Android5.1永久隐藏工具栏定制

最近有个需求： 勾选"永久隐藏工具栏"时，要求导航栏隐藏，状态栏不隐藏。

一. 源码中找到/packages/apps/Settings/src/com/android/settings/DisplaySettings.java:

可以看到勾选"永久隐藏工具栏"时发送了个广播，

@Override
    public boolean onPreferenceTreeClick(PreferenceScreen preferenceScreen, Preference preference) {
        if(preference == mSystemBarHide)
    {
        if(mSystemBarHide.isChecked()){
        Intent i = new Intent("com.cdhx.removebar");
        getActivity().sendBroadcast(i);
        } else {
        Intent i = new Intent("com.cdhx.addbar");
        getActivity().sendBroadcast(i);
        }
        }
        return super.onPreferenceTreeClick(preferenceScreen, preference);
    }

二. 在/frameworks/base/packages/SystemUI/src/com/android/systemui/statusbar/phone/PhoneStatusBar.java：

2.1.找到对应的广播动作：

else if("com.cdhx.removebar".equals(action)) {
                      Settings.System.putInt(mContext.getContentResolver(), Settings.System.SYSTEMBAR_HIDE,1);
                       mHandler.removeMessages(MSG_CHANGE_BAR_HIDE_STATUS);
                       mHandler.sendEmptyMessageDelayed(MSG_CHANGE_BAR_HIDE_STATUS, 400);
            }

2.2.对应的更新UI消息：

case MSG_CHANGE_BAR_HIDE_STATUS:
                       changeBarHideStatus();
                       break;

找到changeBarHideStatus();

 private void changeBarHideStatus()
        {
            boolean hide_systembar = Settings.System.getInt(mContext.getContentResolver(),Settings.System.SYSTEMBAR_HIDE,0)==1;

            if(hide_systembar)
                removeBar(false);
            else{
                addBarInside(hide_systembar);   
            }
        }

三.找到removeBar( ):

private void removeBar(boolean needToast){
                if (mBarIsAdd){
                        Log.d(TAG,"remove Bar");
                    if(mContext.getResources().getConfiguration().enableMultiWindow()){
                        try {
                            mWindowManagerService.changeTitleBar(false);
                        } catch (RemoteException e) {
                            Log.w(TAG, "Error changeTitleBar transition: " + e);
                        }
                        }
                        if (mNavigationBarView != null){
                                mWindowManager.removeViewImmediate(mNavigationBarView);
                       }
                       if (!mContext.getResources().getConfiguration().enableMultiWindow()&&mStatusBarWindow != null)
                               mStatusBarWindow.setVisibility(View.GONE);
                      if(signalCluster_win!=null)
                          signalCluster_win=null;
                      if (mNavigationBarView != null)
                          mNavigationBarView = null;
                          
                      if(mNotificationLite != null){
                        mNotificationLite.closeCenter();
                      }
                        mBarIsAdd = false;
                        if(!isMultiChange)
                        Toast.makeText(mContext, mContext.getResources().getString(R.string.hidebar_msg)
, 1000).show();
                }
        }

可以看到如上加厚的状态栏这句。将其注释掉，即可实现勾选"永久隐藏工具栏"时，导航栏隐藏而状态栏不隐藏。