ActionBarSherlock的学习笔记（四） ------------ ActionBarSherlock中的搜索及SearchView的使用

在使用ActionBarSherlock定义app的头部操作时，会经常看见搜索的动作，本文主要介绍一下搜索是如何实现的。

1. SearchView

是搜索的核心组件，具体介绍请参考Android官方说明文档： http://developer.android.com/reference/android/widget/SearchView.html

XML属性

属性名称	描述
android:iconifiedByDefault	设置SearchView的默认状态。 如果为true，在没有被使用和点击展开时它将被图形化。
android:maxWidth	SearchView的可选择的最大宽度
android:queryHint	当查询条件为空时显示的一个提示字符串。

重要的接口

名称	作用
interface          SearchView.OnCloseListener	当用户关闭SearchView时触发的回调函数
interface          SearchView.OnQueryTextListener	当查询文本改变时的回调函数。
interface          SearchView.OnSuggestionListener	在建议上选择事件时的回调接口。

demo的核心代码

package com.hsx.wangcuo;

import android.app.SearchManager;
import android.database.Cursor;
import android.database.MatrixCursor;
import android.os.Bundle;
import android.provider.BaseColumns;
import android.view.LayoutInflater;
import android.view.View;
import com.actionbarsherlock.app.SherlockActivity;
import com.actionbarsherlock.view.MenuItem;
import com.actionbarsherlock.view.SubMenu;
import com.actionbarsherlock.widget.SearchView;
import com.hsx.wangcuo.adapter.QuerySuggestionsAdapter;
import com.hsx.wangcuo.util.ToastUtil;

public class MainActivity extends SherlockActivity implements SearchView.OnSuggestionListener, SearchView.OnQueryTextListener {
    private static final String[] COLUMNS = { BaseColumns._ID, SearchManager.SUGGEST_COLUMN_TEXT_1, };

    private QuerySuggestionsAdapter mSuggestionsAdapter;

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

    private void initActionBarTitle() {
        // 可以自定义actionbar
        getSupportActionBar().setDisplayShowCustomEnabled(true);
        getSupportActionBar().setDisplayShowTitleEnabled(false);
        // 不在actionbar显示logo
        getSupportActionBar().setDisplayShowHomeEnabled(false);
        View mainActionBarView = LayoutInflater.from(this).inflate(R.layout.main_action_bar, null);
        getSupportActionBar().setCustomView(mainActionBarView);
    }

    @Override
    public boolean onCreateOptionsMenu(com.actionbarsherlock.view.Menu menu) {

        createSearchItem(menu);

        /*************************************************/

        MenuItem share = menu.add(0, 1, 2, "share");
        share.setIcon(R.drawable.abs__ic_menu_share_holo_dark);
        share.setShowAsAction(MenuItem.SHOW_AS_ACTION_ALWAYS);

        /***************************************************/
        SubMenu addMenu = menu.addSubMenu(0, 2, 3, "overflow");
        addMenu.add(0, 3, 0, "更换主题");
        addMenu.add(0, 4, 0, "系统设置");
        addMenu.add(0, 5, 0, "修改密码");
        addMenu.add(0, 6, 0, "更换头像");

        MenuItem overFlowItem = addMenu.getItem();
        overFlowItem.setIcon(R.drawable.abs__ic_menu_moreoverflow_holo_dark);
        overFlowItem.setShowAsAction(MenuItem.SHOW_AS_ACTION_ALWAYS);

        return super.onCreateOptionsMenu(menu);
    }

    /**
     * Create the search view(搜索的核心代码)
     *
     * @param menu
     * @return void
     * @author hsx
     * @time 2014-3-16下午03:48:01
     */
    private void createSearchItem(com.actionbarsherlock.view.Menu menu) {

        SearchView searchView = new SearchView(getSupportActionBar().getThemedContext());
        searchView.setQueryHint("Search for countries…");
        searchView.setOnQueryTextListener(this);
        searchView.setOnSuggestionListener(this);

        if (mSuggestionsAdapter == null) {
            MatrixCursor cursor = new MatrixCursor(COLUMNS);
            cursor.addRow(new String[] { "1", "'Murica" });
            cursor.addRow(new String[] { "2", "Canada" });
            cursor.addRow(new String[] { "3", "Denmark" });
            mSuggestionsAdapter = new QuerySuggestionsAdapter(getSupportActionBar().getThemedContext(), cursor);
        }

        searchView.setSuggestionsAdapter(mSuggestionsAdapter);

        MenuItem searchItem = menu.add(0, 0, 0, "search");
        searchItem.setIcon(R.drawable.abs__ic_search);
        searchItem.setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM | MenuItem.SHOW_AS_ACTION_COLLAPSE_ACTION_VIEW);
        searchItem.setActionView(searchView);
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        switch (item.getItemId()) {
        case 1:
            ToastUtil.showShortToast(MainActivity.this, "分享");
            break;
        case 3:
            ToastUtil.showShortToast(MainActivity.this, "更换主题");
            break;
        case 4:
            ToastUtil.showShortToast(MainActivity.this, "系统设置");
            break;
        case 5:
            ToastUtil.showShortToast(MainActivity.this, "修改密码");
            break;
        case 6:
            ToastUtil.showShortToast(MainActivity.this, "更换头像");
            break;
        }
        return super.onOptionsItemSelected(item);
    }

    /***
     * implements SearchView.OnQueryTextListener
     */
    @Override
    public boolean onQueryTextSubmit(String query) {
        ToastUtil.showShortToast(this, "You searched for: " + query);
        return true;
    }

    /***
     * implements SearchView.OnQueryTextListener
     */
    @Override
    public boolean onQueryTextChange(String newText) {
        return false;
    }

    /**
     * implements SearchView.OnSuggestionListener
     */
    @Override
    public boolean onSuggestionSelect(int position) {
        return false;
    }

    /**
     * implements SearchView.OnSuggestionListener
     */
    @Override
    public boolean onSuggestionClick(int position) {
        Cursor c = (Cursor) mSuggestionsAdapter.getItem(position);
        String query = c.getString(c.getColumnIndex(SearchManager.SUGGEST_COLUMN_TEXT_1));
        ToastUtil.showShortToast(this, "Suggestion clicked: " + query);
        return true;
    }

}

/*******************************************************************************************************************************/

QuerySuggestionsAdapter

package com.hsx.wangcuo.adapter;

import android.app.SearchManager;
import android.content.Context;
import android.database.Cursor;
import android.support.v4.widget.CursorAdapter;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TextView;

public class QuerySuggestionsAdapter extends CursorAdapter {

    public QuerySuggestionsAdapter(Context context, Cursor c) {
        super(context, c, 0);
    }

    @Override
    public View newView(Context context, Cursor cursor, ViewGroup parent) {
        LayoutInflater inflater = LayoutInflater.from(context);
        View v = inflater.inflate(android.R.layout.simple_list_item_1, parent, false);

        return v;
    }

    @Override
    public void bindView(View view, Context context, Cursor cursor) {
        TextView tv = (TextView) view;
        final int textIndex = cursor.getColumnIndex(SearchManager.SUGGEST_COLUMN_TEXT_1);
        tv.setText(cursor.getString(textIndex));
    }
}

效果图如下：

还有一个小的bug，没有找到解决方法：输入一个字母的时候，不弹出提示

demo的地址 :   http://download.csdn.net/detail/abc13939746593/7061035