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Android搜索自动提示功能 AutocompleteTextView
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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
.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...
