{"id":1823,"date":"2023-03-28T22:40:28","date_gmt":"2023-03-28T14:40:28","guid":{"rendered":"https:\/\/www.appblog.cn\/?p=1823"},"modified":"2023-04-22T09:20:51","modified_gmt":"2023-04-22T01:20:51","slug":"transform-api-during-android-gradle-plugin-packaging-apk","status":"publish","type":"post","link":"https:\/\/www.appblog.cn\/index.php\/2023\/03\/28\/transform-api-during-android-gradle-plugin-packaging-apk\/","title":{"rendered":"Android Gradle Plugin\u6253\u5305Apk\u8fc7\u7a0b\u4e2d\u7684Transform API"},"content":{"rendered":"

Transform API<\/code>\u662f\u57281.5.0-beta1<\/code>\u7248\u5f00\u59cb\u4f7f\u7528\uff0c\u5229\u7528Transform API<\/code>\uff0c\u7b2c\u4e09\u65b9\u7684\u63d2\u4ef6\u53ef\u4ee5\u5728.class<\/code>\u6587\u4ef6\u8f6c\u4e3adex\u6587\u4ef6\u4e4b\u524d\uff0c\u5bf9\u4e00\u4e9b.class<\/code>\u6587\u4ef6\u8fdb\u884c\u5904\u7406\u3002Transform API<\/code>\u7b80\u5316\u4e86\u8fd9\u4e2a\u5904\u7406\u8fc7\u7a0b\uff0c\u800c\u4e14\u4f7f\u7528\u8d77\u6765\u5f88\u7075\u6d3b\u3002<\/p>\n

\u4f7f\u7528Transform API<\/h2>\n

<\/p>\n

\u4f7f\u7528Transform API<\/code>\u4e3b\u8981\u662f\u5199\u4e00\u4e2a\u7c7b\u7ee7\u627fTransform\uff0c\u5e76\u628a\u8be5Transform\u6ce8\u5165\u5230\u6253\u5305\u8fc7\u7a0b\u4e2d\u3002
\n\u6ce8\u5165Transform\u5f88\u7b80\u5355\uff0c\u5148\u83b7\u53d6com.android.build.gradle.AppExtension<\/code>\u5bf9\u8c61\uff0c\u7136\u540e\u8c03\u7528\u5b83\u7684registerTransform()<\/code>\u65b9\u6cd5\u3002
\n\u8fd9\u4e2a\u65b9\u6cd5\u5b9e\u9645\u4e0a\u662f\u5c5e\u4e8eBaseExtension<\/code>\u7684\uff0cAppExtension<\/code>\u7ee7\u627f\u81eaBaseExtension<\/code>\u3002<\/p>\n

#com.android.build.gradle.BaseExtension\npublic void registerTransform(@NonNull Transform transform, Object... dependencies) {\n    transforms.add(transform);\n    transformDependencies.add(Arrays.asList(dependencies));\n}<\/code><\/pre>\n
\u6ce8\u5165Transform\u5bf9\u8c61\uff1a<\/p>\n
AppExtension android = project.extensions.getByType(AppExtension)\nandroid.registerTransform(new AJXTransform(project))<\/code><\/pre>\n
AJXTransform\u662f\u81ea\u5b9a\u4e49\u7684Transform\u7c7b\uff1a<\/p>\n
lass AJXTransform extends Transform {\n    Project project\n    AJXTransform(Project project) {\n        this.project = project\n    }\n\n    @Override\n    String getName() {\n        return "ajx"\n    }\n\n    @Override\n    Set<QualifiedContent.ContentType> getInputTypes() {\n        \/\/\u8f93\u5165\u7c7b\u578b\uff0c\u53ef\u4ee5\u4f7fclass\u6587\u4ef6\uff0c\u4e5f\u53ef\u4ee5\u662f\u6e90\u7801\u6587\u4ef6\uff0c\u8fd9\u662f\u8868\u793a\u8f93\u5165\u7684class\u6587\u4ef6\n        return ImmutableSet.<QualifiedContent.ContentType> of(QualifiedContent.DefaultContentType.CLASSES)\n    }\n\n    @Override\n    Set<? super QualifiedContent.Scope> getScopes() {\n        \/\/\u4f5c\u7528\u8303\u56f4\n        return TransformManager.SCOPE_FULL_PROJECT\n    }\n\n    @Override\n    boolean isIncremental() {\n        \/\/\u662f\u5426\u652f\u6301\u589e\u91cf\u7f16\u8bd1\n        return false\n    }\n\n    @Override\n    void transform(TransformInvocation transformInvocation) throws TransformException, InterruptedException, IOException {\n        \/\/\u5728\u8fd9\u91cc\u5bf9\u8f93\u5165\u8f93\u51fa\u7684class\u8fdb\u884c\u5904\u7406\n    }\n}<\/code><\/pre>\n
\uff081\uff09ContentType<\/code>\u662f\u4e00\u4e2a\u63a5\u53e3\uff0c\u9ed8\u8ba4\u6709\u4e00\u4e2a\u679a\u4e3e\u7c7b\u578bDefaultContentType<\/code>\u5b9e\u73b0\u4e86ContentType<\/code>\uff0c\u5305\u542b\u6709CLASSES<\/code>\u548cRESOURCES<\/code>\u7c7b\u578b\u3002<\/p>\n
    \n
  • CLASSES<\/code>\u7c7b\u578b\u8868\u793a\u7684\u662f\u5728jar\u5305\u6216\u8005\u6587\u4ef6\u5939\u4e2d\u7684.class<\/code>\u6587\u4ef6<\/li>\n
  • RESOURCES<\/code>\u7c7b\u578b\u8868\u793a\u7684\u662f\u6807\u51c6\u7684Java\u6e90\u6587\u4ef6<\/li>\n<\/ul>\n
    \uff082\uff09Scope \u4f5c\u7528\u8303\u56f4<\/p>\n\n\n\n\n\n\n\n\n\n\n\n
