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android.permission

android.permission.SYSTEM_ALERT_WINDOW

Top / android.permission.SYSTEM_ALERT_WINDOW

Allows an application to open windows using the type WindowManager.LayoutParams.TYPE_SYSTEM_ALERT, shown on top of all other applications. Very few applications should use this permission; these windows are intended for system-level interaction with the user.

http://developer.android.com/reference/android/Manifest.permission.html#SYSTEM_ALERT_WINDOW

必要

• WindowManager.LayoutParams.TYPE_SYSTEM_OVERLAY
• WindowManager.LayoutParams.TYPE_SYSTEM_ERROR
• WindowManager.LayoutParams.TYPE_SYSTEM_ALERT
• WindowManager.LayoutParams.TYPE_PRIORITY_PHONE?
• WindowManager.LayoutParams.TYPE_PHONE?

チェック

• WindowManagerService.addWindow? -> PhoneWindowManager.checkAddPermission?

パーミッション「SYSTEM_ALERT_WINDOW」を使うアプリが起動していると、APKインストール画面の「インストール」ボタンが押せない

• http://droidbiyori.tumblr.com/post/16354167891/system-alert-window-apk
• https://blog.lookout.com/blog/2010/12/09/android-touch-event-hijacking/

参考

• http://tools.oesf.biz/android-4.4.0_r1.0/xref/frameworks/base/policy/src/com/android/internal/policy/impl/PhoneWindowManager.java#1277

Android/APIレベル23 (Android 6.0)

• If the app targets API level 23 or higher, the app user must explicitly grant this permission to the app through a permission management screen. The app requests the user's approval by sending an intent with action ACTION_MANAGE_OVERLAY_PERMISSION. The app can check whether it has this authorization by calling Settings.canDrawOverlays?().

関連

• android.permission.INTERNAL_SYSTEM_WINDOW