//program 2 calculator
package com.girish.simplecalculator;

import androidx.appcompat.app.AppCompatActivity;

import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;

public class MainActivity extends AppCompatActivity implements View.OnClickListener {
    Button but_Add,but_Sub,but_Mul,but_Div;
    EditText txt_Num1,txt_Num2;
    TextView txt_Res;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        but_Add = (Button) findViewById(R.id.butAdd);
        but_Sub = (Button) findViewById(R.id.butSub);
        but_Mul = (Button) findViewById(R.id.butMul);
        but_Div = (Button) findViewById(R.id.butDiv);

        txt_Num1 = (EditText) findViewById(R.id.txtNum1);
        txt_Num2 = (EditText) findViewById(R.id.txtNum2);

        txt_Res = (TextView) findViewById(R.id.txtResult1);

        but_Add.setOnClickListener(this);
        but_Sub.setOnClickListener(this);
        but_Mul.setOnClickListener(this);
        but_Div.setOnClickListener(this);

    }

    @Override
    public void onClick(View v) {
        double op1 = Double.parseDouble(txt_Num1.getText().toString());
        double op2 = Double.parseDouble(txt_Num2.getText().toString());
        double Res;

        if(v.equals(but_Add))
            Res = op1 + op2;
        else if(v.equals(but_Sub))
            Res = op1 - op2;
        else if(v.equals(but_Mul))
            Res = op1 * op2;
        else if(v.equals(but_Div))
            Res = op1 / op2;
        else Res = 0;

        txt_Res.setText(String.valueOf(Res));


    }
}

//prog 3 signup
# login.java
package com.girish.signup;

import androidx.appcompat.app.AppCompatActivity;

import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;

import java.util.regex.Matcher;
import java.util.regex.Pattern;

public class MainActivity extends AppCompatActivity implements View.OnClickListener {
    EditText txtUsername;
    EditText txtPassword;
    Button btnSignup;
    String regularExpression = "^(?=.*[A-Z])(?=.*[a-z])(?=.*\\d)(?=.*[@$!])[A-Za-z\\d@$!]{8,}$";

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        txtUsername = (EditText) findViewById(R.id.txt_login_username);
        txtPassword = (EditText) findViewById(R.id.txt_login_password);
        btnSignup = (Button) findViewById(R.id.btn_login_signup);
        btnSignup.setOnClickListener(this);
    }

    public void onClick(View v) {
        String username = txtUsername.getText().toString();
        String password = txtPassword.getText().toString();
        if (validatePassword(password)) {
            Bundle bundle = new Bundle();
            bundle.putString("user", username);
            bundle.putString("pass", password);
            Intent it = new Intent(this, Login.class);
            it.putExtra("data", bundle);
            startActivity(it);
        } else {
            Toast.makeText(getBaseContext(), "Invalid Password", Toast.LENGTH_LONG).show();
        }
    }

    private boolean validatePassword(String password) {
        Pattern pattern = Pattern.compile(regularExpression);
        Matcher matcher = pattern.matcher(password);
        return matcher.matches();
    }
}
#login.java
package com.girish.signup;

import androidx.appcompat.app.AppCompatActivity;

import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;

public class Login extends AppCompatActivity implements View.OnClickListener {

    EditText txtLoginUsername,txtLoginPassword;
    Button btnLogin;

    String user,pass;
    int count = 0;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_login);

        txtLoginUsername = (EditText) findViewById(R.id.txt_login_username);
        txtLoginPassword = (EditText) findViewById(R.id.txt_login_password);
        btnLogin = (Button) findViewById(R.id.btn_login_signup);
        btnLogin.setOnClickListener(this);

        Bundle bundle = getIntent().getBundleExtra("data");
        user = bundle.getString("user");
        pass = bundle.getString("pass");

    }

    @Override
    public void onClick(View v) {
        String user1 = txtLoginUsername.getText().toString();
        String pass1 = txtLoginPassword.getText().toString();

        if(user.equals(user1)&&pass.equals(pass1)) {
            Toast.makeText(this,"Login Successful",Toast.LENGTH_LONG).show();
        }
        else {
            count++;
            if(count == 3)
            {
                btnLogin.setEnabled(false);
                Toast.makeText(this,"Failed Login Attempts",Toast.LENGTH_LONG).show();
            }
            else {
                Toast.makeText(this,"Login Failed"+count,Toast.LENGTH_LONG).show();
            }
        }

