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文章序號

此篇文章將分析如下7個task。

:app:mergeDebugJniLibFolders
:app:transformNativeLibsWithMergeJniLibsForDebug
:app:processDebugJavaRes NO-SOURCE
:app:transformResourcesWithMergeJavaResForDebug
:app:validateSigningDebug
:app:packageDebug
:app:assembleDebug

mergeDebugJniLibFolders

執(zhí)行命令：./gradlew mergeDebugJniLibFolders

inputs&outputs

input file:/Users/chao.zheng/sunday/OpenSpace/TasksPro/app/src/debug/jniLibs
input file:/Users/chao.zheng/sunday/OpenSpace/TasksPro/app/src/main/jniLibs
---------------------------------------------------
output file:/Users/chao.zheng/sunday/OpenSpace/TasksPro/app/build/intermediates/incremental/mergeDebugJniLibFolders
output file:/Users/chao.zheng/sunday/OpenSpace/TasksPro/app/build/intermediates/jniLibs/debug

輸入文件也就是我們項目的jniLibs目錄。

輸出分為兩種：

增量編譯的目錄（intermediates/incremental/mergeDebugJniLibFolders）,暫不分析;

jniLibs目錄（intermediates/jniLibs/debug）。

通過輸入輸出基本能判斷mergeDebugJniLibFolders任務就是把項目的jniLibs目錄合到intermediates/jniLibs/debug下面。

源碼

https://android.googlesource.com/platform/tools/base/+/gradle_3.0.0/build-system/gradle-core/src/main/java/com/android/build/gradle/tasks/MergeSourceSetFolders.java

主要代碼邏輯

看到MergeSourceSetFolders這個類是不是很熟悉？在介紹mergeDebugAssetstask時，有分析到這個類，這里就不在具體分析了，實際干的事情類似，就是將相應的目錄下的文件merge到一個指定的目錄下。

transformNativeLibsWithMergeJniLibsForDebug

執(zhí)行命令：./gradlew transformNativeLibsWithMergeJniLibsForDebug

inputs&outputs

input file:/Users/chao.zheng/.gradle/caches/transforms-1/files-1.1/appcompat-v7-26.1.0.aar/6b443e96f1af9aa241aaa70576c67a57/jars/classes.jar
input file:/Users/chao.zheng/.gradle/caches/transforms-1/files-1.1/constraint-layout-1.1.3.aar/f44da5c361a1f52801511229596f72e7/jars/classes.jar
input file:/Users/chao.zheng/.gradle/caches/transforms-1/files-1.1/butterknife-8.5.1.aar/9d5de52440cb778daab09db33955642f/jars/classes.jar
input file:/Users/chao.zheng/.gradle/caches/transforms-1/files-1.1/animated-vector-drawable-26.1.0.aar/9c804d63d6f065a8f9945f9ad94fee0e/jars/classes.jar
input file:/Users/chao.zheng/.gradle/caches/transforms-1/files-1.1/support-vector-drawable-26.1.0.aar/4e56cc34abf77378e2b8d16ee237c82d/jars/classes.jar
input file:/Users/chao.zheng/.gradle/caches/modules-2/files-2.1/com.jakewharton/butterknife-annotations/8.5.1/bb67dad90bab7cd77a8f7f1b8442b47e3a2326bc/butterknife-annotations-8.5.1.jar
input file:/Users/chao.zheng/.gradle/caches/transforms-1/files-1.1/support-v4-26.1.0.aar/3bf8586900bd31e222ef8b68bfd6e744/jars/classes.jar
input file:/Users/chao.zheng/.gradle/caches/transforms-1/files-1.1/support-media-compat-26.1.0.aar/267524a16ca7128dd9cef3c19f394439/jars/classes.jar
input file:/Users/chao.zheng/.gradle/caches/transforms-1/files-1.1/support-fragment-26.1.0.aar/77cf518e9868987a283f04cec221fefa/jars/classes.jar
input file:/Users/chao.zheng/.gradle/caches/transforms-1/files-1.1/support-core-utils-26.1.0.aar/8634ab1afa6a5a1a947a7bd163aba14f/jars/classes.jar
input file:/Users/chao.zheng/.gradle/caches/transforms-1/files-1.1/support-core-ui-26.1.0.aar/8902e2a864b44d47c26fbc80fdafe175/jars/classes.jar
input file:/Users/chao.zheng/.gradle/caches/transforms-1/files-1.1/support-compat-26.1.0.aar/3e4c87483eacfb4c962d7380a59a114d/jars/classes.jar
input file:/Users/chao.zheng/.gradle/caches/modules-2/files-2.1/com.android.support/support-annotations/26.1.0/814258103cf26a15fcc26ecce35f5b7d24b73f8/support-annotations-26.1.0.jar
input file:/Users/chao.zheng/.gradle/caches/modules-2/files-2.1/com.android.support.constraint/constraint-layout-solver/1.1.3/bde0667d7414c16ed62d3cfe993cff7f9d732373/constraint-layout-solver-1.1.3.jar
input file:/Users/chao.zheng/.gradle/caches/transforms-1/files-1.1/runtime-1.0.0.aar/ed085e7b9476f7a9fef4ffbb323166ba/jars/classes.jar
input file:/Users/chao.zheng/.gradle/caches/modules-2/files-2.1/android.arch.lifecycle/common/1.0.0/e414a4cb28434e25c4f6aa71426eb20cf4874ae9/common-1.0.0.jar
input file:/Users/chao.zheng/.gradle/caches/modules-2/files-2.1/android.arch.core/common/1.0.0/a2d487452376193fc8c103dd2b9bd5f2b1b44563/common-1.0.0.jar
input file:/Users/chao.zheng/sunday/OpenSpace/TasksPro/app/build/intermediates/jniLibs/debug/armeabi-v7a/libcommon-jni.so
input file:/Users/chao.zheng/sunday/OpenSpace/TasksPro/app/build/intermediates/jniLibs/debug/armeabi/libcommon-jni.so
input file:/Users/chao.zheng/sunday/OpenSpace/TasksPro/app/build/intermediates/jniLibs/debug/GDTActionSDK.min.1.2.0.jar
---------------------------------------------------
output file:/Users/chao.zheng/sunday/OpenSpace/TasksPro/app/build/intermediates/incremental/debug-mergeJniLibs/zip-cache
output file:/Users/chao.zheng/sunday/OpenSpace/TasksPro/app/build/intermediates/transforms/mergeJniLibs/debug

