Android ListView 用EditText 实现搜索功能

(注: 教程使用的是android studio作为开发工具)

新建一个项目,选择Basic Activity:

content_main.xml布局代码:

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout 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"
    android:id="@+id/content_main"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    app:layout_behavior="@string/appbar_scrolling_view_behavior"
    tools:context="com.apizl.searchlistview.MainActivity"
    tools:showIn="@layout/activity_main">

    <EditText
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:inputType="textPersonName"
        android:text=""
        android:hint="输入搜索内容"
        android:id="@+id/editText" />

    <ListView
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:id="@+id/my_list"
        android:layout_below="@+id/editText"/>
</RelativeLayout>

放一个EditText作为搜索框,id命名为editText;然后下面放一个ListView,id为my_list;

再新建一个布局文件,作为listview的item布局:

<?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:orientation="vertical" android:layout_width="match_parent"
    android:layout_height="50dp"
    app:layout_collapseParallaxMultiplier="0.0"
    android:layout_gravity="center"
    android:padding="5dp">

    <TextView
        android:text="TextView"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:id="@+id/item" />
</LinearLayout>

放一个TextView,然后id就叫item;

主要代码: 

public class MainActivity extends AppCompatActivity {

    private ListView listView;
    private ArrayAdapter arrayAdapter;
    private EditText searchBox;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
        toolbar.setTitle("Listview 搜索");
        setSupportActionBar(toolbar);

        searchBox = (EditText) findViewById(R.id.editText); //搜索框
        listView = (ListView) findViewById(R.id.my_list); //listview布局
        //适配器   
        arrayAdapter = new ArrayAdapter(this, R.layout.list_item,R.id.item,
                new Object[]{"Hello World", "Hello Java", "Hello android", "Hello", "1234", "哈哈哈哈"});
        //设置适配器
        listView.setAdapter(arrayAdapter);
        //edittext的内容变更监视 
        searchBox.addTextChangedListener(new TextWatcher() {
            @Override
            public void beforeTextChanged(CharSequence s, int start, int count, int after) {

            }

            @Override
            public void onTextChanged(CharSequence s, int start, int before, int count) {
                arrayAdapter.getFilter().filter(s);  //一行代码实现搜索效果 
            }

            @Override
            public void afterTextChanged(Editable s) {

            }
        });

    }

}

效果图: