/*
* 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.app.AlertDialog;
import android.app.AppOpsManager;
import android.content.ActivityNotFoundException;
import android.content.Context;
import android.content.Intent;
import android.content.pm.ApplicationInfo;
import android.content.pm.PackageManager;
import android.os.Bundle;
import android.os.UserHandle;
import android.provider.Settings;
import android.support.v14.preference.SwitchPreference;
import android.support.v7.preference.Preference;
import android.support.v7.preference.Preference.OnPreferenceChangeListener;
import android.support.v7.preference.Preference.OnPreferenceClickListener;
import android.util.Log;
import com.android.internal.logging.MetricsProto.MetricsEvent;
import com.android.settings.R;
import com.android.settings.applications.AppStateAppOpsBridge.PermissionState;
import com.android.settings.applications.AppStateWriteSettingsBridge.WriteSettingsState;
import com.android.settingslib.applications.ApplicationsState.AppEntry;
import java.util.List;
public class WriteSettingsDetails extends AppInfoWithHeader implements OnPreferenceChangeListener,
OnPreferenceClickListener {
private static final String KEY_APP_OPS_PREFERENCE_SCREEN = "app_ops_preference_screen";
private static final String KEY_APP_OPS_SETTINGS_SWITCH = "app_ops_settings_switch";
private static final String KEY_APP_OPS_SETTINGS_PREFS = "app_ops_settings_preference";
private static final String KEY_APP_OPS_SETTINGS_DESC = "app_ops_settings_description";
private static final String LOG_TAG = "WriteSettingsDetails";
private static final int [] APP_OPS_OP_CODE = {
AppOpsManager.OP_WRITE_SETTINGS
};
// Use a bridge to get the overlay details but don't initialize it to connect with all state.
// TODO: Break out this functionality into its own class.
private AppStateWriteSettingsBridge mAppBridge;
private AppOpsManager mAppOpsManager;
private SwitchPreference mSwitchPref;
private Preference mWriteSettingsPrefs;
private Preference mWriteSettingsDesc;
private Intent mSettingsIntent;
private WriteSettingsState mWriteSettingsState;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
Context context = getActivity();
mAppBridge = new AppStateWriteSettingsBridge(context, mState, null);
mAppOpsManager = (AppOpsManager) context.getSystemService(Context.APP_OPS_SERVICE);
addPreferencesFromResource(R.xml.app_ops_permissions_details);
mSwitchPref = (SwitchPreference) findPreference(KEY_APP_OPS_SETTINGS_SWITCH);
mWriteSettingsPrefs = findPreference(KEY_APP_OPS_SETTINGS_PREFS);
mWriteSettingsDesc = findPreference(KEY_APP_OPS_SETTINGS_DESC);
getPreferenceScreen().setTitle(R.string.write_settings);
mSwitchPref.setTitle(R.string.permit_write_settings);
mWriteSettingsPrefs.setTitle(R.string.write_settings_preference);
mWriteSettingsDesc.setSummary(R.string.write_settings_description);
mSwitchPref.setOnPreferenceChangeListener(this);
mWriteSettingsPrefs.setOnPreferenceClickListener(this);
mSettingsIntent = new Intent(Intent.ACTION_MAIN)
.addCategory(Settings.INTENT_CATEGORY_USAGE_ACCESS_CONFIG)
.setPackage(mPackageName);
}
@Override
public boolean onPreferenceClick(Preference preference) {
if (preference == mWriteSettingsPrefs) {
if (mSettingsIntent != null) {
try {
getActivity().startActivityAsUser(mSettingsIntent, new UserHandle(mUserId));
} catch (ActivityNotFoundException e) {
Log.w(LOG_TAG, "Unable to launch write system settings " + mSettingsIntent, e);
}
}
return true;
