Android Q 集成百度定位分析

date : 2019 - 12 - 06
email: panzh8266@163.com
github: https://github.com/Jess-Pan

Android Q 系統(tǒng)集成百度定位流程分析

1. 需求文件

  • 百度提供的文件
    • networklocation-xxx-releasee-xxx-signed.apk
    • libnlocSDK7d.so
    • BaiduNLPTestTool-debug.apk
  • Android 系統(tǒng)
    • 安裝有com.android.location.provider.jar

2. 功能實(shí)現(xiàn)

2.1 大致集成步驟

  1. 在android框架中集成百度定位（配置frameworks/base/core/res/res/values/config.xml）
  2. 將networklocation-xxx-releasee-xxx-signed.apk和libnlocSDK7d.so編入out/.../product/app下
  3. 使用BaiduNLPTestTool-debug.apk進(jìn)行系統(tǒng)網(wǎng)絡(luò)定位測(cè)試

2.2 具體集成代碼

2.2.1 配置android框架

frameworks/base/core/res/res/values/config.xml

<bool name="config_enableNetworkLocationOverlay" translatable="false">false</bool>
<bool name="config_enableFusedLocationOverlay" translatable="false">true</bool>
<string name="config_networkLocationProviderPackageName" translatable="false">com.baidu.map.location</string>

<bool name="config_enableGeocoderOverlay" translatable="false">true</bool>
<string-array name="config_locationProviderPackageNames" translatable="false">
    <!-- The standard AOSP fused location provider -->
    <item>com.android.location.fused</item>
    <item>com.baidu.map.location</item>>
</string-array>

2.2.2 集成百度系統(tǒng)定位apk

客制化文件夾路徑

  1. 將百度提供的networklocation-xxx-releasee-xxx-signed.apk和/so/libs/...下對(duì)應(yīng)系統(tǒng)內(nèi)核架構(gòu)的so庫(kù)放在客制化文件夾下
  2. 創(chuàng)建Android.mk文件
LOCAL_PATH := $(my-dir)
# armeabi-v7a
my_archs := arm64 armeabi arm
my_src_arch := $(call get-prebuilt-src-arch, $(my_archs))

include $(CLEAR_VARS)
LOCAL_MODULE := NetworkLocationxxx
LOCAL_MODULE_TAGS := optional
LOCAL_SRC_FILES := ./networklocation-xxx-release-xxx-signed.apk
LOCAL_CERTIFICATE := PRESIGNED
LOCAL_SDK_VERSION := current
LOCCAL_MODULE_PATH := $(PRODUCT_OUT)/product/app
LOCAL_MODULE_CLASS := APPS
LOCAL_MODULE_SUFFIX := $(COMMON_ANDROID_PACKAGE_SUFFIX)
LOCAL_PRODUCT_MODULE := true
$(warning log:$(my_src_arch))
LOCAL_PREBUILT_JNI_LIBS := libs/$(my_src_arch)/libnlocSDK7d.so
LOCAL_MODULE_TARGET_ARCH := $(my_src_arch)
include $(BUILD_PREBUILT)

  1. 在系統(tǒng)主make中將該目錄包含進(jìn)去

    PRODUCT_PACKAGES += NetworkLocationxxx

2.3 整編系統(tǒng)，測(cè)試相關(guān)功能

3. 具體分析

使用jadx工具對(duì)networklocation-xxx-releasee-xxx-signed.apk進(jìn)行反編譯后進(jìn)行分析

3.1 有關(guān)隱藏桌面圖標(biāo)的問(wèn)題

  • 反編譯后得到的清單文件
<application android:label="@string/app_name" android:allowClearUserData="false">
    <uses-library android:name="org.apache.http.legacy" android:required="false"/>
    <uses-library android:name="com.android.location.provider"/>
    <service android:name="com.baidu.map.location.BaiduNetworkLocationService" android:enabled="true" android:exported="false" android:visibleToInstantApps="true">
        <intent-filter>
            <action android:name="com.android.location.service.v3.NetworkLocationProvider"/>
            <action android:name="com.android.location.service.v2.NetworkLocationProvider"/>
            <action android:name="com.baidu.bms.location.BaiduNetworkLocationProvider"/>
            <action android:name="com.baidu.bms.location.BaiduGeocodeProvider"/>
            <action android:name="com.google.android.location.NetworkLocationProvider"/>
            <action android:name="com.android.location.service.FusedLocationProvider"/>
            <action android:name="com.qualcomm.services.location.xtwifi.XTWiFiLocationProvider"/>
            <action android:name="com.google.android.location.GeocodeProvider"/>
            <action android:name="com.android.location.service.NetworkLocationProvider"/>
            <action android:name="com.android.location.service.GeocodeProvider"/>
        </intent-filter>
        <meta-data android:name="serviceVersion" android:value="10"/>
    </service>
    <service android:name="com.baidu.location.f" android:permission="com.baidu.permision.BAIDU_LOCATION_SERVICE" android:enabled="true" android:visibleToInstantApps="true">
        <intent-filter>
            <action android:name="com.baidu.locationx.service"/>
        </intent-filter>
    </service>
    <activity android:theme="@style/Transparent" android:name="com.baidu.map.location.ConfirmAlertActivity1" android:excludeFromRecents="true" android:launchMode="singleTask" android:configChanges="mcc|mnc|touchscreen|keyboard|keyboardHidden|navigation|orientation|screenLayout|uiMode|fontScale"/>
    <receiver android:name="com.baidu.map.location.LocationModeChangeReceiver">
        <intent-filter>
            <action android:name="com.android.settings.location.MODE_CHANGING"/>
        </intent-filter>
    </receiver>
</application>

