Llevarlo paso a paso para completar el caso de modificación de inicio de sesión de Android

Crear un nuevo proyecto vacío

En este punto, nuestro proyecto está completo. A continuación, escribamos la página de la aplicación.

Prepárese con anticipación

        1. Cree un nuevo archivo java y xml de inicio de sesión

        2. Siga los mismos pasos para crear una nueva página en la que olvidó iniciar sesión.

        3. Cree una clase de herramienta. Esta herramienta se utiliza principalmente para ocultar el teclado virtual.

import android.app.Activity;
import android.content.Context;
import android.view.View;
import android.view.inputmethod.InputMethodManager;

public class ViewTuil {
    public static void hidekey(Activity a, View v){

        InputMethodManager im =(InputMethodManager) a.getSystemService(Context.INPUT_METHOD_SERVICE);
        im.hideSoftInputFromWindow(v.getWindowToken(),0);
    }
}

        4. Importe la imagen de fondo debajo del archivo dibujable.

        5. Definir el texto y colores que necesitamos en el directorio de valores.

        colores

<color name="grey">#cccccc</color>
<color name="red">#BF1206</color>

         instrumentos de cuerda

    <string name="login_by_password">密码登录</string>
    <string name="login_by_verifycode">验证码登录</string>
    <string name="phone_number">手机号码：</string>
    <string name="input_phone_number">请输入手机号码</string>
    <string name="login_password">登录密码：</string>
    <string name="input_password">请输入密码：</string>
    <string name="forget_password">忘记密码</string>
    <string name="remember_password">记住密码</string>
    <string name="login">登&#160; &#160; &#160; 录</string>
    <string name="input_new_password">输入新密码：</string>
    <string name="input_new_password_hint">请输入新密码</string>
    <string name="confirm_new_password">确认新密码：</string>
    <string name="input_new_password_again">请再次输入新密码</string>
    <string name="verifycode">&#160; &#160; 验证码：</string>
    <string name="verifycode2">&#160; &#160; &#160; &#160; 验证码：</string>
    <string name="input_verifycode">请输入验证码</string>
    <string name="get_verifycode">获取验证码</string>
    <string name="done">确&#160; &#160; &#160;定</string>
    <string name="main">欢迎来到主页面</string>
    <string name="ret">返回</string>
     <string name="get">获取验证码</string>

        Cree un nuevo xml responsable del tamaño del texto

<?xml version="1.0" encoding="utf-8"?>
<resources>
    <dimen name="csize">17sp</dimen>
    <dimen name="bsize">20sp</dimen>
    <dimen name="lsize">50sp</dimen>
</resources>

        6. Modificar la página de actividad_main

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:padding="10dp"
    android:orientation="vertical"
    android:background="@drawable/bg"
    tools:context=".MainActivity">

    <TextView
        android:layout_width="match_parent"
        android:layout_height="@dimen/lsize"
        android:layout_marginTop="360dp"
        android:gravity="center"
        android:text="@string/main"
        android:textColor="@color/red"
        android:textSize="@dimen/bsize" />
    <Button
        android:id="@+id/ret"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="@string/ret"
        android:layout_marginTop="60dp"></Button>
</LinearLayout>

        El estilo modificado se muestra a continuación.

         En este punto nuestros preparativos están completos.

1. Escriba la página de inicio de sesión de actividad (no modifique el nombre de la identificación si no es necesario)

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    tools:context=".LoginActivity">


    <RadioGroup
        android:id="@+id/login"
        android:layout_width="match_parent"
        android:layout_height="@dimen/lsize"
        android:orientation="horizontal">

        <RadioButton
            android:id="@+id/word"
            android:layout_width="0dp"
            android:layout_weight="1"
            android:layout_height="match_parent"
            android:text="@string/login_by_password"
            android:textSize="@dimen/csize"
            android:checked="true"/>

        <RadioButton
            android:id="@+id/veryword"
            android:layout_width="0dp"
            android:layout_weight="1"
            android:layout_height="match_parent"
            android:text="@string/login_by_verifycode"
            android:textSize="@dimen/csize"/>
    </RadioGroup>




