Code that will install and remove apks from an Android device without user interaction

AndroidManifest.xml

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.packagemanager.poc"
    android:versionCode="1"
    android:versionName="1.0" >

    <uses-sdk android:minSdkVersion="8" />
    
    <uses-permission android:name="android.permission.INSTALL_PACKAGES" />
    <uses-permission android:name="android.permission.DELETE_PACKAGES" />
    
    <application
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name" >
        <activity
            android:name=".PackageManagerActivity"
            android:label="@string/app_name" >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />
                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
    </application>

</manifest>

IPackageDeleteObserver.java

/*
 * This file is auto-generated.  DO NOT MODIFY.
 * Original file: /Users/fuzion24/Development/workspace/PackageManager/src/android/content/pm/IPackageDeleteObserver.aidl
 */
package android.content.pm;
/**
 * API for deletion callbacks from the Package Manager.
 *
 * {@hide}
 */
public interface IPackageDeleteObserver extends android.os.IInterface
{
/** Local-side IPC implementation stub class. */
public static abstract class Stub extends android.os.Binder implements android.content.pm.IPackageDeleteObserver
{
private static final java.lang.String DESCRIPTOR = "android.content.pm.IPackageDeleteObserver";
/** Construct the stub at attach it to the interface. */
public Stub()
{
this.attachInterface(this, DESCRIPTOR);
}
/**
 * Cast an IBinder object into an android.content.pm.IPackageDeleteObserver interface,
 * generating a proxy if needed.
 */
public static android.content.pm.IPackageDeleteObserver asInterface(android.os.IBinder obj)
{
if ((obj==null)) {
return null;
}
android.os.IInterface iin = (android.os.IInterface)obj.queryLocalInterface(DESCRIPTOR);
if (((iin!=null)&&(iin instanceof android.content.pm.IPackageDeleteObserver))) {
return ((android.content.pm.IPackageDeleteObserver)iin);
}
return new android.content.pm.IPackageDeleteObserver.Stub.Proxy(obj);
}
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_packageDeleted:
{
data.enforceInterface(DESCRIPTOR);
boolean _arg0;
_arg0 = (0!=data.readInt());
this.packageDeleted(_arg0);
return true;
}
}
return super.onTransact(code, data, reply, flags);
}
private static class Proxy implements android.content.pm.IPackageDeleteObserver
{
private android.os.IBinder mRemote;
Proxy(android.os.IBinder remote)
{
mRemote = remote;
}
public android.os.IBinder asBinder()
{
return mRemote;
}
public java.lang.String getInterfaceDescriptor()
{
return DESCRIPTOR;
}
public void packageDeleted(boolean succeeded) throws android.os.RemoteException
{
android.os.Parcel _data = android.os.Parcel.obtain();
try {
_data.writeInterfaceToken(DESCRIPTOR);
_data.writeInt(((succeeded)?(1):(0)));
mRemote.transact(Stub.TRANSACTION_packageDeleted, _data, null, android.os.IBinder.FLAG_ONEWAY);
}
finally {
_data.recycle();
}
}
}
static final int TRANSACTION_packageDeleted = (android.os.IBinder.FIRST_CALL_TRANSACTION + 0);
}
public void packageDeleted(boolean succeeded) throws android.os.RemoteException;
}

IPackageInstallObserver.java

/*
 * This file is auto-generated.  DO NOT MODIFY.
 * Original file: /Users/fuzion24/Development/workspace/PackageManager/src/android/content/pm/IPackageDeleteObserver.aidl
 */
package android.content.pm;
/**
 * API for deletion callbacks from the Package Manager.
 *
 * {@hide}
 */
public interface IPackageDeleteObserver extends android.os.IInterface
{
/** Local-side IPC implementation stub class. */
public static abstract class Stub extends android.os.Binder implements android.content.pm.IPackageDeleteObserver
{
private static final java.lang.String DESCRIPTOR = "android.content.pm.IPackageDeleteObserver";
/** Construct the stub at attach it to the interface. */
public Stub()
{
this.attachInterface(this, DESCRIPTOR);
}
/**
 * Cast an IBinder object into an android.content.pm.IPackageDeleteObserver interface,
 * generating a proxy if needed.
 */
public static android.content.pm.IPackageDeleteObserver asInterface(android.os.IBinder obj)
{
if ((obj==null)) {
return null;
}
android.os.IInterface iin = (android.os.IInterface)obj.queryLocalInterface(DESCRIPTOR);
if (((iin!=null)&&(iin instanceof android.content.pm.IPackageDeleteObserver))) {
return ((android.content.pm.IPackageDeleteObserver)iin);
}
return new android.content.pm.IPackageDeleteObserver.Stub.Proxy(obj);
}
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_packageDeleted:
{
data.enforceInterface(DESCRIPTOR);
boolean _arg0;
_arg0 = (0!=data.readInt());
this.packageDeleted(_arg0);
return true;
}
}
return super.onTransact(code, data, reply, flags);
}
private static class Proxy implements android.content.pm.IPackageDeleteObserver
{
private android.os.IBinder mRemote;
Proxy(android.os.IBinder remote)
{
mRemote = remote;
}
public android.os.IBinder asBinder()
{
return mRemote;
}
public java.lang.String getInterfaceDescriptor()
{
return DESCRIPTOR;
}
public void packageDeleted(boolean succeeded) throws android.os.RemoteException
{
android.os.Parcel _data = android.os.Parcel.obtain();
try {
_data.writeInterfaceToken(DESCRIPTOR);
_data.writeInt(((succeeded)?(1):(0)));
mRemote.transact(Stub.TRANSACTION_packageDeleted, _data, null, android.os.IBinder.FLAG_ONEWAY);
}
finally {
_data.recycle();
}
}
}
static final int TRANSACTION_packageDeleted = (android.os.IBinder.FIRST_CALL_TRANSACTION + 0);
}
public void packageDeleted(boolean succeeded) throws android.os.RemoteException;
}

