Android 应用现在到处都是，如果下载一个apk , 不借助与其他工具，你能得到这个应用的版本号，包名入口等信息吗。其实我们完全可以自己写段 java 代码来得到这些信息。下面是测试代码:程序代码package com.read.apk;import java.io.File;import java.io.FileOutputStream;import java.io.IOException;import java.io.InputStream;import java.io.OutputStream;import java.util.Enumeration;import java.util.zip.ZipEntry;import java.util.zip.ZipFile;import org.xmlpull.v1.XmlPullParser;import android.content.res.AXmlResourceParser;import android.util.TypedValue;/*** 分析APK文件，取得APK文件中的 包名、版本号及图标*/public class AnalysisApk {    /**     * 解压 zip 文件(apk可以当成一个zip文件)，注意不能解压 rar 文件哦，只能解压 zip 文件 解压 rar 文件 会出现     * java.io.IOException: Negative seek offset 异常 create date:2009- 6- 9     * author:Administrator     *     * @param apkUrl     * zip 文件，注意要是正宗的 zip 文件哦，不能是把 rar 的直接改为 zip 这样会出现     * java.io.IOException: Negative seek offset 异常     * @param logoUrl     * 图标生成的地址     * @throws IOException     */    public static String[] unZip(String apkUrl, String logoUrl) {        // [0]:版本号;[1]包名        String[] st = new String[2];        byte b[] = new byte[1024];        int length;        ZipFile zipFile;        try {            zipFile = new ZipFile(new File(apkUrl));            Enumeration enumeration = zipFile.entries();            ZipEntry zipEntry = null;            while (enumeration.hasMoreElements()) {                zipEntry = (ZipEntry) enumeration.nextElement();                if (zipEntry.isDirectory()) {                } else {                    if ("AndroidManifest.xml".equals(zipEntry.getName())) {                        try {                            AXmlResourceParser parser = new AXmlResourceParser();                            parser.open(zipFile.getInputStream(zipEntry));                            while (true) {                                int type = parser.next();                                if (type == XmlPullParser.END_DOCUMENT) {                                    break;                                }                                switch (type) {                                case XmlPullParser.START_TAG: {                                    for (int i = 0; i != parser.getAttributeCount(); ++i) {                                        if ("versionName".equals(parser.getAttributeName(i))) {                                            st[0] = getAttributeValue(parser, i);                                        } else if ("package".equals(parser.getAttributeName(i))) {                                            st[1] = getAttributeValue(parser, i);                                        }                                    }                                }                                }                            }                        } catch (Exception e) {                            e.printStackTrace();                        }                    }                    if ("res/drawable-ldpi/icon.png".equals(zipEntry.getName())) {                        OutputStream outputStream = new FileOutputStream(logoUrl);                        InputStream inputStream = zipFile.getInputStream(zipEntry);                        while ((length = inputStream.read(b)) > 0)                            outputStream.write(b, 0, length);                    }                }            }        } catch (IOException e) {        }        return st;    }    private static String getAttributeValue(AXmlResourceParser parser, int index) {        int type = parser.getAttributeValueType(index);        int data = parser.getAttributeValueData(index);        if (type == TypedValue.TYPE_STRING) {            return parser.getAttributeValue(index);        }        if (type == TypedValue.TYPE_ATTRIBUTE) {            return String.format("?%s%08X", getPackage(data), data);        }        if (type == TypedValue.TYPE_REFERENCE) {            return String.format("@%s%08X", getPackage(data), data);        }        if (type == TypedValue.TYPE_FLOAT) {            return String.valueOf(Float.intBitsToFloat(data));        }        if (type == TypedValue.TYPE_INT_HEX) {            return String.format("0x%08X", data);        }        if (type == TypedValue.TYPE_INT_BOOLEAN) {            return data != 0 ? "true" : "false";        }        if (type == TypedValue.TYPE_DIMENSION) {            return Float.toString(complexToFloat(data)) + DIMENSION_UNITS[data & TypedValue.COMPLEX_UNIT_MASK];        }        if (type == TypedValue.TYPE_FRACTION) {            return Float.toString(complexToFloat(data)) + FRACTION_UNITS[data & TypedValue.COMPLEX_UNIT_MASK];        }        if (type >= TypedValue.TYPE_FIRST_COLOR_INT && type <= TypedValue.TYPE_LAST_COLOR_INT) {            return String.format("#%08X", data);        }        if (type >= TypedValue.TYPE_FIRST_INT && type <= TypedValue.TYPE_LAST_INT) {            return String.valueOf(data);        }        return String.format("<0x%X, type 0x%02X>", data, type);    }    private static String getPackage(int id) {        if (id >>> 24 == 1) {            return "android:";        }        return "";    }    // ///////////////////////////////// ILLEGAL STUFF, DONT LOOK :)    public static float complexToFloat(int complex) {        return (float) (complex & 0xFFFFFF00) * RADIX_MULTS[(complex >> 4) & 3];    }    private static final float RADIX_MULTS[] = { 0.00390625F, 3.051758E-005F, 1.192093E-007F, 4.656613E-010F };    private static final String DIMENSION_UNITS[] = { "px", "dip", "sp", "pt", "in", "mm", "", "" };    private static final String FRACTION_UNITS[] = { "%", "%p", "", "", "", "", "", "" };}测试主程序程序代码package com.read.apk;public class ReadApk {    public static void main(String[] args) {        String path = "./src//com//read//apk//baidushurufa.apk";        String[] messag = AnalysisApk.unZip(path, "E://11");        System.out.println(messag[0] + "-------->" + messag[1]);    }}注意下路径就可以了，改成自己的apk的路径.