[print keyhash] Code to quickly print the signing keyhash (sometimes useful for getting api keys) #android

PrintKeyHash.java

    public static String printKeyHash(Activity context) {
    	PackageInfo packageInfo;
    	String key = null;
    	try {
    		//getting application package name, as defined in manifest
    		String packageName = context.getApplicationContext().getPackageName();
    
    		//Retriving package info
    		packageInfo = context.getPackageManager().getPackageInfo(packageName,
    				PackageManager.GET_SIGNATURES);
    			
    		Log.e("Package Name=", context.getApplicationContext().getPackageName());
    		
    		for (Signature signature : packageInfo.signatures) {
    			MessageDigest md = MessageDigest.getInstance("SHA");
    			md.update(signature.toByteArray());
    			key = new String(Base64.encode(md.digest(), 0));
    		
    			// String key = new String(Base64.encodeBytes(md.digest()));
    			Log.e("Key Hash=", key);
    		}
    	} catch (NameNotFoundException e1) {
    		Log.e("Name not found", e1.toString());
    	}
    	catch (NoSuchAlgorithmException e) {
    		Log.e("No such an algorithm", e.toString());
    	} catch (Exception e) {
    		Log.e("Exception", e.toString());
    	}
    
    	return key;
    }