How to Prompt User to Enter Pin in Android Lock Screen?

Question

Android screen lock/ unlock programmatically

and

How to lock/unlock phone programmatically : Android

and many questions i have searched for answer b

Answer 1

You can use the below code to open password/pin/pattern screen and validate user device credentials:

if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.LOLLIPOP) {
    KeyguardManager km = (KeyguardManager) getSystemService(KEYGUARD_SERVICE);

    if (km.isKeyguardSecure()) {
        Intent authIntent = km.createConfirmDeviceCredentialIntent(getString(R.string.dialog_title_auth), getString(R.string.dialog_msg_auth));
        startActivityForResult(authIntent, INTENT_AUTHENTICATE);
    }
}

and also implement onActivityResult's method to get the results in your case is successful or not.

// call back when password is correct  
@Override  
protected void onActivityResult(int requestCode, int resultCode, Intent data) {  
    if (requestCode == INTENT_AUTHENTICATE) {  
        if (resultCode == RESULT_OK) {  
            //do something you want when pass the security  
        }  
    }  
}

You can check ref URL from here