android应用程序菜单中未显示应用程序图标

当我从android studio运行我的应用程序时，应用程序正在安装，但应用程序菜单中没有显示图标。它只显示在主屏幕上。我在manifiest没有改变任何事情。一切都很好，突然这个问题开始了。我挣扎了3个小时。真烦人。如果你看到这些图片，你就会明白

请参见第一张图片中缺少节拍框图标。为什么会这样

我的理发师代码：

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

    <uses-sdk android:minSdkVersion="16" />

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

    <application
        android:allowBackup="true"
        android:icon="@drawable/download"
        android:label="@string/app_name"
        android:theme="@style/AppTheme" >
        <meta-data
            android:name="com.google.android.gms.version"
            android:value="@integer/google_play_services_version" />

        <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:name=".MainActivity"
            android:label="@string/app_name"
            android:launchMode="singleTask"
            android:screenOrientation="portrait" >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />
                <action android:name="android.intent.action.MEDIA_MOUNTED" />

                <data android:scheme="file" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
        <activity
            android:name=".Player"
            android:label="@string/title_activity_player"
            android:launchMode="singleTask"
            android:screenOrientation="portrait" >
        </activity>

        <service
            android:name=".EgineBackground"
            android:enabled="true" >
        </service>

        <activity
            android:name=".Statistics"
            android:label="@string/title_activity_statistics"
            android:launchMode="singleTask"
            android:screenOrientation="portrait" >
        </activity>
        <activity
            android:name=".AlbumItems"
            android:label="@string/title_activity_album_items"
            android:launchMode="singleTask"
            android:screenOrientation="portrait" >
        </activity>
        <activity
            android:name=".ArtistAlbum"
            android:label="@string/title_activity_artist_album"
            android:launchMode="singleTask"
            android:screenOrientation="portrait" >
        </activity>
        <activity
            android:name=".AnimationTest"
            android:label="@string/title_activity_animation_test"
            android:launchMode="singleTask"
            android:screenOrientation="portrait" >
        </activity>
        <activity
            android:name=".DataBase"
            android:label="@string/title_activity_data_base"
            android:launchMode="singleTask"
            android:screenOrientation="portrait" >
        </activity>
        <activity
            android:name=".EqualizerLocal"
            android:label="@string/title_activity_equalizer"
            android:launchMode="singleTask"
            android:screenOrientation="portrait" >
        </activity>

        <receiver
            android:name=".EgineBackground$PreviousButtonListener"
            android:enabled="true" >
        </receiver>
        <receiver
            android:name=".EgineBackground$NextButtonListener"
            android:enabled="true" >
        </receiver>
        <receiver
            android:name=".EgineBackground$PlayButtonListener"
            android:enabled="true" >
        </receiver>
        <receiver
            android:name=".EgineBackground$CancelButtonListener"
            android:enabled="true" >
        </receiver>
        <receiver
            android:name=".NewAppWidget$NextButtonListenerNotification"
            android:enabled="true" >
        </receiver>
        <receiver
            android:name=".NewAppWidget$PlayButtonListenerNotification"
            android:enabled="true" >
        </receiver>
        <receiver
            android:name=".NewAppWidget$GoToApp"
            android:enabled="true" >
        </receiver>
        <receiver
            android:name=".EgineBackground$CallDetector"
            android:enabled="true" >
            <intent-filter>
                <action android:name="android.intent.action.PHONE_STATE" />
            </intent-filter>
        </receiver>

        <activity
            android:name=".Themes"
            android:label="@string/title_activity_themes" >
        </activity>
        <activity
            android:name=".sleep"
            android:label="@string/title_activity_sleep" >
        </activity>
        <activity
            android:name=".Favourite"
            android:label="@string/title_activity_favourite" >
        </activity>
        <activity
            android:name=".PhoneMemory"
            android:label="@string/title_activity_phone_memory" >
        </activity>

        <receiver android:name=".NewAppWidget" >
            <intent-filter>
                <action android:name="android.appwidget.action.APPWIDGET_UPDATE" />
            </intent-filter>

            <meta-data
                android:name="android.appwidget.provider"
                android:resource="@xml/new_app_widget_info" />
        </receiver>

        <activity
            android:name=".MyFolders"
            android:label="@string/title_activity_my_folders" >
        </activity>
        <activity
            android:name=".CardMemory"
            android:label="@string/title_activity_card_memory" >
        </activity>
        <activity
            android:name=".PlayList"
            android:label="@string/title_activity_play_list" >
        </activity>
        <activity
            android:name=".PlaylistDetails"
            android:label="@string/title_activity_playlist_details" >
        </activity>
        <activity
            android:name=".SongDetails"
            android:label="@string/title_activity_song_details" >
        </activity>
        <activity
            android:name=".SearchBox"
            android:label="@string/title_activity_search_box"
            android:windowSoftInputMode="adjustPan" >
        </activity>
        <activity
            android:name=".SearchAlbum"
            android:label="@string/title_activity_search_album" >
        </activity>
        <activity
            android:name=".About"
            android:label="@string/title_activity_about" >
        </activity>
    </application>

</manifest>

问题是

，您不能在启动器活动中逻辑地使用此标记

---

设置“活动”是否应为对数据块执行的默认操作（中按）的选项。设置此选项将在对某些数据执行操作时向用户隐藏未设置此选项的任何活动。请注意，这是正常的-不是-启动操作时在Intent中设置的-它用于包中指定的Intent筛选器。

发布您的清单xml@Kartheek请参阅代码共享您的MainActivity代码。为什么指定为MainActivity安装android.intent.action.MEDIA_？@Kartheek以更新媒体数据库。如果我删除任何音乐，它仍然显示该音乐。这就是为什么。你能告诉我另一件事吗？点击android studio中的run按钮，它会自动启动应用程序。但现在它只是安装，不启动应用程序。为什么会这样？这也是那个标签的原因吗？可能是这个问题救了我一天。