app/src/main/AndroidManifest.xml

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

    <!-- 悬浮窗权限 -->
    <uses-permission android:name="android.permission.SYSTEM_ALERT_WINDOW"/>
    <uses-permission android:name="android.permission.SYSTEM_OVERLAY_WINDOW"/>

    <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="@style/AppTheme">

        <!-- 主界面 -->
        <activity
            android:name=".ui.activity.MainActivity"
            android:launchMode="singleTask" >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

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

        <!-- 辅助服务 -->
        <service
            android:name=".service.MAccessibilityService"
            android:label="@string/service_name"
            android:permission="android.permission.BIND_ACCESSIBILITY_SERVICE">
            <intent-filter>
                <action android:name="android.accessibilityservice.AccessibilityService" />
            </intent-filter>
            <meta-data
                android:name="android.accessibilityservice"
                android:resource="@xml/accessibility"/>
        </service>

        <!-- 辅助服务广播接收器 -->
        <receiver android:name=".receiver.MAccessibilityServiceReceiver">
            <intent-filter>
                <action android:name="android.intent.action.SWITCH" />
                <action android:name="android.intent.action.CLOSE" />
            </intent-filter>
        </receiver>

    </application>

</manifest>