查看輸入文件，會發(fā)現(xiàn)輸入文件類型分為兩種：

1、依賴的庫的jar文件；

2、mergeDebugJniLibFolders任務的輸出。

輸出目錄也很簡單，一個是增量編譯的目錄，一個是真正的merge輸出目錄。

源碼

https://android.googlesource.com/platform/tools/base/+/gradle_3.0.0/build-system/gradle-core/src/main/java/com/android/build/gradle/internal/transforms/MergeJavaResourcesTransform.java

主要代碼邏輯

public void transform(@NonNull TransformInvocation invocation)
            throws IOException, TransformException {
        
        ...
        // 輸入inputs、output執(zhí)行merge操作
        state = IncrementalFileMerger.merge(ImmutableList.copyOf(inputs), output, state);
        saveMergeState(state);

        cacheUpdates.forEach(Runnable::run);
    }

通過代碼可以很清晰的知道這個任務就是對輸入進行一個merge操作，merge的邏輯在IncrementalFileMerger類里面，這里不在具體分析。MergeJavaResourcesTransform這個類實際上負責多種類型的merge操作，通過類型區(qū)分,代碼如下：

    if (mergedType == QualifiedContent.DefaultContentType.RESOURCES) {
        acceptedPathsPredicate =
                path -> !path.endsWith(SdkConstants.DOT_CLASS)
                        && !path.endsWith(SdkConstants.DOT_NATIVE_LIBS);
    } else if (mergedType == ExtendedContentType.NATIVE_LIBS) {