    }
}

//prog4 wallpaper
package com.girish.wallpaper;

import androidx.appcompat.app.AppCompatActivity;

import android.app.WallpaperManager;
import android.graphics.BitmapFactory;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;

import java.io.IOException;
import java.util.Random;
import java.util.Timer;
import java.util.TimerTask;

public class MainActivity extends AppCompatActivity implements View.OnClickListener {

    Button btn;
    boolean running;
    int[] ia = new int[]{R.drawable.img1,R.drawable.img2,R.drawable.img3,R.drawable.img4,R.drawable.img5};

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        btn = (Button) findViewById(R.id.btn_wall);
        btn.setOnClickListener(this);
    }

    @Override
    public void onClick(View v) {
        if(!running){
            new Timer().schedule(new MyTimer(),0,1000);
            running = true;

        }
    }

    private class MyTimer extends TimerTask {

        @Override
        public void run() {
            try{
                WallpaperManager wallpaperManager = WallpaperManager.getInstance(getBaseContext());
                Random random = new Random();
                wallpaperManager.setBitmap(BitmapFactory.decodeResource(getResources(),ia[random.nextInt(5)]));
            } catch (IOException e) {

            }
        }
    }
}

//prog5 counter
package com.girish.counterapplication;

import androidx.appcompat.app.AppCompatActivity;

import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;

public class MainActivity extends AppCompatActivity implements View.OnClickListener {
TextView lblCounter;
Button btnStart,btnStop;
int counter = 0;
boolean running = false;

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

        lblCounter = (TextView) findViewById(R.id.lbl_text);
        btnStart = (Button) findViewById(R.id.btn_start);
        btnStop = (Button) findViewById(R.id.btn_stop);
        btnStart.setOnClickListener(this);
        btnStop.setOnClickListener(this);
    }


    @Override
    public void onClick(View v) {
        if(v.equals(btnStart)){
            counter = 0;
            running = true;
            new MyCounter().start();
        } else if (v.equals(btnStop)) {
            running = false;
            }
    }


    Handler handler = new Handler()
    {
        public void handleMessage(Message m)
        {
            lblCounter.setText(String.valueOf(m.what));
        }
    };
     class MyCounter  extends Thread{
      public void run(){
          while(running){
              counter++;
              handler.sendEmptyMessage(counter);
              try{
                  Thread.sleep(1000);
              }
              catch (Exception e){ }
          }
      }
    }
}

//prog6 xml & json
#mainactiviy.JAVA
package com.girish.parsingxmljson;

import androidx.appcompat.app.AppCompatActivity;

import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;

public class MainActivity extends AppCompatActivity implements View.OnClickListener {

    Button btnParseXml,btnParseJson;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        btnParseXml = (Button) findViewById(R.id.btn_parsexml);
        btnParseJson = (Button) findViewById(R.id.btn_parsejson);

        btnParseXml.setOnClickListener(this);
        btnParseJson.setOnClickListener(this);
    }

    @Override
    public void onClick(View v) {
        if(v.equals(btnParseJson)){
            Intent it = new Intent(this,ViewActivity.class);
            it.putExtra("mode",1);
            startActivity(it);
        }
       else  if(v.equals(btnParseXml)){
            Intent it = new Intent(this,ViewActivity.class);
            it.putExtra("mode",2);
            startActivity(it);
        }
    }
}
#viewactiviy.java
package com.girish.parsingxmljson;

import androidx.appcompat.app.AppCompatActivity;

import android.annotation.SuppressLint;
import android.os.Bundle;
import android.widget.TextView;

import org.json.JSONException;
import org.json.JSONObject;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;

import java.io.IOException;
import java.io.InputStream;

import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;

public class ViewActivity extends AppCompatActivity {

    TextView lblXmlData,lblJsonData;
    int mode = 0;
    @SuppressLint("MissingInflatedId")
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_view);

        lblXmlData = (TextView) findViewById(R.id.lbl_xml_data);
        lblJsonData = (TextView) findViewById(R.id.lbl_json_data);

        mode = getIntent().getIntExtra("mode",0);
        if(mode == 1)
            parseJson();
        else
            parseXml();

