问题描述:
当系统SW < 600时, 会出现, 状态栏的导航键(NavigationBar)在横屏的时候会显示在界面右边
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见源码.
@Override public void beginLayoutLw(boolean isDefaultDisplay, int displayWidth, int displayHeight, int displayRotation) { mUnrestrictedScreenLeft = mUnrestrictedScreenTop = 0; mUnrestrictedScreenWidth = displayWidth; mUnrestrictedScreenHeight = displayHeight; mRestrictedScreenLeft = mRestrictedScreenTop = 0; mRestrictedScreenWidth = displayWidth; mRestrictedScreenHeight = displayHeight; mDockLeft = mContentLeft = mStableLeft = mStableFullscreenLeft = mSystemLeft = mCurLeft = 0; mDockTop = mContentTop = mStableTop = mStableFullscreenTop = mSystemTop = mCurTop = 0; mDockRight = mContentRight = mStableRight = mStableFullscreenRight = mSystemRight = mCurRight = displayWidth; mDockBottom = mContentBottom = mStableBottom = mStableFullscreenBottom = mSystemBottom = mCurBottom = displayHeight; mDockLayer = 0x10000000; mStatusBarLayer = -1; // start with the current dock rect, which will be (0,0,displayWidth,displayHeight) final Rect pf = mTmpParentFrame; final Rect df = mTmpDisplayFrame; final Rect vf = mTmpVisibleFrame; pf.left = df.left = vf.left = mDockLeft; pf.top = df.top = vf.top = mDockTop; pf.right = df.right = vf.right = mDockRight; pf.bottom = df.bottom = vf.bottom = mDockBottom; if (isDefaultDisplay) { // For purposes of putting out fake window up to steal focus, we will // drive nav being hidden only by whether it is requested. boolean navVisible = (mLastSystemUiFlags&View.SYSTEM_UI_FLAG_HIDE_NAVIGATION) == 0; // When the navigation bar isn't visible, we put up a fake // input window to catch all touch events. This way we can // detect when the user presses anywhere to bring back the nav // bar and ensure the application doesn't see the event. if (navVisible) { if (mHideNavFakeWindow != null) { mHideNavFakeWindow.dismiss(); mHideNavFakeWindow = null; } } else if (mHideNavFakeWindow == null) { mHideNavFakeWindow = mWindowManagerFuncs.addFakeWindow( mHandler.getLooper(), mHideNavInputEventReceiverFactory, "hidden nav", WindowManager.LayoutParams.TYPE_HIDDEN_NAV_CONSUMER, 0, false, false, true); } // For purposes of positioning and showing the nav bar, if we have // decided that it can't be hidden (because of the screen aspect ratio), // then take that into account. navVisible |= !mCanHideNavigationBar; if (mFocusedWindow != null) { final int fl = mFocusedWindow.getAttrs().flags; if ((fl & View.SYSTEM_UI_FLAG_SHOW_FULLSCREEN) != 0) { navVisible = false; } } if (mNavigationBar != null && ((mLastSystemUiFlags & View.SYSTEM_UI_FLAG_SHOW_FULLSCREEN) == 0)) { // Force the navigation bar to its appropriate place and // size. We need to do this directly, instead of relying on // it to bubble up from the nav bar, because this needs to // change atomically with screen rotations. mNavigationBarOnBottom = (!mNavigationBarCanMove || displayWidth < displayHeight);//关键位置 if (mNavigationBarOnBottom) { // It's a system nav bar or a portrait screen; nav bar goes on bottom. int top = displayHeight - mNavigationBarHeightForRotation[displayRotation]; mTmpNavigationFrame.set(0, top, displayWidth, displayHeight); mStableBottom = mStableFullscreenBottom = mTmpNavigationFrame.top; if (navVisible) { mNavigationBar.showLw(true); mDockBottom = mTmpNavigationFrame.top; mRestrictedScreenHeight = mDockBottom - mDockTop; } else { // We currently want to hide the navigation UI. mNavigationBar.hideLw(true); } if (navVisible && !mNavigationBar.isAnimatingLw()) { // If the nav bar is currently requested to be visible, // and not in the process of animating on or off, then // we can tell the app that it is covered by it. mSystemBottom = mTmpNavigationFrame.top; } } else { // Landscape screen; nav bar goes to the right. int left = displayWidth - mNavigationBarWidthForRotation[displayRotation]; mTmpNavigationFrame.set(left, 0, displayWidth, displayHeight); mStableRight = mStableFullscreenRight = mTmpNavigationFrame.left; if (navVisible) { mNavigationBar.showLw(true); mDockRight = mTmpNavigationFrame.left; mRestrictedScreenWidth = mDockRight - mDockLeft; } else { // We currently want to hide the navigation UI. mNavigationBar.hideLw(true); } if (navVisible && !mNavigationBar.isAnimatingLw()) { // If the nav bar is currently requested to be visible, // and not in the process of animating on or off, then // we can tell the app that it is covered by it. mSystemRight = mTmpNavigationFrame.left; } } // Make sure the content and current rectangles are updated to // account for the restrictions from the navigation bar. mContentTop = mCurTop = mDockTop; mContentBottom = mCurBottom = mDockBottom; mContentLeft = mCurLeft = mDockLeft; mContentRight = mCurRight = mDockRight; mStatusBarLayer = mNavigationBar.getSurfaceLayer(); // And compute the final frame. mNavigationBar.computeFrameLw(mTmpNavigationFrame, mTmpNavigationFrame, mTmpNavigationFrame, mTmpNavigationFrame); if (DEBUG_LAYOUT || true) Log.i(TAG, "mNavigationBar frame: " + mTmpNavigationFrame); } if (DEBUG_LAYOUT) Log.i(TAG, String.format("mDock rect: (%d,%d - %d,%d)", mDockLeft, mDockTop, mDockRight, mDockBottom)); // decide where the status bar goes ahead of time if (mStatusBar != null) { // apply any navigation bar insets pf.left = df.left = mUnrestrictedScreenLeft; pf.top = df.top = mUnrestrictedScreenTop; pf.right = df.right = mUnrestrictedScreenWidth - mUnrestrictedScreenLeft; pf.bottom = df.bottom = mUnrestrictedScreenHeight - mUnrestrictedScreenTop; vf.left = mStableLeft; vf.top = mStableTop; vf.right = mStableRight; vf.bottom = mStableBottom; mStatusBarLayer = mStatusBar.getSurfaceLayer(); // Let the status bar determine its size. mStatusBar.computeFrameLw(pf, df, vf, vf); // For layout, the status bar is always at the top with our fixed height. mStableTop = mUnrestrictedScreenTop + mStatusBarHeight; // If the status bar is hidden, we don't want to cause // windows behind it to scroll. if (mStatusBar.isVisibleLw()) { // Status bar may go away, so the screen area it occupies // is available to apps but just covering them when the // status bar is visible. mDockTop = mUnrestrictedScreenTop + mStatusBarHeight; mContentTop = mCurTop = mDockTop; mContentBottom = mCurBottom = mDockBottom; mContentLeft = mCurLeft = mDockLeft; mContentRight = mCurRight = mDockRight; if (DEBUG_LAYOUT) Log.v(TAG, "Status bar: " + String.format( "dock=[%d,%d][%d,%d] content=[%d,%d][%d,%d] cur=[%d,%d][%d,%d]", mDockLeft, mDockTop, mDockRight, mDockBottom, mContentLeft, mContentTop, mContentRight, mContentBottom, mCurLeft, mCurTop, mCurRight, mCurBottom)); } if (mStatusBar.isVisibleLw() && !mStatusBar.isAnimatingLw()) { // If the status bar is currently requested to be visible, // and not in the process of animating on or off, then // we can tell the app that it is covered by it. mSystemTop = mUnrestrictedScreenTop + mStatusBarHeight; } } } }?
修改:
修改默认值.
public void setInitialDisplaySize(Display display, int width, int height, int density) { mDisplay = display; int shortSize, longSize; if (width > height) { shortSize = height; longSize = width; mLandscapeRotation = Surface.ROTATION_0; mSeascapeRotation = Surface.ROTATION_180; if (mContext.getResources().getBoolean( com.android.internal.R.bool.config_reverseDefaultRotation)) { mPortraitRotation = Surface.ROTATION_90; mUpsideDownRotation = Surface.ROTATION_270; } else { mPortraitRotation = Surface.ROTATION_270; mUpsideDownRotation = Surface.ROTATION_90; } } else { shortSize = width; longSize = height; mPortraitRotation = Surface.ROTATION_0; mUpsideDownRotation = Surface.ROTATION_180; if (mContext.getResources().getBoolean( com.android.internal.R.bool.config_reverseDefaultRotation)) { mLandscapeRotation = Surface.ROTATION_270; mSeascapeRotation = Surface.ROTATION_90; } else { mLandscapeRotation = Surface.ROTATION_90; mSeascapeRotation = Surface.ROTATION_270; } } mStatusBarHeight = mContext.getResources().getDimensionPixelSize( com.android.internal.R.dimen.status_bar_height); // Height of the navigation bar when presented horizontally at bottom mNavigationBarHeightForRotation[mPortraitRotation] = mNavigationBarHeightForRotation[mUpsideDownRotation] = mContext.getResources().getDimensionPixelSize( com.android.internal.R.dimen.navigation_bar_height); mNavigationBarHeightForRotation[mLandscapeRotation] = mNavigationBarHeightForRotation[mSeascapeRotation] = mContext.getResources().getDimensionPixelSize( com.android.internal.R.dimen.navigation_bar_height_landscape); // Width of the navigation bar when presented vertically along one side mNavigationBarWidthForRotation[mPortraitRotation] = mNavigationBarWidthForRotation[mUpsideDownRotation] = mNavigationBarWidthForRotation[mLandscapeRotation] = mNavigationBarWidthForRotation[mSeascapeRotation] = mContext.getResources().getDimensionPixelSize( com.android.internal.R.dimen.navigation_bar_width); // SystemUI (status bar) layout policy int shortSizeDp = shortSize * DisplayMetrics.DENSITY_DEFAULT / density; if (shortSizeDp < 600) { // 0-599dp: "phone" UI with a separate status & navigation bar mHasSystemNavBar = false; mNavigationBarCanMove = false;//原来的值为true } else if (shortSizeDp < 720) { // 600+dp: "phone" UI with modifications for larger screens mHasSystemNavBar = false; mNavigationBarCanMove = false; }?
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