안드로이드에서 어플리케이션(이하 App)을 설치하거나 삭제할 때는 그 이벤트가 Broadcast로 전달됩니다. 즉, BroadcastReceiver를 등록해놓은 각 App들의 설치/삭제 이벤트를 수신할 수 있습니다.

AndroidManifest.xml

manifest.xml에 다음과 같이 BroadcastReceiver를 추가해줍니다.

<receiver android:name=".PackageEventReceiver">
    <intent-filter>
        <action android:name="android.intent.action.PACKAGE_ADDED"/>
        <action android:name="android.intent.action.PACKAGE_REMOVED"/>
        <action android:name="android.intent.action.PACKAGE_REPLACED"/>
        <data android:scheme="package"/>
    </intent-filter>
</receiver>

PackageEventReceiver.java

import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;

import android.util.Log;

public class PackageEventReceiver extends BroadcastReceiver {

  @Override
  public void onReceive(Context context, Intent intent) {
    String packageName = intent.getData().getSchemeSpecificPart();
    String action = intent.getAction();

    if(action.equals(Intent.ACTION_PACKAGE_ADDED)) {
      Log.d("", "[snowdeer] Package ADDED : " + packageName);
    } else if(action.equals(Intent.ACTION_PACKAGE_REMOVED)) {
      Log.d("", "[snowdeer] Package REMOVED : " + packageName);
    }
  }
}

Event Receiver 등록

private PackageEventReceiver mPackageEventReceiver = new PackageEventReceiver();

private void registerPackageEventReceiver() {
  registerReceiver(mPackageEventReceiver, new IntentFilter(Intent.ACTION_PACKAGE_ADDED));
}

또는 다음과 같은 코드를 이용해서 등록하면 됩니다.

private PackageEventReceiver mPackageEventReceiver = new PackageEventReceiver();

private void registerPackageEventReceiver() {
  IntentFilter intentFilter = new IntentFilter();
  intentFilter.addAction(Intent.ACTION_PACKAGE_ADDED);
  intentFilter.addAction(Intent.ACTION_PACKAGE_INSTALL);
  intentFilter.addDataScheme("package");
  registerReceiver(mPackageEventReceiver, intentFilter);
}