565 lines
21 KiB
Java
565 lines
21 KiB
Java
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/*
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* Copyright (C) 2017 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package android.app.slice;
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import static android.app.slice.Slice.SUBTYPE_COLOR;
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import android.annotation.NonNull;
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import android.app.PendingIntent;
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import android.content.ComponentName;
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import android.content.ContentProvider;
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import android.content.ContentResolver;
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import android.content.ContentValues;
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import android.content.Context;
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import android.content.Intent;
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import android.content.IntentFilter;
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import android.content.pm.PackageManager;
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import android.content.pm.PackageManager.NameNotFoundException;
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import android.content.pm.ProviderInfo;
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import android.database.ContentObserver;
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import android.database.Cursor;
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import android.graphics.drawable.Icon;
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import android.net.Uri;
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import android.os.Binder;
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import android.os.Bundle;
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import android.os.CancellationSignal;
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import android.os.Handler;
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import android.os.Process;
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import android.os.StrictMode;
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import android.os.StrictMode.ThreadPolicy;
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import android.util.ArraySet;
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import android.util.Log;
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import android.util.TypedValue;
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import android.view.ContextThemeWrapper;
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import java.util.ArrayList;
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import java.util.Arrays;
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import java.util.Collection;
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import java.util.Collections;
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import java.util.List;
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import java.util.Set;
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/**
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* A SliceProvider allows an app to provide content to be displayed in system spaces. This content
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* is templated and can contain actions, and the behavior of how it is surfaced is specific to the
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* system surface.
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* <p>
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* Slices are not currently live content. They are bound once and shown to the user. If the content
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* changes due to a callback from user interaction, then
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* {@link ContentResolver#notifyChange(Uri, ContentObserver)} should be used to notify the system.
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* </p>
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* <p>
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* The provider needs to be declared in the manifest to provide the authority for the app. The
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* authority for most slices is expected to match the package of the application.
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* </p>
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*
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* <pre class="prettyprint">
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* {@literal
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* <provider
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* android:name="com.example.mypkg.MySliceProvider"
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* android:authorities="com.example.mypkg" />}
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* </pre>
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* <p>
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* Slices can be identified by a Uri or by an Intent. To link an Intent with a slice, the provider
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* must have an {@link IntentFilter} matching the slice intent. When a slice is being requested via
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* an intent, {@link #onMapIntentToUri(Intent)} can be called and is expected to return an
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* appropriate Uri representing the slice.
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*
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* <pre class="prettyprint">
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* {@literal
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* <provider
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* android:name="com.example.mypkg.MySliceProvider"
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* android:authorities="com.example.mypkg">
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* <intent-filter>
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* <action android:name="com.example.mypkg.intent.action.MY_SLICE_INTENT" />
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* <category android:name="android.app.slice.category.SLICE" />
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* </intent-filter>
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* </provider>}
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* </pre>
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*
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* @see Slice
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* @deprecated Slice framework has been deprecated, it will not receive any updates from
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* {@link android.os.Build.VANILLA_ICE_CREAM} and forward. If you are looking for a
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* framework that sends displayable data from one app to another, consider using
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* {@link android.app.appsearch.AppSearchManager}.
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*/
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@Deprecated
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public abstract class SliceProvider extends ContentProvider {
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/**
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* This is the Android platform's MIME type for a URI
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* containing a slice implemented through {@link SliceProvider}.
