android app在系统重启绕过USB授权对话框，自动获取USB权限

最近由于项目需要参考了很多关于不修改android源码情况下实现屏蔽USB授权对话框的博文，结合自身实践阐述给出细节的实现过程。

当前实现的策略是开发一个android内部服务，用于响应需要使用USB授权的app的申请，app需要在使用USB之前主动申请我们自行开发的授权，走在默认授权对话框触发之前提出申请。

一、创建一个android内部服务apk

1）具体使用的AndroidManifest.xm

2)建立android.hardware.usb.IUsbManager.java替换系统源码

/*
 * This file is auto-generated.  DO NOT MODIFY.
 * Original file: frameworks/base/core/java/android/hardware/usb/IUsbManager.aidl
 */
package android.hardware.usb;
/** @hide */
public interface IUsbManager extends android.os.IInterface
{
    /** Local-side IPC implementation stub class. */
    public static abstract class Stub extends android.os.Binder implements android.hardware.usb.IUsbManager
    {
        private static final java.lang.String DESCRIPTOR = "android.hardware.usb.IUsbManager";
        /** Construct the stub at attach it to the interface. */
        public Stub()
        {
            this.attachInterface(this, DESCRIPTOR);
        }
        /**
         * Cast an IBinder object into an android.hardware.usb.IUsbManager interface,
         * generating a proxy if needed.
         */
        public static android.hardware.usb.IUsbManager asInterface(android.os.IBinder obj)
        {
            if ((obj==null)) {
                return null;
            }
            android.os.IInterface iin = obj.queryLocalInterface(DESCRIPTOR);
            if (((iin!=null)&&(iin instanceof android.hardware.usb.IUsbManager))) {
                return ((android.hardware.usb.IUsbManager)iin);
            }
            return new android.hardware.usb.IUsbManager.Stub.Proxy(obj);
        }
        @Override public android.os.IBinder asBinder()
        {
            return this;
        }
        @Override public boolean onTransact(int code, android.os.Parcel data, android.os.Parcel reply, int flags) throws android.os.RemoteException
        {
            switch (code)
            {
                case INTERFACE_TRANSACTION:
                {
                    reply.writeString(DESCRIPTOR);
                    return true;
                }
                case TRANSACTION_getDeviceList:
                {
                    data.enforceInterface(DESCRIPTOR);
                    android.os.Bundle _arg0;
                    _arg0 = new android.os.Bundle();
                    this.getDeviceList(_arg0);
                    reply.writeNoException();
                    if ((_arg0!=null)) {
                        reply.writeInt(1);
                        _arg0.writeToParcel(reply, android.os.Parcelable.PARCELABLE_WRITE_RETURN_VALUE);
                    }
                    else {
                        reply.writeInt(0);
                    }
                    return true;
                }
                case TRANSACTION_openDevice:
                {
                    data.enforceInterface(DESCRIPTOR);
                    java.lang.String _arg0;
                    _arg0 = data.readString();
                    android.os.ParcelFileDescriptor _result = this.openDevice(_arg0);
                    reply.writeNoException();
                    if ((_result!=null)) {
                        reply.writeInt(1);
                        _result.writeToParcel(reply, android.os.Parcelable.PARCELABLE_WRITE_RETURN_VALUE);
                    }
                    else {
                        reply.writeInt(0);
                    }
                    return true;
                }
                case TRANSACTION_getCurrentAccessory:
                {
                    data.enforceInterface(DESCRIPTOR);
                    android.hardware.usb.UsbAccessory _result = this.getCurrentAccessory();
                    reply.writeNoException();
                    if ((_result!=null)) {
                        reply.writeInt(1);
                        _result.writeToParcel(reply, android.os.Parcelable.PARCELABLE_WRITE_RETURN_VALUE);
                    }
                    else {
                        reply.writeInt(0);
                    }
                    return true;
                }
                case TRANSACTION_openAccessory:
                {
                    data.enforceInterface(DESCRIPTOR);
                    android.hardware.usb.UsbAccessory _arg0;
                    if ((0!=data.readInt())) {
                        _arg0 = android.hardware.usb.UsbAccessory.CREATOR.createFromParcel(data);
                    }
                    else {
                        _arg0 = null;
                    }
                    android.os.ParcelFileDescriptor _result = this.openAccessory(_arg0);
                    reply.writeNoException();
                    if ((_result!=null)) {
                        reply.writeInt(1);
                        _result.writeToParcel(reply, android.os.Parcelable.PARCELABLE_WRITE_RETURN_VALUE);
                    }
                    else {
                        reply.writeInt(0);
                    }
                    return true;
                }
                case TRANSACTION_setDevicePackage:
                {
                    data.enforceInterface(DESCRIPTOR);
                    android.hardware.usb.UsbDevice _arg0;
                    if ((0!=data.readInt())) {
                        _arg0 = android.hardware.usb.UsbDevice.CREATOR.createFromParcel(data);
                    }
                    else {
                        _arg0 = null;
                    }
                    java.lang.String _arg1;
                    _arg1 = data.readString();
                    int _arg2;
                    _arg2 = data.readInt();
                    this.setDevicePackage(_arg0, _arg1, _arg2);
                    reply.writeNoException();
                    return true;
                }
                case TRANSACTION_setAccessoryPackage:
                {
                    data.enforceInterface(DESCRIPTOR);
                    android.hardware.usb.UsbAccessory _arg0;
                    if ((0!=data.readInt())) {
                        _arg0 = android.hardware.usb.UsbAccessory.CREATOR.createFromParcel(data);
                    }
                    else {
                        _arg0 = null;
                    }
                    java.lang.String _arg1;
                    _arg1 = data.readString();
                    int _arg2;
                    _arg2 = data.readInt();
                    this.setAccessoryPackage(_arg0, _arg1, _arg2);
                    reply.writeNoException();
                    return true;
                }
                case TRANSACTION_hasDevicePermission:
                {
                    data.enforceInterface(DESCRIPTOR);
                    android.hardware.usb.UsbDevice _arg0;
                    if ((0!=data.readInt())) {
                        _arg0 = android.hardware.usb.UsbDevice.CREATOR.createFromParcel(data);
