提醒对话框和页面跳转

概述主页面<?xmlversion="1.0"encoding="utf-8"?><LinearLayoutxmlns:android="http://schemas.android.com/apkes/android"xmlns:app="http://schemas.android.com/apkes-auto"xmlns:tools="http://schem

主页面

<?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=".MainActivity">    <FrameLayout        androID:ID="@+ID/content"        androID:layout_wIDth="match_parent"        androID:layout_height="0dp"        androID:layout_weight="0">    </FrameLayout>    <RadioGroup        androID:layout_wIDth="match_parent"        androID:layout_height="wrap_content"        androID:layout_margintop="40dp"        androID:orIEntation="horizontal">    <Radiobutton        androID:ID="@+ID/rb_1"        androID:layout_wIDth="wrap_content"        androID:layout_height="wrap_content"        androID:layout_weight="1"        androID:textSize="15dp"        androID:textcolor="#8E8433"        androID:layout_marginleft="20dp"        androID:text="密码登录"        />        <Radiobutton            androID:ID="@+ID/rb_2"            androID:layout_wIDth="wrap_content"            androID:layout_height="wrap_content"            androID:layout_weight="1"            androID:textcolor="#8E8433"            androID:textSize="15dp"            androID:layout_marginRight="20dp"            androID:text="验证码登录"            androID:onClick="jumpToMainActivity2"            />    </RadioGroup>    <linearLayout        androID:layout_wIDth="wrap_content"        androID:layout_height="wrap_content"        androID:orIEntation="horizontal"        androID:layout_marginleft="20dp"        androID:layout_marginRight="20dp"        androID:layout_margintop="40dp"        androID:gravity="center_vertical"        >        <TextVIEw            androID:layout_wIDth="90dp"            androID:layout_height="wrap_content"            androID:text="账号:"            androID:textcolor="#D30F64"            androID:textSize="25sp"            />        <EditText            androID:ID="@+ID/et_account"            androID:layout_wIDth="269dp"            androID:layout_height="50dp"            androID:layout_marginleft="10dp"            androID:background="@drawable/edit_text_bg"            androID:hint="请输入手机号或用户名"            androID:inputType="text"            androID:paddingleft="5dp"            androID:textSize="18sp" />    </linearLayout>    <linearLayout        androID:layout_wIDth="wrap_content"        androID:layout_height="wrap_content"        androID:orIEntation="horizontal"        androID:layout_marginleft="20dp"        androID:layout_marginRight="20dp"        androID:layout_margintop="40dp"        androID:gravity="center_vertical"        >        <TextVIEw            androID:layout_wIDth="90dp"            androID:layout_height="wrap_content"            androID:textcolor="#D30F64"            androID:text="密码："            androID:textSize="25sp"            />        <EditText            androID:ID="@+ID/et_password"            androID:layout_wIDth="180dp"            androID:layout_height="50dp"            androID:layout_marginleft="10dp"            androID:background="@drawable/edit_text_bg"            androID:hint="请输入密码"            androID:inputType="numberPassword"            androID:paddingleft="5dp"            androID:textSize="18sp" />        <button            androID:layout_wIDth="match_parent"            androID:layout_height="50dp"            androID:text="忘记密码"            androID:textSize="13dp"            androID:onClick="jumpToMainActivity3"            />    </linearLayout>    <linearLayout        androID:layout_wIDth="match_parent"        androID:layout_height="wrap_content"        androID:orIEntation="horizontal"        androID:gravity="center"        androID:layout_margintop="20dp"        androID:layout_marginleft="20dp"        androID:layout_marginRight="20dp"        >        <CheckBox            androID:layout_wIDth="wrap_content"            androID:layout_height="wrap_content"            androID:text="记住密码" />        <CheckBox            androID:layout_wIDth="wrap_content"            androID:layout_height="wrap_content"            androID:text="自动登录"            androID:layout_marginleft="40dp"            />    </linearLayout>    <button        androID:ID="@+ID/btn_Login"        androID:layout_wIDth="match_parent"        androID:layout_height="wrap_content"        androID:text="登录"        androID:textSize="25sp"        /></linearLayout>

