SearchView安卓

Question

我是安卓新手，我正在尝试创建一个SearchView。我不明白为什么由于某种原因，负责添加搜索管理器和提供搜索小部件的3行代码会使我的应用程序崩溃。有什么建议吗？

public boolean onCreateOptionsMenu(Menu menu)
{
    // Inflate the menu; this adds items to the action bar if it is present.
    MenuInflater inflater = getMenuInflater();
    inflater.inflate(R.menu.option_menu, menu);

    // Add SearchWidget
    SearchManager searchManager = (SearchManager) getSystemService(Context.SEARCH_SERVICE);
    SearchView searchView = (SearchView) menu.findItem(R.id.search).getActionView();

    searchView.setSearchableInfo(searchManager.getSearchableInfo(getComponentName()));

    return super.onCreateOptionsMenu(menu);
}

Answer 1

​

​

​

​

Menu.xml

​

<!-- Search Widget -->
<item
    android:id="@+id/action_search"
    android:actionViewClass="android.widget.SearchView"
    android:showAsAction="always"
    android:title="Search"/>

​

activity_search_results.xml

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".SplashActivity" >

    <ListView
        android:id="@+id/listview"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:cacheColorHint="#00000000" />

</RelativeLayout>

Java类

public class SearchActivity extends Activity {

    private ArrayAdapter<String> myAdapter;
    private ListView listView;
    private String[] dataArray = new String[] { "India", "USA", "UK",
            "Srilanka", "Nepal", "Japan" };

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_search_results);

        listView = (ListView) findViewById(R.id.listview);
        myAdapter = new ArrayAdapter<String>(this,
                android.R.layout.simple_list_item_1, dataArray);
        listView.setAdapter(myAdapter);
        listView.setTextFilterEnabled(true);

    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        MenuInflater inflater = getMenuInflater();
        inflater.inflate(R.menu.main, menu);

        SearchManager searchManager = (SearchManager) getSystemService(Context.SEARCH_SERVICE);
        SearchView searchView = (SearchView) menu.findItem(R.id.action_search)
                .getActionView();

        searchView.setSearchableInfo(searchManager
                .getSearchableInfo(getComponentName()));
        SearchView.OnQueryTextListener textChangeListener = new SearchView.OnQueryTextListener() {
            @Override
            public boolean onQueryTextChange(String newText) {
                // this is your adapter that will be filtered
                myAdapter.getFilter().filter(newText);
                System.out.println("on text chnge text: " + newText);
                return true;
            }

            @Override
            public boolean onQueryTextSubmit(String query) {
                // this is your adapter that will be filtered
                myAdapter.getFilter().filter(query);
                System.out.println("on query submit: " + query);
                return true;
            }
        };
        searchView.setOnQueryTextListener(textChangeListener);

        return super.onCreateOptionsMenu(menu);

    }
}

Done