Android中模拟器如何访问本地mysql数据库
package com.game.music;
import java.io.UnsupportedEncodingException;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.util.ArrayList;
import java.util.List;
import android.app.Activity;
import android.content.ContentValues;
import android.content.Intent;
import android.database.Cursor;
import android.os.Bundle;
import android.util.Log;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import com.game.GuessMusicName.R;
import com.game.music.entity.MusicInfo;
import com.game.music.entity.db.DBHelper;
import com.mysql.jdbc.Connection;
import com.mysql.jdbc.Statement;
public class MainActivity extends Activity {
private Button startButton;
private Button createDatabaseButton;
private Button insertButton;
private Button queryButton;
private List musicList = new ArrayList();
private Button mysqlButton = null;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
startButton = (Button)findViewById(R.id.start);
startButton.setOnClickListener(new StartButtonListener());
createDatabaseButton = (Button)findViewById(R.id.create);
insertButton = (Button)findViewById(R.id.insert);
queryButton = (Button)findViewById(R.id.query);
createDatabaseButton.setOnClickListener(new CreateDatabaseListener());
insertButton.setOnClickListener(new InsertDatabaseListener());
queryButton.setOnClickListener(new QueryDatabaseListener());
//测试连接mysql
mysqlButton = (Button) findViewById(R.id.mysql);
mysqlButton.setOnClickListener(new MysqlButtonListener());
}
class MysqlButtonListener implements OnClickListener{
@Override
public void onClick(View v) {
sqlCon();
}
}
// private void mSetText(String str){
// TextView txt=(TextView)findViewById(R.id.txt);
// txt.setText(str);
// }
private void sqlCon(){
System.out.println("0000000000000");
try {
Class.forName("com.mysql.jdbc.Driver");
} catch (Exception e) {
e.printStackTrace();
}
// 10.76.160.212 10.76.161.206
try {
System.out.println("1111111111111111111111111111111111");
// String url ="jdbc:mysql://10.0.0.2:3306/music_info?username=root&password=123456&useUnicode=true&characterEncoding=UTF-8";//链接数据库语句
// Connection conn= (Connection) DriverManager.getConnection(url); //链接数据库
Connection conn = (Connection) DriverManager.getConnection("jdbc:mysql://10.0.2.2:3306/music_info","root","123456");
Statement stmt=(Statement) conn.createStatement(ResultSet.TYPE_SCROLL_SENSITIVE,ResultSet.CONCUR_UPDATABLE);
String sql="select * from music";//查询music表语句
ResultSet rs=stmt.executeQuery(sql);//执行查询
StringBuilder str=new StringBuilder();
while(rs.next()){
str.append(rs.getString(2)+"\n");
}
// mSetText(str.toString());
System.out.println(str.toString());
rs.close();
stmt.close();
conn.close();
} catch (Exception e) {
e.printStackTrace();
}
}
class StartButtonListener implements OnClickListener{
@Override
public void onClick(View v) {
Intent intent = new Intent();
intent.setClass(MainActivity.this, GetMusicItemActivity.class);
Bundle bundle = new Bundle();
bundle.putString("name", "春暖花开");
intent.putExtras(bundle);
startActivity(intent);
}
}
class QueryDatabaseListener implements OnClickListener{
@Override
public void onClick(View v) {
Log.d("name", "---------------1111");
DBHelper dbHelper = new DBHelper(MainActivity.this, "", 1);
Cursor c = dbHelper.queryObject();
dbHelper.getReadableDatabase();
if(c.moveToNext()) {
for (int i = 0; i < c.getCount(); i++) {
int id = c.getInt(c.getColumnIndex("id"));
String musicName = c.getString(c.getColumnIndex("musicName"));
System.out.println("mid----------------->" +id);
System.out.println("mname----------------->" +musicName);
MusicInfo musicInfo = new MusicInfo();
musicInfo.setMusicId(id);
musicInfo.setMusicName(musicName);
musicList.add(musicInfo);
}
}
for (int i = 0; i < musicList.size(); i++) {
MusicInfo mi = new MusicInfo();
mi = (MusicInfo)musicList.get(i);
}
}
}
class CreateDatabaseListener implements OnClickListener{
@Override
public void onClick(View v) {
Log.d("name", "---------------");
DBHelper dbHelper = new DBHelper(MainActivity.this, "", 1);
dbHelper.getReadableDatabase();
}
}
class InsertDatabaseListener implements OnClickListener{
@Override
public void onClick(View v) {
Log.d("name", "---------------");
DBHelper dbHelper = new DBHelper(MainActivity.this, "", 1);
dbHelper.getReadableDatabase();
ContentValues values = new ContentValues();
String s [] = {"千里之外","春暖花开","黑色幽默","威廉古堡","世界末日",
"三年二班","以父之名", "想象之中", "断桥残雪", "清明雨上",
"星月神话", "单身情歌", "千千阙歌", "同桌的你", "你的样子"};
// String s [] = {"aaaa","bbbb","cccc","dddd","eeee"
// };
String string = "";
for(int i = 1; i<=15 ;i++){
values.put("id", i);
byte[] val = new byte[s[i-1].length()];
try {
val = s[i-1].getBytes("UTF-8");
string = new String(val,"UTF-8");
} catch (UnsupportedEncodingException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
values.put("musicName", string);
dbHelper.insert(values);
}
// values.put("id", "千里之外");
// values.put("2", "春暖花开");
//
// values.put("3", "黑色幽默");
// values.put("4", "威廉古堡");
// values.put("5", "世界末日");
// values.put("6", "三年二班");
// values.put("7", "以父之名");
// values.put("8", "想象之中");
// values.put("9", "断桥残雪");
// values.put("10", "清明雨上");
// values.put("11", "星月神话");
// values.put("12", "单身情歌");
// values.put("13", "千千阙歌");
// values.put("14", "同桌的你");
// values.put("15", "你的样子");
}
}
@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;
}
}
时间： 2024-09-20 03:57:27