网站开发基本要求有关电子商务网站建设的论文

一、需求背景

每逢重要佳节，很多应用启动图标会自动更新为对应佳节的图标，应用无需更新。

二、效果图

更新后的启动图标和应用名称

三、实现流程

Android app只能替换内置的icon，因此需要提前将logo图标放入App资源文件件里
实际项目App更新桌面启动图标由服务器端控制，可以在App启动页里请求全局配置接口，根据接口返回的是否更新启动图标字段值进行处理。

大多数都是用activity-alias方式更新启动图标和应用名称，但是谷歌建议新建activity继承启动页的activity，新建的activity里面是空的。

下面的代码采用新建activity继承启动页的activity方式实现动态更新App启动图标和应用名称

3.1 AndroidManifest.xml代码

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"xmlns:tools="http://schemas.android.com/tools"><applicationandroid:allowBackup="true"android:dataExtractionRules="@xml/data_extraction_rules"android:fullBackupContent="@xml/backup_rules"android:icon="@mipmap/ic_launcher"android:label="@string/app_name"android:roundIcon="@mipmap/ic_launcher_round"android:supportsRtl="true"android:theme="@style/Theme.Test"tools:targetApi="31"><activityandroid:name=".ui.activity.LauncherActivity"android:exported="true"><intent-filter><action android:name="android.intent.action.MAIN" /><category android:name="android.intent.category.LAUNCHER" /></intent-filter></activity><!--   更改启动图标和应用名称     --><!--        <activity-alias--><!--            android:name=".ui.activity.NewMainActivity"--><!--            android:enabled="false"--><!--            android:exported="true"--><!--            android:icon="@mipmap/ic_launcher_shlx"--><!--            android:label="@string/app_name2"--><!--            android:targetActivity=".ui.activity.MainActivity">--><!--            <intent-filter>--><!--                <action android:name="android.intent.action.MAIN" />--><!--                <category android:name="android.intent.category.LAUNCHER" />--><!--            </intent-filter>--><!--        </activity-alias>--><activityandroid:name=".ui.activity.LauncherActivityNew"android:enabled="false"android:exported="true"android:icon="@mipmap/ic_launcher_mid_autumn_festival"android:label="@string/app_name2"android:targetActivity=".ui.activity.MainActivity"><intent-filter><action android:name="android.intent.action.MAIN" /><category android:name="android.intent.category.LAUNCHER" /></intent-filter></activity><activityandroid:name=".ui.activity.MainActivity"android:launchMode="standard"android:screenOrientation="portrait" /><activityandroid:name=".ui.activity.SettingActivity"android:launchMode="standard"android:screenOrientation="portrait" /></application></manifest>

注意：

3.2 activity_launcher.xml代码

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout 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:id="@+id/main"android:layout_width="match_parent"android:layout_height="match_parent"tools:context=".ui.activity.LauncherActivity"><TextViewandroid:id="@+id/tvSetLogo"android:layout_width="match_parent"android:layout_height="50dp"android:layout_margin="16dp"android:background="@color/black"android:gravity="center"android:text="启动页"android:textColor="@color/white"android:textSize="20sp"app:layout_constraintBottom_toBottomOf="parent"app:layout_constraintEnd_toEndOf="parent"app:layout_constraintStart_toStartOf="parent"app:layout_constraintTop_toTopOf="parent" /></androidx.constraintlayout.widget.ConstraintLayout>

