Android 開發(fā)。。。如何連接到服務器上的mysql數(shù)據(jù)庫

1、首先輸入代碼

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public void SendByHttpClient(final String id, final String pw){

new Thread(new Runnable() {

@Override

public void run() {

try {

HttpClient httpclient=new DefaultHttpClient();

HttpPost httpPost=new HttpPost("應用部署服務器上的IP地址:/HttpClientDemo/Login");//服務器地址，指向Servlet

ListNameValuePair params=new ArrayListNameValuePair();//將id和pw裝入list

params.add(new BasicNameValuePair("ID",id));

params.add(new BasicNameValuePair("PW",pw));

final UrlEncodedFormEntity entity=new UrlEncodedFormEntity(params,"utf-8");//以UTF-8格式發(fā)送

httpPost.setEntity(entity);

HttpResponse httpResponse= httpclient.execute(httpPost);

if(httpResponse.getStatusLine().getStatusCode()==200)//在200毫秒之內(nèi)接收到返回值

2、然后再輸入下方的代碼：

{

HttpEntity entity=httpResponse.getEntity();

String response=EntityUtils.toString(entity1, "utf-8");//以UTF-8格式解析

Message message=new Message();

message.what=USER_LOGIN;

message.obj=response;

handler.sendMessage(message);使用Message傳遞消息給線程

}

}

catch (Exception e) {

e.printStackTrace();

}

}

}).start();

}

3、最終，測試結(jié)果圖，如下：

安卓app 怎么連接mysql

android 鏈接mysql數(shù)據(jù)庫實例：

package com.hl;

import java.sql.DriverManager;

import java.sql.ResultSet;

import com.mysql.jdbc.Connection;

import com.mysql.jdbc.Statement;

import android.app.Activity;

import android.os.Bundle;

import android.view.View;

import android.view.View.OnClickListener;

import android.widget.Button;

import android.widget.TextView;

public class AndroidMsql extends Activity {

@Override

public void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.main);

Button btn=(Button)findViewById(R.id.btn);

btn.setOnClickListener(new 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(){

try {

Class.forName("com.mysql.jdbc.Driver");

} catch (Exception e) {

e.printStackTrace();

}

try {

String url ="jdbc:mysql://192.168.142.128:3306/mysql?user=zzfeihuapassword=12345useUnicode=truecharacterEncoding=UTF-8";//鏈接數(shù)據(jù)庫語句

Connection conn= (Connection) DriverManager.getConnection(url); //鏈接數(shù)據(jù)庫

Statement stmt=(Statement) conn.createStatement(ResultSet.TYPE_SCROLL_SENSITIVE,ResultSet.CONCUR_UPDATABLE);

String sql="select * from user";//查詢user表語句

ResultSet rs=stmt.executeQuery(sql);//執(zhí)行查詢

StringBuilder str=new StringBuilder();

while(rs.next()){

str.append(rs.getString(1)+"\n");

}

mSetText(str.toString());

rs.close();

stmt.close();

conn.close();

} catch (Exception e) {

e.printStackTrace();

}

}

}

不過eclipse老是提示：

warning: Ignoring InnerClasses attribute for an anonymous inner class that doesn't come with an associated EnclosingMethod attribute. (This class was probably produced by a broken compiler.)

android怎么連接mysql數(shù)據(jù)庫

用Android程序去直連MySQL數(shù)據(jù)庫，覺得這樣做不好，出于安全等方面考慮。數(shù)據(jù)庫地址，用戶名密碼，查詢SQL什么的都存在程序里，很容易被反編譯等方法看到。

建議把表示層和數(shù)據(jù)層邏輯分開，數(shù)據(jù)層對應網(wǎng)頁的表示層提供接口，同時在為Android手機端提供一個接口，簡介訪問數(shù)據(jù)庫，這接口可以2端都保持一致，比如XML+RPC或者json等等，Android端也有現(xiàn)成的東西能直接用，既安全又省事。

android 鏈接mysql數(shù)據(jù)庫實例：

package com.hl;

import java.sql.DriverManager;

import java.sql.ResultSet;

import com.mysql.jdbc.Connection;

import com.mysql.jdbc.Statement;

import android.app.Activity;

import android.os.Bundle;

import android.view.View;

import android.view.View.OnClickListener;

import android.widget.Button;

import android.widget.TextView;

public class AndroidMsql extends Activity {

@Override

public void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.main);

Button btn=(Button)findViewById(R.id.btn);

btn.setOnClickListener(new 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(){

try {

Class.forName("com.mysql.jdbc.Driver");

} catch (Exception e) {

e.printStackTrace();

}

try {

String url ="jdbc:mysql://192.168.142.128:3306/mysql?user=zzfeihuapassword=12345useUnicode=truecharacterEncoding=UTF-8";//鏈接數(shù)據(jù)庫語句

Connection conn= (Connection) DriverManager.getConnection(url); //鏈接數(shù)據(jù)庫

Statement stmt=(Statement) conn.createStatement(ResultSet.TYPE_SCROLL_SENSITIVE,ResultSet.CONCUR_UPDATABLE);

String sql="select * from user";//查詢user表語句

ResultSet rs=stmt.executeQuery(sql);//執(zhí)行查詢

StringBuilder str=new StringBuilder();

while(rs.next()){

str.append(rs.getString(1)+"\n");

}

mSetText(str.toString());

rs.close();