am f7d0b013: Add TrafficStats class to SDK.
Merge commit 'f7d0b01387c10f93bf17981d45087810c80f0902' into eclair-mr2-plus-aosp * commit 'f7d0b01387c10f93bf17981d45087810c80f0902': Add TrafficStats class to SDK.
This commit is contained in:
Ken Shirriff
142
api/current.xml
142
api/current.xml
@@ -83994,6 +83994,148 @@
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>
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</method>
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</class>
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<class name="TrafficStats"
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extends="java.lang.Object"
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abstract="false"
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static="false"
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final="false"
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deprecated="not deprecated"
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visibility="public"
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>
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<constructor name="TrafficStats"
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type="android.net.TrafficStats"
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static="false"
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final="false"
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deprecated="not deprecated"
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visibility="public"
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>
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</constructor>
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<method name="getMobileRxBytes"
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return="long"
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abstract="false"
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native="false"
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synchronized="false"
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static="true"
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final="false"
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deprecated="not deprecated"
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visibility="public"
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>
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</method>
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<method name="getMobileRxPkts"
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return="long"
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abstract="false"
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native="false"
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synchronized="false"
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static="true"
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final="false"
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deprecated="not deprecated"
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visibility="public"
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>
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</method>
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<method name="getMobileTxBytes"
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return="long"
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abstract="false"
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native="false"
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synchronized="false"
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static="true"
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final="false"
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deprecated="not deprecated"
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visibility="public"
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>
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</method>
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<method name="getMobileTxPkts"
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return="long"
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abstract="false"
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native="false"
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synchronized="false"
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static="true"
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final="false"
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deprecated="not deprecated"
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visibility="public"
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>
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</method>
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<method name="getTotalRxBytes"
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return="long"
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abstract="false"
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native="false"
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synchronized="false"
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static="true"
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final="false"
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deprecated="not deprecated"
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visibility="public"
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>
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</method>
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<method name="getTotalRxPkts"
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return="long"
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abstract="false"
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native="false"
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synchronized="false"
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static="true"
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final="false"
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deprecated="not deprecated"
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visibility="public"
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>
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</method>
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<method name="getTotalTxBytes"
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return="long"
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abstract="false"
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native="false"
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synchronized="false"
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static="true"
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final="false"
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deprecated="not deprecated"
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visibility="public"
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>
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</method>
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<method name="getTotalTxPkts"
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return="long"
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abstract="false"
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native="false"
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synchronized="false"
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static="true"
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final="false"
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deprecated="not deprecated"
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visibility="public"
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>
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</method>
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<method name="getUidRxBytes"
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return="long"
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abstract="false"
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native="false"
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synchronized="false"
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static="true"
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final="false"
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deprecated="not deprecated"
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visibility="public"
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>
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<parameter name="uid" type="int">
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</parameter>
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</method>
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<method name="getUidTxBytes"
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return="long"
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abstract="false"
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native="false"
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synchronized="false"
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static="true"
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final="false"
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deprecated="not deprecated"
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visibility="public"
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>
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<parameter name="uid" type="int">
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</parameter>
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</method>
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<field name="UNSUPPORTED"
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type="int"
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transient="false"
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volatile="false"
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value="-1"
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static="true"
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final="true"
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deprecated="not deprecated"
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visibility="public"
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>
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</field>
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</class>
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<class name="Uri"
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extends="java.lang.Object"
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abstract="true"
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265
core/java/android/net/TrafficStats.java
Normal file
265
core/java/android/net/TrafficStats.java
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@@ -0,0 +1,265 @@
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/*
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* Copyright (C) 2007 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 android.net;
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import android.util.Log;
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import java.io.File;
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import java.io.RandomAccessFile;
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import java.io.IOException;
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/**
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* Class that provides network traffic statistics. These statistics include bytes transmitted and
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* received and network packets transmitted and received, over all interfaces, over the mobile
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* interface, and on a per-UID basis.
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* <p>
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* These statistics may not be available on all platforms. If the statistics are not supported
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* by this device, {@link #UNSUPPORTED} will be returned.
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*/
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public class TrafficStats {
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/**
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* The return value to indicate that the device does not support the statistic.
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*/
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public final static int UNSUPPORTED = -1;
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// Logging tag.
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private final static String TAG = "trafficstats";
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// We pre-create all the File objects so we don't spend a lot of
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// CPU at runtime converting from Java Strings to byte[] for the
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// kernel calls.
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private final static File[] MOBILE_TX_PACKETS = mobileFiles("tx_packets");
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private final static File[] MOBILE_RX_PACKETS = mobileFiles("rx_packets");
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private final static File[] MOBILE_TX_BYTES = mobileFiles("tx_bytes");
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private final static File[] MOBILE_RX_BYTES = mobileFiles("rx_bytes");
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private final static File SYS_CLASS_NET_DIR = new File("/sys/class/net");
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/**
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* Get the total number of packets transmitted through the mobile interface.
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*
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* @return number of packets. If the statistics are not supported by this device,
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* {@link #UNSUPPORTED} will be returned.
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*/
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public static long getMobileTxPkts() {
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return getMobileStat(MOBILE_TX_PACKETS);
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}
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/**
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* Get the total number of packets received through the mobile interface.
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*
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* @return number of packets. If the statistics are not supported by this device,
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* {@link #UNSUPPORTED} will be returned.
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*/
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public static long getMobileRxPkts() {
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return getMobileStat(MOBILE_RX_PACKETS);
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}
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/**
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* Get the total number of bytes transmitted through the mobile interface.
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*
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* @return number of bytes. If the statistics are not supported by this device,
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* {@link #UNSUPPORTED} will be returned.