                    }
                    else {
                        _arg0 = null;
                    }
                    boolean _result = this.hasDevicePermission(_arg0);
                    reply.writeNoException();
                    reply.writeInt(((_result)?(1):(0)));
                    return true;
                }
                case TRANSACTION_hasAccessoryPermission:
                {
                    data.enforceInterface(DESCRIPTOR);
                    android.hardware.usb.UsbAccessory _arg0;
                    if ((0!=data.readInt())) {
                        _arg0 = android.hardware.usb.UsbAccessory.CREATOR.createFromParcel(data);
                    }
                    else {
                        _arg0 = null;
                    }
                    boolean _result = this.hasAccessoryPermission(_arg0);
                    reply.writeNoException();
                    reply.writeInt(((_result)?(1):(0)));
                    return true;
                }
                case TRANSACTION_requestDevicePermission:
                {
                    data.enforceInterface(DESCRIPTOR);
                    android.hardware.usb.UsbDevice _arg0;
                    if ((0!=data.readInt())) {
                        _arg0 = android.hardware.usb.UsbDevice.CREATOR.createFromParcel(data);
                    }
                    else {
                        _arg0 = null;
                    }
                    java.lang.String _arg1;
                    _arg1 = data.readString();
                    android.app.PendingIntent _arg2;
                    if ((0!=data.readInt())) {
                        _arg2 = android.app.PendingIntent.CREATOR.createFromParcel(data);
                    }
                    else {
                        _arg2 = null;
                    }
                    this.requestDevicePermission(_arg0, _arg1, _arg2);
                    reply.writeNoException();
                    return true;
                }
                case TRANSACTION_requestAccessoryPermission:
                {
                    data.enforceInterface(DESCRIPTOR);
                    android.hardware.usb.UsbAccessory _arg0;
                    if ((0!=data.readInt())) {
                        _arg0 = android.hardware.usb.UsbAccessory.CREATOR.createFromParcel(data);
                    }
                    else {
                        _arg0 = null;
                    }
                    java.lang.String _arg1;
                    _arg1 = data.readString();
                    android.app.PendingIntent _arg2;
                    if ((0!=data.readInt())) {
                        _arg2 = android.app.PendingIntent.CREATOR.createFromParcel(data);
                    }
                    else {
                        _arg2 = null;
                    }
                    this.requestAccessoryPermission(_arg0, _arg1, _arg2);
                    reply.writeNoException();
                    return true;
                }
                case TRANSACTION_grantDevicePermission:
                {
                    data.enforceInterface(DESCRIPTOR);
                    android.hardware.usb.UsbDevice _arg0;
                    if ((0!=data.readInt())) {
                        _arg0 = android.hardware.usb.UsbDevice.CREATOR.createFromParcel(data);
                    }
                    else {
                        _arg0 = null;
                    }
                    int _arg1;
                    _arg1 = data.readInt();
                    this.grantDevicePermission(_arg0, _arg1);
                    reply.writeNoException();
                    return true;
                }
                case TRANSACTION_grantAccessoryPermission:
                {
                    data.enforceInterface(DESCRIPTOR);
                    android.hardware.usb.UsbAccessory _arg0;
                    if ((0!=data.readInt())) {
                        _arg0 = android.hardware.usb.UsbAccessory.CREATOR.createFromParcel(data);
                    }
                    else {
                        _arg0 = null;
                    }
                    int _arg1;
                    _arg1 = data.readInt();
                    this.grantAccessoryPermission(_arg0, _arg1);
                    reply.writeNoException();
                    return true;
                }
                case TRANSACTION_hasDefaults:
                {
                    data.enforceInterface(DESCRIPTOR);
                    java.lang.String _arg0;
                    _arg0 = data.readString();
                    int _arg1;
                    _arg1 = data.readInt();
                    boolean _result = this.hasDefaults(_arg0, _arg1);
                    reply.writeNoException();
                    reply.writeInt(((_result)?(1):(0)));
                    return true;
                }
                case TRANSACTION_clearDefaults:
                {
                    data.enforceInterface(DESCRIPTOR);
                    java.lang.String _arg0;
                    _arg0 = data.readString();
                    int _arg1;
                    _arg1 = data.readInt();
                    this.clearDefaults(_arg0, _arg1);
                    reply.writeNoException();
                    return true;
                }
                case TRANSACTION_setCurrentFunction:
                {
                    data.enforceInterface(DESCRIPTOR);
                    java.lang.String _arg0;
                    _arg0 = data.readString();
                    boolean _arg1;
                    _arg1 = (0!=data.readInt());
                    this.setCurrentFunction(_arg0, _arg1);
                    reply.writeNoException();
                    return true;
                }
                case TRANSACTION_setMassStorageBackingFile:
                {
                    data.enforceInterface(DESCRIPTOR);
                    java.lang.String _arg0;
                    _arg0 = data.readString();
                    this.setMassStorageBackingFile(_arg0);
                    reply.writeNoException();
                    return true;
                }
                case TRANSACTION_allowUsbDebugging:
                {
                    data.enforceInterface(DESCRIPTOR);
                    boolean _arg0;
                    _arg0 = (0!=data.readInt());
                    java.lang.String _arg1;
                    _arg1 = data.readString();
                    this.allowUsbDebugging(_arg0, _arg1);
                    reply.writeNoException();
                    return true;
                }
                case TRANSACTION_denyUsbDebugging:
                {
                    data.enforceInterface(DESCRIPTOR);
                    this.denyUsbDebugging();
