src/com/android/settings/applications/autofill/AutofillPickerTrampolineActivity.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.android.settings.applications.autofill;

import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.autofill.AutofillManager;

import com.android.settings.applications.defaultapps.DefaultAutofillPicker;

/**
 * Standalone activity used to launch a {@link DefaultAutofillPicker} fragment from a
 * {@link android.provider.Settings#ACTION_REQUEST_SET_AUTOFILL_SERVICE} intent.
 *
 * <p>It first check for cases that can fail fast, then forward to {@link AutofillPickerActivity}
 * if necessary.
 */
public class AutofillPickerTrampolineActivity extends Activity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        // First check if the current user's service already belongs to the app...
        final Intent intent = getIntent();
        final String packageName = intent.getData().getSchemeSpecificPart();
        final String currentService = DefaultAutofillPicker.getDefaultKey(this);
        if (currentService != null && currentService.startsWith(packageName)) {
            // ...and succeed right away if it does.
            setResult(RESULT_OK);
            finish();
            return;
        }

        // Then check if the Autofill is available for the current user...
        final AutofillManager afm = getSystemService(AutofillManager.class);
        if (afm == null || !afm.hasAutofillFeature() || !afm.isAutofillSupported()) {
            // ... and fail right away if it is not.
            setResult(RESULT_CANCELED);
            finish();
            return;
        }

        // Otherwise, go ahead and show the real UI...
        final Intent newIntent = new Intent(this, AutofillPickerActivity.class)
                .setFlags(Intent.FLAG_ACTIVITY_FORWARD_RESULT)
                .setData(intent.getData());
        startActivity(newIntent);
        finish();
    }
}