安卓 本地實現搜尋歷史記錄
阿新 • • 發佈：2019-02-07
本地實現搜尋歷史記錄有很多種方法，下面不多說了，我們來用SQLite來實現此功能，直接上完整程式碼：點選下載原始碼
1.MainActivity主函式
package com.example.administrator.searchapplication; import android.support.v7.app.AppCompatActivity; import android.os.Bundle; import android.text.Editable; import android.text.TextWatcher; import android.view.KeyEvent; import android.view.LayoutInflater; import android.view.View; import android.view.inputmethod.EditorInfo; import android.widget.AdapterView; import android.widget.EditText; import android.widget.LinearLayout; import android.widget.ListView; import android.widget.TextView; import android.widget.Toast; import java.util.ArrayList; import java.util.List; public class MainActivity extends AppCompatActivity implements View.OnClickListener{ private EditText searchContentEt; private SearchRecordsAdapter recordsAdapter; private View recordsHistoryView; private ListView recordsListLv; private TextView clearAllRecordsTv; private LinearLayout searchRecordsLl; private List<String> searchRecordsList; private List<String> tempList; private RecordsDao recordsDao; private TextView tv_history; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); initView(); initData(); bindAdapter(); initListener(); } private void initView() { // setHideHeader(); initRecordsView(); searchRecordsLl = (LinearLayout) findViewById(R.id.search_content_show_ll); searchContentEt = (EditText) findViewById(R.id.input_search_content_et); tv_history = (TextView) findViewById(R.id.tv_history); //新增搜尋view searchRecordsLl.addView(recordsHistoryView); } //初始化搜尋歷史記錄View private void initRecordsView() { recordsHistoryView = LayoutInflater.from(this).inflate(R.layout.search_lishi, null); //顯示歷史記錄lv recordsListLv = (ListView) recordsHistoryView.findViewById(R.id.search_records_lv); //清除搜尋歷史記錄 clearAllRecordsTv = (TextView) recordsHistoryView.findViewById(R.id.clear_all_records_tv); } private void initData() { recordsDao = new RecordsDao(this); searchRecordsList = new ArrayList<>(); tempList = new ArrayList<>(); tempList.addAll(recordsDao.getRecordsList()); reversedList(); //第一次進入判斷資料庫中是否有歷史記錄，沒有則不顯示 checkRecordsSize(); } private void bindAdapter() { recordsAdapter = new SearchRecordsAdapter(this, searchRecordsList); recordsListLv.setAdapter(recordsAdapter); } private void initListener() { clearAllRecordsTv.setOnClickListener(this); searchContentEt.setOnEditorActionListener(new TextView.OnEditorActionListener() { @Override public boolean onEditorAction(TextView v, int actionId, KeyEvent event) { if (actionId == EditorInfo.IME_ACTION_SEARCH) { if (searchContentEt.getText().toString().length() > 0) { String record = searchContentEt.getText().toString(); //判斷資料庫中是否存在該記錄 // if (!recordsDao.isHasRecord(record)) { // tempList.add(record); // } //將搜尋記錄儲存至資料庫中 recordsDao.addRecords(record); // reversedList(); // checkRecordsSize(); // recordsAdapter.notifyDataSetChanged(); Toast.makeText(MainActivity.this, "11",Toast.LENGTH_SHORT).show(); //根據關鍵詞去搜索 } else { Toast.makeText(MainActivity.this, "搜尋內容不能為空",Toast.LENGTH_SHORT).show(); } } return false; } }); //根據輸入的資訊去模糊搜尋 searchContentEt.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) { if (s.toString().trim().length() == 0) { tv_history.setText("搜尋歷史"); } else { tv_history.setText("搜尋結果"); } String tempName = searchContentEt.getText().toString(); tempList.clear(); tempList.addAll(recordsDao.querySimlarRecord(tempName)); reversedList(); checkRecordsSize(); recordsAdapter.notifyDataSetChanged(); } }); //歷史記錄點選事件 recordsListLv.setOnItemClickListener(new AdapterView.OnItemClickListener() { @Override public void onItemClick(AdapterView<?