<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" />

<?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>

// 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");  } 

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

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);   }