    }

    private void parseXml() {
        try{
            InputStream is = getAssets().open("input.xml");
            DocumentBuilderFactory db = DocumentBuilderFactory.newInstance();
            DocumentBuilder b = db.newDocumentBuilder();
            Document doc = b.parse(is);
            Element e = doc.getDocumentElement();
            e.normalize();

            NodeList list = doc.getElementsByTagName("weather");
            for(int i = 0; i<list.getLength();i++){
                Node n = list.item(i);
                if(n.getNodeType() == Node.ELEMENT_NODE){
                    Element e1 = (Element)n;
                    lblXmlData.setText("City Name:"+getValue("city_name", e1)+"\n");
                    lblXmlData.append("Latitude:"+getValue("Latitude",e1)+"\n");
                    lblXmlData.append("Longitude:"+getValue("Longitude",e1)+"\n");
                    lblXmlData.append("Temperature:"+getValue("Temperature",e1)+"\n");
                    lblXmlData.append("Humidity:"+getValue("Humidity",e1)+"\n");

                }
            }
        } catch (Exception e){
            e.printStackTrace();
        }


    }

    private String getValue(String tag, Element e) {
        NodeList nl = e.getElementsByTagName(tag).item(0).getChildNodes();
        Node node = nl.item(0);
        return node.getNodeValue();
    }

    private void parseJson() {
        try {
            InputStream ip = getAssets().open("input.json");
            byte[] data = new byte[ip.available()];
            ip.read(data);

            String readData = new String(data);
            JSONObject jo = new JSONObject(readData);
            JSONObject jo1 = jo.getJSONObject("weather");
            lblJsonData.setText("city_name:" + jo1.getString("city_name") + "\n");
            lblJsonData.append("Latitude:" + jo1.getString("Latitude") + "\n");
            lblJsonData.append("Longitude:" + jo1.getString("Longitude") + "\n");
            lblJsonData.append("Temperature:" + jo1.getString("Temperature") + "\n");
            lblJsonData.append("Humidity:" + jo1.getString("Humidity") + "\n");
        } catch (JSONException ex) {
            throw new RuntimeException(ex);
        } catch (IOException ex) {
            throw new RuntimeException(ex);
        }
    }
}
#input.json
{
  "weather": {
    "city_name": "Ballari",
    "Latitude": "12.295",
    "Longitude": "76.639",
    "Temperature": "22",
    "Humidity": "90%"
  }
}
#input.xml
<?xml version="1.0" ?>
<records>
    <weather>
        <city_name>Ballari</city_name>
        <Latitude>12.295</Latitude>
        <Longitude>76.639</Longitude>
        <Temperature>22</Temperature>
        <Humidity>90%</Humidity>
    </weather>
</records>

//prog7 text to speech
#mainactivity.java
package com.girish.texttospeech;

import androidx.appcompat.app.AppCompatActivity;

import android.os.Bundle;
import android.speech.tts.TextToSpeech;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
import android.widget.Toast;

import java.util.Locale;

public class MainActivity extends AppCompatActivity implements View.OnClickListener, TextToSpeech.OnInitListener {
EditText txt;
Button btnSp;
TextToSpeech txtSp;

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

        txt = (EditText) findViewById(R.id.editText);
        btnSp = (Button) findViewById(R.id.btn_speak);

        btnSp.setOnClickListener(this);
        txtSp = new TextToSpeech(getBaseContext(),this);
        txtSp.setLanguage(Locale.UK);
    }

    @Override
    public void onClick(View v) {
        String text = txt.getText().toString();
        txtSp.speak(text,TextToSpeech.QUEUE_FLUSH,null);
    }

    @Override
    public void onInit(int status) {
        if(status!= TextToSpeech.ERROR){
            Toast.makeText(getBaseContext(),"Success",Toast.LENGTH_LONG).show();
        }
    }
}