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*/
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public static final String SLICE_TYPE = "vnd.android.slice";
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private static final String TAG = "SliceProvider";
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/**
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* @hide
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*/
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public static final String EXTRA_BIND_URI = "slice_uri";
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/**
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* @hide
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*/
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public static final String EXTRA_SUPPORTED_SPECS = "supported_specs";
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/**
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* @hide
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*/
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public static final String METHOD_SLICE = "bind_slice";
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/**
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* @hide
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*/
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public static final String METHOD_MAP_INTENT = "map_slice";
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/**
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* @hide
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*/
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public static final String METHOD_MAP_ONLY_INTENT = "map_only";
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/**
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* @hide
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*/
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public static final String METHOD_PIN = "pin";
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/**
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* @hide
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*/
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public static final String METHOD_UNPIN = "unpin";
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/**
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* @hide
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*/
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public static final String METHOD_GET_DESCENDANTS = "get_descendants";
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/**
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* @hide
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*/
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public static final String METHOD_GET_PERMISSIONS = "get_permissions";
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/**
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* @hide
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*/
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public static final String EXTRA_INTENT = "slice_intent";
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/**
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* @hide
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*/
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public static final String EXTRA_SLICE = "slice";
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/**
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* @hide
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*/
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public static final String EXTRA_SLICE_DESCENDANTS = "slice_descendants";
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/**
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* @hide
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*/
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public static final String EXTRA_PKG = "pkg";
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/**
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* @hide
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*/
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public static final String EXTRA_RESULT = "result";
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private static final boolean DEBUG = false;
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private static final long SLICE_BIND_ANR = 2000;
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private final String[] mAutoGrantPermissions;
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private String mCallback;
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private SliceManager mSliceManager;
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/**
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* A version of constructing a SliceProvider that allows autogranting slice permissions
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* to apps that hold specific platform permissions.
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* <p>
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* When an app tries to bind a slice from this provider that it does not have access to,
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* This provider will check if the caller holds permissions to any of the autoGrantPermissions
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* specified, if they do they will be granted persisted uri access to all slices of this
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* provider.
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*
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* @param autoGrantPermissions List of permissions that holders are auto-granted access
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* to slices.
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*/
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public SliceProvider(@NonNull String... autoGrantPermissions) {
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mAutoGrantPermissions = autoGrantPermissions;
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}
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public SliceProvider() {
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mAutoGrantPermissions = new String[0];
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}
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@Override
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public void attachInfo(Context context, ProviderInfo info) {
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super.attachInfo(context, info);
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mSliceManager = context.getSystemService(SliceManager.class);
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}
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/**
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* Implemented to create a slice.
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* <p>
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* onBindSlice should return as quickly as possible so that the UI tied
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* to this slice can be responsive. No network or other IO will be allowed
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* during onBindSlice. Any loading that needs to be done should happen
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* in the background with a call to {@link ContentResolver#notifyChange(Uri, ContentObserver)}
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* when the app is ready to provide the complete data in onBindSlice.
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* <p>
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* The slice returned should have a spec that is compatible with one of
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* the supported specs.
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*
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* @param sliceUri Uri to bind.
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* @param supportedSpecs List of supported specs.
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* @see Slice
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* @see Slice#HINT_PARTIAL
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*/
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public Slice onBindSlice(Uri sliceUri, Set<SliceSpec> supportedSpecs) {
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return null;
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}
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/**
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* Called to inform an app that a slice has been pinned.
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* <p>
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* Pinning is a way that slice hosts use to notify apps of which slices
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* they care about updates for. When a slice is pinned the content is
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* expected to be relatively fresh and kept up to date.
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* <p>
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* Being pinned does not provide any escalated privileges for the slice
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* provider. So apps should do things such as turn on syncing or schedule
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* a job in response to a onSlicePinned.
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* <p>
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* Pinned state is not persisted through a reboot, and apps can expect a
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* new call to onSlicePinned for any slices that should remain pinned
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* after a reboot occurs.
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*
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* @param sliceUri The uri of the slice being unpinned.
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* @see #onSliceUnpinned(Uri)
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*/
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public void onSlicePinned(Uri sliceUri) {
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}
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/**
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* Called to inform an app that a slices is no longer pinned.
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* <p>
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* This means that no other apps on the device care about updates to this
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* slice anymore and therefore it is not important to be updated. Any syncs
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* or jobs related to this slice should be cancelled.
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* @see #onSlicePinned(Uri)
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*/
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public void onSliceUnpinned(Uri sliceUri) {
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}
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/**
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* Obtains a list of slices that are descendants of the specified Uri.
