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Android.bp 文件中引入aar、jar、so库正确编译方法(值得收藏)_android_library_import

作者：2023面试高手 | 2024-03-12 03:30:26

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android_library_import

 

 

引入 aar

在模块源码根文件下新建文件夹 libs，复制要引入的 arr文件至此，新建 Android.bp

新增如下语句,这里以 lottie.arr 为例

  1. android_library_import {
  2.     name: "lib-lottie",
  3.     aars: ["lottie-2.8.0.aar"],
  4.     sdk_version: "current",
  5. }

然后在模块目录下 Android.bp 文件中的 android_app {} 中 static_libs 引入 “lib-lottie”,

  1. android_app {
  2.     name: "LiveTv",
  3.  
  4.     srcs: ["src/**/*.java"],
  5.  
  6. 	static_libs: [
  7. 		"lib-lottie",
  8.         "android-support-annotations",
  9.         "android-support-compat",
  10.         "android-support-core-ui",
  11.         "androidx.tvprovider_tvprovider",
  12.         "android-support-v4",
  13. 		....

这样编译就ok了，如果编译报错，

Error: Compilation can’t be completed because some library classes are missing.

Compilation failed

可以尝试将 “lib-lottie”, 移动到 libs: [] 中再次尝试

如果aar中带资源文件，需要将aar解压拷贝资源文件，不然编译时会提示找不到资源，运行时会报错

解压 lottie-2.8.0.aar，在模块源码根文件夹下新建 res-lottie 文件夹，将资源文件拷贝到此目录

模块目录下 Android.bp 文件中的 resource_dirs: [] 引入

  1. android_app {
  2.     name: "LiveTv",
  3.  
  4.     srcs: ["src/**/*.java"],
  5. 	
  6.  	resource_dirs: [
  7.         "res",
  8.         "res_ext",
  9.         "res-lottie",
  10.     ],
  11.  
  12. 	static_libs: [
  13. 		"lib-lottie",
  14.         "android-support-annotations",
  15.         "android-support-compat",
  16.         "android-support-core-ui",
  17.         "androidx.tvprovider_tvprovider",
  18.         "android-support-v4",
  19. 		....
  20. 	],
  21.  
  22. 	aaptflags: [
  23.         "--extra-packages",
  24.         "com.airbnb.lottie",
  25.     ],
  26.

同时增加 aar 对应的包名 aaptflags，以便生成对应包名 R 文件

aaptflags --extra-packages com.airbnb.lottie, 编译时会生成 com.airbnb.lottie.R

多个aar增按照如上操作配置多个即可

引入 jar

在模块源码根文件下新建文件夹 libs，复制要引入的 jar 包至此，新建 Android.bp

新增如下语句,这里以 opencv.jar 为例

  1. java_import {
  2.     name: "face-opencv-jar",
  3.     jars: ["opencv.jar"],
  4.     sdk_version: "current",
  5. }

然后在模块目录下 Android.bp 文件中的 android_app {} 中 libs 引入 “face-opencv-jar”,

  1. android_app {
  2.     name: "LiveTv",
  3.  
  4.     libs: [
  5.         "telephony-common",
  6.         "mediatek-framework",
  7.         "ims-common",
  8. 		"face-opencv-jar",
  9.     ],
  10.

这样编译就ok了, jar包相对简单一些

引入 so

在模块源码根文件下新建文件夹 armeabi，复制要引入的 so 至此，在libs中新建 Android.bp

新增如下语句,这里以 libjniopencv_face.so 为例, arm 和 arm64 分别对应32/64的so库,针对源码环境

位数都是确定的，所以我们就写成一样了

  1. cc_prebuilt_library_shared {
  2.     name: "libjniopencv_face",
  3.     arch: {
  4.         arm: {
  5.             srcs: ["armeabi/libjniopencv_face.so"],
  6.         },
  7.         arm64: {
  8.             srcs: ["armeabi/libjniopencv_face.so"],
  9.         },
  10.     },
  11. }

然后在模块目录下 Android.bp 文件中的 android_app {} 中 jni_libs 引入 “libjniopencv_face”,

  1. android_app {
  2.     name: "LiveTv",
  3.  
  4.      jni_libs: [
  5.         "libjniopencv_face",
  6. 	]
  7.  
  8. ]
  9.

一个完整的包含 aar/jar/so Android.bp

libs

  1. ----Android.bp
  2. ----lottie-2.8.0.aar
  3. ----face-opencv-jar
  4. ----armeabi
  5. 	-----libjniopencv_face.so
  6. 	-----libopencv_text.so

libs/Android.bp

  1. android_library_import {
  2.     name: "lib-lottie",
  3.     aars: ["lottie-2.8.0.aar"],
  4.     sdk_version: "current",
  5. }
  6.  
  7. java_import {
  8.     name: "face-opencv-jar",
  9.     jars: ["opencv.jar"],
  10.     sdk_version: "current",
  11. }
  12.  
  13. cc_prebuilt_library_shared {
  14.     name: "libjniopencv_face",
  15.     arch: {
  16.         arm: {
  17.             srcs: ["armeabi/libjniopencv_face.so"],
  18.         },
  19.         arm64: {
  20.             srcs: ["armeabi/libjniopencv_face.so"],
  21.         },
  22.     },
  23. }
  24.  
  25. cc_prebuilt_library_shared {
  26.     name: "libopencv_text",
  27.     arch: {
  28.         arm: {
  29.             srcs: ["armeabi/libopencv_text.so"],
  30.         },
  31.         arm64: {
  32.             srcs: ["armeabi/libopencv_text.so"],
  33.         },
  34.     },
  35. }
  36.