                    reply.writeNoException();
                    return true;
                }
                case TRANSACTION_clearUsbDebuggingKeys:
                {
                    data.enforceInterface(DESCRIPTOR);
                    this.clearUsbDebuggingKeys();
                    reply.writeNoException();
                    return true;
                }
            }
            return super.onTransact(code, data, reply, flags);
        }
        private static class Proxy implements android.hardware.usb.IUsbManager
        {
            private android.os.IBinder mRemote;
            Proxy(android.os.IBinder remote)
            {
                mRemote = remote;
            }
            @Override public android.os.IBinder asBinder()
            {
                return mRemote;
            }
            public java.lang.String getInterfaceDescriptor()
            {
                return DESCRIPTOR;
            }
            /* Returns a list of all currently attached USB devices */
            @Override public void getDeviceList(android.os.Bundle devices) throws android.os.RemoteException
            {
                android.os.Parcel _data = android.os.Parcel.obtain();
                android.os.Parcel _reply = android.os.Parcel.obtain();
                try {
                    _data.writeInterfaceToken(DESCRIPTOR);
                    mRemote.transact(Stub.TRANSACTION_getDeviceList, _data, _reply, 0);
                    _reply.readException();
                    if ((0!=_reply.readInt())) {
                        devices.readFromParcel(_reply);
                    }
                }
                finally {
                    _reply.recycle();
                    _data.recycle();
                }
            }
            /* Returns a file descriptor for communicating with the USB device.
                 * The native fd can be passed to usb_device_new() in libusbhost.
                 */
            @Override public android.os.ParcelFileDescriptor openDevice(java.lang.String deviceName) throws android.os.RemoteException
            {
                android.os.Parcel _data = android.os.Parcel.obtain();
                android.os.Parcel _reply = android.os.Parcel.obtain();
                android.os.ParcelFileDescriptor _result;
                try {
                    _data.writeInterfaceToken(DESCRIPTOR);
                    _data.writeString(deviceName);
                    mRemote.transact(Stub.TRANSACTION_openDevice, _data, _reply, 0);
                    _reply.readException();
                    if ((0!=_reply.readInt())) {
                        _result = android.os.ParcelFileDescriptor.CREATOR.createFromParcel(_reply);
                    }
                    else {
                        _result = null;
                    }
                }
                finally {
                    _reply.recycle();
                    _data.recycle();
                }
                return _result;
            }
            /* Returns the currently attached USB accessory */
            @Override public android.hardware.usb.UsbAccessory getCurrentAccessory() throws android.os.RemoteException
            {
                android.os.Parcel _data = android.os.Parcel.obtain();
                android.os.Parcel _reply = android.os.Parcel.obtain();
                android.hardware.usb.UsbAccessory _result;
                try {
                    _data.writeInterfaceToken(DESCRIPTOR);
                    mRemote.transact(Stub.TRANSACTION_getCurrentAccessory, _data, _reply, 0);
                    _reply.readException();
                    if ((0!=_reply.readInt())) {
                        _result = android.hardware.usb.UsbAccessory.CREATOR.createFromParcel(_reply);
                    }
                    else {
                        _result = null;
                    }
                }
                finally {
                    _reply.recycle();
                    _data.recycle();
                }
                return _result;
            }
            /* Returns a file descriptor for communicating with the USB accessory.
                 * This file descriptor can be used with standard Java file operations.
                 */
            @Override public android.os.ParcelFileDescriptor openAccessory(android.hardware.usb.UsbAccessory accessory) throws android.os.RemoteException
            {
                android.os.Parcel _data = android.os.Parcel.obtain();
                android.os.Parcel _reply = android.os.Parcel.obtain();
                android.os.ParcelFileDescriptor _result;
                try {
                    _data.writeInterfaceToken(DESCRIPTOR);
                    if ((accessory!=null)) {
                        _data.writeInt(1);
                        accessory.writeToParcel(_data, 0);
                    }
                    else {
                        _data.writeInt(0);
                    }
                    mRemote.transact(Stub.TRANSACTION_openAccessory, _data, _reply, 0);
                    _reply.readException();
                    if ((0!=_reply.readInt())) {
                        _result = android.os.ParcelFileDescriptor.CREATOR.createFromParcel(_reply);
                    }
                    else {
                        _result = null;
                    }
                }
                finally {
                    _reply.recycle();
                    _data.recycle();
                }
                return _result;
            }
            /* Sets the default package for a USB device
                 * (or clears it if the package name is null)
                 */
            @Override public void setDevicePackage(android.hardware.usb.UsbDevice device, java.lang.String packageName, int userId) throws android.os.RemoteException
            {
                android.os.Parcel _data = android.os.Parcel.obtain();
                android.os.Parcel _reply = android.os.Parcel.obtain();
                try {
                    _data.writeInterfaceToken(DESCRIPTOR);
                    if ((device!=null)) {
                        _data.writeInt(1);
                        device.writeToParcel(_data, 0);
                    }
                    else {
                        _data.writeInt(0);
                    }
                    _data.writeString(packageName);
                    _data.writeInt(userId);
                    mRemote.transact(Stub.TRANSACTION_setDevicePackage, _data, _reply, 0);
                    _reply.readException();
                }
                finally {
                    _reply.recycle();
                    _data.recycle();
                }
            }
            /* Sets the default package for a USB accessory
                 * (or clears it if the package name is null)
