文章目录
- 前言
- 一、创建全局变量
- 二、设置应用添加隐藏导航栏按钮
- 三、添加按钮功能
- 四、动态隐藏还有显示功能
- 五、创建系统导航栏广播接口
- 总结
前言
关于Android系统的状态栏,不同的客户有不同的需求: 有些客户需要永久隐藏状态栏,有些客户需要在设置显示中添加按钮可自行选择是否显示和隐藏,有些客户需要给出调用接口供APP去调用设置等;
一、创建全局变量
1、创建全局变量并保存状态栏状态,是为了系统级应用和整个框架层都能获取到该变量值,该变量值在掉电或者重启都不会丢失(除了恢复出厂设置Q 或者重刷系统固件之外) ;
2、创建全局变量
 配置路径: frameworks/base/core/java/android/provider/Settings.java
 定义了一个SYSTEM_HIDE_STATUS_BAR 全局变量: SYSTEM_HIDE_STATUS_BAR = “hide_status_bar”
 这个是需要放在 public static final class System extends NameValueTable {
 里面的哦
/**
* add by LQX at 20240116
*/
public static final String SYSTEM_HIDE_STATUS_BAR = "hide_status_bar";
3、定义全局变量的默认值
 配置路径: frameworks/base/packages/SettingsProvider/res/values/defaults.xml
 设置引用的名称格式为: def_ + SYSTEM_HIDE_STATUS_BAR 的字符值 = def_hide_status_bar,值为bool类型;
 值为true: 隐藏状态栏;
 值为false: 显示状态栏;
<!-- add by LQX --><bool name="def_hide_status_bar">false</bool>
<!-- end, add by LQX -->
二、设置应用添加隐藏导航栏按钮
1、在 设置->显示 里添加导航栏按钮;
 2、按钮标题为“隐藏导航栏”
 这里以英文和中文字体为例,其他字体需要的话也同理添加;
 英文字体(系统为英文语言时显示) : packages/apps/Settings/res/values/strings.xml
<!-- add by LQX-->
<string name="hide_status_bar">Hide Status Bar</string>
<!-- end, add by LQX-->
中文字体: packages/apps/Settings/res/values-zh-rCN/strings.xml
<!-- add by LQX-->
<string name="hide_status_bar">隐藏状态栏</string>
<!-- end, add by LQX-->
3、添加按钮布局
 (1) 选择在 设置->显示 里面添加
 对应的布局文件: packages/apps/Settings/res/xml/display_settings.xml
 对应的按钮类型,这里选择为: SwitchPreference
(2)在对应的位置添加按钮控件
 这里选择是在“屏幕超时”后面添加:
 android:key=“hide_status_bar” ===>按钮控制健值
 android:title=“@string/hide_status_bar”= = >标题,使用上面2中配置好的
<!-- add by LQX--><SwitchPreferenceandroid:key="hide_status_bar"android:title="@string/hide_status_bar" /><!-- end,add by LQX-->
4、这样按钮就能在 设置->显示 中,显示出来了
 但此时点击按钮是没有作用的,对应的按钮功能还没有添加进去:

三、添加按钮功能
1、添加功能代码
 创建一个java文件:
 目录路径: packages/apps/Settings/src/com/android/settings/display/
 创建一个java文件: HideStatusBarPreferenceController
 功能代码如下:
package com.android.settings.display;import android.content.Context;
import android.provider.Settings;
import androidx.preference.SwitchPreference;
import androidx.preference.Preference;import com.android.settings.core.PreferenceControllerMixin;
import com.android.settingslib.core.AbstractPreferenceController;
import android.content.Intent;
import android.util.Log;public class HideStatusBarPreferenceController extends AbstractPreferenceController implementsPreferenceControllerMixin, Preference.OnPreferenceChangeListener {private static final String TAG = "HideStatusBar";private static final boolean DEBUG = true;private static final String KEY_HIDE_STATUS_BAR = "hide_status_bar";public static final String ACTION_HIDE_STATUS_BAR = "action.ACTION_HIDE_STATUS_BAR";public HideStatusBarPreferenceController(Context context) {super(context);}@Overridepublic String getPreferenceKey() {return KEY_HIDE_STATUS_BAR;}@Overridepublic boolean isAvailable() {return true;}@Overridepublic void updateState(Preference preference) {int value = Settings.System.getInt(mContext.getContentResolver(), Settings.System.SYSTEM_HIDE_STATUS_BAR, 0);((SwitchPreference) preference).setChecked(value != 0);}@Overridepublic boolean onPreferenceChange(Preference preference, Object newValue) {boolean value = (Boolean) newValue;if(DEBUG) {Log.d(TAG, "key value " + value);}Settings.System.putInt(mContext.getContentResolver(), Settings.System.SYSTEM_HIDE_STATUS_BAR, value ? 1 : 0);Intent intent = new Intent(ACTION_HIDE_STATUS_BAR);mContext.sendBroadcast(intent); //发送广播return true;}
