主程序文件
[java]
package com.gaoxueping;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import android.os.Bundle;
import android.app.Activity;
import android.content.ContentValues;
import android.content.Context;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
import android.util.Log;
import android.view.Menu;
import android.view.View;
import android.widget.ListView;
import android.widget.SimpleAdapter;
public class MainActivity extends Activity {
private DBManager mgr;
private ListView listView;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
listView = (ListView) findViewById(R.id.listView);
mgr = new DBManager(this);
}
public void add(View view) {
ArrayList<Person> persons = new ArrayList<Person>();
Person person1 = new Person("Ella", 22, "lively girl");
Person person2 = new Person("Jenny", 22, "beautiful girl");
Person person3 = new Person("Jessica", 23, "sexy girl");
Person person4 = new Person("Kelly", 23, "hot baby");
Person person5 = new Person("Jane", 25, "a pretty woman");
persons.add(person1);
persons.add(person2);
persons.add(person3);
persons.add(person4);
persons.add(person5);
mgr.add(persons);
}
public void query(View view) {
List<Person> persons = mgr.query();
ArrayList<Map<String, String>> list = new ArrayList<Map<String, String>>();
for (Person person : persons) {
HashMap<String, String> map = new HashMap<String, String>();
map.put("name", person.name);
map.put("info", person.age + " years old, " + person.info);
list.add(map);
}
SimpleAdapter adapter = new SimpleAdapter(this, list,
android.R.layout.simple_list_item_2, new String[] { "name",
"info" }, new int[] { android.R.id.text1,
android.R.id.text2 });
listView.setAdapter(adapter);
}
@Override
protected void onDestroy() {
// TODO Auto-generated method stub
super.onDestroy();
mgr.closeDB();
}
@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;
}
}
[/java]
DBManager.java
[java]
package com.gaoxueping;
import java.util.ArrayList;
import java.util.List;
import android.content.Context;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
public class DBManager {
private DBHelper helper;
private SQLiteDatabase db;
public DBManager(Context context){
helper = new DBHelper(context);
db = helper.getWritableDatabase();
}
public void add(List<Person> persons){
db.beginTransaction();
try{
for(Person person : persons){
db.execSQL("INSERT INTO person VALUES(null, ?, ?, ?)", new Object[]{person.name, person.age, person.info});
}
db.setTransactionSuccessful();
} finally{
db.endTransaction();
}
}
public List<Person> query(){
ArrayList<Person> persons = new ArrayList<Person>();
Cursor c = queryCursor();
while(c.moveToNext()){
Person person = new Person();
person._id = c.getInt(c.getColumnIndex("_id"));
person.name = c.getString(c.getColumnIndex("name"));
person.age = c.getInt(c.getColumnIndex("age"));
person.info = c.getString(c.getColumnIndex("info"));
persons.add(person);
}
return persons;
}
public Cursor queryCursor(){
Cursor c = db.rawQuery("SELECT * FROM person", null);
return c;
}
public void closeDB(){
db.close();
}
}
[/java]
DBHelper.java
[java]
package com.gaoxueping;
import android.content.Context;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteDatabase.CursorFactory;
import android.database.sqlite.SQLiteOpenHelper;
public class DBHelper extends SQLiteOpenHelper {
private static final String DATABASE_NAME = "haha.db";
private static final int DATABASE_VERSION = 1;
public DBHelper(Context context) {
super(context, DATABASE_NAME, null, DATABASE_VERSION);
// TODO Auto-generated constructor stub
}
@Override
public void onCreate(SQLiteDatabase db) {
// TODO Auto-generated method stub
db.execSQL("CREATE TABLE IF NOT EXISTS person" +
"(_id INTEGER PRIMARY KEY AUTOINCREMENT, name VARCHAR, age INTEGER, info TEXT)");
}
@Override
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
// TODO Auto-generated method stub
db.execSQL("ALTER TABLE person ADD COLUMN other STRING");
}
}
[/java]
Person.java
[java]
package com.gaoxueping;
public class Person {
public int _id;
public String name;
public int age;
public String info;
public Person(){};
public Person(String name, int age, String info){
this.name = name;
this.age = age;
this.info = info;
}
}
[/java]
布局文件
[xml]
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent">
<Button
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="add"
android:onClick="add"/>
<Button
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="update"
android:onClick="update"/>
<Button
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="delete"
android:onClick="delete"/>
<Button
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="query"
android:onClick="query"/>
<Button
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="queryTheCursor"
android:onClick="queryTheCursor"/>
<ListView
android:id="@+id/listView"
android:layout_width="fill_parent"
android:layout_height="wrap_content"/>
</LinearLayout>
[/xml]
完整项目下载地址
http://pan.baidu.com/s/1pJ146CV
