探索抖音禁止录屏

FLAG_SECURE

在播放付费短剧内容是,执行 adb shell dumpsys window windows | grep -A 30 -E 'Window #|mCurrentFocus' 发现当前 window 设置了 flag SECURE. 其定义在 /WindowManager.LayoutParams (opens new window) 中, 此 flag: Added in API level 1.

/** Window flag: treat the content of the window as secure, preventing
 * it from appearing in screenshots or from being viewed on non-secure
 * displays.
 *
 * <p>See {@link android.view.Display#FLAG_SECURE} for more details about
 * secure surfaces and secure displays.
 */
public static final int FLAG_SECURE             = 0x00002000;

--
Window #13 Window{8c106d1 u0 com.ss.android.ugc.aweme/com.ss.android.ugc.aweme.playlet.videodetail.PlayletVideoPlayActivity}:
  mDisplayId=0 rootTaskId=11350 mSession=Session{7a1d86 21483:u0a10517} mClient=android.os.BinderProxy@cea31f8
  mOwnerUid=10517 showForAllUsers=false package=com.ss.android.ugc.aweme appop=NONE
  mAttrs={(0,0)(fillxfill) sim={adjust=nothing forwardNavigation} ty=BASE_APPLICATION hwFlags=#0 isEmuiStyle=0 statusBarColor=#0 navigationBarColor=#ff000000 wanim=0x10302fe
    fl=KEEP_SCREEN_ON LAYOUT_IN_SCREEN SECURE LAYOUT_INSET_DECOR SPLIT_TOUCH HARDWARE_ACCELERATED DRAWS_SYSTEM_BAR_BACKGROUNDS
    pfl=FIT_INSETS_CONTROLLED
    vsysui=LAYOUT_STABLE LAYOUT_FULLSCREEN
    fitSides=}
  Requested w=720 h=1600 mLayoutSeq=25844
  mBaseLayer=21000 mSubLayer=0    mToken=ActivityRecord{70e4774 u0 com.ss.android.ugc.aweme/.playlet.videodetail.PlayletVideoPlayActivity t11350}
  mActivityRecord=ActivityRecord{70e4774 u0 com.ss.android.ugc.aweme/.playlet.videodetail.PlayletVideoPlayActivity t11350}
  mAppDied=false    drawnStateEvaluated=true    mightAffectAllDrawn=true
  mViewVisibility=0x0 mHaveFrame=true mObscured=false
  mSeq=0 mSystemUiVisibility=0x500
  mGivenContentInsets=[0,0][0,0] mGivenVisibleInsets=[0,0][0,0]
  mFullConfiguration={1.15 ?mcc?mnc [zh_CN_#Hans] ldltr sw360dp w360dp h776dp 320dpi nrml long port finger -keyb/v/h -nav/h winConfig={ mBounds=Rect(0, 0 - 720, 1600) mAppBounds=Rect(0, 48 - 720, 1600) mWindowingMode=fullscreen mDisplayWindowingMode=fullscreen mActivityType=standard mAlwaysOnTop=undefined mRotation=ROTATION_0} suim:1 fontWeightScale:100changeUserFlag:0 s.1 fontWeightAdjustment=0}
  mLastReportedConfiguration={1.15 ?mcc?mnc [zh_CN_#Hans] ldltr sw360dp w360dp h776dp 320dpi nrml long port finger -keyb/v/h -nav/h winConfig={ mBounds=Rect(0, 0 - 720, 1600) mAppBounds=Rect(0, 48 - 720, 1600) mWindowingMode=fullscreen mDisplayWindowingMode=fullscreen mActivityType=standard mAlwaysOnTop=undefined mRotation=ROTATION_0} suim:1 fontWeightScale:100changeUserFlag:0 s.1 fontWeightAdjustment=0}
  mHasSurface=true isReadyForDisplay()=true mWindowRemovalAllowed=false
  Frames: containing=[0,0][720,1600] parent=[0,0][720,1600]
      display=[0,0][720,1600]
      content=[0,48][720,1600] visible=[0,48][720,1600]
      decor=[0,0][720,1600]
  mFrame=[0,0][720,1600] last=[0,0][720,1600]
    cutout=DisplayCutout{insets=Rect(0, 48 - 0, 0) waterfall=Insets{left=0, top=0, right=0, bottom=0} boundingRect={Bounds=[Rect(0, 0 - 0, 0), Rect(310, 0 - 410, 48), Rect(0, 0 - 0, 0), Rect(0, 0 - 0, 0)]}} last=DisplayCutout{insets=Rect(0, 48 - 0, 0) waterfall=Insets{left=0, top=0, right=0, bottom=0} boundingRect={Bounds=[Rect(0, 0 - 0, 0), Rect(310, 0 - 410, 48), Rect(0, 0 - 0, 0), Rect(0, 0 - 0, 0)]}}
  Cur insets: content=[0,48][0,0] visible=[0,48][0,0] stable=[0,48][0,0]    Lst insets: content=[0,48][0,0] visible=[0,48][0,0] stable=[0,48][0,0]
    surface=[0,0][0,0]
  WindowStateAnimator{d0be7e6 com.ss.android.ugc.aweme/com.ss.android.ugc.aweme.playlet.videodetail.PlayletVideoPlayActivity}:
