android源码分析之类Build

2024年1月1日 217次阅读 来源: Android源码分析

Build类包含了许多手机信息，如手机设备名，芯片名，制程商的名字，model，android软件版本，SDK，fingerprint等等重要信息。

一个关于Build的Demo

import android.os.Build;


private void init() {
    // TODO Auto-generated method stub
    Log.i(TAG, "Build.ID:"+Build.ID);
    Log.i(TAG, "Build.DISPLAY:"+Build.DISPLAY);
    Log.i(TAG, "Build.PRODUCT:"+Build.PRODUCT);
    Log.i(TAG, "Build.DEVICE:"+Build.DEVICE);
    Log.i(TAG, "Build.BOARD:"+Build.BOARD);
    Log.i(TAG, "Build.MANUFACTURER:"+Build.MANUFACTURER);
    Log.i(TAG, "Build.BRAND:"+Build.BRAND);
    Log.i(TAG, "Build.MODEL:"+Build.MODEL);
    Log.i(TAG, "Build.BOOTLOADER:"+Build.BOOTLOADER);
    Log.i(TAG, "Build.HARDWARE:"+Build.HARDWARE);
    Log.i(TAG, "Build.SERIAL:"+Build.SERIAL);
    //Log.i(TAG, "Build.SUPPORTED_ABIS:"+Build.SUPPORTED_ABIS);
    //Log.i(TAG, "Build.SUPPORTED_32_BIT_ABIS:"+Build.SUPPORTED_32_BIT_ABIS);
    //Log.i(TAG, "Build.SUPPORTED_64_BIT_ABIS:"+Build.SUPPORTED_64_BIT_ABIS);
    Log.i(TAG, "Build.VERSION.INCREMENTAL:"+Build.VERSION.INCREMENTAL);
    Log.i(TAG, "Build.VERSION.RELEASE:"+Build.VERSION.RELEASE);
    Log.i(TAG, "Build.VERSION.SDK:"+Build.VERSION.SDK);
    Log.i(TAG, "Build.VERSION.SDK_INT:"+Build.VERSION.SDK_INT);
    Log.i(TAG, "Build.VERSION.CODENAME:"+Build.VERSION.CODENAME);
    Log.i(TAG, "Build.TYPE:"+Build.TYPE);
    Log.i(TAG, "Build.TAGS:"+Build.TAGS);
    Log.i(TAG, "Build.FINGERPRINT:"+Build.FINGERPRINT);
    Log.i(TAG, "Build.TIME:"+Build.TIME);
    Log.i(TAG, "Build.USER:"+Build.USER);
    Log.i(TAG, "Build.HOST:"+Build.HOST);
    //Log.i(TAG, "Build.IS_DEBUGGABLE:"+Build.IS_DEBUGGABLE);
}

Log信息如下：

11-27 08:02:22.975: I/MainActivity(13256): Build.ID:LRX22G
11-27 08:02:22.975: I/MainActivity(13256): Build.DISPLAY:LRX22G release-keys
11-27 08:02:22.975: I/MainActivity(13256): Build.PRODUCT:l9010_cla
11-27 08:02:22.975: I/MainActivity(13256): Build.DEVICE:l9010_cla
11-27 08:02:22.975: I/MainActivity(13256): Build.BOARD:msm8916
11-27 08:02:22.975: I/MainActivity(13256): Build.MANUFACTURER:Lanix
11-27 08:02:22.975: I/MainActivity(13256): Build.BRAND:qcom
11-27 08:02:22.975: I/MainActivity(13256): Build.MODEL:Ilium L950
11-27 08:02:22.976: I/MainActivity(13256): Build.BOOTLOADER:unknown
11-27 08:02:22.976: I/MainActivity(13256): Build.HARDWARE:qcom
11-27 08:02:22.976: I/MainActivity(13256): Build.SERIAL:1ca7811b
11-27 08:02:22.976: I/MainActivity(13256): Build.VERSION.INCREMENTAL:eng.android.20151126
11-27 08:02:22.976: I/MainActivity(13256): Build.VERSION.RELEASE:5.0.2
11-27 08:02:22.976: I/MainActivity(13256): Build.VERSION.SDK:21
11-27 08:02:22.976: I/MainActivity(13256): Build.VERSION.SDK_INT:21
11-27 08:02:22.976: I/MainActivity(13256): Build.VERSION.CODENAME:REL
11-27 08:02:22.976: I/MainActivity(13256): Build.TYPE:user
11-27 08:02:22.976: I/MainActivity(13256): Build.TAGS:release-keys
11-27 08:02:22.976: I/MainActivity(13256): Build.FINGERPRINT:LANIX/Ilium_L950/Ilium_L950:5.0.2/LRX22G/eng.android.20150828:user/release-keys
11-27 08:02:22.976: I/MainActivity(13256): Build.TIME:1448503027000
11-27 08:02:22.976: I/MainActivity(13256): Build.USER:android
11-27 08:02:22.976: I/MainActivity(13256): Build.HOST:C208

Build源码分析

基本属性

我们打开Build源码(./frameworks/base/core/java/android/os/Build.java)，大概的看一下源码：

public class Build {
    private static final String TAG = "Build";

    /** Value used for when a build property is unknown. */
    public static final String UNKNOWN = "unknown";

    /** Either a changelist number, or a label like "M4-rc20". */
    public static final String ID = getString("ro.build.id");

    /** A build ID string meant for displaying to the user */
    public static final String DISPLAY = getString("ro.build.display.id");

    /** The name of the overall product. */
    public static final String PRODUCT = getString("ro.product.name");

    /** The name of the industrial design. */
    public static final String DEVICE = getString("ro.product.device");

    /** The name of the underlying board, like "goldfish". */
    public static final String BOARD = getString("ro.product.board");

.............

