增加守护app服务，当在新设备收到更新指令时，会先检查是否已安装守护app，若未安装则从assets复制文件到SD目录并进行安装。后启动守护app进行主应用更新操作

app/build.gradle

@@ -13,6 +13,7 @@ android {
         ndk {
             abiFilters "armeabi", "armeabi-v7a", "x86", "mips"
         }
+        buildConfigField "int", "DaemonVersion", String.valueOf(rootProject.ext.daemon_verson_code)
     }
     buildTypes {
         debug {

app/src/main/java/com/bgycc/smartcanteen/utils/InstallManager.java

 package com.bgycc.smartcanteen.utils;
 
+import android.content.ComponentName;
+import android.content.Intent;
 import android.os.Build;
 
+import com.bgycc.smartcanteen.BuildConfig;
+import com.bgycc.smartcanteen.MainActivity;
 import com.blankj.utilcode.util.AppUtils;
+import com.blankj.utilcode.util.FileUtils;
 import com.blankj.utilcode.util.LogUtils;
+import com.blankj.utilcode.util.PathUtils;
+import com.blankj.utilcode.util.Utils;
 
 import java.io.File;
+import java.io.FileOutputStream;
+import java.io.IOException;
+import java.io.InputStream;
 
 import static com.bgycc.smartcanteen.utils.SmartCanteenUtils.TAG;
 
 public class InstallManager {
+    private static final String ARG_PATH = "arg_path";
+    private static final String ARG_COMPONENT = "arg_package";
+    // assets文件夹中守护进程apk名称
+    private static final String DAEMON_APK_NAME = "Daemon.apk";
+    // 守护package name
+    private static final String DAEMON_PACKAGE_NAME = "com.bgycc.smartcanteen.daemon";
+    // 守护服务类名称
+    private static final String DAEMON_SERVICE_NAME = "com.bgycc.smartcanteen.daemon.DaemonService";
+
     public static boolean install(File updateApk) {
         String model = Build.MODEL;
         if (Build.VERSION.SDK_INT <= Build.VERSION_CODES.M) {
@@ -17,14 +36,34 @@ public class InstallManager {
             try {
                 Process p = Runtime.getRuntime().exec("chmod 755 " + updateApk);
                 p.waitFor();
-                LogUtils.d(TAG, "开始安装");
+                LogUtils.d(TAG, "安装文件权限修改成功");
             } catch (Exception e) {
                 LogUtils.e(TAG, "安装文件权限修改失败");
                 return false;
             }
         }
         if (model.contains(DeviceProxy.DEVICE_MODEL_TPS)) {
+            // 检查守护进程的安装情况，及其安装版本
+            if (!AppUtils.isAppInstalled(DAEMON_PACKAGE_NAME)) {
+                LogUtils.d(TAG, "守护app未安装，从assets复制并进行安装");
+                // 安装守护进程
+                if (installDaemonFromAssets("守护app安装失败，启动静默安装",
+                        "assets文件夹中未找到守护apk，或守护app复制失败，启动静默安装")) {
+                    return DangerousUtils.installAppSilent(updateApk);
+                }
+            } else {
+                // 若已安装，则检查是否需要更新
+                AppUtils.AppInfo daemonAppInfo = AppUtils.getAppInfo(DAEMON_PACKAGE_NAME);
+                if (daemonAppInfo.getVersionCode() < BuildConfig.DaemonVersion) {
+                    LogUtils.d(TAG, "当前守护app版本: " + daemonAppInfo.getVersionCode() + ", 最新版本: " + BuildConfig.DaemonVersion);
+                    if (installDaemonFromAssets("守护app更新失败，启动静默安装",
+                            "新版app复制失败，启动静默安装")) {
                         return DangerousUtils.installAppSilent(updateApk);
+                    }
+                }
+            }
+            startDaemonForInstall(updateApk);
+            return true;
         } else if (model.contains(DeviceProxy.DEVICE_MODEL_QUAD)) {
             AppUtils.installApp(updateApk);
             return true;
@@ -32,4 +71,47 @@ public class InstallManager {
             throw new RuntimeException("不明设备型号: " + model);
         }
     }
+
+    private static void copyDaemonApkToTarget(File daemonApk) throws IOException {
+        InputStream is = Utils.getApp().getAssets().open(DAEMON_APK_NAME);
+        FileOutputStream fos = new FileOutputStream(daemonApk);
+        byte[] buffer = new byte[1024];
+        int byteCount;
+        while ((byteCount = is.read(buffer)) != -1) {
+            fos.write(buffer, 0, byteCount);
+        }
+        fos.flush();
+        is.close();
+        fos.close();
+    }
+
+    private static boolean installDaemonFromAssets(String installFailedLog, String copyErrorLog) {
+        File daemonApk = new File(PathUtils.getExternalStoragePath(), DAEMON_APK_NAME);
+        try {
+            copyDaemonApkToTarget(daemonApk);
+            boolean result = DangerousUtils.installAppSilent(daemonApk);
+            LogUtils.d(TAG, "守护app安装结果: " + result);
+            if (!result) {
+                LogUtils.d(TAG, installFailedLog);
+                return true;
+            }
+        } catch (IOException e) {
+            LogUtils.d(TAG, "复制安装过程出错: " + copyErrorLog, e);
+            return true;
+        } finally {
+            FileUtils.delete(daemonApk);
+        }
+        return false;
+    }
+
+    private static void startDaemonForInstall(File updateApk) {
+        LogUtils.d(TAG, "启动守护app进行更新操作");
+        ComponentName componentName = new ComponentName(DAEMON_PACKAGE_NAME, DAEMON_SERVICE_NAME);
+        Intent intent = new Intent();
+        intent.putExtra(ARG_PATH, updateApk.getAbsoluteFile());
+        intent.putExtra(ARG_COMPONENT, BuildConfig.APPLICATION_ID + File.separator + MainActivity.class.getName());
+        intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
+        intent.setComponent(componentName);
+        Utils.getApp().startService(intent);
+    }
 }

