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Diffstat (limited to 'android/content/pm/PackageList.java')
-rw-r--r-- | android/content/pm/PackageList.java | 74 |
1 files changed, 74 insertions, 0 deletions
diff --git a/android/content/pm/PackageList.java b/android/content/pm/PackageList.java new file mode 100644 index 00000000..cfd99abc --- /dev/null +++ b/android/content/pm/PackageList.java @@ -0,0 +1,74 @@ +/* + * 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.content.pm; + +import android.annotation.NonNull; +import android.annotation.Nullable; +import android.content.pm.PackageManagerInternal.PackageListObserver; + +import com.android.server.LocalServices; + +import java.util.List; + +/** + * All of the package name installed on the system. + * <p>A self observable list that automatically removes the listener when it goes out of scope. + * + * @hide Only for use within the system server. + */ +public class PackageList implements PackageListObserver, AutoCloseable { + private final PackageListObserver mWrappedObserver; + private final List<String> mPackageNames; + + /** + * Create a new object. + * <p>Ownership of the given {@link List} transfers to this object and should not + * be modified by the caller. + */ + public PackageList(@NonNull List<String> packageNames, @Nullable PackageListObserver observer) { + mPackageNames = packageNames; + mWrappedObserver = observer; + } + + @Override + public void onPackageAdded(String packageName) { + if (mWrappedObserver != null) { + mWrappedObserver.onPackageAdded(packageName); + } + } + + @Override + public void onPackageRemoved(String packageName) { + if (mWrappedObserver != null) { + mWrappedObserver.onPackageRemoved(packageName); + } + } + + @Override + public void close() throws Exception { + LocalServices.getService(PackageManagerInternal.class).removePackageListObserver(this); + } + + /** + * Returns the names of packages installed on the system. + * <p>The list is a copy-in-time and the actual set of installed packages may differ. Real + * time updates to the package list are sent via the {@link PackageListObserver} callback. + */ + public @NonNull List<String> getPackageNames() { + return mPackageNames; + } +} |