Android登录注册
16lz
2021-01-25
Android 登录注册
学了一段时间的Android开发，通过写博客记录一下学习过程遇到的问题和一些想要分享的东西。
页面效果如图所示：
整个登录和注册页面都是连接服务器进行操作的，客户端向服务端发出请求，服务端接收请求并进行相应的处理。登录过程中，客户端将用户输入的账号和密码发送给服务器，服务端查询数据库验证登录是否成功，返回登录结果。注册过程中，服务端先查询用户输入的账号是否存在，若存在则要求用户更改账号名，不存在则对数据库执行插入数据操作，返回注册结果。
1、登录页面代码
public class LoginActivity extends Activity { private SharedPreferences.Editor editor; private EditText accountEdit; private EditText passwordEdit; private Button login; private static final int OK = 200; private CheckBox rememberPass; private SharedPreferences sp; protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_login); //getWindow().setBackgroundDrawableResource(R.drawable.login); sp = getSharedPreferences("info1.txt", MODE_PRIVATE); accountEdit = (EditText) findViewById(R.id.user); passwordEdit = (EditText) findViewById(R.id.pass); rememberPass = (CheckBox) findViewById(R.id.remember_pass); login = (Button) findViewById(R.id.login); boolean isRemember = sp.getBoolean("remember_password", false); if (isRemember) { //将账号密码都设置到文本框中 String account = sp.getString("account", ""); String password = sp.getString("password", ""); accountEdit.setText(account); passwordEdit.setText(password); rememberPass.setChecked(true); } login.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View view) { final String username = accountEdit.getText().toString(); final String password = passwordEdit.getText().toString(); //服务端路径 final String serverPath = "http://xxx.xxx.xxx.xxx:8080/ServletTest/login"; if (TextUtils.isEmpty(username) || TextUtils.isEmpty(password)) { Toast.makeText(LoginActivity.this,"用户名或密码不能为空！",Toast.LENGTH_SHORT).show(); } else { editor = sp.edit(); if (rememberPass.isChecked()) { editor.putBoolean("remember_password", true); editor.putString("account", username); editor.putString("password", password); } else { editor.clear(); } editor.commit(); new Thread(new Runnable() { @Override public void run() { try { //使用GET方式请求服务器只能这样 URL url = new URL(serverPath + "?username=" + username + "&password=" + password); HttpURLConnection httpURLConnection = (HttpURLConnection) url.openConnection(); httpURLConnection.setRequestMethod("GET"); httpURLConnection.setConnectTimeout(5000); httpURLConnection.setRequestProperty("User-Agent", "Mozilla/5.0 (Windows NT 6.1; WOW64; rv:22.0) Gecko/20100101 Firefox/22.0"); int responseCode = httpURLConnection.getResponseCode(); if (200 == responseCode) { InputStream inputStream = httpURLConnection.getInputStream(); BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(inputStream, "UTF-8")); final String responseMsg = bufferedReader.readLine(); runOnUiThread(new Runnable() { @Override public void run() { if (responseMsg.equals("true")){ Toast.makeText(LoginActivity.this, "登录成功！", Toast.LENGTH_LONG).show(); }else { Toast.makeText(LoginActivity.this, "登录失败！", Toast.LENGTH_LONG).show(); } } }); bufferedReader.close(); httpURLConnection.disconnect(); } else { } } catch (Exception e) { e.printStackTrace(); } } }).start(); } } }); TextView tv_register=(TextView) findViewById(R.id.register); tv_register.setClickable(true); tv_register.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { //点击“没有账号？去注册”跳转至注册页面 Intent intent2=new Intent(LoginActivity.this,RegisterActivity.class); startActivity(intent2); } }); }}2、注册页面代码
public class RegisterActivity extends Activity implements View.OnClickListener { private EditText user; private EditText pw; private EditText pw2; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); requestWindowFeature(Window.FEATURE_NO_TITLE); setContentView(R.layout.activity_register); user = (EditText) findViewById(R.id.et_user_register); pw = (EditText) findViewById(R.id.et_pass_register); pw2 = (EditText) findViewById(R.id.et_pass_register2); Button button = (Button) findViewById(R.id.register); button.setOnClickListener(this); } @Override public void onClick(View v) { final String username1 = user.getText().toString().trim(); final String password1 = pw.getText().toString().trim(); final String password2 = pw2.getText().toString().trim(); //服务端地址 final String serverPath = "http://xxx.xxx.xxx.xxx:8080/ServletTest/register"; if (TextUtils.isEmpty(username1) || TextUtils.isEmpty(password1) || TextUtils.isEmpty(password2)) { Toast.makeText(RegisterActivity.this, "请输入用户名，密码和确认密码！！！", Toast.LENGTH_SHORT).show(); } else { if (!(password1.equals(password2))) { Toast.makeText(RegisterActivity.this, "两次输入的密码不同，请重新输入！！！", Toast.LENGTH_SHORT).show(); } else { new Thread(new Runnable() { @Override public void run() { try { //使用GET方式请求服务器只能这样 URL url = new URL(serverPath + "?username=" + username1 + "&password=" + password1); HttpURLConnection httpURLConnection = (HttpURLConnection) url.openConnection(); httpURLConnection.setRequestMethod("GET"); httpURLConnection.setConnectTimeout(5000); httpURLConnection.setRequestProperty("User-Agent", "Mozilla/5.0 (Windows NT 6.1; WOW64; rv:22.0) Gecko/20100101 Firefox/22.0"); final int responseCode = httpURLConnection.getResponseCode(); if (200 == responseCode) { InputStream inputStream = httpURLConnection.getInputStream(); BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(inputStream, "UTF-8")); final String responseMsg = bufferedReader.readLine(); runOnUiThread(new Runnable() { @Override public void run() { if (responseMsg.equals("equal")){ Toast.makeText(RegisterActivity.this, "账号存在，请更改用户名！！", Toast.LENGTH_LONG).show(); }else if(responseMsg.equals("true")){ Toast.makeText(RegisterActivity.this, "注册成功！", Toast.LENGTH_LONG).show(); //注册成功跳转登录界面 Intent intent=new Intent(RegisterActivity.this,LoginActivity.class); startActivity(intent); }else { Toast.makeText(RegisterActivity.this, "注册失败！", Toast.LENGTH_LONG).show(); } } }); bufferedReader.close(); httpURLConnection.disconnect(); } else { } } catch (Exception e) { e.printStackTrace(); } } }).start(); } } }}3、在AndroidManifest.xml清单文件中添加Android联网权限
注：页面布局比较简单就不给出了
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