build.gradle

 // Top-level build file where you can add configuration options common to all sub-projects/modules.
 
 buildscript {
+    ext {
+        daemon_verson_code = 10
+        daemon_verson_name = "1.0"
+    }
     repositories {
         google()
         jcenter()

daemon/build.gradle

@@ -8,16 +8,25 @@ android {
         applicationId "com.bgycc.smartcanteen.daemon"
         minSdkVersion 22
         targetSdkVersion 29
-        versionCode 1
-        versionName "1.0"
+        versionCode rootProject.ext.daemon_verson_code
+        versionName rootProject.ext.daemon_verson_name
 
         testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
     }
-
     buildTypes {
-        release {
+        debug {
             minifyEnabled false
-            proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
+            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
+        }
+        release {
+            postprocessing {
+                removeUnusedCode true
+                removeUnusedResources true
+                obfuscate false
+                optimizeCode true
+                proguardFiles 'proguard-rules.pro'
+            }
+            zipAlignEnabled true
         }
     }
     compileOptions {

daemon/proguard-rules.pro

@@ -19,3 +19,144 @@
 # If you keep the line number information, uncomment this to
 # hide the original source file name.
 #-renamesourcefileattribute SourceFile
+
+# -----------------------------基本 -----------------------------
+#
+
+# 指定代码的压缩级别 0 - 7(指定代码进行迭代优化的次数，在Android里面默认是5，这条指令也只有在可以优化时起作用。)
+-optimizationpasses 5
+# 混淆时不会产生形形色色的类名(混淆时不使用大小写混合类名)
+-dontusemixedcaseclassnames
+# 指定不去忽略非公共的库类(不跳过library中的非public的类)
+-dontskipnonpubliclibraryclasses
+# 指定不去忽略包可见的库类的成员
+-dontskipnonpubliclibraryclassmembers
+#不进行优化，建议使用此选项，
+-dontoptimize
+ # 不进行预校验,Android不需要,可加快混淆速度。
+-dontpreverify
+# 屏蔽警告
+-ignorewarnings
+# 指定混淆是采用的算法，后面的参数是一个过滤器
+# 这个过滤器是谷歌推荐的算法，一般不做更改
+-optimizations !code/simplification/arithmetic,!field/*,!class/merging/*
+# 保护代码中的Annotation不被混淆
+-keepattributes *Annotation*
+# 避免混淆泛型, 这在JSON实体映射时非常重要
+-keepattributes Signature
+# 抛出异常时保留代码行号
+-keepattributes SourceFile,LineNumberTable
+ #优化时允许访问并修改有修饰符的类和类的成员，这可以提高优化步骤的结果。
+# 比如，当内联一个公共的getter方法时，这也可能需要外地公共访问。
+# 虽然java二进制规范不需要这个，要不然有的虚拟机处理这些代码会有问题。当有优化和使用-repackageclasses时才适用。
+#指示语：不能用这个指令处理库中的代码，因为有的类和类成员没有设计成public ,而在api中可能变成public
+-allowaccessmodification
+#当有优化和使用-repackageclasses时才适用。
+-repackageclasses
+ # 混淆时记录日志(打印混淆的详细信息)
+ # 这句话能够使我们的项目混淆后产生映射文件
+ # 包含有类名->混淆后类名的映射关系
+-verbose
+
+#
+# ----------------------------- 默认保留 -----------------------------
+#
+#----------------------------------------------------
+# 保持哪些类不被混淆
+#继承activity,application,service,broadcastReceiver,contentprovider....不进行混淆
+-keep public class * extends android.app.Activity
+-keep public class * extends android.app.Application
+-keep public class * extends android.support.multidex.MultiDexApplication
+-keep public class * extends android.app.Service
+-keep public class * extends android.content.BroadcastReceiver
+-keep public class * extends android.content.ContentProvider
