<LinearLayout
  android:layout_width="match_parent"
  android:layout_height="45dp"
  android:background="@color/black_14141f"
  android:gravity="center_vertical"
  android:orientation="horizontal"
  android:paddingBottom="6dp"
  android:paddingTop="6dp">

  <ImageView
    android:id="@+id/iv_back"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:paddingLeft="14dp"
    android:paddingRight="14dp"
    android:src="@drawable/icon_back" />

  <RelativeLayout
    android:id="@+id/rl_search_layout"
    android:layout_width="0dp"
    android:layout_weight="1"
    android:layout_height="wrap_content"
    android:background="@drawable/shape_search_bj"
    android:gravity="center"
    android:orientation="horizontal">

    <!--      <ImageView
            android:layout_centerVertical="true"
            android:layout_alignParentLeft="true"
            android:id="@+id/tv"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginTop="5dp"
            android:layout_marginBottom="5dp"
            android:background="@drawable/icon_black_search" />-->

    <EditText
      android:id="@+id/et_search"
      android:layout_width="match_parent"
      android:layout_height="30dp"
      android:layout_centerVertical="true"
      android:layout_marginLeft="10dp"
      android:layout_toLeftOf="@+id/close"
      android:layout_toRightOf="@+id/tv"
      android:background="@null"
      android:hint="输入商品名或者店铺名称"
      android:imeOptions="actionSearch"
      android:singleLine="true"
      android:textColor="@color/black3"
      android:textColorHint="@color/gray_aaaaaa"
      android:textSize="14sp" />


    <!--      <ImageView
            android:layout_centerVertical="true"
            android:layout_alignParentRight="true"
            android:id="@+id/clear_search"
            android:background="@drawable/icon_dialog_close"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:gravity="center"
            android:textColor="@color/white"
            android:textSize="18sp" />-->

  </RelativeLayout>

  <TextView
    android:id="@+id/tv_cancel"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_marginLeft="14dp"
    android:layout_marginRight="14dp"
    android:gravity="center_vertical"
    android:text="取消"
    android:textColor="@color/white"
    android:textSize="18sp" />

</LinearLayout>

<LinearLayout
  android:id="@+id/ll_search_history"
  android:layout_width="match_parent"
  android:layout_height="match_parent"
  android:orientation="vertical">

  <TextView
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_marginBottom="14dp"
    android:layout_marginLeft="14dp"
    android:layout_marginTop="14dp"
    android:drawableLeft="@drawable/brand_search_history_icon"
    android:drawablePadding="10dp"
    android:text="历史记录"
    android:textColor="#333333" />

  <View
    android:layout_width="match_parent"
    android:layout_height="1dp"
    android:background="@color/bg_dfdfdf" />

  <ListView
    android:id="@+id/listView"
    android:divider="@null"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"></ListView>

</LinearLayout>

android:imeOptions="actionSearch"

mEditTextSearch.setOnEditorActionListener(new TextView.OnEditorActionListener() {
  @Override
  public boolean onEditorAction(TextView v, int actionId, KeyEvent event) {
    if (actionId == EditorInfo.IME_ACTION_SEARCH) {
      // 先隐藏键盘
      ((InputMethodManager) mEditTextSearch.getContext().getSystemService(Context.INPUT_METHOD_SERVICE))
          .hideSoftInputFromWindow(MainActivity.this.getCurrentFocus().getWindowToken(), InputMethodManager.HIDE_NOT_ALWAYS);
      //搜索具体逻辑
      //搜索请求转交给函数去处理：
      //search(String.valueOf(mEditTextSearch.getText()));
      Toast.makeText(MainActivity.this,"按下了搜索按钮",Toast.LENGTH_SHORT).show();
      return true;
    }
    return false;
  }
});

 mEditTextSearch.addTextChangedListener(new TextWatcher() {
      @Override
      public void beforeTextChanged(CharSequence s, int start, int count, int after) {