清單文件中沒(méi)有android.intent.action.MAIN 和android.intent.category.LAUNCHER 這兩個(gè)action，意味著程序只接受Intent啟動(dòng)，不會(huì)顯示桌面圖標(biāo)（如果使用adb install 進(jìn)行安裝會(huì)顯示默認(rèn)圖標(biāo)）

3.2 有關(guān)應(yīng)用權(quán)限和簽名的問(wèn)題

3.2.1 應(yīng)用權(quán)限

  • 百度將apk分為有彈窗授權(quán)類(lèi)和無(wú)彈窗授權(quán)類(lèi)兩種，溝通時(shí)針對(duì)項(xiàng)目選擇，選擇不同的apk版本
  • 應(yīng)Google要求，廠商應(yīng)用不再編入/system/app下，統(tǒng)一編入/product/app下

3.2.2 應(yīng)用簽名

  • 使用apk本身的簽名

3.3 有關(guān)系統(tǒng)定位廣播和輸出log的問(wèn)題

12-05 22:17:16.118631 30105 30739 I System.out: [OkHttp] sendRequest>>
12-05 22:17:16.118902 30105 30739 I System.out: [OkHttp] sendRequest<<

12-05 22:17:16.129574  1858  1858 I NLP     : Location result:[location successful by Baidu], reason:[network location] locType=161

12-05 22:17:22.559460  1858  1916 D NLPLOC  : start network locating ...false  false
12-05 22:17:22.589600  1858  1916 D NLP_STA : network locating ...false  false
12-05 22:17:22.610570   966   984 D LocationManagerService: incoming location from: network

4. Android 系統(tǒng)有關(guān)定位信息調(diào)用關(guān)系

應(yīng)用調(diào)用LocationManagerService

應(yīng)用調(diào)用系統(tǒng)定位服務(wù)需要獲取LocationManager來(lái)選擇定位方式（網(wǎng)絡(luò)定位、GPS定位、WIFI定位）

LocationManager locationManager = (LocationManager)getSystemService(LOCATION_SERVICE);
// NETWORK_PROVIDER, 使用網(wǎng)絡(luò)定位
// 45000, 定位時(shí)間間隔,單位ms
locationManager.requestLocationUpdates(Location.NETWORK_PROVIDER, 45000, 0, locationListioner);

frameworks/base/location/java/android/location/LocationManager.java

public static final String NETWORK_PROVIDER = "network";

    private void requestLocationUpdates(LocationRequest request, LocationListener listener,
            Looper looper, PendingIntent intent) {

        String packageName = mContext.getPackageName();

        // 包裝一個(gè)監(jiān)聽(tīng)器
        ListenerTransport transport = wrapListener(listener, looper);

        try {
            // 實(shí)則調(diào)用mService.requestLocationUpdate(... ...)
            mService.requestLocationUpdates(request, transport, intent, packageName);
       } catch (RemoteException e) {
           throw e.rethrowFromSystemServer();
       }
    }

private final ILocationManager mService;

frameworks/base/location/java/android/location/ILocationManager.aidl

在這個(gè)接口中，有很多眼熟的方法

void requestLocationUpdates(in LocationRequest request, in ILocationListener listener,
                            in PendingIntent intent, String packageName);
void removeUpdates(in ILocationListener listener, in PendingIntent intent, String packageName);

void requestGeofence(in LocationRequest request, in Geofence geofence,
                     in PendingIntent intent, String packageName);
void removeGeofence(in Geofence fence, in PendingIntent intent, String packageName);

Location getLastLocation(in LocationRequest request, String packageName);

那么該aidl的具體實(shí)現(xiàn)是放在了LocationManagerService中

frameworks/base/services/core/java/com/android/server/LocationManagerService.java

首先可以看到LocationManagerService的構(gòu)造函數(shù)

    public LocationManagerService(Context context) {
        super();
        mContext = context;
        mHandler = FgThread.getHandler();
        mLocationUsageLogger = new LocationUsageLogger();
        
        // 找到默認(rèn)的系統(tǒng)服務(wù)提供者
        PackageManagerInternal packageManagerInternal = LocalServices.getService(
                PackageManagerInternal.class);
        // 這里指定了xml中配置好的百度Nlp系統(tǒng)定位apk包名
        packageManagerInternal.setLocationPackagesProvider(
                userId -> mContext.getResources().getStringArray(
                        com.android.internal.R.array.config_locationProviderPackageNames));
        packageManagerInternal.setLocationExtraPackagesProvider(
                userId -> mContext.getResources().getStringArray(
                      com.android.internal.R.array.config_locationExtraPackageNames));
        // 大多數(shù)啟動(dòng)推遲到systemRunning()
    }