+-keep public class * extends android.app.backup.BackupAgentHelper
+-keep public class * extends android.preference.Preference
+-keep public class * extends android.view.View
+-keep class android.support.** {*;}## 保留support下的所有类及其内部类
+
+-keep public class com.google.vending.licensing.ILicensingService
+-keep public class com.android.vending.licensing.ILicensingService
+#表示不混淆上面声明的类，最后这两个类我们基本也用不上，是接入Google原生的一些服务时使用的。
+#----------------------------------------------------
+
+# 保留继承的
+-keep public class * extends android.support.v4.**
+-keep public class * extends android.support.v7.**
+-keep public class * extends android.support.annotation.**
+
+#表示不混淆任何包含native方法的类的类名以及native方法名，这个和我们刚才验证的结果是一致
+-keepclasseswithmembernames class * {
+    native <methods>;
+}
+
+#这个主要是在layout 中写的onclick方法android:onclick="onClick"，不进行混淆
+#表示不混淆Activity中参数是View的方法，因为有这样一种用法，在XML中配置android:onClick=”buttonClick”属性，
+#当用户点击该按钮时就会调用Activity中的buttonClick(View view)方法，如果这个方法被混淆的话就找不到了
+-keepclassmembers class * extends android.app.Activity{
+    public void *(android.view.View);
+}
+
+#表示不混淆枚举中的values()和valueOf()方法，枚举我用的非常少，这个就不评论了
+-keepclassmembers enum * {
+    public static **[] values();
+    public static ** valueOf(java.lang.String);
+}
+
+#表示不混淆任何一个View中的setXxx()和getXxx()方法，
+#因为属性动画需要有相应的setter和getter的方法实现，混淆了就无法工作了。
+-keep public class * extends android.view.View{
+    *** get*();
+    void set*(***);
+    public <init>(android.content.Context);
+    public <init>(android.content.Context, android.util.AttributeSet);
+    public <init>(android.content.Context, android.util.AttributeSet, int);
+}
+-keepclasseswithmembers class * {
+    public <init>(android.content.Context, android.util.AttributeSet);
+    public <init>(android.content.Context, android.util.AttributeSet, int);
+}
+
+#表示不混淆Parcelable实现类中的CREATOR字段，
+#毫无疑问，CREATOR字段是绝对不能改变的，包括大小写都不能变，不然整个Parcelable工作机制都会失败。
+-keep class * implements android.os.Parcelable {
+  public static final android.os.Parcelable$Creator *;
+}
+# 这指定了继承Serizalizable的类的如下成员不被移除混淆
+-keepclassmembers class * implements java.io.Serializable {
+    static final long serialVersionUID;
+    private static final java.io.ObjectStreamField[] serialPersistentFields;
+    private void writeObject(java.io.ObjectOutputStream);
+    private void readObject(java.io.ObjectInputStream);
+    java.lang.Object writeReplace();
+    java.lang.Object readResolve();
+}
+# 保留R下面的资源
+#-keep class **.R$* {
+# *;
+#}
+#不混淆资源类下static的
+-keepclassmembers class **.R$* {
+    public static <fields>;
+}
+
+# 对于带有回调函数的onXXEvent、**On*Listener的，不能被混淆
+-keepclassmembers class * {
+    void *(**On*Event);
+    void *(**On*Listener);
+}
+
+# 保留我们自定义控件（继承自View）不被混淆
+-keep public class * extends android.view.View{
+    *** get*();
+    void set*(***);
+    public <init>(android.content.Context);
+    public <init>(android.content.Context, android.util.AttributeSet);
+    public <init>(android.content.Context, android.util.AttributeSet, int);
+}
+
+#
+# ----------------------------- 第三方 -----------------------------
+#
+#不混淆smartcanteen下的所有类
+-keep class com.bgycc.smartcanteen.** { *; }