    Scope\u7c7b\u578b<\/th>\n\u8bf4\u660e<\/th>\n<\/tr>\n<\/thead>\n
    PROJECT<\/code><\/td>\n\u53ea\u5904\u7406\u5f53\u524d\u7684\u9879\u76ee<\/td>\n<\/tr>\n
    SUB_PROJECTS<\/code><\/td>\n\u53ea\u5904\u7406\u5b50\u9879\u76ee<\/td>\n<\/tr>\n
    EXTERNAL_LIBRARIES<\/code><\/td>\n\u53ea\u5904\u7406\u5916\u90e8\u7684\u4f9d\u8d56\u5e93<\/td>\n<\/tr>\n
    TESTED_CODE<\/code><\/td>\n\u53ea\u5904\u7406\u6d4b\u8bd5\u4ee3\u7801<\/td>\n<\/tr>\n
    PROVIDED_ONLY<\/code><\/td>\n\u53ea\u5904\u7406provided-only\u7684\u4f9d\u8d56\u5e93<\/td>\n<\/tr>\n
    PROJECT_LOCAL_DEPS<\/code><\/td>\n\u53ea\u5904\u7406\u5f53\u524d\u9879\u76ee\u7684\u672c\u5730\u4f9d\u8d56\uff0c\u4f8b\u5982jar, aar\uff08\u8fc7\u671f\uff0c\u88abEXTERNAL_LIBRARIES\u66ff\u4ee3\uff09<\/td>\n<\/tr>\n
    SUB_PROJECTS_LOCAL_DEPS<\/code><\/td>\n\u53ea\u5904\u7406\u5b50\u9879\u76ee\u7684\u672c\u5730\u4f9d\u8d56\uff0c\u4f8b\u5982jar, aar\uff08\u8fc7\u671f\uff0c\u88abEXTERNAL_LIBRARIES\u66ff\u4ee3\uff09<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
    \uff083\uff09Transform\u4e2d\u7684getInputTypes()<\/code>\u65b9\u6cd5\u548cgetScopes()<\/code>\u65b9\u6cd5\u8fd4\u56de\u7684\u662fSet\u96c6\u5408\uff0c\u56e0\u6b64\u8fd9\u4e9b\u7c7b\u578b\u662f\u53ef\u4ee5\u8fdb\u884c\u7ec4\u5408\u7684\u3002\u5728com.android.build.gradle.internal.pipeline.TransformManager<\/code>\u4e2d\u5c31\u5305\u542b\u4e86\u591a\u79cdSet\u96c6\u5408\u3002<\/p>\n
    \/**\n * Manages the transforms for a variant.\n *\n * <p>The actual execution is handled by Gradle through the tasks.\n * Instead it's a means to more easily configure a series of transforms that consume each other's\n * inputs when several of these transform are optional.\n *\/\npublic class TransformManager extends FilterableStreamCollection {\n\n    private static final boolean DEBUG = true;\n\n    private static final String FD_TRANSFORMS = "transforms";\n\n    public static final Set<ScopeType> EMPTY_SCOPES = ImmutableSet.of();\n\n    public static final Set<ContentType> CONTENT_CLASS = ImmutableSet.of(CLASSES);\n    public static final Set<ContentType> CONTENT_JARS = ImmutableSet.of(CLASSES, RESOURCES);\n    public static final Set<ContentType> CONTENT_RESOURCES = ImmutableSet.of(RESOURCES);\n    public static final Set<ContentType> CONTENT_NATIVE_LIBS =\n            ImmutableSet.of(NATIVE_LIBS);\n    public static final Set<ContentType> CONTENT_DEX = ImmutableSet.of(ExtendedContentType.DEX);\n    public static final Set<ContentType> CONTENT_DEX_WITH_RESOURCES =\n            ImmutableSet.of(ExtendedContentType.DEX, RESOURCES);\n    public static final Set<ScopeType> PROJECT_ONLY = ImmutableSet.of(Scope.PROJECT);\n    public static final Set<ScopeType> SCOPE_FULL_PROJECT =\n            ImmutableSet.of(Scope.PROJECT, Scope.SUB_PROJECTS, Scope.EXTERNAL_LIBRARIES);\n    public static final Set<ScopeType> SCOPE_FULL_WITH_IR_FOR_DEXING =\n            new ImmutableSet.Builder<ScopeType>()\n                    .addAll(SCOPE_FULL_PROJECT)\n                    .add(InternalScope.MAIN_SPLIT)\n                    .build();\n    public static final Set<ScopeType> SCOPE_FULL_WITH_FEATURES =\n            new ImmutableSet.Builder<ScopeType>()\n                    .addAll(SCOPE_FULL_PROJECT)\n                    .add(InternalScope.FEATURES)\n                    .build();\n    public static final Set<ScopeType> SCOPE_FULL_WITH_IR_AND_FEATURES =\n            new ImmutableSet.Builder<ScopeType>()\n                    .addAll(SCOPE_FULL_PROJECT)\n                    .add(InternalScope.MAIN_SPLIT)\n                    .add(InternalScope.FEATURES)\n                    .build();\n    public static final Set<ScopeType> SCOPE_FEATURES = ImmutableSet.of(InternalScope.FEATURES);\n    public static final Set<ScopeType> SCOPE_FULL_LIBRARY_WITH_LOCAL_JARS =\n            ImmutableSet.of(Scope.PROJECT, InternalScope.LOCAL_DEPS);\n    public static final Set<ScopeType> SCOPE_FULL_PROJECT_WITH_LOCAL_JARS =\n            new ImmutableSet.Builder<ScopeType>()\n                    .addAll(SCOPE_FULL_PROJECT)\n                    .add(InternalScope.LOCAL_DEPS)\n                    .build();\n\n    @NonNull\n    private final Project project;\n    @NonNull private final EvalIssueReporter issueReporter;\n    @NonNull private final Logger logger;\n    @NonNull\n    private final Recorder recorder;<\/code><\/pre>\n