    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="@dimen/lsize"
        android:orientation="horizontal">

        <TextView
            android:layout_width="wrap_content"
            android:layout_height="match_parent"
            android:text="@string/phone_number"
            android:textColor="@color/black"
            android:textSize="@dimen/csize" />

        <EditText
            android:id="@+id/etphone"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:layout_marginTop="5dp"
            android:layout_marginBottom="5dp"
            android:hint="@string/input_phone_number"
            android:inputType="number"
            android:maxLength="11"
            android:textColor="@color/black"
            android:textColorHint="@color/grey"
            android:textSize="@dimen/csize">
        </EditText>
    </LinearLayout>






    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="@dimen/lsize"
        android:orientation="horizontal">

        <TextView
            android:id="@+id/tvword"
            android:layout_width="wrap_content"
            android:layout_height="match_parent"
            android:text="@string/login_password"
            android:textColor="@color/black"
            android:textSize="@dimen/csize" />

        <RelativeLayout
            android:layout_width="0dp"
            android:layout_weight="1"
            android:layout_height="match_parent">

            <EditText
                android:id="@+id/etword"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_weight="1"
                android:layout_marginTop="5dp"
                android:layout_marginBottom="5dp"
                android:hint="@string/input_password"
                android:inputType="numberPassword"
                android:maxLength="11"
                android:textColor="@color/black"
                android:textColorHint="@color/grey"
                android:textSize="@dimen/csize">

            </EditText>


            <Button
                android:id="@+id/btnforget"
                android:layout_width="wrap_content"
                android:layout_height="match_parent"
                android:text="@string/forget_password"
                android:layout_alignParentRight="true"
                android:textColor="@color/black"
                android:textSize="@dimen/csize">
            </Button>


        </RelativeLayout>



    </LinearLayout>
    <CheckBox
        android:id="@+id/ckremember"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="@string/remember_password"
        android:textColor="@color/black"
        android:textSize="@dimen/csize" />

    <Button
        android:id="@+id/btnremember"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="@string/login"
        android:textColor="@color/black"
        android:textSize="@dimen/bsize" />



</LinearLayout>

2. Escribe la lógica de la página de inicio de sesión.

public class LoginActivity extends AppCompatActivity implements RadioGroup.OnCheckedChangeListener, View.OnClickListener {
    private TextView tvword;
    private EditText etword ;
    private Button btnforget;
    private CheckBox ckremember;
    private EditText etphone;
    private RadioButton word;
    private RadioButton veryword;
    private Button btnremember;
    private String code;
    private String www = "123456";

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_login);


        word = findViewById(R.id.word);//密码登录
        veryword = findViewById(R.id.veryword);//验证码登录

        RadioGroup login = findViewById(R.id.login);//按钮控件
         etphone = findViewById(R.id.etphone);//手机号
         etword = findViewById(R.id.etword);//输入的密码
         tvword = findViewById(R.id.tvword);//密码登录
         btnforget = findViewById(R.id.btnforget);//忘记密码
         ckremember = findViewById(R.id.ckremember);//记住密码
         btnremember = findViewById(R.id.btnremember);//登录

        etphone.addTextChangedListener(new HideTextWatcher(etphone,11));
        etword.addTextChangedListener(new HideTextWatcher(etword,6));

        btnforget.setOnClickListener(this);//忘记密码
        btnremember.setOnClickListener(this);//登录
        //给login设置单选监听器
        login.setOnCheckedChangeListener(this);
    }

    @Override
    public void onCheckedChanged(RadioGroup group, int checkedId) {
        switch (checkedId){
            case R.id.word:
                tvword.setText(getString(R.string.login_password));
                etword.setHint(getString(R.string.input_new_password));
                btnforget.setText(getString(R.string.forget_password));
                ckremember.setVisibility(View.VISIBLE);
            break;


            case R.id.veryword:
                tvword.setText(getString(R.string.verifycode));
                etword.setHint(getString(R.string.input_verifycode));
                btnforget.setText(getString(R.string.get_verifycode));
                ckremember.setVisibility(View.GONE);
            break;