daemon/src/main/java/com/bgycc/smartcanteen/daemon/DaemonService.java

 package com.bgycc.smartcanteen.daemon;
 
 import android.app.Service;
+import android.content.ComponentName;
 import android.content.Intent;
 import android.os.IBinder;
+import android.text.TextUtils;
 
 import androidx.annotation.Nullable;
 
+import com.blankj.utilcode.util.FileUtils;
+import com.blankj.utilcode.util.LogUtils;
+import com.blankj.utilcode.util.PathUtils;
+import com.blankj.utilcode.util.ShellUtils;
+
+import java.io.File;
+
 public class DaemonService extends Service {
+    private static final String TAG = "DaemonService";
+    private static final String UPDATE_APK = "SmartCanteen-update.apk";
+    private static final String ARG_PATH = "arg_path";
+    private static final String ARG_COMPONENT = "arg_package";
+    // 主应用package name
+    private static final String MAIN_PACKAGE_NAME = "com.bgycc.smartcanteen";
+    // 主应用类名称
+    private static final String MAIN_SERVICE_NAME = "com.bgycc.smartcanteen.MainActivity";
+
+    @Override
+    public int onStartCommand(Intent intent, int flags, int startId) {
+        String path = intent.getStringExtra(ARG_PATH);
+        if (TextUtils.isEmpty(path)) {
+            path = PathUtils.getExternalStoragePath() + File.separator + UPDATE_APK;
+            LogUtils.d(TAG, "安装apk地址为空，使用默认地址: " + path);
+        }
+        // 当找不到安装apk时，直接启动主应用
+        if (!FileUtils.isFileExists(path)) {
+            LogUtils.w(TAG, "安装失败, 找不到apk");
+            ComponentName componentName = new ComponentName(MAIN_PACKAGE_NAME, MAIN_SERVICE_NAME);
+            Intent startMainActivity = new Intent();
+            intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
+            intent.setComponent(componentName);
+            startActivity(startMainActivity);
+            stopSelf(START_NOT_STICKY);
+            return START_NOT_STICKY ;
+        }
+
+        String component = intent.getStringExtra(ARG_COMPONENT);
+        if (TextUtils.isEmpty(component)) {
+            component = MAIN_PACKAGE_NAME + File.separator + MAIN_SERVICE_NAME;
+            LogUtils.d(TAG, "安装完毕启动包名为空，使用默认包名: " + component);
+        }
+
+        String command = "LD_LIBRARY_PATH=/vendor/lib*:/system/lib* pm install -r " + '"' + path + '"'
+                + ";am start -W " + component;
+        LogUtils.d(TAG, "开始静默安装, path: " + path + ", component: " + command);
+        ShellUtils.CommandResult commandResult = ShellUtils.execCmd(command, isDeviceRooted());
+        LogUtils.d(TAG, "安装完毕, success: " + commandResult.successMsg +
+                ", error: " + commandResult.errorMsg);
+        FileUtils.delete(path);
+        stopSelf(START_NOT_STICKY);
+        return START_NOT_STICKY ;
+    }
 
     @Nullable
     @Override
     public IBinder onBind(Intent intent) {
         return null;
     }
+
+    private static boolean isDeviceRooted() {
+        String su = "su";
+        String[] locations = {"/system/bin/", "/system/xbin/", "/sbin/", "/system/sd/xbin/",
+                "/system/bin/failsafe/", "/data/local/xbin/", "/data/local/bin/", "/data/local/",
+                "/system/sbin/", "/usr/bin/", "/vendor/bin/"};
+        for (String location : locations) {
+            if (new File(location + su).exists()) {
+                return true;
+            }
+        }
+        return false;
+    }
 }

