Android example source code file (SensorService.java)

This example Android source code file (SensorService.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Android by Example" ^TM.

Java - Android tags/keywords

android, arraylist, bundle, debug, ibatterystats, io, listener, os, override, printer, printwriterprinter, remoteexception, sensor_disable, sensorservice, string, suppresswarnings, tag, util, utilities, utils

The SensorService.java Android example source code

/*
 * 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.content.Context;
import android.hardware.ISensorService;
import android.os.Binder;
import android.os.Bundle;
import android.os.RemoteException;
import android.os.IBinder;
import android.util.Config;
import android.util.Slog;
import android.util.PrintWriterPrinter;
import android.util.Printer;

import java.io.FileDescriptor;
import java.io.PrintWriter;
import java.util.ArrayList;

import com.android.internal.app.IBatteryStats;
import com.android.server.am.BatteryStatsService;


/**
 * Class that manages the device's sensors. It register clients and activate
 * the needed sensors. The sensor events themselves are not broadcasted from
 * this service, instead, a file descriptor is provided to each client they
 * can read events from.
 */

class SensorService extends ISensorService.Stub {
    static final String TAG = SensorService.class.getSimpleName();
    private static final boolean DEBUG = false;
    private static final boolean localLOGV = DEBUG ? Config.LOGD : Config.LOGV;
    private static final int SENSOR_DISABLE = -1;
    private int mCurrentDelay = 0;
    
    /**
     * Battery statistics to be updated when sensors are enabled and disabled.
     */
    final IBatteryStats mBatteryStats = BatteryStatsService.getService();

    private final class Listener implements IBinder.DeathRecipient {
        final IBinder mToken;
        final int mUid;

        int mSensors = 0;
        int mDelay = 0x7FFFFFFF;
        
        Listener(IBinder token, int uid) {
            mToken = token;
            mUid = uid;
        }
        
        void addSensor(int sensor, int delay) {
            mSensors |= (1<();

    private static native int _sensors_control_init();
    private static native Bundle _sensors_control_open();
    private static native int _sensors_control_close();
    private static native boolean _sensors_control_activate(int sensor, boolean activate);
    private static native int _sensors_control_set_delay(int ms);
    private static native int _sensors_control_wake();
}