adap与listview结合使用

 

package com.example.searchview2;

import android.os.Bundle;
import android.app.Activity;
import android.text.TextUtils;
import android.view.Menu;
import android.widget.ArrayAdapter;
import android.widget.ListView;
import android.widget.SearchView;
import android.widget.TextView;

public class MainActivity extends Activity implements SearchView.OnQueryTextListener{
    ListView listView;
    SearchView searchView;
    String[] names;
    ArrayAdapter adapter;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        names=new String[]{"aa","ddf","qw","sd","fd","as","cf","re","fg"};
        listView=(ListView) findViewById(R.id.list);
        searchView=(SearchView) findViewById(R.id.searchView);
         //Note that the Adapter used by this view must implement the Filterable interface.
        listView.setAdapter(adapter=new ArrayAdapter(getApplicationContext(), android.R.layout.simple_expandable_list_item_1,names));
        //设置当在搜索栏里输入内容时，内容在一个小框框中显示（类似textview），若没有这行代码则没有这样的效果
        listView.setTextFilterEnabled(true);
        //setIconifiedByDefault为true时，searchview不是展开的，当为false时searchview一开始就是展开的
        searchView.setIconifiedByDefault(true);
        searchView.setOnQueryTextListener(this);
        searchView.setSubmitButtonEnabled(false);
        searchView.setQueryHint("INPUT");

    }

    @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 onQueryTextChange(String newText) {
        // TODO Auto-generated method stub
        //TextUtils.isEmpty(string)判断（）里面string是否为空，或者为0字节
        //若为空或0字节则返回false,否则为true
        if (TextUtils.isEmpty(newText)) {
            //Clear the text filter.
            listView.clearTextFilter();
        }else {
            //Sets the initial value for the text filter.
            listView.setFilterText(newText.toString());
        }
        return false;
    }

    @Override
    public boolean onQueryTextSubmit(String query) {
        // TODO Auto-generated method stub
        return false;
    }

}