                 */
            @Override public void setAccessoryPackage(android.hardware.usb.UsbAccessory accessory, java.lang.String packageName, int userId) throws android.os.RemoteException
            {
                android.os.Parcel _data = android.os.Parcel.obtain();
                android.os.Parcel _reply = android.os.Parcel.obtain();
                try {
                    _data.writeInterfaceToken(DESCRIPTOR);
                    if ((accessory!=null)) {
                        _data.writeInt(1);
                        accessory.writeToParcel(_data, 0);
                    }
                    else {
                        _data.writeInt(0);
                    }
                    _data.writeString(packageName);
                    _data.writeInt(userId);
                    mRemote.transact(Stub.TRANSACTION_setAccessoryPackage, _data, _reply, 0);
                    _reply.readException();
                }
                finally {
                    _reply.recycle();
                    _data.recycle();
                }
            }
            /* Returns true if the caller has permission to access the device. */
            @Override public boolean hasDevicePermission(android.hardware.usb.UsbDevice device) throws android.os.RemoteException
            {
                android.os.Parcel _data = android.os.Parcel.obtain();
                android.os.Parcel _reply = android.os.Parcel.obtain();
                boolean _result;
                try {
                    _data.writeInterfaceToken(DESCRIPTOR);
                    if ((device!=null)) {
                        _data.writeInt(1);
                        device.writeToParcel(_data, 0);
                    }
                    else {
                        _data.writeInt(0);
                    }
                    mRemote.transact(Stub.TRANSACTION_hasDevicePermission, _data, _reply, 0);
                    _reply.readException();
                    _result = (0!=_reply.readInt());
                }
                finally {
                    _reply.recycle();
                    _data.recycle();
                }
                return _result;
            }
            /* Returns true if the caller has permission to access the accessory. */
            @Override public boolean hasAccessoryPermission(android.hardware.usb.UsbAccessory accessory) throws android.os.RemoteException
            {
                android.os.Parcel _data = android.os.Parcel.obtain();
                android.os.Parcel _reply = android.os.Parcel.obtain();
                boolean _result;
                try {
                    _data.writeInterfaceToken(DESCRIPTOR);
                    if ((accessory!=null)) {
                        _data.writeInt(1);
                        accessory.writeToParcel(_data, 0);
                    }
                    else {
                        _data.writeInt(0);
                    }
                    mRemote.transact(Stub.TRANSACTION_hasAccessoryPermission, _data, _reply, 0);
                    _reply.readException();
                    _result = (0!=_reply.readInt());
                }
                finally {
                    _reply.recycle();
                    _data.recycle();
                }
                return _result;
            }
            /* Requests permission for the given package to access the device.
                 * Will display a system dialog to query the user if permission
                 * had not already been given.
                 */
            @Override public void requestDevicePermission(android.hardware.usb.UsbDevice device, java.lang.String packageName, android.app.PendingIntent pi) throws android.os.RemoteException
            {
                android.os.Parcel _data = android.os.Parcel.obtain();
                android.os.Parcel _reply = android.os.Parcel.obtain();
                try {
                    _data.writeInterfaceToken(DESCRIPTOR);
                    if ((device!=null)) {
                        _data.writeInt(1);
                        device.writeToParcel(_data, 0);
                    }
                    else {
                        _data.writeInt(0);
                    }
                    _data.writeString(packageName);
                    if ((pi!=null)) {
                        _data.writeInt(1);
                        pi.writeToParcel(_data, 0);
                    }
                    else {
                        _data.writeInt(0);
                    }
                    mRemote.transact(Stub.TRANSACTION_requestDevicePermission, _data, _reply, 0);
                    _reply.readException();
                }
                finally {
                    _reply.recycle();
                    _data.recycle();
                }
            }
            /* Requests permission for the given package to access the accessory.
                 * Will display a system dialog to query the user if permission
                 * had not already been given. Result is returned via pi.
                 */
            @Override public void requestAccessoryPermission(android.hardware.usb.UsbAccessory accessory, java.lang.String packageName, android.app.PendingIntent pi) throws android.os.RemoteException
            {
                android.os.Parcel _data = android.os.Parcel.obtain();
                android.os.Parcel _reply = android.os.Parcel.obtain();
                try {
                    _data.writeInterfaceToken(DESCRIPTOR);
                    if ((accessory!=null)) {
                        _data.writeInt(1);
                        accessory.writeToParcel(_data, 0);
                    }
                    else {
                        _data.writeInt(0);
                    }
                    _data.writeString(packageName);
                    if ((pi!=null)) {
                        _data.writeInt(1);
                        pi.writeToParcel(_data, 0);
                    }
                    else {
                        _data.writeInt(0);
                    }
                    mRemote.transact(Stub.TRANSACTION_requestAccessoryPermission, _data, _reply, 0);
                    _reply.readException();
                }
                finally {
                    _reply.recycle();
                    _data.recycle();
                }
            }
            /* Grants permission for the given UID to access the device */
            @Override public void grantDevicePermission(android.hardware.usb.UsbDevice device, int uid) throws android.os.RemoteException
            {
                android.os.Parcel _data = android.os.Parcel.obtain();
                android.os.Parcel _reply = android.os.Parcel.obtain();
                try {
                    _data.writeInterfaceToken(DESCRIPTOR);