}
return false;
}
@Override
public boolean onPreferenceChange(Preference preference, Object newValue) {
if (preference == mSwitchPref) {
if (mWriteSettingsState != null && (Boolean) newValue != mWriteSettingsState
.isPermissible()) {
setCanWriteSettings(!mWriteSettingsState.isPermissible());
refreshUi();
}
return true;
}
return false;
}
private void setCanWriteSettings(boolean newState) {
mAppOpsManager.setMode(AppOpsManager.OP_WRITE_SETTINGS,
mPackageInfo.applicationInfo.uid, mPackageName, newState
? AppOpsManager.MODE_ALLOWED : AppOpsManager.MODE_ERRORED);
}
private boolean canWriteSettings(String pkgName) {
int result = mAppOpsManager.noteOpNoThrow(AppOpsManager.OP_WRITE_SETTINGS,
mPackageInfo.applicationInfo.uid, pkgName);
if (result == AppOpsManager.MODE_ALLOWED) {
return true;
}
return false;
}
@Override
protected boolean refreshUi() {
mWriteSettingsState = mAppBridge.getWriteSettingsInfo(mPackageName,
mPackageInfo.applicationInfo.uid);
boolean canWrite = mWriteSettingsState.isPermissible();
mSwitchPref.setChecked(canWrite);
// you can't ask a user for a permission you didn't even declare!
mSwitchPref.setEnabled(mWriteSettingsState.permissionDeclared);
mWriteSettingsPrefs.setEnabled(canWrite);
getPreferenceScreen().removePreference(mWriteSettingsPrefs);
return true;
}
@Override
protected AlertDialog createDialog(int id, int errorCode) {
return null;
}
@Override
protected int getMetricsCategory() {
return MetricsEvent.SYSTEM_ALERT_WINDOW_APPS;
}
public static CharSequence getSummary(Context context, AppEntry entry) {
WriteSettingsState state;
if (entry.extraInfo instanceof WriteSettingsState) {
state = (WriteSettingsState) entry.extraInfo;
} else if (entry.extraInfo instanceof PermissionState) {
state = new WriteSettingsState((PermissionState) entry.extraInfo);
} else {
state = new AppStateWriteSettingsBridge(context, null, null).getWriteSettingsInfo(
entry.info.packageName, entry.info.uid);
}
return getSummary(context, state);
}
public static CharSequence getSummary(Context context, WriteSettingsState writeSettingsState) {
return context.getString(writeSettingsState.isPermissible() ? R.string.write_settings_on :
R.string.write_settings_off);
}
public static CharSequence getSummary(Context context, String pkg) {
// first check if pkg is a system pkg
boolean isSystem = false;
PackageManager packageManager = context.getPackageManager();
try {
ApplicationInfo appInfo = packageManager.getApplicationInfo(pkg, 0);
if ((appInfo.flags & ApplicationInfo.FLAG_SYSTEM) != 0) {
isSystem = true;
}
} catch (PackageManager.NameNotFoundException e) {
// pkg doesn't even exist?
Log.w(LOG_TAG, "Package " + pkg + " not found", e);
return context.getString(R.string.write_settings_off);
}
AppOpsManager appOpsManager = (AppOpsManager) context.getSystemService(Context
.APP_OPS_SERVICE);
List<AppOpsManager.PackageOps> packageOps = appOpsManager.getPackagesForOps(
APP_OPS_OP_CODE);
if (packageOps == null) {
return context.getString(R.string.write_settings_off);
}
int uid = isSystem ? 0 : -1;
for (AppOpsManager.PackageOps packageOp : packageOps) {
if (pkg.equals(packageOp.getPackageName())) {
uid = packageOp.getUid();
break;
}
}
if (uid == -1) {
return context.getString(R.string.write_settings_off);
}
int mode = appOpsManager.noteOpNoThrow(AppOpsManager.OP_WRITE_SETTINGS, uid, pkg);
return context.getString((mode == AppOpsManager.MODE_ALLOWED) ?
R.string.write_settings_on : R.string.write_settings_off);
}
}