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* <p>
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* Implementing this is optional for a SliceProvider, but does provide a good
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* discovery mechanism for finding slice Uris.
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*
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* @param uri The uri to look for descendants under.
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* @return All slices within the space.
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* @see SliceManager#getSliceDescendants(Uri)
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*/
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public @NonNull Collection<Uri> onGetSliceDescendants(@NonNull Uri uri) {
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return Collections.emptyList();
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}
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/**
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* This method must be overridden if an {@link IntentFilter} is specified on the SliceProvider.
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* In that case, this method can be called and is expected to return a non-null Uri representing
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* a slice. Otherwise this will throw {@link UnsupportedOperationException}.
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*
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* Any intent filter added to a slice provider should also contain
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* {@link SliceManager#CATEGORY_SLICE}, because otherwise it will not be detected by
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* {@link SliceManager#mapIntentToUri(Intent)}.
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*
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* @return Uri representing the slice associated with the provided intent.
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* @see Slice
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* @see SliceManager#mapIntentToUri(Intent)
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*/
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public @NonNull Uri onMapIntentToUri(Intent intent) {
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throw new UnsupportedOperationException(
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"This provider has not implemented intent to uri mapping");
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}
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/**
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* Called when an app requests a slice it does not have write permission
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* to the uri for.
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* <p>
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* The return value will be the action on a slice that prompts the user that
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* the calling app wants to show slices from this app. The default implementation
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* launches a dialog that allows the user to grant access to this slice. Apps
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* that do not want to allow this user grant, can override this and instead
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* launch their own dialog with different behavior.
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*
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* @param sliceUri the Uri of the slice attempting to be bound.
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* @see #getCallingPackage()
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*/
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public @NonNull PendingIntent onCreatePermissionRequest(Uri sliceUri) {
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return createPermissionPendingIntent(getContext(), sliceUri, getCallingPackage());
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}
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@Override
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public final int update(Uri uri, ContentValues values, String selection,
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String[] selectionArgs) {
