有这样的一个需求，客户需要的屏幕是竖屏的格式。而手头上的屏是硬件的横屏。
修改的话，只能从软件上入手。
文件位置：frameworks/base/core/java/android/content/pm/PackageParser.java
修改前：
//SCREEN_ORIENTATION_UNSPECIFIED 默认值，系统根据方向感应自动选择屏幕方向
//SCREEN_ORIENTATION_PORTRAIT 正向竖屏，显示的高比宽长（锁死为竖屏方向，不再让方向感应起作用）
//SCREEN_ORIENTATION_REVERSE_PORTRAIT 反转
if (a.info.resizeable) {
// Fixed screen orientation isn't supported with resizeable activities.
a.info.screenOrientation = ActivityInfo.SCREEN_ORIENTATION_UNSPECIFIED;
} else {
a.info.screenOrientation = sa.getInt(
R.styleable.AndroidManifestActivity_screenOrientation,
ActivityInfo.SCREEN_ORIENTATION_UNSPECIFIED);
}
修改后：//做法是先竖屏，再反转。就能得到正常的竖屏显示
// if (a.info.resizeable) {
// //Fixed screen orientation isn't supported with resizeable activities.
// a.info.screenOrientation = ActivityInfo.SCREEN_ORIENTATION_UNSPECIFIED;
// } else {
// a.info.screenOrientation = sa.getInt(
// R.styleable.AndroidManifestActivity_screenOrientation,
// ActivityInfo.SCREEN_ORIENTATION_UNSPECIFIED);
// }
a.info.screenOrientation = sa.getInt(
R.styleable.AndroidManifestActivity_screenOrientation,
ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);
a.info.screenOrientation = ActivityInfo.SCREEN_ORIENTATION_PORTRAIT;
a.info.screenOrientation = ActivityInfo.SCREEN_ORIENTATION_REVERSE_PORTRAIT;