Android搜索自动提示功能 AutocompleteTextView

 

 

1.配置main.xml中自动提示控件：

<AutoCompleteTextViewandroid:id="@+id/autotv_searchresult"android:layout_width="280dip"android:layout_height="35dip"android:layout_centerInParent="true"android:background="#00000000"android:completionThreshold="1"android:imeOptions="actionSearch"android:dropDownHeight="wrap_content"android:dropDownVerticalOffset="10dip"android:hint="搜索歌曲,歌手,音乐盒名..."android:singleLine="true" />

 

 

注：android:dropDownVerticalOffset="10dip"是可以将提示的信息与边框开一段距离的属性，通常都会用的到

 

2.建立搜索栏的布局.xml：

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"android:layout_width="fill_parent"android:layout_height="fill_parent"android:orientation="vertical" ><TextViewandroid:id="@+id/brandName"android:layout_width="fill_parent"android:layout_height="wrap_content" /><TextViewandroid:id="@+id/searchText"android:layout_width="fill_parent"android:layout_height="wrap_content"android:visibility="gone" /></LinearLayout>

 

 

注： android:visibility="gone"这个是加入输入英文字母有中文提示的关键性代码

 

 

3.定义2个数组并在程序的开始给数组赋值：

// 所有搜索的信息public static ArrayList<HashMap<String, String>> list_searchAll = new ArrayList<HashMap<String, String>>();// 一些搜索的信息public static ArrayList<HashMap<String, String>> list_searchSome = new ArrayList<HashMap<String, String>>();private void addAllSearch(String input, String output){HashMap<String, String> item;item = new HashMap<String, String>();item.put("brandSearchText", input);item.put("brandName", output);list_searchAll.add(item);}private void addAllSearchItems(){addAllSearch("XBH xuebuhui xbh", "学不会");addAllSearch("YXJ yixiangji yxj", "异想记");addAllSearch("XWZ xiaowangzi wangzi", "小王子的漂流瓶");addAllSearch("XYGZJ xiayige xygzj", "下一个自己");addAllSearch("NYFZ nuoyafanzhou nyfz", "诺亚方舟");addAllSearch("XT xintiao xt", "心跳");addAllSearch("QS qinshang qs", "琴伤");addAllSearch("AQSFYR aiqinshifou aqsf", "爱情是否依然");addAllSearch("NZFRSM nizaifanrao nzfrsm", "你在烦扰什么");addAllSearch("WMHGHD womenghuigenghaode wmhgh", "我们会更好的");}private void addSomeSearch(String input, String output){HashMap<String, String> item;item = new HashMap<String, String>();item.put("brandSearchText", input);item.put("brandName", output);list_searchSome.add(item);}private void addSomeSearchItems(){// AaddSomeSearch("AQMM aiqingmaima", "爱情买卖");addSomeSearch("AWNJBBW aiwonijiubbw", "爱我你就抱抱我");addSomeSearch("ABZJFFS aibuzaijiuffs", "爱不在就放放手");// BaddSomeSearch("BCYS banchengyansha", "半城烟沙");addSomeSearch("BFSDLA bufengshoudelianai", "不分手的恋爱");addSomeSearch("BYGSMM buyaogaoshumama", "不要告诉妈妈");}

 

 

 

4.得到控件id，创建SimpleAdapter适配器：

private AutoCompleteTextView autotv_search;
private SimpleAdapter mAdapter;autotv_search = (AutoCompleteTextView) findViewById(R.id.autotv_search);

 

注：适配器的实例化可以在监听中

 

