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Androidの模倣QQのログインインターフェイスの例、ログインと登録機能を実現するために。

2022-02-18 18:36:42
<パス

最初の文

私は、以下の私の公開ウェブサイトをフォローすることを歓迎します。 矢口ジュニア

WeChat公開サイトでは、優先的に記事を更新しています。上のQRコードをスキャンしてフォローしてください 共に進み、共に育つ。

Androidの開発では、登録やログインの機能を使うことが多いので、一般的なログインのインターフェースをまとめて、それに対応する機能を実装しました。ご参考までに。このプロジェクトでは、ログイン、登録画面、パスワード取得の3つのアクティビティが含まれています。

GitHubのソースコードのアドレスです。 ログインテスト

インターフェース

コードがどのようにパースされたかを示します。

まず、ログイン画面のactivity_main.xmlです。 

public class MainActivity extends AppCompatActivity {
    private String userName,psw,spPsw;//get username, password, encrypted password
    private EditText et_user_name,et_psw;//edit box
    @Override
    protected void onCreate(Bundle savedInstanceState){
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        // set this interface to vertical
        setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);
        init();
    }
    //Get the interface controls
    private void init() {
        //get the id from main_title_bar
        //from activity_login.xml
        TextView tv_register = (TextView) findViewById(R.id.tv_register);
        TextView tv_find_psw = (TextView) findViewById(R.id.tv_find_psw);
        Button btn_login = (Button) findViewById(R.id.btn_login);
        et_user_name= (EditText) findViewById(R.id.et_user_name);
        et_psw= (EditText) findViewById(R.id.et_psw);
        // Immediately register the control's click event
        tv_register.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                // In order to jump to the registration screen and implement the registration function
                Intent intent=new Intent(MainActivity.this,RegisterActivity.class);
                startActivityForResult(intent, 1);
            }
        });
        //click event for password retrieval control
        tv_find_psw.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
               startActivity(new Intent(MainActivity.this,LostFindActivity.class));
            }
        });
        //click event of login button
        btn_login.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                //start login, get user name and password getText().toString().trim();
                userName = et_user_name.getText().toString().trim();
                psw = et_psw.getText().toString().trim();
                // the current user input password for MD5 encryption and then comparison judgment, MD5Utils.md5( ); psw encryption to determine whether the same
                String md5Psw = MD5Utils.md5(psw);
                // md5Psw ; spPsw reads the password based on the username from SharedPreferences
                // Define the method readPsw in order to read the user name and get the password
                spPsw = readPsw(userName);
                // TextUtils.isEmpty
                if (TextUtils.isEmpty(userName)) {
                    Toast.makeText(MainActivity.this, "Please enter user name", Toast.LENGTH_SHORT).show();
                } else if (TextUtils.isEmpty(psw)) {
                    Toast.makeText(MainActivity.this, "Please enter your password", Toast.LENGTH_SHORT).show();
                    // md5Psw.equals(); determine if the encrypted password is the same as the one saved in SharedPreferences
                } else if (md5Psw.equals(spPsw)) {
                    //consistent login success
                    Toast.makeText(MainActivity.this, "Login successful", Toast.LENGTH_SHORT).show();
         // Save the login status, save the login user name in the interface Define a method saveLoginStatus boolean status , userName username;
                    saveLoginStatus(true, userName);
                    //Close this page to the home page after successful login
                    Intent data = new Intent();
                    //datad.putExtra( ); name , value ;
                    data.putExtra("isLogin", true);
                    // RESULT_OK is an Activity system constant with a status code of -1
       // indicates that the content of this page will return data to the previous page successfully, if it is returned with back, there is no setResult to pass the data value
                    setResult(RESULT_OK, data);
                    //Destroy the login screen
                    MainActivity.this.finish();
                    //jump to the main interface and pass the status of successful login to the MainActivity
                    startActivity(new Intent(MainActivity.this, ItemActivity.class));
                } else if ((spPsw ! = null && !TextUtils.isEmpty(spPsw) && !md5Psw.equals(spPsw))) {
                    Toast.makeText(MainActivity.this, "The username and password entered do not match", Toast.LENGTH_SHORT).show();
                } else {
                    Toast.makeText(MainActivity.this, "This username does not exist", Toast.LENGTH_SHORT).show();
                }
            }
        });
    }
    /**
     * Read password from SharedPreferences based on username
     */
    private String readPsw(String userName){
        //getSharedPreferences("loginInfo",MODE_PRIVATE);
  
