Main.java Source code

Introduction

Here is the source code for Main.java

Source

//package com.java2s;
//License from project: Apache License 

import java.io.File;
import java.io.IOException;
import java.lang.reflect.Method;
import java.lang.reflect.InvocationTargetException;
import android.content.res.XmlResourceParser;
import android.content.res.AssetManager;

public class Main {
    /**
     * Tries to get the parser for the given apkFile from {@link AssetManager}
     * using undocumented API which is marked as
     * "not to be used by applications"
     *
     * @throws IOException
     */
    private static XmlResourceParser getParserForManifest(final File APKFILE) throws IOException {
        final Object ASSETMANAGERINSTANCE = getAssetManager();
        final int COOKIE = addAssets(APKFILE, ASSETMANAGERINSTANCE);
        return ((AssetManager) ASSETMANAGERINSTANCE).openXmlResourceParser(COOKIE, "AndroidManifest.xml");
    }

    /**
     * Get {@link AssetManager} using reflection
     */
    private static Object getAssetManager() {
        Class assetManagerClass = null;
        try {
            assetManagerClass = Class.forName("android.content.res.AssetManager");
            return assetManagerClass.newInstance();
        } catch (ClassNotFoundException e) {
            e.printStackTrace();
        } catch (InstantiationException e) {
            e.printStackTrace();
        } catch (IllegalAccessException e) {
            e.printStackTrace();
        }

        return null;
    }

    /**
     * Get the cookie of an asset using an undocumented API call that is marked
     * as "no to be used by applications" in its source code
     * 
     * @see <a href="http://androidxref.com/5.1.1_r6/xref/frameworks/base/core/java/android/content/res/AssetManager.java#612">AssetManager.java#612</a>
     * @return the cookie
     */
    private static int addAssets(final File APKFILE, final Object ASSETMANAGERINSTANCE) {
        try {
            Method addAssetPath = ASSETMANAGERINSTANCE.getClass().getMethod("addAssetPath",
                    new Class[] { String.class });
            return (Integer) addAssetPath.invoke(ASSETMANAGERINSTANCE, APKFILE.getAbsolutePath());
        } catch (NoSuchMethodException e) {
            e.printStackTrace();
        } catch (InvocationTargetException e) {
            e.printStackTrace();
        } catch (IllegalAccessException e) {
            e.printStackTrace();
        }

        return -1;
    }
}