http://blog.csdn.net/abc19842008/article/details/7543559
如何改变Android默认的横竖屏,修改源码一个地方就可以了。
[java]
view plain
copy
- public int rotationForOrientationLw(int orientation, int lastRotation,
- boolean displayEnabled) {
- if (mPortraitRotation < 0) {
- // Initialize the rotation angles for each orientation once.
- Display d = ((WindowManager)mContext.getSystemService(Context.WINDOW_SERVICE))
- .getDefaultDisplay();
- if (d.getWidth() > d.getHeight()) {
- mPortraitRotation = Surface.ROTATION_90;
- mLandscapeRotation = Surface.ROTATION_0;
- mUpsideDownRotation = Surface.ROTATION_270;
- mSeascapeRotation = Surface.ROTATION_180;
- } else {
- mPortraitRotation = Surface.ROTATION_0;
- mLandscapeRotation = Surface.ROTATION_90;
- mUpsideDownRotation = Surface.ROTATION_180;
- mSeascapeRotation = Surface.ROTATION_270;
- }
- }
- {
- Log.i(TAG, “MediaPlayer.is not PlayingVideo”);
- synchronized (mLock) {
- switch (orientation) {
- case ActivityInfo.SCREEN_ORIENTATION_PORTRAIT:
- //always return portrait if orientation set to portrait
- //return mPortraitRotation;
- return mUpsideDownRotation;
- case ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE:
- //always return landscape if orientation set to landscape
- return mLandscapeRotation;
- case ActivityInfo.SCREEN_ORIENTATION_REVERSE_PORTRAIT:
- //always return portrait if orientation set to portrait
- //return mUpsideDownRotation;
- return mPortraitRotation;
- case ActivityInfo.SCREEN_ORIENTATION_REVERSE_LANDSCAPE:
- //always return seascape if orientation set to reverse landscape
- return mSeascapeRotation;
- case ActivityInfo.SCREEN_ORIENTATION_SENSOR_LANDSCAPE:
- //return either landscape rotation based on the sensor
- mOrientationListener.setAllow180Rotation(
- isLandscapeOrSeascape(Surface.ROTATION_180));
- return getCurrentLandscapeRotation(lastRotation);
- case ActivityInfo.SCREEN_ORIENTATION_SENSOR_PORTRAIT:
- mOrientationListener.setAllow180Rotation(
- !isLandscapeOrSeascape(Surface.ROTATION_180));
- return getCurrentPortraitRotation(lastRotation);
- }
- mOrientationListener.setAllow180Rotation(
- orientation == ActivityInfo.SCREEN_ORIENTATION_FULL_SENSOR
- || orientation == ActivityInfo.SCREEN_ORIENTATION_UNSPECIFIED);
- // case for nosensor meaning ignore sensor and consider only lid
- // or orientation sensor disabled
- //or case.unspecified
- if (mLidOpen) {
- return mLidOpenRotation;
- } else if (mDockMode == Intent.EXTRA_DOCK_STATE_CAR && mCarDockRotation >= 0) {
- return mCarDockRotation;
- } else if (mDockMode == Intent.EXTRA_DOCK_STATE_DESK && mDeskDockRotation >= 0) {
- return mDeskDockRotation;
- } else {
- if (useSensorForOrientationLp(orientation)) {
- return mOrientationListener.getCurrentRotation(lastRotation);
- }
- return Surface.ROTATION_0;
- }
- }
- }
- }
修改上面倒数一行代码把return Surface.ROTATION_0改为你要的方向,记得这个要和上面的匹配,宽高不同,Surface.ROTATION_0也不同。因为代码开头就有
[java]
view plain
copy
- if (mPortraitRotation < 0) {
- // Initialize the rotation angles for each orientation once.
- Display d = ((WindowManager)mContext.getSystemService(Context.WINDOW_SERVICE))
- .getDefaultDisplay();
- if (d.getWidth() > d.getHeight()) {
- mPortraitRotation = Surface.ROTATION_90;
- mLandscapeRotation = Surface.ROTATION_0;
- mUpsideDownRotation = Surface.ROTATION_270;
- mSeascapeRotation = Surface.ROTATION_180;
- } else {
- mPortraitRotation = Surface.ROTATION_0;
- mLandscapeRotation = Surface.ROTATION_90;
- mUpsideDownRotation = Surface.ROTATION_180;
- mSeascapeRotation = Surface.ROTATION_270;
- }
- }
调试android记录 —— 屏幕改为竖屏
http://hi.baidu.com/jsxhxcq/item/960ca20607ed24e1359902d2
在调试android时,项目需要将屏幕竖屏,而且没有传感器。
按照网上的要求 在 build/target/product/core.mk 中
PRODUCT_POLICY := android.policy_phone //mid 改为phone
但是改完没有任何反应。随就追踪下去
1. 系统启动后 执行 performEnableScreen()
performEnableScreen() –> mPolicy.enableScreenAfterBoot();->
windowmanagerservice.java
public void enableScreenAfterBoot() {
synchronized(mWindowMap) {
if (mSystemBooted) {
return;
}
mSystemBooted = true;
}
2. 在其函数中调用updateRotation();
public void enableScreenAfterBoot() {
readLidState();
updateRotation(Surface.FLAGS_ORIENTATION_ANIMATION_DISABLE);
}
void updateRotation(int animFlags) {
mPowerManager.setKeyboardVisibility(mLidOpen);
int rotation = Surface.ROTATION_0;
if (mLidOpen) {
rotation = mLidOpenRotation;
} else if (mDockState == Intent.EXTRA_DOCK_STATE_CAR && mCarDockRotation >= 0) {
rotation = mCarDockRotation;
} else if (mDockState == Intent.EXTRA_DOCK_STATE_DESK && mDeskDockRotation >= 0) {
rotation = mDeskDockRotation;
}
//if lid is closed orientation will be portrait
try {
//set orientation on WindowManager
mWindowManager.setRotation(rotation, true,
mFancyRotationAnimation | animFlags);
} catch (RemoteException e) {
// Ignore
}
}
3. setRotation()函数在 windowmanagerservices.java 中
static final boolean DEBUG_ORIENTATION = true; //打开调试信息
设置旋转函数, 下面调用关系
setRotation() – > setRotationUnchecked() – > setRotationUncheckedLocked()-> rotationForOrientationLw()
if (useSensorForOrientationLp(orientation)) {
// If the user has enabled auto rotation by default, do it.