        }
    }


    @Override
    public void onClick(View v) {
        String phone = etphone.getText().toString();
        switch (v.getId()){
            case R.id.btnforget:
                if(phone.length()<11){
                    Toast.makeText(this, "请输入正确的手机号码", Toast.LENGTH_SHORT).show();
                    return;
                }
                if(word.isChecked()){
                    Intent intent = new Intent(this,ForgetWordActivity.class);
                    intent.putExtra("phone",phone);
                   startActivityForResult(intent,100);

                }else  if(veryword.isChecked()){
                    code  = String.format("%06d",new Random().nextInt(999999));
                    AlertDialog.Builder builder = new AlertDialog.Builder(this);
                    builder.setTitle("请记住验证码");
                    builder.setMessage("手机号:"+phone+"\t,本次的验证码"+code+"\t,请输入验证码");
                    builder.setPositiveButton("好的",null);
                    AlertDialog dialog = builder.create();
                    dialog.show();
                }
            break;

            case R.id.btnremember:
                if(word.isChecked()){
                    if(www.equals(etword.getText().toString())){
                       loginSuccess();
                    }else {
                        Toast.makeText(this, "请输入正确的密码", Toast.LENGTH_SHORT).show();
                        return;
                    }
                }else if(veryword.isChecked()) {
                    if(code.equals(etword.getText().toString())){
                        loginSuccess();
                    }else {
                        Toast.makeText(this, "请输入正确的验证码", Toast.LENGTH_SHORT).show();
                        return;
                    }
                }

            break;

        }
    }

    private void loginSuccess() {
        String desc =String.format("您的手机号码是%s ,恭喜您通过登录验证,点击'确定'按钮返回上个页面",etphone.getText().toString());
        AlertDialog.Builder builder = new AlertDialog.Builder(this);
        builder.setTitle("登录成功");
        builder.setMessage(desc);
        builder.setPositiveButton("确定返回", ( dialog, which)-> {
            finish();
        });
        AlertDialog.Builder builder1 = builder.setNegativeButton("继续看看", ( dialog, which)-> {
            startActivity(new Intent(this,MainActivity.class));
        });


        AlertDialog dialog = builder.create();
        dialog.show();
    }


    //会自动接收目标页面回传的值
    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        super.onActivityResult(requestCode, resultCode, data);

        if(requestCode == 100 && resultCode == 200 ){
            String revalue = data.getStringExtra("msg");
            www=revalue;
        }
    }


    //隐藏输入法
    private class HideTextWatcher implements TextWatcher {
        private int maxLength;
        private EditText et;
        public HideTextWatcher(EditText etphone, int i) {
            this.et=etphone;
            this.maxLength=i;
        }

        @Override
        public void beforeTextChanged(CharSequence s, int start, int count, int after) {

        }

        @Override
        public void onTextChanged(CharSequence s, int start, int before, int count) {

        }

        @Override
        public void afterTextChanged(Editable s) {
            //隐藏输入法
           if(s.toString().length() ==maxLength){
               ViewTuil.hidekey(LoginActivity.this,et);
           }
        }
    }
}

3. Regrese a la página de inicio de sesión (ingrese el método onCreate de MainActivity)

        findViewById(R.id.ret).setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                finish();
            }
        });

4. Escribe una página de contraseña olvidada

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    tools:context=".ForgetWordActivity">


    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="horizontal">

        <TextView
            android:layout_width="wrap_content"
            android:layout_height="@dimen/lsize"
            android:text="@string/input_password"
            android:textSize="@dimen/csize"
            android:textColor="@color/black"
            android:padding="15dp" />
        <EditText
            android:id="@+id/one"
            android:layout_width="0dp"
            android:layout_height="@dimen/lsize"
            android:layout_weight="1"
            android:inputType="numberPassword"
            android:hint="@string/input_new_password_hint"/>
    </LinearLayout>


    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="horizontal">

        <TextView
            android:layout_width="wrap_content"
            android:layout_height="@dimen/lsize"
            android:text="@string/input_new_password"
            android:textSize="@dimen/csize"
            android:textColor="@color/black"

            android:padding="15dp" />
        <EditText
            android:id="@+id/two"
            android:layout_width="0dp"
            android:layout_height="@dimen/lsize"
            android:layout_weight="1"
            android:inputType="numberPassword"
            android:hint="@string/input_new_password_again"/>
    </LinearLayout>

