Part 13 - Passing Data To Next Activity - Method Two

 Java part : 

package first.learn.datapassingtwo;

import androidx.appcompat.app.AppCompatActivity;

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

public class MainActivity extends AppCompatActivity {

    EditText etOne, etTwo;
    Button btnSimpleInt,
    btnSimpleString;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        etOne = (EditText) findViewById(R.id.etOne);
        etTwo = (EditText) findViewById(R.id.etTwo);

        btnSimpleInt = (Button)findViewById(R.id.btnSimpleInt);
        btnSimpleString = (Button)findViewById(R.id.btnSimpleString);


        btnSimpleString.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {

                String s = etOne.getText().toString();

                if(TextUtils.isEmpty(s)){

                    etOne.setError("Empty");
                    return;
                }

                etOne.setError(null);

                Intent intent = new Intent(MainActivity.this, DataGettingActivity.class);

                intent.putExtra("SimpleString",s );

                startActivity(intent);



            }
        });


        btnSimpleInt.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {

                String s = etTwo.getText().toString();
                if(TextUtils.isEmpty(s)){
                    etTwo.setError("Empty");
                    return;
                }

                etTwo.setError(null);


                int p = -0;

                try {
                    p = Integer.parseInt(s);
                } catch (NumberFormatException e) {
                    throw new RuntimeException(e);
                }

                if(p==-0){

                    Toast.makeText(MainActivity.this, "Please Write Valid Number", Toast.LENGTH_SHORT).show();
                    return;

                }

                Intent intent = new Intent(MainActivity.this, DataGettingActivity.class);
                intent.putExtra("SimpleInt", p);
                startActivity(intent);


            }
        });




    }





}

Xml Part : 

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MainActivity"
    android:orientation="vertical"
    android:layout_margin="16dp">

    <EditText
        android:hint="Simple String....."
        android:layout_marginTop="20dp"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:id="@+id/etOne"/>


    <Button
        android:layout_marginTop="20dp"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:id="@+id/btnSimpleString"
        android:text="Button Simple String"/>


    <EditText
        android:hint="Simple int ....."
        android:layout_marginTop="20dp"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:id="@+id/etTwo"
        android:inputType="number"/>


    <Button
        android:layout_marginTop="20dp"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:id="@+id/btnSimpleInt"
        android:text="Button Simple Integer"/>



</LinearLayout>

Java Part 2 : 

package first.learn.datapassingtwo;

import androidx.appcompat.app.AppCompatActivity;

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

public class DataGettingActivity extends AppCompatActivity {


    TextView tvShow;

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

        tvShow = (TextView) findViewById(R.id.tvShow);

        if(getIntent()!=null){

           if(getIntent().getStringExtra("SimpleString")!=null){

               String s = getIntent().getStringExtra("SimpleString");

               tvShow.setText(s);

           }

        }



        if(getIntent()!=null){

            if(getIntent().getIntExtra("SimpleInt", -0)!=-0){

                int p = getIntent().getIntExtra("SimpleInt", -25);
                tvShow.setText(""+p);

            }


        }



    }



}

Xml Part 2 : 

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".DataGettingActivity"
    android:orientation="vertical"
    android:layout_margin="16dp">


    <TextView
        android:hint="Data....."
        android:textSize="30dp"
        android:textColor="@color/purple_700"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:id="@+id/tvShow"
        />




</LinearLayout>