Android SQLite简单操作示例

环境

Eclipse Indigo + Android 2.2 + SQLite 2.6.22

 

问题

Android SQLite数据库简单示例

 

解决

SqLiteActivity.java

 

package com.cuit.edu.cn;

import com.cuit.edu.cn.db.DateBaseHelper;

import android.app.Activity;
import android.content.ContentValues;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;

public class SqLiteActivity extends Activity {
    /** Called when the activity is first created. */
	
	private Button createButton = null;
	private Button updatebaseButton = null;
	private Button insertButton = null;
	private Button updateButton = null;
	private Button queryButton = null;
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        
        createButton = (Button)findViewById(R.id.createdatebase);
        updatebaseButton = (Button)findViewById(R.id.updateDatebase);
        insertButton = (Button)findViewById(R.id.insterButton);
        updateButton = (Button)findViewById(R.id.updateButton);
        queryButton = (Button)findViewById(R.id.queryButton);
        
        
        createButton.setText(R.string.create);
        updatebaseButton.setText(R.string.updatebase);
        insertButton.setText(R.string.insert);
        updateButton.setText(R.string.update);
        queryButton.setText(R.string.query);
        
        createButton.setOnClickListener(new createButtonListener());
        updatebaseButton.setOnClickListener(new updatebaseButtonListener());
        insertButton.setOnClickListener(new insertButtonListener());
        updateButton.setOnClickListener(new updateButtonListener());
        queryButton.setOnClickListener(new queryButtonListener());
        
        
        
    }
    
    class createButtonListener implements OnClickListener
    {

		@Override
		public void onClick(View v) {
			// TODO Auto-generated method stub
			DateBaseHelper dbHelper = new DateBaseHelper(SqLiteActivity.this, "user_Base");
			SQLiteDatabase db = dbHelper.getReadableDatabase();
		}
    	
    }
    
    class updatebaseButtonListener implements OnClickListener
    {

		@Override
		public void onClick(View v) {
			// TODO Auto-generated method stub
		 System.out.println("b================");
			DateBaseHelper dbHelper = new DateBaseHelper(SqLiteActivity.this, "user_Base",90);
			
			SQLiteDatabase db = dbHelper.getReadableDatabase();
			
			dbHelper.onUpgrade(db, 90, 91);
			
		}
    	
    }
    
    class insertButtonListener implements OnClickListener
    {

		@Override
		public void onClick(View v) {
			// TODO Auto-generated method stub
			ContentValues values = new ContentValues();
			values.put("id", 1);
			values.put("name", "rock");
			DateBaseHelper dbHelper = new DateBaseHelper(SqLiteActivity.this,"user_Base");
			SQLiteDatabase db = dbHelper.getWritableDatabase();
			db.insert("user", null, values);
		}
    	
    }
    
    class updateButtonListener implements OnClickListener
    {

		@Override
		public void onClick(View arg0) {
			// TODO Auto-generated method stub
			DateBaseHelper dbHelper = new DateBaseHelper(SqLiteActivity.this, "user_Base");
			SQLiteDatabase db = dbHelper.getWritableDatabase();
			ContentValues values = new ContentValues();
			values.put("name", "cara");
			db.update("user", values, "id=?", new String[]{"1"});
		}
    	
    }
    class queryButtonListener implements OnClickListener{

		@Override
		public void onClick(View v) {
			// TODO Auto-generated method stub
			DateBaseHelper dbHelper = new DateBaseHelper(SqLiteActivity.this, "user_Base");
			SQLiteDatabase db = dbHelper.getReadableDatabase();
			Cursor cursor = db.query("user", new String[]{"id","name"}, "id=?", new String[]{"1"}, null, null, null);
			while(cursor.moveToNext())
			{
				String name = cursor.getString(cursor.getColumnIndex("name"));
				System.out.println("------"+name);
			}
				
		}
    	
    }
}

 

DateBaseHelper.java

 

package com.cuit.edu.cn.db;

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

public class DateBaseHelper extends SQLiteOpenHelper {

	private static final int VERSION = 1;
	public DateBaseHelper(Context context, String name, CursorFactory factory,
			int version) {
		super(context, name, factory, version);
		// TODO Auto-generated constructor stub
	}
	
	public DateBaseHelper(Context context,String name)
	{
		this(context,name,VERSION);
	}
	
	public DateBaseHelper(Context context,String name,int version)
	{
		this(context,name,null,VERSION);
	}

	@Override
	public void onCreate(SQLiteDatabase db) {
		// TODO Auto-generated method stub
		System.out.println("createdataBase");
		
		db.execSQL("create table user(id int, name varchar(20))");
	}

	@Override
	public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
		// TODO Auto-generated method stub
		System.out.println("updataBase");
	}

}

 

main.xml

 

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="vertical" >

    <TextView
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:text="@string/hello" />
    <Button
        android:id="@+id/createdatebase" 
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        
        />

        <Button
        android:id="@+id/updateDatebase" 
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        />

        <Button
        android:id="@+id/insterButton" 
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        />
        <Button
        android:id="@+id/updateButton" 
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        
        />
        <Button
        android:id="@+id/queryButton" 
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        
        />
        

</LinearLayout>

 

strings.xml

 

<?xml version="1.0" encoding="utf-8"?>
<resources>

    <string name="hello">Hello World, SqLiteActivity!</string>
    <string name="app_name">SqLite</string>
    <string name="query">query</string>
    <string name="updatebase">updatebase</string>
    <string name="update">update</string>
    <string name="create">create</string>
    <string name="insert">insert</string>
    

</resources>

 

 

注意事项

1.       使用sqlite3命令需要在命令行界面使用；

2.       可以使用adb shell命令进入命令行界面，前提是模拟器需要开启，且成功配置Android环境变量（H:\Program files\android-sdk-windows\platform-tools）；

3.       数据文件保存在此路径下：/data/data/com.cuit.edu.cn/databases

4.       使用数据库，使用sqlite3数据库名命令。

 

 

参考资料

Android数据保存之SQLite方法

http://www.cnitblog.com/liaoqingshan/archive/2013/02/20/86986.html

 

Android sqlite3命令行操作方法

http://blog.csdn.net/ccwwff/article/details/5834482

 

Command Line Shell For SQLite

http://www.sqlite.org/sqlite.html

 

SQlite命令行工具的使用

http://www.cnblogs.com/hnrainll/archive/2011/04/22/2024627.html

 

SQLite命令行程序说明

http://blog.pfan.cn/lounger/26540.html

 

 

 

	@Wentasy 博文仅供参考，欢迎大家来访。如有错误之处，希望批评指正。原创博文如需转载请注明出处，谢谢 :) [CSDN博客]