import android.content.Context;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteOpenHelper;

public class DBOpenHelper extends SQLiteOpenHelper {

	public DBOpenHelper(Context context) {
		super(context, "people.db", null, 1);
	}

	@Override
	public void onCreate(SQLiteDatabase db) {
		//建立人員表
		db.execSQL("drop table if exists people");
		db.execSQL("create table people (id integer primary key autoincrement,name varchar(64),sex smallint,contact varchar(64))");
	}

	@Override
	public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {

	}

}

 

import java.util.ArrayList;
import java.util.List;

import android.content.ContentValues;
import android.content.Context;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;

import com.text.people.People;
import com.text.people.StrUtil;

public class PeopleService {
	private DBOpenHelper dbOpenHelper;
	private static PeopleService instance = null;

	public PeopleService(Context context) {
		this.dbOpenHelper = new DBOpenHelper(context);
	}

	public synchronized static PeopleService getInstance(Context ctx) {
		if (null == instance) {
			instance = new PeopleService(ctx);
		}
		return instance;
	}
	
	//增加資料
	public void save(People people) {
		SQLiteDatabase db = dbOpenHelper.getWritableDatabase();
		ContentValues values = new ContentValues();
		values.put("name", people.getName());
		values.put("sex", people.getSex());
		values.put("contact", people.getContact());
		db.insert("people", null, values);
	}

	//根據id刪除日誌
	public void delete(Integer id) {
		SQLiteDatabase db = dbOpenHelper.getWritableDatabase();
		db.delete("people", "id=?", new String[] { id.toString() });
	}

	//刪除所有資料
	public void deleteAll() {
		SQLiteDatabase db = dbOpenHelper.getWritableDatabase();
		db.delete("people", "", null);
	}

	//根據id修改資料
	public void update(People people) {
		SQLiteDatabase db = dbOpenHelper.getWritableDatabase();
		ContentValues values = new ContentValues();
		values.put("name", people.getName());
		values.put("sex", people.getSex());
		values.put("contact", people.getContact());
		db.update("people", values, "id=?", new String[] { people.getId().toString() });
	}

	//根據id查詢單條資料
	public People find(Integer id) {
		SQLiteDatabase db = dbOpenHelper.getReadableDatabase();
		Cursor cursor = db.query("people",new String[] { "id,name,sex,contact" },
						"id=?", new String[] { id.toString() }, null, null,
						null, "1");
		try {
			if (cursor.moveToFirst()) {
				People people = new People();
				people.setId(id);
				people.setName(cursor.getString(cursor.getColumnIndex("name")));
				people.setSex(cursor.getInt(cursor.getColumnIndex("sex")));
				people.setContact(cursor.getString(cursor.getColumnIndex("contact")));
				return people;
			}
			return null;
		} finally {
			cursor.close();
		}
	}

	//分頁載入資料
	public List<People> getScrollData(int currentPage, int lineSize,String whereStr) {
		String firstResult = String.valueOf((currentPage - 1) * lineSize);
		SQLiteDatabase db = dbOpenHelper.getReadableDatabase();
		Cursor cursor = null;
		try {
			if(StrUtil.isNull(whereStr)){
				cursor = db.query("people",
						new String[] { "id,name,sex,contact" },
						null, null, null, null, "id desc",
						firstResult + "," + lineSize);
			}else{
				cursor = db.query("people",
						new String[] { "id,name,sex,contact" },
						"name like ? or contact like ?", new String[]{"%"+whereStr+"%","%"+whereStr+"%"}, null, null, "id desc",
						firstResult + "," + lineSize);
			}
			List<People> peoples = new ArrayList<People>();
			while (cursor.moveToNext()) {
				People people = new People();
				people.setId(cursor.getInt(cursor.getColumnIndex("id")));
				people.setName(cursor.getString(cursor.getColumnIndex("name")));
				people.setSex(cursor.getInt(cursor.getColumnIndex("sex")));
				people.setContact(cursor.getString(cursor.getColumnIndex("contact")));
				peoples.add(people);
			}
			return peoples;
		} finally {
			if(cursor!=null){
				cursor.close();
			}
		}
	}

	//查詢總記錄數
	public int getCount() {
		SQLiteDatabase db = dbOpenHelper.getReadableDatabase();
		Cursor cursor = db.rawQuery("select count(1) from people", null);
		try {
			cursor.moveToFirst();
			return cursor.getInt(0);
		} finally {
			cursor.close();
		}
	}
}