                    if ((device!=null)) {
                        _data.writeInt(1);
                        device.writeToParcel(_data, 0);
                    }
                    else {
                        _data.writeInt(0);
                    }
                    _data.writeInt(uid);
                    mRemote.transact(Stub.TRANSACTION_grantDevicePermission, _data, _reply, 0);
                    _reply.readException();
                }
                finally {
                    _reply.recycle();
                    _data.recycle();
                }
            }
            /* Grants permission for the given UID to access the accessory */
            @Override public void grantAccessoryPermission(android.hardware.usb.UsbAccessory accessory, int uid) throws android.os.RemoteException
            {
                android.os.Parcel _data = android.os.Parcel.obtain();
                android.os.Parcel _reply = android.os.Parcel.obtain();
                try {
                    _data.writeInterfaceToken(DESCRIPTOR);
                    if ((accessory!=null)) {
                        _data.writeInt(1);
                        accessory.writeToParcel(_data, 0);
                    }
                    else {
                        _data.writeInt(0);
                    }
                    _data.writeInt(uid);
                    mRemote.transact(Stub.TRANSACTION_grantAccessoryPermission, _data, _reply, 0);
                    _reply.readException();
                }
                finally {
                    _reply.recycle();
                    _data.recycle();
                }
            }
            /* Returns true if the USB manager has default preferences or permissions for the package */
            @Override public boolean hasDefaults(java.lang.String packageName, int userId) throws android.os.RemoteException
            {
                android.os.Parcel _data = android.os.Parcel.obtain();
                android.os.Parcel _reply = android.os.Parcel.obtain();
                boolean _result;
                try {
                    _data.writeInterfaceToken(DESCRIPTOR);
                    _data.writeString(packageName);
                    _data.writeInt(userId);
                    mRemote.transact(Stub.TRANSACTION_hasDefaults, _data, _reply, 0);
                    _reply.readException();
                    _result = (0!=_reply.readInt());
                }
                finally {
                    _reply.recycle();
                    _data.recycle();
                }
                return _result;
            }
            /* Clears default preferences and permissions for the package */
            @Override public void clearDefaults(java.lang.String packageName, int userId) throws android.os.RemoteException
            {
                android.os.Parcel _data = android.os.Parcel.obtain();
                android.os.Parcel _reply = android.os.Parcel.obtain();
                try {
                    _data.writeInterfaceToken(DESCRIPTOR);
                    _data.writeString(packageName);
                    _data.writeInt(userId);
                    mRemote.transact(Stub.TRANSACTION_clearDefaults, _data, _reply, 0);
                    _reply.readException();
                }
                finally {
                    _reply.recycle();
                    _data.recycle();
                }
            }
            /* Sets the current USB function. */
            @Override public void setCurrentFunction(java.lang.String function, boolean makeDefault) throws android.os.RemoteException
            {
                android.os.Parcel _data = android.os.Parcel.obtain();
                android.os.Parcel _reply = android.os.Parcel.obtain();
                try {
                    _data.writeInterfaceToken(DESCRIPTOR);
                    _data.writeString(function);
                    _data.writeInt(((makeDefault)?(1):(0)));
                    mRemote.transact(Stub.TRANSACTION_setCurrentFunction, _data, _reply, 0);
                    _reply.readException();
                }
                finally {
                    _reply.recycle();
                    _data.recycle();
                }
            }
            /* Sets the file path for USB mass storage backing file. */
            @Override public void setMassStorageBackingFile(java.lang.String path) throws android.os.RemoteException
            {
                android.os.Parcel _data = android.os.Parcel.obtain();
                android.os.Parcel _reply = android.os.Parcel.obtain();
                try {
                    _data.writeInterfaceToken(DESCRIPTOR);
                    _data.writeString(path);
                    mRemote.transact(Stub.TRANSACTION_setMassStorageBackingFile, _data, _reply, 0);
                    _reply.readException();
                }
                finally {
                    _reply.recycle();
                    _data.recycle();
                }
            }
            /* Allow USB debugging from the attached host. If alwaysAllow is true, add the
                 * the public key to list of host keys that the user has approved.
                 */
            @Override public void allowUsbDebugging(boolean alwaysAllow, java.lang.String publicKey) throws android.os.RemoteException
            {
                android.os.Parcel _data = android.os.Parcel.obtain();
                android.os.Parcel _reply = android.os.Parcel.obtain();
                try {
                    _data.writeInterfaceToken(DESCRIPTOR);
                    _data.writeInt(((alwaysAllow)?(1):(0)));
                    _data.writeString(publicKey);
                    mRemote.transact(Stub.TRANSACTION_allowUsbDebugging, _data, _reply, 0);
                    _reply.readException();
                }
                finally {
                    _reply.recycle();
                    _data.recycle();
                }
            }
            /* Deny USB debugging from the attached host */
            @Override public void denyUsbDebugging() throws android.os.RemoteException
            {
                android.os.Parcel _data = android.os.Parcel.obtain();
                android.os.Parcel _reply = android.os.Parcel.obtain();
                try {
                    _data.writeInterfaceToken(DESCRIPTOR);
                    mRemote.transact(Stub.TRANSACTION_denyUsbDebugging, _data, _reply, 0);
                    _reply.readException();
                }
                finally {
                    _reply.recycle();
                    _data.recycle();
                }
            }
            /* Clear public keys installed for secure USB debugging */
            @Override public void clearUsbDebuggingKeys() throws android.os.RemoteException
            {
