error: cannot access ActionBarActivity class file for android.support.v7.app.ActionBarActivity not found

Question

package com.infonium.password.ui.activities;


import android.content.DialogInterface;
import android.content.Intent;
import android.content.IntentFilter;
import android.os.Bundle;
import android.provider.Settings;
import android.support.design.widget.Snackbar;
import android.support.v7.app.AlertDialog;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.app.AppCompatCallback;
import android.support.v7.app.AppCompatDialog;
import android.support.v7.app.ActionBar;
import android.view.View;
import android.widget.AdapterView;
import android.widget.Toast;

import com.infonium.password.events.CryptoEvent;
import com.infonium.password.events.DBExportEvent;
import com.infonium.password.runnable.DBExportRunnable;
import com.infonium.password.utils.AppConstants;
import com.infonium.password.utils.ResUtil;
import com.infonium.password.utils.UserDefault;
import com.kenumir.materialsettings.MaterialSettings;
import com.kenumir.materialsettings.items.CheckboxItem;
import com.kenumir.materialsettings.items.HeaderItem;
import com.kenumir.materialsettings.items.SwitcherItem;
import com.kenumir.materialsettings.items.TextItem;
import com.kenumir.materialsettings.storage.StorageInterface;

import de.greenrobot.event.EventBus;
import com.infonium.password.R;
import com.infonium.password.adapters.SettingsSpinnerAdapter;
import com.infonium.password.db.Account;
import com.infonium.password.db.AccountHelper;
import com.infonium.password.events.CryptoEvent;
import com.infonium.password.events.DBExportEvent;
import com.infonium.password.runnable.ChangePasswordRunnable;
import com.infonium.password.runnable.DBExportRunnable;
import com.infonium.password.ui.views.SelectorItem;
import com.infonium.password.utils.AppConstants;
import com.infonium.password.utils.CryptoUtil;
import com.infonium.password.utils.ResUtil;
import com.infonium.password.utils.UserDefault;

import static android.os.Build.VERSION_CODES.M;
import android.support.v7.widget.Toolbar;


/**
 * Created by bob.sun on 16/6/21.
 */
public class SettingsActivity extends MaterialSettings {

    public static final int RequestCodeSetMainPassword = 0x700;
    private TextItem quickSwitcher;
    private SelectorItem selectorItem;
    private AppCompatDialog dialog;
    private boolean didClickedChangeMaster;
    private MaterialSettings ms;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        getSupportActionBar().setDisplayHomeAsUpEnabled(true);
        getSupportActionBar().setTitle(R.string.settings);

        //ms = new MaterialSettings(this);

        EventBus.getDefault().register(this);

        addItem(new HeaderItem(this).setTitle(getString(R.string.security)));
        addItem(new CheckboxItem(this, UserDefault.kNeedPasswordWhenLaunch).setTitle(getString(R.string.need_password_when_launch)).setOnCheckedChangeListener(new CheckboxItem.OnCheckedChangeListener() {
            @Override
            public void onCheckedChange(CheckboxItem cbi, boolean isChecked) {
                UserDefault.getInstance(null).setNeedPasswordWhenLaunch(isChecked);
            }
        }));

        String title = UserDefault.getInstance(null).hasQuickPassword() ? getString(R.string.disable_gesture_lock) : getString(R.string.enable_gesture_lock);

        quickSwitcher = new TextItem(this, "quick_pass").setTitle(title).setOnclick(new TextItem.OnClickListener() {
            @Override
            public void onClick(TextItem textItem) {
                if (UserDefault.getInstance(null).hasQuickPassword()) {
                    UserDefault.getInstance(null).clearQuickPassword();
                    quickSwitcher.updateTitle(getString(R.string.enable_gesture_lock));
                } else {
                    Intent intent = new Intent(SettingsActivity.this, SetQuickPasswordActivity.class);
                    intent.putExtra("type", SetQuickPasswordActivity.ShowTypeSet);
                    startActivityForResult(intent, RequestCodeSetMainPassword);
                }
            }
        });
        addItem(quickSwitcher);

        didClickedChangeMaster = false;
        addItem(new TextItem(this, "change_password").setTitle(getString(R.string.change_master_password)).setOnclick(new TextItem.OnClickListener() {
            @Override
            public void onClick(TextItem textItem) {
                didClickedChangeMaster = true;
                startActivity(new Intent(SettingsActivity.this, AuthorizeActivity.class));
            }
        }));


        addItem(new HeaderItem(this).setTitle(getString(R.string.puff_secure_keyboard)));
        addItem(new TextItem(this, "ime").setTitle(getString(R.string.enable_puff_secure_keyboard)). setOnclick(new TextItem.OnClickListener() {
            @Override
            public void onClick(TextItem textItem) {
                startActivity(new Intent(Settings.ACTION_INPUT_METHOD_SETTINGS));
                Toast.makeText(SettingsActivity.this, getString(R.string.please_enable_puf_ime), Toast.LENGTH_LONG).show();
            }
        }));


        addItem(new HeaderItem(this).setTitle(getString(R.string.database)));
        addItem(new TextItem(this, "database").setTitle(getString(R.string.export_database))
                .setSubtitle(getString(com.infonium.password.R.string.database_file_can_be_used))
                .setOnclick(new TextItem.OnClickListener() {
            @Override
            public void onClick(TextItem textItem) {

                new AlertDialog.Builder(SettingsActivity.this).setTitle(getString(R.string.export_database))
                        .setMessage(com.infonium.password.R.string.confrim_export_database)
                        .setCancelable(false)
                        .setPositiveButton(com.infonium.password.R.string.yes, new DialogInterface.OnClickListener() {
                            @Override
                            public void onClick(DialogInterface d, int which) {
                                d.dismiss();
                                dialog = ResUtil.getInstance(null).showProgressbar(SettingsActivity.this);
                                DBExportRunnable runnable = new DBExportRunnable(SettingsActivity.this);
                                new Thread(runnable).run();
                            }
                        })
                        .setNegativeButton(com.infonium.password.R.string.cancel, new DialogInterface.OnClickListener() {
                            @Override
                            public void onClick(DialogInterface dialog, int which) {
                                dialog.dismiss();
                            }
                        }).show();

            }
        }));


        addItem(new HeaderItem(this).setTitle(getString(R.string.about)));
        addItem(new TextItem(this, "about").setTitle(getResources().getString(R.string.about_puff_title)).setOnclick(new TextItem.OnClickListener() {
            @Override
            public void onClick(TextItem textItem) {
                startActivity(new Intent(SettingsActivity.this, AboutActivity.class));
            }
        }));

    }

    @Override
    public StorageInterface initStorageInterface() {
        return UserDefault.getInstance(this);
    }


    @Override
    public void onResume() {
        super.onResume();
        quickSwitcher.updateTitle(UserDefault.getInstance(null).hasQuickPassword()
                ? getString(R.string.disable_gesture_lock)
                : getString(R.string.enable_gesture_lock));
    }

    @Override
    public void onStop() {
        super.onStop();
        EventBus.getDefault().unregister(this);
    }


    public void onEventMainThread(Object event) {
//        if (!(event instanceof DBExportEvent)) {
//            return;
//        }
        if (event instanceof CryptoEvent && didClickedChangeMaster) {
            didClickedChangeMaster = false;
            if (((CryptoEvent) event).getType() == AppConstants.TYPE_MASTERPWD) {
                Intent intent = new Intent(SettingsActivity.this, SetMasterPasswordActivity.class);
                intent.putExtra("showMode", SetMasterPasswordActivity.ShowMode.ShowModeChange);
                intent.putExtra("oldPassword", ((CryptoEvent) event).getResult());
                UserDefault.getInstance(null).clearQuickPassword();
                AccountHelper.getInstance(null).clearQuickAccount();
                startActivity(intent);
            }
            return;
        }
        if (dialog != null) {
            dialog.dismiss();
        }
        if (!(event instanceof DBExportEvent)) {
            return;
        }
        DBExportEvent dbExportEvent = (DBExportEvent) event;
        if (dbExportEvent.success) {
            new AlertDialog.Builder(this)
                    .setTitle(R.string.success_em)
                    .setMessage(getString(R.string.database_exported_to)
                                    + dbExportEvent.filePath)
                    .setPositiveButton(R.string.ok, new DialogInterface.OnClickListener() {
                        @Override
                        public void onClick(DialogInterface dialog, int which) {
                            dialog.dismiss();
                        }
                    })
                    .show();
        } else {
            new AlertDialog.Builder(this).setTitle(R.string.failed_em)
                    .setMessage(R.string.please_try_again)
                    .setPositiveButton(R.string.ok, new DialogInterface.OnClickListener() {
                        @Override
                        public void onClick(DialogInterface dialog, int which) {
                            dialog.dismiss();
                        }
                    })
                    .show();
        }
    }

    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        if (requestCode != RequestCodeSetMainPassword ) {
            return;
        }
        if (resultCode != RESULT_OK) {
            UserDefault.getInstance(null).clearQuickPassword();
        } else {
            UserDefault.getInstance(null).setHasQuickPassword();
        }
    }

}

When i extend AppcompatActivity as a Super Class, error gets removed except addItem of MaterialSettings which is abstract class.

When i extend MaterialSettings as a Super Class, said error is generated.

I am designing an Settings Page in Android. Also tried javah in External Tools and also changed latest version to 28.+ and 27.1.1 for appcompact but still no error resolved.

Kindly guide me where and what i need to update or change.

Inheriting AppCompatActivity - Error Looks Like This

Inheriting MaterialSettings - Error Looks Like This

Answer 1

Material Settings is a 3rd party library which extends from ActionBarActivity. However, ActionBarActivity is deprecated and should not be used anymore. In order to support action bar in your activity, you should extend from AppCompatActivity.

I suggest do not use a 3rd party, unmaintained library for such a purpose. Instead, implement your own settings screen. If you do not know how to do that, you can find lots of tutorials online. Here is one for your reference: https://medium.com/@JakobUlbrich/building-a-settings-screen-for-android-part-1-5959aa49337c