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if (DEBUG) Log.d(TAG, "update " + uri);
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return 0;
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}
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@Override
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public final int delete(Uri uri, String selection, String[] selectionArgs) {
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if (DEBUG) Log.d(TAG, "delete " + uri);
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return 0;
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}
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@Override
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public final Cursor query(Uri uri, String[] projection, String selection,
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String[] selectionArgs, String sortOrder) {
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if (DEBUG) Log.d(TAG, "query " + uri);
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return null;
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}
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@Override
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public final Cursor query(Uri uri, String[] projection, String selection, String[]
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selectionArgs, String sortOrder, CancellationSignal cancellationSignal) {
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if (DEBUG) Log.d(TAG, "query " + uri);
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return null;
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}
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@Override
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public final Cursor query(Uri uri, String[] projection, Bundle queryArgs,
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CancellationSignal cancellationSignal) {
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if (DEBUG) Log.d(TAG, "query " + uri);
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return null;
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}
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@Override
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public final Uri insert(Uri uri, ContentValues values) {
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if (DEBUG) Log.d(TAG, "insert " + uri);
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return null;
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}
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@Override
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public final String getType(Uri uri) {
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if (DEBUG) Log.d(TAG, "getType " + uri);
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return SLICE_TYPE;
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}
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@Override
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public Bundle call(String method, String arg, Bundle extras) {
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if (method.equals(METHOD_SLICE)) {
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Uri uri = getUriWithoutUserId(validateIncomingUriOrNull(
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extras.getParcelable(EXTRA_BIND_URI, android.net.Uri.class)));
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List<SliceSpec> supportedSpecs = extras.getParcelableArrayList(EXTRA_SUPPORTED_SPECS, android.app.slice.SliceSpec.class);
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String callingPackage = getCallingPackage();
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int callingUid = Binder.getCallingUid();
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int callingPid = Binder.getCallingPid();
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Slice s = handleBindSlice(uri, supportedSpecs, callingPackage, callingUid, callingPid);
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Bundle b = new Bundle();
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b.putParcelable(EXTRA_SLICE, s);
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return b;
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} else if (method.equals(METHOD_MAP_INTENT)) {
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Intent intent = extras.getParcelable(EXTRA_INTENT, android.content.Intent.class);
