Magisk/app/src/main/java/com/topjohnwu/magisk/asyncs/HideManager.java

package com.topjohnwu.magisk.asyncs;

import android.content.Context;
import android.content.pm.PackageManager;
import android.widget.Toast;

import com.topjohnwu.magisk.MagiskManager;
import com.topjohnwu.magisk.R;
import com.topjohnwu.magisk.superuser.Policy;
import com.topjohnwu.magisk.utils.Utils;
import com.topjohnwu.magisk.utils.ZipUtils;

import java.io.File;
import java.util.List;

public class HideManager extends ParallelTask<Void, Void, Boolean> {

    public HideManager(Context context) {
        super(context);
    }

    @Override
    protected void onPreExecute() {
        getMagiskManager().toast(R.string.hide_manager_toast, Toast.LENGTH_SHORT);
    }

    @Override
    protected Boolean doInBackground(Void... voids) {
        MagiskManager magiskManager = getMagiskManager();
        if (magiskManager == null)
            return false;

        // Generate a new unhide app with random package name
        File unhideAPK = new File(magiskManager.getCacheDir(), "unhide.apk");
        String pkg = ZipUtils.generateUnhide(magiskManager, unhideAPK);

        // Install the application
        List<String> ret = getShell().su("pm install " + unhideAPK + ">/dev/null && echo true || echo false");
        unhideAPK.delete();
        if (!Utils.isValidShellResponse(ret) || !Boolean.parseBoolean(ret.get(0)))
            return false;

        try {
            // Allow the application to gain root by default
            PackageManager pm = magiskManager.getPackageManager();
            int uid = pm.getApplicationInfo(pkg, 0).uid;
            Policy policy = new Policy(uid, pm);
            policy.policy = Policy.ALLOW;
            policy.notification = false;
            policy.logging = false;
            magiskManager.suDB.addPolicy(policy);
        } catch (PackageManager.NameNotFoundException e) {
            e.printStackTrace();
            return false;
        }

        // Hide myself!
        getShell().su_raw("pm hide " + magiskManager.getPackageName());
        return true;
    }

    @Override
    protected void onPostExecute(Boolean b) {
        MagiskManager magiskManager = getMagiskManager();
        if (magiskManager == null)
            return;
        if (!b) {
            magiskManager.toast(R.string.hide_manager_fail_toast, Toast.LENGTH_LONG);
        }
        super.onPostExecute(b);
    }
}