124 lines
4.6 KiB
Java
124 lines
4.6 KiB
Java
/*
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* Copyright (C) 2008 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.android.server;
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import android.app.ActivityManagerNative;
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import android.content.Context;
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import android.content.Intent;
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import android.os.UEventObserver;
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import android.util.Log;
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import android.media.AudioManager;
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import java.io.FileReader;
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import java.io.FileNotFoundException;
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/**
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* <p>HeadsetObserver monitors for a wired headset.
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*/
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class HeadsetObserver extends UEventObserver {
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private static final String TAG = HeadsetObserver.class.getSimpleName();
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private static final String HEADSET_UEVENT_MATCH = "DEVPATH=/class/switch/h2w";
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private static final String HEADSET_STATE_PATH = "/sys/class/switch/h2w/state";
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private static final String HEADSET_NAME_PATH = "/sys/class/switch/h2w/name";
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private Context mContext;
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private int mHeadsetState;
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private String mHeadsetName;
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public HeadsetObserver(Context context) {
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mContext = context;
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startObserving(HEADSET_UEVENT_MATCH);
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init(); // set initial status
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}
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@Override
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public void onUEvent(UEventObserver.UEvent event) {
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Log.v(TAG, "Headset UEVENT: " + event.toString());
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try {
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update(event.get("SWITCH_NAME"), Integer.parseInt(event.get("SWITCH_STATE")));
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} catch (NumberFormatException e) {
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Log.e(TAG, "Could not parse switch state from event " + event);
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}
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}
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private final void init() {
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char[] buffer = new char[1024];
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String newName = mHeadsetName;
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int newState = mHeadsetState;
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try {
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FileReader file = new FileReader(HEADSET_STATE_PATH);
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int len = file.read(buffer, 0, 1024);
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newState = Integer.valueOf((new String(buffer, 0, len)).trim());
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file = new FileReader(HEADSET_NAME_PATH);
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len = file.read(buffer, 0, 1024);
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newName = new String(buffer, 0, len).trim();
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} catch (FileNotFoundException e) {
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Log.w(TAG, "This kernel does not have wired headset support");
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} catch (Exception e) {
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Log.e(TAG, "" , e);
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}
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update(newName, newState);
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}
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private synchronized final void update(String newName, int newState) {
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if (newName != mHeadsetName || newState != mHeadsetState) {
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mHeadsetName = newName;
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mHeadsetState = newState;
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AudioManager audioManager = (AudioManager) mContext.getSystemService(Context.AUDIO_SERVICE);
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if (mHeadsetState == 1) {
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audioManager.setRouting(AudioManager.MODE_NORMAL, AudioManager.ROUTE_HEADSET,
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AudioManager.ROUTE_ALL);
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audioManager.setRouting(AudioManager.MODE_RINGTONE,
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AudioManager.ROUTE_HEADSET | AudioManager.ROUTE_SPEAKER,
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AudioManager.ROUTE_ALL);
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audioManager.setRouting(AudioManager.MODE_IN_CALL, AudioManager.ROUTE_HEADSET,
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AudioManager.ROUTE_ALL);
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} else {
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audioManager.setRouting(AudioManager.MODE_NORMAL, AudioManager.ROUTE_SPEAKER,
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AudioManager.ROUTE_ALL);
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audioManager.setRouting(AudioManager.MODE_RINGTONE, AudioManager.ROUTE_SPEAKER,
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AudioManager.ROUTE_ALL);
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audioManager.setRouting(AudioManager.MODE_IN_CALL, AudioManager.ROUTE_EARPIECE,
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AudioManager.ROUTE_ALL);
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}
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sendIntent();
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}
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}
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private synchronized final void sendIntent() {
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// Pack up the values and broadcast them to everyone
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Intent intent = new Intent(Intent.ACTION_HEADSET_PLUG);
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intent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY);
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intent.putExtra("state", mHeadsetState);
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intent.putExtra("name", mHeadsetName);
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// TODO: Should we require a permission?
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ActivityManagerNative.broadcastStickyIntent(intent, null);
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}
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}
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