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*/
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public static long getMobileTxBytes() {
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return getMobileStat(MOBILE_TX_BYTES);
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}
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/**
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* Get the total number of bytes received through the mobile interface.
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*
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* @return number of bytes. If the statistics are not supported by this device,
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* {@link #UNSUPPORTED} will be returned.
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*/
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public static long getMobileRxBytes() {
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return getMobileStat(MOBILE_RX_BYTES);
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}
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/**
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* Get the total number of packets sent through all network interfaces.
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*
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* @return the number of packets. If the statistics are not supported by this device,
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* {@link #UNSUPPORTED} will be returned.
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*/
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public static long getTotalTxPkts() {
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return getTotalStat("tx_packets");
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}
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/**
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* Get the total number of packets received through all network interfaces.
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*
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* @return number of packets. If the statistics are not supported by this device,
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* {@link #UNSUPPORTED} will be returned.
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*/
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public static long getTotalRxPkts() {
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return getTotalStat("rx_packets");
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}
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/**
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* Get the total number of bytes sent through all network interfaces.
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*
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* @return number of bytes. If the statistics are not supported by this device,
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* {@link #UNSUPPORTED} will be returned.
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*/
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public static long getTotalTxBytes() {
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return getTotalStat("tx_bytes");
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}
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/**
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* Get the total number of bytes received through all network interfaces.
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*
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* @return number of bytes. If the statistics are not supported by this device,
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* {@link #UNSUPPORTED} will be returned.
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*/
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public static long getTotalRxBytes() {
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return getTotalStat("rx_bytes");
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}
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/**
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* Get the number of bytes sent through the network for this UID.
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* The statistics are across all interfaces.
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*
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* {@see android.os.Process#myUid()}.
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*
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* @param uid The UID of the process to examine.
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* @return number of bytes. If the statistics are not supported by this device,
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* {@link #UNSUPPORTED} will be returned.
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*/
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public static long getUidTxBytes(int uid) {
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return getNumberFromFilePath("/proc/uid_stat/" + uid + "/tcp_snd");
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}
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/**
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* Get the number of bytes received through the network for this UID.
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* The statistics are across all interfaces.
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*
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* {@see android.os.Process#myUid()}.
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*
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* @param uid The UID of the process to examine.
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* @return number of bytes
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*/
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public static long getUidRxBytes(int uid) {
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return getNumberFromFilePath("/proc/uid_stat/" + uid + "/tcp_rcv");
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}
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/**
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* Returns the array of two possible File locations for a given
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* statistic.
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*/
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private static File[] mobileFiles(String whatStat) {
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// Note that we stat them at runtime to see which is
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// available, rather than here, to guard against the files
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// coming & going later as modules shut down (e.g. airplane
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// mode) and whatnot. The runtime stat() isn't expensive compared
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// to the previous charset conversion that happened before we
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// were reusing File instances.
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File[] files = new File[2];
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files[0] = new File("/sys/class/net/rmnet0/statistics/" + whatStat);
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files[1] = new File("/sys/class/net/ppp0/statistics/" + whatStat);
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return files;
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}
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private static long getTotalStat(String whatStat) {
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File netdir = new File("/sys/class/net");
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File[] nets = SYS_CLASS_NET_DIR.listFiles();
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if (nets == null) {
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return UNSUPPORTED;
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}
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long total = 0;
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StringBuffer strbuf = new StringBuffer();
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for (File net : nets) {
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strbuf.append(net.getPath()).append(File.separator).append("statistics")
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.append(File.separator).append(whatStat);
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total += getNumberFromFilePath(strbuf.toString());
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strbuf.setLength(0);
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}
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return total;
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}
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private static long getMobileStat(File[] files) {
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for (int i = 0; i < files.length; i++) {
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File file = files[i];
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if (!file.exists()) {
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continue;
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}
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try {
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RandomAccessFile raf = new RandomAccessFile(file, "r");
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return getNumberFromFile(raf, file.getAbsolutePath());
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} catch (IOException e) {
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Log.w(TAG,
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"Exception opening TCP statistics file " + file.getAbsolutePath(),
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e);
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}
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}
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return UNSUPPORTED;
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}
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// File will have format <number><newline>
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private static long getNumberFromFilePath(String filename) {
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RandomAccessFile raf = getFile(filename);
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if (raf == null) {
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return UNSUPPORTED;
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}
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return getNumberFromFile(raf, filename);
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}
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// Private buffer for getNumberFromFile. Safe for re-use because
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// getNumberFromFile is synchronized.
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private final static byte[] buf = new byte[16];
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private static synchronized long getNumberFromFile(RandomAccessFile raf, String filename) {
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try {
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raf.read(buf);
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raf.close();
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} catch (IOException e) {
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Log.w(TAG, "Exception getting TCP bytes from " + filename, e);
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return UNSUPPORTED;
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} finally {
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if (raf != null) {
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try {
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raf.close();
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} catch (IOException e) {
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Log.w(TAG, "Exception closing " + filename, e);
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}
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}
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}
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long num = 0L;
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for (int i = 0; i < buf.length; i++) {
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if (buf[i] < '0' || buf[i] > '9') {
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break;
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}
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num *= 10;
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num += buf[i] - '0';
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}
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return num;
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}
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private static RandomAccessFile getFile(String filename) {
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File f = new File(filename);
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if (!f.canRead()) {
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return null;
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}
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try {
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return new RandomAccessFile(f, "r");
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} catch (IOException e) {
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Log.w(TAG, "Exception opening TCP statistics file " + filename, e);
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return null;
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}
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}
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}
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Reference in New Issue
Block a user