}
四、动态隐藏还有显示功能
1、相关修改代码文件:
frameworks/base/packages/SystemUI\src\com/android/systemui/statusbar/phone/StatusBar.java
frameworks/base/packages/SystemUI/src/com/android/systemui/statusbar/NavigationBarController.java
2、主要修改代码
 路径:frameworks/base/packages/SystemUl/src/com/android/systemui/lstatusbar/phone/StatusBar.java
--- a/frameworks/base/packages/SystemUI/src/com/android/systemui/statusbar/phone/StatusBar.java
+++ b/frameworks/base/packages/SystemUI/src/com/android/systemui/statusbar/phone/StatusBar.java
@@ -259,6 +259,8 @@ public class StatusBar extends SystemUI implements DemoMode,public static final String SYSTEM_DIALOG_REASON_RECENT_APPS = "recentapps";static public final String SYSTEM_DIALOG_REASON_SCREENSHOT = "screenshot";+	public static final String ACTION_HIDE_STATUS_BAR = "action.ACTION_HIDE_STATUS_BAR"; //add by LQX
+	private static final String BANNER_ACTION_CANCEL ="com.android.systemui.statusbar.banner_action_cancel";private static final String BANNER_ACTION_SETUP =
@@ -1099,7 +1101,20 @@ public class StatusBar extends SystemUI implements DemoMode,mNotificationPanelViewController.setHeadsUpManager(mHeadsUpManager);mNotificationLogger.setHeadsUpManager(mHeadsUpManager);//createNavigationBar(result);
+       setStatusBar(); //add by LQX开机设置状态栏栏状态
+if (ENABLE_LOCKSCREEN_WALLPAPER && mWallpaperSupported) {mLockscreenWallpaper = mLockscreenWallpaperLazy.get();
@@ -1288,6 +1303,7 @@ public class StatusBar extends SystemUI implements DemoMode,filter.addAction(Intent.ACTION_CLOSE_SYSTEM_DIALOGS);filter.addAction(Intent.ACTION_SCREEN_OFF);filter.addAction(DevicePolicyManager.ACTION_SHOW_DEVICE_MONITORING_DIALOG);
+		 filter.addAction(ACTION_HIDE_STATUS_BAR); //add by LQX接收设置应用发送出来的广播mBroadcastDispatcher.registerReceiver(mBroadcastReceiver, filter, null, UserHandle.ALL);}@@ -1362,6 +1378,45 @@ public class StatusBar extends SystemUI implements DemoMode,}}
+//add by LQX
+private void setStatusBar() {
+            boolean hideStatusBar = Settings.System.getInt(mContext.getContentResolver(),Settings.System.SYSTEM_HIDE_STATUS_BAR,0) != 0;
++                   if(hideStatusBar)+                  hideStatusBar();+         else{+                showStatusBar();+           }+  }
++              private void showStatusBar() {+              if (mPhoneStatusBarWindow!=null){+                     Log.d(TAG,"====== show StatusBar ======");+                               mPhoneStatusBarWindow.setVisibility(View.VISIBLE);+               }+      }
++           private void hideStatusBar() {+              if (mPhoneStatusBarWindow != null){+                     Log.d(TAG,"====== hide StatusBar ======");+                    mPhoneStatusBarWindow.setVisibility(View.GONE);+               }+      }
+//end,add by LQX
+// TODO(b/117478341): This was left such that CarStatusBar can override this method.// Try to remove this.
