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/*
* Copyright (C) 2018 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.permissioncontroller.permission.utils;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import androidx.annotation.NonNull;
/**
* Monitors the state of a package (esp. if it gets uninstalled)
*/
public abstract class PackageRemovalMonitor extends BroadcastReceiver {
private final @NonNull Context mContext;
private final @NonNull String mPackageName;
public PackageRemovalMonitor(@NonNull Context context, @NonNull String packageName) {
mContext = context;
mPackageName = packageName;
}
protected abstract void onPackageRemoved();
@Override
public void onReceive(Context context, Intent intent) {
if (Intent.ACTION_PACKAGE_REMOVED.equals(intent.getAction())
&& mPackageName.equals(intent.getData().getSchemeSpecificPart())) {
onPackageRemoved();
}
}
/**
* Enable monitoring
*/
public void register() {
IntentFilter packageRemovedFilter = new IntentFilter();
packageRemovedFilter.addAction(Intent.ACTION_PACKAGE_REMOVED);
packageRemovedFilter.addDataScheme("package");
mContext.registerReceiver(this, packageRemovedFilter);
}
/**
* Disable monitoring
*/
public void unregister() {
mContext.unregisterReceiver(this);
}
}
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