73 lines
1.8 KiB
Java
73 lines
1.8 KiB
Java
package com.hty.daycount;
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import android.content.ContentValues;
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import android.content.Context;
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import android.database.Cursor;
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import android.database.sqlite.SQLiteDatabase;
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import android.database.sqlite.SQLiteOpenHelper;
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public class DBHelper extends SQLiteOpenHelper {
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public static final String DATABASE_NAME = "event.db";
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private final static int VERSION = 1;
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static String TableName = "event";
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private SQLiteDatabase db;
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private static DBHelper mInstance = null;
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public DBHelper(Context context) {
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super(context, DATABASE_NAME, null, VERSION);
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}
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public static synchronized DBHelper getInstance(Context context) {
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if (mInstance == null) {
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mInstance = new DBHelper(context);
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}
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return mInstance;
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}
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@Override
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public void onCreate(SQLiteDatabase db) {
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this.db = db;
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db.execSQL("CREATE TABLE "+ TableName + " (_id INTEGER PRIMARY KEY , time INTEGER, event TEXT)");
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}
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@Override
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public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
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// db.execSQL("DROP TABLE IF EXISTS battery");
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// onCreate(db);
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switch (newVersion) {
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case 2:
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break;
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}
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}
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public void insert(ContentValues values) {
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db = getWritableDatabase();
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db.insert(TableName, null, values);
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db.close();
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}
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public Cursor query(String s) {
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db = getWritableDatabase();
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Cursor c;
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if (s.equals("")) {
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c = db.query(TableName, null, null, null, null, null, "time desc");
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} else {
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c = db.query(TableName, null, "event LIKE '%" + s + "%'", null, null, null, "time desc");
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}
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return c;
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}
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public void del(String id) {
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if (db == null)
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db = getWritableDatabase();
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db.delete(TableName, "_id=?", new String[] { id });
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// Log.e("id", id + "");
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// db.ExecuteNonQuery(CommandType.Text, "VACUUM");
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}
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@Override
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public void close() {
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if (db != null)
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db.close();
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}
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} |