int curRotation = mOrientationListener.getCurrentRotation();
return curRotation >= 0 ? curRotation : lastRotation;
}
http://blog.csdn.net/knock/article/details/7629585
[java]
view plain
copy
- frameworks/base/policy/src/com/android/internal/policy/impl/PhoneWindowManager.java
- public int rotationForOrientationLw(int orientation, int lastRotation,
- boolean displayEnabled) {
- // Initialize the rotation angles for each orientation once.
- Display d = ((WindowManager)mContext.getSystemService(Context.WINDOW_SERVICE))
- .getDefaultDisplay();
- if (d.getWidth() > d.getHeight()) {
- mPortraitRotation = Surface.ROTATION_0; //jeff. ROTATION_90;
- mLandscapeRotation = Surface.ROTATION_0;
- mUpsideDownRotation = Surface.ROTATION_90; //jeff. 270;
- mSeascapeRotation = Surface.ROTATION_180;
- }
http://blog.csdn.net/xulinguestc/article/details/6435957
在framework中修改,可以随意修改屏幕0°指向的方向,其实也是framework层做的映射。 修改HAL层来修改屏幕0°指向的方向应该也是可以的,还没有试过, 估计会复杂点,应该要修改触摸屏的坐标, 触摸键值映射表, 比较麻烦,其实没什么必要,修改framework层就可以搞定了。
平板电脑一般是默认横屏, 竖屏的APP程序, 会自动旋转90°, 由于是顺时针转90°, 需要改为逆时针转90°; 也就是要把portrait改逆时针转90°,这样就和手机一致,兼容很多gsensor游戏, 修改点如下:
[java]
view plain
copy
- PhoneWindowManager.java(//192.168.1.4/opt/android_froyo_smdk/frameworks/policies/base/phone/com/android/internal/policy/impl)
- public int rotationForOrientationLw(int orientation, int lastRotation,
- boolean displayEnabled) {
- if (mPortraitRotation < 0) {
- // Initialize the rotation angles for each orientation once.
- Display d =((WindowManager)mContext.getSystemService(Context.WINDOW_SERVICE))
- .getDefaultDisplay();
- if (d.getWidth() > d.getHeight()) {
- mPortraitRotation = Surface.ROTATION_270;//Surface.ROTATION_90;
- mLandscapeRotation =Surface.ROTATION_0;
- } else {
- mPortraitRotation =Surface.ROTATION_0;
- mLandscapeRotation = Surface.ROTATION_270;//Surface.ROTATION_90;
- }
- }
以下是参考文章——————————————————————————————————
本行实现以后才发现,google在1.5到2.2这个过程中改进了很多,1.5修改竖屏比较麻烦,而2.2是相当的容易!
其实基本上google将之前版本的默认为竖屏的做法进行了改进,不需要再花费更多力气在屏幕的默认横竖切换上面。1.还是kernel竖屏,可以显示到屏幕出现”A N D R O I D”字样
启动参数里加入fbcon=rotate:1 (0:正常屏; 1:顺时钟转90度; 2:转180度; 3:顺时钟转270度;)
最后生成的autoconf.h里有类似项:
#define CONFIG_CMDLINE “console=ttySAC0,115200 fbcon=rotate:1″此项的解析在$(kernel)/drivers/video/console/fbcon.c
static int __init fb_console_setup(char *this_opt);
只是去初始化变量initial_rotation,然后initial_rotation会传递给其他需要的结构。
要选上:Device Drivers -> Graphics support -> Console display driver support ->Framebuffer Console support -> Framebuffer Console Rotation
注意:参考$(kernel)/documentation/fb/fbcon.txt2.android OS旋转屏幕
froyo中已经相当容易,仅修改一处:
frameworks/base/libs/surfaceflinger/SurfaceFlinger.cpp
void GraphicPlane::setDisplayHardware(DisplayHardware *hw)
{
mHw = hw; // initialize the display orientation transform.
// it’s a constant that should come from the display driver.
// int displayOrientation = ISurfaceComposer::eOrientationDefault;
int displayOrientation = ISurfaceComposer::eOrientation90; //jeff.
。。。
}
或者只在init.rc中增加一项:
setprop ro.sf.hwrotation 90就这么简单的一修改,就可以全程竖屏显示了!