效果(不动请戳大图)
ToolBar添加 menu
toolbar.inflateMenu(R.menu.toolbar_menu);
menu 文件
<menu>
<item
android:id="@+id/action_search_kl"
android:title="@string/action_search_knowledge"
android:orderInCategory="80"
app:actionViewClass="android.support.v7.widget.SearchView"
android:icon="@drawable/ic_search"
app:showAsAction="always" />
</menu>
根据 itemId 找到该 item
MenuItem item= toolbar.findViewById(R.id.action_search_kl);
通过 menuitem 获取里面的 view,进行各种样式更改
private void initSearchView(final MenuItem item){
//通过 item 获取 actionview
final SearchView searchView = (SearchView) item.getActionView();
searchView.setQueryHint("搜索知识库");
//改变默认的搜索图标
((ImageView)searchView.findViewById(R.id.search_button)).setImageResource(R.drawable.ic_search);
//搜索监听
searchView.setOnQueryTextListener(new SearchView.OnQueryTextListener() {
@Override
public boolean onQueryTextSubmit(String query) {
//在输入法按下搜索或者回车时,会调用次方法,在这里可以作保存历史记录的操作,我这里用了 sharepreference保存
SPUtils spUtils = new SPUtils("knowledgeHistory");
spUtils.put(query, query);
presenter.searchKnowledge(query);
return false;
} @Override
public boolean onQueryTextChange(String newText) {
//输入字符则回调此方法
//当输入字符为空时,重新设置 item
if(newText==null||newText.length()==0){
//由于实现了历史数据的功能,在此重新设置此 item才能实时生效
initSearchView(item); }
return false;
}
});
//根据id-search_src_text获取TextView
searchViewOfKnowledge = (SearchView.SearchAutoComplete) searchView.findViewById(R.id.search_src_text);
//改变输入文字的颜色
searchViewOfKnowledge.setTextColor(ContextCompat.getColor(HomeTabActivity.this, R.color.colorAccent));
try {
//取出历史数据,你可以利用其他方式
final List<String> arr = new ArrayList<>();
SPUtils spUtils = new SPUtils("knowledgeHistory");
Map<String, ?> map = spUtils.getAll();
for (String key : map.keySet()) {
arr.add(map.get(key).toString());
}
//显示历史数据列表
searchViewOfKnowledge.setThreshold(0);
//历史数据列表的 adapter,必须继承 ArrayAdater 或实现 filterable接口
HistoryAdapter adapter = new HistoryAdapter(HomeTabActivity.this, R.layout.item_history, arr,searchView);
//设置 adapter
searchViewOfKnowledge.setAdapter(adapter);
//如果重写了 Adapter 的 getView 方法,可以不用实现 item 监听(实现了也没用),否则必须实现监听,不然会报错
searchViewOfKnowledge.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> adapterView, View view, int position, long l) {
searchView.setQuery(arr.get(position), true);
}
});
} catch (NullPointerException e) {
e.printStackTrace();
}
//searchview 的关闭监听
searchView.setOnCloseListener(new SearchView.OnCloseListener() { @Override public boolean onClose() {
return false;
}
});}
历史列表的 adapter,带删除功能
item 布局
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="horizontal"
android:gravity="center_vertical"
android:layout_width="match_parent"
android:background="@drawable/touch_bg"
android:padding="10dp"
android:clickable="true"
android:layout_height="wrap_content">
<TextView
android:id="@+id/titleTv"
android:text="hahaha"
android:layout_centerVertical="true"
android:layout_width="match_parent"
android:layout_height="wrap_content" />
<ImageButton
android:background="@drawable/ic_close"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerVertical="true"
android:layout_alignParentRight="true"
android:layout_gravity="right"
android:id="@+id/imageButton" />
</RelativeLayout>
adapter
构造方法必须带有布局ID,传入SearchView 是为了点击 item 之后可以在SearchView 直接显示点击的文字
public HistoryAdapter(Context context, int resourceId, List<String> titles,SearchView searchView) {
super(context, resourceId, objects);
this.context=context;
this.titles=titles;
this.resourceId=resourceId;
this.searchView=searchView;
}
省略 getItem,getCount,getItemId方法,主要看 getView 中删除按钮的点击方法
holder.imageButton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
SPUtils spUtils = new SPUtils("knowledgeHistory");
//从数据中移除该项
spUtils.remove(titles.get(i));
//从数据中移除该项
titles.remove(i);
//进行刷新
notifyDataSetChanged(); }});
必须重写 ArrayAdapter的getFilter()方法,如果不重写此方法,只会一直显示历史列表,则无法实现输入文字进行筛选的效果
//用于保存原始数据
private List<String> mOriginalValues;
@NonNull@Override
public Filter getFilter() {
Filter filter = new Filter() {
@SuppressWarnings("unchecked")
@Override
protected void publishResults(CharSequence constraint,FilterResults results) {
titles = (List<String>) results.values; // 得到筛选后的列表结果
notifyDataSetChanged(); // 刷新数据 }
@Override
protected FilterResults performFiltering(CharSequence constraint) {
FilterResults results = new FilterResults();
List<String> filteredArrList = new ArrayList<String>();
if (mOriginalValues == null) {
//保存一份未筛选前的完整数据
mOriginalValues = new ArrayList<String>(titles);
} if (constraint == null || constraint.length() == 0) { //如果接收到的文字为空,则不作比较,直接返回未筛选前的完整数据
results.count = mOriginalValues.size();
results.values = mOriginalValues;
} else {
//遍历原始数据,与接收到的文字作比较,得到筛选结果
constraint = constraint.toString().toLowerCase();
for (int i = 0; i < mOriginalValues.size(); i++) {
String data = mOriginalValues.get(i); if(data.toLowerCase().startsWith(constraint.toString())) {
filteredArrList.add(data);
}
}
//返回得到的筛选列表
results.count = filteredArrList.size();
results.values = filteredArrList; } return results; } }; return filter;}