      }

      @Override
      public void onTextChanged(CharSequence s, int start, int before, int count) {

      }

      @Override
      public void afterTextChanged(Editable s) {
//文字变动 ， 有未发出的搜索请求，应取消
        if(mHandler.hasMessages(MSG_SEARCH)){
          mHandler.removeMessages(MSG_SEARCH);
        }
        //如果为空 直接显示搜索历史
        if(TextUtils.isEmpty(s)){
          //showHistory();
        }else {//否则延迟500ms开始搜索
          mHandler.sendEmptyMessageDelayed(MSG_SEARCH,500); //自动搜索功能 删除
        }
      }
    });
  }
  private Handler mHandler = new Handler(){
    @Override
    public void handleMessage(Message msg) {
      //搜索请求
      Toast.makeText(MainActivity.this,"搜索中。。。。",Toast.LENGTH_SHORT).show();
      //search(String.valueOf(mEditTextSearch.getText()));
    }
  };
  private static final int MSG_SEARCH = 1;

private SimpleDateFormat mFormat;
mFormat = new SimpleDateFormat("yyyyMMddHHmmss");
/**
 * 将历史记录保存至sp中，key=当前时间(20160302133455，便于排序) ，value=关键字
 * @param keyWords
 */
private void saveSearchHistory(String keyWords) {
  //保存之前要先查询sp中是否有该value的记录，有则删除.这样保证搜索历史记录不会有重复条目
  Map<String, String> historys = (Map<String, String>) SearchHistoryUtils.getAll(getActivity());
  for (Map.Entry<String, String> entry : historys.entrySet()) {
    if(keyWords.equals(entry.getValue())){
      SearchHistoryUtils.remove(getActivity(),entry.getKey());
    }
  }
  SearchHistoryUtils.put(getActivity(), "" + mFormat.format(new Date()), keyWords);
}

/**
 * 最多显示几条历史记录
 */
private static final int HISTORY_MAX = 5;
/**
 * 从SP查询搜索历史，并按时间显示
 */
private void showSearchHistory() {
  Map<String, String> hisAll = (Map<String, String>) SearchHistoryUtils.getAll(getActivity());
  //将key排序升序
  Object[] keys = hisAll.keySet().toArray();
  Arrays.sort(keys);
  int keyLeng = keys.length;
  //这里计算 如果历史记录条数是大于 可以显示的最大条数，则用最大条数做循环条件，防止历史记录条数-最大条数为负值，数组越界
  int hisLeng = keyLeng > HISTORY_MAX ? HISTORY_MAX : keyLeng;
  for (int i = 1; i <= hisLeng; i++) {
    mResults.add(hisAll.get(keys[keyLeng - i]));
  }
  mAdapter.setDatas(mResults);
  //如果size不为0 显示footerview
  mFooterView.setVisibility(0!=mResults.size()?View.VISIBLE:View.GONE);
}

/**
 * 清楚历史记录
 */
private void clearsearchHistory() {
  SearchHistoryUtils.clear(this);
  //同时刷新历史记录显示页面
  //mResults = new ArrayList<>();
  //mAdapter.setDatas(mResults);
  //如果size不为0 显示footerview
  //mFooterView.setVisibility(0!=mResults.size()?View.VISIBLE:View.GONE);
}

/**
 * 删除多余的历史记录
 * 如果历史记录数量大于限定数量(10条)，则按key升序排序，删除前几条
 */
private void delMoreSearchHistory() {

  Map<String, String> hisAll = (Map<String, String>) SearchHistoryUtils.getAll(this);
  if (hisAll.size() > HISTORY_MAX) {
    //将key排序升序
    Object[] keys = hisAll.keySet().toArray();
    Arrays.sort(keys);
    // LENGTH = 12 , MAX = 10 , I = 1,0,count =2;
    for (int i = keys.length - HISTORY_MAX - 1; i > -1; i--) {
      SearchHistoryUtils.remove(this, (String) keys[i]);
    }
  }

}