Android 登入註冊

學了一段時間的Android開發，通過寫部落格記錄一下學習過程遇到的問題和一些想要分享的東西。
頁面效果如圖所示：

整個登入和註冊頁面都是連線伺服器進行操作的，客戶端向服務端發出請求，服務端接收請求並進行相應的處理。登入過程中，客戶端將使用者輸入的賬號和密碼傳送給伺服器，服務端查詢資料庫驗證登入是否成功，返回登入結果。註冊過程中，服務端先查詢使用者輸入的賬號是否存在，若存在則要求使用者更改賬號名，不存在則對資料庫執行插入資料操作，返回註冊結果。

1、登入頁面程式碼

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) {
            //將賬號密碼都設定到文字框中
            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();
                //服務端路徑
                final String serverPath = "http://xxx.xxx.xxx.xxx:8080/ServletTest/login";
                if (TextUtils.isEmpty(username) || TextUtils.isEmpty(password)) {
                    Toast.makeText(LoginActivity.this,"使用者名稱或密碼不能為空！",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方式請求伺服器只能這樣
                                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, "登入成功！", Toast.LENGTH_LONG).show();
                                            }else {
                                                Toast.makeText(LoginActivity.this, "登入失敗！", 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) {
            //點選“沒有賬號？去註冊”跳轉至註冊頁面
                Intent intent2=new Intent(LoginActivity.this,RegisterActivity.class);
                startActivity(intent2);
            }
        });
    }
}

 

2、註冊頁面程式碼

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();
        //服務端地址
        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, "請輸入使用者名稱，密碼和確認密碼！！！", Toast.LENGTH_SHORT).show();
        } else {
            if (!(password1.equals(password2))) {
                Toast.makeText(RegisterActivity.this, "兩次輸入的密碼不同，請重新輸入！！！", Toast.LENGTH_SHORT).show();
            } else {
                new Thread(new Runnable() {
                    @Override
                    public void run() {
                        try {
                            //使用GET方式請求伺服器只能這樣
                            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, "賬號存在，請更改使用者名稱！！", Toast.LENGTH_LONG).show();

                                        }else if(responseMsg.equals("true")){
                                            Toast.makeText(RegisterActivity.this, "註冊成功！", Toast.LENGTH_LONG).show();
                                            //註冊成功跳轉登入介面
                                            Intent intent=new Intent(RegisterActivity.this,LoginActivity.class);
                                            startActivity(intent);
                                        }else {
                                            Toast.makeText(RegisterActivity.this, "註冊失敗！", Toast.LENGTH_LONG).show();
                                        }
                                    }
                                });
                                bufferedReader.close();
                                httpURLConnection.disconnect();
                            } else {
                                
                            }
                        } catch (Exception e) {
                            e.printStackTrace();
                        }
                    }
                }).start();
            }
        }
    }
}

 

3、在AndroidManifest.xml清單檔案中新增Android聯網許可權

<uses-permission android:name="android.permission.INTERNET" />

注：頁面佈局比較簡單就不給出了