public class RegisterActivity extends AppCompatActivity {

    // controls for username, password, re-entered password
    private EditText et_user_name,et_psw,et_psw_again;
    //get the values of the controls for user name, password and re-entered password
    private String userName,psw,pswAgain;
    private RadioGroup Sex;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        //set the page layout ,register the interface
        setContentView(R.layout.activity_register);
        //set this interface to vertical screen
        setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);
        init();
    }

    private void init() {

        //get the corresponding UI control from the activity_register.xml page
        Button btn_register = (Button) findViewById(R.id.btn_register);
        et_user_name= (EditText) findViewById(R.id.et_user_name);
        et_psw= (EditText) findViewById(R.id.et_psw);
        et_psw_again= (EditText) findViewById(R.id.et_psw_again). et_psw_again= (EditText) findViewById(R.id.et_psw_again);
        Sex= (RadioGroup) findViewById(R.id.SexRadio);
        //register button
        btn_register.setOnClickListener(new View.OnClickListener() {

            @Override
            public void onClick(View v) {

                //get the string entered in the corresponding control
                getEditString();
                //judge the content of the input box
                int sex;
                int sexChoseId = Sex.getCheckedRadioButtonId();
                switch (sexChoseId) {
                    case R.id.mainRegisterRdBtnFemale:
                        sex = 0;
                        break;
                    case R.id.mainRegisterRdBtnMale:
                        sex = 1;
                        break;
                    default:
                        sex = -1;
                        break;
                }

                if(TextUtils.isEmpty(userName)){
                    Toast.makeText(RegisterActivity.this, "Please enter user name", Toast.LENGTH_SHORT).show();
                }else if(TextUtils.isEmpty(psw)){
                    Toast.makeText(RegisterActivity.this, "Please enter your password", Toast.LENGTH_SHORT).show();
                }else if(TextUtils.isEmpty(pswAgain)) {
                    Toast.makeText(RegisterActivity.this, "Please enter your password again", Toast.LENGTH_SHORT).show();
                } else if (sex<0){
                    Toast.makeText(RegisterActivity.this, "Please select gender", Toast.LENGTH_SHORT).show();
                }else if(!psw.equals(pswAgain)){
                    Toast.makeText(RegisterActivity.this, "The password entered twice is not the same", Toast.LENGTH_SHORT).show();

                    /**
                     * Read the entered username from SharedPreferences and determine if the username is available in SharedPreferences
                     */
                }else if(isExistUserName(userName)){
                    Toast.makeText(RegisterActivity.this, "This account name already exists", Toast.LENGTH_SHORT).show();

                }else{
                    Toast.makeText(RegisterActivity.this, "Registration successful", Toast.LENGTH_SHORT).show();
                    //Save the account number, password and account ID to the sp
                    /**
                     * Save account number and password to SharedPreferences
                     */
                    saveRegisterInfo(userName, psw);
                    // pass the account number to LoginActivity.java after successful registration
                    // return the value to the loginActivity display
                    Intent data = new Intent();
                    data.putExtra("userName", userName);
                    setResult(RESULT_OK, data);
                    // RESULT_OK is an Activity system constant with a status code of -1.
                    // indicates that the content operation under this page succeeded in returning the data to the previous page, if it is returned with back then there is no data value passed with setResult
                    RegisterActivity.this.finish();
                }
            }
        });
    }
    /**
     * Get the string in the control
     */
    private void getEditString(){
        userName=et_user_name.getText().toString().trim();
        psw=et_psw.getText().toString().trim();
        pswAgain=et_psw_again.getText().toString().trim();
    }
    /**
     * Read the entered user name from SharedPreferences and determine if the user name is available in SharedPreferences
     */
    private boolean isExistUserName(String userName){
        boolean has_userName=false;
        // mode_private SharedPreferences sp = getSharedPreferences( );
        // "loginInfo", MODE_PRIVATE
        SharedPreferences sp = getSharedPreferences("loginInfo", MODE_PRIVATE);
        //Get the password
        String spPsw=sp.getString(userName, "");//pass in the user name to get the password
        //If the password is not empty, then the user name was indeed saved
        if(!TextUtils.isEmpty(spPsw)) {
            has_userName=true;
        }
        return has_userName;
    }
    /**
     * Save account and password to SharedPreferences SharedPreferences
     */
    private void saveRegisterInfo(String userName,String psw){
        String md5Psw = MD5Utils.md5(psw);// encrypt the password with MD5
        //loginInfo means file name, mode_private SharedPreferences sp = getSharedPreferences( );
        SharedPreferences sp=getSharedPreferences("loginInfo", MODE_PRIVATE);

