主要就是创建数据库，添加、查询、更新、删除这几项。

package com.wr.sqlite;

import android.content.Context;

import android.database.sqlite.sqliteDatabase;

import android.database.sqlite.sqliteDatabase.CursorFactory;

import android.database.sqlite.sqliteOpenHelper;

import android.widget.Toast;

public class MyDatebaseHelper extends sqliteOpenHelper {

public static final String CREATE_BOOK = "create table Book ("

+ "id integer primary key autoincrement," + "author text,"

+ "price real," + "pages integer," + "name text) ";

public static final String CREATE_CATEGORY = "create table Category ("

+ "id integer primary key autoincrement," + "category_name text,"

+ "category_code integer) ";

private Context mContext;

public MyDatebaseHelper(Context context,String name,CursorFactory factory,int version) {

super(context,name,factory,version);

mContext = context;

// TODO Auto-generated constructor stub

}

@Override

public void onCreate(sqliteDatabase db) {

// TODO Auto-generated method stub

db.execsql(CREATE_BOOK);

db.execsql(CREATE_CATEGORY);

Toast.makeText(mContext,"Create succeeded",Toast.LENGTH_SHORT).show();

}

@Override

public void onUpgrade(sqliteDatabase db,int oldVersion,int newVersion) {

// TODO Auto-generated method stub

switch (oldVersion) {

case 1:

db.execsql(CREATE_CATEGORY);

case 2:

db.execsql("alter table Book add column category_id integer");

}

}

}

这里将见表语句定义成了字符串，在哦你Create()方法中建表。

android:layout_width="match_parent"

android:layout_height="match_parent"

android:orientation="vertical" >

android:id="@+id/create_database"

android:layout_width="match_parent"

android:layout_height="wrap_content"

android:text="Create database" />

android:id="@+id/add_data"

android:layout_width="match_parent"

android:layout_height="wrap_content"

android:text="Add date" />

android:id="@+id/update_data"

android:layout_width="match_parent"

android:layout_height="wrap_content"

android:text="Update date" />

android:id="@+id/delete_data"

android:layout_width="match_parent"

android:layout_height="wrap_content"

android:text="Delete date" />

android:id="@+id/query_data"

android:layout_width="match_parent"

android:layout_height="wrap_content"

android:text="Query date" />

android:id="@+id/replace_data"

android:layout_width="match_parent"

android:layout_height="wrap_content"

android:text="Replace date" />

最后在MainActiity中，实现一系列的操作。MainActivity.java

package com.wr.sqlite;

import android.app.Activity;

import android.content.ContentValues;

import android.database.Cursor;

import android.database.sqlite.sqliteDatabase;

import android.os.Bundle;

import android.util.Log;

import android.view.Menu;

import android.view.MenuItem;

import android.view.View;

import android.view.View.OnClickListener;

import android.widget.Button;

public class MainActivity extends Activity {

private MyDatebaseHelper dbHelper;

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

dbHelper = new MyDatebaseHelper(this,"BookStore.db",null,2);

Button createDatabase = (Button) findViewById(R.id.create_database);

createDatabase.setOnClickListener(new OnClickListener() {

@Override

public void onClick(View v) {

// TODO Auto-generated method stub

dbHelper.getWritableDatabase();

}

});

Button addData = (Button) findViewById(R.id.add_data);

addData.setOnClickListener(new OnClickListener() {

@Override

public void onClick(View v) {

// TODO Auto-generated method stub

sqliteDatabase db = dbHelper.getWritableDatabase();

ContentValues values = new ContentValues();

values.put("name","The Da Vinci Code");

values.put("author","Dan Brown");

values.put("pages",454);

values.put("price",16.96);

db.insert("Book",values);

values.clear();

values.put("name","The Lost Sysbol");

values.put("author",510);

values.put("price",19.95);

db.insert("Book",values);

}

});

Button updateData = (Button) findViewById(R.id.update_data);

updateData.setOnClickListener(new OnClickListener() {

@Override

public void onClick(View arg0) {

// TODO Auto-generated method stub

sqliteDatabase db = dbHelper.getWritableDatabase();

ContentValues values = new ContentValues();

values.put("price",10.99);

db.update("Book",values,"name = ?",new String[] { "The Da Vinci Code" });

}

});

Button deleteData = (Button) findViewById(R.id.delete_data);

deleteData.setOnClickListener(new OnClickListener() {

@Override

public void onClick(View arg0) {

// TODO Auto-generated method stub

sqliteDatabase db = dbHelper.getWritableDatabase();

db.delete("Book","pages > ?",new String[] { "500" });

}

});

Button queryData = (Button) findViewById(R.id.query_data);

queryData.setOnClickListener(new OnClickListener() {

@Override

public void onClick(View arg0) {

// TODO Auto-generated method stub

sqliteDatabase db = dbHelper.getWritableDatabase();

Cursor cursor = db.query("Book",null);

if (cursor.moveToFirst()) {

do {

String name = cursor.getString(cursor

.getColumnIndex("name"));

String author = cursor.getString(cursor

.getColumnIndex("author"));

int pages = cursor.getInt(cursor

.getColumnIndex("pages"));

double price = cursor.getDouble(cursor

.getColumnIndex("price"));

Log.d("MainActivity","book name is " + name);

Log.d("MainActivity","book author is " + author);

Log.d("MainActivity","book pages is " + pages);

Log.d("MainActivity","book price is " + price);

} while (cursor.moveToNext());

}

cursor.close();

}

});

Button replaceData = (Button) findViewById(R.id.replace_data);

replaceData.setOnClickListener(new OnClickListener() {

@Override

public void onClick(View arg0) {

// TODO Auto-generated method stub

sqliteDatabase db = dbHelper.getWritableDatabase();

db.beginTransaction();

try {

db.delete("Book",null);

ContentValues values = new ContentValues();

values.put("name","Game of Thrones");

values.put("author","George Martin");

values.put("pages","720");

values.put("price",20.85);

db.insert("Book",values);

db.setTransactionSuccessful();

} catch (Exception e) {

e.printStackTrace();

} finally {

db.endTransaction();

}

}

});

}

@Override

public boolean onCreateOptionsMenu(Menu menu) {

// Inflate the menu; this adds items to the action bar if it is present.

getMenuInflater().inflate(R.menu.main,menu);

return true;

}

@Override

public boolean onOptionsItemSelected(MenuItem item) {

// Handle action bar item clicks here. The action bar will

// automatically handle clicks on the Home/Up button,so long

// as you specify a parent activity in AndroidManifest.xml.

int id = item.getItemId();

if (id == R.id.action_settings) {

return true;

}

return super.onOptionsItemSelected(item);

}

}

这其中也包含了事物的使用。比较具体。