Android P系统修改状态栏记录

水深无声 2021-11-05 18:04 435阅读 0赞

1、强制永久显示状态栏（不被app隐藏）  
代码路径：\\frameworks\\base\\services\\core\\java\\com\\android\\server\\policy\\PhoneWindowManager.java

/** {@inheritDoc} */
    @Override
    public void applyPostLayoutPolicyLw(WindowState win, WindowManager.LayoutParams attrs,WindowState attached, WindowState imeTarget) { 
            final boolean affectsSystemUi = win.canAffectSystemUiFlags();
            if (DEBUG_LAYOUT) Slog.i(TAG, "Win " + win + ": affectsSystemUi=" + affectsSystemUi);
            applyKeyguardPolicyLw(win, imeTarget);
    		//modify start 220190808
            //final int fl = PolicyControl.getWindowFlags(win, attrs);
    		int fl = PolicyControl.getWindowFlags(win, attrs);
    		fl |= FLAG_FORCE_NOT_FULLSCREEN;				//增加FLAG_FORCE_NOT_FULLSCREEN编辑，强制不全屏
    		//modify end 220190808
    
    		 //省略一部分代码
             //...
            if (mTopFullscreenOpaqueWindowState == null && affectsSystemUi) { 
              if ((fl & FLAG_FORCE_NOT_FULLSCREEN) != 0) { 
                  mForceStatusBar = true;									//mForceStatusBar = true,强制显示状态栏
              }
              if (attrs.type == TYPE_DREAM) { 
                  // If the lockscreen was showing when the dream started then wait
                  // for the dream to draw before hiding the lockscreen.
                  if (!mDreamingLockscreen
                          || (win.isVisibleLw() && win.hasDrawnLw())) { 
                      mShowingDream = true;
                      appWindow = true;
                  }
              }
    
              // For app windows that are not attached, we decide if all windows in the app they
              // represent should be hidden or if we should hide the lockscreen. For attached app
              // windows we defer the decision to the window it is attached to.
              if (appWindow && attached == null) { 
                  if (attrs.isFullscreen() && inFullScreenOrSplitScreenSecondaryWindowingMode) { 
                      if (DEBUG_LAYOUT) Slog.v(TAG, "Fullscreen window: " + win);
                      mTopFullscreenOpaqueWindowState = win;
                      if (mTopFullscreenOpaqueOrDimmingWindowState == null) { 
                          mTopFullscreenOpaqueOrDimmingWindowState = win;
                      }
                      if ((fl & FLAG_ALLOW_LOCK_WHILE_SCREEN_ON) != 0) { 
                          mAllowLockscreenWhenOn = true;
                      }
                  }
              }
          }
             //省略一部分代码
             //...
    }

2、固定状态栏无背景View，背景色无变化  
代码路径：\\frameworks\\base\\core\\java\\com\\android\\internal\\policy\\DecorView.java

private void updateColorViewInt(final ColorViewState state, int sysUiVis, int color,
                int dividerColor, int size, boolean verticalBar, boolean seascape, int sideMargin,
                boolean animate, boolean force) { 
             //省略一部分代码
             //...
    		//add by sunxiaolin
    		//增加view= null,showView=true逻辑，使其进入以下代码分支
    		view = null;
    		showView = true;
            if (view == null) { 
                if (showView) { 
                    state.view = view = new View(mContext);
                    setColor(view, color, dividerColor, verticalBar, seascape);
                    view.setTransitionName(state.attributes.transitionName);
                    view.setId(state.attributes.id);
                    visibilityChanged = true;
                    view.setVisibility(INVISIBLE);
                    state.targetVisibility = VISIBLE;
    			//modify by sunxiaolin
    			//做测试，增加的状态栏View的颜色为红色，方便测试查看，状态栏底层View为空色
    			color = Color.RED;
    			visibilityChanged = false;
    			setColor(view, color, dividerColor, verticalBar, seascape);
    			view.setVisibility(VISIBLE);
    			Log.d(TAG, "sunxiaolin,updateColorViewInt mWindow.getAttributes().flags(0x" + Integer.toHexString(mWindow.getAttributes().flags) + ")");
    			Log.d(TAG, "sunxiaolin,updateColorViewInt state.present=" + state.present);
                    LayoutParams lp = new LayoutParams(resolvedWidth, resolvedHeight,
                            resolvedGravity);
                    if (seascape) { 
                        lp.leftMargin = sideMargin;
                    } else { 
                        lp.rightMargin = sideMargin;
                    }
    				Log.d(TAG, "sunxiaolin,updateColorViewInt do nothing");
    				Log.d(TAG, "sunxiaolin,updateColorViewInt do nothing");
    				//去掉添加View，即没有状态栏View背景。这样状态栏背景固定为无背景
                    //addView(view, lp);
                    //updateColorViewTranslations();
                }
            }
             //省略一部分代码
             //...
    }