2022-10-26学习内容

1.案例-找回密码-登录界面

1.1activity_login_main.xml

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

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

        <RadioButton
            android:id="@+id/rb_password"
            android:layout_width="0dp"
            android:layout_weight="1"
            android:layout_height="match_parent"
            android:checked="true"
            android:text="@string/login_by_password"
            android:textSize="@dimen/common_font_size"
            android:textColor="@color/black"/>

        <RadioButton
            android:id="@+id/rb_verifycode"
            android:layout_width="0dp"
            android:layout_weight="1"
            android:layout_height="match_parent"
            android:text="@string/login_by_verifycode"
            android:textSize="@dimen/common_font_size"
            android:textColor="@color/black"/>

    </RadioGroup>

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

        <TextView
            android:layout_width="wrap_content"
            android:layout_height="match_parent"
            android:gravity="center"
            android:text="@string/phone_number"
            android:textColor="@color/black" />

        <EditText
            android:id="@+id/et_phone"
            android:layout_width="0dp"
            android:layout_weight="1"
            android:layout_height="match_parent"
            android:layout_marginTop="5dp"
            android:layout_marginBottom="5dp"
            android:background="@drawable/editext_selector"
            android:hint="@string/input_phone_number"
            android:inputType="number"
            android:maxLength="11"
            android:textColor="@color/grey"
            android:textSize="@dimen/common_font_size"/>

    </LinearLayout>

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

        <TextView
            android:id="@+id/tv_password"
            android:layout_width="wrap_content"
            android:layout_height="match_parent"
            android:gravity="center"
            android:text="@string/login_password"
            android:textColor="@color/black" />

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

            <EditText
                android:id="@+id/et_password"
                android:layout_width="match_parent"
                android:layout_height="match_parent"
                android:layout_marginTop="5dp"
                android:layout_weight="1"
                android:background="@drawable/editext_selector"
                android:hint="@string/input_password"
                android:inputType="numberPassword"
                android:layout_marginBottom="5dp"
                android:maxLength="11"
                android:textColor="@color/grey"
                android:textSize="@dimen/common_font_size" />

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

        </RelativeLayout>

    </LinearLayout>

    <CheckBox
        android:id="@+id/ck_remember"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:button="@drawable/checkbox_selector"
        android:text="@string/remember_password"
        android:textColor="@color/black"
        android:textSize="@dimen/common_font_size" />

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

</LinearLayout>

1.2LoginMainActivity.java

package com.example.chapter05;

import androidx.appcompat.app.AppCompatActivity;

import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.CheckBox;
import android.widget.EditText;
import android.widget.RadioGroup;
import android.widget.TextView;

public class LoginMainActivity extends AppCompatActivity implements RadioGroup.OnCheckedChangeListener {

    private TextView tv_password;
    private EditText et_password;
    private Button btn_forget;
    private CheckBox ck_remember;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_login_main);
        RadioGroup rg_login = findViewById(R.id.rg_login);
        tv_password = findViewById(R.id.tv_password);
        et_password = findViewById(R.id.et_password);
        btn_forget = findViewById(R.id.btn_forget);
        ck_remember = findViewById(R.id.ck_remember);
        // 给rg_login设置单选监听器
        rg_login.setOnCheckedChangeListener(this);
    }

    @Override
    public void onCheckedChanged(RadioGroup group, int checkedId) {
        switch (checkedId) {
            // 选择了密码登录
            case R.id.rb_password:
                tv_password.setText(getString(R.string.login_password));
                et_password.setHint(getString(R.string.input_password));
                btn_forget.setText(getString(R.string.forget_password));
                ck_remember.setVisibility(View.VISIBLE);
                break;
            // 选择了验证码登录
            case R.id.rb_verifycode:
                tv_password.setText(getString(R.string.verifycode));
                et_password.setHint(getString(R.string.input_verifycode));
                btn_forget.setText(getString(R.string.get_verifycode));
                ck_remember.setVisibility(View.GONE);
                break;
        }
    }
}

1.3strings.xml

<resources>
    <string name="app_name">chapter05</string>
    <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="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>
</resources>

1.4效果：