String[] pkgs = resources.getStringArray(
                com.android.internal.R.array.config_locationProviderPackageNames);
... ...
// bind to network provider
        LocationProvider networkProviderManager = new LocationProvider(NETWORK_PROVIDER, true);
        LocationProviderProxy networkProvider = LocationProviderProxy.createAndBind(
                mContext,
                networkProviderManager,
                NETWORK_LOCATION_SERVICE_ACTION,
                com.android.internal.R.bool.config_enableNetworkLocationOverlay,
                com.android.internal.R.string.config_networkLocationProviderPackageName,
                com.android.internal.R.array.config_locationProviderPackageNames);
        if (networkProvider != null) {
            mRealProviders.add(networkProviderManager);
            addProviderLocked(networkProviderManager);
            networkProviderManager.attachLocked(networkProvider);
        } else {
            Slog.w(TAG, "no network location provider found");
        }

frameworks/base/services/core/java/com/android/server/location/ActivityRecognitionProxy.java

    public static ActivityRecognitionProxy createAndBind(
            Context context,
            boolean activityRecognitionHardwareIsSupported,
            ActivityRecognitionHardware activityRecognitionHardware,
            int overlaySwitchResId,
            int defaultServicePackageNameResId,
            int initialPackageNameResId) {
        ActivityRecognitionProxy activityRecognitionProxy = new ActivityRecognitionProxy(
                context,
                activityRecognitionHardwareIsSupported,
                activityRecognitionHardware,
                overlaySwitchResId,
                defaultServicePackageNameResId,
                initialPackageNameResId);

        if (activityRecognitionProxy.mServiceWatcher.start()) {
            return activityRecognitionProxy;
        } else {
            return null;
        }
    }

frameworks/base/services/core/java/com/android/server/location/ServiceWatcher.java

通過(guò)包名來(lái)綁定、解綁服務(wù)

    private void bind(ComponentName component, int version, int userId) {
        Preconditions.checkState(Looper.myLooper() == mHandler.getLooper());

        Intent intent = new Intent(mAction);
        intent.setComponent(component);

        mBestComponent = component;
        mBestVersion = version;
        mBestUserId = userId;

        if (D) Log.d(mTag, "binding " + component + " (v" + version + ") (u" + userId + ")");
        mContext.bindServiceAsUser(intent, this,
                Context.BIND_AUTO_CREATE | Context.BIND_NOT_FOREGROUND | Context.BIND_NOT_VISIBLE,
                UserHandle.of(userId));
    }

    private void unbind() {
        Preconditions.checkState(Looper.myLooper() == mHandler.getLooper());

        if (mBestComponent != null) {
            if (D) Log.d(mTag, "unbinding " + mBestComponent);
            mContext.unbindService(this);
        }

        mBestComponent = null;
        mBestVersion = Integer.MIN_VALUE;
        mBestUserId = UserHandle.USER_NULL;
    }

由此，系統(tǒng)應(yīng)用可以通過(guò)調(diào)用ILocationManager.aidl中的方法，通過(guò)LocationManagerService進(jìn)行定位。

LocationManagerService 調(diào)用 NLP

應(yīng)用申明一個(gè)LocationManager 調(diào)用 ILocationManager中的方法，這個(gè)方法的具體實(shí)現(xiàn)放在了LocationManagerService中。LocationManagerService通過(guò)調(diào)用ILocationProvider.aidl來(lái)獲取NLP的查詢(xún)后的結(jié)果，而NLP實(shí)現(xiàn)的接口則為L(zhǎng)ocationProviderBase.java

frameworks/base/location/lib/java/com/android/location/provider/LocationProviderBase.java

在系統(tǒng)中打開(kāi)定位

public void setEnabled(boolean enabled) {
        synchronized (mBinder) {
            if (mEnabled == enabled) {
                return;
            }

            mEnabled = enabled;
        }

        ILocationProviderManager manager = mManager;
        if (manager != null) {
            try {
                manager.onSetEnabled(mEnabled);
            } catch (RemoteException | RuntimeException e) {
                Log.w(mTag, e);
            }
        }
    }

查詢(xún)位置

    protected abstract void onSetRequest(ProviderRequestUnbundled request, WorkSource source);

5. 測(cè)試要求

網(wǎng)絡(luò)定位需要提前連接Wi-Fi或打開(kāi)移動(dòng)網(wǎng)絡(luò)

  • 使用BaiduNLPTestTool-debug.apk進(jìn)行測(cè)試
  • 使用內(nèi)置應(yīng)用進(jìn)行測(cè)試（瀏覽器、相機(jī)等）
  • 使用三方應(yīng)用進(jìn)行測(cè)試（百度地圖、高德地圖、QQ、微信、抖音等）
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