A Method for Dynamically Hiding the Status Bar on Android 11

[george]

diff --git a/packages/SystemUI/src/com/android/systemui/statusbar/phone/PhoneStatusBar.java b/packages/SystemUI/src/com/android/systemui/statusbar/phone/PhoneStatusBar.java
index c1d54b7..6228ef0 100755
--- a/packages/SystemUI/src/com/android/systemui/statusbar/phone/PhoneStatusBar.java
+++ b/packages/SystemUI/src/com/android/systemui/statusbar/phone/PhoneStatusBar.java
@@ -202,6 +202,8 @@ import java.util.Map;
 public class PhoneStatusBar extends BaseStatusBar implements DemoMode,
         DragDownHelper.DragDownCallback, ActivityStarter, OnUnlockMethodChangedListener {
     static final String TAG = "PhoneStatusBar";
+    static final String HIDE_NAVIGATION_BAR = "android.intent.action.HIDE_NAVIGATION_BAR";
+    static final String SHOW_NAVIGATION_BAR = "android.intent.action.SHOW_NAVIGATION_BAR";
     public static final boolean DEBUG = BaseStatusBar.DEBUG;
     public static final boolean SPEW = false;
     public static final boolean DUMPTRUCK = true; // extra dumpsys info
@@ -1090,6 +1092,8 @@ final Object mScreenshotLock = new Object();
             filter.addAction("fake_artwork");
         }
         filter.addAction(ACTION_DEMO);
+		    filter.addAction(HIDE_NAVIGATION_BAR);
+        filter.addAction(SHOW_NAVIGATION_BAR);
         context.registerReceiverAsUser(mBroadcastReceiver, UserHandle.ALL, filter, null, null);
 
         // listen for USER_SETUP_COMPLETE setting (per-user)
@@ -1381,6 +1385,12 @@ final Object mScreenshotLock = new Object();
              return false;
          }
      };
+	 
+	    private void removeNavigationBar() {
+        if (mNavigationBarView == null) return;
+        		mWindowManager.removeView(mNavigationBarView);
+        		mNavigationBarView = null;
+      }	
       //$_rbox_$_modify_$_huangjc,add add/remove bar button	
       private View.OnTouchListener mHidebarPreloadOnTouchListener = new View.OnTouchListener() {
 
@@ -1475,6 +1485,32 @@ final Object mScreenshotLock = new Object();
         mWindowManager.addView(mNavigationBarView, getNavigationBarLayoutParams());
     }
 
+	  private void addNavigationBarInnerLocked(){
+	      if(mNavigationBarView == null){
+		       mNavigationBarView = (NavigationBarView) View.inflate(mContext, R.layout.navigation_bar, null);	
+			     mNavigationBarView.setDisabledFlags(mDisabled);
+			     mNavigationBarView.setBar(this);
+			     mNavigationBarView.setOnTouchListener(new View.OnTouchListener() {
+				@Override
+				public boolean onTouch(View v, MotionEvent event) {
+					checkUserAutohide(v, event);
+					return false;
+				}});
+		    if (mNavigationBarView == null) return;
+		
+		       prepareNavigationBarView();
+		      try {
+		           mWindowManager.addView(mNavigationBarView, getNavigationBarLayoutParams());
+		            } catch (Exception e) {
+                  }	
+	      }
+    }
+    public void displayNavigation(){
+    	addNavigationBarInnerLocked();
+    }
+    public void hideNavigation(){
+    	removeNavigationBar();
+    }
     private void repositionNavigationBar() {
         if (mNavigationBarView == null || !mNavigationBarView.isAttachedToWindow()) return;
 
@@ -3436,7 +3472,11 @@ final Object mScreenshotLock = new Object();
                 if (DEBUG_MEDIA_FAKE_ARTWORK) {
                     updateMediaMetaData(true);
                 }
-            }
+            }else if(HIDE_NAVIGATION_BAR.equals(action)){
+               hideNavigation();
+            }else if(SHOW_NAVIGATION_BAR.equals(action)){
+               displayNavigation();
+		}
         }
     };