ERROR:debug\AndroidManifest.xml:14: AAPT: error: resource mipmap/ic_launcher not found.

<uses-sdk
    android:minSdkVersion="18"
    android:targetSdkVersion="22" />

<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />

<application
    android:allowBackup="true"
    android:appComponentFactory="androidx.core.app.CoreComponentFactory"
    android:debuggable="true"
    android:icon="@mipmap/ic_launcher"
    android:label="@string/app_name"
    android:roundIcon="@mipmap/ic_launcher_round"
    android:supportsRtl="true"
    android:testOnly="true"
    android:theme="@style/Theme.MusicOnline"
    android:usesCleartextTraffic="false" >
    <activity
        android:name="com.example.musiconline.activity.MainActivity"
        android:exported="true"
        android:theme="@android:style/Theme.Black.NoTitleBar" >
        <intent-filter>
            <action android:name="android.intent.action.MAIN" />

            <category android:name="android.intent.category.LAUNCHER" />
        </intent-filter>
    </activity>

    <service android:name="com.example.musiconline.service.MusicService" />
</application>

1.clear project，再重新编译
2. invalidate cache/Restart