Android 10 TV系统 默认强制app横屏显示

电视类 投影仪类 系统app默认横屏显示

需要默认强制app横屏显示：

需要在framework 源码中修改

framework/base/services/core/java/com/android/server/wm/WindowManagerService.java

@Overridepublic void setWindowingMode(int displayId, int mode) {if (!checkCallingPermission(INTERNAL_SYSTEM_WINDOW, "setWindowingMode()")) {throw new SecurityException("Requires INTERNAL_SYSTEM_WINDOW permission");}synchronized (mGlobalLock) {final DisplayContent displayContent = getDisplayContentOrCreate(displayId, null);if (displayContent == null) {Slog.w(TAG_WM, "Attempted to set windowing mode to a display that does not exist: "+ displayId);return;}int lastWindowingMode = displayContent.getWindowingMode();mDisplayWindowSettings.setWindowingModeLocked(displayContent, mode);reconfigureDisplayLocked(displayContent);if (lastWindowingMode != displayContent.getWindowingMode()) {// reconfigure won't detect this change in isolation because the windowing mode is// already set on the display, so fire off a new config now.mH.removeMessages(H.SEND_NEW_CONFIGURATION);final long origId = Binder.clearCallingIdentity();try {// direct call since lock is shared.sendNewConfiguration(displayId);} finally {Binder.restoreCallingIdentity(origId);}// Now that all configurations are updated, execute pending transitionsdisplayContent.executeAppTransition();}}}

reconfigureDisplayLocked 为锁定屏幕显示

void reconfigureDisplayLocked(@NonNull DisplayContent displayContent) {reconfigureDisplayLocked(displayContent, false);}void reconfigureDisplayLocked(@NonNull DisplayContent displayContent, boolean forced) {if (!displayContent.isReady()) {return;}displayContent.configureDisplayPolicy();displayContent.setLayoutNeeded();boolean configChanged = displayContent.updateOrientationFromAppTokens();final Configuration currentDisplayConfig = displayContent.getConfiguration();mTempConfiguration.setTo(currentDisplayConfig);displayContent.computeScreenConfiguration(mTempConfiguration);configChanged |= currentDisplayConfig.diff(mTempConfiguration) != 0;if (configChanged || forced) {displayContent.mWaitingForConfig = true;startFreezingDisplayLocked(0 /* exitAnim */,0 /* enterAnim */, displayContent);displayContent.sendNewConfiguration();}mWindowPlacerLocked.performSurfacePlacement();}

通过源码分析 调用displayContent.updateOrientationFromAppTokens() 来获取当前屏幕的方向

设置屏幕方向：

修改：

— a/services/core/java/com/android/server/wm/DisplayContent.java
+++ b/services/core/java/com/android/server/wm/DisplayContent.java
@@ -1323,7 +1323,7 @@ class DisplayContent extends WindowContainer<DisplayContent.DisplayChildWindowCo

 private boolean updateOrientationFromAppTokens(boolean forceUpdate) {

•    final int req = getOrientation();
  

•    final int req = Surface.ROTATION_0;if (req != mLastOrientation || forceUpdate) {mLastOrientation = req;mDisplayRotation.setCurrentOrientation(req);