        //get the editor, SharedPref

ログインアクティビティMainActivityに対応します。 

public class MainActivity extends AppCompatActivity {
    private String userName,psw,spPsw;//get username, password, encrypted password
    private EditText et_user_name,et_psw;//edit box
    @Override
    protected void onCreate(Bundle savedInstanceState){
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        // set this interface to vertical
        setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);
        init();
    }
    //Get the interface controls
    private void init() {
        //get the id from main_title_bar
        //from activity_login.xml
        TextView tv_register = (TextView) findViewById(R.id.tv_register);
        TextView tv_find_psw = (TextView) findViewById(R.id.tv_find_psw);
        Button btn_login = (Button) findViewById(R.id.btn_login);
        et_user_name= (EditText) findViewById(R.id.et_user_name);
        et_psw= (EditText) findViewById(R.id.et_psw);
        // Immediately register the control's click event
        tv_register.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                // In order to jump to the registration screen and implement the registration function
                Intent intent=new Intent(MainActivity.this,RegisterActivity.class);
                startActivityForResult(intent, 1);
            }
        });
        //click event for password retrieval control
        tv_find_psw.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
               startActivity(new Intent(MainActivity.this,LostFindActivity.class));
            }
        });
        //click event of login button
        btn_login.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                //start login, get user name and password getText().toString().trim();
                userName = et_user_name.getText().toString().trim();
                psw = et_psw.getText().toString().trim();
                // the current user input password for MD5 encryption and then comparison judgment, MD5Utils.md5( ); psw encryption to determine whether the same
                String md5Psw = MD5Utils.md5(psw);
                // md5Psw ; spPsw reads the password based on the username from SharedPreferences
                // Define the method readPsw in order to read the user name and get the password
                spPsw = readPsw(userName);
                // TextUtils.isEmpty
                if (TextUtils.isEmpty(userName)) {
                    Toast.makeText(MainActivity.this, "Please enter user name", Toast.LENGTH_SHORT).show();
                } else if (TextUtils.isEmpty(psw)) {
                    Toast.makeText(MainActivity.this, "Please enter your password", Toast.LENGTH_SHORT).show();
                    // md5Psw.equals(); determine if the encrypted password is the same as the one saved in SharedPreferences
                } else if (md5Psw.equals(spPsw)) {
                    //consistent login success
                    Toast.makeText(MainActivity.this, "Login successful", Toast.LENGTH_SHORT).show();
         // Save the login status, save the login user name in the interface Define a method saveLoginStatus boolean status , userName username;
                    saveLoginStatus(true, userName);
                    //Close this page to the home page after successful login
                    Intent data = new Intent();
                    //datad.putExtra( ); name , value ;
                    data.putExtra("isLogin", true);
                    // RESULT_OK is an Activity system constant with a status code of -1
       // indicates that the content of this page will return data to the previous page successfully, if it is returned with back, there is no setResult to pass the data value
                    setResult(RESULT_OK, data);
                    //Destroy the login screen
                    MainActivity.this.finish();
                    //jump to the main interface and pass the status of successful login to the MainActivity
                    startActivity(new Intent(MainActivity.this, ItemActivity.class));
                } else if ((spPsw ! = null && !TextUtils.isEmpty(spPsw) && !md5Psw.equals(spPsw))) {
                    Toast.makeText(MainActivity.this, "The username and password entered do not match", Toast.LENGTH_SHORT).show();
                } else {
                    Toast.makeText(MainActivity.this, "This username does not exist", Toast.LENGTH_SHORT).show();
                }
            }
        });
    }
    /**
     * Read password from SharedPreferences based on username
     */
    private String readPsw(String userName){
        //getSharedPreferences("loginInfo",MODE_PRIVATE);

次に、登録画面 activity_register.xml です。

登録アクティビティRegisterActivityに対応しています。 

public class RegisterActivity extends AppCompatActivity {

    // controls for username, password, re-entered password
    private EditText et_user_name,et_psw,et_psw_again;
    //get the values of the controls for user name, password and re-entered password
    private String userName,psw,pswAgain;
    private RadioGroup Sex;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        //set the page layout ,register the interface
        setContentView(R.layout.activity_register);
        //set this interface to vertical screen
        setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);
        init();
    }

    private void init() {

        //get the corresponding UI control from the activity_register.xml page
        Button btn_register = (Button) findViewById(R.id.btn_register);
        et_user_name= (EditText) findViewById(R.id.et_user_name);
        et_psw= (EditText) findViewById(R.id.et_psw);
        et_psw_again= (EditText) findViewById(R.id.et_psw_again). et_psw_again= (EditText) findViewById(R.id.et_psw_again);
        Sex= (RadioGroup) findViewById(R.id.SexRadio);
        //register button
        btn_register.setOnClickListener(new View.OnClickListener() {