//prog8 call & save
#mainactivity.java
package com.girish.cs;

import androidx.appcompat.app.AppCompatActivity;

import android.content.Intent;
import android.net.Uri;
import android.os.Bundle;
import android.provider.ContactsContract;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;

public class MainActivity extends AppCompatActivity implements View.OnClickListener {


    Button btnOne, btnTwo, btnThree, btnFour, btnFive, btnSix, btnSeven, btnEight, btnNine, btnZero;
    Button btnSave, btnDel, btnStar, btnHash, btnCall;
    EditText txtPhone;

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

        btnOne = (Button) findViewById(R.id.btn_one);
        btnOne.setOnClickListener(this);

        btnTwo = (Button) findViewById(R.id.btn_two);
        btnTwo.setOnClickListener(this);

        btnThree = (Button) findViewById(R.id.btn_three);
        btnThree.setOnClickListener(this);

        btnFour = (Button) findViewById(R.id.btn_four);
        btnFour.setOnClickListener(this);

        btnFive = (Button) findViewById(R.id.btn_five);
        btnFive.setOnClickListener(this);

        btnSix = (Button) findViewById(R.id.btn_six);
        btnSix.setOnClickListener(this);

        btnSeven = (Button) findViewById(R.id.btn_seven);
        btnSeven.setOnClickListener(this);

        btnEight = (Button) findViewById(R.id.btn_eight);
        btnEight.setOnClickListener(this);

        btnNine = (Button) findViewById(R.id.btn_nine);
        btnNine.setOnClickListener(this);

        btnZero = (Button) findViewById(R.id.btn_zero);
        btnZero.setOnClickListener(this);

        btnSave = (Button) findViewById(R.id.btn_save);
        btnSave.setOnClickListener(this);

        btnCall = (Button) findViewById(R.id.btn_call);
        btnCall.setOnClickListener(this);

        btnHash = (Button) findViewById(R.id.btn_hash);
        btnHash.setOnClickListener(this);

        btnStar = (Button) findViewById(R.id.btn_star);
        btnStar.setOnClickListener(this);

        btnDel = (Button) findViewById(R.id.btn_delete);
        btnDel.setOnClickListener(this);

        txtPhone = (EditText) findViewById(R.id.txt_phonenumber);
        txtPhone.setText("");
    }

    @Override
    public void onClick(View v) {
        if (v.equals(btnOne))
            txtPhone.append("1");
        else if (v.equals(btnTwo))
            txtPhone.append("2");
        else if (v.equals(btnThree))
            txtPhone.append("3");
        else if (v.equals(btnFour))
            txtPhone.append("4");
        else if (v.equals(btnFive))
            txtPhone.append("5");
        else if (v.equals(btnSix))
            txtPhone.append("6");
        else if (v.equals(btnSeven))
            txtPhone.append("7");
        else if (v.equals(btnEight))
            txtPhone.append("8");
        else if (v.equals(btnNine))
            txtPhone.append("9");
        else if (v.equals(btnZero))
            txtPhone.append("0");
        else if (v.equals(btnHash))
            txtPhone.append("#");
        else if (v.equals(btnStar))
            txtPhone.append("*");

        else if (v.equals(btnSave)) {
            Intent contactIntent = new Intent(ContactsContract.Intents.Insert.ACTION);
            contactIntent.setType(ContactsContract.RawContacts.CONTENT_TYPE);
            contactIntent.putExtra(ContactsContract.Intents.Insert.NAME, "Parveen");
            contactIntent.putExtra(ContactsContract.Intents.Insert.PHONE, txtPhone.getText().toString());
            startActivity(contactIntent);
        } else if (v.equals(btnDel)) {
            String data = txtPhone.getText().toString();

            if (data.length() > 0)
                txtPhone.setText(data.substring(0, data.length() - 1));
            else
                txtPhone.setText("");
        }
        btnCall.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                String data = txtPhone.getText().toString();
                Intent i = new Intent(Intent.ACTION_DIAL);
                i.setData(Uri.parse("tel:" + data));
                startActivity(i);
            }
        });
    }
}