daemon/src/main/java/com/bgycc/smartcanteen/daemon/DangerousUtils.java

+package com.bgycc.smartcanteen.daemon;
+import android.app.PendingIntent;
+import android.content.Context;
+import android.content.Intent;
+import android.os.Build;
+import android.os.PowerManager;
+import android.telephony.SmsManager;
+import android.telephony.TelephonyManager;
+import android.text.TextUtils;
+import android.util.Log;
+
+import androidx.annotation.RequiresPermission;
+
+import com.blankj.utilcode.util.ShellUtils;
+import com.blankj.utilcode.util.Utils;
+
+import java.io.File;
+import java.lang.reflect.Method;
+import java.util.List;
+
+import static android.Manifest.permission.MODIFY_PHONE_STATE;
+import static android.Manifest.permission.SEND_SMS;
+
+/**
+ * <pre>
+ *     author: Blankj
+ *     blog  : http://blankj.com
+ *     time  : 2019/06/29
+ *     desc  :
+ * </pre>
+ */
+public class DangerousUtils {
+
+    private DangerousUtils() {
+        throw new UnsupportedOperationException("u can't instantiate me...");
+    }
+
+    ///////////////////////////////////////////////////////////////////////////
+    // AppUtils
+    ///////////////////////////////////////////////////////////////////////////
+
+    /**
+     * Install the app silently.
+     * <p>Without root permission must hold
+     * {@code android:sharedUserId="android.uid.shell"} and
+     * {@code <uses-permission android:name="android.permission.INSTALL_PACKAGES" />}</p>
+     *
+     * @param filePath The path of file.
+     * @return {@code true}: success<br>{@code false}: fail
+     */
+    public static boolean installAppSilent(final String filePath) {
+        return installAppSilent(getFileByPath(filePath), null);
+    }
+
+    /**
+     * Install the app silently.
+     * <p>Without root permission must hold
+     * {@code android:sharedUserId="android.uid.shell"} and
+     * {@code <uses-permission android:name="android.permission.INSTALL_PACKAGES" />}</p>
+     *
+     * @param file The file.
+     * @return {@code true}: success<br>{@code false}: fail
+     */
+    public static boolean installAppSilent(final File file) {
+        return installAppSilent(file, null);
+    }
+
+
+    /**
+     * Install the app silently.
+     * <p>Without root permission must hold
+     * {@code android:sharedUserId="android.uid.shell"} and
+     * {@code <uses-permission android:name="android.permission.INSTALL_PACKAGES" />}</p>
+     *
+     * @param filePath The path of file.
+     * @param params   The params of installation(e.g.,<code>-r</code>, <code>-s</code>).
+     * @return {@code true}: success<br>{@code false}: fail
+     */
+    public static boolean installAppSilent(final String filePath, final String params) {
+        return installAppSilent(getFileByPath(filePath), params);
+    }
+
+    /**
+     * Install the app silently.
+     * <p>Without root permission must hold
+     * {@code android:sharedUserId="android.uid.shell"} and
+     * {@code <uses-permission android:name="android.permission.INSTALL_PACKAGES" />}</p>
+     *
+     * @param file   The file.
+     * @param params The params of installation(e.g.,<code>-r</code>, <code>-s</code>).
+     * @return {@code true}: success<br>{@code false}: fail
+     */
+    public static boolean installAppSilent(final File file, final String params) {
+        return installAppSilent(file, params, isDeviceRooted());
+    }
+
+    /**
+     * Install the app silently.
+     * <p>Without root permission must hold
+     * {@code android:sharedUserId="android.uid.shell"} and
+     * {@code <uses-permission android:name="android.permission.INSTALL_PACKAGES" />}</p>
+     *
+     * @param file     The file.
+     * @param params   The params of installation(e.g.,<code>-r</code>, <code>-s</code>).
+     * @param isRooted True to use root, false otherwise.
+     * @return {@code true}: success<br>{@code false}: fail
+     */
+    public static boolean installAppSilent(final File file,
+                                           final String params,
+                                           final boolean isRooted) {
+        if (!isFileExists(file)) return false;
+        String filePath = '"' + file.getAbsolutePath() + '"';
+        String command = "LD_LIBRARY_PATH=/vendor/lib*:/system/lib* pm install -r " +
+                (params == null ? "" : params + " ")
+                + filePath;
+        ShellUtils.CommandResult commandResult = ShellUtils.execCmd(command, isRooted);
+        if (commandResult.successMsg != null
+                && commandResult.successMsg.toLowerCase().contains("success")) {
