prebuilts/gradle/AutofillFramework/Application/src/main/java/com/example/android/autofillframework/app/CreditCardSpinnersActivity.java

/*
 * 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.view.View;
import android.view.autofill.AutofillManager;
import android.widget.ArrayAdapter;
import android.widget.EditText;
import android.widget.Spinner;

import com.example.android.autofillframework.R;

import java.util.Calendar;

public class CreditCardSpinnersActivity extends AppCompatActivity {

    private static final int CC_EXP_YEARS_COUNT = 5;

    private final String[] years = new String[CC_EXP_YEARS_COUNT];

    private Spinner mCcExpirationDaySpinner;
    private Spinner mCcExpirationMonthSpinner;
    private Spinner mCcExpirationYearSpinner;
    private EditText mCcCardNumber;
    private EditText mCcSecurityCode;

    public static Intent getStartActivityIntent(Context context) {
        Intent intent = new Intent(context, CreditCardSpinnersActivity.class);
        return intent;
    }

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.credit_card_spinners_activity);
        mCcExpirationDaySpinner = findViewById(R.id.expirationDay);
        mCcExpirationMonthSpinner = findViewById(R.id.expirationMonth);
        mCcExpirationYearSpinner = findViewById(R.id.expirationYear);
        mCcCardNumber = findViewById(R.id.creditCardNumberField);
        mCcSecurityCode = findViewById(R.id.creditCardSecurityCode);

        // Create an ArrayAdapter using the string array and a default spinner layout
        ArrayAdapter<CharSequence> dayAdapter = ArrayAdapter.createFromResource
                (this, R.array.day_array, android.R.layout.simple_spinner_item);
        // Specify the layout to use when the list of choices appears
        dayAdapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
        // Apply the adapter to the spinner
        mCcExpirationDaySpinner.setAdapter(dayAdapter);

        /*
        R.array.month_array could be an array of Strings like "Jan", "Feb", "March", etc., and
        the AutofillService would know how to autofill it. However, for the sake of keeping the
        AutofillService simple, we will stick to a list of numbers (1, 2, ... 12) to represent
        months; it makes it much easier to generate fake autofill data in the service that can still
        autofill this spinner.
        */
        ArrayAdapter<CharSequence> monthAdapter = ArrayAdapter.createFromResource(
                this, R.array.month_array, android.R.layout.simple_spinner_item);
        // Adapter created from resource has getAutofillOptions() implemented by default.
        monthAdapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
        mCcExpirationMonthSpinner.setAdapter(monthAdapter);

        int year = Calendar.getInstance().get(Calendar.YEAR);
        for (int i = 0; i < years.length; i++) {
            years[i] = Integer.toString(year + i);
        }
        // Since the years Spinner uses a custom adapter, it needs to implement getAutofillOptions.
        mCcExpirationYearSpinner.setAdapter(
                new ArrayAdapter<String>(this, android.R.layout.simple_spinner_item, years) {
                    @Override
                    public CharSequence[] getAutofillOptions() {
                        return years;
                    }
                });
        findViewById(R.id.submit).setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                submit();
            }
        });
        findViewById(R.id.clear).setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                getSystemService(AutofillManager.class).cancel();
                resetFields();
            }
        });
    }

    private void resetFields() {
        mCcExpirationDaySpinner.setSelection(0);
        mCcExpirationMonthSpinner.setSelection(0);
        mCcExpirationYearSpinner.setSelection(0);
        mCcCardNumber.setText("");
        mCcSecurityCode.setText("");
    }

    /**
     * Launches new Activity and finishes, triggering an autofill save request if the user entered
     * any new data.
     */
    private void submit() {
        Intent intent = WelcomeActivity.getStartActivityIntent(CreditCardSpinnersActivity.this);
        startActivity(intent);
        finish();
    }
}