android修改framework固定屏幕

文件位置：

.\frameworks\base\services\java\com\android\server\wm

文件：

WindowManagerService.java

找到updateRotationUncheckedLocked方法，按以下      "//add by ytmfdw"    處進行修改

代碼：

 

public boolean updateRotationUncheckedLocked(boolean inTransaction) {
        if (mDeferredRotationPauseCount > 0) {
            // Rotation updates have been paused temporarily.  Defer the update until
            // updates have been resumed.
            if (DEBUG_ORIENTATION) Slog.v(TAG, "Deferring rotation, rotation is paused." );
            return false ;
        }

        ScreenRotationAnimation screenRotationAnimation =
                mAnimator.getScreenRotationAnimationLocked(Display.DEFAULT_DISPLAY);
        if (screenRotationAnimation != null && screenRotationAnimation.isAnimating()) {
            // Rotation updates cannot be performed while the previous rotation change
            // animation is still in progress.  Skip this update.  We will try updating
            // again after the animation is finished and the display is unfrozen.
            if (DEBUG_ORIENTATION) Slog.v(TAG, "Deferring rotation, animation in progress." );
            return false ;
        }

        if (!mDisplayEnabled) {
            // No point choosing a rotation if the display is not enabled.
            if (DEBUG_ORIENTATION) Slog.v(TAG, "Deferring rotation, display is not enabled." );
            return false ;
        }

        // TODO: Implement forced rotation changes.
        //       Set mAltOrientation to indicate that the application is receiving
        //       an orientation that has different metrics than it expected.
        //       eg. Portrait instead of Landscape.

        int rotation = mPolicy.rotationForOrientationLw(mForcedAppOrientation, mRotation);
        boolean altOrientation = !mPolicy.rotationHasCompatibleMetricsLw(
                mForcedAppOrientation, rotation);

        if (DEBUG_ORIENTATION) {
            Slog.v(TAG, "Application requested orientation "
                    + mForcedAppOrientation + ", got rotation " + rotation
                    + " which has " + (altOrientation ? "incompatible" : "compatible" )
                    + " metrics");
        }
        // add by ytmfdw　　　
       rotation=0;　　　　//修改這裏，０：豎屏，３：橫屏　
       
        if (mRotation == rotation && mAltOrientation == altOrientation) {
            // No change.
            return false ;
        }

        if (DEBUG_ORIENTATION) {
            Slog.v(TAG,
                "Rotation changed to " + rotation + (altOrientation ? " (alt)" : "" )
                + " from " + mRotation + (mAltOrientation ? " (alt)" : "" )
                + ", forceApp=" + mForcedAppOrientation);
        }

        mRotation = rotation;
        mAltOrientation = altOrientation;
        mPolicy.setRotationLw(mRotation);

        mWindowsFreezingScreen = true;
        mH.removeMessages(H.WINDOW_FREEZE_TIMEOUT);
        mH.sendMessageDelayed(mH.obtainMessage(H.WINDOW_FREEZE_TIMEOUT),
                WINDOW_FREEZE_TIMEOUT_DURATION);
        mWaitingForConfig = true;
        getDefaultDisplayContentLocked().layoutNeeded = true;
        startFreezingDisplayLocked(inTransaction, 0, 0);
        // startFreezingDisplayLocked can reset the ScreenRotationAnimation.
        screenRotationAnimation =
                mAnimator.getScreenRotationAnimationLocked(Display.DEFAULT_DISPLAY);

        // We need to update our screen size information to match the new
        // rotation.  Note that this is redundant with the later call to
        // sendNewConfiguration() that must be called after this function
        // returns...  however we need to do the screen size part of that
        // before then so we have the correct size to use when initializing
        // the rotation animation for the new rotation.
        computeScreenConfigurationLocked( null);

        final DisplayContent displayContent = getDefaultDisplayContentLocked();
        final DisplayInfo displayInfo = displayContent.getDisplayInfo();
        if (!inTransaction) {
            if (SHOW_TRANSACTIONS) {
                Slog.i(TAG, ">>> OPEN TRANSACTION setRotationUnchecked");
            }
            Surface.openTransaction();
        }
        try {
            // NOTE: We disable the rotation in the emulator because
            //       it doesn't support hardware OpenGL emulation yet.
            if (CUSTOM_SCREEN_ROTATION && screenRotationAnimation != null
                    && screenRotationAnimation.hasScreenshot()) {
                if (screenRotationAnimation.setRotationInTransaction(
                        rotation, mFxSession,
                        MAX_ANIMATION_DURATION, mTransitionAnimationScale,
                        displayInfo.logicalWidth, displayInfo.logicalHeight)) {
                    updateLayoutToAnimationLocked();
                }
            }

            mDisplayManagerService.performTraversalInTransactionFromWindowManager();
        } finally {
            if (!inTransaction) {
                Surface.closeTransaction();
                if (SHOW_LIGHT_TRANSACTIONS) {
                    Slog.i(TAG, "<<< CLOSE TRANSACTION setRotationUnchecked");
                }
            }
        }

        final WindowList windows = displayContent.getWindowList();
        for (int i = windows.size() - 1; i >= 0; i--) {
            WindowState w = windows.get(i);
            if (w.mHasSurface) {
                if (DEBUG_ORIENTATION) Slog.v(TAG, "Set mOrientationChanging of " + w);
                w.mOrientationChanging = true;
                mInnerFields.mOrientationChangeComplete = false;
            }
        }

        for (int i=mRotationWatchers.size()-1; i>=0; i--) {
            try {
                mRotationWatchers.get(i).onRotationChanged(rotation);
            } catch (RemoteException e) {
            }
        }

        scheduleNotifyRotationChangedIfNeededLocked(displayContent, rotation);

        return true ;
    }