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/*
* Copyright 2019 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.angle.common;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.SharedPreferences;
import android.database.ContentObserver;
import android.net.Uri;
import android.os.Bundle;
import android.os.Handler;
import android.provider.Settings;
import android.util.Log;
import androidx.preference.PreferenceManager;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import java.io.IOException;
import java.io.InputStream;
public class Receiver extends BroadcastReceiver
{
private static final String TAG = "AngleReceiver";
private static final String ANGLE_RULES_FILE = "a4a_rules.json";
@Override
public void onReceive(Context context, Intent intent)
{
String action = intent.getAction();
Log.v(TAG, "Received intent: '" + action + "'");
if (action.equals(context.getString(R.string.intent_angle_for_android_toast_message)))
{
Bundle results = getResultExtras(true);
results.putString(context.getString(R.string.intent_key_a4a_toast_message),
context.getString(R.string.angle_in_use_toast_message));
}
else
{
String jsonStr = loadRules(context);
String packageNames = parsePackageNames(jsonStr);
// Update the ANGLE allowlist
if (packageNames != null)
{
GlobalSettings.updateAngleAllowlist(context, packageNames);
}
updateDeveloperOptionsWatcher(context);
}
}
/*
* Open the rules file and pull all the JSON into a string
*/
private String loadRules(Context context)
{
String jsonStr = null;
try
{
InputStream rulesStream = context.getAssets().open(ANGLE_RULES_FILE);
int size = rulesStream.available();
byte[] buffer = new byte[size];
rulesStream.read(buffer);
rulesStream.close();
jsonStr = new String(buffer, "UTF-8");
}
catch (IOException ioe)
{
Log.e(TAG, "Failed to open " + ANGLE_RULES_FILE + ": ", ioe);
}
return jsonStr;
}
/*
* Extract all app package names from the json file and return them comma separated
*/
private String parsePackageNames(String rulesJSON)
{
StringBuilder packageNames = new StringBuilder();
try
{
JSONObject jsonObj = new JSONObject(rulesJSON);
JSONArray rules = jsonObj.getJSONArray("Rules");
if (rules == null)
{
Log.e(TAG, "No Rules in " + ANGLE_RULES_FILE);
return null;
}
for (int i = 0; i < rules.length(); i++)
{
JSONObject rule = rules.getJSONObject(i);
JSONArray apps = rule.optJSONArray("Applications");
if (apps == null)
{
Log.v(TAG, "Skipping Rules entry with no Applications");
continue;
}
for (int j = 0; j < apps.length(); j++)
{
JSONObject app = apps.optJSONObject(j);
String appName = app.optString("AppName");
if ((appName == null) || appName.isEmpty())
{
Log.e(TAG, "Invalid AppName: '" + appName + "'");
}
if (!packageNames.toString().isEmpty())
{
packageNames.append(",");
}
packageNames.append(appName);
}
}
Log.v(TAG, "Parsed the following package names from " + ANGLE_RULES_FILE + ": "
+ packageNames);
}
catch (JSONException je)
{
Log.e(TAG, "Error when parsing angle JSON: ", je);
return null;
}
return packageNames.toString();
}
static void updateAllUseAngle(Context context)
{
SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(context);
String allUseAngleKey = context.getString(R.string.pref_key_all_angle);
boolean allUseAngle = prefs.getBoolean(allUseAngleKey, false);
GlobalSettings.updateAllUseAngle(context, allUseAngle);
Log.v(TAG, "All PKGs use ANGLE set to: " + allUseAngle);
}
static void updateShowAngleInUseDialogBox(Context context)
{
SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(context);
String showAngleInUseDialogBoxKey =
context.getString(R.string.pref_key_angle_in_use_dialog);
boolean showAngleInUseDialogBox = prefs.getBoolean(showAngleInUseDialogBoxKey, false);
GlobalSettings.updateShowAngleInUseDialog(context, showAngleInUseDialogBox);
Log.v(TAG, "Show 'ANGLE In Use' dialog box set to: " + showAngleInUseDialogBox);
}
/**
* When Developer Options are disabled, reset all of the global settings back to their defaults.
*/
private static void updateDeveloperOptionsWatcher(Context context)
{
Uri settingUri = Settings.Global.getUriFor(Settings.Global.DEVELOPMENT_SETTINGS_ENABLED);
ContentObserver developerOptionsObserver = new ContentObserver(new Handler()) {
@Override
public void onChange(boolean selfChange)
{
super.onChange(selfChange);
boolean developerOptionsEnabled =
(1
== Settings.Global.getInt(context.getContentResolver(),
Settings.Global.DEVELOPMENT_SETTINGS_ENABLED, 0));
Log.v(TAG, "Developer Options enabled value changed: "
+ "developerOptionsEnabled = " + developerOptionsEnabled);
if (!developerOptionsEnabled)
{
// Reset the necessary settings to their defaults.
SharedPreferences.Editor editor =
PreferenceManager.getDefaultSharedPreferences(context).edit();
editor.clear();
editor.apply();
GlobalSettings.clearAllGlobalSettings(context);
}
}
};
context.getContentResolver().registerContentObserver(
settingUri, false, developerOptionsObserver);
developerOptionsObserver.onChange(true);
}
}
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