手机验证码页面

<?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=".MainActivity2">    <RadioGroup        androID:layout_wIDth="match_parent"        androID:layout_height="wrap_content"        androID:layout_margintop="40dp"        androID:orIEntation="horizontal">        <Radiobutton            androID:layout_wIDth="wrap_content"            androID:layout_height="wrap_content"            androID:layout_weight="1"            androID:textSize="15dp"            androID:textcolor="#8E8433"            androID:layout_marginleft="20dp"            androID:text="密码登录"            androID:onClick="jumpToMainActivity"            />        <Radiobutton            androID:layout_wIDth="wrap_content"            androID:layout_height="wrap_content"            androID:layout_weight="1"            androID:textSize="15dp"            androID:textcolor="#8E8433"            androID:layout_marginRight="20dp"            androID:text="验证码登录"/>    </RadioGroup>    <linearLayout        androID:layout_wIDth="wrap_content"        androID:layout_height="wrap_content"        androID:orIEntation="horizontal"        androID:layout_marginleft="20dp"        androID:layout_marginRight="20dp"        androID:layout_margintop="40dp"        androID:gravity="center_vertical"        >        <TextVIEw            androID:layout_wIDth="100dp"            androID:layout_height="wrap_content"            androID:text="手机号码:"            androID:textcolor="#D30F64"            androID:textSize="20sp"            />        <EditText            androID:ID="@+ID/et_phone"            androID:layout_wIDth="250dp"            androID:layout_height="50dp"            androID:layout_marginleft="10dp"            androID:background="@drawable/edit_text_bg"            androID:hint="请输入11位数手机号"            androID:inputType="number"            androID:paddingleft="5dp"            androID:textSize="18sp" />    </linearLayout>    <linearLayout        androID:layout_wIDth="wrap_content"        androID:layout_height="wrap_content"        androID:orIEntation="horizontal"        androID:layout_marginleft="20dp"        androID:layout_marginRight="20dp"        androID:layout_margintop="40dp"        androID:gravity="center_vertical"        >        <TextVIEw            androID:layout_wIDth="100dp"            androID:layout_height="wrap_content"            androID:text="验证码："            androID:textcolor="#D30F64"            androID:textSize="20dp"            />        <EditText            androID:ID="@+ID/et_confirm"            androID:layout_wIDth="180dp"            androID:layout_height="50dp"            androID:layout_marginleft="10dp"            androID:background="@drawable/edit_text_bg"            androID:hint="请输入验证码"            androID:inputType="number"            androID:paddingleft="5dp"            androID:textSize="18sp" />        <button            androID:ID="@+ID/btn_getNum"            androID:layout_wIDth="match_parent"            androID:layout_height="50dp"            androID:text="获取验证码"            androID:textSize="11dp"            androID:onClick="jumpToAlertDialogActivity"            />    </linearLayout>    <linearLayout        androID:layout_wIDth="match_parent"        androID:layout_height="wrap_content"        androID:orIEntation="horizontal"        androID:gravity="center"        androID:layout_margintop="20dp"        androID:layout_marginleft="20dp"        androID:layout_marginRight="20dp"        >        <CheckBox            androID:layout_wIDth="wrap_content"            androID:layout_height="wrap_content"            androID:text="记住密码" />        <CheckBox            androID:layout_wIDth="wrap_content"            androID:layout_height="wrap_content"            androID:text="自动登录"            androID:layout_marginleft="40dp"            />    </linearLayout>    <button        androID:ID="@+ID/btn_Login1"        androID:layout_wIDth="match_parent"        androID:layout_height="wrap_content"        androID:text="登录"        androID:textSize="25sp"        /></linearLayout>

