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

   /**
   * 當(dāng)搜索框中的文字發(fā)生變化的時候回調(diào)此方法
   * @param charSequence 輸入框的文字
   * @param start 開始
   * @param before 
   * @param count 字?jǐn)?shù)
   */
   @Override
   public void onTextChanged(CharSequence charSequence, int start, int before, int count) {
   //在這里進(jìn)行邏輯請求
   }
   @Override
   public void afterTextChanged(Editable s) {

   }
  });

```
if (!TextUtils.isEmpty(charSequence) && charSequence.length() > 3) { //這里的3只是為了模擬請求
    mKey = charSequence.toString();
    initData(charSequence.toString());
    changeStates(STATE);
   } else {
    STATE = NO_TTHING;
    changeStates(STATE);
   }
/**

 * 首次獲取數(shù)據(jù)
 *
 * @param key 高亮值
 */
private void initData(String key) {

 //這里是模擬網(wǎng)絡(luò)請求的 實際就是走網(wǎng)絡(luò)獲取數(shù)據(jù)
 String result = JsonUtils.getJson(this, "search.json");
 Gson gson = new Gson();
 SearchBean searchBean = gson.fromJson(result, SearchBean.class);
 if (searchBean != null) {
  mDataBeen = searchBean.getData();
  if (mDataBeen != null && mDataBeen.size() > 0) {
   STATE = SHOW_DATA;
   mSearchAdapter.loadData(mDataBeen, key);
  } else {
   STATE = NO_TTHING;
  }
 } else {
  STATE = NO_TTHING;
 }
}
/**

 * 改變搜索狀態(tài)
 *
 * @param state 搜索key值
 */
private void changeStates(int state) {
 switch (state) {
  case NO_TTHING:
   mNoLayout.setVisibility(View.VISIBLE);
   recycler_view.setVisibility(View.INVISIBLE);
   break;

  case SHOW_DATA:
   mNoLayout.setVisibility(View.GONE);
   recycler_view.setVisibility(View.VISIBLE);
   break;
 }
}

/**

 * @param context  上下文
 * @param wholeStr  全部文字
 * @param highlightStr 改變顏色的文字
 * @param color  顏色
 */
public StringFormatUtil(Context context, String wholeStr, String highlightStr, int color) {
 this.mContext = context;
 this.wholeStr = wholeStr;
 this.highlightStr = highlightStr;
 this.color = color;
}

/**
 * 填充顏色
 *
 * @return StringFormatUtil
 */
public StringFormatUtil fillColor() {

 if (!TextUtils.isEmpty(wholeStr) && !TextUtils.isEmpty(highlightStr)) {
  spBuilder = new SpannableStringBuilder(wholeStr);
  //匹配規(guī)則
  Pattern p = Pattern.compile(highlightStr);
  //匹配字段
  Matcher m = p.matcher(spBuilder);
  //上色
  color = mContext.getResources().getColor(color);
  //開始循環(huán)查找里面是否包含關(guān)鍵字 使得一句話中出現(xiàn)多個關(guān)鍵詞都會被高亮
  while (m.find()) {
   int start = m.start();
   int end = m.end();
   spBuilder.setSpan(new ForegroundColorSpan(color), start, end, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
  }
  return this;
 }
 return null;
}

/**
 * 獲取到已經(jīng)更改好的結(jié)果(這個時候已經(jīng)實現(xiàn)了高亮,在獲取這個result的時候不要toString()要不然會把色調(diào)去除的)
 *
 * @return result
 */
public SpannableStringBuilder getResult() {
 if (spBuilder != null) {
  return spBuilder;
 }
 return null;
}
// 進(jìn)行工具類使用,也就是在給title賦值的時候使用

//這個是adapter里面的使用規(guī)則
 mFormatUtil = new StringFormatUtil(holder.itemView.getContext(), dataBean.getTitle(), mLightStr, R.color.colorAccent).fillColor();

 holder.tv_title.setText(mFormatUtil.getResult());
```