                android.os.Parcel _data = android.os.Parcel.obtain();
                android.os.Parcel _reply = android.os.Parcel.obtain();
                try {
                    _data.writeInterfaceToken(DESCRIPTOR);
                    mRemote.transact(Stub.TRANSACTION_clearUsbDebuggingKeys, _data, _reply, 0);
                    _reply.readException();
                }
                finally {
                    _reply.recycle();
                    _data.recycle();
                }
            }
        }
        static final int TRANSACTION_getDeviceList = (android.os.IBinder.FIRST_CALL_TRANSACTION + 0);
        static final int TRANSACTION_openDevice = (android.os.IBinder.FIRST_CALL_TRANSACTION + 1);
        static final int TRANSACTION_getCurrentAccessory = (android.os.IBinder.FIRST_CALL_TRANSACTION + 2);
        static final int TRANSACTION_openAccessory = (android.os.IBinder.FIRST_CALL_TRANSACTION + 3);
        static final int TRANSACTION_setDevicePackage = (android.os.IBinder.FIRST_CALL_TRANSACTION + 4);
        static final int TRANSACTION_setAccessoryPackage = (android.os.IBinder.FIRST_CALL_TRANSACTION + 5);
        static final int TRANSACTION_hasDevicePermission = (android.os.IBinder.FIRST_CALL_TRANSACTION + 6);
        static final int TRANSACTION_hasAccessoryPermission = (android.os.IBinder.FIRST_CALL_TRANSACTION + 7);
        static final int TRANSACTION_requestDevicePermission = (android.os.IBinder.FIRST_CALL_TRANSACTION + 8);
        static final int TRANSACTION_requestAccessoryPermission = (android.os.IBinder.FIRST_CALL_TRANSACTION + 9);
        static final int TRANSACTION_grantDevicePermission = (android.os.IBinder.FIRST_CALL_TRANSACTION + 10);
        static final int TRANSACTION_grantAccessoryPermission = (android.os.IBinder.FIRST_CALL_TRANSACTION + 11);
        static final int TRANSACTION_hasDefaults = (android.os.IBinder.FIRST_CALL_TRANSACTION + 12);
        static final int TRANSACTION_clearDefaults = (android.os.IBinder.FIRST_CALL_TRANSACTION + 13);
        static final int TRANSACTION_setCurrentFunction = (android.os.IBinder.FIRST_CALL_TRANSACTION + 14);
        static final int TRANSACTION_setMassStorageBackingFile = (android.os.IBinder.FIRST_CALL_TRANSACTION + 15);
        static final int TRANSACTION_allowUsbDebugging = (android.os.IBinder.FIRST_CALL_TRANSACTION + 16);
        static final int TRANSACTION_denyUsbDebugging = (android.os.IBinder.FIRST_CALL_TRANSACTION + 17);
        static final int TRANSACTION_clearUsbDebuggingKeys = (android.os.IBinder.FIRST_CALL_TRANSACTION + 18);
    }
    /* Returns a list of all currently attached USB devices */
    public void getDeviceList(android.os.Bundle devices) throws android.os.RemoteException;
    /* Returns a file descriptor for communicating with the USB device.
         * The native fd can be passed to usb_device_new() in libusbhost.
         */
    public android.os.ParcelFileDescriptor openDevice(java.lang.String deviceName) throws android.os.RemoteException;
    /* Returns the currently attached USB accessory */
    public android.hardware.usb.UsbAccessory getCurrentAccessory() throws android.os.RemoteException;
    /* Returns a file descriptor for communicating with the USB accessory.
         * This file descriptor can be used with standard Java file operations.
         */
    public android.os.ParcelFileDescriptor openAccessory(android.hardware.usb.UsbAccessory accessory) throws android.os.RemoteException;
    /* Sets the default package for a USB device
         * (or clears it if the package name is null)
         */
    public void setDevicePackage(android.hardware.usb.UsbDevice device, java.lang.String packageName, int userId) throws android.os.RemoteException;
    /* Sets the default package for a USB accessory
         * (or clears it if the package name is null)
         */
    public void setAccessoryPackage(android.hardware.usb.UsbAccessory accessory, java.lang.String packageName, int userId) throws android.os.RemoteException;
    /* Returns true if the caller has permission to access the device. */
    public boolean hasDevicePermission(android.hardware.usb.UsbDevice device) throws android.os.RemoteException;
    /* Returns true if the caller has permission to access the accessory. */
    public boolean hasAccessoryPermission(android.hardware.usb.UsbAccessory accessory) throws android.os.RemoteException;
    /* Requests permission for the given package to access the device.
         * Will display a system dialog to query the user if permission
         * had not already been given.
         */
    public void requestDevicePermission(android.hardware.usb.UsbDevice device, java.lang.String packageName, android.app.PendingIntent pi) throws android.os.RemoteException;
    /* Requests permission for the given package to access the accessory.
         * Will display a system dialog to query the user if permission
         * had not already been given. Result is returned via pi.
         */
    public void requestAccessoryPermission(android.hardware.usb.UsbAccessory accessory, java.lang.String packageName, android.app.PendingIntent pi) throws android.os.RemoteException;
    /* Grants permission for the given UID to access the device */
    public void grantDevicePermission(android.hardware.usb.UsbDevice device, int uid) throws android.os.RemoteException;
    /* Grants permission for the given UID to access the accessory */
    public void grantAccessoryPermission(android.hardware.usb.UsbAccessory accessory, int uid) throws android.os.RemoteException;
    /* Returns true if the USB manager has default preferences or permissions for the package */
    public boolean hasDefaults(java.lang.String packageName, int userId) throws android.os.RemoteException;
    /* Clears default preferences and permissions for the package */
    public void clearDefaults(java.lang.String packageName, int userId) throws android.os.RemoteException;
    /* Sets the current USB function. */
    public void setCurrentFunction(java.lang.String function, boolean makeDefault) throws android.os.RemoteException;
    /* Sets the file path for USB mass storage backing file. */
    public void setMassStorageBackingFile(java.lang.String path) throws android.os.RemoteException;
    /* Allow USB debugging from the attached host. If alwaysAllow is true, add the
         * the public key to list of host keys that the user has approved.
         */
    public void allowUsbDebugging(boolean alwaysAllow, java.lang.String publicKey) throws android.os.RemoteException;
    /* Deny USB debugging from the attached host */
    public void denyUsbDebugging() throws android.os.RemoteException;
    /* Clear public keys installed for secure USB debugging */
    public void clearUsbDebuggingKeys() throws android.os.RemoteException;
} 

