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软件平台：Android11

硬件平台：QCS6125

    需求来源：用户通过系统异常崩溃，进入原生Settings页面，通过默认的多击版本号方式打开开发者模式，继而打开adb调试开关，安装三方apk。

   对付这种需求本来有多种方案，比如通过PKMS里边加一些签名或者包名校验，防止三方apk后装，之前的博客里有记录过该方法，本篇只针对settings打开开发者模式的方式做复杂化处理，因为这个入口如果完全屏蔽对开发者可能不太友好。

    改动如下：

diff --git a/src/com/android/settings/core/BasePreferenceController.java b/src/com/android/settings/core/BasePreferenceController.java
index c90fe48bc9..0e92930fcc 100644
--- a/src/com/android/settings/core/BasePreferenceController.java
+++ b/src/com/android/settings/core/BasePreferenceController.java
@@ -126,6 +126,8 @@ public abstract class BasePreferenceController extends AbstractPreferenceControlprivate UserHandle mWorkProfileUser;private int mMetricsCategory;+     public static boolean isCombinationKey = false;
+/*** Instantiate a controller as specified controller type and user-defined key.* <p/>
diff --git a/src/com/android/settings/deviceinfo/BuildNumberPreferenceController.java b/src/com/android/settings/deviceinfo/BuildNumberPreferenceController.java
index 185c8eaca7..db091b2b83 100644
--- a/src/com/android/settings/deviceinfo/BuildNumberPreferenceController.java
+++ b/src/com/android/settings/deviceinfo/BuildNumberPreferenceController.java
@@ -184,7 +184,7 @@ public class BuildNumberPreferenceController extends BasePreferenceController imR.plurals.show_dev_countdown, mDevHitCountdown,mDevHitCountdown),Toast.LENGTH_SHORT);
-                mDevHitToast.show();
+                //mDevHitToast.show();}mMetricsFeatureProvider.action(
@@ -199,7 +199,7 @@ public class BuildNumberPreferenceController extends BasePreferenceController im}mDevHitToast = Toast.makeText(mContext, R.string.show_dev_already,Toast.LENGTH_LONG);
-            mDevHitToast.show();
+            //mDevHitToast.show();mMetricsFeatureProvider.action(mMetricsFeatureProvider.getAttribution(mActivity),MetricsEvent.FIELD_SETTINGS_BUILD_NUMBER_DEVELOPER_MODE_ENABLED,
@@ -230,14 +230,16 @@ public class BuildNumberPreferenceController extends BasePreferenceController im* Enables development settings. Only call this after confirming password.*/private void enableDevelopmentSettings() {
-        mDevHitCountdown = 0;
-        mProcessingLastDevHit = false;
-        DevelopmentSettingsEnabler.setDevelopmentSettingsEnabled(mContext, true);
-        if (mDevHitToast != null) {
-            mDevHitToast.cancel();
-        }
-        mDevHitToast = Toast.makeText(mContext, R.string.show_dev_on,
+        if(isCombinationKey) {
+            mDevHitCountdown = 0;
+            mProcessingLastDevHit = false;
+            DevelopmentSettingsEnabler.setDevelopmentSettingsEnabled(mContext, true);
+            if (mDevHitToast != null) {
+                mDevHitToast.cancel();
+            }
+            mDevHitToast = Toast.makeText(mContext, R.string.show_dev_on,Toast.LENGTH_LONG);
-        mDevHitToast.show();
+            //mDevHitToast.show();
+        }}}
diff --git a/src/com/android/settings/deviceinfo/imei/ImeiInfoPreferenceController.java b/src/com/android/settings/deviceinfo/imei/ImeiInfoPreferenceController.java
index caee987bd6..33478c3327 100755
--- a/src/com/android/settings/deviceinfo/imei/ImeiInfoPreferenceController.java
+++ b/src/com/android/settings/deviceinfo/imei/ImeiInfoPreferenceController.java
@@ -19,6 +19,7 @@ package com.android.settings.deviceinfo.imei;import static android.telephony.TelephonyManager.PHONE_TYPE_CDMA;import android.content.Context;
+import android.os.Handler;import android.os.UserManager;import android.telephony.SubscriptionInfo;import android.telephony.SubscriptionManager;
@@ -46,6 +47,7 @@ public class ImeiInfoPreferenceController extends BasePreferenceController {private final TelephonyManager mTelephonyManager;private final List<Preference> mPreferenceList = new ArrayList<>();private Fragment mFragment;
+    private int mDevCount = 0;public ImeiInfoPreferenceController(Context context, String key) {super(context, key);
@@ -165,6 +167,15 @@ public class ImeiInfoPreferenceController extends BasePreferenceController {return true;}+        mDevCount++;
+        if (mDevCount == 10) {
+            isCombinationKey = true;
+            mDevCount = 0;
+            new Handler().postDelayed((Runnable) () -> {
+                isCombinationKey = false;
+            }, 30000);
+        }
+ImeiInfoDialogFragment.show(mFragment, simSlot, preference.getTitle().toString());return true;}

    这个改动设置一个标志位，在30s内点击相关栏10次才会设置，30s后次数自动清零重新累计，在该标志位设定后，原有的开发者模式多击才会生效，这里只是讲一个方法，具体哪个栏目可以灵活控制。