| /* |
| * 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 android.slice; |
| |
| import android.Manifest.permission; |
| import android.content.ContentProvider; |
| import android.content.ContentResolver; |
| import android.content.ContentValues; |
| import android.database.ContentObserver; |
| import android.database.Cursor; |
| import android.net.Uri; |
| import android.os.Bundle; |
| import android.os.CancellationSignal; |
| import android.os.Handler; |
| import android.os.Looper; |
| import android.util.Log; |
| |
| import java.util.concurrent.CountDownLatch; |
| |
| /** |
| * A SliceProvider allows app to provide content to be displayed in system |
| * spaces. This content is templated and can contain actions, and the behavior |
| * of how it is surfaced is specific to the system surface. |
| * |
| * <p>Slices are not currently live content. They are bound once and shown to the |
| * user. If the content changes due to a callback from user interaction, then |
| * {@link ContentResolver#notifyChange(Uri, ContentObserver)} |
| * should be used to notify the system.</p> |
| * |
| * <p>The provider needs to be declared in the manifest to provide the authority |
| * for the app. The authority for most slices is expected to match the package |
| * of the application.</p> |
| * <pre class="prettyprint"> |
| * {@literal |
| * <provider |
| * android:name="com.android.mypkg.MySliceProvider" |
| * android:authorities="com.android.mypkg" />} |
| * </pre> |
| * |
| * @see Slice |
| * @hide |
| */ |
| public abstract class SliceProvider extends ContentProvider { |
| |
| private static final String TAG = "SliceProvider"; |
| /** |
| * @hide |
| */ |
| public static final String EXTRA_BIND_URI = "slice_uri"; |
| /** |
| * @hide |
| */ |
| public static final String METHOD_SLICE = "bind_slice"; |
| /** |
| * @hide |
| */ |
| public static final String EXTRA_SLICE = "slice"; |
| |
| private static final boolean DEBUG = false; |
| |
| /** |
| * Implemented to create a slice. Will be called on the main thread. |
| * @see {@link Slice}. |
| */ |
| public abstract Slice onBindSlice(Uri sliceUri); |
| |
| @Override |
| public final int update(Uri uri, ContentValues values, String selection, |
| String[] selectionArgs) { |
| if (DEBUG) Log.d(TAG, "update " + uri); |
| return 0; |
| } |
| |
| @Override |
| public final int delete(Uri uri, String selection, String[] selectionArgs) { |
| if (DEBUG) Log.d(TAG, "delete " + uri); |
| return 0; |
| } |
| |
| @Override |
| public final Cursor query(Uri uri, String[] projection, String selection, |
| String[] selectionArgs, String sortOrder) { |
| if (DEBUG) Log.d(TAG, "query " + uri); |
| return null; |
| } |
| |
| @Override |
| public final Cursor query(Uri uri, String[] projection, String selection, String[] |
| selectionArgs, String sortOrder, CancellationSignal cancellationSignal) { |
| if (DEBUG) Log.d(TAG, "query " + uri); |
| return null; |
| } |
| |
| @Override |
| public final Cursor query(Uri uri, String[] projection, Bundle queryArgs, |
| CancellationSignal cancellationSignal) { |
| if (DEBUG) Log.d(TAG, "query " + uri); |
| return null; |
| } |
| |
| @Override |
| public final Uri insert(Uri uri, ContentValues values) { |
| if (DEBUG) Log.d(TAG, "insert " + uri); |
| return null; |
| } |
| |
| @Override |
| public final String getType(Uri uri) { |
| if (DEBUG) Log.d(TAG, "getType " + uri); |
| return null; |
| } |
| |
| @Override |
| public final Bundle call(String method, String arg, Bundle extras) { |
| if (method.equals(METHOD_SLICE)) { |
| getContext().enforceCallingPermission(permission.BIND_SLICE, |
| "Slice binding requires the permission BIND_SLICE"); |
| Uri uri = extras.getParcelable(EXTRA_BIND_URI); |
| |
| Slice s = handleBindSlice(uri); |
| Bundle b = new Bundle(); |
| b.putParcelable(EXTRA_SLICE, s); |
| return b; |
| } |
| return super.call(method, arg, extras); |
| } |
| |
| private Slice handleBindSlice(Uri sliceUri) { |
| Slice[] output = new Slice[1]; |
| CountDownLatch latch = new CountDownLatch(1); |
| Handler mainHandler = new Handler(Looper.getMainLooper()); |
| mainHandler.post(() -> { |
| output[0] = onBindSlice(sliceUri); |
| latch.countDown(); |
| }); |
| try { |
| latch.await(); |
| return output[0]; |
| } catch (InterruptedException e) { |
| throw new RuntimeException(e); |
| } |
| } |
| } |