> parent, View view, int position, long id) { //將獲取到的字串傳到搜尋結果介面 //點選後搜尋對應條目內容 // searchContentEt.setText(searchRecordsList.get(position)); Toast.makeText(MainActivity.this,searchRecordsList.get(position)+"",Toast.LENGTH_SHORT).show(); searchContentEt.setSelection(searchContentEt.length()); } }); } //當沒有匹配的搜尋資料的時候不顯示歷史記錄欄 private void checkRecordsSize(){ if(searchRecordsList.size() == 0){ searchRecordsLl.setVisibility(View.GONE); }else{ searchRecordsLl.setVisibility(View.VISIBLE); } } @Override public void onClick(View v) { switch (v.getId()){ //清空所有歷史資料 case R.id.clear_all_records_tv: tempList.clear(); reversedList(); recordsDao.deleteAllRecords(); recordsAdapter.notifyDataSetChanged(); searchRecordsLl.setVisibility(View.GONE); searchContentEt.setHint("請輸入你要搜尋的內容"); break; } } //顛倒list順序，使用者輸入的資訊會從上依次往下顯示 private void reversedList(){ searchRecordsList.clear(); for(int i = tempList.size() - 1 ; i >= 0 ; i --) { searchRecordsList.add(tempList.get(i)); } } }
2.SearchRecordsAdapter介面卡
package com.example.administrator.searchapplication; /** * Created by Administrator on 2018/2/11. */ import android.content.Context; import android.view.LayoutInflater; import android.view.View; import android.view.ViewGroup; import android.widget.BaseAdapter; import android.widget.TextView; import java.util.List; /** * Created by 05 on 2016/7/27. */ public class SearchRecordsAdapter extends BaseAdapter { private Context context; private List<String> searchRecordsList; private LayoutInflater inflater; public SearchRecordsAdapter(Context context, List<String> searchRecordsList) { this.context = context; this.searchRecordsList = searchRecordsList; inflater = LayoutInflater.from(context); } @Override public int getCount() { //設定listView的顯示條目數量為5 return searchRecordsList.size() > 5 ? 5 : searchRecordsList.size(); } @Override public Object getItem(int position) { return searchRecordsList.size() == 0 ? null : searchRecordsList.get(position); } @Override public long getItemId(int position) { return position; } @Override public View getView(int position, View convertView, ViewGroup parent) { ViewHolder viewHolder; if(null == convertView){ viewHolder = new ViewHolder(); convertView = inflater.inflate(R.layout.list_item,null); viewHolder.recordTv = (TextView) convertView.findViewById(R.id.search_content_tv); convertView.setTag(viewHolder); }else{ viewHolder = (ViewHolder) convertView.getTag(); } String content = searchRecordsList.get(position); viewHolder.recordTv.setText(content); return convertView; } private class ViewHolder { TextView recordTv; } }
3.RecordSQLiteOpenHelper
package com.example.administrator.searchapplication; /** * Created by Administrator on 2018/2/11. */ import android.content.Context; import android.database.sqlite.SQLiteDatabase; import android.database.sqlite.SQLiteOpenHelper; /** * 搜尋記錄幫助類 * Created by 05 on 2016/7/27. */ public class RecordSQLiteOpenHelper extends SQLiteOpenHelper { private final static String DB_NAME = "temp.db"; private final static int DB_VERSION = 1; public RecordSQLiteOpenHelper(Context context) { super(context, DB_NAME, null, DB_VERSION); } @Override public void onCreate(SQLiteDatabase db) { String sqlStr = "CREATE TABLE IF NOT EXISTS records (_id INTEGER PRIMARY KEY AUTOINCREMENT, name TEXT);"; db.execSQL(sqlStr); } @Override public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) { } }
4.RecordsDao
package com.example.administrator.searchapplication;
/**
* Created by Administrator on 2018/2/11.
*/
import android.content.ContentValues;
import android.content.Context;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
import java.util.ArrayList;
import java.util.List;
/**
* 搜尋記錄操作類
* Created by 05 on 2016/7/27.
