论应用首页的返回按钮的设计

1：页面布局就一个返回的图标，使用的是imageView
<?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">
   <LinearLayout
       android:layout_width="match_parent"
       android:layout_height="wrap_content"
       android:orientation="horizontal">

       <ImageView
           android:id="@+id/return_button" 
  //自定义控件建议自己设置控件的宽度和高度
           android:layout_width="39dp"
           android:layout_height="33dp"
         //设置背景颜色
           android:background="@drawable/bth_ripple_mask"
           android:clickable="true"
         //设置的图标样式，一个svg形式的返回控件
           app:srcCompat="@drawable/ic_resource_return" />
   </LinearLayout>
</LinearLayout>

@drawable/bth_ripple_mask的样式

<?xml version="1.0" encoding="utf-8"?>
<ripple
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:color="@android:color/darker_gray"><!--点击之后的颜色 必须要-->
    <item
        android:id="@android:id/mask"
        android:drawable="@android:color/white"/>
</ripple>

@drawable/ic_resource_return图标的设计

<vector xmlns:android="http://schemas.android.com/apk/res/android"
    android:width="24dp"
    android:height="24dp"
    android:viewportWidth="48"
    android:viewportHeight="48">
    <path
        android:pathData="M12.9998,8L6,14L12.9998,21"
        android:strokeLineJoin="round"
        android:strokeWidth="4"
        android:fillColor="#00000000"
        android:strokeColor="#333"
        android:strokeLineCap="round"/>
    <path
        android:pathData="M6,14H28.9938C35.8768,14 41.7221,19.6204 41.9904,26.5C42.2739,33.7696 36.2671,40 28.9938,40H11.9984"
        android:strokeLineJoin="round"
        android:strokeWidth="4"
        android:fillColor="#00000000"
        android:strokeColor="#333"
        android:strokeLineCap="round"/>
</vector>

最后一步，登陆逻辑的实现

package com.example.example;

import androidx.appcompat.app.AppCompatActivity;

import android.content.Intent;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.ImageView;

public class LoginActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_login);
        //写返回功能
        ImageView backOfBirthday = (ImageView) findViewById(R.id.return_button);
        backOfBirthday.setOnClickListener(new View.OnClickListener()

        {
            @Override
            public void onClick (View v){
                Intent intentReturnUp = new Intent(LoginActivity.this, MainActivity.class);
                startActivity(intentReturnUp);
            }
        });
    }
}