修改 searchView 中的 android:textColorHighlight及限定查詢字串長度

身為一個初接觸 android app 開發的菜鳥，很多簡單的事都要花時間去找方法

@怎麼增加一個searchView
1.  新增一個 .xml 在 res/menu下

<?xml version="1.0" encoding="utf-8"?>
<menu xmlns:android="http://schemas.android.com/apk/res/android" >
    <item
        android:id="@+id/action_search"
        android:actionViewClass="android.widget.SearchView"
        android:icon="@drawable/search"
        android:showAsAction="always"
        android:title="@string/title_txt"/>
</menu>

2. java code裡怎麼用

getMenuInflater().inflate(R.menu.XXXX, menu);
MenuItem searchItem = menu.findItem(R.id.action_search);
searchView = (SearchView) searchItem.getActionView();
searchView.setQueryHint(getText(R.string.XXXXX));

3. 怎麼修改searchView中字反白的背景顏色(HighLight color)
    在java code中set textColorHighlight
    假設我要設定成 #0FC698 (雖然會超出版面，不過換行後也不好閱讀，就不換行了)

int searchPlateId = searchView.getContext().getResources().getIdentifier("android:id/search_plate", null, null);
View searchPlate = searchView.findViewById(searchPlateId);
if (searchPlate!=null) {
    int searchTextId = searchPlate.getContext().getResources().getIdentifier("android:id/search_src_text", null, null);
    TextView searchText = (TextView) searchPlate.findViewById(searchTextId);
    if (searchText!=null) {
 searchText.setHighlightColor(Color.parseColor("#00C698"));
    }
}

4. 查詢字數太長，會造成 JavaBinder: !!! FAILED BINDER TRANSACTION !!!

  所以需要限定查詢字數，這部份在onQueryTextChange處理

public boolean onQueryTextChange(String newText) {
    //Set Query text length limit - by Francine
    if(newText.length()>50){
 Log.i(TAG, "Text character is more than 50");
 searchView.setQuery(newText.substring(0,50), false);
    }

}

ref:

techrepublic- pro-tip-customize-the-android-search-view-widget

stackoverflow- android-actionbar-customize-search-view