Part 15 - Data Passing Between Activities By Static Variable - Method Three And Four

 Java part One : 

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 {

    public  static String SIMPLE_STRING = null;
    public  static  int  SIMPLE_INT = -0;

    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);

                SIMPLE_STRING = s ;

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

                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;

                }


                SIMPLE_INT = p ;

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

                startActivity(intent);


            }
        });




    }





}

xml part One : 

<?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 Static 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 Static Integer"/>









</LinearLayout>

java part Two : 

package first.learn.datapassingtwo;

import static first.learn.datapassingtwo.MainActivity.SIMPLE_INT;
import static first.learn.datapassingtwo.MainActivity.SIMPLE_STRING;

import androidx.appcompat.app.AppCompatActivity;

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

public class DataGettingActivity extends AppCompatActivity {


    TextView tvShow;

    private String private_simple_string = null;
    private  int private_int = -0;

    @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);

            }

        }


     if(SIMPLE_STRING!=null){

         tvShow.setText(SIMPLE_STRING);
         private_simple_string = SIMPLE_STRING;
         System.out.println("Taken STATIC String first : " + SIMPLE_STRING);


         SIMPLE_STRING = null;

         tvShow.setText(private_simple_string );

         System.out.println("Taken Private String : " + private_simple_string);
         System.out.println("Taken Static  String : " + SIMPLE_STRING);


         Toast.makeText(this, "Found : "+private_simple_string, Toast.LENGTH_SHORT).show();


     }


        if(SIMPLE_INT!=-0){

           private_int = SIMPLE_INT ;
           System.out.println("Static Int First : "+ SIMPLE_INT);

           SIMPLE_INT = -0 ;
           tvShow.setText(""+private_int);
           System.out.println("Static Int Second : "+ SIMPLE_INT);
           System.out.println(" private Int  : "+ private_int);

        }






    }



}

xml Part Two : 

<?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>