Android6.0以上绘制系统级悬浮窗异常 permission denied for window type 2002

最新推荐文章于 2025-06-13 11:16:21 发布

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#异常

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本文详细解析了系统警报窗权限（TYPE_SYSTEM_ALERT）的功能及其使用场景，该权限允许应用创建并显示覆盖于所有其他应用之上的窗口，适用于系统级用户交互。文章还提供了针对不同Android版本的权限检查与申请代码示例。

官方介绍

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

Note: 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().

Protection level: signature

Constant Value: "android.permission.SYSTEM_ALERT_WINDOW"

解决代码

//权限判断
        if (Build.VERSION.SDK_INT >= 23) {
            if(!Settings.canDrawOverlays(getApplicationContext())) {
                //启动Activity让用户授权
                Intent intent = new Intent(Settings.ACTION_MANAGE_OVERLAY_PERMISSION);
                startActivity(intent);
                return;
            } else {
                //执行6.0以上绘制代码
            }
        } else {
            //执行6.0以下绘制代码
        }