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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.autofill.app.commoncases;
import android.content.Context;
import android.content.Intent;
import android.os.Bundle;
import android.support.annotation.NonNull;
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.TextView;
import android.widget.Toast;
import com.example.android.autofill.app.R;
import com.example.android.autofill.app.WelcomeActivity;
import static com.example.android.autofill.app.Util.TAG;
public class StandardAutoCompleteSignInActivity extends AppCompatActivity {
private AutoCompleteTextView mUsernameAutoCompleteField;
private TextView mPasswordField;
private TextView mLoginButton;
private TextView mClearButton;
private boolean mAutofillReceived = false;
private AutofillManager.AutofillCallback mAutofillCallback;
private AutofillManager mAutofillManager;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.login_with_autocomplete_activity);
mLoginButton = findViewById(R.id.login);
mClearButton = findViewById(R.id.clear);
mUsernameAutoCompleteField = findViewById(R.id.usernameField);
mPasswordField = findViewById(R.id.passwordField);
mLoginButton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
login();
}
});
mClearButton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
AutofillManager afm = getSystemService(AutofillManager.class);
if (afm != null) {
afm.cancel();
}
resetFields();
}
});
mAutofillCallback = new MyAutofillCallback();
mAutofillManager = getSystemService(AutofillManager.class);
ArrayAdapter<CharSequence> mockAutocompleteAdapter = ArrayAdapter.createFromResource
(this, R.array.mock_autocomplete_sign_in_suggestions,
android.R.layout.simple_dropdown_item_1line);
mUsernameAutoCompleteField.setAdapter(mockAutocompleteAdapter);
}
@Override
protected void onResume() {
super.onResume();
mAutofillManager.registerCallback(mAutofillCallback);
}
@Override
protected void onPause() {
super.onPause();
mAutofillManager.unregisterCallback(mAutofillCallback);
}
private void resetFields() {
mUsernameAutoCompleteField.setText("");
mPasswordField.setText("");
}
/**
* Emulates a login action.
*/
private void login() {
String username = mUsernameAutoCompleteField.getText().toString();
String password = mPasswordField.getText().toString();
boolean valid = isValidCredentials(username, password);
if (valid) {
Intent intent = WelcomeActivity.getStartActivityIntent(StandardAutoCompleteSignInActivity.this);
startActivity(intent);
finish();
} else {
Toast.makeText(this, "Authentication failed.", Toast.LENGTH_SHORT).show();
}
}
/**
* Placeholder implementation for demo purposes. A real service should use secure mechanisms to
* authenticate users.
*/
public boolean isValidCredentials(String username, String password) {
return username != null && password != null && username.equals(password);
}
private class MyAutofillCallback extends AutofillManager.AutofillCallback {
@Override
public void onAutofillEvent(@NonNull View view, int event) {
if (view instanceof AutoCompleteTextView) {
switch (event) {
case AutofillManager.AutofillCallback.EVENT_INPUT_UNAVAILABLE:
// no break on purpose
case AutofillManager.AutofillCallback.EVENT_INPUT_HIDDEN:
if (!mAutofillReceived) {
((AutoCompleteTextView) view).showDropDown();
}
break;
case AutofillManager.AutofillCallback.EVENT_INPUT_SHOWN:
mAutofillReceived = true;
((AutoCompleteTextView) view).setAdapter(null);
break;
default:
Log.d(TAG, "Unexpected callback: " + event);
}
}
}
}
}
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