Android搜索自动提示功能 AutocompleteTextView
1.配置main.xml中自动提示控件：
<AutoCompleteTextView android: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" > <TextView android:id="@+id/brandName" android:layout_width="fill_parent" android:layout_height="wrap_content" /> <TextView android: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() { // A addSomeSearch("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"); // B addSomeSearch("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） @Override public boolean onKey(View v, int keyCode, KeyEvent event) { // TODO Auto-generated method stub if (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() { @Override public void onClick(View v) { // TODO Auto-generated method stub if (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() { @Override public 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() { @Override public 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() { @Override public void onTextChanged(CharSequence s, int start, int before, int count) { // TODO Auto-generated method stub if (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(); } } @Override public void beforeTextChanged(CharSequence s, int start, int count, int after) { // TODO Auto-generated method stub } @Override public void afterTextChanged(Editable s) { // TODO Auto-generated method stub if (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...
