date : 2019 - 12 - 06
email: panzh8266@163.com
github: https://github.com/Jess-Pan
Android Q 系统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 系统
- 安装有com.android.location.provider.jar
2. 功能实现
2.1 大致集成步骤
- 在android框架中集成百度定位(配置frameworks/base/core/res/res/values/config.xml)
- 将
networklocation-xxx-releasee-xxx-signed.apk
和libnlocSDK7d.so
编入out/.../product/app
下 - 使用
BaiduNLPTestTool-debug.apk
进行系统网络定位测试
2.2 具体集成代码
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 集成百度系统定位apk
客制化文件夹路径
- 将百度提供的
networklocation-xxx-releasee-xxx-signed.apk
和/so/libs/...
下对应系统内核架构的so库放在客制化文件夹下 - 创建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)
-
在系统主make中将该目录包含进去
PRODUCT_PACKAGES += NetworkLocationxxx
2.3 整编系统,测试相关功能
3. 具体分析
使用jadx工具对networklocation-xxx-releasee-xxx-signed.apk进行反编译后进行分析
3.1 有关隐藏桌面图标的问题
- 反编译后得到的清单文件
<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>
清单文件中没有android.intent.action.MAIN
和android.intent.category.LAUNCHER
这两个action,意味着程序只接受Intent启动,不会显示桌面图标(如果使用adb install
进行安装会显示默认图标)
3.2 有关应用权限和签名的问题
3.2.1 应用权限
- 百度将apk分为有弹窗授权类和无弹窗授权类两种,沟通时针对项目选择,选择不同的apk版本
- 应Google要求,厂商应用不再编入/system/app下,统一编入/product/app下
3.2.2 应用签名
- 使用apk本身的签名
3.3 有关系统定位广播和输出log的问题
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 系统有关定位信息调用关系
应用调用LocationManagerService
应用调用系统定位服务需要获取LocationManager来选择定位方式(网络定位、GPS定位、WIFI定位)
LocationManager locationManager = (LocationManager)getSystemService(LOCATION_SERVICE);
// NETWORK_PROVIDER, 使用网络定位
// 45000, 定位时间间隔,单位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();
// 包装一个监听器
ListenerTransport transport = wrapListener(listener, looper);
try {
// 实则调用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
在这个接口中,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);
那么该aidl的具体实现是放在了LocationManagerService中
frameworks/base/services/core/java/com/android/server/LocationManagerService.java
首先可以看到LocationManagerService
的构造函数
public LocationManagerService(Context context) {
super();
mContext = context;
mHandler = FgThread.getHandler();
mLocationUsageLogger = new LocationUsageLogger();
// 找到默认的系统服务提供者
PackageManagerInternal packageManagerInternal = LocalServices.getService(
PackageManagerInternal.class);
// 这里指定了xml中配置好的百度Nlp系统定位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));
// 大多数启动推迟到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
通过包名来绑定、解绑服务
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,系统应用可以通过调用ILocationManager.aidl中的方法,通过LocationManagerService进行定位。
LocationManagerService 调用 NLP
应用申明一个LocationManager 调用 ILocationManager中的方法,这个方法的具体实现放在了LocationManagerService中。LocationManagerService通过调用ILocationProvider.aidl来获取NLP的查询后的结果,而NLP实现的接口则为LocationProviderBase.java
frameworks/base/location/lib/java/com/android/location/provider/LocationProviderBase.java
在系统中打开定位
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);
}
}
}
查询位置
protected abstract void onSetRequest(ProviderRequestUnbundled request, WorkSource source);
5. 测试要求
网络定位需要提前连接Wi-Fi或打开移动网络
- 使用
BaiduNLPTestTool-debug.apk
进行测试 - 使用内置应用进行测试(浏览器、相机等)
- 使用三方应用进行测试(百度地图、高德地图、QQ、微信、抖音等)