+            return true;
+        } else {
+            Log.e("AppUtils", "installAppSilent successMsg: " + commandResult.successMsg +
+                    ", errorMsg: " + commandResult.errorMsg);
+            return false;
+        }
+    }
+
+    /**
+     * Uninstall the app silently.
+     * <p>Without root permission must hold
+     * {@code android:sharedUserId="android.uid.shell"} and
+     * {@code <uses-permission android:name="android.permission.DELETE_PACKAGES" />}</p>
+     *
+     * @param packageName The name of the package.
+     * @return {@code true}: success<br>{@code false}: fail
+     */
+    public static boolean uninstallAppSilent(final String packageName) {
+        return uninstallAppSilent(packageName, false);
+    }
+
+    /**
+     * Uninstall the app silently.
+     * <p>Without root permission must hold
+     * {@code android:sharedUserId="android.uid.shell"} and
+     * {@code <uses-permission android:name="android.permission.DELETE_PACKAGES" />}</p>
+     *
+     * @param packageName The name of the package.
+     * @param isKeepData  Is keep the data.
+     * @return {@code true}: success<br>{@code false}: fail
+     */
+    public static boolean uninstallAppSilent(final String packageName, final boolean isKeepData) {
+        return uninstallAppSilent(packageName, isKeepData, isDeviceRooted());
+    }
+
+    /**
+     * Uninstall the app silently.
+     * <p>Without root permission must hold
+     * {@code android:sharedUserId="android.uid.shell"} and
+     * {@code <uses-permission android:name="android.permission.DELETE_PACKAGES" />}</p>
+     *
+     * @param packageName The name of the package.
+     * @param isKeepData  Is keep the data.
+     * @param isRooted    True to use root, false otherwise.
+     * @return {@code true}: success<br>{@code false}: fail
+     */
+    public static boolean uninstallAppSilent(final String packageName,
+                                             final boolean isKeepData,
+                                             final boolean isRooted) {
+        if (isSpace(packageName)) return false;
+        String command = "LD_LIBRARY_PATH=/vendor/lib*:/system/lib* pm uninstall "
+                + (isKeepData ? "-k " : "")
+                + packageName;
+        ShellUtils.CommandResult commandResult = ShellUtils.execCmd(command, isRooted);
+        if (commandResult.successMsg != null
+                && commandResult.successMsg.toLowerCase().contains("success")) {
+            return true;
+        } else {
+            Log.e("AppUtils", "uninstallAppSilent successMsg: " + commandResult.successMsg +
+                    ", errorMsg: " + commandResult.errorMsg);
+            return false;
+        }
+    }
+
+    private static boolean isFileExists(final File file) {
+        return file != null && file.exists();
+    }
+
+    private static File getFileByPath(final String filePath) {
+        return isSpace(filePath) ? null : new File(filePath);
+    }
+
+    private static boolean isSpace(final String s) {
+        if (s == null) return true;
+        for (int i = 0, len = s.length(); i < len; ++i) {
+            if (!Character.isWhitespace(s.charAt(i))) {
+                return false;
+            }
+        }
+        return true;
+    }
+
+    private static boolean isDeviceRooted() {
+        String su = "su";
+        String[] locations = {"/system/bin/", "/system/xbin/", "/sbin/", "/system/sd/xbin/",
+                "/system/bin/failsafe/", "/data/local/xbin/", "/data/local/bin/", "/data/local/",
+                "/system/sbin/", "/usr/bin/", "/vendor/bin/"};
+        for (String location : locations) {
+            if (new File(location + su).exists()) {
+                return true;
+            }
+        }
+        return false;
+    }
+
+
+    ///////////////////////////////////////////////////////////////////////////
+    // DeviceUtils
+    ///////////////////////////////////////////////////////////////////////////
+
+    /**
+     * Shutdown the device
+     * <p>Requires root permission
+     * or hold {@code android:sharedUserId="android.uid.system"},
+     * {@code <uses-permission android:name="android.permission.SHUTDOWN" />}
+     * in manifest.</p>
+     *
+     * @return {@code true}: success<br>{@code false}: fail
+     */
+    public static boolean shutdown() {
+        try {
+            ShellUtils.CommandResult result = ShellUtils.execCmd("reboot -p", true);
+            if (result.result == 0) return true;
+            Intent intent = new Intent("android.intent.action.ACTION_REQUEST_SHUTDOWN");