    \uff084\uff09Transform \u7684isIncremental()<\/code>\u65b9\u6cd5\u8868\u793a\u662f\u5426\u652f\u6301\u589e\u91cf\u7f16\u8bd1\uff0c\u8fd4\u56detrue\u7684\u8bdd\u8868\u793a\u652f\u6301\uff0c\u8fd9\u4e2a\u65f6\u5019\u53ef\u4ee5\u6839\u636e com.android.build.api.transform.TransformInput<\/code>\u6765\u83b7\u5f97\u66f4\u6539\u3001\u79fb\u9664\u6216\u8005\u6dfb\u52a0\u7684\u6587\u4ef6\u76ee\u5f55\u6216\u8005jar\u5305\u3002<\/p>\n
    \/**\n * The input to a Transform.\n * <p>\n * It is mostly composed of a list of {@link JarInput} and a list of {@link DirectoryInput}.\n *\/\npublic interface TransformInput {\n\n    \/**\n     * Returns a collection of {@link JarInput}.\n     *\/\n    @NonNull\n    Collection<JarInput> getJarInputs();\n\n    \/**\n     * Returns a collection of {@link DirectoryInput}.\n     *\/\n    @NonNull\n    Collection<DirectoryInput> getDirectoryInputs();\n}<\/code><\/pre>\n
    JarInput<\/code>\u6709\u4e00\u4e2a\u65b9\u6cd5\u662fgetStatus()<\/code>\u6765\u83b7\u53d6 com.android.build.api.transform.Status\u3002Status<\/code>\u662f\u4e00\u4e2a\u679a\u4e3e\u7c7b\uff0c\u5305\u542b\u4e86NOTCHANGED<\/code>\u3001ADDED<\/code>\u3001CHANGED<\/code>\u3001REMOVED<\/code>\uff0c\u6240\u4ee5\u53ef\u4ee5\u6839\u636eJarInput<\/code>\u7684status\u6765\u5bf9\u5b83\u8fdb\u884c\u76f8\u5e94\u7684\u5904\u7406\uff0c\u6bd4\u5982\u6dfb\u52a0\u6216\u8005\u79fb\u9664\u3002<\/p>\n
    DirectoryInput<\/code>\u6709\u4e00\u4e2a\u65b9\u6cd5getChangedFiles()<\/code>\u5f00\u83b7\u53d6\u4e00\u4e2aMap<File, Status><\/code>\u96c6\u5408\uff0c\u6240\u4ee5\u53ef\u4ee5\u904d\u5386\u8fd9\u4e2aMap\u96c6\u5408\uff0c\u7136\u540e\u6839\u636eFile\u5bf9\u5e94\u7684Status\u6765\u5bf9File\u8fdb\u884c\u5904\u7406\u3002<\/p>\n
    \u5982\u679c\u4e0d\u652f\u6301\u589e\u91cf\u7f16\u8bd1\uff0c\u5c31\u5728\u5904\u7406.class<\/code>\u4e4b\u524d\u628a\u4e4b\u524d\u7684\u8f93\u51fa\u76ee\u5f55\u4e2d\u7684\u6587\u4ef6\u5220\u9664\u3002<\/p>\n
    \u83b7\u53d6TransformInput<\/code>\u5bf9\u8c61\u662f\u6839\u636ecom.android.build.api.transform.TransformInvocation<\/code>\u3002<\/p>\n
    \/**\n * An invocation object used to pass of pertinent information for a\n * {@link Transform#transform(TransformInvocation)} call.\n *\/\npublic interface TransformInvocation {\n\n    \/\/ \u8fd4\u56detransform\u8fd0\u884c\u7684\u4e0a\u4e0b\u6587\uff0c\u5728android gradle plugin\u4e2d\u6709\u552f\u4e00\u7684\u5b9e\u73b0\u7c7bTransformTask\n    \/**\n     * Returns the context in which the transform is run.\n     * @return the context in which the transform is run.\n     *\/\n    @NonNull\n    Context getContext();\n\n    \/\/ \u83b7\u53d6transform\u7684\u8f93\u5165\n    \/**\n     * Returns the inputs\/outputs of the transform.\n     * @return the inputs\/outputs of the transform.\n     *\/\n    @NonNull\n    Collection<TransformInput> getInputs();\n\n    \/**\n     * Returns the referenced-only inputs which are not consumed by this transformation.\n     * @return the referenced-only inputs.\n     *\/\n    @NonNull Collection<TransformInput> getReferencedInputs();\n    \/**\n     * Returns the list of secondary file changes since last. Only secondary files that this\n     * transform can handle incrementally will be part of this change set.\n     * @return the list of changes impacting a {@link SecondaryInput}\n     *\/\n    @NonNull Collection<SecondaryInput> getSecondaryInputs();\n\n    \/\/ TransformOutputProvider\u7528\u4e8e\u5220\u9664\u8f93\u51fa\u76ee\u5f55\u6216\u8005\u521b\u5efa\u6587\u4ef6\u5bf9\u5e94\u7684\u751f\u6210\u76ee\u5f55\n    \/**\n     * Returns the output provider allowing to create content.