MainDexList产生过程源码分析

//build-system/gradle-core/src/main/groovy/com/android/build/gradle/internal/tasks/multidex/CreateMainDexList.groovy @Override void execute(CreateMainDexList createMainDexList) {     createMainDexList.androidBuilder = scope.globalScope.androidBuilder     createMainDexList.setVariantName(scope.getVariantConfiguration().getFullName())      def files = inputFiles     createMainDexList.allClassesJarFile = files.call().first()     ConventionMappingHelper.map(createMainDexList, "componentsJarFile") {         scope.getProguardComponentsJarFile()     }     createMainDexList.mainDexListFile = scope.manifestKeepListFile     createMainDexList.outputFile = scope.getMainDexListFile() }  @TaskAction void output() {     if (getAllClassesJarFile() == null) {         throw new NullPointerException("No input file")     }      // manifest components plus immediate dependencies must be in the main dex.     File _allClassesJarFile = getAllClassesJarFile()     Set<String> mainDexClasses = callDx(_allClassesJarFile, getComponentsJarFile())      // add additional classes specified via a jar file.     File _includeInMainDexJarFile = getIncludeInMainDexJarFile()     if (_includeInMainDexJarFile != null) {         mainDexClasses.addAll(callDx(_allClassesJarFile, _includeInMainDexJarFile))     }      if (mainDexListFile != null) {         Set<String> mainDexList = new HashSet<String>(Files.readLines(mainDexListFile, Charsets.UTF_8))         mainDexClasses.addAll(mainDexList)     }      String fileContent = Joiner.on(System.getProperty("line.separator")).join(mainDexClasses)      Files.write(fileContent, getOutputFile(), Charsets.UTF_8) } 

@Override void execute(CreateManifestKeepList manifestKeepListTask) {         manifestKeepListTask.setVariantName(scope.getVariantConfiguration().getFullName())          // since all the output have the same manifest, besides the versionCode,         // we can take any of the output and use that.         final BaseVariantOutputData output = scope.variantData.outputs.get(0)         ConventionMappingHelper.map(manifestKeepListTask, "manifest") {             output.getScope().getManifestOutputFile()         }          manifestKeepListTask.proguardFile = scope.variantConfiguration.getMultiDexKeepProguard()         manifestKeepListTask.outputFile = scope.getManifestKeepListFile();          //variant.ext.collectMultiDexComponents = manifestKeepListTask     }      @TaskAction void generateKeepListFromManifest() {     SAXParser parser = SAXParserFactory.newInstance().newSAXParser()      Writer out = new BufferedWriter(new FileWriter(getOutputFile()))     try {         parser.parse(getManifest(), new ManifestHandler(out))          // add a couple of rules that cannot be easily parsed from the manifest.         out.write(             """-keep public class * extends android.app.backup.BackupAgent {                 <init>();             }             -keep public class * extends java.lang.annotation.Annotation {                 *;             }         """)          if (proguardFile != null) {             out.write(Files.toString(proguardFile, Charsets.UTF_8))         }     } finally {         out.close()     } }  private static String DEFAULT_KEEP_SPEC = "{ <init>(); }" private static Map<String, String> KEEP_SPECS = [     'application'       : """{                         <init>();         void attachBaseContext(android.content.Context);     }""",     'activity'          : DEFAULT_KEEP_SPEC,     'service'           : DEFAULT_KEEP_SPEC,     'receiver'          : DEFAULT_KEEP_SPEC,     'provider'          : DEFAULT_KEEP_SPEC,     'instrumentation'   : DEFAULT_KEEP_SPEC, ]  private class ManifestHandler extends DefaultHandler {     private Writer out      ManifestHandler(Writer out) {         this.out = out     }      @Override     void startElement(String uri, String localName, String qName, Attributes attr) {         String keepSpec = (String)CreateManifestKeepList.KEEP_SPECS[qName]         if (keepSpec) {              boolean keepIt = true             if (CreateManifestKeepList.this.filter) {                 // for ease of use, turn 'attr' into a simple map                 Map<String, String> attrMap = [:]                 for (int i = 0; i < attr.getLength(); i++) {                     attrMap[attr.getQName(i)] = attr.getValue(i)                 }                 keepIt = CreateManifestKeepList.this.filter(qName, attrMap)             }              if (keepIt) {                 out.write((String)"-keep class ${attr.getValue('android:name')} $keepSpec/n")             }         }     } } 

{     <init>();     void attachBaseContext(android.content.Context); } 

{ <init>(); } 

-keep public class * extends android.app.backup.BackupAgent {     <init>(); } -keep public class * extends java.lang.annotation.Annotation {     *; } 

//build-system/gradle-core/src/main/groovy/com/android/build/gradle/tasks/factory/ProGuardTaskConfigAction.java @Override public void execute(ProGuardTask proguardComponentsTask) {     proguardComponentsTask.dontobfuscate();     proguardComponentsTask.dontoptimize();     proguardComponentsTask.dontpreverify();     proguardComponentsTask.dontwarn();     proguardComponentsTask.forceprocessing();      try {         proguardComponentsTask.configuration(scope.getManifestKeepListFile());          proguardComponentsTask.libraryjars(new Callable<File>() {             @Override             public File call() throws Exception {                 Preconditions.checkNotNull(                         scope.getGlobalScope().getAndroidBuilder().getTargetInfo());                 File shrinkedAndroid = new File(                         scope.getGlobalScope().getAndroidBuilder().getTargetInfo()                                 .getBuildTools()                                 .getLocation(),                         "lib" + File.separatorChar + "shrinkedAndroid.jar");                  // TODO remove in 1.0                 // STOPSHIP                 if (!shrinkedAndroid.isFile()) {                     shrinkedAndroid = new File(                             scope.getGlobalScope().getAndroidBuilder().getTargetInfo()                                     .getBuildTools().getLocation(),                             "multidex" + File.separatorChar + "shrinkedAndroid.jar");                 }                  return shrinkedAndroid;             }         });          proguardComponentsTask.injars(new Callable<File>() {             @Override             public File call() throws Exception {                 return inputFiles.call().iterator().next();             }         });          proguardComponentsTask.outjars(scope.getProguardComponentsJarFile());          proguardComponentsTask.printconfiguration(                 scope.getGlobalScope().getBuildDir() + "/" + FD_INTERMEDIATES                         + "/multi-dex/" + scope.getVariantConfiguration().getDirName()                         + "/components.flags");     } catch (ParseException e) {         throw new RuntimeException(e);     } catch (IOException e) {         throw new RuntimeException(e);     } }  //external/proguard/src/proguard/gradle/ProGuardTask.java @TaskAction public void proguard() throws ParseException, IOException {     // Let the logging manager capture the standard output and errors from     // ProGuard.     LoggingManager loggingManager = getLogging();     loggingManager.captureStandardOutput(LogLevel.INFO);     loggingManager.captureStandardError(LogLevel.WARN);      // Run ProGuard with the collected configuration.     new ProGuard(getConfiguration()).execute();  }