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本文實(shí)例為大家分享了Android數(shù)據(jù)庫(kù)操作工具類的具體代碼,供大家參考,具體內(nèi)容如下
HistoryDAO
public class HistoryDAO { private DBConnection dbc = null; private SQLiteDatabase db = null; private Context context; //數(shù)據(jù)庫(kù)上下文 public HistoryDAO(Context context) { this.context = context; } //打開數(shù)據(jù)庫(kù) public HistoryDAO open() { dbc = new DBConnection(context); db = dbc.getWritableDatabase(); return this; } //關(guān)閉數(shù)據(jù)庫(kù) public void closeAll() { db.close(); dbc.close(); } // // 增加 // public void add(Search_HistoryData data, String type) { // open(); // ContentValues values = new ContentValues(); // values.put("content", data.getContent()); // values.put("type", data.getType()); // db.insert("history", null, values); // closeAll(); // } // 增加 public void add(Search_HistoryData data, String tableName) { open(); ContentValues values = new ContentValues(); values.put("content", data.getContent()); db.insert(tableName, null, values); closeAll(); } // 增加 工具類的最后五個(gè)專用 public void addLawTool(Search_HistoryData data, String tableName) { open(); ContentValues values = new ContentValues(); values.put("content", data.getContent()); values.put("_id", data.getId()); db.insert(tableName, null, values); closeAll(); } // 全查詢 public List getAll(String TableName) { open(); List ar = new ArrayList(); Cursor c = db.rawQuery("select * from " + TableName, null); while (c.moveToNext()) { Map map = new HashMap(); map.put("_id", c.getInt(c.getColumnIndex("_id"))); map.put("content", c.getString(c.getColumnIndex("content"))); ar.add(map); } closeAll(); return ar; } // 刪除 根據(jù)id刪除 public void delete(String tableName, int uid) { open(); db.delete("history", "uid=" + uid, null); closeAll(); } //清空表中所有數(shù)據(jù) public void delete(String tableName) { open(); db.delete(tableName, null, null); closeAll(); } //判斷是否存在 public boolean searchResult(String tableName, String key) { open(); Boolean booleans = db.rawQuery("select * from " + tableName + " where content = ?", new String[]{key}).moveToNext(); closeAll(); return booleans; } //根據(jù)庫(kù)查詢表字段 public boolean searchResultToType(String content, String type) { open(); Boolean booleans = db.rawQuery("select * from history where content = ? and type = ?", new String[]{content, type}).moveToNext(); closeAll(); return booleans; } }
以上就是本文的全部?jī)?nèi)容,希望對(duì)大家的學(xué)習(xí)有所幫助,也希望大家多多支持億速云。
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