3）建立android.os.ServiceManager.java替换源码

package android.os;

import java.util.Map;

public final class ServiceManager
{
    public static IBinder getService( String name )
    {
        throw new RuntimeException( "Stub!" );
    }

    /**
     * Place a new @a service called @a name into the service
     * manager.
     *
     * @param name the name of the new service
     * @param service the service object
     */
    public static void addService( String name, IBinder service )
    {
        throw new RuntimeException( "Stub!" );
    }

    /**
     * Retrieve an existing service called @a name from the
     * service manager.  Non-blocking.
     */
    public static IBinder checkService( String name )
    {
        throw new RuntimeException( "Stub!" );
    }

    public static String[] listServices() throws RemoteException
    {
        throw new RuntimeException( "Stub!" );
    }

    /**
     * This is only intended to be called when the process is first being brought
     * up and bound by the activity manager. There is only one thread in the process
     * at that time, so no locking is done.
     *
     * @param cache the cache of service references
     * @hide
     */
    public static void initServiceCache( Map cache )
    {
        throw new RuntimeException( "Stub!" );
    }
}

4）建立响应app申请的BroadcastReceiver类，com.harvbot.usbpermissionissuer.LaunchReceiver.java

package com.harvbot.usbpermissionissuer;

import java.io.IOException;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;

import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.pm.ApplicationInfo;
import android.content.pm.PackageManager;
import android.content.res.XmlResourceParser;
import android.hardware.usb.IUsbManager;
import android.hardware.usb.UsbDevice;
import android.hardware.usb.UsbManager;
import android.os.IBinder;
import android.os.ServiceManager;
import android.text.TextUtils;
import android.util.Log;

import org.json.JSONObject;
import org.xmlpull.v1.XmlPullParserException;

import com.harvbot.usbpermissionissuer.logging.LogManager;

public class LaunchReceiver extends BroadcastReceiver
{
    private final String TAG = "com.harvbot.usb";

    private final String ACTION_USB_PERMISSION_ISSUER = "ACTION_USB_PERMISSION_ISSUER";

    private LogManager logger;

    public void onReceive( Context context, Intent intent )
    {
        logger = new LogManager(context);

        String action = intent.getAction();
        if( action != null && action.equals( ACTION_USB_PERMISSION_ISSUER ) )
        {
            logger.log("Receiver event processing.");
            try {
                UsbDeviceDescriptor deviceFilter = new UsbDeviceDescriptor();
                deviceFilter.packageName = intent.getStringExtra("packageName");
                deviceFilter.vendorId = intent.getIntExtra("vendorId", -1);
                deviceFilter.productId = intent.getIntExtra("productId", -1);
                deviceFilter.deviceClass = intent.getIntExtra("deviceClass", -1);
                deviceFilter.deviceSubclass = intent.getIntExtra("deviceSubclass", -1);

                if(TextUtils.isEmpty(deviceFilter.packageName)){
                    logger.log("PackageName is Null");
                    return;
                }

                PackageManager pm = context.getPackageManager();
                ApplicationInfo ai = pm.getApplicationInfo(deviceFilter.packageName, 0);

