I'm doing the Facebook SDK tutorial for Android and I do not understand this part, which talks about hashes of key to development environments.
Command:
keytool -exportcert -alias androiddebugkey -keystore %HOMEPATH%\.android\debug.keystore | openssl sha1 -binary | openssl
base64
Where should I run this command? I tried CMD but it made a mistake.
Hello, you should tell the path where keytool and openssl are on your computer. In my case you are in:
C: \ Program Files \ Java \ jdk1.8.0_91 \ bin \ keytool.exeC: \ OpenSSL-Win64 \ bin \ openssl.exe
Now just replace, it will look like this:
"C: \ Program Files \ Java \ jdk1.8.0_91 \ bin \ keytool.exe" -exportcert -alias androiddebugkey -keystore% HOMEPATH% .android \ debug.keystore | "C: \ OpenSSL-Win64 \ bin \ openssl.exe" sha1 -binary | "C: \ OpenSSL-Win64 \ bin \ openssl.exe" base64
Once you've done this, you'll need to enter a password, which is android by default.
Ready! Your hash will appear, you should copy everything including the =There are millions of ways to recover this Key Hash.
It serves to identify that only your project is accessing the user's Facebook information as a form of security.
I always broke my mind to recover this key, but I learned a very simple way to do it.
Within the onCreate method, place this code:
try {
PackageInfo info = getPackageManager().getPackageInfo(
getPackageName(),
PackageManager.GET_SIGNATURES);
for (Signature signature : info.signatures) {
MessageDigest md = MessageDigest.getInstance("SHA");
md.update(signature.toByteArray());
Log.d("KeyHash:", Base64.encodeToString(md.digest(), Base64.DEFAULT));
}
}
catch (NameNotFoundException e) {
}
catch (NoSuchAlgorithmException e) {
}
Now run your application, in your LogCat (Android Monitor), will appear a code something like this:
KeyHash: nzM5O1NWEmtflcC3vDK2lx3CwcM=
All these numbers and letters are your Hash Key, including the = sign , then you can put it in the Facebook control panel, so that it recognizes your application.