Android11.0(R) MTK6771 平板横屏方案修改(强制app横屏 + 开机logo/动画+关机充电横屏 + RecoveryUI 横屏)

本文主要是介绍Android11.0(R) MTK6771 平板横屏方案修改(强制app横屏 + 开机logo/动画+关机充电横屏 + RecoveryUI 横屏)，希望对大家解决编程问题提供一定的参考价值，需要的开发者们随着小编来一起学习吧！

拆解步骤

1、app 强制横屏显示，无视 android:screenOrientation=“portrait” 属性

2、开机动画横屏

3、开机logo、关机充电动画横屏

4、RecoveryUI 横屏

11 和 10 的差别不大，app 强制横屏显示和开机动画横屏不太一样其它都一样处理

上代码

##1、app 强制横屏显示

DisplayRotation 显示 mRotation 默认改为 3 (270)

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

 // private int mRotation;private int mRotation = 3;//cczheng add for land scapboolean updateRotationUnchecked(boolean forceUpdate) {//cczheng add for app force landscapeif (true) {return true;}//add for app force landscapeScreenRotationAnimation screenRotationAnimation;if (!forceUpdate) {if (mDeferredRotationPauseCount > 0) {// Rotation updates have been paused temporarily.  Defer the update until// updates have been resumed.if (DEBUG_ORIENTATION) Slog.v(TAG_WM, "Deferring rotation, rotation is paused.");return false;}......@Surface.Rotationint getRotation() {// return mRotation;return 3;}

按照这样修改后，app 默认能横屏显示的，但出现了新 bug，目测是 11 新增的属性

当按 home 或者 back 最终回到 Launcher3 时会有一个明显的竖屏转成横屏的效果，这个查了几天也没

找到是哪里的原因，目前先挂着，后面有空了再细细看下!!!

系统导航栏位置调整，横屏后 navigationBarPosition 默认在左边

作为平板项目，需要将位置改为底部,直接修改 navigationBarPosition() 返回 NAV_BAR_BOTTOM

frameworks\base\services\core\java\com\android\server\wm\DisplayPolicy.java

@NavigationBarPositionprivate int navigationBarPosition(int displayWidth, int displayHeight, int displayRotation) {//cchzneg annotaion for land scape/*if (mNavigationBarCanMove && displayWidth > displayHeight) {if (displayRotation == Surface.ROTATION_270) {return NAV_BAR_LEFT;} else {return NAV_BAR_RIGHT;}}*/return NAV_BAR_BOTTOM;}

2、开机动画横屏

设置角度为 ui::ROTATION_270

frameworks\base\cmds\bootanimation\BootAnimation.cpp

status_t BootAnimation::readyToRun() {mAssets.addDefaultAssets();mDisplayToken = SurfaceComposerClient::getInternalDisplayToken();if (mDisplayToken == nullptr)return NAME_NOT_FOUND;DisplayConfig displayConfig;const status_t error =SurfaceComposerClient::getActiveDisplayConfig(mDisplayToken, &displayConfig);if (error != NO_ERROR)return error;mMaxWidth = android::base::GetIntProperty("ro.surface_flinger.max_graphics_width", 0);mMaxHeight = android::base::GetIntProperty("ro.surface_flinger.max_graphics_height", 0);ui::Size resolution = displayConfig.resolution;resolution = limitSurfaceSize(resolution.width, resolution.height);// create the native surfacesp<SurfaceControl> control = session()->createSurface(String8("BootAnimation"),resolution.getHeight(), resolution.getWidth(), PIXEL_FORMAT_RGB_565);//resolution.getWidth(), resolution.getHeight(), PIXEL_FORMAT_RGB_565);SurfaceComposerClient::Transaction t;//cczheng add for land scap  [S]Rect destRect(resolution.getHeight(), resolution.getWidth());//270t.setDisplayProjection(mDisplayToken, ui::ROTATION_270, destRect, destRect);//cczheng add for land scap  [E]// this guest property specifies multi-display IDs to show the boot animation// multiple ids can be set with comma (,) as separator, for example:// setprop persist.boot.animation.displays 19260422155234049,19261083906282754Vector<uint64_t> physicalDisplayIds;.....}

