标签：
1.首先导入ojdbc14.jar包
2.这是首页面
package com.android.logins;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;
public class LoginActivity extends Activity {
/** Called when the activity is first created. */
EditText userName;
EditText password;
Button btn_login;
String userNameValue, passwordValue;
Connection connection = null;
@Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
userName = (EditText) findViewById(R.id.et_zh);
password = (EditText) findViewById(R.id.et_mima);
btn_login = (Button) findViewById(R.id.btn_login);
try {
Class.forName("oracle.jdbc.driver.OracleDriver");
connection = DriverManager.getConnection(
"jdbc:oracle:thin:@192.168.100.109:1521:orcl", "show",
"show");
} catch (ClassNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
System.out.println("加载程序驱动出错");
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
btn_login.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View arg0) {
// TODO Auto-generated method stub
try {
String sql = "select * from userlogin ";
Statement stmt = connection.createStatement();
ResultSet rSet = stmt.executeQuery(sql);
userNameValue = userName.getText().toString();
passwordValue = password.getText().toString();
while (rSet.next()) {
System.out.println(rSet.getString("name"));
System.out.println(rSet.getString("password"));
if (userNameValue.equals(rSet.getString("name"))
&& passwordValue.equals(rSet
.getString("password"))) {
Toast.makeText(LoginActivity.this, "登录成功",
Toast.LENGTH_SHORT).show();
Intent intent = new Intent(LoginActivity.this,
WelcomeAvtivity.class);
startActivity(intent);
} else {
Toast.makeText(LoginActivity.this,
"用户名或密码错误，请重新登录", Toast.LENGTH_SHORT)
.show();
}
}
rSet.close();
stmt.close();
} catch (Exception e) {
System.out.println(e.getMessage().toString());
} finally {
if (connection != null) {
try {
connection.close();
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
}
});
}
}package com.android.logins; import java.sql.Connection; import java.sql.DriverManager; import java.sql.ResultSet; import java.sql.SQLException; import java.sql.Statement; import android.app.Activity; import android.content.Intent; import android.os.Bundle; import android.view.View; import android.view.View.OnClickListener; import android.widget.Button; import android.widget.EditText; import android.widget.Toast; public class LoginActivity extends Activity { /** Called when the activity is first created. */ EditText userName; EditText password; Button btn_login; String userNameValue, passwordValue; Connection connection = null; @Override protected void onCreate(Bundle savedInstanceState) { // TODO Auto-generated method stub super.onCreate(savedInstanceState); setContentView(R.layout.main); userName = (EditText) findViewById(R.id.et_zh); password = (EditText) findViewById(R.id.et_mima); btn_login = (Button) findViewById(R.id.btn_login); try { Class.forName("oracle.jdbc.driver.OracleDriver"); connection = DriverManager.getConnection( "jdbc:oracle:thin:@192.168.100.109:1521:orcl", "show", "show"); } catch (ClassNotFoundException e) { // TODO Auto-generated catch block e.printStackTrace(); System.out.println("加载程序驱动出错"); } catch (SQLException e) { // TODO Auto-generated catch block e.printStackTrace(); } btn_login.setOnClickListener(new OnClickListener() { @Override public void onClick(View arg0) { // TODO Auto-generated method stub try { String sql = "select * from userlogin "; Statement stmt = connection.createStatement(); ResultSet rSet = stmt.executeQuery(sql); userNameValue = userName.getText().toString(); passwordValue = password.getText().toString(); while (rSet.next()) { System.out.println(rSet.getString("name")); System.out.println(rSet.getString("password")); if (userNameValue.equals(rSet.getString("name")) && passwordValue.equals(rSet .getString("password"))) { Toast.makeText(LoginActivity.this, "登录成功", Toast.LENGTH_SHORT).show(); Intent intent = new Intent(LoginActivity.this, WelcomeAvtivity.class); startActivity(intent); } else { Toast.makeText(LoginActivity.this, "用户名或密码错误，请重新登录", Toast.LENGTH_SHORT) .show(); } } rSet.close(); stmt.close(); } catch (Exception e) { System.out.println(e.getMessage().toString()); } finally { if (connection != null) { try { connection.close(); } catch (Exception e) { // TODO Auto-generated catch block e.printStackTrace(); } } } } }); } }
3.注意AndroidManifest.xml的文件
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.android.logins"
android:versionCode="1"
android:versionName="1.0">
<application android:icon="@drawable/icon" android:label="@string/app_name">
<activity android:name=".LoginActivity"
android:label="@string/app_name">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
由于由跳转，所以在这里必须写，注意，以后如果在跳转页面中使用到，在这里都必须定义 <activity android:name=".WelcomeAvtivity"></activity>
</application>
<uses-sdk android:minSdkVersion="8" />
定义权限，连接网络，这里必须写 <uses-permission android:name="android.permission.INTERNET"></uses-permission>
</manifest>由于由跳转，所以在这里必须写，注意，以后如果在跳转页面中使用到，在这里都必须定义 定义权限，连接网络，这里必须写
以上是我做的一个基础的连接数据库，由于本人现在也是初学者，如有不足之处，请大家指出，相互学习
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