@@ -2804,6 +2862,10 @@ public class StatusBar extends SystemUI implements DemoMode,}else if (DevicePolicyManager.ACTION_SHOW_DEVICE_MONITORING_DIALOG.equals(action)) {mQSPanel.showDeviceMonitoringDialog();
+            } 
+			else if(ACTION_HIDE_STATUS_BAR.equals(action)) {
+                setStatusBar();
+           }}}};
4、现在系统默认是隐藏导航栏,如需默认隐藏状态栏,请按下面的设置即可
 文件:frameworks/base/packages/SettingsProvider/res/values/defaults.xm
 值为true: 隐藏状态栏:
 值为false: 显示状态栏
<bool name="def_hide_status_bar">true</bool>
五、创建系统导航栏广播接口
1、定义导航栏显示与隐藏的广播
    public static final String ACTION_API_HIDE_STATUS_BAR = "action.ACTION_API_HIDE_STATUS_BAR"; //add by LQX 隐藏状态栏广播public static final String ACTION_API_SHOW_STATUS_BAR = "action.ACTION_API_SHOW_STATUS_BAR"; //add by LQX 显示状态栏广播
2、系统代码实现
 文件路径:frameworks/base/packages/SystemUl/src/com/android/systemui/statusbar/phone/StatusBar.java
 创建了两个接收广播,待应用发送这两个广播来实现导航栏隐藏和显示;
--- a/frameworks/base/packages/SystemUI/src/com/android/systemui/statusbar/phone/StatusBar.java
+++ b/frameworks/base/packages/SystemUI/src/com/android/systemui/statusbar/phone/StatusBar.java
@@ -259,6 +259,10 @@ public class StatusBar extends SystemUI implements DemoMode,public static final String SYSTEM_DIALOG_REASON_RECENT_APPS = "recentapps";static public final String SYSTEM_DIALOG_REASON_SCREENSHOT = "screenshot";public static final String ACTION_HIDE_NAVIGATION = "action.ACTION_HIDE_NAVIGATION"; //add by LQX
+       public static final String ACTION_API_HIDE_STATUS_BAR = "action.ACTION_API_HIDE_STATUS_BAR"; //add by LQX 隐藏状态栏广播
+       public static final String ACTION_API_SHOW_STATUS_BAR = "action.ACTION_API_SHOW_STATUS_BAR"; //add by LQX 显示状态栏广播
+       private static final String BANNER_ACTION_CANCEL ="com.android.systemui.statusbar.banner_action_cancel";
@@ -1288,6 +1305,9 @@ public class StatusBar extends SystemUI implements DemoMode,filter.addAction(Intent.ACTION_CLOSE_SYSTEM_DIALOGS);filter.addAction(Intent.ACTION_SCREEN_OFF);filter.addAction(DevicePolicyManager.ACTION_SHOW_DEVICE_MONITORING_DIALOG);filter.addAction(ACTION_HIDE_NAVIGATION); //add by LQX
+        filter.addAction(ACTION_API_HIDE_STATUS_BAR); //add by LQX 添加到广播队列里
+        filter.addAction(ACTION_API_SHOW_STATUS_BAR); //add by LQX 添加到广播队列里mBroadcastDispatcher.registerReceiver(mBroadcastReceiver, filter, null, UserHandle.ALL);}// TODO(b/117478341): This was left such that CarStatusBar can override this method.// Try to remove this.protected void createNavigationBar(@Nullable RegisterStatusBarResult result) {
@@ -2804,7 +2878,19 @@ public class StatusBar extends SystemUI implements DemoMode,}else if (DevicePolicyManager.ACTION_SHOW_DEVICE_MONITORING_DIALOG.equals(action)) {mQSPanel.showDeviceMonitoringDialog();}  else if(ACTION_HIDE_STATUS_BAR.equals(action)) {setStatusBar();}
+            else if(ACTION_API_HIDE_STATUS_BAR.equals(action)) {
+               hideStatusBar(); //隐藏状态栏
+         }
+        else if(ACTION_API_SHOW_STATUS_BAR.equals(action)) {
+           showStatusBar(); //显示状态栏
+      }}总结
教程结束!编译成功后可以先用adb测试:
 PS:对了!踩到的坑,改了系统api需要更新
make update-api
adb shell
am broadcast -a "action.ACTION_API_SHOW_STATUS_BAR"
am broadcast -a "action.ACTION_API_HIDE_STATUS_BAR"