Dock changes:Docking station intents

Docking station intents for dock switch driver. Add DockObserver and updated Intent.java and systemserver.jave Signed-off-by: Dan Murphy <D.Murphy@motorola.com> modified: core/java/android/content/Intent.java new file: services/java/com/android/server/DockObserver.java modified: services/java/com/android/server/SystemServer.java Docking station updates Add constants for the dock Signed-off-by: Dan Murphy <D.Murphy@motorola.com> Signed-off-by: Mike Lockwood <lockwood@android.com>
2009-08-12 15:15:43 -05:00
parent 56e7ba2928
commit c9f4eaf438
3 changed files with 163 additions and 0 deletions
--- a/services/java/com/android/server/DockObserver.java
+++ b/services/java/com/android/server/DockObserver.java
@@ -0,0 +1,115 @@
+/*
+ * Copyright (C) 2008 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.server;
+
+import android.app.ActivityManagerNative;
+import android.content.Context;
+import android.content.Intent;
+import android.os.Handler;
+import android.os.Message;
+import android.os.UEventObserver;
+import android.util.Log;
+
+import java.io.FileReader;
+import java.io.FileNotFoundException;
+
+/**
+ * <p>DockObserver monitors for a docking station.
+ */
+class DockObserver extends UEventObserver {
+    private static final String TAG = DockObserver.class.getSimpleName();
+    private static final boolean LOG = false;
+
+    private static final String DOCK_UEVENT_MATCH = "DEVPATH=/devices/virtual/switch/dock";
+    private static final String DOCK_STATE_PATH = "/sys/class/switch/dock/state";
+
+    private int mDockState;
+    private boolean mPendingIntent;
+
+    private final Context mContext;
+
+    public DockObserver(Context context) {
+        mContext = context;
+
+        startObserving(DOCK_UEVENT_MATCH);
+
+        init();  // set initial status
+    }
+
+    @Override
+    public void onUEvent(UEventObserver.UEvent event) {
+        if (Log.isLoggable(TAG, Log.VERBOSE)) {
+            Log.v(TAG, "Dock UEVENT: " + event.toString());
+        }
+
+        try {
+            update(Integer.parseInt(event.get("SWITCH_STATE")));
+        } catch (NumberFormatException e) {
+            Log.e(TAG, "Could not parse switch state from event " + event);
+        }
+    }
+
+    private synchronized final void init() {
+        char[] buffer = new char[1024];
+
+        int newState = mDockState;
+        try {
+            FileReader file = new FileReader(DOCK_STATE_PATH);
+            int len = file.read(buffer, 0, 1024);
+            newState = Integer.valueOf((new String(buffer, 0, len)).trim());
+
+        } catch (FileNotFoundException e) {
+            Log.w(TAG, "This kernel does not have dock station support");
+        } catch (Exception e) {
+            Log.e(TAG, "" , e);
+        }
+
+        update(newState);
+    }
+
+    private synchronized final void update(int newState) {
+        if (newState != mDockState) {
+            mDockState = newState;
+
+            mPendingIntent = true;
+            mHandler.sendEmptyMessage(0);
+        }
+    }
+
+    private synchronized final void sendIntent() {
+        // Pack up the values and broadcast them to everyone
+        Intent intent = new Intent(Intent.ACTION_DOCK_EVENT);
+        intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
+        intent.putExtra(Intent.EXTRA_DOCK_STATE, mDockState);
+
+        // TODO: Should we require a permission?
+        if (Log.isLoggable(TAG, Log.VERBOSE)) {
+            Log.v(TAG, "Broadcasting dock state " + mDockState);
+        }
+        ActivityManagerNative.broadcastStickyIntent(intent, null);
+    }
+
+    private final Handler mHandler = new Handler() {
+        @Override
+        public void handleMessage(Message msg) {
+            if (mPendingIntent) {
+                sendIntent();
+                mPendingIntent = false;
+            }
+        }
+    };
+}