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if (intent == null) return null;
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Uri uri = validateIncomingUriOrNull(onMapIntentToUri(intent));
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List<SliceSpec> supportedSpecs = extras.getParcelableArrayList(EXTRA_SUPPORTED_SPECS, android.app.slice.SliceSpec.class);
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Bundle b = new Bundle();
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if (uri != null) {
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Slice s = handleBindSlice(uri, supportedSpecs, getCallingPackage(),
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|
|
Binder.getCallingUid(), Binder.getCallingPid());
|
||
|
|
b.putParcelable(EXTRA_SLICE, s);
|
||
|
|
} else {
|
||
|
|
b.putParcelable(EXTRA_SLICE, null);
|
||
|
|
}
|
||
|
|
return b;
|
||
|
|
} else if (method.equals(METHOD_MAP_ONLY_INTENT)) {
|
||
|
|
Intent intent = extras.getParcelable(EXTRA_INTENT, android.content.Intent.class);
|
||
|
|
if (intent == null) return null;
|
||
|
|
Uri uri = validateIncomingUriOrNull(onMapIntentToUri(intent));
|
||
|
|
Bundle b = new Bundle();
|
||
|
|
b.putParcelable(EXTRA_SLICE, uri);
|
||
|
|
return b;
|
||
|
|
} else if (method.equals(METHOD_PIN)) {
|
||
|
|
Uri uri = getUriWithoutUserId(validateIncomingUriOrNull(
|
||
|
|
extras.getParcelable(EXTRA_BIND_URI, android.net.Uri.class)));
|
||
|
|
if (Binder.getCallingUid() != Process.SYSTEM_UID) {
|
||
|
|
throw new SecurityException("Only the system can pin/unpin slices");
|
||
|
|
}
|
||
|
|
handlePinSlice(uri);
|
||
|
|
} else if (method.equals(METHOD_UNPIN)) {
|
||
|
|
Uri uri = getUriWithoutUserId(validateIncomingUriOrNull(
|
||
|
|
extras.getParcelable(EXTRA_BIND_URI, android.net.Uri.class)));
|
||
|
|
if (Binder.getCallingUid() != Process.SYSTEM_UID) {
|
||
|
|
throw new SecurityException("Only the system can pin/unpin slices");
|
||
|
|
}
|
||
|
|
handleUnpinSlice(uri);
|
||
|
|
} else if (method.equals(METHOD_GET_DESCENDANTS)) {
|
||
|
|
Uri uri = getUriWithoutUserId(
|
||
|
|
validateIncomingUriOrNull(extras.getParcelable(EXTRA_BIND_URI, android.net.Uri.class)));
|
||
|
|
Bundle b = new Bundle();
|
||
|
|
b.putParcelableArrayList(EXTRA_SLICE_DESCENDANTS,
|
||
|
|
new ArrayList<>(handleGetDescendants(uri)));
|
||
|
|
return b;
|
||
|
|
} else if (method.equals(METHOD_GET_PERMISSIONS)) {
|
||
|
|
if (Binder.getCallingUid() != Process.SYSTEM_UID) {
|
||
|
|
throw new SecurityException("Only the system can get permissions");
|
||
|
|
}
|
||
|
|
Bundle b = new Bundle();
|
||
|
|
b.putStringArray(EXTRA_RESULT, mAutoGrantPermissions);
|
||
|
|
return b;
|
||
|
|
}
|
||
|
|
return super.call(method, arg, extras);
|
||
|
|
}
|
||
|
|
|
||
|
|
private Uri validateIncomingUriOrNull(Uri uri) {
|
||
|
|
return uri == null ? null : validateIncomingUri(uri);
|
||
|
|
}
|
||
|
|
|
||
|
|
private Collection<Uri> handleGetDescendants(Uri uri) {
|
||
|
|
mCallback = "onGetSliceDescendants";
|
||
|
|
return onGetSliceDescendants(uri);
|
||
|
|
}
|
||
|
|
|
||
|
|
private void handlePinSlice(Uri sliceUri) {
|
||
|
|
mCallback = "onSlicePinned";
|
||
|
|
Handler.getMain().postDelayed(mAnr, SLICE_BIND_ANR);
|
||
|
|
try {
|
||
|
|
onSlicePinned(sliceUri);
|
||
|
|
} finally {
|
||
|
|
Handler.getMain().removeCallbacks(mAnr);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
private void handleUnpinSlice(Uri sliceUri) {
|
||
|
|
mCallback = "onSliceUnpinned";
|
||
|
|
Handler.getMain().postDelayed(mAnr, SLICE_BIND_ANR);
|
||
|
|
try {
|
||
|
|
onSliceUnpinned(sliceUri);
|
||
|
|
} finally {
|
||
|
|
Handler.getMain().removeCallbacks(mAnr);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
private Slice handleBindSlice(Uri sliceUri, List<SliceSpec> supportedSpecs,
|
||
|
|
String callingPkg, int callingUid, int callingPid) {
|
||
|
|
// This can be removed once Slice#bindSlice is removed and everyone is using
|
||
|
|
// SliceManager#bindSlice.
|
||
|
|
String pkg = callingPkg != null ? callingPkg
|
||
|
|
: getContext().getPackageManager().getNameForUid(callingUid);
|
||
|
|
try {
|
||
|
|
mSliceManager.enforceSlicePermission(sliceUri, callingPid, callingUid,
|
||
|
|
mAutoGrantPermissions);
|
||
|
|
} catch (SecurityException e) {
|
||
|
|
return createPermissionSlice(getContext(), sliceUri, pkg);
|
||
|
|
}
|
||
|
|
mCallback = "onBindSlice";
|
||
|
|
Handler.getMain().postDelayed(mAnr, SLICE_BIND_ANR);
|
||
|
|
