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前言

由于平板项目没有 Gsensor，需要将所有第三方APP强制横屏， 无视 android:screenOrientation=“portrait” 属性

效果图

修改前

修改后

修改源码

alps\frameworks\base\services\core\java\com\android\server\wm\DisplayRotation.java

@Surface.Rotation-    private int mRotation;+    private int mRotation = 3; @Override       boolean updateRotationUnchecked(boolean forceUpdate) {
           //add+        if (true) {
   +            return true;+        }//end        final int displayId = mDisplayContent.getDisplayId();        if (!forceUpdate) {
               if (mDeferredRotationPauseCount > 0) {
                   // Rotation updates have been paused temporarily. Defer the update until updates                // have been resumed.                ProtoLog.v(WM_DEBUG_ORIENTATION, "Deferring rotation, rotation is paused.");                return false;            }

alps\frameworks\base\services\core\java\com\android\server\wm\DisplayContent.java

@ScreenOrientation    @Override    int getOrientation() {
   		 //add+        if (true) {
   +            return ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE;+        }//end        mLastOrientationSource = null;        if (mIgnoreRotationForApps) {
               return SCREEN_ORIENTATION_USER;        }        if (mWmService.mDisplayFrozen) {
               if (mWmService.mPolicy.isKeyguardLocked()) {
                   // Use the last orientation the while the display is frozen with the keyguard                // locked. This could be the keyguard forced orientation or from a SHOW_WHEN_LOCKED                // window. We don't want to check the show when locked window directly though as                // things aren't stable while the display is frozen, for example the window could be                // momentarily unavailable due to activity relaunch.                ProtoLog.v(WM_DEBUG_ORIENTATION,                        "Display id=%d is frozen while keyguard locked, return %d",                        mDisplayId, getLastOrientation());                return getLastOrientation();            }        }        final int rootOrientation = mRootDisplayArea.getOrientation();        mLastOrientationSource = mRootDisplayArea.getLastOrientationSource();        return rootOrientation;    }

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