\n     * @return he output provider allowing to create content.\n     *\/\n    @Nullable\n    TransformOutputProvider getOutputProvider();\n\n    \/\/ transform\u8fc7\u7a0b\u662f\u5426\u652f\u6301\u589e\u91cf\u7f16\u8bd1\n    \/**\n     * Indicates whether the transform execution is incremental.\n     * @return true for an incremental invocation, false otherwise.\n     *\/\n    boolean isIncremental();\n}<\/code><\/pre>\n
    TransformInvocation<\/code>\u5305\u542b\u4e86\u8f93\u5165\u3001\u8f93\u51fa\u76f8\u5173\u4fe1\u606f\u3002\u5176\u8f93\u51fa\u76f8\u5173\u5185\u5bb9\u662f\u7531TransformOutputProvider<\/code>\u6765\u505a\u5904\u7406\u3002TransformOutputProvider<\/code>\u7684getContentLocation()<\/code>\u65b9\u6cd5\u53ef\u4ee5\u83b7\u53d6\u6587\u4ef6\u7684\u8f93\u51fa\u76ee\u5f55\uff0c\u5982\u679c\u76ee\u5f55\u5b58\u5728\u7684\u8bdd\u76f4\u63a5\u8fd4\u56de\uff0c\u5982\u679c\u4e0d\u5b58\u5728\u5c31\u4f1a\u91cd\u65b0\u521b\u5efa\u4e00\u4e2a\u3002\u4f8b\u5982\uff1a<\/p>\n
    \/\/ getContentLocation\u65b9\u6cd5\u76f8\u5f53\u4e8e\u521b\u5efa\u4e00\u4e2a\u5bf9\u5e94\u540d\u79f0\u8868\u793a\u7684\u76ee\u5f55\n\/\/ \u662f\u4ece0\u30011\u30012\u5f00\u59cb\u9012\u589e\u3002\u5982\u679c\u662f\u76ee\u5f55\uff0c\u540d\u79f0\u5c31\u662f\u5bf9\u5e94\u7684\u6570\u5b57\uff0c\u5982\u679c\u662fjar\u5305\u5c31\u7c7b\u4f3c0.jar\nFile outputDir = transformInvocation.outputProvider.getContentLocation("include", \n         dirInput.contentTypes, dirInput.scopes, Format.DIRECTORY)\n\nFile outputJar = transformInvocation.outputProvider.getContentLocation(jarInput.name\n        , jarInput.contentTypes\n        , jarInput.scopes\n        , Format.JAR)<\/code><\/pre>\n
    \u5728\u6267\u884c\u7f16\u8bd1\u8fc7\u7a0b\u4e2d\u4f1a\u751f\u6210\u5bf9\u5e94\u7684\u76ee\u5f55\uff0c\u4f8b\u5982\u5728\/app\/build\/intermediates\/transforms<\/code>\u76ee\u5f55\u4e0b\u751f\u6210\u4e86\u4e00\u4e2a\u540d\u4e3aajx<\/code>\u7684\u76ee\u5f55\uff0c\u8fd9\u4e2a\u540d\u79f0\u5c31\u662f\u6839\u636e\u81ea\u5b9a\u4e49\u7684Transform<\/code>\u7c7bgetName()<\/code>\u65b9\u6cd5\u8fd4\u56de\u7684\u5b57\u7b26\u4e32\u6765\u7684\u3002<\/p>\n
    ajx\u76ee\u5f55\u4e0b\u8fd8\u4f1a\u6709\u4e00\u4e2a\u540d\u4e3a__content__.json<\/code>\u6587\u4ef6\u3002\u8be5\u6587\u4ef6\u4e2d\u5c55\u793a\u4e86ajx\u4e2d\u6587\u4ef6\u76ee\u5f55\u4e0b\u7684\u5185\u5bb9<\/p>\n
    \u5176\u5b9e\u5f53\u6ce8\u5165\u4e00\u4e2a\u81ea\u5b9a\u4e49\u7684Transform<\/code>\u7684\u65f6\u5019\u8fd8\u4f1a\u751f\u6210\u5bf9\u5e94\u7684Task\uff0c\u5373TransformTask<\/code>\uff0c\u8be5Task\u8fd8\u4f1a\u6709\u4e00\u4e2a\u5bf9\u5e94\u7684\u540d\u79f0\uff0c\u4f8b\u5982\uff1a<\/p>\n
    transformClassesWithAjxForDebug\ntransformClassesWithAjxForDebugAndroidTest\ntransformClassesWithAjxForRelease<\/code><\/pre>\n
    \u8fd9\u4e2a\u540d\u79f0\u751f\u6210\u8fc7\u7a0b\u662f\u5728TransformManager<\/code>\u7684addTransform()<\/code>\u4e2d\uff1a<\/p>\n
    public <T extends Transform> Optional<TransformTask> addTransform(\n            @NonNull TaskFactory taskFactory,\n            @NonNull TransformVariantScope scope,\n            @NonNull T transform,\n            @Nullable TransformTask.ConfigActionCallback<T> callback) {\n...\n        String taskName = scope.getTaskName(getTaskNamePrefix(transform));\n...\n}\n\nstatic String getTaskNamePrefix(@NonNull Transform transform) {\n    StringBuilder sb = new StringBuilder(100);\n    sb.append("transform");\n\n    sb.append(\n        transform\n            .getInputTypes()\n            .stream()\n            .map(\n                inputType ->\n                    CaseFormat.UPPER_UNDERSCORE.to(\n                        CaseFormat.UPPER_CAMEL, inputType.name()))\n            .sorted() \/\/ Keep the order stable.\n            .collect(Collectors.joining("And")));\n    sb.append("With");\n    StringHelper.appendCapitalized(sb, transform.getName());\n    sb.append("For");\n\n    return sb.toString();\n}<\/code><\/pre>\n
