修改记录
1.安装器

//Installer.java
package com.kte.interfacesettings.service;

import java.io.IOException;
import java.io.InputStream;
import android.content.Context;
import android.content.Intent;
import android.util.Log;
import android.content.pm.IPackageInstallerCallback;
import java.io.File;
import android.os.RemoteException;
import java.io.FileInputStream;
import java.io.OutputStream;
import android.app.PendingIntent;
import android.content.pm.PackageInstaller;
import android.content.pm.PackageInstaller.SessionInfo;
import android.content.pm.PackageParser;
import android.content.pm.IPackageInstaller;
import android.os.ServiceManager;
import com.android.internal.content.PackageHelper;
import android.os.UserHandle;
import android.app.ActivityManager;
import android.os.Binder;
import android.content.pm.IPackageManager;

public class Ins