找回密码页面

<linearLayout xmlns:androID="http://schemas.androID.com/apk/res/androID"    androID:layout_wIDth="match_parent"    androID:layout_height="match_parent"    androID:orIEntation="vertical"    androID:padding="5dp" >    <relativeLayout        androID:layout_wIDth="match_parent"        androID:layout_height="50dp" >        <TextVIEw            androID:ID="@+ID/tv_password_first"            androID:layout_wIDth="wrap_content"            androID:layout_height="match_parent"            androID:gravity="center"            androID:text="输入新密码："            androID:textcolor="@color/black"            androID:textSize="17sp" />        <EditText            androID:ID="@+ID/et_password_first"            androID:layout_wIDth="match_parent"            androID:layout_height="match_parent"            androID:layout_marginBottom="5dp"            androID:layout_margintop="5dp"            androID:layout_toRightOf="@+ID/tv_password_first"            androID:gravity="left|center"            androID:hint="请输入新密码"            androID:inputType="numberPassword"            androID:maxLength="11"            androID:textcolor="@color/black"            androID:textSize="17sp" />    </relativeLayout>    <relativeLayout        androID:layout_wIDth="match_parent"        androID:layout_height="50dp" >        <TextVIEw            androID:ID="@+ID/tv_password_second"            androID:layout_wIDth="wrap_content"            androID:layout_height="match_parent"            androID:gravity="center"            androID:text="确认新密码："            androID:textcolor="@color/black"            androID:textSize="17sp" />        <EditText            androID:ID="@+ID/et_password_second"            androID:layout_wIDth="match_parent"            androID:layout_height="match_parent"            androID:layout_marginBottom="5dp"            androID:layout_margintop="5dp"            androID:layout_toRightOf="@+ID/tv_password_second"            androID:gravity="left|center"            androID:hint="请再次输入新密码"            androID:inputType="numberPassword"            androID:maxLength="11"            androID:textcolor="@color/black"            androID:textSize="17sp" />    </relativeLayout>    <relativeLayout        androID:layout_wIDth="match_parent"        androID:layout_height="50dp" >        <TextVIEw            androID:ID="@+ID/tv_verifycode"            androID:layout_wIDth="wrap_content"            androID:layout_height="match_parent"            androID:gravity="center"            androID:text="　　验证码："            androID:textcolor="@color/black"            androID:textSize="17sp" />        <relativeLayout            androID:layout_wIDth="match_parent"            androID:layout_height="match_parent"            androID:layout_toRightOf="@+ID/tv_verifycode" >            <EditText                androID:ID="@+ID/et_verifycode"                androID:layout_wIDth="match_parent"                androID:layout_height="match_parent"                androID:layout_marginBottom="5dp"                androID:layout_margintop="5dp"                androID:gravity="left|center"                androID:hint="请输入验证码"                androID:inputType="number"                androID:maxLength="6"                androID:textcolor="@color/black"                androID:textSize="17sp" />            <button                androID:ID="@+ID/btn_verifycode"                androID:layout_wIDth="wrap_content"                androID:layout_height="match_parent"                androID:layout_alignParentRight="true"                androID:layout_marginRight="-3dp"                androID:gravity="center"                androID:text="获取验证码"                androID:textcolor="@color/black"                androID:textSize="17sp" />        </relativeLayout>    </relativeLayout>    <button        androID:ID="@+ID/btn_confirm"        androID:layout_wIDth="match_parent"        androID:layout_height="wrap_content"        androID:text="确　　定"        androID:textcolor="@color/black"        androID:textSize="20sp" /></linearLayout>

