boolean shouldAbortBackgroundActivityStart(int callingUid, int callingPid,
            final String callingPackage, int realCallingUid, int realCallingPid,
            WindowProcessController callerApp, PendingIntentRecord originatingPendingIntent,
            boolean allowBackgroundActivityStart, Intent intent) {
        .....
        //cczheng add for custom app can backgroundstartActivity S
        if(ActivityBackgroundStartCheckUtil.isCustomMadeApp(callingPackage, intent)){
            Slog.w(TAG, "Background activity start for CustomMadeApp ,ignored");
            return false;
        }
    //E
        // don't abort if the callingUid is the device owner
        if (mService.isDeviceOwner(callingUid)) {
            return false;
        }
        .....
        // don't abort if the callingUid has SYSTEM_ALERT_WINDOW permission
        if (mService.hasSystemAlertWindowPermission(callingUid, callingPid, callingPackage)) {
            Slog.w(TAG, "Background activity start for " + callingPackage
                    + " allowed because SYSTEM_ALERT_WINDOW permission is granted.");
            return false;
        }
        // anything that has fallen through would currently be aborted
        Slog.w(TAG, "Background activity start [callingPackage: " + callingPackage
                + "; callingUid: " + callingUid
                + "; isCallingUidForeground: " + isCallingUidForeground
                + "; isCallingUidPersistentSystemProcess: " + isCallingUidPersistentSystemProcess
                + "; realCallingUid: " + realCallingUid
                + "; isRealCallingUidForeground: " + isRealCallingUidForeground
                + "; isRealCallingUidPersistentSystemProcess: "
                + isRealCallingUidPersistentSystemProcess
                + "; originatingPendingIntent: " + originatingPendingIntent
                + "; isBgStartWhitelisted: " + allowBackgroundActivityStart
                + "; intent: " + intent
                + "; callerApp: " + callerApp
                + "]");
        // log aborted activity start to TRON
        if (mService.isActivityStartsLoggingEnabled()) {
            mSupervisor.getActivityMetricsLogger().logAbortedBgActivityStart(intent, callerApp,
                    callingUid, callingPackage, callingUidProcState, callingUidHasAnyVisibleWindow,
                    realCallingUid, realCallingUidProcState, realCallingUidHasAnyVisibleWindow,
                    (originatingPendingIntent != null));
        }
        return true;
    }

package com.android.server.wm;
import android.content.Context;
import android.content.Intent;
import android.os.Environment;
import android.os.Process;
import android.text.TextUtils;
import android.util.Log;
import com.android.internal.util.ArrayUtils;
import java.io.BufferedReader;
import java.io.File;
import java.io.FileReader;
import java.io.IOException;
import java.util.HashSet;
public class ActivityBackgroundStartCheckUtil{
    private static String TAG = "ActivityBackgroundStartCheckUtil";
    //copy from vendor\mediatek\proprietary\frameworks\base\services\core\java\com\mediatek\server\pm\PmsExtImpl.java
    private static final File GRANT_SYS_APP_LIST_SYSTEM = Environment
            .buildPath(Environment.getRootDirectory(), "etc", "permissions",
                    "pms_sysapp_grant_permission_list.txt");
    private static HashSet<String> mCustomMadeAppSet = new HashSet<String>();
    private static String CustomeKey[] = {"android", "call"};
    public static boolean isCustomMadeApp(String callingPackage, Intent intent){
        sGetGrantSystemAppFromFile(mCustomMadeAppSet, GRANT_SYS_APP_LIST_SYSTEM);
        Log.d(TAG, "isCustomMadeApp callingPackage="+callingPackage);
        try {
            String packageName = intent.getComponent().getPackageName();
            String className = intent.getComponent().getClassName();
            if (mCustomMadeAppSet.contains(callingPackage) ||
                mCustomMadeAppSet.contains(packageName)) {
                return true;     
            }
            for (String key : CustomeKey) {
                if (className.contains(key)) {
                    return true; 
                }
            }
        } catch (Exception e) {
            //e.printStackTrace();
            Log.d(TAG, e.getMessage());
        }
        return false;
    }
    /**
     * Get removable system app list from config file
     *
     * @param resultSet
     *            Returned result list
     * @param file
     *            The config file
     */
    private static void sGetGrantSystemAppFromFile(
            HashSet<String> resultSet, File file) {
        resultSet.clear();
        FileReader fr = null;
        BufferedReader br = null;
        try {
            if (file.exists()) {
                fr = new FileReader(file);
            } else {
                Log.d(TAG, "file in " + file + " does not exist!");
                return;
            }
            br = new BufferedReader(fr);
            String line;
            while ((line = br.readLine()) != null) {
                line = line.trim();
                if (!TextUtils.isEmpty(line)) {
                    Log.d(TAG, "read line " + line);
                    resultSet.add(line);
                }
            }
            Log.e(TAG,"GRANT_SYS_APP_LIST_SYSTEM size="+resultSet.size());
        } catch (Exception io) {
            Log.d(TAG, io.getMessage());
        } finally {
            try {
                if (br != null) {
                    br.close();
                }
                if (fr != null) {
                    fr.close();
                }
            } catch (IOException io) {
                Log.d(TAG, io.getMessage());
            }
        }
    }
}