實(shí)現(xiàn)按鍵旋轉(zhuǎn)屏幕(簡單實(shí)現(xiàn)版).doc

實(shí)現(xiàn)按鍵旋轉(zhuǎn)屏幕 分類： android 2011-02-23 17:56 220人閱讀 評論(0) 收藏 舉報 通過長按menu按鍵，可以旋轉(zhuǎn)屏幕方向（0或者90），這個功能有時蠻有用的，下面來看看是如何實(shí)現(xiàn)的： 1 修改按鍵處理程序frameworks/policies/base/phone/com/android/internal/policy/impl/PhoneWindowManager.java函數(shù)public boolean interceptKeyTi(WindowState win, int code, int metaKeys, boolean down, int repeatCount, int flags)在處理菜單鍵的地方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;/上面是原來的內(nèi)容，下面是添加的新內(nèi)容else if (down & repeatCount = 20 & MenuKeyUp & (!keyguardOn) /如果按下Menu鍵一定時間，抬起時執(zhí)行此段函數(shù)MenuKeyUp = false;try int ro = mWindowManager.getRotation(); /獲取當(dāng)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 /旋轉(zhuǎn)屏幕mWindowManager.setRotation(ro, true, Surface.FLAGS_ORIENTATION_ANIMATION_DISABLE);/最后可跟不同的參數(shù)，可實(shí)現(xiàn)一些旋轉(zhuǎn)效果 catch (RemoteException e) Log.v(TAG, ! mWindowManager.setRotation fail !);return true;if(!down) MenuKeyUp = true; 2 修改實(shí)現(xiàn)選擇的函數(shù)/frameworks/base/services/java/com/android/server/WindowManagerService.java找到該函數(shù)public boolean setRotationUncheckedLocked(int rotation, int animFlags)將以下妨礙選擇的內(nèi)容注釋掉/rotation = mPolicy.rotationForOrientationLw(mForcedAppOrientation,/ mRotation, mDisplayEnabled);3、當(dāng)然也可以新作一個rotate鍵來選擇屏幕，以下是引用代碼+ 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