Android 添加自定义BOOT_COMPLETED广播避免延迟

Android 有自己的开机广播：

    /**
     * Broadcast Action: This is broadcast once, after the system has finished
     * booting.  It can be used to perform application-specific initialization,
     * such as installing alarms.  You must hold the
     * {@link android.Manifest.permission#RECEIVE_BOOT_COMPLETED} permission
     * in order to receive this broadcast.
     *
     * 
This is a protected intent that can only be sent
     * by the system.
     */
    @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION)
    public static final String ACTION_BOOT_COMPLETED = "android.intent.action.BOOT_COMPLETED";

但是在接触的一台设备上，这个广播在进入Launcher之后45秒才收到。明显慢了很多。

通过节点去控制设备的开光状态，节点在关机重启时会被重置为默认状态，这就意味着45s之后才能给节点设为用户上次的设置的值。在这之前的一些数据会丢失或错误计算。

所以只能添加一个自定义的开机广播，当系统启动完成即刻发出。但是要注意的是，此时并非真正意义上的“BOOT_COMPLETED”，也就是说系统的一些状态还没有初始化成功，比如IMEI号，此时去获取的话返回的是null，但是启动服务去执行自己的操作还是可以的。

添加方法：

diff --git a/kitkat/frameworks/base/services/java/com/android/server/SystemServer.java b/kitkat/frameworks/base/services/java/com/andr
index b61b9f3..eac817b 100644
--- a/kitkat/frameworks/base/services/java/com/android/server/SystemServer.java
+++ b/kitkat/frameworks/base/services/java/com/android/server/SystemServer.java
@@ -983,6 +983,7 @@ class ServerThread {
                 if (!headless) {
                     startSystemUi(contextF);
                     //startSimStateChangeService(contextF);
+                   sendCustomBootCompleted(contextF);
                 }
                 try {
                     if (mountServiceF != null) mountServiceF.systemReady();
@@ -1146,6 +1147,18 @@ class ServerThread {
         Slog.d("SimStateChange", "Starting service: " + intent);
         context.startServiceAsUser(intent, UserHandle.OWNER);
     }
+
+       static final void sendCustomBootCompleted(Context context){
+               try {
+                       Intent intent = new Intent();
+                       intent.setAction("test.intent.action.BOOT_COMPLETED");
+                       context.sendBroadcast(intent);
+                       System.out.println("send custom broadcast");
+               } catch (Exception e) {
+                       e.printStackTrace();
+                       System.out.println("Unable to send custom broadcast");
+               }
+       }
 }

Okay，大功告成。