UI复习-组件:SearchView(搜索过滤)

package com.brady.est;

import android.annotation.SuppressLint;
import android.os.Bundle;
import android.support.v7.app.ActionBarActivity;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.ArrayAdapter;
import android.widget.ListView;
import android.widget.SearchView;
import android.widget.Toast;

@SuppressLint({ "HandlerLeak", "ClickableViewAccessibility" })
public class MainActivity extends ActionBarActivity implements SearchView.OnQueryTextListener{

    private String[] keywords = {"fdsaddd","fdaddddd","ccccccccccc","b"};    
    private ListView listView;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        
        SearchView searchView = (SearchView)findViewById(R.id.searchView);
        searchView.setQueryHint("查询");
        searchView.setSubmitButtonEnabled(true);
        searchView.setOnQueryTextListener(this);
        searchView.setIconifiedByDefault(false);
        
        listView = (ListView)findViewById(R.id.list);
        listView.setAdapter(new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1,keywords));
        listView.setTextFilterEnabled(true);
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.main, menu);
        return true;
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        // Handle action bar item clicks here. The action bar will
        // automatically handle clicks on the Home/Up button, so long
        // as you specify a parent activity in AndroidManifest.xml.
        int id = item.getItemId();
        if (id == R.id.action_settings) {
            return true;
        }
        return super.onOptionsItemSelected(item);
    }

    @Override
    public boolean onQueryTextSubmit(String query) {
        Toast.makeText(this, query, 1000).show();
        return false;
    }

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

<LinearLayout 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"
      android:orientation="vertical"
    android:id="@+id/root"
    android:padding="5dip"
    tools:context="com.brady.est.MainActivity" >
     
   
    <SearchView 
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:id="@+id/searchView"/>
    <ListView 
        android:id="@+id/list"
        android:layout_width="match_parent"
        android:layout_height="match_parent"/> 
        
</LinearLayout>