废话不说,直接贴代码。
public static String getApkSignatureMD5(Context context, String apkPath) throws Exception {
String sign = null;
Class clazz = Class.forName("android.content.pm.PackageParser");
Object packageParser = getParserObject(clazz);
Object packag = getPackage(context, clazz, packageParser, apkPath);
Method collectCertificatesMethod = clazz.getMethod("collectCertificates", Class.forName("android.content.pm.PackageParser$Package"), int.class);
collectCertificatesMethod.invoke(packageParser, packag, PackageManager.GET_SIGNATURES);
Signature mSignatures[] = (Signature[]) packag.getClass().getField("mSignatures").get(packag);
System.out.println("size:" + mSignatures.length);
Signature apkSignature = mSignatures.length > 0 ? mSignatures[0] : null;
if (apkSignature != null) {
sign = StringUtils.md5(apkSignature.toByteArray());
}
System.out.println("sign:" + sign);
return sign;
}
private static Object getParserObject(Class clazz) throws InstantiationException, IllegalAccessException, IllegalArgumentException, InvocationTargetException, NoSuchMethodException {
return Build.VERSION.SDK_INT >= 21 ?
clazz.getConstructor().newInstance() :
clazz.getConstructor(String.class).newInstance("");
}
private static Object getPackage(Context c, Class clazz, Object instance, String path) throws Exception {
Object pkg = null;
if (Build.VERSION.SDK_INT >= 21) {
Method method = clazz.getMethod("parsePackage", File.class, int.class);
pkg = method.invoke(instance, new File(path) ,0x0004);
} else {
Method method = clazz.getMethod("parsePackage", File.class, String.class, DisplayMetrics.class, int.class);
pkg = method.invoke(instance, new File(path), null, c.getResources().getDisplayMetrics(), 0x0004);
}
return pkg;
}