Utility methods for checking if the Xposed framework is installed.

XposedUtils.java

/*
 * Copyright (C) 2016 Jared Rummler <jared.rummler@gmail.com>
 *
 * 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.
 */

import android.content.Context;
import android.content.pm.ApplicationInfo;
import android.content.pm.PackageInfo;
import android.content.pm.PackageManager;
import android.os.Bundle;

import java.io.File;
import java.lang.reflect.Method;
import java.util.ArrayList;
import java.util.List;

import dalvik.system.DexClassLoader;

/**
 * Utility methods for checking if the Xposed framework is installed.
 */
public class XposedUtils {

  /**
   * Get the current Xposed version installed on the device.
   *
   * @param context
   *     The application context
   * @return The Xposed version or {@code null} if Xposed isn't installed.
   */
  public static Integer getXposedVersion(Context context) {
    try {
      File xposedBridge = new File("/system/framework/XposedBridge.jar");
      if (xposedBridge.exists()) {
        File optimizedDir = context.getDir("dex", Context.MODE_PRIVATE);
        DexClassLoader dexClassLoader = new DexClassLoader(xposedBridge.getPath(),
            optimizedDir.getPath(), null, ClassLoader.getSystemClassLoader());
        Class<?> XposedBridge = dexClassLoader.loadClass("de.robv.android.xposed.XposedBridge");
        Method getXposedVersion = XposedBridge.getDeclaredMethod("getXposedVersion");
        if (!getXposedVersion.isAccessible()) getXposedVersion.setAccessible(true);
        return (Integer) getXposedVersion.invoke(null);
      }
    } catch (Exception ignored) {
    }
    return null;
  }

  /**
   * Check if the Xposed installer is installed and enabled on the device.
   *
   * @param context
   *     The application context
   * @return {@code true} if the package "de.robv.android.xposed.installer" is installed and enabled.
   */
  public static boolean isXposedInstallerAvailable(Context context) {
    try {
      ApplicationInfo appInfo = context.getPackageManager().getApplicationInfo("de.robv.android.xposed.installer", 0);
      if (appInfo != null) {
        return appInfo.enabled;
      }
    } catch (PackageManager.NameNotFoundException ignored) {
    }
    return false;
  }

  /**
   * Check if the Xposed framework is installed and active.
   *
   * @return {@code true} if Xposed is active on the device.
   */
  public static boolean isXposedActive() {
    StackTraceElement[] stackTraces = new Throwable().getStackTrace();
    for (StackTraceElement stackTrace : stackTraces) {
      final String clazzName = stackTrace.getClassName();
      if (clazzName != null && clazzName.contains("de.robv.android.xposed.XposedBridge")) {
        return true;
      }
    }
    return false;
  }

  /**
   * Get all currently installed Xposed modules.
   *
   * @param context The application context
   * @return A list of installed Xposed modules.
   */
  public static ArrayList<PackageInfo> getInstalledXposedPackages(Context context) {
    ArrayList<PackageInfo> packages = new ArrayList<>();
    PackageManager pm = context.getPackageManager();
    List<PackageInfo> installedPackages = pm.getInstalledPackages(PackageManager.GET_META_DATA);
    for (PackageInfo installedPackage : installedPackages) {
      Bundle metaData = installedPackage.applicationInfo.metaData;
      if (metaData != null && metaData.containsKey("xposedmodule")) {
        packages.add(installedPackage);
      }
    }
    return packages;
  }

}