动态修改app的icon、应用名、和入口

1.修改manifest，增添第二入口类TestAlias

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

    <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:exported="true"
            android:label="哈哈哈"
            android:name=".MainActivity">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
        <activity
            android:name=".TestAlias"
            android:exported="true" >
        </activity>
        <activity-alias
            android:enabled="false"
            android:icon="@drawable/timg"
            android:label="@string/app_name"
            android:targetActivity=".TestAlias"
            android:name=".TestAlias">
            <intent-filter>
                <action android:name="android.intent.action.MAIN"/>
                <category android:name="android.intent.category.LAUNCHER"/>
            </intent-filter>
        </activity-alias>
      
    </application>

</manifest>
主要是下面
 <activity
            android:name=".TestAlias"
            android:exported="true" >
        </activity>
        <activity-alias
            android:enabled="false"
            android:icon="@drawable/timg"
            android:label="@string/app_name"
            android:targetActivity=".TestAlias"
            android:name=".TestAlias">
            <intent-filter>
                <action android:name="android.intent.action.MAIN"/>
                <category android:name="android.intent.category.LAUNCHER"/>
            </intent-filter>
        </activity-alias>

2.在ACTIVITY调用如下方法

 private void changeIcon() {
        PackageManager pm = getApplicationContext().getPackageManager();
        System.out.println(getComponentName());
        //去除旧图标，不去除的话会出现2个App图标
        pm.setComponentEnabledSetting(getComponentName(),
                PackageManager.COMPONENT_ENABLED_STATE_DISABLED,
                PackageManager.DONT_KILL_APP);
        //显示新图标
        pm.setComponentEnabledSetting(new ComponentName(
                        getBaseContext(),
                        "com.test.liwei.TestAlias"),//此处包名需要修改
                PackageManager.COMPONENT_ENABLED_STATE_ENABLED,
                PackageManager.DONT_KILL_APP);
    }