+            intent.putExtra("android.intent.extra.KEY_CONFIRM", false);
+            Utils.getApp().startActivity(intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK));
+            return true;
+        } catch (Exception e) {
+            return false;
+        }
+    }
+
+    /**
+     * Reboot the device.
+     * <p>Requires root permission
+     * or hold {@code android:sharedUserId="android.uid.system"} in manifest.</p>
+     *
+     * @return {@code true}: success<br>{@code false}: fail
+     */
+    public static boolean reboot() {
+        try {
+            ShellUtils.CommandResult result = ShellUtils.execCmd("reboot", true);
+            if (result.result == 0) return true;
+            Intent intent = new Intent(Intent.ACTION_REBOOT);
+            intent.putExtra("nowait", 1);
+            intent.putExtra("interval", 1);
+            intent.putExtra("window", 0);
+            Utils.getApp().sendBroadcast(intent);
+            return true;
+        } catch (Exception e) {
+            return false;
+        }
+    }
+
+    /**
+     * Reboot the device.
+     * <p>Requires root permission
+     * or hold {@code android:sharedUserId="android.uid.system"},
+     * {@code <uses-permission android:name="android.permission.REBOOT" />}</p>
+     *
+     * @param reason code to pass to the kernel (e.g., "recovery") to
+     *               request special boot modes, or null.
+     * @return {@code true}: success<br>{@code false}: fail
+     */
+    public static boolean reboot(final String reason) {
+        try {
+            PowerManager pm = (PowerManager) Utils.getApp().getSystemService(Context.POWER_SERVICE);
+            pm.reboot(reason);
+            return true;
+        } catch (Exception e) {
+            return false;
+        }
+    }
+
+    /**
+     * Reboot the device to recovery.
+     * <p>Requires root permission.</p>
+     *
+     * @return {@code true}: success<br>{@code false}: fail
+     */
+    public static boolean reboot2Recovery() {
+        ShellUtils.CommandResult result = ShellUtils.execCmd("reboot recovery", true);
+        return result.result == 0;
+    }
+
+    /**
+     * Reboot the device to bootloader.
+     * <p>Requires root permission.</p>
+     *
+     * @return {@code true}: success<br>{@code false}: fail
+     */
+    public static boolean reboot2Bootloader() {
+        ShellUtils.CommandResult result = ShellUtils.execCmd("reboot bootloader", true);
+        return result.result == 0;
+    }
+
+
+    /**
+     * Enable or disable mobile data.
+     * <p>Must hold {@code android:sharedUserId="android.uid.system"},
+     * {@code <uses-permission android:name="android.permission.MODIFY_PHONE_STATE" />}</p>
+     *
+     * @param enabled True to enabled, false otherwise.
+     * @return {@code true}: success<br>{@code false}: fail
+     */
+    @RequiresPermission(MODIFY_PHONE_STATE)
+    public static boolean setMobileDataEnabled(final boolean enabled) {
+        try {
+            TelephonyManager tm =
+                    (TelephonyManager) Utils.getApp().getSystemService(Context.TELEPHONY_SERVICE);
+            if (tm == null) return false;
+            if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
+                tm.setDataEnabled(enabled);
+                return true;
+            }
+            Method setDataEnabledMethod =
+                    tm.getClass().getDeclaredMethod("setDataEnabled", boolean.class);
+            setDataEnabledMethod.invoke(tm, enabled);
+            return true;
+        } catch (Exception e) {
+            Log.e("NetworkUtils", "setMobileDataEnabled: ", e);
+        }
+        return false;
+    }
+
+    /**
+     * Send sms silently.
+     * <p>Must hold {@code <uses-permission android:name="android.permission.SEND_SMS" />}</p>
+     *
+     * @param phoneNumber The phone number.
+     * @param content     The content.
+     */
+    @RequiresPermission(SEND_SMS)
+    public static void sendSmsSilent(final String phoneNumber, final String content) {
+        if (TextUtils.isEmpty(content)) return;
+        PendingIntent sentIntent = PendingIntent.getBroadcast(Utils.getApp(), 0, new Intent("send"), 0);
+        SmsManager smsManager = SmsManager.getDefault();
+        if (content.length() >= 70) {
+            List<String> ms = smsManager.divideMessage(content);
+            for (String str : ms) {
+                smsManager.sendTextMessage(phoneNumber, null, str, sentIntent, null);
+            }
+        } else {
+            smsManager.sendTextMessage(phoneNumber, null, content, sentIntent, null);
+        }
+    }
+}
\ No newline at end of file