[TOC]

概述

去掉Launcher图标显示

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<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.noiconapp"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
    android:minSdkVersion="14"
    android:targetSdkVersion="14" />
<application
    android:allowBackup="true"
    android:icon="@drawable/ic_launcher"
    android:label="@string/app_name"
    android:theme="@style/AppTheme" >
    <activity
        android:name="com.example.noiconapp.MainActivity"
        android:label="@string/app_name" >
        <intent-filter>
            <action android:name="android.intent.action.MAIN" />
            <!-- 要想在桌面不显示图标，只需注释掉APP入口Activity中的下面这句即可，或者把下面的LAUNCHER改成DEFAULT也行 -->
            <!-- <category android:name="android.intent.category.LAUNCHER" /> -->
        </intent-filter>
    </activity>
</application>
</manifest>

创建无UI的App

AndroidManifest里面Application主题使用

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android:theme="@android:style/Theme.NoDisplay"
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<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="@android:style/Theme.NoDisplay">
 
        <activity android:name=".MainActivity">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />
 
                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
 
        <service
            android:name=".ServerService"
            android:enabled="true"
            android:exported="true" />
 
    </application>

MainActivity继承Activity

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class MainActivity : Activity() {

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        //setContentView(R.layout.activity_main)
        startService(Intent(this, ServerService::class.java))
        finish()
    }
}