Android Settings 取消全选效果改为直接选中选项

Posted 2021-12-29 王睿丶

思路：
当获取到上下键值时，判断当前界面如果是设置主界面，就让它不执行全选代码

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

if (direction!=33 || (direction == 33 && (!"com.android.settings.homepage.SettingsHomepageActivity".equals(cn.getClassName()))))

 private boolean performFocusNavigation(KeyEvent event) 
            if (direction != 0) 
                View focused = mView.findFocus();
                if (focused != null) 
                    View v = focused.focusSearch(direction);
                    if (v != null && v != focused) 
                        // do the math the get the interesting rect
                        // of previous focused into the coord system of
                        // newly focused view
                        focused.getFocusedRect(mTempRect);
                        if (mView instanceof ViewGroup) 
                            ((ViewGroup) mView).offsetDescendantRectToMyCoords(
                                    focused, mTempRect);
                            ((ViewGroup) mView).offsetRectIntoDescendantCoords(
                                    v, mTempRect);
                        
+                        //wangrui On the home page of the settings, cancel the selection and select the first level directory instead
+                         am = (android.app.ActivityManager) mContext.getSystemService(ACTIVITY_SERVICE);
+                         cn = am.getRunningTasks(1).get(0).topActivity;
+                        if (direction!=33 || (direction == 33 && (!"com.android.settings.homepage.SettingsHomepageActivity".equals(cn.getClassName())))) 
+                            if (v.requestFocus(direction, mTempRect)) 
+                                playSoundEffect(SoundEffectConstants
+                                        .getContantForFocusDirection(direction));
+                                return true;
+                            
+                        

                    
        

Settings 开发系列：
Android Settings 去除振动功能
Android Settings 去除自动旋转屏幕
Android Settings 使设置主界面可以被键盘上下键所选中
Android Settings 取消全选效果改为直接选中选项