transformResourcesWithMergeJavaResForDebug

執(zhí)行命令：./gradlew transformResourcesWithMergeJavaResForDebug

inputs&outputs

input file:/Users/chao.zheng/.gradle/caches/transforms-1/files-1.1/appcompat-v7-26.1.0.aar/6b443e96f1af9aa241aaa70576c67a57/jars/classes.jar
input file:/Users/chao.zheng/.gradle/caches/transforms-1/files-1.1/constraint-layout-1.1.3.aar/f44da5c361a1f52801511229596f72e7/jars/classes.jar
input file:/Users/chao.zheng/.gradle/caches/transforms-1/files-1.1/butterknife-8.5.1.aar/9d5de52440cb778daab09db33955642f/jars/classes.jar
input file:/Users/chao.zheng/.gradle/caches/modules-2/files-2.1/com.squareup.okhttp3/okhttp/3.11.0/75966e05a49046ca2ae734e5626f28837a8d1e82/okhttp-3.11.0.jar
input file:/Users/chao.zheng/.gradle/caches/transforms-1/files-1.1/animated-vector-drawable-26.1.0.aar/9c804d63d6f065a8f9945f9ad94fee0e/jars/classes.jar
input file:/Users/chao.zheng/.gradle/caches/transforms-1/files-1.1/support-vector-drawable-26.1.0.aar/4e56cc34abf77378e2b8d16ee237c82d/jars/classes.jar
input file:/Users/chao.zheng/.gradle/caches/modules-2/files-2.1/com.jakewharton/butterknife-annotations/8.5.1/bb67dad90bab7cd77a8f7f1b8442b47e3a2326bc/butterknife-annotations-8.5.1.jar
input file:/Users/chao.zheng/.gradle/caches/transforms-1/files-1.1/support-v4-26.1.0.aar/3bf8586900bd31e222ef8b68bfd6e744/jars/classes.jar
input file:/Users/chao.zheng/.gradle/caches/transforms-1/files-1.1/support-media-compat-26.1.0.aar/267524a16ca7128dd9cef3c19f394439/jars/classes.jar
input file:/Users/chao.zheng/.gradle/caches/transforms-1/files-1.1/support-fragment-26.1.0.aar/77cf518e9868987a283f04cec221fefa/jars/classes.jar
input file:/Users/chao.zheng/.gradle/caches/transforms-1/files-1.1/support-core-utils-26.1.0.aar/8634ab1afa6a5a1a947a7bd163aba14f/jars/classes.jar
input file:/Users/chao.zheng/.gradle/caches/transforms-1/files-1.1/support-core-ui-26.1.0.aar/8902e2a864b44d47c26fbc80fdafe175/jars/classes.jar
input file:/Users/chao.zheng/.gradle/caches/transforms-1/files-1.1/support-compat-26.1.0.aar/3e4c87483eacfb4c962d7380a59a114d/jars/classes.jar
input file:/Users/chao.zheng/.gradle/caches/modules-2/files-2.1/com.android.support/support-annotations/26.1.0/814258103cf26a15fcc26ecce35f5b7d24b73f8/support-annotations-26.1.0.jar
input file:/Users/chao.zheng/.gradle/caches/modules-2/files-2.1/com.android.support.constraint/constraint-layout-solver/1.1.3/bde0667d7414c16ed62d3cfe993cff7f9d732373/constraint-layout-solver-1.1.3.jar
input file:/Users/chao.zheng/.gradle/caches/modules-2/files-2.1/com.squareup.okio/okio/1.14.0/102d7be47241d781ef95f1581d414b0943053130/okio-1.14.0.jar
input file:/Users/chao.zheng/.gradle/caches/transforms-1/files-1.1/runtime-1.0.0.aar/ed085e7b9476f7a9fef4ffbb323166ba/jars/classes.jar
input file:/Users/chao.zheng/.gradle/caches/modules-2/files-2.1/android.arch.lifecycle/common/1.0.0/e414a4cb28434e25c4f6aa71426eb20cf4874ae9/common-1.0.0.jar
input file:/Users/chao.zheng/.gradle/caches/modules-2/files-2.1/android.arch.core/common/1.0.0/a2d487452376193fc8c103dd2b9bd5f2b1b44563/common-1.0.0.jar
---------------------------------------------------
output file:/Users/chao.zheng/sunday/OpenSpace/TasksPro/app/build/intermediates/incremental/debug-mergeJavaRes/zip-cache
output file:/Users/chao.zheng/sunday/OpenSpace/TasksPro/app/build/intermediates/transforms/mergeJavaRes/debug

源碼

https://android.googlesource.com/platform/tools/base/+/gradle_3.0.0/build-system/gradle-core/src/main/java/com/android/build/gradle/internal/transforms/MergeJavaResourcesTransform.java

主要代碼邏輯

實際上和前一個task transformNativeLibsWithMergeJniLibsForDebug復用的是一套邏輯，只不過在merge的時候一個是lib類型，一個是resource類型。這個task就是將相應依賴的jar里面的resource合并到intermediates/transforms/mergeJavaRes/debug目錄。但是有一點需要注意，merge java resource時會有些文件時默認不會執(zhí)行merge操作的，如下：

