android4.4动态隐藏NavigationBar

爱被打了一巴掌 2022-06-07 03:24 328阅读 0赞

最近试了下动态隐藏NavigationBar作下记录

在设置->显示里增加控制动态显示与隐藏Navigationbar的功能。

首先修改设置->显示增加相关图形界面

修改文件系统源码packages/apps/Settings/res/xml/display\_settings.xml中增加

<CheckBoxPreference
                android:key="navbar"
                android:title="@string/hide_navbar_title"
                android:persistent="false" />

修改packages/apps/Settings/res/values/strings.xml增加

<string name="hide_navbar_title">Hide NavigationBar</string>

这样显示部分就出出来了，接着完善功能

修改packages/apps/Settings/src/com/android/settings/DisplaySettings.java增加如下内容

import android.content.Intent;

private static final String KEY_NAVIGATION_BAR = "navbar";
        public static String ACTION_HIDE_NAV_BAR = "gzsd.hclydao.action.hide_nav_bar";
        public static String ACTION_SHOW_NAV_BAR = "gzsd.hclydao.action.show_nav_bar";
    
        private CheckBoxPreference mHideNav; //add by hclydao

加入初始化相关代码

//add by hclydao
    		mHideNav = (CheckBoxPreference) findPreference(KEY_NAVIGATION_BAR);
    		mHideNav.setPersistent(false);
    		//add end
    
    		int navcheck = Settings.Global.getInt(resolver, Settings.Global.HIDE_NAVBAR,0);
    		if(navcheck == 1)
    			mHideNav.setChecked(true);

然后在onPreferenceTreeClick条件判断最后加上

} else if(preference == mHideNav) { //add by hclydao
    			boolean isCheck = mHideNav.isChecked();
    			Intent mychange;
    			if(isCheck) {
    				Settings.Global.putInt(getContentResolver(), Settings.Global.HIDE_NAVBAR, 1);
    		        mychange = new Intent(ACTION_HIDE_NAV_BAR);
    			} else {
    				Settings.Global.putInt(getContentResolver(), Settings.Global.HIDE_NAVBAR, 0);
    		        mychange = new Intent(ACTION_SHOW_NAV_BAR);
    			}
    			getActivity().sendBroadcast(mychange);
    		}

发送变化广播.

接着加入全局设置，让设置状态能够保存

修改frameworks/base/core/java/android/provider/Settings.java

在适合位置加入

public static final String HIDE_NAVBAR = "hide_navbar";

最后修改接收变化广播的地方:

frameworks/base/policy/src/com/android/internal/policy/impl/PhoneWindowManager.java

增加

public static String ACTION_HIDE_NAV_BAR = "gzsd.hclydao.action.hide_nav_bar";
    	public static String ACTION_SHOW_NAV_BAR = "gzsd.hclydao.action.show_nav_bar";

//add by hclydao
        int[] oNavigationBarHeightForRotation = new int[4];
        int[] oNavigationBarWidthForRotation = new int[4];

这个用来保存原始的相关数据

在init最后增加

//add by hclydao
            filter = new IntentFilter();
            filter.addAction(ACTION_HIDE_NAV_BAR);
            filter.addAction(ACTION_SHOW_NAV_BAR);
            context.registerReceiver(mHideNavBarReceiver, filter);

及广播接收类

//add by hclydao
        BroadcastReceiver mHideNavBarReceiver = new BroadcastReceiver() {
            @Override
            public void onReceive(Context context, Intent intent) {
    			if(intent.getAction().equals(ACTION_HIDE_NAV_BAR)) {
    				hideNavBar();
    				//Settings.Global.putInt(mContext.getContentResolver(), Settings.Global.HIDE_NAVBAR, 1);
    			} else if(intent.getAction().equals(ACTION_SHOW_NAV_BAR)) {
    				showNavBar();
    				//Settings.Global.putInt(mContext.getContentResolver(), Settings.Global.HIDE_NAVBAR, 0);
    			}
            }
        };

和相关操作函数

//add by hclydao
    	public void hideNavBar() {
    		//Slog.d(TAG,"hideNavBar");
    		if((mNavigationBarHeightForRotation[mPortraitRotation] == 0)
    			&& (mNavigationBarHeightForRotation[mUpsideDownRotation] == 0)
    			&& (mNavigationBarHeightForRotation[mLandscapeRotation] == 0)
    			&& (mNavigationBarHeightForRotation[mSeascapeRotation] == 0))
    			return;
    		else {
    			oNavigationBarHeightForRotation = mNavigationBarHeightForRotation;
    			oNavigationBarWidthForRotation = mNavigationBarWidthForRotation;
    			mNavigationBarHeightForRotation = new int[4];
    			mNavigationBarWidthForRotation = new int[4];
    		}
    		updateRotation(false);
    	}
    
    	public void showNavBar() {
    		//Slog.d(TAG,"showNavBar");
    		mNavigationBarHeightForRotation = oNavigationBarHeightForRotation;
    		mNavigationBarWidthForRotation = oNavigationBarWidthForRotation;
    		updateRotation(false);
    	}

最后在beginLayoutLw函数最后增加

//hclydao
    		int navcheck = Settings.Global.getInt(mContext.getContentResolver(), Settings.Global.HIDE_NAVBAR,0);
    		if(navcheck != 0)
    			hideNavBar();

得到初始状态.

基本上修改完成，编译之前需要先更新一下api,效果如下:

![20171009135208901][]

![20171009135219629][]

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作者：hclydao  
[http://blog.csdn.net/hclydao][http_blog.csdn.net_hclydao]  
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[20171009135208901]: /images/20220607/95ef7a002a734fab963790340c054008.png
[20171009135219629]: /images/20220607/df2e8e6a98984eef92459f4d671d6796.png
[http_blog.csdn.net_hclydao]: http://blog.csdn.net/hclydao