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="horizontal">

        <TextView
            android:layout_width="wrap_content"
            android:layout_height="@dimen/lsize"
            android:text="@string/verifycode2"
            android:textSize="@dimen/csize"
            android:textColor="@color/black"
            android:padding="15dp" />

        <EditText
            android:id="@+id/code"
            android:layout_width="0dp"
            android:layout_height="@dimen/lsize"
            android:layout_weight="1"
            android:hint="@string/input_new_password_again"/>
        <Button
            android:id="@+id/btncode"
            android:layout_width="0dp"
            android:layout_weight="1"
            android:layout_height="wrap_content"
            android:text="@string/get"/>

    </LinearLayout>

    <Button
        android:id="@+id/modify"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="@string/done"
        android:textColor="@color/black"
        android:textSize="@dimen/csize"></Button>

</LinearLayout>

5. Escriba la lógica para olvidar la contraseña (mi salto de parámetros usa el método anterior, que no ha caducado)

public class ForgetWordActivity extends AppCompatActivity implements View.OnClickListener {
    private EditText one;
    private EditText two;
    private EditText code;
    private String phone;
    private String verycode="";

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_forget_word);


          one = findViewById(R.id.one);//密码
          two = findViewById(R.id.two);//确认密码
          code = findViewById(R.id.code);//验证码

        Button   btncode = findViewById(R.id.btncode);//获取验证码
        Button   modify = findViewById(R.id.modify);//修改


        btncode.setOnClickListener(this);
        modify.setOnClickListener(this);
    }


    @Override
    public void onClick(View v) {
        phone = getIntent().getStringExtra("phone");

          switch (v.getId()){
            case R.id.btncode:
                verycode  = String.format("%06d",new Random().nextInt(999999));//生成6位数的随机数
                AlertDialog.Builder builder = new AlertDialog.Builder(this);
                builder.setTitle("请记住验证码");//设置弹出的标题
                builder.setMessage("手机号:"+phone+"\n本次的验证码"+verycode+"\n请输入验证码");//设置弹出的内容
                builder.setPositiveButton("好的",null);//设置弹出的按钮
                AlertDialog dialog = builder.create();
                dialog.show();//弹出
                break;
            case R.id.modify:

                String one1 = one.getText().toString();
                String two1 = two.getText().toString(); 
                if(one1.length()<6){
                    Toast.makeText(this, "您的密码长度必须大于等于6位", Toast.LENGTH_SHORT).show();
                    return;
                }
                if(!one1.equals(two1)){
                    System.out.println("不一致");
                    Toast.makeText(this, "您两次输入的密码不一致", Toast.LENGTH_SHORT).show();
                    return;
                }
                if("".equals(verycode)){
                    Toast.makeText(this, "请您先获取验证码", Toast.LENGTH_SHORT).show();
                    return;
                }


                if(!verycode.equals(code.getText().toString())){
                    System.out.println("验证码错误");
                    Toast.makeText(this, "请输入正确的验证码", Toast.LENGTH_SHORT).show();
                    return;
                }

                Toast.makeText(this, "密码修改成功", Toast.LENGTH_SHORT).show();
                Intent intent = new Intent();
                intent.putExtra("msg",one1);

                //携带数据回到源页面
                setResult(200,intent);
                //已经回去了
                finish();
                break;
        }
    }
}

Cambie la página principal a LoginActivity

Si la página principal no encaja, puedes agregar el siguiente código para que se adapte automáticamente al tamaño de la pantalla.

getWindow().getDecorView().setSystemUiVisibility(
        View.SYSTEM_UI_FLAG_FULLSCREEN|
                View.SYSTEM_UI_FLAG_HIDE_NAVIGATION
        | View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY);

Gráfico de visualización de efectos

1. Inicio de sesión con contraseña (contraseña inicial)

2. Inicie sesión con código de verificación

3. Olvidé mi contraseña