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: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

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.