模块根路径Android.bp

  1.  
  2. android_app {
  3.     name: "LiveTv",
  4.  
  5.     srcs: ["src/**/*.java"],
  6.  
  7.     // TODO(b/122608868) turn proguard back on
  8.     optimize: {
  9.         enabled: false,
  10.     },
  11.  
  12.     // It is required for com.android.providers.tv.permission.ALL_EPG_DATA
  13.     privileged: true,
  14.  
  15.     sdk_version: "system_current",
  16.     min_sdk_version: "23", // M
  17.  
  18.     resource_dirs: [
  19.         "res",
  20.         "material_res",
  21. 		"res-lottie",
  22.  
  23.     ],
  24.  
  25.     libs: [
  26. 		"face-opencv-jar",
  27. 	],
  28.  
  29.     static_libs: [
  30.         "android-support-compat",
  31.         "android-support-core-ui",
  32.         "androidx.tvprovider_tvprovider",
  33.         "android-support-v4",
  34.         "android-support-v7-appcompat",
  35.         "android-support-v7-palette",
  36.         "android-support-v7-preference",
  37.         "android-support-v7-recyclerview",
  38.         "android-support-v14-preference",
  39.         "android-support-v17-leanback",
  40.         "android-support-v17-preference-leanback",
  41.         "lib-lottie",
  42.     ],
  43.  
  44. 	 jni_libs: [
  45.         "libjniopencv_face",
  46.  		"libopencv_text",
  47. 	]
  48.  
  49.     javacflags: [
  50.         "-Xlint:deprecation",
  51.         "-Xlint:unchecked",
  52.     ],
  53.  
  54.     aaptflags: [
  55.         "--version-name",
  56.         version_name,
  57.  
  58.         "--version-code",
  59.         version_code,
  60.  
  61.         "--extra-packages",
  62.         "com.android.tv.tuner",
  63.  
  64.         "--extra-packages",
  65.         "com.airbnb.lottie",
  66.     ],
  67. }
  68.

小技巧

一般需要引入的so库都会是几十个，每一个都需要在Android.bp配置对应的 cc_prebuilt_library_shared

挨个复制会很浪费时间，自信观察格式都是固定的，我们可以通过遍历文件夹来生成这个json串

将所有 so 库文件拷贝至 sdcard/Android/armeabi/,遍历读取文件名，按默认格式写入txt文件即可

  1. private void getSoJson() {
  2.         String fileAbsolutePath = Environment.getExternalStorageDirectory().getPath() + "/Android/armeabi/";
  3.         Log.e("eee", "fileAbsolutePath ： " + fileAbsolutePath);
  4.         File file = new File(fileAbsolutePath);
  5.         File[] subFile = file.listFiles();
  6.         String json = "";
  7.         String soName = "";
  8.  
  9.         for (int iFileLength = 0; iFileLength < subFile.length; iFileLength++) {
  10.             if (!subFile[iFileLength].isDirectory()) {
  11.                 String filename = subFile[iFileLength].getName();
  12.                 String name = filename.split("\\.")[0];
  13.                 Log.e("eee", "filename ： " + filename + "  name=" + name);
  14.  
  15.                 json += "cc_prebuilt_library_shared {\n" +
  16.                         "    name: \"" + name + "\",\n" +
  17.                         "    arch: {\n" +
  18.                         "        arm: {\n" +
  19.                         "            srcs: [\"armeabi/" + filename + "\"],\n" +
  20.                         "        },\n" +
  21.                         "        arm64: {\n" +
  22.                         "            srcs: [\"armeabi/" + filename + "\"],\n" +
  23.                         "        },\n" +
  24.                         "    },\n" +
  25.                         "}" + "\r\n";
  26.  
  27.                 soName += "\""+name+"\"," + "\r\n";
  28.             }
  29.         }
  30.  
  31.         Log.e("eee", "soJson =" + json);
  32.         write2File("so.txt", json);
  33.         write2File("libs.txt", soName);
  34.     }
  35.  
  36.     private void write2File(String fileName, String data) {
  37.         String strFilePath = Environment.getExternalStorageDirectory().getPath() + "/Android/" + fileName;
  38.         String strContent = data + "\r\n";
  39.         try {
  40.             File sfile = new File(strFilePath);
  41.             if (!sfile.exists()) {
  42.                 Log.d("TestFile", "Create the file:" + strFilePath);
  43.                 sfile.getParentFile().mkdirs();
  44.                 sfile.createNewFile();
  45.             }
  46.             RandomAccessFile raf = new RandomAccessFile(sfile, "rwd");
  47.             raf.seek(sfile.length());
  48.             raf.write(strContent.getBytes());
  49.             raf.close();
  50.         } catch (Exception e) {
  51.             Log.e("TestFile", "Error on write File:" + e);
  52.         }
  53.     }

Android.mk语法规范

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