java 读取apk签名信息_获取APK签名

importandroid.content.Context;importandroid.content.pm.PackageInfo;importandroid.content.pm.PackageManager;importandroid.content.pm.Signature;importandroid.os.Build;importandroid.util.DisplayMetrics;importjava.io.File;importjava.io.UnsupportedEncodingException;importjava.lang.reflect.Constructor;importjava.lang.reflect.Field;importjava.lang.reflect.Method;importjava.security.MessageDigest;importjava.security.NoSuchAlgorithmException;importjava.util.Iterator;importjava.util.List;/* apk 签名工具类*/

public classSignUtils {/* 获取未安装Apk的签名

*

*@paramapkPath

*@return

*/

public staticString getApkSignature(String apkPath) {

String PATH_PackageParser= “android.content.pm.PackageParser”;try{//apk包的文件路径//这是一个Package 解释器, 是隐藏的//构造函数的参数只有一个, apk文件的路径

Class> pkgParserCls =Class.forName(PATH_PackageParser);

Class>[] typeArgs = new Class[1];

typeArgs[0] = String.class;

Object[] valueArgs= new Object[1];

valueArgs[0] =apkPath;

Object pkgParser;if (Build.VERSION.SDK_INT > 19) {

pkgParser=pkgParserCls.newInstance();

}else{

Constructor constructor=pkgParserCls.getConstructor(typeArgs);

pkgParser=constructor.newInstance(valueArgs);

}//这个是与显示有关的, 里面涉及到一些像素显示等等, 我们使用默认的情况

DisplayMetrics metrics = newDisplayMetrics();

metrics.setToDefaults();//PackageParser.Package mPkgInfo = packageParser.parsePackage(new//File(apkPath), apkPath,//metrics, 0);

Object pkgParserPkg = null;if (Build.VERSION.SDK_INT > 19) {

valueArgs= new Object[2];

valueArgs[0] = newFile(apkPath);

valueArgs[1] =PackageManager.GET_SIGNATURES;

Method pkgParser_parsePackageMtd=pkgParserCls.getDeclaredMethod(“parsePackage”, typeArgs);

pkgParser_parsePackageMtd.setAccessible(true);

typeArgs= new Class[2];

typeArgs[0] = File.class;

typeArgs[1] = int.class;

pkgParserPkg=pkgParser_parsePackageMtd.invoke(pkgParser,

valueArgs);

}else{

typeArgs= new Class[4];

typeArgs[0] = File.class;

typeArgs[1] = String.class;

typeArgs[2] = DisplayMetrics.class;

typeArgs[3] = int.class;

Method pkgParser_parsePackageMtd=pkgParserCls.getDeclaredMethod(“parsePackage”, typeArgs);

pkgParser_parsePackageMtd.setAccessible(true);

valueArgs= new Object[4];

valueArgs[0] = newFile(apkPath);

valueArgs[1] =apkPath;

valueArgs[2] =metrics;

valueArgs[3] =PackageManager.GET_SIGNATURES;

pkgParserPkg=pkgParser_parsePackageMtd.invoke(pkgParser,

valueArgs);

}

typeArgs= new Class[2];

typeArgs[0] =pkgParserPkg.getClass();

typeArgs[1] = int.class;

Method pkgParser_collectCertificatesMtd= pkgParserCls.getDeclaredMethod(“collectCertificates”, typeArgs);

valueArgs= new Object[2];

valueArgs[0] =pkgParserPkg;

valueArgs[1] =PackageManager.GET_SIGNATURES;

pkgParser_collectCertificatesMtd.invoke(pkgParser, valueArgs);//应用程序信息包, 这个公开的, 不过有些函数, 变量没公开

Field packageInfoFld =pkgParserPkg.getClass().getDeclaredField(“mSignatures”);

Signature[] info=(Signature[]) packageInfoFld.get(pkgParserPkg);return info[0].toCharsString();

}catch(Exception e) {

e.printStackTrace();

}return null;

}/* 获取已安装apk签名

*

*@paramcontext

*@parampackageName

*@return

*/

public staticString getInstallPackageSignature(Context context,

String packageName) {

PackageManager pm=context.getPackageManager();

List apps =pm

.getInstalledPackages(PackageManager.GET_SIGNATURES);

Iterator iter =apps.iterator();while(iter.hasNext()) {

PackageInfo packageinfo=iter.next();

String thisName=packageinfo.packageName;if(thisName.equals(packageName)) {return packageinfo.signatures[0].toCharsString();

}

}return null;

}public staticString md5(String string) {byte[] hash;try{

hash= MessageDigest.getInstance(“MD5”).digest(string.getBytes(“UTF-8”));

}catch(NoSuchAlgorithmException e) {throw new RuntimeException(“Huh, MD5 should be supported?”, e);

}catch(UnsupportedEncodingException e) {throw new RuntimeException(“Huh, UTF-8 should be supported?”, e);

}

StringBuilder hex= new StringBuilder(hash.length * 2);for (byteb : hash) {if ((b & 0xFF) < 0x10) hex.append("0");

hex.append(Integer.toHexString(b& 0xFF));

}returnhex.toString();

}

}