3、开机logo、关机充电动画横屏

开机logo定义屏幕分辨率以对应资源文件夹的位置为

vendor\mediatek\proprietary\bootable\bootloader\lk\project\xxxx.mk 没有则看下面的

device\mediateksample\xxxx\ProjectConfig.mk

mk 中的 BOOT_LOGO = hdplus

对应的资源文件位置在 vendor/mediatek/proprietary/bootable/bootloader/lk/dev/logo/hdplus

可以看到 hdplus 中都是竖屏的图片，而 wxganl 中已经是横屏的图片

则我们将 BOOT_LOGO 修改为 wxganl 即可

接下来还需要继续修改显示的角度，依旧改成 270，不然会出现花屏的现象

开机第一张图片 uboot 对应显示 phical_screen.rotation = 270

vendor\mediatek\proprietary\bootable\bootloader\lk\platform\mt6765\mt_logo.c

void init_fb_screen()
{.....// in JB2.MP need to allign width and height to 32 ,but jb5.mp needn'tphical_screen.needAllign = 1;phical_screen.allignWidth = ALIGN_TO(CFG_DISPLAY_WIDTH, MTK_FB_ALIGNMENT);/* In GB, no need to adjust 180 showing logo ,for fb driver dealing the change *//* but in JB, need adjust it for screen 180 roration           */phical_screen.need180Adjust = 0;   // need sync with chip driverdprintf(INFO, "[lk logo: %s %d]MTK_LCM_PHYSICAL_ROTATION = %s\n",__FUNCTION__,__LINE__, MTK_LCM_PHYSICAL_ROTATION);if (0 == strncmp(MTK_LCM_PHYSICAL_ROTATION, "270", 3)) {phical_screen.rotation = 270;} else if (0 == strncmp(MTK_LCM_PHYSICAL_ROTATION, "90", 2)) {phical_screen.rotation = 90;} else if (0 == strncmp(MTK_LCM_PHYSICAL_ROTATION, "180", 3) && (phical_screen.need180Adjust == 1)) {phical_screen.rotation = 180;} else {phical_screen.rotation = 270;//cczheng add for land scap}....

开机第二张图片 kernel 对应显示 phical_screen.rotation = 270

vendor\mediatek\proprietary\external\libshowlogo\charging_animation.cpp

int anim_fb_init(void)
{.....phical_screen.needAllign = 1;phical_screen.need180Adjust = 1;phical_screen.fb_size = fb_size;if (MTK_LOG_ENABLE == 1) {SLOGD("[libshowlogo: %s %d]MTK_LCM_PHYSICAL_ROTATION = %s\n",__FUNCTION__,__LINE__, MTK_LCM_PHYSICAL_ROTATION);}if(0 == strncmp(MTK_LCM_PHYSICAL_ROTATION, "270", 3)){phical_screen.rotation = 270;} else if(0 == strncmp(MTK_LCM_PHYSICAL_ROTATION, "90", 2)){phical_screen.rotation = 90;} else if(0 == strncmp(MTK_LCM_PHYSICAL_ROTATION, "180", 3) && (phical_screen.need180Adjust == 1)){phical_screen.rotation = 180;} else {phical_screen.rotation = 270;//cczheng add for land scap}if (MTK_LOG_ENABLE == 1) {SLOGD("[libshowlogo]phical_screen: width= %d,height= %d,bits_per_pixel =%d,needAllign = %d,allignWidth=%d rotation =%d ,need180Adjust = %d\n",phical_screen.width, phical_screen.height,phical_screen.bits_per_pixel, phical_screen.needAllign,phical_screen.allignWidth, phical_screen.rotation, phical_screen.need180Adjust);SLOGD("[libshowlogo: %s %d]show old animtion= 1, running show_animationm_ver %d\n",__FUNCTION__,__LINE__, show_animationm_ver);SLOGD("[libshowlogo: %s %d]draw_anim_mode = 1, running mode %d\n",__FUNCTION__,__LINE__, draw_anim_mode);}return 0;
}