public PackagingOptions() {
        // ATTENTION - keep this in sync with JavaDoc above.
        exclude("/META-INF/LICENSE");
        exclude("/META-INF/LICENSE.txt");
        exclude("/META-INF/MANIFEST.MF");
        exclude("/META-INF/NOTICE");
        exclude("/META-INF/NOTICE.txt");
        exclude("/META-INF/*.DSA");
        exclude("/META-INF/*.EC");
        exclude("/META-INF/*.SF");
        exclude("/META-INF/*.RSA");
        exclude("/META-INF/maven/**");
        exclude("/NOTICE");
        exclude("/NOTICE.txt");
        exclude("/LICENSE.txt");
        exclude("/LICENSE");
        // Exclude version control folders.
        exclude("**/.svn/**");
        exclude("**/CVS/**");
        exclude("**/SCCS/**");
        // Exclude hidden and backup files.
        exclude("**/.*/**");
        exclude("**/.*");
        exclude("**/*~");
        // Exclude index files
        exclude("**/thumbs.db");
        exclude("**/picasa.ini");
        // Exclude javadoc files
        exclude("**/about.html");
        exclude("**/package.html");
        exclude("**/overview.html");
        // Exclude stuff for unknown reasons
        exclude("**/_*");
        exclude("**/_*/**");
        // Merge services
        merge("/META-INF/services/**");
    }

以上的配置是默認不會執(zhí)行merge操作的。當然這里gradle也提供了一些其他的配置如：

packagingOptions {
    merge ""
    exclude ""
    pickFirsts ""
}

validateSigningDebug

源碼

https://android.googlesource.com/platform/tools/base/+/gradle_3.0.0/build-system/gradle-core/src/main/java/com/android/build/gradle/internal/tasks/ValidateSigningTask.java

主要代碼邏輯

看下這個類的注視

/**
 * A validate task that creates the debug keystore if it's missing. It only creates it if it's in
 * the default debug keystore location.
 *
 * It's linked to a given SigningConfig
 */

通過注視可以很明確的知道，這個task就是在沒有keystore時創(chuàng)建一個keystore，也就是在debug的時候，會使用默認的keystore，這也是為什么在debug模式下，沒有配置keystore時，apk仍然能夠安裝使用。

packageDebug

勝利在望，接下來分析最后一個task.

執(zhí)行命令：./gradlew packageDebug

inputs&outputs

input file:/Users/chao.zheng/sunday/OpenSpace/TasksPro/app/build/intermediates/assets/debug
input file:/Users/chao.zheng/sunday/OpenSpace/TasksPro/app/build/intermediates/transforms/dexMerger/debug/0
input file:/Users/chao.zheng/sunday/OpenSpace/TasksPro/app/build/intermediates/transforms/mergeJavaRes/debug/0.jar
input file:/Users/chao.zheng/sunday/OpenSpace/TasksPro/app/build/intermediates/transforms/mergeJniLibs/debug/0
input file:/Users/chao.zheng/sunday/OpenSpace/TasksPro/app/build/intermediates/manifests/full/debug
input file:/Users/chao.zheng/sunday/OpenSpace/TasksPro/app/build/intermediates/res/debug
input file:/Users/chao.zheng/.android/debug.keystore
---------------------------------------------------
output file:/Users/chao.zheng/sunday/OpenSpace/TasksPro/app/build/intermediates/incremental/packageDebug
output file:/Users/chao.zheng/sunday/OpenSpace/TasksPro/app/build/outputs/apk/debug

分析下輸入目錄：

1、assets/debugassets目錄下的文件；

2、dexMerger/debug/0dex 文件；

3、mergeJavaRes/debug/0.jar java resource 文件；

4、mergeJniLibs/debug/0 so文件；

5、manifests/full/debugmanifest文件；

6、res/debugresources 文件；

7、debug.keystore keystore 文件；

輸出文件即為apk文件。

所以packageDebug任務就是打apk包的。

源碼

https://android.googlesource.com/platform/tools/base/+/gradle_3.0.0/build-system/gradle-core/src/main/java/com/android/build/gradle/tasks/PackageAndroidArtifact.java

主要代碼邏輯

    /**
     * Packages the application incrementally. In case of instant run packaging, this is not a
     * perfectly incremental task as some files are always rewritten even if no change has occurred.
     *
     * @param apkData the split being built
     * @param outputFile expected output package file
     * @param changedDex incremental dex packaging data
     * @param changedJavaResources incremental java resources
     * @param changedAssets incremental assets
     * @param changedAndroidResources incremental Android resource
     * @param changedNLibs incremental native libraries changed
     * @throws IOException failed to package the APK
     */
    private void doTask(
            @NonNull ApkData apkData,
            @NonNull File incrementalDirForSplit,
            @NonNull File outputFile,
            @NonNull FileCacheByPath cacheByPath,
            @NonNull Collection<BuildOutput> manifestOutputs,
            @NonNull ImmutableMap<RelativeFile, FileStatus> changedDex,
            @NonNull ImmutableMap<RelativeFile, FileStatus> changedJavaResources,
            @NonNull ImmutableMap<RelativeFile, FileStatus> changedAssets,
            @NonNull ImmutableMap<RelativeFile, FileStatus> changedAndroidResources,
            @NonNull ImmutableMap<RelativeFile, FileStatus> changedNLibs)
            throws IOException {

