本文共 8042 字，大约阅读时间需要 26 分钟。

之前写过一遍6.0的导航栏屏蔽分析过程，可参考

屏蔽状态栏下拉

6.0解决办法

源码位置 SystemUI\src\com\android\systemui\statusbar\phone\PhoneStatusBarView.java

@Override    public boolean onTouchEvent(MotionEvent event) {
           boolean barConsumedEvent = mBar.interceptTouchEvent(event);        if (DEBUG_GESTURES) {
               if (event.getActionMasked() != MotionEvent.ACTION_MOVE) {
                   EventLog.writeEvent(EventLogTags.SYSUI_PANELBAR_TOUCH,                        event.getActionMasked(), (int) event.getX(), (int) event.getY(),                        barConsumedEvent ? 1 : 0);            }        }        // return barConsumedEvent || super.onTouchEvent(event);		return false;    }

直接返回false，action_move不会执行，代码看似简单，实则super.onTouchEvent(event)调用的是PanelBar.java中的onTouchEvent()

8.1解决办法（同上）

6.0和8.1的状态栏代码是有差异的，但是通过上面的方法都能达到需求效果

6.0的PhoneStatusBarView调用onTouchEvent()，最终调用PanelBar的onTouchEvent()

8.1的PhoneStatusBarView调用onTouchEvent()，接着调用PanelBar的onTouchEvent()，最终调用PanelView的onTouchEvent()

从根本上阻止事件的传递来达到屏蔽下拉的效果

补充

如果需要动态的控制是否允许下拉状态栏，可以通过广播通知，接受传递的参数，持久化保存(可通过SharedPreference或者Settings.Global.xxxx)当前状态栏的状态，一般建议采用Settings.Global保存。

具体步骤

1. 在frameworks\base\core\java\android\provider\Settings.java中Globel内部类下添加变量名称，比如OPEN_PANEL_ENABLED
2. 通过make update-api指令重新编译，因为在Settings中修改后需要编译才能对应到这两文件frameworks/base/api/system-current.txt、frameworks/base/api/current.txt
3. 在广播接收的地方通过Settings.Global.putInt(context.getContentResolver(), Settings.Global.OPEN_PANEL_ENABLED, 1) 保存值
   （ps 可通过adb命令 adb shell settings put global open_panel_enabled 1 模拟写入 adb shell settings get global open_panel_enabled 模拟查看）
4. 将刚刚的return false改成

boolean flag=Settings.Global.getInt(getContext().getContentResolver(), Settings.Global.OPEN_PANEL_ENABLED,1)==1;return flag ? barConsumedEvent || super.onTouchEvent(event) : flag;

屏蔽导航栏显示

6.0解决办法

源码位置SystemUI\src\com\android\systemui\statusbar\phone\PhoneStatusBar.java

@Override    public void start() {
           mDisplay = ((WindowManager)mContext.getSystemService(Context.WINDOW_SERVICE))                .getDefaultDisplay();        updateDisplaySize();        mScrimSrcModeEnabled = mContext.getResources().getBoolean(                R.bool.config_status_bar_scrim_behind_use_src);        super.start(); // calls createAndAddWindows()        mMediaSessionManager                = (MediaSessionManager) mContext.getSystemService(Context.MEDIA_SESSION_SERVICE);        // TODO: use MediaSessionManager.SessionListener to hook us up to future updates        // in session state         addNavigationBar();		 .....    }

直接注释addNavigationBar()就能达到需求效果

8.1解决办法

源码位置SystemUI\src\com\android\systemui\statusbar\phone\StatusBar.java

protected void makeStatusBarView() {
           final Context context = mContext;        updateDisplaySize(); // populates mDisplayMetrics        updateResources();        updateTheme();        ....        try {
               boolean showNav = mWindowManagerService.hasNavigationBar();            if (DEBUG) Log.v(TAG, "hasNavigationBar=" + showNav);            if (showNav) {
                   createNavigationBar();            }        } catch (RemoteException ex) {
               // no window manager? good luck with that        }        ....    }

直接注释createNavigationBar()或者将showNav=false就能达到需求效果

代码流程分析

6.0和8.1的导航栏都是通过WindowManager的addView来添加的，通过WindowManager的removeViewImmediate来移除

1、6.0的addNavigationBar实现，通过addView将mNavigationBarView添加，prepareNavigationBarView方法设置了点击、触摸、长按事件，无需关心

private void addNavigationBar() {
           if (DEBUG) Log.v(TAG, "addNavigationBar: about to add " + mNavigationBarView);        if (mNavigationBarView == null) return;        prepareNavigationBarView();        mWindowManager.addView(mNavigationBarView, getNavigationBarLayoutParams());        mNavigationShown=true;    }