关机充电动画错位问题

如果出现充电动画图片错位的现象，多数都是因为图形绘制点和屏幕尺寸不匹配导致的。可通过调整 cust_display.h 中位置参数

/vendor/mediatek/proprietary/external/libshowlogo/cust_display.h

之前都是通过修改 cust_display.h 文件夹中预置宏定义，10.0 中代码结构做了调整，宏定义都没了，初始化写在了 show_animation_common.c 中,修改 rotation = 3 对调 lcm_width 和 lcm_height，当 lcm_width1280 && lcm_height800 时动画就不错位了，这里根据你自己的分辨率情况自行微调，不过一般系统默认的配置值都是对了

vendor/mediatek/proprietary/external/libshowlogo/show_animation_common.c


/** Fill resolution structure based on lcd size**/
void init_charging_animation_ui_dimension() {int lcm_width, lcm_height;struct fb_var_screeninfo vinfo;display_fd = open("/dev/graphics/fb0", O_RDONLY);if (display_fd < 0) {SLOGD("[show_animation_common: %s %d]open mtkfb fail...\n",__FUNCTION__,__LINE__);}if (ioctl(display_fd, FBIOGET_VSCREENINFO, &vinfo) < 0) {close(display_fd);SLOGD("[show_animation_common: %s %d]ioctl FBIOGET_VSCREENINFO failed\n",__FUNCTION__,__LINE__);}close(display_fd);lcm_width = vinfo.xres;lcm_height = vinfo.yres;int rotation = getRotation();rotation = 3;// cczheng add rotation = 3 for charging landscapeif (MTK_LOG_ENABLE == 1) {SLOGD("[libshowlogo: %s %d]rotation = %d\n",__FUNCTION__,__LINE__, rotation);}if ((ORIENTATION_270 == rotation)|| (ORIENTATION_90 == rotation)){lcm_width = vinfo.yres;lcm_height = vinfo.xres;}SLOGD("[show_animation_common: %s %d] lcm_width and lcm_height= %d , %d \n",__FUNCTION__,__LINE__,lcm_width,lcm_height);if((lcm_width == 1080) && (lcm_height == 1920)) { // Special handling for FHDSLOGD("[show_animation_common: %s %d]Inside 1080*1920 \n",__FUNCTION__,__LINE__);

4、RecoveryUI 横屏

RecoveryUI 在9.0 之前安卓源码并没有为我们适配好旋转配置，之前都是通过自己新增 mt_graphic_rotate.cpp 和 mt_graphic_rotate.h 文件来实现旋转。10.0 中代码也进行了较大重构相比之前，只需修改简单配置 rotation 就能旋转为横屏。

rotation = GRRotation::LEFT; 270

rotation = GRRotation::DOWN; 180

rotation = GRRotation::RIGHT; 90

bootable\recovery\minui\graphics.cpp


int gr_init() {.....gr_backend = backend.release();int overscan_percent = android::base::GetIntProperty("ro.minui.overscan_percent", 0);overscan_offset_x = gr_draw->width * overscan_percent / 100;overscan_offset_y = gr_draw->height * overscan_percent / 100;gr_flip();gr_flip();if (!gr_draw) {printf("gr_init: gr_draw becomes nullptr after gr_flip\n");return -1;}std::string rotation_str =android::base::GetProperty("ro.minui.default_rotation", "ROTATION_NONE");if (rotation_str == "ROTATION_RIGHT") {gr_rotate(GRRotation::RIGHT);} else if (rotation_str == "ROTATION_DOWN") {gr_rotate(GRRotation::DOWN);} else if (rotation_str == "ROTATION_LEFT") {gr_rotate(GRRotation::LEFT);} else {  // "ROTATION_NONE" or unknown stringgr_rotate(GRRotation::NONE);}rotation = GRRotation::LEFT;//cczheng add rotation = 3 for recoveryUI landscape