Build类中主要是一些成员属性，这些属性看的眼熟不，对，如果你接触过手机的属性的话，那么你就会明白，这就是读取的手机属性值。

下面是我列的一个表格：

成员属性手机属性名手机属性值
IDro.build.idLRX22G
DISPLAYro.build.display.idLRX22G release-keys
PRODUCTro.product.namel9010_cla
DEVICEro.product.devicel9010_cla
BOARDro.product.boardmsm8916
MANUFACTURERro.product.manufacturerLanix
BRANDro.product.brandqcom
MODELro.product.modelIlium L950
BOOTLOADERro.bootloaderunknown
HARDWAREro.hardwareqcom
SERIALro.serialno1ca7811b
SUPPORTED_ABISro.product.cpu.abilistarmeabi-v7a,armeabi
SUPPORTED_32_BIT_ABISro.product.cpu.abilist32armeabi-v7a,armeabi
SUPPORTED_64_BIT_ABISro.product.cpu.abilist64
INCREMENTALro.build.version.incrementaleng.android.20151126
RELEASEro.build.version.release5.0.2
SDKro.build.version.sdk21
SDK_INTro.build.version.sdk21
CODENAMEro.build.version.codenameREL
TYPEro.build.typeuser
TAGSro.build.tagsrelease-keys
FINGERPRINTro.build.fingerprintLANIX/Ilium_L950/Ilium_L950:5.0.2/LRX22G/eng.android.20150828:user/release-keys
TIMEro.build.date.utc1448503027
USERro.build.userandroid
HOSTro.build.hostC208
IS_DEBUGGABLEro.debuggable1

关于版本的成员属性

VERSION_CODES:
        /** * October 2008: The original, first, version of Android. Yay! */
        public static final int BASE = 1;

        /** * February 2009: First Android update, officially called 1.1. */
        public static final int BASE_1_1 = 2;

        /** * May 2009: Android 1.5. */
        public static final int CUPCAKE = 3;

        /** * September 2009: Android 1.6. */
        public static final int DONUT = 4;

     ........................
     ........................

        /** * Android 4.4W: KitKat for watches, snacks on the run. */
        public static final int KITKAT_WATCH = 20;

        /** * Temporary until we completely switch to {@link #LOLLIPOP}. * @hide */
        public static final int L = 21;

        /** * Lollipop. A flat one with beautiful shadows. But still tasty. */
        public static final int LOLLIPOP = 21;

下面这个列表是关于软件版本号的表格：

VERSION_CODES：

成员属性软件版本号APK值
BASE1.01
BASE_1_11.12
CUPCAKE1.53
DONUT1.64
ECLAIR2.05
EECLAIR_0_12.0.16
ECLAIR_MR12.17
FROYO2.28
GINGERBREAD2.39
GINGERBREAD_MR12.3.310
HONEYCOMB3.011
HONEYCOMB_MR13.112
HONEYCOMB_MR23.213
ICE_CREAM_SANDWICH4.014
ICE_CREAM_SANDWICH_MR14.0.315
JELLY_BEAN4.116
JELLY_BEAN_MR14.217
JELLY_BEAN_MR24.318
KITKAT4.419
KITKAT_WATCH4.4W20
L5.021
LOLLIPOP5.021

关于fingerprint

先看代码：


private static String deriveFingerprint() {
        String finger = SystemProperties.get("ro.build.fingerprint");
        if (TextUtils.isEmpty(finger)) {
            finger = getString("ro.product.brand") + '/' +
                    getString("ro.product.name") + '/' +
                    getString("ro.product.device") + ':' +
                    getString("ro.build.version.release") + '/' +
                    getString("ro.build.id") + '/' +
                    getString("ro.build.version.incremental") + ':' +
                    getString("ro.build.type") + '/' +
                    getString("ro.build.tags");
        }
        return finger;
}

代码非常明白的告诉我们，fingerprint有二种方式获取，
一种是直接读取：ro.build.fingerprint，
如果读取的ro.build.fingerprint信息为空，那么我们会使用拼接的方式获取fingerprint:
拼接的方式如下：

ro.product.brand+ro.product.name+ro.product.device+ro.build.version.release+ro.build.id+ro.build.version.incremental+ro.build.type+ro.build.tags

拼接结果如下：

qcom+l9010_cla+l9010_cla+5.0.2+LRX22G+eng.android.20151126+user+release-keys

我们直接读取的如果：

LANIX/Ilium_L950/Ilium_L950:5.0.2/LRX22G/eng.android.20150828:user/release-keys

如果，这二种方式得到的fingerprint不一致，在GMS认证时CTS测试会有一个fingerprint的测试fail项，我们只要对应此拼接的方式来修改对应的属性值，就可以把此Fail项解决。

    原文作者：Android源码分析
    原文地址: https://blog.csdn.net/hfreeman2008/article/details/50100211
    本文转自网络文章，转载此文章仅为分享知识，如有侵权，请联系博主进行删除。
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