    mSurface=Surface(name=com.ss.android.ugc.aweme/com.ss.android.ugc.aweme.playlet.videodetail.PlayletVideoPlayActivity)/@0x69fceef
    Surface: shown=true layer=0 alpha=1.0 rect=(0.0,0.0) 720 x 1600 transform=(1.0, 0.0, 1.0, 0.0)
    mDrawState=HAS_DRAWN       mLastHidden=false
    mEnterAnimationPending=false      mSystemDecorRect=[0,0][720,1600] mLastClipRect=[0,0][720,1600]
--
Window #14 Window{13235d u0 com.ss.android.ugc.aweme/com.ss.android.ugc.aweme.detail.ui.DetailActivity}:
  mDisplayId=0 rootTaskId=11350 mSession=Session{7a1d86 21483:u0a10517} mClient=android.os.BinderProxy@9aff934
  mOwnerUid=10517 showForAllUsers=false package=com.ss.android.ugc.aweme appop=NONE
  mAttrs={(0,0)(fillxfill) sim={adjust=nothing forwardNavigation} ty=BASE_APPLICATION hwFlags=#0 isEmuiStyle=0 statusBarColor=#0 navigationBarColor=#ff000000 wanim=0x10302fe
    fl=KEEP_SCREEN_ON LAYOUT_IN_SCREEN SECURE LAYOUT_INSET_DECOR SPLIT_TOUCH HARDWARE_ACCELERATED DRAWS_SYSTEM_BAR_BACKGROUNDS
    pfl=FIT_INSETS_CONTROLLED
    vsysui=LAYOUT_STABLE LAYOUT_FULLSCREEN
    fitSides=}
  Requested w=720 h=1600 mLayoutSeq=25834
  mBaseLayer=21000 mSubLayer=0    mToken=ActivityRecord{4894621 u0 com.ss.android.ugc.aweme/.detail.ui.DetailActivity t11350}
  mActivityRecord=ActivityRecord{4894621 u0 com.ss.android.ugc.aweme/.detail.ui.DetailActivity t11350}
  mAppDied=false    drawnStateEvaluated=true    mightAffectAllDrawn=true
  mViewVisibility=0x8 mHaveFrame=true mObscured=true
  mSeq=0 mSystemUiVisibility=0x500
  mGivenContentInsets=[0,0][0,0] mGivenVisibleInsets=[0,0][0,0]
  mFullConfiguration={1.15 ?mcc?mnc [zh_CN_#Hans] ldltr sw360dp w360dp h776dp 320dpi nrml long port finger -keyb/v/h -nav/h winConfig={ mBounds=Rect(0, 0 - 720, 1600) mAppBounds=Rect(0, 48 - 720, 1600) mWindowingMode=fullscreen mDisplayWindowingMode=fullscreen mActivityType=standard mAlwaysOnTop=undefined mRotation=ROTATION_0} suim:1 fontWeightScale:100changeUserFlag:0 s.1 fontWeightAdjustment=0}
  mLastReportedConfiguration={1.15 ?mcc?mnc [zh_CN_#Hans] ldltr sw360dp w360dp h776dp 320dpi nrml long port finger -keyb/v/h -nav/h winConfig={ mBounds=Rect(0, 0 - 720, 1600) mAppBounds=Rect(0, 48 - 720, 1600) mWindowingMode=fullscreen mDisplayWindowingMode=fullscreen mActivityType=standard mAlwaysOnTop=undefined mRotation=ROTATION_0} suim:1 fontWeightScale:100changeUserFlag:0 s.1 fontWeightAdjustment=0}
  mHasSurface=false isReadyForDisplay()=false mWindowRemovalAllowed=false
  Frames: containing=[0,0][720,1600] parent=[0,0][720,1600]
      display=[0,0][720,1600]
      content=[0,48][720,1600] visible=[0,48][720,1600]
      decor=[0,0][720,1600]
  mFrame=[0,0][720,1600] last=[0,0][720,1600]
    cutout=DisplayCutout{insets=Rect(0, 48 - 0, 0) waterfall=Insets{left=0, top=0, right=0, bottom=0} boundingRect={Bounds=[Rect(0, 0 - 0, 0), Rect(310, 0 - 410, 48), Rect(0, 0 - 0, 0), Rect(0, 0 - 0, 0)]}} last=DisplayCutout{insets=Rect(0, 48 - 0, 0) waterfall=Insets{left=0, top=0, right=0, bottom=0} boundingRect={Bounds=[Rect(0, 0 - 0, 0), Rect(310, 0 - 410, 48), Rect(0, 0 - 0, 0), Rect(0, 0 - 0, 0)]}}
  Cur insets: content=[0,48][0,0] visible=[0,48][0,0] stable=[0,48][0,0]    Lst insets: content=[0,48][0,0] visible=[0,48][0,0] stable=[0,48][0,0]
    surface=[0,0][0,0]
  WindowStateAnimator{8d3acf7 com.ss.android.ugc.aweme/com.ss.android.ugc.aweme.detail.ui.DetailActivity}:
    mDrawState=NO_SURFACE       mLastHidden=true
    mEnterAnimationPending=false      mSystemDecorRect=[0,0][720,1600] mLastClipRect=[0,0][720,1600]
    mTmpSize=[0,0][720,1600]
  mForceSeamlesslyRotate=false seamlesslyRotate: pending=null finishedFrameNumber=0