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/*
* Copyright (C) 2016 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.permissionpresenterservice;
import android.annotation.SystemApi;
import android.app.Service;
import android.content.Context;
import android.content.Intent;
import android.content.pm.permission.IRuntimePermissionPresenter;
import android.content.pm.permission.RuntimePermissionPresentationInfo;
import android.content.pm.permission.RuntimePermissionPresenter;
import android.os.Bundle;
import android.os.Handler;
import android.os.IBinder;
import android.os.Looper;
import android.os.Message;
import android.os.RemoteCallback;
import com.android.internal.os.SomeArgs;
import java.util.List;
/**
* This service presents information regarding runtime permissions that is
* used for presenting them in the UI. Runtime permissions are presented as
* a single permission in the UI but may be composed of several individual
* permissions.
*
* @see RuntimePermissionPresenter
* @see RuntimePermissionPresentationInfo
*
* @hide
*/
@SystemApi
public abstract class RuntimePermissionPresenterService extends Service {
/**
* The {@link Intent} action that must be declared as handled by a service
* in its manifest for the system to recognize it as a runtime permission
* presenter service.
*/
public static final String SERVICE_INTERFACE =
"android.permissionpresenterservice.RuntimePermissionPresenterService";
// No need for locking - always set first and never modified
private Handler mHandler;
@Override
public final void attachBaseContext(Context base) {
super.attachBaseContext(base);
mHandler = new MyHandler(base.getMainLooper());
}
/**
* Gets the runtime permissions for an app.
*
* @param packageName The package for which to query.
*/
public abstract List<RuntimePermissionPresentationInfo> onGetAppPermissions(String packageName);
/**
* Revoke the permission {@code permissionName} for app {@code packageName}
*
* @param packageName The package for which to revoke
* @param permissionName The permission to revoke
*
* @hide
*/
public abstract void onRevokeRuntimePermission(String packageName, String permissionName);
@Override
public final IBinder onBind(Intent intent) {
return new IRuntimePermissionPresenter.Stub() {
@Override
public void getAppPermissions(String packageName, RemoteCallback callback) {
SomeArgs args = SomeArgs.obtain();
args.arg1 = packageName;
args.arg2 = callback;
mHandler.obtainMessage(MyHandler.MSG_GET_APP_PERMISSIONS,
args).sendToTarget();
}
@Override
public void revokeRuntimePermission(String packageName, String permissionName) {
SomeArgs args = SomeArgs.obtain();
args.arg1 = packageName;
args.arg2 = permissionName;
mHandler.obtainMessage(MyHandler.MSG_REVOKE_APP_PERMISSION,
args).sendToTarget();
}
};
}
private final class MyHandler extends Handler {
public static final int MSG_GET_APP_PERMISSIONS = 1;
public static final int MSG_GET_APPS_USING_PERMISSIONS = 2;
public static final int MSG_REVOKE_APP_PERMISSION = 3;
public MyHandler(Looper looper) {
super(looper, null, false);
}
@Override
public void handleMessage(Message msg) {
switch (msg.what) {
case MSG_GET_APP_PERMISSIONS: {
SomeArgs args = (SomeArgs) msg.obj;
String packageName = (String) args.arg1;
RemoteCallback callback = (RemoteCallback) args.arg2;
args.recycle();
List<RuntimePermissionPresentationInfo> permissions =
onGetAppPermissions(packageName);
if (permissions != null && !permissions.isEmpty()) {
Bundle result = new Bundle();
result.putParcelableList(RuntimePermissionPresenter.KEY_RESULT,
permissions);
callback.sendResult(result);
} else {
callback.sendResult(null);
}
} break;
case MSG_REVOKE_APP_PERMISSION: {
SomeArgs args = (SomeArgs) msg.obj;
String packageName = (String) args.arg1;
String permissionName = (String) args.arg2;
args.recycle();
onRevokeRuntimePermission(packageName, permissionName);
} break;
}
}
}
}
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