ListActivity+sqlite+SimpleCursorAdapter简单实例

下面是一个简单实例，主要演示ListActivity+sqlite+SimpleCursorAdapter的用法。

实例打包下载：http://download.csdn.net/detail/yang_hui1986527/4419708

DBHelper.java

package com.example.sqlitedemo.db;

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

public class DBHelper extends SQLiteOpenHelper {

	/**
	 * 数据库名称
	 */
	private static final String DATABASE_NAME = "test.db";  
	
	/**
	 * 数据库版本
	 */
	private static final int DATABASE_VERSION = 1;  

	/**
	 * 表格名称
	 */
	public static final String TABLE_NAME = "profile";
	
	/**
	 * 列表一，_ID，自动增加
	 */
	public static final String COLUMN_ID = "_id";
	
	/**
	 * 列表二，名称
	 */
	public static final String COLUMN_NAME = "name";
	
	public DBHelper(Context context) {
		super(context, DATABASE_NAME, null, DATABASE_VERSION);
	}


	@Override
	public void onCreate(SQLiteDatabase db)  throws SQLException {
		//创建表格
		db.execSQL("CREATE TABLE IF NOT EXISTS "+ TABLE_NAME + "("+ COLUMN_ID +" INTEGER PRIMARY KEY AUTOINCREMENT," + COLUMN_NAME +" VARCHAR NOT NULL);");
	}

	@Override
	public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion)  throws SQLException {
		//删除并创建表格
		db.execSQL("DROP TABLE IF EXISTS "+ TABLE_NAME+";");
		onCreate(db);
	}
}

MainActivity.java

package com.example.sqlitedemo;

import android.app.ListActivity;
import android.content.ContentValues;
import android.database.Cursor;
import android.database.SQLException;
import android.database.sqlite.SQLiteDatabase;
import android.os.Bundle;
import android.view.Menu;
import android.widget.SimpleCursorAdapter;

import com.example.sqlitedemo.db.DBHelper;

public class MainActivity extends ListActivity {
	private DBHelper helper = null;  
	private SQLiteDatabase db = null;  
	private SimpleCursorAdapter adapter= null;
	private Cursor mCursor = null;

	@Override
	public void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		initData();
		initAdapter();
	}

	public void initData(){
		//获取数据库
		helper = new DBHelper(this);
		db = helper.getReadableDatabase();

		//插入数据
		try {
			insert("zhang san");
			insert("li si");
			insert("wang wu");
			insert("chen liu");
			insert("zhang san");
			insert("li si");
			insert("wang wu");
			insert("chen liu");
		} catch (SQLException e) {
			e.printStackTrace();
		}
	}

	
	public void initAdapter(){
		//查询表格，并获得Cursor
		mCursor = db.query(DBHelper.TABLE_NAME, new String[]{DBHelper.COLUMN_ID,DBHelper.COLUMN_NAME}, null, null, null, null, null);
		
		//设置adapter
		adapter = new SimpleCursorAdapter(this, android.R.layout.simple_list_item_2, mCursor, new String[]{DBHelper.COLUMN_ID,DBHelper.COLUMN_NAME}, new int[]{android.R.id.text1,android.R.id.text2});
		setListAdapter(adapter);
	}

	public void insert(String name) throws SQLException {
		ContentValues values = new ContentValues();
		values.put(DBHelper.COLUMN_NAME, name);
		db.insertOrThrow(DBHelper.TABLE_NAME, null, values);
	}

	@Override
	public boolean onCreateOptionsMenu(Menu menu) {
		getMenuInflater().inflate(R.menu.activity_main, menu);
		return true;
	}


}

预览效果：