Android 11.0 在全部应用界面下，实现键盘↓键可以下移效果

Posted 2022-06-03 王睿丶

frameworks/base/core/java/android/view/ViewRootImpl.java

private boolean performFocusNavigation(KeyEvent event) 
 switch (event.getKeyCode()) 
                case KeyEvent.KEYCODE_DPAD_LEFT:
                    if (event.hasNoModifiers()) 
                        direction = View.FOCUS_LEFT;
                    
                    break;
                case KeyEvent.KEYCODE_DPAD_RIGHT:
                    if (event.hasNoModifiers()) 
                        direction = View.FOCUS_RIGHT;
                    
                    break;
                case KeyEvent.KEYCODE_DPAD_UP:
                    if (event.hasNoModifiers()) 
                        direction = View.FOCUS_UP;
                    
                    break;
+                case KeyEvent.KEYCODE_DPAD_DOWN:
+                    //wangrui For Settings.apk, let the ↓ key have the function of selecting the first-level directory. In other cases, the ↓ key will be performed in the default way.
+                    if (!("com.android.settings".equals(cn.getPackageName())))
+                        if (event.hasNoModifiers()) 
+                            direction = View.FOCUS_DOWN;
+                        
+                        break;
+                    
                case KeyEvent.KEYCODE_TAB:
                    if (event.hasNoModifiers()) 
                        direction = View.FOCUS_FORWARD;
                     else if (event.hasModifiers(KeyEvent.META_SHIFT_ON)) 
                        direction = View.FOCUS_BACKWARD;
                    
                    break;
            

我是王睿丶，加入我的Q群：901440630，欢迎一起讨论安卓技术！

开发者涨薪指南 48位大咖的思考法则、工作方式、逻辑体系