Android SQLite数据操作

main.xml文件:

01 <?xml version="1.0" encoding="utf-8"?>
02 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
03     android:orientation="vertical"
04     android:layout_width="fill_parent"
05     android:layout_height="fill_parent"
06     >
07 <Button
08     android:layout_width="fill_parent"
09     android:layout_height="wrap_content"
10     android:id="@+id/create"
11     android:text="创建数据库"
12     />
13 <Button
14     android:layout_width="fill_parent"
15     android:layout_height="wrap_content"
16     android:id="@+id/upgrade"
17     android:text="更新数据库"
18     />
19 <Button
20     android:layout_width="fill_parent"
21     android:layout_height="wrap_content"
22     android:id="@+id/insert"
23     android:text="插入数据"
24     />
25 <Button
26     android:layout_width="fill_parent"
27     android:layout_height="wrap_content"
28     android:id="@+id/update"
29     android:text="修改数据"
30     />
31 <Button
32     android:layout_width="fill_parent"
33     android:layout_height="wrap_content"
34     android:id="@+id/select"
35     android:text="查询数据"
36     />
37 </LinearLayout>

继承自SQLiteOpenHelper的MyOpenHleper类: 

01 package com.android.danny.hleper;
02
03 import android.content.Context;
04 import android.database.sqlite.SQLiteDatabase;
05 import android.database.sqlite.SQLiteOpenHelper;
06
07 public class MyOpenHleper extends SQLiteOpenHelper {
08
09     public static final int VERSION =1;
10
11     public MyOpenHleper(Context context, String name) {
12         super(context, name, null, VERSION);
13         // TODO Auto-generated constructor stub
14     }
15
16     public MyOpenHleper(Context context, String name,int ver) {
17         super(context, name, null, ver);
18         // TODO Auto-generated constructor stub
19     }
20     @Override
21     public void onCreate(SQLiteDatabase db) {
22         System.out.println("------Create Database----");
23         db.execSQL("CREATE TABLE person (id int ,name varchar(20))");
24     }
25
26     @Override
27     public void onUpgrade(SQLiteDatabase arg0, int arg1, int arg2) {
28         // TODO Auto-generated method stub
29         System.out.println("------Upgrade Database----");
30     }
31
32 }

SQLite数据操作类: 

01 package com.android.danny.db;
02
03 import com.android.danny.hleper.MyOpenHleper;
04
05 import android.app.Activity;
06 import android.content.ContentValues;
07 import android.database.Cursor;
08 import android.database.sqlite.SQLiteDatabase;
09 import android.os.Bundle;
10 import android.view.View;
11 import android.view.View.OnClickListener;
12 import android.widget.Button;
13
14 public class Sqlite3 extends Activity implements OnClickListener{
15
16     Button create;
17     Button upgrade;
18     Button insert;
19     Button update;
20     Button select;
21
22     @Override
23     public void onCreate(Bundle savedInstanceState) {
24         super.onCreate(savedInstanceState);
25         setContentView(R.layout.main);
26
27         create = (Button)findViewById(R.id.create);
28         upgrade = (Button)findViewById(R.id.upgrade);
29         insert = (Button)findViewById(R.id.insert);
30         update = (Button)findViewById(R.id.update);
31         select = (Button)findViewById(R.id.select);
32
33         create.setOnClickListener(this);
34         upgrade.setOnClickListener(this);