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/*
* Copyright (C) 2015 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.settings.applications;
import android.content.Context;
import android.content.pm.ApplicationInfo;
import android.content.pm.PackageInfo;
import android.content.pm.PackageManager;
import android.content.pm.PackageManager.NameNotFoundException;
import android.content.pm.PermissionInfo;
import android.os.Build;
import android.util.ArrayMap;
import android.util.Log;
import java.util.ArrayList;
import java.util.List;
/**
* Based off from
* packages/apps/PackageInstaller/src/com/android/packageinstaller/permission/AppPermissions.java
* Except we only care about the number rather than the details.
*/
public final class AppPermissions {
private static final String TAG = "AppPermissions";
private final ArrayMap<String, PermissionGroup> mGroups = new ArrayMap<>();
private final Context mContext;
private final PackageInfo mPackageInfo;
public AppPermissions(Context context, String packageName) {
mContext = context;
mPackageInfo = getPackageInfo(packageName);
refresh();
}
private PackageInfo getPackageInfo(String packageName) {
try {
return mContext.getPackageManager().getPackageInfo(packageName,
PackageManager.GET_PERMISSIONS);
} catch (NameNotFoundException e) {
Log.e(TAG, "Unable to find " + packageName, e);
return null;
}
}
public void refresh() {
if (mPackageInfo != null) {
loadPermissionGroups();
}
}
public int getPermissionCount() {
return mGroups.size();
}
public int getGrantedPermissionsCount() {
int ct = 0;
for (int i = 0; i < mGroups.size(); i++) {
if (mGroups.valueAt(i).areRuntimePermissionsGranted()) {
ct++;
}
}
return ct;
}
private void loadPermissionGroups() {
mGroups.clear();
if (mPackageInfo.requestedPermissions == null) {
return;
}
final boolean appSupportsRuntimePermissions = appSupportsRuntime(
mPackageInfo.applicationInfo);
for (int i = 0; i < mPackageInfo.requestedPermissions.length; i++) {
String requestedPerm = mPackageInfo.requestedPermissions[i];
final PermissionInfo permInfo;
try {
permInfo = mContext.getPackageManager().getPermissionInfo(requestedPerm, 0);
} catch (NameNotFoundException e) {
Log.w(TAG, "Unknown permission: " + requestedPerm);
continue;
}
String permName = permInfo.name;
String groupName = permInfo.group != null ? permInfo.group : permName;
PermissionGroup group = mGroups.get(groupName);
if (group == null) {
group = new PermissionGroup();
mGroups.put(groupName, group);
}
final boolean runtime = appSupportsRuntimePermissions
&& permInfo.protectionLevel == PermissionInfo.PROTECTION_DANGEROUS;
final boolean granted = (mPackageInfo.requestedPermissionsFlags[i]
& PackageInfo.REQUESTED_PERMISSION_GRANTED) != 0;
Permission permission = new Permission(runtime, granted);
group.addPermission(permission, permName);
}
// Only care about runtime perms for now.
for (int i = mGroups.size() - 1; i >= 0; i--) {
if (!mGroups.valueAt(i).mHasRuntimePermissions) {
mGroups.removeAt(i);
}
}
}
public static boolean appSupportsRuntime(ApplicationInfo info) {
return info.targetSdkVersion > Build.VERSION_CODES.LOLLIPOP_MR1;
}
private static final class PermissionGroup {
private final ArrayMap<String, Permission> mPermissions = new ArrayMap<>();
private boolean mHasRuntimePermissions;
public boolean hasRuntimePermissions() {
return mHasRuntimePermissions;
}
public boolean areRuntimePermissionsGranted() {
final int permissionCount = mPermissions.size();
for (int i = 0; i < permissionCount; i++) {
Permission permission = mPermissions.valueAt(i);
if (permission.runtime && !permission.granted) {
return false;
}
}
return true;
}
public List<Permission> getPermissions() {
return new ArrayList<>(mPermissions.values());
}
void addPermission(Permission permission, String permName) {
mPermissions.put(permName, permission);
if (permission.runtime) {
mHasRuntimePermissions = true;
}
}
}
private static final class Permission {
private final boolean runtime;
private boolean granted;
public Permission(boolean runtime, boolean granted) {
this.runtime = runtime;
this.granted = granted;
}
}
}
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