                UsbManager manager = (UsbManager) context.getSystemService(Context.USB_SERVICE);
                IBinder b = ServiceManager.getService(Context.USB_SERVICE);
                IUsbManager service = IUsbManager.Stub.asInterface(b);
                HashMap deviceList = manager.getDeviceList();

                logger.log("List of usb devices was loaded. Number of attached devices: " +
                        new Integer(deviceList.size()).toString());

                if((deviceFilter.deviceClass != -1 && deviceFilter.deviceSubclass != -1) ||
                        (deviceFilter.productId != -1 && deviceFilter.vendorId != -1)) {

                    logger.log("The usb permission will be granted for application " + ai.packageName);

                    Iterator deviceIterator = deviceList.values().iterator();
                    while (deviceIterator.hasNext()) {
                        UsbDevice device = deviceIterator.next();

                        if ((device.getDeviceClass() == deviceFilter.deviceClass &&
                                device.getDeviceSubclass() == deviceFilter.deviceSubclass) ||
                                (device.getVendorId() == deviceFilter.vendorId &&
                                        device.getProductId() == deviceFilter.productId)) {

                            try {
                                service.grantDevicePermission(device, ai.uid);
                                service.setDevicePackage(device, ai.packageName, ai.uid);

                                logger.log("Usb permission is granted for application " +
                                        ai.packageName + " for device " + device.toString() +
                                        " and user " + ai.uid + " is granted");
                            } catch (SecurityException se) {
                                logger.log(se.toString());
                                Log.e(TAG, se.toString());
                            }
                        }

                    }
                } else {
                    logger.log("Device params is Error "+deviceFilter.toString());
                }
            }
            catch(Exception e)
            {
                logger.log(e.toString());
                Log.e(TAG, e.toString());
            }
        }
    }
}

额外需要的UsbDeviceDescriptor.java和StubService.java一并给出，日志实现自行替换

package com.harvbot.usbpermissionissuer;

//二选一，确定USB设备
public class UsbDeviceDescriptor {

    public String packageName;

    //第一组，确定USB设备
    public int deviceClass;
    public int deviceSubclass;
    //第二级，确定USB设备
    public int vendorId;
    public int productId;

    @Override
    public String toString() {
        return "packageName:" + packageName
                + ", deviceClass:" + deviceClass
                + ", deviceSubclass: " + deviceSubclass
                + ", vendorId: " + vendorId
                + ", productId: " + productId;
    }

}

package com.harvbot.usbpermissionissuer;

import android.app.Service;
import android.content.Intent;
import android.os.IBinder;
import android.util.Log;
import android.widget.Toast;


public class StubService extends Service
{
    private static final String TAG = "StubService";
    @Override
    public IBinder onBind(Intent intent) {
        return null;
    }
    public void onDestroy() {
        Log.d(TAG, "onDestroy");
    }

    @Override
    public void onStart(Intent intent, int startid)
    {
        Log.d(TAG, "onStart");
    }
}

5）以上关键文件工程化后生成usb-permission-issuer.apk,需要将其拷贝到android系统下的/system/prv-app目录下（该目录是系统预装apk路径），并修改其文件权限，例如777

备注：我的做法是直接下载了“kingroot”和“RE文件管理”，安装后，使用“kingroot”给“RE文件管理”开启root权限，然后通过“RE文件管理”将“usb-permission-issuer.apk”拷贝到/system/prv-app目录下，并修改其文件权限（选择文件长按，RE文件管理会出现更多功能菜单，里面有权限修改）

6）在需要的app进行动态广播申请，实例如下：

    private void UsbInit()
    {
        UsbInitPermission(1);
        try {
        Thread.sleep(100);
        } catch (InterruptedException e) {
        e.printStackTrace();
        }
        UsbInitPermission(2);
        try {
        Thread.sleep(100);
        } catch (InterruptedException e) {
        e.printStackTrace();
        }
        UsbInitPermission(3);
        try {
        Thread.sleep(100);
        } catch (InterruptedException e) {
        e.printStackTrace();
        }
        UsbInitPermission(4);
        try {
        Thread.sleep(100);
        } catch (InterruptedException e) {
        e.printStackTrace();
        }
    }

    static final String YOUR_APP_PACKAGE_NAMESPACE = "你的app-package";
    static final String ACTION_USB_PERMISSION_APP =  "ACTION_USB_PERMISSION_ISSUER";
    private void UsbInitPermission(int id)
    {
        Intent intent_usb = new Intent();
        intent_usb.setAction(ACTION_USB_PERMISSION_APP);
        intent_usb.putExtra("packageName", YOUR_APP_PACKAGE_NAMESPACE);
         //device_filter.xml里的字段
        intent_usb.putExtra("vendorId", 1659);
        switch(id)
        {
        case 1:
        intent_usb.putExtra("productId", 8963);
        break;
        case 2:
        intent_usb.putExtra("productId", 9553);
        break;
        case 3:
        intent_usb.putExtra("productId", 8964);
        break;
        case 4:
        intent_usb.putExtra("productId", 9475);
        break;
        }
        //发送广播
        sendBroadcast(intent_usb);
    }

然后再合适的地方调用UsbInit(),等待一段时间后会获得授权，再使用你的USB，这样就不会再有USB授权对话框弹出

7）如果懒得编译授权的apk，可以直接采用https://download.csdn.net/download/py8105/10313534，再完成5、6步骤。