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/*
* Copyright (C) 2017 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.example.android.autofillframework.app
import android.content.Context
import android.content.Intent
import android.os.Bundle
import android.support.v7.app.AppCompatActivity
import android.util.Log
import android.view.View
import android.view.autofill.AutofillManager
import android.widget.ArrayAdapter
import android.widget.AutoCompleteTextView
import android.widget.Toast
import com.example.android.autofillframework.CommonUtil.TAG
import com.example.android.autofillframework.R
import kotlinx.android.synthetic.main.login_with_autocomplete_activity.clear
import kotlinx.android.synthetic.main.login_with_autocomplete_activity.login
import kotlinx.android.synthetic.main.login_with_autocomplete_activity.passwordField
import kotlinx.android.synthetic.main.login_with_autocomplete_activity.usernameField
class StandardAutoCompleteSignInActivity : AppCompatActivity() {
private var autofillReceived = false
private lateinit var autofillCallback: AutofillManager.AutofillCallback
private lateinit var autofillManager: AutofillManager
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setContentView(R.layout.login_with_autocomplete_activity)
login.setOnClickListener { submitLogin() }
clear.setOnClickListener { resetFields() }
autofillCallback = MyAutofillCallback()
autofillManager = getSystemService(AutofillManager::class.java)
val mockAutocompleteAdapter = ArrayAdapter.createFromResource(this, R.array.mock_autocomplete_sign_in_suggestions,
android.R.layout.simple_dropdown_item_1line)
usernameField.setAdapter(mockAutocompleteAdapter)
}
override fun onResume() {
super.onResume()
autofillManager.registerCallback(autofillCallback)
}
override fun onPause() {
super.onPause()
autofillManager.unregisterCallback(autofillCallback)
}
private fun resetFields() {
usernameField.setText("")
passwordField.setText("")
}
/**
* Emulates a login action.
*/
private fun submitLogin() {
val username = usernameField.text.toString()
val password = passwordField.text.toString()
val valid = isValidCredentials(username, password)
if (valid) {
val intent = WelcomeActivity.getStartActivityIntent(this@StandardAutoCompleteSignInActivity)
startActivity(intent)
finish()
} else {
Toast.makeText(this, "Authentication failed.", Toast.LENGTH_SHORT).show()
}
}
/**
* Fake implementation for demo purposes. A real service should use secure mechanisms to
* authenticate users.
*/
fun isValidCredentials(username: String?, password: String?): Boolean {
return username != null && password != null && username == password
}
private inner class MyAutofillCallback : AutofillManager.AutofillCallback() {
override fun onAutofillEvent(view: View, event: Int) {
super.onAutofillEvent(view, event)
if (view is AutoCompleteTextView) {
when (event) {
AutofillManager.AutofillCallback.EVENT_INPUT_UNAVAILABLE,
AutofillManager.AutofillCallback.EVENT_INPUT_HIDDEN -> {
if (!autofillReceived) {
view.showDropDown()
}
}
AutofillManager.AutofillCallback.EVENT_INPUT_SHOWN -> {
autofillReceived = true
view.setAdapter(null)
}
else -> Log.d(TAG, "Unexpected callback: " + event)
}
}
}
}
companion object {
fun getStartActivityIntent(context: Context): Intent {
val intent = Intent(context, StandardAutoCompleteSignInActivity::class.java)
return intent
}
}
}
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