<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".SearchBoxActivity"
    android:orientation="vertical"
    >
    <EditText
        android:id="@+id/et_search"
        android:layout_width="match_parent"
        android:layout_height="40dp"
        android:hint="搜索名稱"
        android:background="@drawable/btn_search"
        android:layout_marginLeft="10dp"
        android:layout_marginRight="10dp"
        android:layout_marginTop="10dp"
        android:maxLines="1"
        android:maxLength="20"
        android:inputType="text"
        android:drawableLeft="@drawable/search"
        />
    <ListView
        android:id="@+id/listView"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        />
</LinearLayout>

<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android"
    android:shape="rectangle">
    <padding
        android:bottom="5dp"
        android:left="5dp"
        android:right="5dp"
        android:top="5dp" />
    <stroke
        android:width="2dp"
        android:color="@color/blue" />
    <solid android:color="@color/white" />
    <corners android:radius="20dp" />
</shape>

public class SearchAdapter extends BaseAdapter implements Filterable {
    private Context context;
    private ArrayList<Simulation> list = new ArrayList<>();
    private MyFilter filter; //創(chuàng)建MyFilter對(duì)象
    private FilterListener listener = null; //接口對(duì)象

    public SearchAdapter(Context context, ArrayList<Simulation> list, FilterListener listener) {
        this.context = context;
        this.list = list;
        this.listener = listener;
    }

    @Override
    public int getCount() {
        return list.size();
    }

    @Override
    public Object getItem(int position) {
        return list.get(position);
    }

    @Override
    public long getItemId(int position) {
        return position;
    }

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        try {
            final ViewHold hold;
            if (convertView == null) {
                hold = new ViewHold();
                convertView = LayoutInflater.from(context).inflate(R.layout.item_search, null);
                hold.tv_simulation = convertView.findViewById(R.id.tv_simulation);
                convertView.setTag(hold);
            } else {
                hold = (ViewHold) convertView.getTag();
            }
            Simulation simulation = list.get(position);
            hold.tv_simulation.setText(simulation.getText());
        } catch (Exception e) {
            e.printStackTrace();
        }
        return convertView;
    }

    public Filter getFilter() {
        if (filter == null) {
            filter = new MyFilter(list);
        }
        return filter;
    }

    /**
     * 創(chuàng)建內(nèi)部類MyFilter繼承Filter類，并重寫相關(guān)方法，實(shí)現(xiàn)數(shù)據(jù)的過濾
     */
    class MyFilter extends Filter {
        //創(chuàng)建集合保存原始數(shù)據(jù)
        private ArrayList<Simulation> original = new ArrayList<>();

        public MyFilter(ArrayList<Simulation> original) {
            this.original = original;
        }

        //該方法返回搜索過濾后的數(shù)據(jù)
        @Override
        protected FilterResults performFiltering(CharSequence constraint) {
            //創(chuàng)建FilterResults對(duì)象
            FilterResults filterResults = new FilterResults();
            /**
             * 沒有搜索內(nèi)容的話就還是給filterResults賦值原始數(shù)據(jù)的值和大小
             * 執(zhí)行了搜索的話，根據(jù)搜索規(guī)則過濾即可，最后把過濾后的數(shù)據(jù)的值和大小賦值給filterResults
             */
            if (TextUtils.isEmpty(constraint)) {
                //取出當(dāng)前的數(shù)據(jù)源的值和集合元素個(gè)數(shù)
                //此時(shí)返回的filterResults就是原始的數(shù)據(jù)，不進(jìn)行過濾
                filterResults.values = original;
                filterResults.count = original.size();
            } else {
                ArrayList<Simulation> mList = new ArrayList<>();
                //創(chuàng)建集合保護(hù)過濾后的數(shù)據(jù)
                for (Simulation s : original) {
                    //這里的toLowerCase():是將字符串中的字母全部變?yōu)樾?，而非字母則不做改變
                    if (s.getText().trim().toLowerCase().contains(constraint.toString().trim().toLowerCase())) {
                        //規(guī)則匹配的話就往集合中添加該數(shù)據(jù)
                        mList.add(s);
                    }
                }
                filterResults.values = mList;
                filterResults.count = mList.size();
            }
            return filterResults;
        }

