match_parent"
    android:layout_height="match_parent">
<LinearLayout
    android:orientation="vertical"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_gravity="center_horizontal"
    android:layout_marginBottom="15dp">

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:textAppearance="?android:attr/textAppearanceLarge"
        android:text="Large Text"
        android:id="@+id/textView"
        android:layout_gravity="center_horizontal"
        android:layout_marginTop="25dp" />

    <EditText
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:id="@+id/et_search"
        android:layout_gravity="center_horizontal"
        android:layout_marginLeft="15dp"
        android:layout_marginRight="15dp"
        android:hint="Search" />
</LinearLayout>

<LinearLayout android:id="@+id/list_container"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:orientation="vertical"
    android:layout_marginLeft="15dp"
    android:layout_marginRight="15dp">

</LinearLayout>

</LinearLayout>

我在单独的布局中有列表视图

frag_list_test.xml

<?xml version="1.0" encoding="utf-8"?>
<ListView xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:id="@+id/list_test">

</ListView>

FragmentNames.java

public static String[] mValues = new String[]{"Item 1", "Item 2", "Item 3"};

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        View rootView = inflater.inflate(R.layout.frag_list_test, container, false);
ArrayAdapter<String> adapter = new ArrayAdapter<String>(getActivity(), android.R.layout.simple_list_item_1, mValues);
setListAdapter(adapter);
        return rootView;
    }

Answer 1

按照惯例创建列表视图，但在filterable适配器中，实现class CustomAdapter extends BaseAdapter implements Filterable { public View getView(){ ... } public Integer getCount() { ... } @Override public Filter getFilter() { Filter filter = new Filter() { @SuppressWarnings("unchecked") @Override protected void publishResults(CharSequence constraint, FilterResults results) { arrayListNames = (List<String>) results.values; notifyDataSetChanged(); } @Override protected FilterResults performFiltering(CharSequence constraint) { FilterResults results = new FilterResults(); ArrayList<String> FilteredArrayNames = new ArrayList<String>(); // perform your search here using the searchConstraint String. constraint = constraint.toString().toLowerCase(); for (int i = 0; i < mDatabaseOfNames.size(); i++) { String dataNames = mDatabaseOfNames.get(i); if (dataNames.toLowerCase().startsWith(constraint.toString())) { FilteredArrayNames.add(dataNames); } } results.count = FilteredArrayNames.size(); results.values = FilteredArrayNames; Log.e("VALUES", results.values.toString()); return results; } }; return filter; } }界面：

performFiltering

您需要在publishResults方法中实现过滤逻辑。它会将结果传递给ListView。

根据布局中的EditText和lv = (ListView) findViewById(R.id.list_view); inputSearch = (EditText) findViewById(R.id.inputSearch); // Adding items to listview adapter = new CustomAdapter(...); lv.setAdapter(adapter); inputSearch.addTextChangedListener(new TextWatcher() { @Override public void onTextChanged(CharSequence cs, int arg1, int arg2, int arg3) { // When user changed the Text getActivity().this.adapter.getFilter().filter(cs); } @Override public void beforeTextChanged(CharSequence arg0, int arg1, int arg2, int arg3) { } @Override public void afterTextChanged(Editable arg0) {} });，您可以使用以下内容：

{{1}}

这应该为您提供所需内容的要点。

Android ListFragment：实现搜索EditText

1 个答案: