配置成系统Service

AndroidManifest.xml

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.lenovo.cava"
    coreApp="true"
    android:sharedUserId="android.uid.system" >

    <!-- <uses-sdk android:targetSdkVersion="24" android:minSdkVersion="24"/> -->

    <!-- <uses-permission android:name="android.permission.SYSTEM_OVERLAY_WINDOW" /> -->
    <uses-permission android:name="android.permission.SYSTEM_ALERT_WINDOW" />
    <uses-permission android:name="android.permission.MANAGE_ACTIVITY_STACKS" />
    <uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED"/>
    <uses-permission android:name="android.permission.GET_TASKS"/>
    <uses-permission android:name="android.permission.REORDER_TASKS"/>
    <uses-permission android:name="android.permission.MANAGE_APP_TOKENS"/>
    <uses-permission android:name="android.permission.DEVICE_POWER"/>
    <uses-permission android:name="android.permission.WAKE_LOCK"/>
    <uses-permission android:name="android.permission.REMOVE_TASKS"/>
    <uses-permission android:name="android.permission.VIBRATE"/>
    <uses-permission android:name="android.permission.WRITE_SETTINGS" />
    <uses-permission android:name="android.permission.WRITE_SECURE_SETTINGS" />
    <uses-permission android:name="android.permission.REAL_GET_TASKS" />
    <uses-permission android:name="android.permission.KILL_BACKGROUND_PROCESSES" />
    <uses-permission android:name="android.permission.FORCE_STOP_PACKAGES" />
    <uses-permission android:name="android.permission.BLUETOOTH" />
    <uses-permission android:name="android.permission.BLUETOOTH_ADMIN" />

    <!-- send sms permisson-->
    <uses-permission android:name="android.permission.SEND_SMS" />
    <uses-permission android:name="android.permission.RECEIVE_SMS" />

    <!-- camera permission -->
    <uses-feature android:name="android.hardware.camera" android:required="true" />
    <uses-feature android:name="android.hardware.camera.autofocus" android:required="false"/>
    <uses-permission android:name="android.permission.CAMERA" />
    <!-- SD card write and read permission -->
    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
    <uses-permission android:name="android.permission.MOUNT_UNMOUNT_FILESYSTEMS"/>
    <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/>

    <application
        android:debuggable="false"
        android:persistent="true"
        android:allowBackup="false"
        android:process="com.lenovo.cava"
        android:exported="true"
        android:directBootAware="true">

        <service
            android:name="CavaService"
            android:exported="true" >
        </service>

    </application>
</manifest>