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...