    \u5728Transform<\/code>\u4e2d\uff0c\u5176transform()<\/code>\u65b9\u6cd5\u662f\u91cd\u5934\u620f\uff0c\u9700\u8981\u5bf9\u8f93\u5165\u7684\u6587\u4ef6\u8fdb\u884c\u5904\u7406\uff0c\u7136\u540e\u653e\u5230\u8f93\u51fa\u76ee\u5f55\u4e2d\u3002<\/p>\n
    \u4f8b\u5982\uff0c\u81ea\u5b9a\u4e49\u4e00\u4e2aTransform<\/code>\u5b50\u7c7b\uff0c\u7136\u540e\u5728transform<\/code>\u8fc7\u7a0b\u628a\u8f93\u5165\u7684\u76ee\u5f55\u4e2d\u7684.class<\/code>\u6587\u4ef6\u6216\u8005jar\u5305\u4e2d\u7684.class<\/code>\u6587\u4ef6\u4f7f\u7528aspectj<\/code>\u8fdb\u884c\u5904\u7406\u3002<\/p>\n
    @Override\nvoid transform(TransformInvocation transformInvocation) throws TransformException, InterruptedException, IOException {\n    TransformTask transformTask = (TransformTask) transformInvocation.context\n    \/\/VariantCache \u5c31\u662f\u4fdd\u5b58\u4e00\u4e9b\u8ddf\u5f53\u524dvariant\u76f8\u5173\u7684\u4e00\u4e9b\u7f13\u5b58\uff0c\u4ee5\u53ca\u5728\u652f\u6301\u589e\u91cf\u7f16\u8bd1\u7684\u60c5\u51b5\u4e0b\u5b58\u50a8\u4e00\u4e9b\u4fe1\u606f\n    VariantCache variantCache = new VariantCache(ajxProcedure.project, ajxProcedure.ajxCache, transformTask.variantName)\n\n    if (transformInvocation.isIncremental()) {\n        \/\/TODO \u589e\u91cf\n        print("====================\u589e\u91cf\u7f16\u8bd1=================")\n    }else {\n        print("====================\u975e\u589e\u91cf\u7f16\u8bd1=================")\n        \/\/\u975e\u589e\u91cf,\u9700\u8981\u5220\u9664\u8f93\u51fa\u76ee\u5f55\n        transformInvocation.outputProvider.deleteAll()\n        variantCache.reset()\n\n        AJXFileProcess ajxFileProcess = new AJXFileProcess(project, variantCache, transformInvocation)\n        ajxFileProcess.proceed()\n        AJXTaskProcess ajxTaskProcess = new AJXTaskProcess(project, variantCache, transformInvocation)\n        ajxTaskProcess.proceed()\n    }\n}<\/code><\/pre>\n
    Transform\u4e2d\u7684transform()\u65b9\u6cd5\u662f\u5982\u4f55\u88ab\u6267\u884c\u7684<\/h2>\n
    \u6211\u4eec\u5728\u524d\u9762\u8bb2\u5230\u7684\u8c03\u7528android.registerTransform(transform)<\/code>\u6ce8\u518c\u65b9\u6cd5\uff0c\u5b9e\u9645\u4e0a\u53ea\u662f\u628aTransform<\/code>\u5bf9\u8c61\u653e\u5230\u4e86\u4e00\u4e2aList\u96c6\u5408\u4e2d\u3002\u90a3\u4e48\u4ec0\u4e48\u65f6\u5019\u7528\u5230\u8fd9\u4e2a\u96c6\u5408\u5462\uff1f\u4e5f\u5c31\u662f\u8bf4Transform<\/code>\u7684transform()<\/code>\u65b9\u6cd5\u662f\u4ec0\u4e48\u65f6\u5019\u88ab\u6267\u884c\u7684\u5462\uff1f<\/p>\n
    \u5b9e\u9645\u4e0a\uff0cTransform<\/code>\u7684transform()<\/code>\u65b9\u6cd5\u662f\u5728TransformTask<\/code>\u7684transform()<\/code>\u65b9\u6cd5\u4e2d\u6267\u884c\u7684\u3002<\/p>\n
    # com.android.build.gradle.internal.pipeline.TransformTask\n@TaskAction\nvoid transform(final IncrementalTaskInputs incrementalTaskInputs)\n        throws IOException, TransformException, InterruptedException {\n    ...\n    recorder.record(\n        ExecutionType.TASK_TRANSFORM,\n        executionInfo,\n        getProject().getPath(),\n        getVariantName(),\n        new Recorder.Block<Void>() {\n            @Override\n            public Void call() throws Exception {\n                transform.transform(\n                    new TransformInvocationBuilder(TransformTask.this)\n                        .addInputs(consumedInputs.getValue())\n                        .addReferencedInputs(referencedInputs.getValue())\n                        .addSecondaryInputs(changedSecondaryInputs.getValue())\n                        .addOutputProvider(\n                            outputStream != null\n                                ? outputStream.asOutput()\n                                : null)\n                        .setIncrementalMode(isIncremental.getValue())\n                        .build());\n                if (outputStream != null) {\n                    outputStream.save();\n                }\n                return null;\n            }\n        });\n}<\/code><\/pre>\n