3.3 LauncherActivity.kt代码

package com.example.test.ui.activityimport android.content.ComponentName
import android.content.Intent
import android.content.pm.PackageManager
import android.os.Bundle
import androidx.appcompat.app.AppCompatActivity
import com.example.test.R
import com.example.test.utils.LogUtilopen class LauncherActivity : AppCompatActivity() {private lateinit var mPackageManager: PackageManageroverride fun onCreate(savedInstanceState: Bundle?) {super.onCreate(savedInstanceState)
//        enableEdgeToEdge()setContentView(R.layout.activity_launcher)
//        ViewCompat.setOnApplyWindowInsetsListener(findViewById(R.id.main)) { v, insets ->
//            val systemBars = insets.getInsets(WindowInsetsCompat.Type.systemBars())
//            v.setPadding(systemBars.left, systemBars.top, systemBars.right, systemBars.bottom)
//            insets
//        }//        LogUtil.i("获取到的路径 simpleName：${ LunchActivity::class.java.simpleName}")
//        LogUtil.i("获取到的路径 packageName：${ LunchActivity::class.java.`package`.name}")
//        LogUtil.i("获取到的路径 name：${ LunchActivity::class.java.name}")/*获取到的路径 simpleName：LunchActivity获取到的路径 packageName：com.example.test.ui.activity获取到的路径 name：com.example.test.ui.activity.LunchActivity*/initData()initView()initEvent()if (this::class.java.simpleName.equals(LauncherActivityNew::class.java.simpleName)) {LogUtil.i("没有 执行 updateLauncherIcon")startActivity(Intent(this, MainActivity::class.java))finish()} else {updateLauncherIcon()}}private fun initData() {mPackageManager = applicationContext.packageManager}private fun initView() {}private fun initEvent() {}private fun updateLauncherIcon() {LogUtil.i("执行了 updateLauncherIcon")
//            var festervalIcon = ComponentName(baseContext, "com.example.test.ui.activity.LunchActivity")var festervalIcon = ComponentName(baseContext, LauncherActivityNew::class.java.name)enableComponent(festervalIcon)disableComponent(componentName)startMainActivity()}/*PackageManager.DONT_KILL_APPPackageManager.SYNCHRONOUS*///启用组件private fun enableComponent(componentName: ComponentName) {mPackageManager.setComponentEnabledSetting(componentName,PackageManager.COMPONENT_ENABLED_STATE_ENABLED, PackageManager.DONT_KILL_APP)}//隐藏组件private fun disableComponent(componentName: ComponentName) {mPackageManager.setComponentEnabledSetting(componentName,PackageManager.COMPONENT_ENABLED_STATE_DISABLED, PackageManager.DONT_KILL_APP)}private fun startMainActivity() {val intent = Intent(this, MainActivity::class.java)intent.addFlags(Intent.FLAG_ACTIVITY_NEW_DOCUMENT or Intent.FLAG_ACTIVITY_MULTIPLE_TASK)this.startActivity(intent)finish()}
}

3.4 LauncherActivityNew.kt代码

class LauncherActivityNew : LauncherActivity() {
}

3.5 activity_main.xml代码

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout 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:id="@+id/main"android:layout_width="match_parent"android:layout_height="match_parent"tools:context=".ui.activity.LauncherActivity"><TextViewandroid:id="@+id/tvSetLogo"android:layout_width="match_parent"android:layout_height="50dp"android:layout_margin="16dp"android:background="@color/black"android:gravity="center"android:text="打开设置页面"android:textColor="@color/white"android:textSize="20sp"app:layout_constraintBottom_toBottomOf="parent"app:layout_constraintEnd_toEndOf="parent"app:layout_constraintStart_toStartOf="parent"app:layout_constraintTop_toTopOf="parent" /></androidx.constraintlayout.widget.ConstraintLayout>

3.6 MainActivity.kt代码

package com.example.test.ui.activityimport android.content.Intent
import android.os.Bundle
import android.widget.TextView
import androidx.appcompat.app.AppCompatActivity
import com.example.test.Rclass MainActivity : AppCompatActivity(R.layout.activity_main) {override fun onCreate(savedInstanceState: Bundle?) {super.onCreate(savedInstanceState)findViewById<TextView>(R.id.tvSetLogo).setOnClickListener {startActivity(Intent(this,SettingActivity::class.java))}}
}

3.7 activity_setting.xml代码

<?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"><TextViewandroid:layout_width="match_parent"android:layout_height="50dp"android:layout_gravity="center"android:gravity="center"android:text="设置"android:textColor="@color/black"android:textSize="20sp" /></LinearLayout>

3.8 SettingActivity.kt代码

package com.example.test.ui.activityimport android.os.Bundle
import androidx.appcompat.app.AppCompatActivity
import com.example.test.Rclass SettingActivity: AppCompatActivity(R.layout.activity_setting) {override fun onCreate(savedInstanceState: Bundle?) {super.onCreate(savedInstanceState)}
}