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

更多相关文章

随机推荐