进入其他程序，再回来，导致桌面丢失

zangcf

调试发现：
E/SurfaceFlinger(  211): zcfdebug1 the mActiveBuffer is com.android.launcher3/com.android.launcher3.Launcher
E/SurfaceFlinger(  211): zcfdebug1 the mActiveBuffer->stride is 1088
E/SurfaceFlinger(  211): zcfdebug1 the mActiveBuffer->height is 1920

这个高度被修改了
E/SurfaceFlinger(  209): zcfdebug1 the mActiveBuffer is com.android.launcher3/com.android.launcher3.Launcher
E/SurfaceFlinger(  209): zcfdebug1 the mActiveBuffer->stride is 1088
E/SurfaceFlinger(  209): zcfdebug1 the mActiveBuffer->height is 960

会是那个地方修改的呢？