查找到在makeStatusBarView()中，mNavigationBarView初始化,加载navigation_bar布局文件

protected PhoneStatusBarView makeStatusBarView() {
           final Context context = mContext;        Resources res = context.getResources();        updateDisplaySize(); // populates mDisplayMetrics        updateResources();		...		mNavigationBarView = (NavigationBarView) View.inflate(context, R.layout.navigation_bar, null);        mNavigationBarView.setDisabledFlags(mDisabled1);        mNavigationBarView.setBar(this);        mNavigationBarView.setOnVerticalChangedListener(                new NavigationBarView.OnVerticalChangedListener() {
               @Override            public void onVerticalChanged(boolean isVertical) {
                   if (mAssistManager != null) {
                       mAssistManager.onConfigurationChanged();                }                mNotificationPanel.setQsScrimEnabled(!isVertical);            }        });        mNavigationBarView.setOnTouchListener(new View.OnTouchListener() {
               @Override            public boolean onTouch(View v, MotionEvent event) {
                   checkUserAutohide(v, event);                return false;            }});	}

2、8.1的createNavigationBar实现，发现是通过NavigationBarFragment来实例化mNavigationBarView

protected void createNavigationBar() {
           mNavigationBarView = NavigationBarFragment.create(mContext, (tag, fragment) -> {
               mNavigationBar = (NavigationBarFragment) fragment;            if (mLightBarController != null) {
                   mNavigationBar.setLightBarController(mLightBarController);            }            mNavigationBar.setCurrentSysuiVisibility(mSystemUiVisibility);        });    }

NavigationBarFragment的crate方法通过addView将mNavigationBarView添加，加载navigation_bar_window布局

public static View create(Context context, FragmentListener listener) {
           WindowManager.LayoutParams lp = new WindowManager.LayoutParams(                LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT,                WindowManager.LayoutParams.TYPE_NAVIGATION_BAR,                WindowManager.LayoutParams.FLAG_TOUCHABLE_WHEN_WAKING                        | WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE                        | WindowManager.LayoutParams.FLAG_NOT_TOUCH_MODAL                        | WindowManager.LayoutParams.FLAG_WATCH_OUTSIDE_TOUCH                        | WindowManager.LayoutParams.FLAG_SPLIT_TOUCH                        | WindowManager.LayoutParams.FLAG_SLIPPERY,                PixelFormat.TRANSLUCENT);        lp.token = new Binder();        lp.setTitle("NavigationBar");        lp.windowAnimations = 0;        View navigationBarView = LayoutInflater.from(context).inflate(                R.layout.navigation_bar_window, null);        if (DEBUG) Log.v(TAG, "addNavigationBar: about to add " + navigationBarView);        if (navigationBarView == null) return null;        context.getSystemService(WindowManager.class).addView(navigationBarView, lp);        FragmentHostManager fragmentHost = FragmentHostManager.get(navigationBarView);        NavigationBarFragment fragment = new NavigationBarFragment();        fragmentHost.getFragmentManager().beginTransaction()                .replace(R.id.navigation_bar_frame, fragment, TAG)                .commit();        fragmentHost.addTagListener(TAG, listener);        return navigationBarView;    }

补充

依旧是通过广播来动态控制导航栏的显示和隐藏

6.0已在开头文章中写过，这里就只补充8.1的显示和隐藏

源码位置SystemUI\src\com\android\systemui\statusbar\phone\StatusBar.java

private static final String SHOW_NAVIGATION = "cc.intent.systemui.shownavigation";    private static final String HIDE_NAVIGATION = "cc.intent.systemui.hidenavigation";	 private BroadcastReceiver mBroadcastReceiver = new BroadcastReceiver() {
           @Override        public void onReceive(Context context, Intent intent) {
               Log.e(TAG, "onReceive: " + intent);            String action = intent.getAction();            if (HIDE_NAVIGATION.equals(action)) {
                   if (mNavigationBarView == null) return;                mWindowManager.removeViewImmediate(mNavigationBarView);                mNavigationBarView = null;            }else if (SHOW_NAVIGATION.equals(action)) {
                   if (mNavigationBarView != null) return;                createNavigationBar();            }        }    };

转载地址：https://cczheng.blog.csdn.net/article/details/89156391 如侵犯您的版权，请留言回复原文章的地址，我们会给您删除此文章，给您带来不便请您谅解！