*/
public class RecordsDao {
RecordSQLiteOpenHelper recordHelper;
SQLiteDatabase recordsDb;
public RecordsDao(Context context) {
recordHelper = new RecordSQLiteOpenHelper(context);
}
//新增搜尋記錄
public void addRecords(String record) {
if (!isHasRecord(record)) {
recordsDb = recordHelper.getReadableDatabase();
ContentValues values = new ContentValues();
values.put("name", record);
//新增
recordsDb.insert("records", null, values);
//關閉
recordsDb.close();
}
}
//判斷是否含有該搜尋記錄
public boolean isHasRecord(String record) {
boolean isHasRecord = false;
recordsDb = recordHelper.getReadableDatabase();
Cursor cursor = recordsDb.query("records", null, null, null, null, null, null);
while (cursor.moveToNext()) {
if (record.equals(cursor.getString(cursor.getColumnIndexOrThrow("name")))) {
isHasRecord = true;
}
}
//關閉資料庫
recordsDb.close();
cursor.close();
return isHasRecord;
}
//獲取全部搜尋記錄
public List<String> getRecordsList() {
List<String> recordsList = new ArrayList<>();
recordsDb = recordHelper.getReadableDatabase();
Cursor cursor = recordsDb.query("records", null, null, null, null, null, null);
while (cursor.moveToNext()) {
String name = cursor.getString(cursor.getColumnIndexOrThrow("name"));
recordsList.add(name);
}
//關閉資料庫
recordsDb.close();
cursor.close();
return recordsList;
}
//模糊查詢
public List<String> querySimlarRecord(String record){
String queryStr = "select * from records where name like '%" + record + "%' order by name ";
List<String> similarRecords = new ArrayList<>();
Cursor cursor= recordHelper.getReadableDatabase().rawQuery(queryStr,null);
while (cursor.moveToNext()) {
String name = cursor.getString(cursor.getColumnIndexOrThrow("name"));
similarRecords.add(name);
}
cursor.close();
return similarRecords;
}
//清空搜尋記錄
public void deleteAllRecords() {
recordsDb = recordHelper.getWritableDatabase();
recordsDb.execSQL("delete from records");
recordsDb.close();
}
// 刪除
public int delete(int _id) {
SQLiteDatabase db = recordHelper.getWritableDatabase();
int d = db.delete("records", "_id=?", new String[] { _id + "" });
db.close();
return d;
}
}
5.主函式佈局
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="50dp">
<LinearLayout
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight="1">
<ImageView
android:layout_width="30dp"
android:layout_height="match_parent"
android:layout_gravity="center_vertical"
android:padding="5dp"
android:src="@mipmap/ic_launcher" />
<EditText
android:id="@+id/input_search_content_et"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:hint="請輸入你要搜尋的內容"
android:imeOptions="actionSearch"
android:singleLine="true"
/>
<!-- 以上的singleLine和imeOptions屬性程式碼是將彈出的軟鍵盤的回車鍵替換成搜尋鍵的關鍵，當然也可以換成傳送鍵 等等，可以去查一下該屬性 -->
</LinearLayout>
<TextView
android:id="@+id/search_content_cancel_tv"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:layout_gravity="center_vertical"
android:gravity="center"
android:padding="10dp"
android:text="取消"
android:textSize="18sp" />
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:orientation="vertical"
android:gravity="center|left"
android:layout_height="30dp">
<TextView
android:id="@+id/tv_history"
android:layout_width="wrap_content"
android:layout_marginLeft="20dp"
android:text="搜尋歷史"
android:layout_height="wrap_content" />
</LinearLayout>
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="match_parent">
<LinearLayout
android:id="@+id/search_content_show_ll"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical"></LinearLayout>
</RelativeLayout>
</LinearLayout>6.介面卡佈局
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical" android:layout_width="match_parent"
android:layout_height="match_parent">
<LinearLayout
android:orientation="horizontal"
android:layout_width="match_parent"
android:layout_height="40dp">
<TextView
android:id="@+id/search_content_tv"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:drawableLeft="@mipmap/ic_launcher_round"
android:drawablePadding="8dp"
android:layout_margin="10dp"
android:layout_gravity="center_vertical"
/>
</LinearLayout>
</LinearLayout>7.搜尋佈局
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical" android:layout_width="match_parent"
android:layout_height="match_parent">
<LinearLayout
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="wrap_content">
<ListView
android:id="@+id/search_records_lv"
android:layout_width="match_parent"
android:layout_height="wrap_content"/>
<View
android:layout_width="match_parent"
android:layout_height="0.1dp"
android:background="@color/colorAccent"/>
<TextView
android:background="@color/colorPrimary"
android:id="@+id/clear_all_records_tv"
android:layout_width="match_parent"
android:layout_height="40dp"
android:textSize="16sp"
android:gravity="center"
android:text="清除歷史記錄"/>
<View
android:layout_width="match_parent"
android:layout_height="0.1dp"
android:background="@color/colorAccent"/>
</LinearLayout>
</LinearLayout>