DDM 2022-11-23

<?xml version="1.0" encoding="utf-8"?>
<!-- nav_menu.xml -->
<menu
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto">
    <item
        app:showAsAction="always"
        android:title="menu"
        >
        <menu>
            <item
                android:icon="@drawable/ic_baseline_file_download_off_24"
                android:id="@+id/idMenuItemLoad"
                android:title="@string/strMenuItemLoad"/>
            <item
                android:icon="@drawable/ic_baseline_save_24"
                android:id="@+id/idMenuItemSave"
                android:title="@string/strMenuItemSave"/>
            <item
                android:id="@+id/idMenuItemGoSettings"
                android:title="@string/strMenuItemGoSettings"
                />

            <item
                android:id="@+id/idMenuItemQuitApp"
                android:title="@string/strMenuItemQuitApp"
                />

            <item
                android:icon="@drawable/ic_baseline_clear_24"
                android:id="@+id/idMenuItemClear"
                android:title="@string/strMenuItemClear"/>
        </menu>
    </item>
</menu>
*****************************************************
//PassGen.java
package com.joythis.android.passwordsgenerator;

import androidx.annotation.NonNull;
import androidx.appcompat.app.AppCompatActivity;

import android.app.Activity;
import android.content.Context;
import android.content.Intent;
import android.content.SharedPreferences;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.view.View;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.ListView;
import android.widget.TextView;
import android.widget.Toast;

import java.util.ArrayList;
import java.util.HashSet;
import java.util.Set;

public class PassGen extends AppCompatActivity {

    public final static String PASSWORDS_DB = "PWDS.DB";

    public final static String SETTINGS_DB = "SETTINGS.DB";
    public final static String KEY_BCL = "KEY_BCL";
    public final static String KEY_BSL = "KEY_BSL";
    public final static String KEY_BDigits = "KEY_BD";
    public final static String KEY_SS = "KEY_SS";
    public final static String KEY_SIZE = "KEY_SIZE";

    public final static int DEFAULT_SIZE = 16;
    public final static boolean DEFAULT_BCL = true;
    public final static boolean DEFAULT_BSL = true;
    public final static boolean DEFAULT_BDigits = true;
    //public final static String DEFAULT_SS = "???";

    Context mContext;
    Activity mSelfActivity;
    SharedPreferences mSp;

    TextView mTvCurrentSettings;

    Button mBtnGenPass;
    ListView mLvPasswords; //visualização
    ArrayAdapter<String> mAd; //intermediação
    ArrayList<String> mPwds; //dados

    View.OnClickListener mClickHandler =
    new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            String p =
            AmRandomTools.randomPassword(
                miSize,
                mbCL,
                mbSL,
                mbDigits,
                mSpecialSymbols
            );
            if(p.length()>0) {
                mPwds.add(0, p);
                mAd.notifyDataSetChanged();
            }
            else{
                Toast t = Toast.makeText(
                    mSelfActivity,
                    "Must accept at least 1 type of symbols.",
                    Toast.LENGTH_LONG
                );
                t.show();
            }
        }//onClick
    };//OnClickListener

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        //setContentView(R.layout.activity_pass_gen);
        setContentView(R.layout.rl_pass_gen_v1);

        init();
    }//onCreate

    void init(){
        //1 - assocs
        mSelfActivity = this;
        mContext = this;
        mTvCurrentSettings = findViewById(R.id.idTvCurrentSettings);

        mSp = this.getSharedPreferences(
            SETTINGS_DB,
            MODE_PRIVATE
        );

        mSpPwds = this.getSharedPreferences(
            PASSWORDS_DB,
            MODE_PRIVATE
        );


        mBtnGenPass = findViewById(
            R.id.idBtnGenPass
        );
        mLvPasswords = findViewById(
            R.id.idLvPasswords
        );

        //2 behaviors
        if(mBtnGenPass!=null)
            mBtnGenPass.setOnClickListener
                (mClickHandler);

        if(mLvPasswords!=null){
            mPwds = new ArrayList<String>();
            mAd = new ArrayAdapter<String>(
                mContext,
                android.R.layout.simple_list_item_1,
                mPwds
            );
            mLvPasswords.setAdapter(mAd);
        }

        //3
        loadSettingsFromSP();
    }//init

    int miSize;
    boolean mbCL, mbSL, mbDigits;
    String mSpecialSymbols;
    public void loadSettingsFromSP(){
        if (mSp!=null){
            // leitura
            miSize = mSp.getInt(KEY_SIZE, DEFAULT_SIZE);
            mbCL = mSp.getBoolean(KEY_BCL, DEFAULT_BCL);
            mbSL = mSp.getBoolean(KEY_BSL, DEFAULT_BSL);
            mbDigits = mSp.getBoolean(KEY_BDigits, DEFAULT_BDigits);
            mSpecialSymbols = mSp.getString(KEY_SS, getString(R.string.strSSDefault));

            String strDashboard =
            String.format(
                "size:%d CL:%s SL:%s D:%s SS:%s",
                    miSize,
                mbCL ? "YES" : "NO",
                mbSL ? "YES" : "NO",
                mbDigits ? "YES" : "NO",
                    mSpecialSymbols
            );
            mTvCurrentSettings.setText(strDashboard);
        }
    }//loadSettingsFromSP