    \u5b9e\u9645\u4e0a\u6bcf\u4e2aTransform\u90fd\u4f1a\u6709\u4e00\u4e2a\u5bf9\u5e94\u7684TransformTask<\/code>\uff0cTransformTask<\/code>\u672c\u8d28\u4e0a\u5c31\u662f\u8868\u793aGradle\u4e2d\u7684\u4e00\u4e2aTask\uff0c\u90a3\u4e48\u4e00\u4e2aTask\u5728\u6267\u884c\u7684\u65f6\u5019\u5176@TaskAction<\/code>\u6ce8\u89e3\u7684\u65b9\u6cd5\u4f1a\u88ab\u6267\u884c\uff0c\u4e5f\u5c31\u662fcom.android.build.gradle.internal.pipeline.TransformTask#transform()<\/code>\u65b9\u6cd5\u4f1a\u88ab\u6267\u884c\uff0c\u5728\u8be5\u65b9\u6cd5\u4e2d\u4f1a\u8c03\u7528\u8be5TransformTask<\/code>\u5bf9\u5e94\u7684Transform<\/code>\u5bf9\u8c61\u7684transform()<\/code>\u65b9\u6cd5\u3002<\/p>\n
    \u5199\u8fc7Gradle\u63d2\u4ef6\u7684\u90fd\u77e5\u9053\uff0c\u5728build.gradle<\/code>\u4e2dapply \u63d2\u4ef6\u540e\u5176apply(project)<\/code>\u65b9\u6cd5\u5c31\u4f1a\u8c03\u7528\u3002\u4f8b\u5982\u6211\u4eec\u5728\u4e00\u4e2aapp\u4e2d\u5e94\u7528\u7684\u662fapply plugin: 'com.andorid.application'<\/code>\uff0c\u8fd9\u4e2a\u5b9e\u9645\u4e0a\u5f15\u5165\u7684\u5c31\u662fAppPlugin\uff0c\u5176apply()\u65b9\u6cd5\u4f1a\u88ab\u8c03\u7528\u3002\u5173\u4e8e\u8fd9\u4e2a\u6e90\u7801\u8fc7\u7a0b\u6211\u4eec\u5c31\u4e0d\u591a\u8bf4\u4e86\uff0c\u6211\u4eec\u53ea\u8bb2\u4e00\u4e2a\u8fd9\u4e2a\u8fc7\u7a0b\uff1a<\/p>\n
    ->com.android.build.gradle.BasePlugin#apply()\n->com.android.build.gradle.BasePlugin#createTasks()\n->com.android.build.gradle.BasePlugin#createAndroidTasks()\n->com.android.build.gradle.internal.VariantManager#createAndroidTasks()\n->com.android.build.gradle.internal.VariantManager#createTasksForVariantData()\n->com.android.build.gradle.internal.ApplicationTaskManager#createTasksForVariantScope() \/\/\u8be5\u65b9\u6cd5\u4e2d\u5e72\u7684\u4e8b\u5f88\u591a\uff0c\u53ef\u4ee5\u91cd\u70b9\u5173\u6ce8\n->com.android.build.gradle.internal.ApplicationTaskManager#addCompileTask()\n->com.android.build.gradle.internal.TaskManager#createPostCompilationTasks() \/\/\u5728\u8fd9\u4e2a\u65b9\u6cd5\u4e2d\u4f1a\u8c03\u7528AppExtension\u7684getTransforms()\u65b9\u6cd5\uff0c\u4e5f\u5c31\u662f\u6211\u4eec\u4e4b\u524d\u6ce8\u518c\u7684transform\n->com.android.build.gradle.internal.pipeline.TransformManager#addTransform() \/\/\u5728\u8fd9\u4e2a\u65b9\u6cd5\u4e2d\u521b\u5efa\u4e86TransformTask<\/code><\/pre>\n
    \u5728\u4e0a\u9762\u7684\u8fd9\u4e9b\u6d41\u7a0b\u4e2dTaskManager<\/code>\u7684createPostCompilationTasks()<\/code>\u9700\u8981\u91cd\u70b9\u5173\u6ce8\uff0c\u5728\u8be5\u65b9\u6cd5\u4e2d\u5bf9Apk\u6253\u5305\u8fc7\u7a0b\u4e2d\u7684\u5404\u79cdTransform<\/code>\u8fdb\u884c\u5904\u7406\uff0c\u521b\u5efa\u5bf9\u5e94TransformTask<\/code>\u5e76\u6784\u5efa\u9690\u5f0f\u7684\u4f9d\u8d56\u5173\u7cfb\u3002<\/p>\n
    \u5230\u6b64TransformTask<\/code>\u662f\u521b\u5efa\u5b8c\u6bd5\uff0cTransformTask<\/code>\u76f8\u5f53\u4e8e\u662f\u5bf9\u6211\u4eec\u81ea\u5b9a\u4e49\u7684Transform<\/code>\u8fdb\u884c\u7684\u5305\u88c5\u3002<\/p>\n
    \u90a3\u4e48\u8fd9\u4e2aTransformTask\u662f\u4ec0\u4e48\u65f6\u5019\u6267\u884c\u5462\uff1f<\/p>\n
    \u6211\u4eec\u53ef\u4ee5\u663e\u5f0f\u5730\u4f7f\u7528Gradle\u547d\u4ee4\u53bb\u6267\u884c\u4e00\u4e2aTask\uff0c\u8fd9\u662f\u6ca1\u95ee\u9898\u7684\u3002\u4f46\u4e3a\u4ec0\u4e48\u6211\u4eec\u6267\u884cgradle assemble<\/code>\u547d\u4ee4\u7684\u65f6\u5019\uff0cTransformTask<\/code>\u4e5f\u4f1a\u6267\u884c\u5462\uff1f\u8fd9\u4e2a\u5c31\u7275\u6d89\u5230Task\u7684\u4f9d\u8d56\u5173\u7cfb\u4e86\u3002\u5047\u8bbeTaskA\u4f9d\u8d56TaskB\uff0c\u90a3\u4e48\u5982\u679c\u6211\u4eec\u8981\u6267\u884cTaskA\uff0c\u90a3\u4e48\u5728TaskA\u6267\u884c\u4e4b\u524dTaskB\u5c31\u4f1a\u6267\u884c\u3002\u4f46\u662f\u8981\u6ce8\u610f\u4e00\u70b9\u5c31\u662f\uff0c\u5047\u8bbeTaskA\u4f9d\u8d56TaskB\u548cTaskC\uff0c\u90a3\u4e48\u53ea\u80fd\u4fdd\u8bc1TaskA\u6267\u884c\u4e4b\u524dTaskB\u548cTaskC\u90fd\u6267\u884c\u4e86\uff0c\u5e76\u4e0d\u80fd\u4fdd\u8bc1TaskB\u548cTaskC\u7684\u6267\u884c\u987a\u5e8f\u3002<\/p>\n
