[RK3288][Android6.0] 调试笔记 --- 动态显示和隐藏导航栏(广播方式)

Platform: Rockchip
OS: Android 6.0
Kernel: 3.10.92

直接移除导航栏在 [RK3288][Android6.0] 调试笔记 — 移除导航栏(虚拟按键) 已经给出，

此文实现以广播的形式动态显示和隐藏导航栏，这样不仅避免了系统通过了自带只针对Activity显示和隐藏的不便(比如一个app有N多个Activity)，而且可以在任何地方去动态修改。
改动：

diff --git a/packages/SystemUI/src/com/android/systemui/statusbar/phone/PhoneStatusBar.java b/packages/SystemUI/src/com/android/systemui/statusbar/phone/PhoneStatusBar.javaindex 7c73b83..7da188d 100755--- a/packages/SystemUI/src/com/android/systemui/statusbar/phone/PhoneStatusBar.java+++ b/packages/SystemUI/src/com/android/systemui/statusbar/phone/PhoneStatusBar.java@@ -204,6 +204,10 @@ public class PhoneStatusBar extends BaseStatusBar implements DemoMode,         DragDownHelper.DragDownCallback, ActivityStarter, OnUnlockMethodChangedListener,         HeadsUpManager.OnHeadsUpChangedListener {     static final String TAG = "PhoneStatusBar";+    /*Kris, 170726, hide/show NavigationBar dynamicly. {*/+    static final String HIDE_NAVIGATION_BAR = "android.intent.action.HIDE_NAVIGATION_BAR";+    static final String SHOW_NAVIGATION_BAR = "android.intent.action.SHOW_NAVIGATION_BAR";+    /*Kris, 170726, hide/show NavigationBar dynamicly. }*/     public static final boolean DEBUG = BaseStatusBar.DEBUG;     public static final boolean SPEW = false;     public static final boolean DUMPTRUCK = true; // extra dumpsys info@@ -1069,6 +1073,10 @@ public class PhoneStatusBar extends BaseStatusBar implements DemoMode,             demoFilter.addAction(ACTION_FAKE_ARTWORK);         }         demoFilter.addAction(ACTION_DEMO);+        /*Kris, 170726, hide/show NavigationBar dynamicly. {*/+    demoFilter.addAction(HIDE_NAVIGATION_BAR);+        demoFilter.addAction(SHOW_NAVIGATION_BAR);+    /*Kris, 170726, hide/show NavigationBar dynamicly. }*/         context.registerReceiverAsUser(mDemoReceiver, UserHandle.ALL, demoFilter,                 android.Manifest.permission.DUMP, null);@@ -1304,9 +1312,48 @@ public class PhoneStatusBar extends BaseStatusBar implements DemoMode,         mWindowManager.addView(mNavigationBarView, getNavigationBarLayoutParams());     }+    /*Kris, 170726, hide/show NavigationBar dynamicly. {*/+    private void addNavigationBarInnerLocked(){+        if(mNavigationBarView == null){+            mNavigationBarView = (NavigationBarView) View.inflate(mContext, R.layout.navigation_bar, null);+            mNavigationBarView.setDisabledFlags(mDisabled1);+            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) {+                }+        }+    }++    private void removeNavigationBar() {+        if (mNavigationBarView == null)+            return;+        mWindowManager.removeView(mNavigationBarView);+        mNavigationBarView = null;+    }++    public void displayNavigation(){+        addNavigationBarInnerLocked();+    }+    public void hideNavigation(){+        removeNavigationBar();+    }+    /*Kris, 170726, hide/show NavigationBar dynamicly. }*/+     private void repositionNavigationBar() {         if (mNavigationBarView == null || !mNavigationBarView.isAttachedToWindow()) return;+         prepareNavigationBarView();         mWindowManager.updateViewLayout(mNavigationBarView, getNavigationBarLayoutParams());@@ -3117,7 +3164,13 @@ public class PhoneStatusBar extends BaseStatusBar implements DemoMode,                 if (DEBUG_MEDIA_FAKE_ARTWORK) {                     updateMediaMetaData(true);                 }-            }+        /*Kris, 170726, hide/show NavigationBar dynamicly. {*/+            }  else     if(HIDE_NAVIGATION_BAR.equals(action)){+            hideNavigation();+        }else if(SHOW_NAVIGATION_BAR.equals(action)){+            displayNavigation();+        }+        /*Kris, 170726, hide/show NavigationBar dynamicly. }*/         }     };

测试：
隐藏：
root@rk3288:/ # am broadcast -a android.intent.action.HIDE_NAVIGATION_BAR
Broadcasting: Intent { act=android.intent.action.HIDE_NAVIGATION_BAR }
Broadcast completed: result=0

显示：
root@rk3288:/ # am broadcast -a android.intent.action.SHOW_NAVIGATION_BAR
Broadcasting: Intent { act=android.intent.action.SHOW_NAVIGATION_BAR }
Broadcast completed: result=0

参考：
在命令行中通过adb shell am broadcast发送广播通知