    @Override
    public boolean onCreateOptionsMenu(Menu pMenu) {
        MenuInflater minf = this.getMenuInflater();

        minf.inflate(
            R.menu.nav_menu,
            pMenu
        );

        return super.onCreateOptionsMenu(pMenu);
    }//onCreateOptionsMenu

    // menu items' behavior
    @Override
    public boolean onOptionsItemSelected(@NonNull MenuItem item) {
        switch(item.getItemId()){
            case R.id.idMenuItemLoad:
                actionLoad();
                break;
            case R.id.idMenuItemSave:
                actionSave();
                break;
            case R.id.idMenuItemClear:
                actionClear();
                break;

            case R.id.idMenuItemGoSettings:
                actionGoSettings();
                break;
            case R.id.idMenuItemQuitApp:
                actionQuitApp();
                break;
        }//switch

        return super.onOptionsItemSelected(item);
    }//onOptionsItemSelected

    void actionGoSettings(){
        Intent goSettings = new Intent(
            PassGen.this,
            PassSettings.class
        );
        if(goSettings!=null){
            startActivity(goSettings);
        }//if
    }//actionGoSettings

    void actionQuitApp(){
        Intent quit = new Intent(Intent.ACTION_MAIN);
        if (quit!=null){
            quit.addCategory(Intent.CATEGORY_HOME);
            quit.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
            startActivity(quit);
            this.finish();
        }
    }//actionQuitApp

    /*
    MANUTENÇÃO DE ESTADO
     */

    /*
    O que não quisermos perder
    da visualização na interface
    deve ser preservado agora
     */
    public final static String KEY_PWDS = "KEY_PWDS";
    @Override
    protected void onSaveInstanceState(@NonNull Bundle outState) {
        // escrever na Bundle, em chave adequada
        // a lista das passwords
        if(outState!=null) {
            outState.putStringArrayList(
                    KEY_PWDS,
                    mPwds
            );
        }//if
        super.onSaveInstanceState(outState);
    }//onSaveInstanceState

    SharedPreferences mSpPwds;

    int limparTodasAsPasswordsEmSP(){
        SharedPreferences.Editor ed = mSpPwds.edit();
        if(ed!=null){
            int iQuantasDestruidas = mPwds.size();
            mPwds.clear(); //limpa em RAM
            Set<String> vazio = new HashSet<>();
            ed.putStringSet(KEY_PWDS, vazio); //limpa em memória não-volátil
            ed.commit();
            mAd.notifyDataSetChanged();
            return iQuantasDestruidas;
        }
        return 0;
    }//limparTodasAsPasswordsEmSP

    int gravarTodasAsPasswordsEmSP(){
        SharedPreferences.Editor ed = mSpPwds.edit();
        if (ed!=null){
            Set<String> stringSetPwds =
                new HashSet<>();
            stringSetPwds.addAll(mPwds);
            ed.putStringSet(
                KEY_PWDS,
                stringSetPwds
            );
            ed.commit();
            return stringSetPwds.size(); //2022-11-23
        }//if ok SharedPreferences
        return 0;
    }//gravarTodasAsPasswordsEmSP

    int recuperarTodasAsPasswordsDeSP(){
        if(mSpPwds!=null){
            Set<String> stringSetPwds =
            mSpPwds.getStringSet(KEY_PWDS, null);
            mPwds.clear();
            mPwds.addAll(stringSetPwds);
            mAd.notifyDataSetChanged();
            return stringSetPwds.size();
        }
        return 0;
    }//recuperarTodasAsPasswordsDeSP

    /*
    automaticamente chamado para recuperar
    dados preservados pelo sistema nalguma Bundle
     */
    @Override
    protected void onRestoreInstanceState(@NonNull Bundle savedInstanceState) {
        if(savedInstanceState!=null){
            boolean bKeyPwdsExists =
                savedInstanceState.containsKey(KEY_PWDS);
            if(bKeyPwdsExists){
                ArrayList<String> al =
                savedInstanceState.getStringArrayList(
                    KEY_PWDS
                );
                //mPwds = al;
                if(al!=null && al.size()>0){
                    mPwds.clear();
                    mPwds.addAll(al);
                    /*
                    for(String p : al){
                        mPwds.add(p);
                    }
                     */
                }
                mAd.notifyDataSetChanged();
            }//if
        }
        super.onRestoreInstanceState(savedInstanceState);
    }

    void actionLoad(){
        int iQuantas = recuperarTodasAsPasswordsDeSP();
        String strMsg = String.format(
            "%d password(s) loaded",
            iQuantas
        );
        Toast t = Toast.makeText(
            this,
            strMsg,
            Toast.LENGTH_LONG
        );
        t.show();
    }//actionLoad

    void actionSave(){
        int iQuantas = gravarTodasAsPasswordsEmSP();
        String strMsg = String.format(
            "%d passwords saved",
            iQuantas
        );
        Toast t = Toast.makeText(
            this,
            strMsg,
            Toast.LENGTH_LONG
        );
        t.show();
    }//actionSave

    void actionClear(){
        int iQuantas = limparTodasAsPasswordsEmSP();
        String strMsg = String.format(
            "%d passwords cleared.",
            iQuantas
        );
        Toast t = Toast.makeText(
            this,
            strMsg,
            Toast.LENGTH_LONG
        );
        t.show();
    }//actionClear
}//PassGen