Android构建流程——篇五_suggestion: remove the overlay declaration at andr-优快云博客

本文链接：https://blog.youkuaiyun.com/dbs1215/article/details/108037995

本文深入解析Android构建过程中，processDebugManifest任务的Manifest合并过程，包括核心类MergeManifests和AndroidBuilder.mergeManifestsForApplication的调用链路。接着探讨splitsDiscoveryTaskDebug的任务和processDebugResources任务的资源链接处理，涉及LinkApplicationAndroidResourcesTask及资源映射文件R.txt的生成。最后，简单提及generateDebugSources任务。

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文章目录

Task13: processDebugManifest

1. input/ouput

taskName:processDebugManifest
input:/Users/apple/work/project/AndroidGradleTaskDemo/app/build/intermediates/apk_list/debug/mainApkListPersistenceDebug/apk-list.gson
input:/Users/apple/work/project/AndroidGradleTaskDemo/app/build/intermediates/compatible_screen_manifest/debug/createDebugCompatibleScreenManifests/out
input:/Users/apple/work/project/AndroidGradleTaskDemo/app/src/main/AndroidManifest.xml
input:/Users/apple/.gradle/caches/transforms-1/files-1.1/appcompat-v7-26.1.0.aar/2774ea4f1cf1e83a6ad8e8d3c8b463b6/AndroidManifest.xml
input:/Users/apple/.gradle/caches/transforms-1/files-1.1/constraint-layout-1.1.3.aar/f43c0ba95b6494825ed940fc4f04662b/AndroidManifest.xml
input:/Users/apple/.gradle/caches/transforms-1/files-1.1/animated-vector-drawable-26.1.0.aar/559112320064089dfaf6780e71d5b44f/AndroidManifest.xml
input:/Users/apple/.gradle/caches/transforms-1/files-1.1/support-vector-drawable-26.1.0.aar/c2c3ad4abfd49316f6769b8238b0f010/AndroidManifest.xml
input:/Users/apple/.gradle/caches/transforms-1/files-1.1/support-v4-26.1.0.aar/9ac5f97e8ccb24c52b7cbb6202c12ad0/AndroidManifest.xml
input:/Users/apple/.gradle/caches/transforms-1/files-1.1/support-media-compat-26.1.0.aar/53ab5ad72634f3497309a8788f3ca200/AndroidManifest.xml
input:/Users/apple/.gradle/caches/transforms-1/files-1.1/support-fragment-26.1.0.aar/7e6a4ce6591d722d47aafc36d980f8b4/AndroidManifest.xml
input:/Users/apple/.gradle/caches/transforms-1/files-1.1/support-core-utils-26.1.0.aar/4c474caa9ac1f01c4936bd96905ecacd/AndroidManifest.xml
input:/Users/apple/.gradle/caches/transforms-1/files-1.1/support-core-ui-26.1.0.aar/868eaa7e0c620cd85d72ad4f340e8bb1/AndroidManifest.xml
input:/Users/apple/.gradle/caches/transforms-1/files-1.1/support-compat-26.1.0.aar/4ec3c1c46e5bad9ac3b91f45a2afec3e/AndroidManifest.xml
input:/Users/apple/.gradle/caches/transforms-1/files-1.1/runtime-1.0.0.aar/5b2333922ba05b1f174de51739b24d14/AndroidManifest.xml
=========================================================
output:/Users/apple/work/project/AndroidGradleTaskDemo/app/build/intermediates/instant_run_merged_manifests/debug/processDebugManifest/instant-run
output:/Users/apple/work/project/AndroidGradleTaskDemo/app/build/intermediates/merged_manifests/debug/processDebugManifest/merged
output:/Users/apple/work/project/AndroidGradleTaskDemo/app/build/outputs/logs/manifest-merger-debug-report.txt