MainActivity

package com.example.retrIEvepassword;import androIDx.appcompat.app.AppCompatActivity;import androIDx.fragment.app.FragmentActivity;import androID.app.AlertDialog;import androID.content.Intent;import androID.os.Bundle;import androID.text.TextUtils;import androID.util.Log;import androID.vIEw.VIEw;import androID.Widget.button;import androID.Widget.EditText;import androID.Widget.Toast;import java.util.Random;public class MainActivity extends AppCompatActivity implements VIEw.OnClickListener {    private static final String TAG = "tag";    private button btnLogin;    private EditText etAccount, etPassword;    String newPass,MPhone;    @OverrIDe    protected voID onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentVIEw(R.layout.activity_main);        getSupportActionbar().setTitle("用户名登录");        btnLogin = findVIEwByID(R.ID.btn_Login);        etAccount = findVIEwByID(R.ID.et_account);        etPassword = findVIEwByID(R.ID.et_password);        etAccount = findVIEwByID(R.ID.et_account);        btnLogin.setonClickListener(this);        newPass = getIntent().getStringExtra("new_password");        MPhone = getIntent().getStringExtra("phone");        Log.d(TAG, "onCreate: --------------"+newPass);        Log.d(TAG, "onCreate: --------------"+MPhone);    }    @OverrIDe    public voID onClick(VIEw v) {        String Account = etAccount.getText().toString();        String Pass = etPassword.getText().toString();        if(!Account.equals(MPhone)){            Toast.makeText(this, "用户名错误" , Toast.LENGTH_SHORT).show();        }else if(!Pass.equals(newPass)){            Toast.makeText(this, "新密码错误" , Toast.LENGTH_SHORT).show();        }        else {            Toast.makeText(this, "恭喜您！登陆成功" , Toast.LENGTH_SHORT).show();        }    }        public voID jumpToMainActivity2 (VIEw vIEw){            Intent intent = new Intent(this, MainActivity2.class);            startActivity(intent);        }        public voID jumpToMainActivity3 (VIEw vIEw){            String s = etAccount.getText().toString().trim();            Intent intent = new Intent(this, LoginForgetActivity.class);            intent.putExtra("phone", s);            startActivity(intent);        }}

验证码的Activity

package com.example.retrIEvepassword;import androIDx.appcompat.app.AppCompatActivity;import androID.content.Intent;import androID.os.Bundle;import androID.text.Editable;import androID.text.TextUtils;import androID.text.TextWatcher;import androID.util.Log;import androID.vIEw.VIEw;import androID.Widget.button;import androID.Widget.EditText;import androID.Widget.Toast;import com.example.retrIEvepassword.util.VIEwUtil;public class MainActivity2 extends AppCompatActivity implements VIEw.OnClickListener {    private static final String TAG = "tag";    private String confirm;    private EditText et_verConfirm,etPhone;    private button btnLogin;    @OverrIDe    protected voID onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentVIEw(R.layout.activity_main2);        getSupportActionbar().setTitle("验证码登录");        Intent intent = getIntent();        btnLogin = findVIEwByID(R.ID.btn_Login1);        etPhone = findVIEwByID(R.ID.et_phone);        et_verConfirm = findVIEwByID(R.ID.et_confirm);        if(intent != null){            confirm = intent.getStringExtra("data");            Log.d(TAG, "onCreate :----------------"+confirm);        }        // 给手机号码编辑框添加文本变化监听器        etPhone.addTextChangedListener(new MainActivity2.HIDeTextWatcher(etPhone, 11));        btnLogin.setonClickListener(this);    }    @OverrIDe    public voID onClick(VIEw v) {        String con = et_verConfirm.getText().toString();        String mPhone = etPhone.getText().toString();        if(mPhone != null && TextUtils.equals(con,confirm)){            Toast.makeText(MainActivity2.this,"恭喜您！登陆成功",Toast.LENGTH_LONG).show();        }else {            Toast.makeText(MainActivity2.this,"验证码错误！",Toast.LENGTH_LONG).show();        }    }    public voID jumpToAlertDialogActivity(VIEw vIEw) {        Intent intent = new Intent(this,AlertDialogActivity.class);        startActivity(intent);    }    private class HIDeTextWatcher implements TextWatcher {        private EditText mVIEw; // 声明一个编辑框对象        private int mMaxLength; // 声明一个最大长度变量        public HIDeTextWatcher(EditText v, int maxLength) {            super();            mVIEw = v;            mMaxLength = maxLength;        }        // 在编辑框的输入文本变化前触发        public voID beforeTextChanged(CharSequence s, int start, int count, int after) {}        // 在编辑框的输入文本变化时触发        public voID onTextChanged(CharSequence s, int start, int before, int count) {}        // 在编辑框的输入文本变化后触发        public voID afterTextChanged(Editable s) {            String str = s.toString(); // 获得已输入的文本字符串            // 输入文本达到11位（如手机号码），或者达到6位（如登录密码）时关闭输入法            if ((str.length() == 11 && mMaxLength == 11)) {                VIEwUtil.hIDeOneinputMethod(MainActivity2.this, mVIEw); // 隐藏输入法软键盘            }        }    }    public voID jumpToMainActivity(VIEw vIEw) {        Intent intent = new Intent(this,MainActivity.class);        startActivity(intent);    }}

