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Android 通过按键旋转屏幕
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很好的帖子:

自己做的立方体旋转效果
http://www.eoeandroid.com/thread-185331-1-1.html

Android多线程后台下源码
http://www.eoeandroid.com/thread-185328-1-1.html

android仿酷狗播放器
http://www.eoeandroid.com/thread-185894-1-1.html

 

-------------------帖子正文-----------------------

有个功能,通过长按menu按键,可以旋转屏幕方向(0°或者90°),这个功能有时蛮有用的,下面来看看是如何实现的:

1 修改按键处理程序

frameworks/policies/base/phone/com/android/internal/policy/impl/PhoneWindowManager.java

函数

public boolean interceptKeyTi(WindowState win, int code, int metaKeys, boolean down, int repeatCount, int flags) // 在处理菜单键的地方 if (code == KeyEvent.KEYCODE_MENU) { final int chordBug = KeyEvent.META_SHIFT_ON; if (down && repeatCount == 0 ) { if (mEnableShiftMenuBugReports && (metaKeys & chordBug) == chordBug) { Intent intent = new Intent(Intent.ACTION_BUG_REPORT); mContext.sendOrderedBroadcast(intent, null ); return true ; } else if (SHOW_PROCESSES_ON_ALT_MENU &&(metaKeys & KeyEvent.META_ALT_ON) == KeyEvent.META_ALT_ON) { Intent service = new Intent(); service.setClassName(mContext, "com.android.server.LoadAverageService" ); ContentResolver res = mContext.getContentResolver(); boolean shown = Settings.System.getInt(res, Settings.System.SHOW_PROCESSES, 0) != 0 ; if (! shown) { mContext.startService(service); } else { mContext.stopService(service); } Settings.System.putInt(res, Settings.System.SHOW_PROCESSES, shown ? 0 : 1 ); return true ; }} // 上面是原来的内容,下面是添加的新内容 else if (down && repeatCount == 20 && MenuKeyUp && (! keyguardOn)) { // 如果按下Menu键一定时间,抬起时执行此段函数 MenuKeyUp = false ; try { int ro = mWindowManager.getRotation(); // 获取当前方向 if( ro == ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE ) { ro = ActivityInfo.SCREEN_ORIENTATION_PORTRAIT;

} else {

 
ro = ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE;
 

}
 
}catch (RemoteException e) {
 

 
Log.v(TAG, "!!! getRotation fail !!!");
 

}
 

 
try {
 

//旋转屏幕

 
mWindowManager.setRotation(ro, true, Surface.FLAGS_ORIENTATION_ANIMATION_DISABLE);

 
//最后可跟不同的参数,可实现一些旋转效果
 

}
 

 
catch (RemoteException e) {
 

Log.v(TAG, "!!! mWindowManager.setRotation fail !!!");

 
}
 
 

return true;

 
}
 
if(!down)
{
 
MenuKeyUp = true;
 
}
 

}

2 修改实现选择的函数

 

/frameworks/base/services/java/com/android/server/ WindowManagerService.java // 找到该函数 public boolean setRotationUncheckedLocked( int rotation, int animFlags) // 将以下妨碍选择的内容注释掉 // rotation = mPolicy.rotationForOrientationLw(mForcedAppOrientation, // mRotation, mDisplayEnabled);

 

3、当然也可以新作一个rotate键来选择屏幕,以下是引用代码

 

 

} else if (code == KeyEvent.KEYCODE_ROTATE) { // ROTATE KEY ssed if (down) { mButtonPushFlg = true ; try { int ro = mWindowManager.getRotation(); // Orientation vertical if (ro == 3 ) { mWindowManager.setRotation (Surface.ROTATION_0, true ,mFancyRotationAnimation); // Orientation landscape } else { mWindowManager.setRotation(Surface.ROTATION_270, true ,mFancyRotationAnimation); // Orientation portlate } } catch (RemoteException e) { // Igbore Log.i("info", "Rotation failed " ); } } return true ; }

 

 

 

 

 

 


原文链接:http://www.cnblogs.com/vus520/archive/2012/08/16/2641856.html
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