Java – textview confirmation location

I'm trying to make an Android code that provides different work for each button

So when the user presses button 1, the textview field provides "you pressed button 1"

My question is about the correct place. I can instantiate textview only once, because the only working place is in the button1 function

Java code for a single button:

public void Button1(View view) {
        final TextView textView=(TextView)findViewById(R.id.textView2);
        textView.setText("You clicked the button 1");

    }

Total java code

public class MainActivity extends AppCompatActivity {
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
        setSupportActionBar(toolbar);
        FloatingActionButton fab = (FloatingActionButton)   findViewById(R.id.fab);
        fab.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                Snackbar.make(view,"Replace with your own action",Snackbar.LENGTH_LONG)
                        .setAction("Action",null).show();
            }
        });


    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.menu_main,menu);
        return true;
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        // Handle action bar item clicks here. The action bar will
        // automatically handle clicks on the Home/Up button,so long
        // as you specify a parent activity in AndroidManifest.xml.
        int id = item.getItemId();

        //noinspection SimplifiableIfStatement
        if (id == R.id.action_settings) {
            return true;
        }

        return super.onOptionsItemSelected(item);
    }

    public void Button1(View view) {
        final TextView textView=(TextView)findViewById(R.id.textView2);
        textView.setText("You clicked the button 1");

    }
    public void Button2(View view) {
        final TextView textView=(TextView)findViewById(R.id.textView2);

        textView.setText("You clicked the button 2");
    }
    public void Button3(View view) {
        final TextView textView=(TextView)findViewById(R.id.textView2);

        textView.setText("You clicked the button 3");
    }
    public void Button4(View view) {
        final TextView textView=(TextView)findViewById(R.id.textView2);

        textView.setText("You clicked the button 4");

    }
    public void Button5(View view) {
        final TextView textView=(TextView)findViewById(R.id.textView2);

        textView.setText("You clicked the button 5");
    }
    public void Button6(View view) {
        final TextView textView=(TextView)findViewById(R.id.textView2);

        textView.setText("You clicked the button 6");
    }
}

Total XML code

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout 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:id="@+id/RelativeLayoutID"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    app:layout_behavior="@string/appbar_scrolling_view_behavior"
    tools:context="com.example.sherifsaleh.xmllayout.MainActivity"
    tools:showIn="@layout/activity_main"
    >

    <Button
        android:id="@+id/button3"
        android:onClick="Button3"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="3"
        android:layout_above="@+id/button6"
        android:layout_alignLeft="@+id/button6"
        android:layout_alignStart="@+id/button6" />

    <Button
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:onClick="Button6"
        android:text="6"
        android:id="@+id/button6"
        android:layout_below="@+id/button2"
        android:layout_alignLeft="@+id/button9"
        android:layout_alignStart="@+id/button9" />

    <Button
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="9"
        android:id="@+id/button9"
        android:onClick="Button9"
        android:layout_alignTop="@+id/button8"
        android:layout_toRightOf="@+id/button8"
        android:layout_toEndOf="@+id/button8" />

    <Button
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="8"
        android:id="@+id/button8"
        android:layout_below="@+id/button5"
        android:layout_toRightOf="@+id/button4"
        android:layout_toEndOf="@+id/button4"
        android:onClick="Button8"/>

    <Button
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="2"
        android:onClick="Button2"
        android:id="@+id/button2"
        android:layout_above="@+id/button5"
        android:layout_toRightOf="@+id/button1"
        android:layout_toEndOf="@+id/button1" />

    <Button
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:onClick="Button5"
        android:text="5"
        android:id="@+id/button5"
        android:layout_below="@+id/button1"
        android:layout_toRightOf="@+id/button1"
        android:layout_toEndOf="@+id/button1" />

    <Button
        android:id="@+id/button1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="1"
        android:onClick="Button1"
        android:layout_above="@+id/button4"
        android:layout_alignLeft="@+id/button4"
        android:layout_alignStart="@+id/button4" />

    <Button
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="4"
        android:id="@+id/button4"
        android:layout_above="@+id/button7"
        android:layout_alignLeft="@+id/button7"
        android:layout_alignStart="@+id/button7" />

    <Button
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="7"
        android:id="@+id/button7"
        android:layout_alignParentBottom="true"
        android:layout_alignLeft="@+id/textView2"
        android:layout_alignStart="@+id/textView2"
        android:layout_marginBottom="90dp" />

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:textIsSelectable="true"
        android:text="New Text"
        android:id="@+id/textView2"
        android:layout_alignParentTop="true"
        android:layout_centerHorizontal="true"
        android:layout_marginTop="80dp"
        android:textSize="50dp"/>
</RelativeLayout>

Solution

Try this

public class MainActivity extends AppCompatActivity {

private TextView textView;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    textView = (TextView)findViewById(R.id.textView2);
    ....
}

And your button click method is

public void Button1(View view) {
    textView.setText("You clicked the button 1");
}