android11.0上通过广播屏蔽电源键功能

/framework/base/services/core/java/com/android/server/policy/PhoneWindowManager.java

 import java.util.HashSet;
 import java.util.List;

+//xyx:
+import android.os.SystemProperties;
+//xyx
+
 /**
  * WindowManagerPolicy implementation for the Android phone UI.  This
  * introduces a new method suffix, Lp, for an internal lock of the
@@ -1129,6 +1133,13 @@ public class PhoneWindowManager implements WindowManagerPolicy {
     }

     private void powerPress(long eventTime, boolean interactive, int count) {
+               //add by xyx to control powerPress
+               boolean enable = SystemProperties.getBoolean("persist.sys.enablepower", true);
+               Log.d("xyx", "powerPress enable = " + enable);
+        if (!enable) {
+            return;
+        }
+               //end xyx
         if (mDefaultDisplayPolicy.isScreenOnEarly() && !mDefaultDisplayPolicy.isScreenOnFully()) {
             Slog.i(TAG, "Suppressed redundant power key press while "
                     + "already in the process of turning the screen on.");
@@ -1277,6 +1288,14 @@ public class PhoneWindowManager implements WindowManagerPolicy {
     }

     private void powerLongPress() {
+               //add by xyx to control powerLongPress
+        boolean enable = SystemProperties.getBoolean("persist.sys.enablepower", true);
+        Log.d("xyx", "powerLongPress enable = " + enable);
+        if (!enable) {
+            mPowerKeyHandled = true;   // in order to power key up no sleep
+            return;
+        }
+        //end xyx
         final int behavior = getResolvedLongPressOnPowerBehavior();
         switch (behavior) {
             case LONG_PRESS_POWER_NOTHING:
@@ -4645,6 +4664,13 @@ public class PhoneWindowManager implements WindowManagerPolicy {
     }

     private void wakeUpFromPowerKey(long eventTime) {
+               //add by xyx to control wakeUpFromPowerKey
+        boolean enable = SystemProperties.getBoolean("persist.sys.enablepower", true);
+        Log.d("xyx", "wakeUpFromPowerKey enable = " + enable);
+        if (!enable) {
+            return;
+        }
+        //end xyx
         wakeUp(eventTime, mAllowTheaterModeWakeFromPowerKey,
                 PowerManager.WAKE_REASON_POWER_BUTTON, "android.policy:POWER");
     }

powerPress、powerLongPress、wakeUpFromPowerKey分别对应：休眠，长按，唤醒三个场景

在这里直接return就可以达到屏蔽电源键功能的目的。

如果想要将短按和长按的控制逻辑分开，这里将powerLongPress的属性修改一下就可以了，后续广播的控制逻辑做一下改动即可。

按照上面改完PhoneWindowManager.java后，可以编译出来，然后通过adb来测试是否控制电源键成功：

由于SystemUI是系统级应用，且一开机便运行，因此在SystemUI里面添加静态广播。 

添加静态广播：

/framework/base/packages/SystemUI/AndroidManifast.xml

diff --git a/packages/SystemUI/AndroidManifest.xml b/packages/SystemUI/AndroidManifest.xml
index c8a902e..d597aed 100755
--- a/packages/SystemUI/AndroidManifest.xml
+++ b/packages/SystemUI/AndroidManifest.xml
@@ -346,6 +346,16 @@
                 <data android:scheme="package" />
             </intent-filter>
         </receiver>
+
+               <!-- add by xyx to control powerkey -->
+               <receiver android:name=".WiwoodPowerKeyReceiver"
+            android:enabled="true"
+                       android:exported="true">
+            <intent-filter>
+                <action android:name="action.wiwood.enable_powerkey" />
+            </intent-filter>
+        </receiver>
+               <!-- end xyx -->

         <service android:name=".ImageWallpaper"
                 android:permission="android.permission.BIND_WALLPAPER"

/framework/base/packages/SystemUI/src/com/android/systemui/WiwoodPowerKeyReceiver.java

diff --git a/packages/SystemUI/src/com/android/systemui/WiwoodPowerKeyReceiver.java b/packages/SystemUI/src/com/android/systemui/WiwoodPowerKeyReceiver.java
new file mode 100755
index 0000000..8e64b0b
--- /dev/null
+++ b/packages/SystemUI/src/com/android/systemui/WiwoodPowerKeyReceiver.java
@@ -0,0 +1,39 @@
+/*
+ * Copyright (C) 2017 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file
+ * except in compliance with the License. You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software distributed under the
+ * License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied. See the License for the specific language governing
+ * permissions and limitations under the License.
+ */
+
+package com.android.systemui;
+
+import android.content.BroadcastReceiver;
+import android.content.Context;
+import android.content.Intent;
+import android.util.Log;
+import android.os.SystemProperties;
+
+public class WiwoodPowerKeyReceiver extends BroadcastReceiver {
+       
+       private final String TAG = "WiwoodPowerKeyReceiver";
+
+    @Override
+    public void onReceive(Context context, Intent intent) {
+               
+               String isEnable = intent.getStringExtra("isEnable");
+               
+               Log.d(TAG, "Receive BroadCast:-----------------> action.wiwood.enable_powerkey : " + isEnable);
+               if (isEnable.equals("true")) {
+                       SystemProperties.set("persist.sys.enablepower", "1");
+               } else if (isEnable.equals("false")) {
+                       SystemProperties.set("persist.sys.enablepower", "0");
+               }
+    }
+}

静态广播添加完成之后，可以make SystemUI

将编译出来的SystemUI.apk push到对应路径下，然后reboot；

再通过adb的方式发送广播验证是否添加成功：

powerkey可用：adb shell am broadcast -n com.android.systemui/.WiwoodPowerKeyReceiver -a action.wiwood.enable_powerkey --es isEnable "true"

powerkey不可用：adb shell am broadcast -n com.android.systemui/.WiwoodPowerKeyReceiver -a action.wiwood.enable_powerkey --es isEnable "false"