PackageManagerActivity.java

package com.packagemanager.poc;

import java.io.File;
import java.lang.reflect.Method;

import android.app.Activity;
import android.content.pm.IPackageDeleteObserver;
import android.content.pm.IPackageInstallObserver;
import android.content.pm.PackageManager;
import android.os.Bundle;
import android.net.Uri;

public class PackageManagerActivity extends Activity {

    public static final int INSTALL_REPLACE_EXISTING = 0x00000002;
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
    	String fileName = "/sdcard/test.apk";
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        installPackage(fileName);
    }
    
    public void installPackage(String fileName){
    	try {
			PackageManager pkgManager = getPackageManager();
			Method installPackage = pkgManager.getClass().getMethod("installPackage", android.net.Uri.class, IPackageInstallObserver.class ,int.class,java.lang.String.class);
			Uri androidAPK = Uri.fromFile(new File(fileName));
			Object[] params = new Object[] { androidAPK, null, INSTALL_REPLACE_EXISTING, "" };
			installPackage.invoke(pkgManager, params);
		} catch (Exception e) {
			e.printStackTrace();
		}
    }
    
    public void deletePackage(String packageName){
    	try {
			PackageManager pkgManager = getPackageManager();
			Method deletePackage = pkgManager.getClass().getMethod("installPackage",String[].class, IPackageDeleteObserver.class, int.class);
			Object[] params = new Object[] {packageName, null, 0 };
			deletePackage.invoke(pkgManager, params);
		} catch (Exception e) {
			e.printStackTrace();
		}
    }
}

Why is IPackageInstallObserver look like this?

public interface IPackageDeleteObserver extends android.os.IInterface{ ... }
Why is it similar to IPackageDeleteObserver?

I am using rooted device and made my app as system app. Install is properly working but Uninstall is not working at all. I am using android version 7.1.2 and device model is Moto E3 Power.

Hi, found this interesting, but a little confused.
Do I need to copy all this files into my project then run it right?

IPackageInstallObserver.java also has the definition of IPackageDeleteObserver inside,

`/*

• This file is auto-generated. DO NOT MODIFY.
• Original file: frameworks/base/core/java/android/content/pm/IPackageInstallObserver.aidl
  /
  package android.content.pm;
  /*
• API for installation callbacks from the Package Manager.
• @hide
  /
  public interface IPackageInstallObserver extends android.os.IInterface
  {
  /* Local-side IPC implementation stub class. /
  public static abstract class Stub extends android.os.Binder implements android.content.pm.IPackageInstallObserver
  {
  private static final java.lang.String DESCRIPTOR = "android.content.pm.IPackageInstallObserver";
  /* Construct the stub at attach it to the interface. /
  public Stub()
  {
  this.attachInterface(this, DESCRIPTOR);
  }
  /*
• Cast an IBinder object into an android.content.pm.IPackageInstallObserver interface,
• generating a proxy if needed.
  */
  public static android.content.pm.IPackageInstallObserver asInterface(android.os.IBinder obj)
  {
  if ((obj==null)) {
  return null;
  }
  android.os.IInterface iin = (android.os.IInterface)obj.queryLocalInterface(DESCRIPTOR);
  if (((iin!=null)&&(iin instanceof android.content.pm.IPackageInstallObserver))) {
  return ((android.content.pm.IPackageInstallObserver)iin);
  }
  return new android.content.pm.IPackageInstallObserver.Stub.Proxy(obj);
  }
  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_packageInstalled:
  {
  data.enforceInterface(DESCRIPTOR);
  java.lang.String _arg0;
  _arg0 = data.readString();
  int _arg1;
  _arg1 = data.readInt();
  this.packageInstalled(_arg0, _arg1);
  return true;
  }
  }
  return super.onTransact(code, data, reply, flags);
  }
  private static class Proxy implements android.content.pm.IPackageInstallObserver
  {
  private android.os.IBinder mRemote;
  Proxy(android.os.IBinder remote)
  {
  mRemote = remote;
  }
  public android.os.IBinder asBinder()
  {
  return mRemote;
  }
  public java.lang.String getInterfaceDescriptor()
  {
  return DESCRIPTOR;
  }
  public void packageInstalled(java.lang.String packageName, int returnCode) throws android.os.RemoteException
  {
  android.os.Parcel _data = android.os.Parcel.obtain();
  try {
  _data.writeInterfaceToken(DESCRIPTOR);
  _data.writeString(packageName);
  _data.writeInt(returnCode);
  mRemote.transact(Stub.TRANSACTION_packageInstalled, _data, null, android.os.IBinder.FLAG_ONEWAY);
  }
  finally {
  _data.recycle();
  }
  }
  }
  static final int TRANSACTION_packageInstalled = (android.os.IBinder.FIRST_CALL_TRANSACTION + 0);
  }
  public void packageInstalled(java.lang.String packageName, int returnCode) throws android.os.RemoteException;
  }`

I am using rooted device and made my app as system app. Install is properly working but Uninstall is not working at all. I am using android version 7.1.2 and device model is Moto E3 Power.

will help me with this ?

i am using rooted device but its not working.