?一.添加别名指定主activity

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.zl.myapplication">

    <application
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:roundIcon="@mipmap/ic_launcher_round"
        android:supportsRtl="true"
        android:theme="@style/AppTheme">
        <activity android:name=".MainActivity" >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />
                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>


        <!--88会员节专属Activity别名-->
        <activity-alias
            android:name=".tag_12"
            android:enabled="false"
            android:icon="@mipmap/ic_launcher_88"
            android:targetActivity=".MainActivity">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />
                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity-alias>

        <!--双11专属Activity别名-->
        <activity-alias
            android:name=".tag_11"
            android:enabled="false"
            android:icon="@mipmap/ic_launcher_11_11"
            android:targetActivity=".MainActivity">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />
                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity-alias>
    </application>

</manifest>

二.判断时间切换图标

    //检查图标并更换
    public void updateIcon() {
        mPackageManager = getApplicationContext().getPackageManager();
        //获取当前的ComponentName
        ComponentName currentName = getComponentName();
        if (isDouble11() && !currentName.getClassName().equals("com.zl.myapplication.tag_11")) {
            ComponentName double11 = new ComponentName(getBaseContext(), "com.zl.myapplication.tag_11");
            disableComponent(currentName);
            enableComponent(double11);
            Log.e("2020", "双11");
        } else if (isDouble12() && !currentName.getClassName().equals("com.zl.myapplication.tag_12")) {
            ComponentName double12 = new ComponentName(getBaseContext(), "com.zl.myapplication.tag_12");
            disableComponent(currentName);
            enableComponent(double12);
            Log.e("2020", "双12");
        }
    }

    //是否双11期间
    public boolean isDouble11() {
        Calendar calendar = Calendar.getInstance();
        calendar.set(2020, 10 - 1, 1);
        long startTime = calendar.getTime().getTime();
        calendar.set(2020, 11 - 1, 11);
        long endTime = calendar.getTime().getTime();
        long nowTime = System.currentTimeMillis();
        if (startTime < nowTime && nowTime < endTime) {
            return true;
        }
        return false;
    }

    //是否双12期间
    public boolean isDouble12() {
        Calendar calendar = Calendar.getInstance();
        calendar.set(2020, 12 - 1, 1);
        long startTime = calendar.getTime().getTime();
        calendar.set(2020, 12 - 1, 12);
        long endTime = calendar.getTime().getTime();
        long nowTime = System.currentTimeMillis();
        if (startTime < nowTime && nowTime < endTime) {
            return true;
        }
        return false;
    }

    //启用组件
    public void enableComponent(ComponentName componentName) {
        mPackageManager.setComponentEnabledSetting(componentName,
                PackageManager.COMPONENT_ENABLED_STATE_ENABLED, PackageManager.DONT_KILL_APP);
    }

    //隐藏组件
    public void disableComponent(ComponentName componentName) {
        mPackageManager.setComponentEnabledSetting(componentName,
                PackageManager.COMPONENT_ENABLED_STATE_DISABLED, PackageManager.DONT_KILL_APP);
    }

http://www.all.com/files/Articles/416/0/159/159618_20210618144948896.jpg? 提取码：6kqe