Android9.0 修改状态栏图标之间的间距

操作

com.android.systemui.statusbar.phone/StatusBarIconController.java类中修改如下方法：

@VisibleForTesting        protected StatusBarIconView addIcon(int index, String slot, boolean blocked,                StatusBarIcon icon) {            StatusBarIconView view = onCreateStatusBarIconView(slot, blocked);            view.set(icon);            //add:状态栏图标添加间距.            view.setPadding(2,0,2,0);            //end add.            mGroup.addView(view, index, onCreateLayoutParams());            return view;        }        @VisibleForTesting        protected StatusBarWifiView addSignalIcon(int index, String slot, WifiIconState state) {            StatusBarWifiView view = onCreateStatusBarWifiView(slot);            view.applyWifiState(state);            //add:状态栏图标添加间距.            view.setPadding(2,0,2,0);            //end add.            mGroup.addView(view, index, onCreateLayoutParams());            if (mIsInDemoMode) {                mDemoStatusIcons.addDemoWifiView(state);            }            return view;        }        @VisibleForTesting        protected StatusBarMobileView addMobileIcon(int index, String slot, MobileIconState state) {            StatusBarMobileView view = onCreateStatusBarMobileView(slot);            view.applyMobileState(state);            //add:状态栏图标添加间距.            view.setPadding(2,0,2,0);            //end add.            mGroup.addView(view, index, onCreateLayoutParams());            if (mIsInDemoMode) {                mDemoStatusIcons.addMobileView(state);            }            return view;        }

原理

状态栏添加图标最终会调用到
com.android.systemui.statusbar.phone/StatusBarIconController.java类中的addHolder()方法：

protected StatusIconDisplayable addHolder(int index, String slot, boolean blocked,                StatusBarIconHolder holder) {            switch (holder.getType()) {                case TYPE_ICON:                    return addIcon(index, slot, blocked, holder.getIcon());                case TYPE_WIFI:                    return addSignalIcon(index, slot, holder.getWifiState());                case TYPE_MOBILE:                    return addMobileIcon(index, slot, holder.getMobileState());            }            return null;        }

就是在这里将图标添加到@+id/statusIcons中的
布局文件status_bar.xml

...                    ...

system_icon.xml:

然后进入addIcon方法：

@VisibleForTesting        protected StatusBarIconView addIcon(int index, String slot, boolean blocked,                StatusBarIcon icon) {            StatusBarIconView view = onCreateStatusBarIconView(slot, blocked);            view.set(icon);            mGroup.addView(view, index, onCreateLayoutParams());            return view;        }

addView的时候创建了onCreateLayoutParams()

public static class DarkIconManager extends IconManager {       ...        private int mIconHPadding;        public DarkIconManager(LinearLayout linearLayout) {            super(linearLayout);            mIconHPadding = mContext.getResources().getDimensionPixelSize(                    R.dimen.status_bar_icon_padding);           ...        }        ...        @Override        protected LayoutParams onCreateLayoutParams() {            LinearLayout.LayoutParams lp = new LinearLayout.LayoutParams(                    ViewGroup.LayoutParams.WRAP_CONTENT, mIconSize);            lp.setMargins(mIconHPadding, 0, mIconHPadding, 0);            return lp;        }}

这里可以设置一个margin,原生设置的0。

0dp

注意坑在这里，不管这里的margin值设为多少，最后并不会生效，因为在StatusIconContainer.java类中onLayout()方法中并没有考虑这个margin

 @Override    protected void onLayout(boolean changed, int l, int t, int r, int b) {        float midY = getHeight() / 2.0f;        // Layout all child views so that we can move them around later        for (int i = 0; i < getChildCount(); i++) {            View child = getChildAt(i);            int width = child.getMeasuredWidth();            int height = child.getMeasuredHeight();            int top = (int) (midY - height / 2.0f);            child.layout(0, top, width, top + height);        }        resetViewStates();        calculateIconTranslations();        applyIconStates();    }

既然添加margin不行，那就添加padding,如文章开头的代码所示。

操作

原理

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