How to capture a screenshot that bypasses `LayoutParams.FLAG_SECURE`?

##### Rationale I want to capture a window-specific screenshot of com.android.settings.Settings$DevelopmentSettingsDashboardActivity > "SIM Status (sim slot $n)" (in order to augment my answer at [revisions/260314/3](https://android.stackexchange.com/revisions/260314/3#:~:text=18-,Method,-If%20using%20com.google.android.dialer%2C)) . ##### Problem However, not even using adb permits me, since [adb exec-out screencap -p > file.png](https://stackoverflow.com/revisions/31401447/5#:~:text=adb%20exec%2Dout%20screencap%20%2Dp%20%3E%20test.png) creates an empty file when on that activity due to it having LayoutParams.FLAG_SECURE set (per file): ~~~YAML $HOME/file.png: empty ~~~ To confirm that that flag is the culprit, a filled file is created when focused on an activity without LayoutParams.FLAG_SECURE set (per file): ~~~YAML $HOME/file.png: PNG image data, 1224 x 2700, 8-bit/color RGBA, non-interlaced ~~~ Consequently, how can I bypass this restriction? I don't care how low-level I have to go, insofar as I'm not forced to solder to a UART connector... ##### Tangential I'm not the sole person to want this, per [reddit.com/r/AndroidQuestions/comments/1fynmkc](https://www.reddit.com/r/AndroidQuestions/comments/1fynmkc/how_to_force_a_screenshot_even_in_an_app_that/?utm_source=share&utm_medium=web3x&utm_name=web3xcss&utm_term=1#:~:text=melbournesummer-,How%20to%20force%20a%20screenshot%20even%20in%20an%20app%20that%20won 't%20allow%20it?,-Looking%20For%20Suggestions): > How to force a screenshot even in an app that won't allow it?