该任务是用来合并所有Manifests清单文件

2. 整体流程

在这里插入图片描述

3. 调用链路

整个merge重点集中在ManifestMerge2.merge方法中

4. 核心类(MergeManifests)

public class MergeManifests extends ManifestProcessorTask {
   
	...
	@Override
    protected void doFullTaskAction() throws IOException {
   
        // read the output of the compatible screen manifest.
        BuildElements compatibleScreenManifests =
                ExistingBuildElements.from(
                        InternalArtifactType.COMPATIBLE_SCREEN_MANIFEST, compatibleScreensManifest);

        ModuleMetadata moduleMetadata = null;
        if (packageManifest != null && !packageManifest.isEmpty()) {
   
            moduleMetadata = ModuleMetadata.load(packageManifest.getSingleFile());
            boolean isDebuggable = optionalFeatures.get().contains(Feature.DEBUGGABLE);
            if (moduleMetadata.getDebuggable() != isDebuggable) {
   
                ...
            }
        }


        @Nullable BuildOutput compatibleScreenManifestForSplit;

        ImmutableList.Builder<BuildOutput> mergedManifestOutputs = ImmutableList.builder();
        ImmutableList.Builder<BuildOutput> irMergedManifestOutputs = ImmutableList.builder();

        // FIX ME : multi threading.
        // TODO : LOAD the APK_LIST FILE .....
        for (ApkData apkData : outputScope.getApkDatas()) {
   

            compatibleScreenManifestForSplit = compatibleScreenManifests.element(apkData);
			// 1. 构建一个合并的清单文件；
			// path:build/intermediates/merged_manifests/${buildType}/process${BuildType}Manifest/merged/AndroidManifest.xml
            File manifestOutputFile =
                    FileUtils.join(
                            getManifestOutputDirectory(),
                            apkData.getDirName(),
                            SdkConstants.ANDROID_MANIFEST_XML);
            File instantRunManifestOutputFile =
                    FileUtils.join(
                            getInstantRunManifestOutputDirectory(),
                            apkData.getDirName(),
                            SdkConstants.ANDROID_MANIFEST_XML);
			// 2. merge AndroidManifest.xml
            MergingReport mergingReport =
                    getBuilder()
                            .mergeManifestsForApplication(
                                    getMainManifest(),
                                    getManifestOverlays(),
                                    computeFullProviderList(compatibleScreenManifestForSplit),
                                    getNavigationFiles(),
                                    getFeatureName(),
                                    moduleMetadata == null
                                            ? getPackageOverride()
                                            : moduleMetadata.getApplicationId(),
                                    moduleMetadata == null
                                            ? apkData.getVersionCode()
                                            : Integer.parseInt(moduleMetadata.getVersionCode()),
                                    moduleMetadata == null
                                            ? apkData.getVersionName()
                                            : moduleMetadata.getVersionName(),
                                    getMinSdkVersion(),
                                    getTargetSdkVersion(),
                                    getMaxSdkVersion(),
                                    manifestOutputFile.getAbsolutePath(),
                                    // no aapt friendly merged manifest file necessary for applications.
                                    null /* aaptFriendlyManifestOutputFile */,
                                    instantRunManifestOutputFile.getAbsolutePath(),
                                    ManifestMerger2.MergeType.APPLICATION,
                                    variantConfiguration.getManifestPlaceholders(),
                                    getOptionalFeatures(),
                                    getReportFile());

            XmlDocument mergedXmlDocument =
                    mergingReport.getMergedXmlDocument(MergingReport.MergedManifestKind.MERGED);

            ImmutableMap<String, String> properties =
                    mergedXmlDocument != null
                            ? ImmutableMap.of(
                                    "packageId",
                                    mergedXmlDocument.getPackageName(),
                                    "split",
                                    mergedXmlDocument.getSplitName(),
                                    SdkConstants.ATTR_MIN_SDK_VERSION,
                                    mergedXmlDocument.getMinSdkVersion())
                            : ImmutableMap.of();

            mergedManifestOutputs.add(
                    new