用java调用sqlite

网络111 刘修军

1、首先启动eclipse和android虚拟机，用adb shell命令行新建目录、SQLite数据库和表，并完成表记录的添加、删除、修改操作。

命令如下：

启动ADB

(1)编写一个批处理文件runadb.bat

path F:eclipse 3.7android-sdksplatform-tools

adb shell

(2) 新建文件夹

在/data/data/目录下，建立了目录“mySQLite.com/databases”

#cd data /data

#mkdir mySQLite.com

#cd mySQLite.com

#mkdir databases

#cd databases

(3)新建数据库

#sqlite3 test.db

新建数据库后，提示符变成“sqlite>”

(4)新建表

sqlite>create table contacter("no" INTEGER,"name" TEXT,"tel" TEXT);

(5) 查看表结构

sqlite>select * form sqlite_master where type="table" and name="表名";

(6)添加记录

sqlite> insert into contacter("no","name","tel") values(1001,"张三","15111114444");

(7)显示记录

sqlite>.explain ON

sqlite>select * from contacter;

2、编写android程序实现表记录的添加、查询。

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

public class SQLHelper extends SQLiteOpenHelper {

    public SQLHelper(Context context, String name, CursorFactory factory,
            int version) {
        super(context, name, factory, version);
        // TODO Auto-generated constructor stub
    }

    @Override
    public void onCreate(SQLiteDatabase arg0) {
        // TODO Auto-generated method stub

    }

    @Override
    public void onUpgrade(SQLiteDatabase arg0, int arg1, int arg2) {
        // TODO Auto-generated method stub

    }

}

import android.app.Activity;
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;
import android.widget.EditText;
import android.widget.TextView;

public class SqlitActivity extends Activity implements OnClickListener {
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        btnAdd=(Button) findViewById(R.id.btn);
        btnDel=(Button) findViewById(R.id.btnDel);
        btnUpdate=(Button) findViewById(R.id.btnUpdate);
        cha=(Button) findViewById(R.id.chaxun);
        btnAdd.setOnClickListener(this);
        btnDel.setOnClickListener(this);
        btnDel.setOnClickListener(this);
        cha.setOnClickListener(this);
          de=(EditText) findViewById(R.id.edt);
        
    }
     Button btnAdd,btnDel,btnUpdate ,cha;
     EditText de;
    
     
    @Override
    public void onClick(View arg0) {
        // TODO Auto-generated method stub
        Button b=(Button) arg0;
         int  id=b.getId();
         SQLHelper heple=new SQLHelper(this,"test.db",null,1);
         SQLiteDatabase db=heple.getWritableDatabase();//
         if(id==R.id.btn)
         {
             String sql="insert into lxr(no,name,tel) values('001','liming','1233444')";
             db.execSQL(sql);     
         }
          if(id==R.id.chaxun)
         {
             Cursor cursor=db.query("lxr", new String[]{"*"},"name=?",new String[]{"liming"}, null, null, null);
            // db.query(table, columns, selection, selectionArgs, groupBy, having, orderBy)
             String s="查询结果
";
             String d="eeee";
             while(cursor.moveToNext())
             {
                  String no= cursor.getString( cursor.getColumnIndex("no"));
                 String name=cursor.getString(cursor.getColumnIndex("name"));
                 String tel=cursor.getString(cursor.getColumnIndex("tel"));
                 s+=no+","+name+","+tel+"
";
            
                 
                 
             }
             de.setText(s); 
        
            
         }
        
         
        
    }
}