        ImmutableMap.Builder<RelativeFile, FileStatus> javaResourcesForApk =
                ImmutableMap.builder();
        javaResourcesForApk.putAll(changedJavaResources);

        
        final ImmutableMap<RelativeFile, FileStatus> dexFilesToPackage = changedDex;

        ...

        // 1、創(chuàng)建packager 對象
        try (IncrementalPackager packager =
                new IncrementalPackagerBuilder()
                        .withOutputFile(outputFile)
                        .withSigning(signingConfig)
                        .withCreatedBy(getBuilder().getCreatedBy())
                        .withMinSdk(getMinSdkVersion())
                        // TODO: allow extra metadata to be saved in the split scope to avoid
                        // reparsing
                        // these manifest files.
                        .withNativeLibraryPackagingMode(
                                PackagingUtils.getNativeLibrariesLibrariesPackagingMode(
                                        manifestForSplit.getOutputFile()))
                        .withNoCompressPredicate(
                                PackagingUtils.getNoCompressPredicate(
                                        aaptOptionsNoCompress, manifestForSplit.getOutputFile()))
                        .withIntermediateDir(incrementalDirForSplit)
                        .withProject(getProject())
                        .withDebuggableBuild(getDebugBuild())
                        .withAcceptedAbis(
                                abiFilter == null ? abiFilters : ImmutableSet.of(abiFilter))
                        .withJniDebuggableBuild(getJniDebugBuild())
                        .build()) {
            // 2、更新package相應的內(nèi)容
            packager.updateDex(dexFilesToPackage);
            packager.updateJavaResources(changedJavaResources);
            packager.updateAssets(changedAssets);
            packager.updateAndroidResources(changedAndroidResources);
            packager.updateNativeLibraries(changedNLibs);
            ...
    }

代碼也很簡單就是創(chuàng)建IncrementalPackager 對象packager，然后對dex、javares、assets、AndroidResources、NativeLib執(zhí)行更新操作，也就是寫入操作。執(zhí)行這些update操作，最終都是調(diào)用了IncrementalPackager種的update()方法。代碼如下：

    /**
     * Updates files in the archive.
     *
     * @param updates the updates to perform
     * @throws IOException failed to update the archive
     */
    private void updateFiles(@NonNull Set<PackagedFileUpdate> updates) throws IOException {
        ...

        for (File arch : Sets.newHashSet(archives)) {
            mApkCreator.writeZip(arch, pathNameMap::get, name -> !names.contains(name));
        }
    }

看最后一句mApkCreator.writeZip(),上面的update操作，都通過mAplCreator寫入了Apk包中。

至此在debug模式下生成apk的所有tasks都已經(jīng)分析完畢。對系列文章能看到這里來的，我相信對這個android的編譯過程基本有了比較清晰的認識了。
基本的編譯過程分析完了，后續(xù)將再此系列文章基礎上再出兩個主體：1、《Gradle tool 3.0 增量編譯》；2、《MutilDex拆分過程詳細解析》。

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Android gradle打包涉及task源碼解析（六）

Android gradle打包涉及task源碼解析（六）

文章序號

mergeDebugJniLibFolders

transformNativeLibsWithMergeJniLibsForDebug

transformResourcesWithMergeJavaResForDebug

validateSigningDebug

packageDebug

相關閱讀更多精彩內(nèi)容

友情鏈接更多精彩內(nèi)容

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Android gradle打包涉及task源碼解析（六）

文章序號

mergeDebugJniLibFolders

transformNativeLibsWithMergeJniLibsForDebug

transformResourcesWithMergeJavaResForDebug

validateSigningDebug

packageDebug

相關閱讀更多精彩內(nèi)容

友情鏈接更多精彩內(nèi)容

色偷偷精品伊人,欧洲久久精品,欧美综合婷婷骚逼,国产AV主播,国产最新探花在线,九色在线视频一区,伊人大交九欧美,1769亚洲,黄色成人av