Android 通过按键旋转屏幕

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 pressed   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; }

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