5.设置AutoCompleteTextView的监听

private void autoSearchListen(){autotv_search.setOnKeyListener(new View.OnKeyListener(){// 添加软键盘事件（让软键盘有一个搜索的图标）
   @Overridepublic boolean onKey(View v, int keyCode, KeyEvent event){// TODO Auto-generated method stubif (keyCode == KeyEvent.KEYCODE_ENTER){if (event.getAction() == KeyEvent.ACTION_UP){InputMethodManager imm = (InputMethodManager) v.getContext().getSystemService(Context.INPUT_METHOD_SERVICE);if (imm.isActive()){imm.hideSoftInputFromWindow(v.getApplicationWindowToken(), 0);}return true;}}return false;}});注：if (keyCode == KeyEvent.KEYCODE_ENTER){if (event.getAction() == KeyEvent.ACTION_UP){是当回车键起来的时候才触发不然会被调用2次，一次按下一次弹起autotv_search.setOnClickListener(new OnClickListener(){@Overridepublic void onClick(View v){// TODO Auto-generated method stubif (autotv_search.getText().toString().equals("")){mAdapter = new SimpleAdapter(SearchActivity.this,HomeActivity.list_searchAll, R.layout.searchlist, new String[] {"brandSearchText", "brandName" },new int[] { R.id.tv_searchText, R.id.tv_brandName });autotv_search.setAdapter(mAdapter);autotv_search.showDropDown();}}});注：点击搜索框触发，记得参数都要一一对应，你懂的...autotv_search.showDropDown();手动弹出提示autotv_search.setOnFocusChangeListener(new OnFocusChangeListener(){@Overridepublic void onFocusChange(View v, boolean hasFocus){if (hasFocus & autotv_search.getText().toString().equals("")){mAdapter = new SimpleAdapter(SearchActivity.this,HomeActivity.list_searchAll, R.layout.searchlist, new String[] {"brandSearchText", "brandName" },new int[] { R.id.tv_searchText, R.id.tv_brandName });autotv_search.setAdapter(mAdapter);autotv_search.showDropDown();}}});// 点击条目的监听autotv_search.setOnItemClickListener(new OnItemClickListener(){@Overridepublic void onItemClick(AdapterView<?> parent, View view,int position, long id){TextView tv =  (TextView) view.findViewById(R.id.tv_brandName);autotv_search.setText(tv.getText().toString());autotv_search.setSelection(autotv_search.getText().toString().length());}});//TextWatcher 是本应用的关键地方...这里感谢云童鞋给的提示，当字符产生变换的时候就调用
TextWatcher tw = new TextWatcher(){@Overridepublic void onTextChanged(CharSequence s, int start, int before, int count){// TODO Auto-generated method stubif (autotv_search.getText().toString().equals("")){mAdapter = new SimpleAdapter(SearchActivity.this,HomeActivity.list_searchAll, R.layout.searchlist, new String[] {"brandSearchText", "brandName" },new int[] { R.id.tv_searchText, R.id.tv_brandName });autotv_search.setAdapter(mAdapter);autotv_search.showDropDown();} else if (autotv_search.getText().toString().length() < 3){mAdapter = new SimpleAdapter(SearchActivity.this,HomeActivity.list_searchSome, R.layout.searchlist, new String[] {"brandSearchText", "brandName" },new int[] { R.id.tv_searchText, R.id.tv_brandName });autotv_search.setAdapter(mAdapter);// mAdapter.notifyDataSetChanged();
    }}@Overridepublic void beforeTextChanged(CharSequence s, int start, int count,int after){// TODO Auto-generated method stub
    }@Overridepublic void afterTextChanged(Editable s){// TODO Auto-generated method stubif (autotv_search.getText().toString().equals("")){mAdapter = new SimpleAdapter(SearchActivity.this,HomeActivity.list_searchAll, R.layout.searchlist, new String[] {"brandSearchText", "brandName" },new int[] { R.id.tv_searchText, R.id.tv_brandName });autotv_search.setAdapter(mAdapter);autotv_search.showDropDown();}}};// 添加文字改变的监听
  autotv_search.addTextChangedListener(tw);}

 

结束语：这样一直改变适配器的方法不知道会不会在性能上产生一定的问题...在真机上测试还是很快速的，程序还有很多要优化的地方，如果有更好的方法的还望指点呀...