Add TrafficStats class to SDK.

>

</method>

</class>

<class name="TrafficStats"

 extends="java.lang.Object"

 abstract="false"

 static="false"

 final="false"

 deprecated="not deprecated"

 visibility="public"

>

<constructor name="TrafficStats"

 type="android.net.TrafficStats"

 static="false"

 final="false"

 deprecated="not deprecated"

 visibility="public"

>

</constructor>

<method name="getMobileRxBytes"

 return="long"

 abstract="false"

 native="false"

 synchronized="false"

 static="true"

 final="false"

 deprecated="not deprecated"

 visibility="public"

>

</method>

<method name="getMobileRxPkts"

 return="long"

 abstract="false"

 native="false"

 synchronized="false"

 static="true"

 final="false"

 deprecated="not deprecated"

 visibility="public"

>

</method>

<method name="getMobileTxBytes"

 return="long"

 abstract="false"

 native="false"

 synchronized="false"

 static="true"

 final="false"

 deprecated="not deprecated"

 visibility="public"

>

</method>

<method name="getMobileTxPkts"

 return="long"

 abstract="false"

 native="false"

 synchronized="false"

 static="true"

 final="false"

 deprecated="not deprecated"

 visibility="public"

>

</method>

<method name="getTotalRxBytes"

 return="long"

 abstract="false"

 native="false"

 synchronized="false"

 static="true"

 final="false"

 deprecated="not deprecated"

 visibility="public"

>

</method>

<method name="getTotalRxPkts"

 return="long"

 abstract="false"

 native="false"

 synchronized="false"

 static="true"

 final="false"

 deprecated="not deprecated"

 visibility="public"

>

</method>

<method name="getTotalTxBytes"

 return="long"

 abstract="false"

 native="false"

 synchronized="false"

 static="true"

 final="false"

 deprecated="not deprecated"

 visibility="public"

>

</method>

<method name="getTotalTxPkts"

 return="long"

 abstract="false"

 native="false"

 synchronized="false"

 static="true"

 final="false"

 deprecated="not deprecated"

 visibility="public"

>

</method>

<method name="getUidRxBytes"

 return="long"

 abstract="false"

 native="false"

 synchronized="false"

 static="true"

 final="false"

 deprecated="not deprecated"

 visibility="public"

>

<parameter name="uid" type="int">

</parameter>

</method>

<method name="getUidTxBytes"

 return="long"

 abstract="false"

 native="false"

 synchronized="false"

 static="true"

 final="false"

 deprecated="not deprecated"

 visibility="public"

>

<parameter name="uid" type="int">

</parameter>

</method>

<field name="UNSUPPORTED"

 type="int"

 transient="false"

 volatile="false"

 value="-1"

 static="true"

 final="true"

 deprecated="not deprecated"

 visibility="public"

>

</field>

</class>

<class name="Uri"

 extends="java.lang.Object"

 abstract="true"

/*

 * Copyright (C) 2007 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 android.net;

import android.util.Log;

import java.io.File;

import java.io.RandomAccessFile;

import java.io.IOException;

/**

 * Class that provides network traffic statistics.  These statistics include bytes transmitted and

 * received and network packets transmitted and received, over all interfaces, over the mobile

 * interface, and on a per-UID basis.

 * <p>

 * These statistics may not be available on all platforms.  If the statistics are not supported

 * by this device, {@link #UNSUPPORTED} will be returned.

 */

public class TrafficStats {

    /**

     * The return value to indicate that the device does not support the statistic.

     */

    public final static int UNSUPPORTED = -1;

    // Logging tag.

    private final static String TAG = "trafficstats";

    // We pre-create all the File objects so we don't spend a lot of

    // CPU at runtime converting from Java Strings to byte[] for the

    // kernel calls.

    private final static File[] MOBILE_TX_PACKETS = mobileFiles("tx_packets");

    private final static File[] MOBILE_RX_PACKETS = mobileFiles("rx_packets");

    private final static File[] MOBILE_TX_BYTES = mobileFiles("tx_bytes");

    private final static File[] MOBILE_RX_BYTES = mobileFiles("rx_bytes");

    private final static File SYS_CLASS_NET_DIR = new File("/sys/class/net");

    /**

     * Get the total number of packets transmitted through the mobile interface.

     *

     * @return number of packets.  If the statistics are not supported by this device,

     * {@link #UNSUPPORTED} will be returned.

     */

    public static long getMobileTxPkts() {

        return getMobileStat(MOBILE_TX_PACKETS);

    }

    /**

     * Get the total number of packets received through the mobile interface.

     *

     * @return number of packets.  If the statistics are not supported by this device,

     * {@link #UNSUPPORTED} will be returned.

     */

    public static long getMobileRxPkts() {

        return getMobileStat(MOBILE_RX_PACKETS);

    }

    /**

     * Get the total number of bytes transmitted through the mobile interface.

     *

     * @return number of bytes.  If the statistics are not supported by this device,

     * {@link #UNSUPPORTED} will be returned.

     */

      public static long getMobileTxBytes() {

          return getMobileStat(MOBILE_TX_BYTES);

      }

    /**

     * Get the total number of bytes received through the mobile interface.

     *

     * @return number of bytes.  If the statistics are not supported by this device,

     * {@link #UNSUPPORTED} will be returned.

