Android 记录锁屏的上层相关源码以及debug WindowManager

SettingsProvider

• frameworks/base/packages/SettingsProvider/res/values/defaults.xml

• device/rockchip/rk356x/overlay/frameworks/base/packages/SettingsProvider/res/values/defaults.xml

  //device的overlay会覆盖frameworks的SettingsProvider
  // 关于锁屏配置
  <integer name="def_screen_off_timeout">0x60000</integer>
  <bool name="def_lockscreen_disabled">false</bool>

KeyGuard

• frameworks/base/services/core/java/com/android/server/wm/RootWindowContainer.java

  final int type = attrs.type;
  // This function assumes that the contents of the default display are processed first
  // before secondary displays.
  final DisplayContent displayContent = w.getDisplayContent();
  if (displayContent != null && displayContent.isDefaultDisplay) {
  // While a dream or keyguard is showing, obscure ordinary application content on
  // secondary displays (by forcibly enabling mirroring unless there is other content
  // we want to show) but still allow opaque keyguard dialogs to be shown.
  if (w.isDreamWindow() || mWmService.mPolicy.isKeyguardShowing()) {
  mObscureApplicationContentOnSecondaryDisplays = true;
  }
  displayHasContent = true;
  } else if (displayContent != null &&
  (!mObscureApplicationContentOnSecondaryDisplays
  || (obscured && type == TYPE_KEYGUARD_DIALOG))) {
  // Allow full screen keyguard presentation dialogs to be seen.
  displayHasContent = true;
  }
  if ((privateflags & PRIVATE_FLAG_SUSTAINED_PERFORMANCE_MODE) != 0) {
  mSustainedPerformanceModeCurrent = true;
  }

FallbackHome

• frameworks/base/services/core/java/com/android/server/wm/WindowManagerService.java

  //box:skip FallbackHome to fix 2-3s black screen before launcher.
  if (!"box".equals(SystemProperties.get("ro.target.product"))) {
  if (!mBootAnimationStopped) {
  Trace.asyncTraceBegin(TRACE_TAG_WINDOW_MANAGER, "Stop bootanim", 0);
  // stop boot animation
  // formerly we would just kill the process, but we now ask it to exit so it
  // can choose where to stop the animation.
  SystemProperties.set("service.bootanim.exit", "1");
  mBootAnimationStopped = true;
  }

            if (!mForceDisplayEnabled && !checkBootAnimationCompleteLocked()) {
                ProtoLog.i(WM_DEBUG_BOOT, "performEnableScreen: Waiting for anim complete");
                return;
            }
  
            try {
                IBinder surfaceFlinger = ServiceManager.getService("SurfaceFlinger");
                if (surfaceFlinger != null) {
                    ProtoLog.i(WM_ERROR, "******* TELLING SURFACE FLINGER WE ARE BOOTED!");
                    Parcel data = Parcel.obtain();
                    data.writeInterfaceToken("android.ui.ISurfaceComposer");
                    surfaceFlinger.transact(IBinder.FIRST_CALL_TRANSACTION, // BOOT_FINISHED
                            data, null, 0);
                    data.recycle();
                }
            } catch (RemoteException ex) {
                ProtoLog.e(WM_ERROR, "Boot completed: SurfaceFlinger is dead!");
            }
        }
  

调试

• frameworks/base/services/core/java/com/android/server/wm/WindowManagerDebugConfig.java
  打开对应日志打印，来debug WindowManager

    static final String TAG_WM = "WindowManager";
  
    static final boolean DEBUG = false;
    static final boolean DEBUG_ANIM = false;
    static final boolean DEBUG_LAYOUT = false;
    static final boolean DEBUG_LAYERS = false;
    static final boolean DEBUG_INPUT = false;
    static final boolean DEBUG_INPUT_METHOD = false;
    static final boolean DEBUG_VISIBILITY = false;
    static final boolean DEBUG_CONFIGURATION = false;
    static final boolean DEBUG_STARTING_WINDOW_VERBOSE = false;
    static final boolean DEBUG_WALLPAPER = false;
    static final boolean DEBUG_WALLPAPER_LIGHT = false || DEBUG_WALLPAPER;
    static final boolean DEBUG_DRAG = false;
    static final boolean DEBUG_SCREENSHOT = false;
    static final boolean DEBUG_LAYOUT_REPEATS = false;
    static final boolean DEBUG_WINDOW_TRACE = false;