    \u6784\u5efaTask\u7684\u4f9d\u8d56\u5173\u7cfb\u53ef\u4ee5\u663e\u5f0f\u7684\u8c03\u7528\u5176dependsOn()<\/code>\u65b9\u6cd5\u3002\u4f46\u662f\u6211\u5728\u67e5\u770bTransform API<\/code>\u7684\u8fc7\u7a0b\u4e2d\u53d1\u73b0\u8fd9\u4e2aTransformTask<\/code>\u4e4b\u95f4\u5e76\u6ca1\u6709\u663e\u5f0f\u5730\u8c03\u7528dependsOn()<\/code>\u65b9\u6cd5\u6765\u4fdd\u8bc1\u4f9d\u8d56\u5173\u7cfb\uff0c\u96be\u9053\u8fd9\u4e2aTransformTask<\/code>\u7684\u6267\u884c\u987a\u5e8f\u662f\u4efb\u610f\u7684\u5417\uff1f\u5982\u679c\u662f\u4efb\u610f\u7684\uff0c\u6bd4\u5982\u4e00\u4e2atask\u662fdexMerger<\/code>\u662f\u8981\u628a\u6bcf\u4e2aclass\u7f16\u8bd1\u6210\u7684dex\u5408\u6210\u4e3a\u4e00\u4e2adex\uff0c\u800c\u6b64\u65f6\u8f93\u5165\u76ee\u5f55\u4e2d\u8fd8\u6ca1\u6709dex\u5b58\u5728\uff0c\u8be5\u4efb\u52a1\u4e0d\u5c31\u5931\u8d25\u4e86\u5417\uff1fandroid gradle plugin<\/code>\u7684\u5f00\u53d1\u8005\u5f53\u7136\u4e0d\u4f1a\u8ba9\u8fd9\u79cd\u60c5\u51b5\u5b58\u5728\u3002<\/p>\n
    \u5b9e\u9645\u60c5\u51b5\u662fTask\u9664\u4e86\u663e\u5f0f\u5730\u901a\u8fc7dependsOn<\/code>\u6765\u6307\u5b9aTask\u4f9d\u8d56\uff0c\u5176\u5b9e\u8fd8\u53ef\u4ee5\u4f7f\u7528Task\u4f9d\u8d56\u63a8\u65ad\u6765\u5224\u65ad\u4f9d\u8d56\u5173\u7cfb\uff0cGradle\u901a\u8fc7\u4f7f\u7528\u4e00\u4e2aTask\u7684\u8f93\u51fa\u4f5c\u4e3a\u53e6\u4e00\u4e2aTask\u7684\u8f93\u5165\uff0c\u5c31\u53ef\u4ee5\u63a8\u65ad\u51fa\u4f9d\u8d56\u5173\u7cfb\u3002<\/p>\n
    \u5728Transform API<\/code>\u4e2d\uff0c\u4f7f\u7528\u7684\u662fTransformStream<\/code>\u6765\u8fde\u63a5TransformTask<\/code>\u7684\u4f9d\u8d56\u5173\u7cfb\uff0c\u8fdb\u884c\u63a7\u5236Transform<\/code>\u7684\u6267\u884c\u987a\u5e8f\u3002\u8ba1\u7b97TransformTask<\/code>\u7684\u8f93\u5165\u8f93\u51fa\u662f\u5728TransformManager<\/code>\u7684addTransform()<\/code>\u65b9\u6cd5\u4e2d\u3002\u901a\u8fc7\u8f93\u5165\u8f93\u51fa\u5df2\u7ecf\u9690\u5f0f\u5730\u786e\u5b9a\u4e86TransformTask<\/code>\u7684\u4f9d\u8d56\u5173\u7cfb\u3002<\/p>\n
    # com.android.build.gradle.internal.pipeline.TransformManager\npublic <T extends Transform> Optional<TransformTask> addTransform(\n        @NonNull TaskFactory taskFactory,\n        @NonNull TransformVariantScope scope,\n        @NonNull T transform,\n        @Nullable TransformTask.ConfigActionCallback<T> callback) {\n    ...\n    List<TransformStream> inputStreams = Lists.newArrayList();\n    String taskName = scope.getTaskName(getTaskNamePrefix(transform));\n\n    \/\/ get referenced-only streams\n    List<TransformStream> referencedStreams = grabReferencedStreams(transform);\n\n    \/\/ find input streams, and compute output streams for the transform.\n    \/\/ \u901a\u8fc7\u4e4b\u524d\u6dfb\u52a0\u7684Transform\u6765\u8ba1\u7b97\u8f93\u5165\uff0c\u5e76\u8ba1\u7b97\u8f93\u51fa\n    IntermediateStream outputStream = findTransformStreams(\n            transform,\n            scope,\n            inputStreams,\n            taskName,\n            scope.getGlobalScope().getBuildDir());\n    ...\n    transforms.add(transform);\n\n    \/\/ create the task...\n    \/\/ \u5728\u521b\u5efaTask\u7684\u8fc7\u7a0b\u4e2d\u4f20\u5165\u4e86\u8f93\u5165\u548c\u8f93\u51fa\uff0c\u4e0a\u4e00\u4e2aTask\u7684\u8f93\u51fa\u662f\u8be5Task\u7684\u8f93\u5165\uff0c\u8fd9\u5c31\u4fdd\u8bc1\u4e86Task\u7684\u4e00\u4e2a\u9690\u5f0f\u7684\u4f9d\u8d56\u5173\u7cfb\n    TransformTask task =\n        taskFactory.create(\n            new TransformTask.ConfigAction<>(\n                scope.getFullVariantName(),\n                taskName,\n                transform,\n                inputStreams,\n                referencedStreams,\n                outputStream,\n                recorder,\n                callback));\n\n    return Optional.ofNullable(task);\n}<\/code><\/pre>\n