            @Override
            public void onClick(View v) {

                //get the string entered in the corresponding control
                getEditString();
                //judge the content of the input box
                int sex;
                int sexChoseId = Sex.getCheckedRadioButtonId();
                switch (sexChoseId) {
                    case R.id.mainRegisterRdBtnFemale:
                        sex = 0;
                        break;
                    case R.id.mainRegisterRdBtnMale:
                        sex = 1;
                        break;
                    default:
                        sex = -1;
                        break;
                }

                if(TextUtils.isEmpty(userName)){
                    Toast.makeText(RegisterActivity.this, "Please enter user name", Toast.LENGTH_SHORT).show();
                }else if(TextUtils.isEmpty(psw)){
                    Toast.makeText(RegisterActivity.this, "Please enter your password", Toast.LENGTH_SHORT).show();
                }else if(TextUtils.isEmpty(pswAgain)) {
                    Toast.makeText(RegisterActivity.this, "Please enter your password again", Toast.LENGTH_SHORT).show();
                } else if (sex<0){
                    Toast.makeText(RegisterActivity.this, "Please select gender", Toast.LENGTH_SHORT).show();
                }else if(!psw.equals(pswAgain)){
                    Toast.makeText(RegisterActivity.this, "The password entered twice is not the same", Toast.LENGTH_SHORT).show();

                    /**
                     * Read the entered username from SharedPreferences and determine if the username is available in SharedPreferences
                     */
                }else if(isExistUserName(userName)){
                    Toast.makeText(RegisterActivity.this, "This account name already exists", Toast.LENGTH_SHORT).show();

                }else{
                    Toast.makeText(RegisterActivity.this, "Registration successful", Toast.LENGTH_SHORT).show();
                    //Save the account number, password and account ID to the sp
                    /**
                     * Save account number and password to SharedPreferences
                     */
                    saveRegisterInfo(userName, psw);
                    // pass the account number to LoginActivity.java after successful registration
                    // return the value to the loginActivity display
                    Intent data = new Intent();
                    data.putExtra("userName", userName);
                    setResult(RESULT_OK, data);
                    // RESULT_OK is an Activity system constant with a status code of -1.
                    // indicates that the content operation under this page succeeded in returning the data to the previous page, if it is returned with back then there is no data value passed with setResult
                    RegisterActivity.this.finish();
                }
            }
        });
    }
    /**
     * Get the string in the control
     */
    private void getEditString(){
        userName=et_user_name.getText().toString().trim();
        psw=et_psw.getText().toString().trim();
        pswAgain=et_psw_again.getText().toString().trim();
    }
    /**
     * Read the entered user name from SharedPreferences and determine if the user name is available in SharedPreferences
     */
    private boolean isExistUserName(String userName){
        boolean has_userName=false;
        // mode_private SharedPreferences sp = getSharedPreferences( );
        // "loginInfo", MODE_PRIVATE
        SharedPreferences sp = getSharedPreferences("loginInfo", MODE_PRIVATE);
        //Get the password
        String spPsw=sp.getString(userName, "");//pass in the user name to get the password
        //If the password is not empty, then the user name was indeed saved
        if(!TextUtils.isEmpty(spPsw)) {
            has_userName=true;
        }
        return has_userName;
    }
    /**
     * Save account and password to SharedPreferences SharedPreferences
     */
    private void saveRegisterInfo(String userName,String psw){
        String md5Psw = MD5Utils.md5(psw);// encrypt the password with MD5
        //loginInfo means file name, mode_private SharedPreferences sp = getSharedPreferences( );
        SharedPreferences sp=getSharedPreferences("loginInfo", MODE_PRIVATE);

        //get the editor, SharedPref

そして最後にパスワード検索画面 activity_lost_find.xml です。

パスワード回復機能は、あくまで新しいアクティビティであり、機能を実装しているわけではありません。

概要：この機能は、内蔵データベースSQLiteを使用せず、MD5暗号化アルゴリズムを使って行われます。

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