android 新增一個廣播偵聽USB設備的插拔

太懶,直接上patch:
diff --git a/core/java/android/hardware/usb/UsbManager.java b/core/java/android/hardware/usb/UsbManager.javaindex 376a4de..be64369 100644--- a/core/java/android/hardware/usb/UsbManager.java+++ b/core/java/android/hardware/usb/UsbManager.java@@ -84,6 +84,21 @@ public class UsbManager {             "android.hardware.usb.action.USB_STATE";      /**+     * Broadcast Action: A broadcast for Vehice Cradle state changes.+     *+     * This is a sticky broadcast intent for clients that include Vehicle cradle state connected/dis+     connected state,+     * +     *  {@link #VEHICLE_CRADLE_CONNECTED} boolean indicating whether vehicle cradle is connected+     or disconnected.+     * 
+     *+     * @hide+     */+    public static final String ACTION_VEHICLE_CRADLE_STATE =+            "android.hardware.usb.action.VEHICLE_CRADLE_STATE";++    /**      * Broadcast Action: A broadcast for USB port changes.      *      * This intent is sent when a USB port is added, removed, or changes state.@@ -176,6 +191,14 @@ public class UsbManager {     public static final String USB_CONFIGURED = "configured";      /**+     * Boolean extra indicating whether vehicle cradle is connected or disconnected.+     * Used in extras for the {@link #ACTION_VEHICLE_CRADLE_STATE} broadcast.+     *+     * {@hide}+     */+    public static final String VEHICLE_CRADLE_CONNECTED = "connected";++    /**      * Boolean extra indicating whether confidential user data, such as photos, should be      * made available on the USB connection. This variable will only be set when the user      * has explicitly asked for this data to be unlocked.diff --git a/core/res/AndroidManifest.xml b/core/res/AndroidManifest.xmlindex 47f1994..1f6a787 100644--- a/core/res/AndroidManifest.xml+++ b/core/res/AndroidManifest.xml@@ -243,6 +243,7 @@               +               diff --git a/services/usb/java/com/android/server/usb/UsbHostManager.java b/services/usb/java/com/android/server/usb/UsbHostManager.javaindex c272c76..25033df 100644--- a/services/usb/java/com/android/server/usb/UsbHostManager.java+++ b/services/usb/java/com/android/server/usb/UsbHostManager.java@@ -81,6 +81,11 @@ public class UsbHostManager {     // contains all connected USB devices     private final HashMap mDevices = new HashMap<>(); +    private static final String HSUSB_STATE_MATCH =+                        "DEVPATH=/devices/soc/a800000.ssusb/a800000.dwc3/xhci-hcd.0.auto/usb1/1-1";+    /*current vehicle cradle state*/+    private boolean mConnected;+     private static final String HSUSB_MSR_MATCH =             "DEVPATH=/devices/soc/a800000.ssusb/a800000.dwc3/xhci-hcd.0.auto/usb1/1-1";     // current MSR connection state@@ -184,6 +189,10 @@ public class UsbHostManager {         mHostBlacklist = context.getResources().getStringArray(                 com.android.internal.R.array.config_usbHostBlacklist);         mUsbAlsaManager = alsaManager;+        if(ZebraUtils.isZebra()){+            // Watch for Host USB configuration changes+            mUsbUEventVehicleCradleObserver.startObserving(HSUSB_STATE_MATCH);+        }         mSettingsManager = settingsManager;         String deviceConnectionHandler = context.getResources().getString(                 com.android.internal.R.string.config_UsbDeviceConnectionHandling_component);@@ -485,6 +494,51 @@ public class UsbHostManager {             mMSRConnected = 0;  // reset flag         }     }++     /*+      * Listens for uevent messages from the kernel to monitor Vehicle Cradle state+      */+    private final UEventObserver mUsbUEventVehicleCradleObserver = new UEventObserver() {+        @Override+        public void onUEvent(UEventObserver.UEvent event) {+            if (DEBUG) Slog.v(TAG, "USB UEVENT: " + event.toString());++            String action = event.get("ACTION");+            String devtype = event.get("DEVTYPE");+            String product = event.get("PRODUCT");+            if (action != null && product!= null && devtype != null) {+                updateVehicleCradleState(action, devtype, product);+            }+        }+    };+    /*+     * update Vehicle Cradle state for+     * vendor id = 1d6b , product id = 0002 , bcddevice = 310+     */+    private void updateVehicleCradleState(String action, String devtype, String product) {++        if (("add".equals(action)) && ("usb_device".equals(devtype)) && ("1d6b/2/310".equals(product+        ))) {+            mConnected = true;+            updateVehicleCradleStateBroadcast();+        } else if (("remove".equals(action)) && ("usb_device".equals(devtype)) && ("1d6b/2/310".equals(product))) {+            mConnected = false;+            updateVehicleCradleStateBroadcast();+        }+    }+    /*+     * broadcast intent on vehicle cradle state change+     */+    private void updateVehicleCradleStateBroadcast() {+        // send a sticky broadcast containing current Vehicle Cradle state+        Intent intent = new Intent(UsbManager.ACTION_VEHICLE_CRADLE_STATE);+        intent.addFlags(Intent.FLAG_RECEIVER_REPLACE_PENDING+                | Intent.FLAG_RECEIVER_FOREGROUND);+        intent.putExtra(UsbManager.VEHICLE_CRADLE_CONNECTED, mConnected);+        Slog.i(TAG, "vehicle cradle broadcasting " + intent + " connected: " + mConnected);+        mContext.sendStickyBroadcastAsUser(intent, UserHandle.ALL);+    }+     /* Called from JNI in monitorUsbHostBus() to report new USB configuration for the device        currently being added.  Returns true if successful, false in case of error.      */
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