     */

    public static long getMobileRxBytes() {

        return getMobileStat(MOBILE_RX_BYTES);

    }

    /**

     * Get the total number of packets sent through all network interfaces.

     *

     * @return the number of packets.  If the statistics are not supported by this device,

     * {@link #UNSUPPORTED} will be returned.

     */

    public static long getTotalTxPkts() {

        return getTotalStat("tx_packets");

    }

    /**

     * Get the total number of packets received through all network interfaces.

     *

     * @return number of packets.  If the statistics are not supported by this device,

     * {@link #UNSUPPORTED} will be returned.

     */

    public static long getTotalRxPkts() {

        return getTotalStat("rx_packets");

    }

    /**

     * Get the total number of bytes sent through all network interfaces.

     *

     * @return number of bytes.  If the statistics are not supported by this device,

     * {@link #UNSUPPORTED} will be returned.

     */

    public static long getTotalTxBytes() {

        return getTotalStat("tx_bytes");

    }

    /**

     * Get the total number of bytes received through all network interfaces.

     *

     * @return number of bytes.  If the statistics are not supported by this device,

     * {@link #UNSUPPORTED} will be returned.

     */

    public static long getTotalRxBytes() {

        return getTotalStat("rx_bytes");

    }

    /**

     * Get the number of bytes sent through the network for this UID.

     * The statistics are across all interfaces.

     *

     * {@see android.os.Process#myUid()}.

     *

     * @param uid The UID of the process to examine.

     * @return number of bytes.  If the statistics are not supported by this device,

     * {@link #UNSUPPORTED} will be returned.

     */

    public static long getUidTxBytes(int uid) {

        return getNumberFromFilePath("/proc/uid_stat/" + uid + "/tcp_snd");

    }

    /**

     * Get the number of bytes received through the network for this UID.

     * The statistics are across all interfaces.

     *

     * {@see android.os.Process#myUid()}.

     *

     * @param uid The UID of the process to examine.

     * @return number of bytes

     */

    public static long getUidRxBytes(int uid) {

        return getNumberFromFilePath("/proc/uid_stat/" + uid + "/tcp_rcv");

    }

    /**

     * Returns the array of two possible File locations for a given

     * statistic.

     */

    private static File[] mobileFiles(String whatStat) {

        // Note that we stat them at runtime to see which is

        // available, rather than here, to guard against the files

        // coming & going later as modules shut down (e.g. airplane

        // mode) and whatnot.  The runtime stat() isn't expensive compared

        // to the previous charset conversion that happened before we

        // were reusing File instances.

        File[] files = new File[2];

        files[0] = new File("/sys/class/net/rmnet0/statistics/" + whatStat);

        files[1] = new File("/sys/class/net/ppp0/statistics/" + whatStat);

        return files;

    }

    private static long getTotalStat(String whatStat) {

        File netdir = new File("/sys/class/net");

        File[] nets = SYS_CLASS_NET_DIR.listFiles();

        if (nets == null) {

            return UNSUPPORTED;

        }

        long total = 0;

        StringBuffer strbuf = new StringBuffer();

        for (File net : nets) {

            strbuf.append(net.getPath()).append(File.separator).append("statistics")

                    .append(File.separator).append(whatStat);

            total += getNumberFromFilePath(strbuf.toString());

            strbuf.setLength(0);

        }

        return total;

    }

    private static long getMobileStat(File[] files) {

        for (int i = 0; i < files.length; i++) {

            File file = files[i];

            if (!file.exists()) {

                continue;

            }

            try {

                RandomAccessFile raf = new RandomAccessFile(file, "r");

                return getNumberFromFile(raf, file.getAbsolutePath());

            } catch (IOException e) {

                Log.w(TAG,

                      "Exception opening TCP statistics file " + file.getAbsolutePath(),

                      e);

            }

        }

        return UNSUPPORTED;

    }

    // File will have format <number><newline>

    private static long getNumberFromFilePath(String filename) {

        RandomAccessFile raf = getFile(filename);

        if (raf == null) {

            return UNSUPPORTED;

        }

        return getNumberFromFile(raf, filename);

    }

    // Private buffer for getNumberFromFile.  Safe for re-use because

    // getNumberFromFile is synchronized.

    private final static byte[] buf = new byte[16];

    private static synchronized long getNumberFromFile(RandomAccessFile raf, String filename) {

        try {

            raf.read(buf);

            raf.close();

        } catch (IOException e) {

            Log.w(TAG, "Exception getting TCP bytes from " + filename, e);

            return UNSUPPORTED;

        } finally {

            if (raf != null) {

                try {

                    raf.close();

                } catch (IOException e) {

                    Log.w(TAG, "Exception closing " + filename, e);

                }

            }

        }

        long num = 0L;

        for (int i = 0; i < buf.length; i++) {

            if (buf[i] < '0' || buf[i] > '9') {

                break;

            }

            num *= 10;

            num += buf[i] - '0';

        }

        return num;

    }

    private static RandomAccessFile getFile(String filename) {

        File f = new File(filename);

        if (!f.canRead()) {

            return null;

        }

        try {

            return new RandomAccessFile(f, "r");

        } catch (IOException e) {

            Log.w(TAG, "Exception opening TCP statistics file " + filename, e);

            return null;

        }

    }

}