Android programming method to monitor APK installation and deletion processes

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public class getBroadcast extends BroadcastReceiver {
    @Override
    public void onReceive(Context context, Intent intent) {
         if(Intent.ACTION_PACKAGE_ADDED.equals(())){
          (context, "Applications have been added", Toast.LENGTH_LONG).show();
      }
        else if(Intent.ACTION_PACKAGE_REMOVED.equals(())){
          (context, "Applications have been deleted", Toast.LENGTH_LONG).show();
      }
       /* else if(Intent.ACTION_PACKAGE_CHANGED.equals(())){
           (context, "The application has been changed", Toast.LENGTH_LONG).show();
       }*/
        else if(Intent.ACTION_PACKAGE_REPLACED.equals(())){
          (context, "Applications are replaced", Toast.LENGTH_LONG).show();
      }
        /* else if(Intent.ACTION_PACKAGE_RESTARTED.equals(())){
           (context, "Application has been restarted", Toast.LENGTH_LONG).show();
       }*/
       /* else if(Intent.ACTION_PACKAGE_INSTALL.equals(())){
           (context, "The application is installed", Toast.LENGTH_LONG).show();
       }*/
    }
}

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:andro
   package=""
   android:versionCode="1"
   android:versionName="1.0">
  <application android:icon="@drawable/icon" android:label="@string/app_name">
    <activity android:name=".Broadcast"
         android:label="@string/app_name">
      <intent-filter>
        <action android:name="" />
        <category android:name="" />
      </intent-filter>
    </activity>
   <receiver android:name="getBroadcast" android:enabled="true" >
     <intent-filter>
     <action android:name=".PACKAGE_ADDED"></action>
     <!-- <action android:name=".PACKAGE_CHANGED"></action>-->
     <action android:name=".PACKAGE_REMOVED"></action>
     <action android:name=".PACKAGE_REPLACED"></action>
     <!-- <action android:name=".PACKAGE_RESTARTED"></action>-->
    <!--  <action android:name=".PACKAGE_INSTALL"></action>-->
      <data android:scheme="package"></data>
       </intent-filter>
</receiver>
  </application>
  <uses-sdk android:minSdkVersion="7" />
</manifest>

private final BroadcastReceiver apkInstallListener = new BroadcastReceiver() {
    @Override
    public void onReceive(Context context, Intent intent) {
      if(Intent.ACTION_PACKAGE_ADDED.equals(())){
      ("**************Broadcase*************");
      File file = (isDeleted);
      (()+"*****");
       ();
        //(()+"(*******"+());
       if(uninstallApk!=null&&uApks!=null)
       {
       (isDeleted);
       (isDeleted);
       }
      //Clear the value in the collection        if(uninstallApk!=null)
        {
         ("onpause******"+());
         ();
        }
        if(uApks!=null)
        {
         ();
        }
          ("***Apply Add***"+isDeleted);
       (context, "Applications have been added"+isDeleted, Toast.LENGTH_LONG).show();
      }
        else if(Intent.ACTION_PACKAGE_REMOVED.equals(())){
          ("***app deleted");
         (context, "Applications have been deleted", Toast.LENGTH_LONG).show();
      }
       /* else if(Intent.ACTION_PACKAGE_CHANGED.equals(())){
           (context, "The application has been changed", Toast.LENGTH_LONG).show();
       }*/
        else if(Intent.ACTION_PACKAGE_REPLACED.equals(())){
          ("****app was replaced");
         (context, "Applications are replaced", Toast.LENGTH_LONG).show();
      }
        /* else if(Intent.ACTION_PACKAGE_RESTARTED.equals(())){
           (context, "Application has been restarted", Toast.LENGTH_LONG).show();
       }*/
       /* else if(Intent.ACTION_PACKAGE_INSTALL.equals(())){
           (context, "The application is installed", Toast.LENGTH_LONG).show();
       }*/
  }
};
// Register to monitorprivate void registerSDCardListener(){
    IntentFilter intentFilter = new IntentFilter(Intent.ACTION_MEDIA_MOUNTED);
    (Intent.ACTION_PACKAGE_ADDED);
    (Intent.ACTION_PACKAGE_REMOVED);
    (Intent.ACTION_PACKAGE_REPLACED);
    ("package");
    registerReceiver(apkInstallListener, intentFilter);
}

@Override
protected void onDestroy()
{
 ();
 //unregisterReceiver(apkInstallListener);
}