应用程序图标缺失/未出现android studio _android

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我有这个布局，在清单中，我放置了行android:icon="@drawable/ic_launcher"，但没有显示应用程序图标...
布局内容：

< RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" android:paddingLeft="@dimen/activity_horizontal_margin" android:paddingRight="@dimen/activity_horizontal_margin" android:paddingTop="@dimen/activity_vertical_margin" android:paddingBottom="@dimen/activity_vertical_margin" tools:context=".java0" tools:ignore="MergeRootFrame" android:screenOrientation="portrait" android:icon="@drawable/ic_launcher" android:background="#ffff7e00"> < /RelativeLayout>

清单的内容：

< ?xml version="1.0" encoding="utf-8"?> < manifest xmlns:android="http://schemas.android.com/apk/res/android" package="theapp.application.app.theapp" > < !-- Include required permissions for Google Mobile Ads to run--> < uses-permission android:name="android.permission.INTERNET"/> < uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/> < !--Agregado: Pantallas--> < supports-screens android:resizeable="true" android:smallScreens="true" android:normalScreens="true" android:largeScreens="true" android:xlargeScreens="true" android:anyDensity="true"/> < application android:screenOrientation="portrait" android:allowBackup="true" android:icon="@drawable/ic_launcher" android:label="@string/app_name" android:theme="@style/AppTheme"> < !--This meta-data tag is required to use Google Play Services.--> < meta-data android:name="com.google.android.gms.version" android:value="https://www.songbingjia.com/android/@integer/google_play_services_version" /> < activity android:screenOrientation="portrait" android:name=".java0" android:label="@string/app_name" > < intent-filter> < action android:name="android.intent.action.MAIN" /> < category android:name="android.intent.category.LAUNCHER" /> < /intent-filter> < /activity> < !--Include the AdActivity configChanges and theme. --> < activity android:name="com.google.android.gms.ads.AdActivity" android:configChanges="keyboard|keyboardHidden|orientation|screenLayout|uiMode|screenSize|smallestScreenSize" android:theme="@android:style/Theme.Translucent" /> < activity android:screenOrientation="portrait" android:name=".java1" android:label="@string/app_name" > < intent-filter> < action android:name="android.intent.action.MAIN" /> < category android:name="android.intent.category.DEFAULT" /> < /intent-filter> < /activity> < activity android:screenOrientation="portrait" android:name=".java2" android:label="@string/app_name" > < intent-filter> < action android:name="android.intent.action.MAIN" /> < category android:name="android.intent.category.DEFAULT" /> < /intent-filter> < /activity> < /application> < /manifest>

答案你的manifest结构应该像Android Studio

< ?xml version="1.0" encoding="utf-8"?> < manifest xmlns:android="http://schemas.android.com/apk/res/android" package="com.org.yourpackage" > < application android:allowBackup="true" android:icon="@drawable/ic_launcher" android:label="@string/app_name" android:theme="@style/AppTheme" > < activity android:name=".YourStartingActivity" android:label="@string/app_name" > < intent-filter> < action android:name="android.intent.action.MAIN" /> < category android:name="android.intent.category.LAUNCHER" /> < /intent-filter> < /activity> < /application> < /manifest>

注意：对于透明背景，您应该使用