忘记密码的Activity

package com.example.retrIEvepassword;import androIDx.appcompat.app.AppCompatActivity;import androID.app.Activity;import androID.app.AlertDialog;import androID.content.Intent;import androID.os.Bundle;import androID.vIEw.VIEw;import androID.Widget.EditText;import androID.Widget.Toast;import java.util.Random;public class LoginForgetActivity extends AppCompatActivity implements VIEw.OnClickListener {    private EditText et_password_first; // 声明一个编辑框对象    private EditText et_password_second; // 声明一个编辑框对象    private EditText et_verifyCode; // 声明一个编辑框对象    private String mVerifyCode; // 验证码    private String mPhone; // 手机号码    @OverrIDe    protected voID onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentVIEw(R.layout.activity_login_forget);        // 从布局文件中获取名叫et_password_first的编辑框        getSupportActionbar().setTitle("找回密码");        et_password_first = findVIEwByID(R.ID.et_password_first);        // 从布局文件中获取名叫et_password_second的编辑框        et_password_second = findVIEwByID(R.ID.et_password_second);        // 从布局文件中获取名叫et_verifycode的编辑框        et_verifyCode = findVIEwByID(R.ID.et_verifycode);        findVIEwByID(R.ID.btn_verifycode).setonClickListener(this);        findVIEwByID(R.ID.btn_confirm).setonClickListener(this);        // 从上一个页面获取要修改密码的手机号码        mPhone = getIntent().getStringExtra("phone");    }    @OverrIDe    public voID onClick(VIEw v) {        if (v.getID() == R.ID.btn_verifycode) { // 点击了“获取验证码”按钮            if (mPhone == null || mPhone.length() < 11) {                Toast.makeText(this, "请输入正确的手机号", Toast.LENGTH_SHORT).show();                return;            }            // 生成六位随机数字的验证码            mVerifyCode = String.format("%06d", new Random().nextInt(999999));            // 以下d出提醒对话框，提示用户记住六位验证码数字            AlertDialog.Builder builder = new AlertDialog.Builder(this);            builder.setTitle("请记住验证码");            builder.setMessage("手机号" + mPhone + "，本次验证码是" + mVerifyCode + "，请输入验证码");            builder.setPositivebutton("好的", null);            AlertDialog alert = builder.create();            alert.show(); // 显示提醒对话框        } else if (v.getID() == R.ID.btn_confirm) { // 点击了“确定”按钮            String password_first = et_password_first.getText().toString();            String password_second = et_password_second.getText().toString();            if (password_first.length() < 6 || password_second.length() < 6) {                Toast.makeText(this, "请输入正确的新密码", Toast.LENGTH_SHORT).show();                return;            }            if (!password_first.equals(password_second)) {                Toast.makeText(this, "两次输入的新密码不一致", Toast.LENGTH_SHORT).show();                return;            }            if (!et_verifyCode.getText().toString().equals(mVerifyCode)) {                Toast.makeText(this, "请输入正确的验证码", Toast.LENGTH_SHORT).show();            } else {                Toast.makeText(this, "密码修改成功", Toast.LENGTH_SHORT).show();                // 以下把修改好的新密码返回给上一个页面                Intent intent = new Intent(this,MainActivity.class); // 创建一个新意图                intent.putExtra("new_password", password_first); // 存入新密码                intent.putExtra("phone",mPhone);                startActivity(intent);            }        }    }}

总结

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