FillCallback.java revision 3461d3c069468e176fab6bc8b8e78c8e6bc81e8b 
1/*
2 * Copyright (C) 2016 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17package android.service.autofill;
18
19import static android.service.autofill.AutoFillService.DEBUG;
20
21import android.annotation.Nullable;
22import android.app.Activity;
23import android.os.Bundle;
24import android.os.RemoteException;
25import android.util.Log;
26import android.view.autofill.FillResponse;
27
28import com.android.internal.util.Preconditions;
29
30/**
31 * Handles auto-fill requests from the {@link AutoFillService} into the {@link Activity} being
32 * auto-filled.
33 */
34public final class FillCallback {
35
36    private static final String TAG = "FillCallback";
37
38    private final IAutoFillServerCallback mCallback;
39
40    private boolean mReplied = false;
41
42    /** @hide */
43    FillCallback(IAutoFillServerCallback callback) {
44        mCallback = callback;
45    }
46
47    /**
48     * Notifies the Android System that an
49     * {@link AutoFillService#onFillRequest(android.app.assist.AssistStructure, Bundle, android.os.CancellationSignal, FillCallback)}
50     * was successfully fulfilled by the service.
51     *
52     * @param response auto-fill information for that activity, or {@code null} when the activity
53     * cannot be auto-filled (for example, if it only contains read-only fields).
54     *
55     * @throws RuntimeException if an error occurred while calling the Android System.
56     */
57    public void onSuccess(@Nullable FillResponse response) {
58        if (DEBUG) Log.d(TAG, "onSuccess(): respose=" + response);
59
60        checkNotRepliedYet();
61
62        try {
63            mCallback.showResponse(response);
64        } catch (RemoteException e) {
65            e.rethrowAsRuntimeException();
66        }
67    }
68
69    /**
70     * Notifies the Android System that an
71     * {@link AutoFillService#onFillRequest(android.app.assist.AssistStructure, Bundle, android.os.CancellationSignal, FillCallback)}
72     * could not be fulfilled by the service.
73     *
74     * @param message error message to be displayed to the user.
75     *
76     * @throws RuntimeException if an error occurred while calling the Android System.
77     */
78    public void onFailure(CharSequence message) {
79        if (DEBUG) Log.d(TAG, "onFailure(): message=" + message);
80
81        checkNotRepliedYet();
82        Preconditions.checkArgument(message != null, "message cannot be null");
83
84        try {
85            mCallback.showError(message.toString());
86        } catch (RemoteException e) {
87            e.rethrowAsRuntimeException();
88        }
89    }
90
91    // There can be only one!!
92    private void checkNotRepliedYet() {
93        Preconditions.checkState(!mReplied, "already replied");
94        mReplied = true;
95    }
96}
97