        //該方法用來刷新用戶界面，根據(jù)過濾后的數(shù)據(jù)重新展示列表
        @Override
        protected void publishResults(CharSequence constraint, FilterResults results) {
            //獲取過濾后的數(shù)據(jù)
            list = (ArrayList<Simulation>) results.values;
            //如果接口對(duì)象不為空，那么調(diào)用接口中的方法獲取過濾后的數(shù)據(jù)，具體的實(shí)現(xiàn)在new這個(gè)接口的時(shí)候重寫的方法里執(zhí)行
            if (listener != null) {
                listener.getFilterData(list);
            }
            //刷新數(shù)據(jù)源顯示
            //通知數(shù)據(jù)觀察者當(dāng)前所關(guān)聯(lián)的數(shù)據(jù)源已經(jīng)發(fā)生改變，任何與該數(shù)據(jù)有關(guān)的視圖都應(yīng)該去刷新自己。
            notifyDataSetChanged();
        }
    }

    public interface FilterListener{
        void getFilterData(List<Simulation> list);
    }

    public final class ViewHold {
        private TextView tv_simulation;
    }

}

public class SearchBoxActivity extends AppCompatActivity {
    private static final String TAG = "SearchBoxActivity";
    private EditText et_search;
    private ListView listView;
    private SearchAdapter searchAdapter;

    private ArrayList<Simulation> list = new ArrayList<>();

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_search_box);
        et_search = findViewById(R.id.et_search);
        listView = findViewById(R.id.listView);
        String data[] = new String[]{"大數(shù)據(jù)", "Android開發(fā)", "Java開發(fā)", "web前端開發(fā)", "網(wǎng)頁開發(fā)", "IOS開發(fā)"};
        for (int i = 0; i < 6; i++) {
            Simulation simulation = new Simulation(data[i]);
            list.add(simulation);
        }

        searchAdapter = new SearchAdapter(this, list, new SearchAdapter.FilterListener() {
            @Override
            public void getFilterData(List<Simulation> list) {
                //這里可以拿到過濾后的數(shù)據(jù)，所以在這里可以對(duì)搜索后的數(shù)據(jù)進(jìn)行操作
                Log.e(TAG, "接口回調(diào)成功");
                Log.e(TAG, list.toString());
                setItemClick(list);
            }
        });
        //設(shè)置適配器
        listView.setAdapter(searchAdapter);
        //設(shè)置監(jiān)聽
        setListeners();
    }

    private void setListeners() {
        //沒有進(jìn)行搜索的時(shí)候，也要添加對(duì)listView的item單擊監(jiān)聽
        setItemClick(list);
        /**
         * 對(duì)編輯框添加文本改變監(jiān)聽，搜索的具體功能是在這里實(shí)現(xiàn)
         * 文字改變的時(shí)候進(jìn)行搜索，關(guān)鍵方法是重寫onTextChanged()方法
         */
        et_search.addTextChangedListener(new TextWatcher() {
            //每次EditText文本改變之前的時(shí)候，會(huì)回調(diào)這個(gè)方法
            @Override
            public void beforeTextChanged(CharSequence s, int start, int count, int after) {
                //s     輸入框中改變前的字符串信息
                //start 輸入框中改變前的字符串的起始位置
                //count 輸入框中改變前后的字符串改變數(shù)量一般為0
                //after 輸入框中改變后的字符串與起始位置的偏移量
            }
            //每次EditText文本改變的時(shí)候，會(huì)回調(diào)這個(gè)方法
            @Override
            public void onTextChanged(CharSequence s, int start, int before, int count) {
                //第一個(gè)參數(shù)s 的含義: 輸入框中改變后的字符串信息
                //start 輸入框中改變后的字符串的起始位置
                //before 輸入框中改變前的字符串的位置 默認(rèn)為0
                //count 輸入框中改變后的一共輸入字符串的數(shù)量
                if (searchAdapter != null) {
                    searchAdapter.getFilter().filter(s);
                }
            }
            //每次EditText文本改變之后的時(shí)候，會(huì)回調(diào)這個(gè)方法
            @Override
            public void afterTextChanged(Editable s) {
                //edit  輸入結(jié)束呈現(xiàn)在輸入框中的信息
            }
        });
    }

    private void setItemClick(List<Simulation> filter_list) {
        listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
            @Override
            public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
                Toast.makeText(SearchBoxActivity.this, filter_list.get(position).getText(), Toast.LENGTH_SHORT).show();
            }
        });
    }
}