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冻结屏幕很多第一次听到以为是Android一种异常现象，实则不然，就是防止用户在做一些非法操作导致问题防止安全漏洞问题。

1、主要通过用户行为比如禁止下拉状态栏和按键以及onTouch事件拦截等，不知道请看这篇文章（Touch事件传递流程、事件分发中的onTouch 和onTouchEvent 有什么区别，又该如何使用？_事件分发中的ontouch和ontouchevent有什么区别,又该如何使用?-CSDN博客

主要修改代码

PhoneWindowManager # interceptKeyBeforeDispatching # interceptKeyBeforeQueueing # interceptMotionBeforeQueueingNonInteractive # 

ViewGroup #onInterceptTouchEvent 

StatusBar # onTouchEvent 

PhoneStatusBarView #  onTouchEvent

2308  freeze Screen           system_process                       E  set freezeScreen Status Success
2024-05-23 11:49:52.744  1331-4710  unfreeze Screen         system_process                       E  set isUnfreezeScreen Status Success=
2024-05-23 11:52:36.634  1331-2308  freeze Screen           system_process                       E  set freezeScreen Status Success

2、实现逻辑比较简单  代码如下图所示 通过系统属性persist.xxx.screen_frozen去控制 

ViewGroup.java

代码路径frameworks/base/core/java/android/view/ViewGroup.java 在onInterceptTouchEvent进行拦截

 public boolean onInterceptTouchEvent(MotionEvent ev) {boolean isFreezeScreen = SystemProperties.getBoolean("persist.xxx.screen_frozen", false);Log.e("ZM","onInterceptTouchEvent="+isFreezeScreen);if(isFreezeScreen == true){Log.e("ZM","onInterceptTouchEvent isFreezeScreen="+isFreezeScreen);return true;}if (ev.isFromSource(InputDevice.SOURCE_MOUSE)&& ev.getAction() == MotionEvent.ACTION_DOWN&& ev.isButtonPressed(MotionEvent.BUTTON_PRIMARY)&& isOnScrollbarThumb(ev.getX(), ev.getY())) {return true;}return false;}

3、/packages/SystemUI/src/com/android/systemui/statusbar/phone/PhoneStatusBarView.java

 # onTouchEvent设置为true表示拦截此事件 不再往下传递。

 

 @Overridepublic boolean onTouchEvent(MotionEvent event) {boolean isFreezeScreen = SystemProperties.getBoolean("persist.xxx.screen_frozen", false);Log.e("ZM","PhoneStatusBarView="+isFreezeScreen);if(isFreezeScreen == true){Log.e("ZM","onTouchEvent PhoneStatusBarView isFreezeScreen="+isFreezeScreen);return true;}if (mTouchEventHandler == null) {Log.w(TAG,String.format("onTouch: No touch handler provided; eating gesture at (%d,%d)",(int) event.getX(),(int) event.getY()));return true;}return mTouchEventHandler.handleTouchEvent(event);}

4、PhoneWindowManager里面拦截 按键KeyUp/KeyDown事件代码 

+         // 添加一个标志来控制是否启用锁定
+   // private boolean isScreenLocked = true;
+       //zm fix
+       private static final String SYS_PROP_SCREEN_FROZEN = "persist.xxx.screen_frozen";
+       
+       private boolean mScreenFrozen = false;/*** Keyguard stuff
@@ -2664,8 +2670,20 @@ public class PhoneWindowManager implements WindowManagerPolicy {@Overridepublic long interceptKeyBeforeDispatching(IBinder focusedToken, KeyEvent event,int policyFlags) {
+               mScreenFrozen = SystemProperties.getBoolean(SYS_PROP_SCREEN_FROZEN, false);final boolean keyguardOn = keyguardOn();final int keyCode = event.getKeyCode();
+               Log.e("ZM", "interceptKeyBeforeDispatching Block Home key2 mScreenFrozen="+mScreenFrozen);
+               if (mScreenFrozen) {
+                // 禁止所有按键输入
+                           Log.e("ZM", "free Screen interceptKeyBeforeDispatching Block Home key"+event.toString());
+               if (keyCode == KeyEvent.KEYCODE_BACK ||
+            keyCode == KeyEvent.KEYCODE_APP_SWITCH || keyCode == KeyEvent.KEYCODE_VOLUME_DOWN || keyCode == KeyEvent.KEYCODE_VOLUME
+                keyCode == KeyEvent.KEYCODE_POWER || keyCode == KeyEvent.KEYCODE_HOME) {
+                               Log.e("ZM", "free Screen interceptKeyBeforeDispatching Block Home key2===="+event.toString());
+                return -1; // Prevent the key event from being dispatched
+            }
+        }final int repeatCount = event.getRepeatCount();final int metaState = event.getMetaState();final int flags = event.getFlags();
@@ -3504,6 +3522,18 @@ public class PhoneWindowManager implements WindowManagerPolicy {/** {@inheritDoc} */@Overridepublic int interceptKeyBeforeQueueing(KeyEvent event, int policyFlags) {
+               mScreenFrozen = SystemProperties.getBoolean(SYS_PROP_SCREEN_FROZEN, false);
+               Log.e("ZM", "free Screen interceptKeyBeforeQueueing KeyEvent="+mScreenFrozen);
+               if (mScreenFrozen) {
+            // 禁止所有按键输入
+                       int keyCode = event.getKeyCode();
+                       if (keyCode == KeyEvent.KEYCODE_VOLUME_DOWN || keyCode == KeyEvent.KEYCODE_VOLUME_UP ||
+                keyCode == KeyEvent.KEYCODE_POWER || keyCode == KeyEvent.KEYCODE_HOME) {
+                               Log.e("ZM", "free Screen interceptKeyBeforeQueueing KeyEvent="+event.toString());
+                return 0;
+            }
+                       Log.e("ZM", "free Screen interceptKeyBeforeQueueing KeyEvent2="+event.toString());
+        }final int keyCode = event.getKeyCode();final boolean down = event.getAction() == KeyEvent.ACTION_DOWN;boolean isWakeKey = (policyFlags & WindowManagerPolicy.FLAG_WAKE) != 0
@@ -4092,6 +4122,11 @@ public class PhoneWindowManager implements WindowManagerPolicy {@Overridepublic int interceptMotionBeforeQueueingNonInteractive(int displayId, long whenNanos,int policyFlags) {
+                     if (mScreenFrozen) {
+                                 //zm fix
+                             Log.e("ZM","interceptMotionBeforeQueueingNonInteractive=====");
+                  return 0;
+              }

5、apk调用代码也比较简单示例如下

/*** 冻结屏幕*/public void freezeScreen() {SystemProperties.set("persist.xxx.screen_frozen", "true");Log.e("freeze Screen", "set freezeScreen Status Success");}/*** 屏幕是否冻结** @return*/public boolean isFreezeScreen() {// 获取系统属性 persist.xxx.screen_frozen 的值String value = SystemProperties.get("persist.sys.screen_frozen", "false");Log.e("isFreezeScreen","value="+value);// 将属性值转换为布尔值return Boolean.parseBoolean(value);}/*** 解冻屏幕*/public void unfreezeScreen() {SystemProperties.set("persist.xxx.screen_frozen", "false");Log.e("unfreeze Screen", "set isUnfreezeScreen Status Success=");}

最后别忘记记得把屏幕保持常亮哈，转载请注明出现高通 Android 12/13冻结屏幕-CSDN博客，谢谢！

最后补充：

// 设置屏幕常亮
       

 getWindow().addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON);

记得加系统签名哈

 android:sharedUserId="android.uid.system"