    \u6240\u4ee5\u901a\u8fc7\u4ee5\u4e0a\u5206\u6790\u4e5f\u53ef\u4ee5\u63a8\u65ad\uff1a\u5f53\u6211\u4eec\u81ea\u5b9a\u4e49Plugin\u8981\u6ce8\u5165\u591a\u4e2aTransform<\/code>\u7684\u65f6\u5019\uff0c\u6309\u7167\u6dfb\u52a0\u987a\u5e8f\u6765\u4fdd\u8bc1\u4f9d\u8d56\u5173\u7cfb\uff0c\u5148\u6dfb\u52a0\u7684Transform<\/code>\u5148\u6267\u884c\u3002\u5bf9\u4e8e\u4e0b\u9762\u7684\u4f8b\u5b50\uff0ctransformA<\/code>\u7684transform()<\/code>\u65b9\u6cd5\u4f1a\u5148\u4e8etransformB<\/code>\u6267\u884c\u3002<\/p>\n
    android.registerTransform(transformA);\nandroid.registerTransform(transformB);<\/code><\/pre>\n
    Android Gradle Plugin\u4e2d\u7684Transform\u5b50\u7c7b<\/h2>\n
    Android Gradle Plugin\u4e2d\u6709\u591a\u4e2aTransform<\/code>\u5b50\u7c7b\uff0c\u5728\u7f16\u5199\u81ea\u5df1\u7684Transform<\/code>\u7c7b\u65f6\u53ef\u4ee5\u4f5c\u4e3a\u4e00\u4e2a\u53c2\u8003\u3002<\/p>\n
    \u603b\u7ed3<\/h2>\n
    \u81ea\u5b9a\u4e49Transform\u5e76\u6ce8\u5165\uff1a<\/p>\n
    class TransformPlugin implements Plugin<Project> {\n    @Override\n    void apply(Project project) {\n        project.android.registerTransform(new ClassTransform(project))\n    }\n}\n\nclass ClassTransform extends Transform {<\/code><\/pre>\n
    Transform API<\/code>\u7684\u6267\u884c\u6709\u987a\u5e8f\uff0c\u6bcf\u4e00\u4e2aTransform\u90fd\u5bf9\u5e94\u4e00\u4e2aTransformTask<\/code>\u548cTransformStream<\/code>\uff0c\u901a\u8fc7\u8f93\u5165\u8f93\u51fa\u9690\u5f0f\u7684\u6784\u6210Task\u4f9d\u8d56\u5173\u7cfb\u3002\u5f00\u53d1\u8005\u81ea\u5b9a\u4e49\u7684Transform\u6309\u7167\u6ce8\u518c\u987a\u5e8f\u6267\u884c\u3002<\/p>\n
    Gradle\u6e90\u7801\u8c03\u8bd5<\/h2>\n
    \u8c03\u8bd5Android Gradle Plugin\u63d2\u4ef6\uff0c\u5b9e\u9645\u4e0a\u4f7f\u7528\u8be5\u65b9\u5f0f\u4e5f\u53ef\u4ee5\u7528\u6765\u8c03\u8bd5\u67e5\u770bAndroid Gradle Plugin\u7684\u6267\u884c\u6d41\u7a0b\u3002\u8fd9\u4e2a\u65f6\u5019\u6700\u597d\u8981\u627e\u5230\u6709\u80fd\u4e0b\u8f7d\u5230\u6e90\u7801\u7684\u7248\u672c\uff0c\u6bd4\u59823.1.2\u3002<\/p>\n
    buildscript {\n    repositories {\n        google()\n        jcenter()\n    }\n    dependencies {\n        ...\n        classpath 'com.android.tools.build:gradle:3.1.2'\n        ...\n    }\n}<\/code><\/pre>\n
    \u5982\u679c\u4f60\u60f3\u8981\u8c03\u8bd5app\u6253\u5305\u8fc7\u7a0b\uff0c\u53ef\u4ee5\u5728AppPlugin<\/code>\u7684apply()<\/code>\u65b9\u6cd5\u4e2d\u6253\u65ad\u70b9\u3002\u5b83\u76f4\u63a5\u8c03\u7528\u4e86\u5176\u7236\u7c7bBasePlugin<\/code>\u7684apply()<\/code>\u65b9\u6cd5\u3002<\/p>\n
    #com.android.build.gradle.AppPlugin\n@Override\npublic void apply(@NonNull Project project) {\n    super.apply(project);\n}<\/code><\/pre>\n
    \u672c\u6587\u8f6c\u8f7d\u81f3\uff1ahttps:\/\/www.jianshu.com\/p\/811b0d0975ef<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"
    Transform API\u662f\u57281.5.0-beta1\u7248\u5f00\u59cb\u4f7f\u7528\uff0c\u5229\u7528Transform API\uff0c\u7b2c\u4e09\u65b9\u7684\u63d2\u4ef6\u53ef […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[202],"tags":[64,460],"class_list":["post-1823","post","type-post","status-publish","format-standard","hentry","category-android-build","tag-gradle","tag-transform-api"],"_links":{"self":[{"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/posts\/1823","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/comments?post=1823"}],"version-history":[{"count":0,"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/posts\/1823\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/media?parent=1823"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/categories?post=1823"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/tags?post=1823"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}