Android Multidex列出所有类

Question

我想使用ApplicationWrapepr方法在我的应用程序中使用multidex,如此处所述https://plus.google.com/104023661970539138053/posts/YTMf8ADTcFg

我使用了--minimal-main-dex选项以及这样的keep文件:

android/support/multidex/ZipUtil.class
android/support/multidex/ZipUtil$CentralDirectory.class
android/support/multidex/MultiDex$V14.class
android/support/multidex/MultiDexExtractor$1.class
android/support/multidex/MultiDexExtractor.class
com/<mypackage>/common/MyApplication.class
com/<mypackage>/common/MyApplicationWrapper.class
com/<mypackage>/common/ui/DashboardActivity.class
android/support/multidex/MultiDexApplication.class
android/support/multidex/MultiDex.class
android/support/multidex/MultiDex$V19.class
android/support/multidex/MultiDex$V4.class

这导致我的主dex文件中列出的类是可以的.我使用一个使用以下代码的库来列出dexfile中的所有类,但只获取主"clesses.dex"的条目,而不是所有其他加载的dex文件的条目,因为新的DexFile只检查"classes.dex" :

private static List<String> getPaths(final String[] sourcePaths) {
    List<String> result = new ArrayList<String>();

    for (String s : sourcePaths) {
      try {
        DexFile dexfile = new DexFile(s);
        Enumeration<String> entries = dexfile.entries();

        while (entries.hasMoreElements()) {
          result.add(entries.nextElement());
        }
      } catch (IOException ioe) {
        Log.w(TAG, "cannot open file=" + s + ";Exception=" + ioe.getMessage());
      }
    }

    return result;
}

现在的单一路径通过以下方式确定:

application.getApplicationContext().getApplicationInfo().sourceDir;

结果像/data/../myapplicationname.apk

还有另一种可能性来列出dex文件中的所有类吗？或者目前在ClassLoaders中的所有课程？该库对项目至关重要,并使用此方法稍后通过反射查找组件实现.

EDIT1: 如果发现classes2.dex文件位于:/data/data/com./code_cache/secondary-dexes/com.-1.apk.classes2.dex

但是当使用带有此路径的新DexFile()时,将抛出IOEsxception,并显示消息"无法打开dexfile".

Answer 1

DexFile接受zip/apk文件的路径,并提取它以查找.dex文件.因此,如果您使用.dex作为路径,则会引发错误.

此外,Google发布了一篇文章" 使用超过65K方法构建应用程序"来解决 - 多重问题.

我写了一个类来加载所有类.您可以在以下网址阅读更多信息:http://xudshen.info/2014/11/12/list-all-classes-after-multidex/

import android.content.Context;
import android.content.SharedPreferences;
import android.content.pm.ApplicationInfo;
import android.content.pm.PackageManager;
import android.os.Build;

import java.io.File;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Enumeration;
import java.util.List;

import dalvik.system.DexFile;

/**
 * Created by xudshen@hotmail.com on 14/11/13.
 */
public class MultiDexHelper {
    private static final String EXTRACTED_NAME_EXT = ".classes";
    private static final String EXTRACTED_SUFFIX = ".zip";

    private static final String SECONDARY_FOLDER_NAME = "code_cache" + File.separator +
            "secondary-dexes";

    private static final String PREFS_FILE = "multidex.version";
    private static final String KEY_DEX_NUMBER = "dex.number";

    private static SharedPreferences getMultiDexPreferences(Context context) {
        return context.getSharedPreferences(PREFS_FILE,
                Build.VERSION.SDK_INT < Build.VERSION_CODES.HONEYCOMB
                        ? Context.MODE_PRIVATE
                        : Context.MODE_PRIVATE | Context.MODE_MULTI_PROCESS);
    }

    /**
     * get all the dex path
     *
     * @param context the application context
     * @return all the dex path
     * @throws PackageManager.NameNotFoundException
     * @throws IOException
     */
    public static List<String> getSourcePaths(Context context) throws PackageManager.NameNotFoundException, IOException {
        ApplicationInfo applicationInfo = context.getPackageManager().getApplicationInfo(context.getPackageName(), 0);
        File sourceApk = new File(applicationInfo.sourceDir);
        File dexDir = new File(applicationInfo.dataDir, SECONDARY_FOLDER_NAME);

        List<String> sourcePaths = new ArrayList<String>();
        sourcePaths.add(applicationInfo.sourceDir); //add the default apk path

        //the prefix of extracted file, ie: test.classes
        String extractedFilePrefix = sourceApk.getName() + EXTRACTED_NAME_EXT;
        //the total dex numbers
        int totalDexNumber = getMultiDexPreferences(context).getInt(KEY_DEX_NUMBER, 1);

        for (int secondaryNumber = 2; secondaryNumber <= totalDexNumber; secondaryNumber++) {
            //for each dex file, ie: test.classes2.zip, test.classes3.zip...
            String fileName = extractedFilePrefix + secondaryNumber + EXTRACTED_SUFFIX;
            File extractedFile = new File(dexDir, fileName);
            if (extractedFile.isFile()) {
                sourcePaths.add(extractedFile.getAbsolutePath());
                //we ignore the verify zip part
            } else {
                throw new IOException("Missing extracted secondary dex file '" +
                        extractedFile.getPath() + "'");
            }
        }

        return sourcePaths;
    }

    /**
     * get all the classes name in "classes.dex", "classes2.dex", ....
     *
     * @param context the application context
     * @return all the classes name
     * @throws PackageManager.NameNotFoundException
     * @throws IOException
     */
    public static List<String> getAllClasses(Context context) throws PackageManager.NameNotFoundException, IOException {
        List<String> classNames = new ArrayList<String>();
        for (String path : getSourcePaths(context)) {
            try {
                DexFile dexfile = null;
                if (path.endsWith(EXTRACTED_SUFFIX)) {
                    //NOT use new DexFile(path), because it will throw "permission error in /data/dalvik-cache"
                    dexfile = DexFile.loadDex(path, path + ".tmp", 0);
                } else {
                    dexfile = new DexFile(path);
                }
                Enumeration<String> dexEntries = dexfile.entries();
                while (dexEntries.hasMoreElements()) {
                    classNames.add(dexEntries.nextElement());
                }
            } catch (IOException e) {
                throw new IOException("Error at loading dex file '" +
                        path + "'");
            }
        }
        return classNames;
    }
}