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为何要做这个

我要在framework的PhoneWindowManager.java里面调用LightService.java里面的函数，用来做灯光的提示之类的，为何我要在PhoneWindowManager.java里面加这个呢，这里就不做讨论了，但是直接调用哪些接口是不行的，所以就引进了ipc通信，所以就有了我这篇博客，这其中有个安卓的大神朋友帮我解惑了很多问题

Aidl 和ipc通信之类的我就不讲了，我永远都是实践家，而且我的专长是linux驱动，这个东西也是现在慢慢负责公司产品framework 需要做的才去学习的

Changes not staged for commit:  (use "git add 
   
    ..." to update what will be committed)  (use "git checkout -- 
    
     ..." to discard changes in working directory)    modified:   frameworks/base/Android.mk    modified:   frameworks/base/core/java/android/app/ContextImpl.java    modified:   frameworks/base/core/java/android/content/Context.java    modified:   frameworks/base/core/java/android/content/ContextWrapper.java    modified:   frameworks/base/policy/src/com/android/internal/policy/impl/PhoneWindowManager.java    modified:   frameworks/base/services/java/com/android/server/SystemServer.java    modified:   frameworks/base/test-runner/src/android/test/mock/MockContext.java    modified:   frameworks/base/tools/layoutlib/bridge/src/com/android/layoutlib/bridge/android/BridgeContext.java    modified:   kernel/mediatek/custom/out    modified:   mediatek/misc/ota_scatter.txtUntracked files:  (use "git add 
     
      ..." to include in what will be committed)    bootable/bootloader/lk/out    frameworks/base/core/java/android/content/pm/ILightManager.aidl    frameworks/base/core/java/android/content/pm/LightManager.java    frameworks/base/services/java/com/android/server/LightManagerService.java
     
    
   

第一步：加入aidl文件

frameworks/base/core/java/android/content/pm/ILightManager.aidl    frameworks/base/core/java/android/content/pm/LightManager.java //在app里面这个东西是自动生成的，但是这个这个是手动写出来的

第二步：加入service相关的文件还有

frameworks/base/services/java/com/android/server/LightManagerService.java

第三步：加入注册需要的一些代码

modified:   frameworks/base/Android.mk    modified:   frameworks/base/core/java/android/app/ContextImpl.java    modified:   frameworks/base/core/java/android/content/Context.java    modified:   frameworks/base/core/java/android/content/ContextWrapper.java    modified:   frameworks/base/policy/src/com/android/internal/policy/impl/PhoneWindowManager.java    modified:   frameworks/base/services/java/com/android/server/SystemServer.java    modified:   frameworks/base/test-runner/src/android/test/mock/MockContext.java    modified:   frameworks/base/tools/layoutlib/bridge/src/com/android/layoutlib/bridge/android/BridgeContext.java

第四步：在PhoneWindowManager.java加入调用代码

--- a/frameworks/base/policy/src/com/android/internal/policy/impl/PhoneWindowManager.java+++ b/frameworks/base/policy/src/com/android/internal/policy/impl/PhoneWindowManager.java@@ -37,6 +37,7 @@ import android.content.IntentFilter; import android.content.ServiceConnection; import android.content.pm.ApplicationInfo; import android.content.pm.ActivityInfo;+import android.content.pm.LightManager; import android.content.pm.PackageManager; import android.content.pm.ResolveInfo; import android.content.res.CompatibilityInfo;@@ -252,6 +253,7 @@ public class PhoneWindowManager implements WindowManagerPolicy {
        IWindowManager mWindowManager;     WindowManagerFuncs mWindowManagerFuncs;     PowerManager mPowerManager;+    //AlarmManagerService mAlarmManagerService;//weiqifa     IStatusBarService mStatusBarService;     boolean mPreloadedRecentApps;     final Object mServiceAquireLock = new Object();@@ -1019,8 +1021,6 @@ public class PhoneWindowManager implements WindowManagerPolicy {
            mPowerManager = (PowerManager)context.getSystemService(Context.POWER_SERVICE);-                               -         mBroadcastWakeLock = mPowerManager.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK,                 "PhoneWindowManager.mBroadcastWakeLock");         mEnableShiftMenuBugReports = "1".equals(SystemProperties.get("ro.debuggable"));@@ -2256,41 +2256,19 @@ public class PhoneWindowManager implements WindowManagerPolicy {
           }         if(keyCode == KeyEvent.KEYCODE_HDYRODENT)         {-            if(down)-            {+            if(down){+                LightManager a = mContext.getLightManager();+                a.addStudent("12312345678");+                Log.d(TAG,"--------------------------->mLightManager is null ");                 Log.d(TAG,"key mode m is pressed!!!!");                 Intent intent = new Intent("com.key.android.KEY_M_ACTION_DOWM");                 mContext.sendBroadcast(intent);-            }-            else-            {+            }else{                 Log.d(TAG,"key mode m is released!!!!");                 Intent intent = new Intent("com.key.android.KEY_M_ACTION_UP");                 mContext.sendBroadcast(intent);             }         }

第五步：查看日志

D/ADB_SERVICES(  222): read_data=8892W/LightManagerService(  597): --------------->testLightManagerService<---------------12312345678D/ADB_SERVICES(  222): max_read_time=0.000265 max_send_time=0.001093 W/LightManagerService(  597): <--------------->testLightManagerService<--------------->12312345678

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