try {
|
||
|
|
return onBindSliceStrict(sliceUri, supportedSpecs);
|
||
|
|
} finally {
|
||
|
|
Handler.getMain().removeCallbacks(mAnr);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @hide
|
||
|
|
*/
|
||
|
|
public Slice createPermissionSlice(Context context, Uri sliceUri,
|
||
|
|
String callingPackage) {
|
||
|
|
PendingIntent action;
|
||
|
|
mCallback = "onCreatePermissionRequest";
|
||
|
|
Handler.getMain().postDelayed(mAnr, SLICE_BIND_ANR);
|
||
|
|
try {
|
||
|
|
action = onCreatePermissionRequest(sliceUri);
|
||
|
|
} finally {
|
||
|
|
Handler.getMain().removeCallbacks(mAnr);
|
||
|
|
}
|
||
|
|
Slice.Builder parent = new Slice.Builder(sliceUri, null);
|
||
|
|
Slice.Builder childAction = new Slice.Builder(parent)
|
||
|
|
.addIcon(Icon.createWithResource(context,
|
||
|
|
com.android.internal.R.drawable.ic_permission), null,
|
||
|
|
Collections.emptyList())
|
||
|
|
.addHints(Arrays.asList(Slice.HINT_TITLE, Slice.HINT_SHORTCUT))
|
||
|
|
.addAction(action, new Slice.Builder(parent).build(), null);
|
||
|
|
|
||
|
|
TypedValue tv = new TypedValue();
|
||
|
|
new ContextThemeWrapper(context, android.R.style.Theme_DeviceDefault_Light)
|
||
|
|
.getTheme().resolveAttribute(android.R.attr.colorAccent, tv, true);
|
||
|
|
int deviceDefaultAccent = tv.data;
|
||
|
|
|
||
|
|
Uri subSliceUri = sliceUri.buildUpon().appendPath("permission").build();
|
||
|
|
Slice.Builder subSlice = new Slice.Builder(subSliceUri, null)
|
||
|
|
.addIcon(Icon.createWithResource(context,
|
||
|
|
com.android.internal.R.drawable.ic_arrow_forward), null,
|
||
|
|
Collections.emptyList())
|
||
|
|
.addText(getPermissionString(context, callingPackage), null,
|
||
|
|
Collections.emptyList())
|
||
|
|
.addInt(deviceDefaultAccent, SUBTYPE_COLOR,
|
||
|
|
Collections.emptyList())
|
||
|
|
.addSubSlice(childAction.build(), null);
|
||
|
|
parent.addSubSlice(subSlice.build(), null);
|
||
|
|
return parent.addHints(Arrays.asList(Slice.HINT_PERMISSION_REQUEST)).build();
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @hide
|
||
|
|
*/
|
||
|
|
public static PendingIntent createPermissionPendingIntent(Context context, Uri sliceUri,
|
||
|
|
String callingPackage) {
|
||
|
|
return PendingIntent.getActivity(context, 0,
|
||
|
|
createPermissionIntent(context, sliceUri, callingPackage),
|
||
|
|
PendingIntent.FLAG_IMMUTABLE);
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @hide
|
||
|
|
*/
|
||
|
|
public static Intent createPermissionIntent(Context context, Uri sliceUri,
|
||
|
|
String callingPackage) {
|
||
|
|
Intent intent = new Intent(SliceManager.ACTION_REQUEST_SLICE_PERMISSION);
|
||
|
|
intent.setComponent(ComponentName.unflattenFromString(context.getResources().getString(
|
||
|
|
com.android.internal.R.string.config_slicePermissionComponent)));
|
||
|
|
intent.putExtra(EXTRA_BIND_URI, sliceUri);
|
||
|
|
intent.putExtra(EXTRA_PKG, callingPackage);
|
||
|
|
// Unique pending intent.
|
||
|
|
intent.setData(sliceUri.buildUpon().appendQueryParameter("package", callingPackage)
|
||
|
|
.build());
|
||
|
|
return intent;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @hide
|
||
|
|
*/
|
||
|
|
public static CharSequence getPermissionString(Context context, String callingPackage) {
|
||
|
|
PackageManager pm = context.getPackageManager();
|
||
|
|
try {
|
||
|
|
return context.getString(
|
||
|
|
com.android.internal.R.string.slices_permission_request,
|
||
|
|
pm.getApplicationInfo(callingPackage, 0).loadLabel(pm),
|
||
|
|
context.getApplicationInfo().loadLabel(pm));
|
||
|
|
} catch (NameNotFoundException e) {
|
||
|
|
// This shouldn't be possible since the caller is verified.
|
||
|
|
throw new RuntimeException("Unknown calling app", e);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
private Slice onBindSliceStrict(Uri sliceUri, List<SliceSpec> supportedSpecs) {
|
||
|
|
ThreadPolicy oldPolicy = StrictMode.getThreadPolicy();
|
||
|
|
try {
|
||
|
|
StrictMode.setThreadPolicy(new StrictMode.ThreadPolicy.Builder()
|
||
|
|
.detectAll()
|
||
|
|
.penaltyDeath()
|
||
|
|
.build());
|
||
|
|
return onBindSlice(sliceUri, new ArraySet<>(supportedSpecs));
|
||
|
|
} finally {
|
||
|
|
StrictMode.setThreadPolicy(oldPolicy);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
private final Runnable mAnr = () -> {
|
||
|
|
Process.sendSignal(Process.myPid(), Process.SIGNAL_QUIT);
|
||
|
|
Log.wtf(TAG, "Timed out while handling slice callback " + mCallback);
|
||
|
|
};
|
||
|
|
}
|