How to change text from java code?

Question

Excuse me if this is an easy problem. I have been unable to find an answer so far.I have followed this tutorial( https://www.youtube.com/watch?v=fn5OlqQuOCk ) to create a pop up window. While it works as intended I want to change the text when the button is pressed from the java code.

To be more specific, I have a string array and whenever the button is pressed I want it to show a random element of the array. How can I go about doing those things?

My onCreate method is(mundaneLoot is the id of the button):

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

    Button b = (Button)findViewById(R.id.mundaneLoot);


    b.setOnClickListener(new View.OnClickListener(){
        @Override
        public void onClick(View v) {
            startActivity(new Intent(MainActivity.this, Pop.class ));
        }

    });

}

My xml code for the pop up window (which essentially is a new activity) is:

<TextView
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:textAppearance="?android:attr/textAppearanceLarge"
    android:text="Pop up window"
    android:id="@+id/textView"
    android:layout_gravity="center_horizontal"
    android:layout_centerVertical="true"
    android:layout_centerHorizontal="true" />

I want to edit the android:text="Pop up window" from the java code.

@SagarNayak as I've stated in my question I followed a tutorial where I create a pop up as a new activity. — Marios Ath
– Marios Ath, Commented Apr 7, 2016 at 13:17
So the activity in which you are showing popup is ??? and the activity from which you want to change its text is ???? (please give names of the activity ) — Sagar Nayak
– Sagar Nayak, Commented Apr 7, 2016 at 13:38

Niels Masdorp · Accepted Answer · 2016-04-07 13:11:45Z

2

If your pop-up dialog is an Activity, you can pass in a value to that Activity through your Intent. You can do so like this.

Intent intent = new Intent(MainActivity.this, Pop.class);
intent.putExtra("value", randomValueFromArray);
startActivity(intent);

You can then get the value from the Intent in the onCreate() of your Pop class.

Bundle bundle = getIntent().getExtras();
editText.setText(bundle.getString("value"));

If you want to know how to get a random value from an ArrayList, you could use something like this.

String text = list.get((new Random()).nextInt(list.size()));

answered Apr 7, 2016 at 13:11

Niels Masdorp

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appersiano · Accepted Answer · 2016-04-07 13:08:32Z

1

Go on the onCreate method of the Pop class and then

TextView popUpMessage = (TextView) findViewById(R.id.textView);
popUpMessage.setText("Example");

answered Apr 7, 2016 at 13:08

appersiano

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Comments

Jhaman Das · Accepted Answer · 2016-04-07 13:05:07Z

-1

Use editText Like this:

EditText editText;

In on create bind the editText like this

editText = (EditText) findViewById(R.id.editText);
editText.setText("YOUR_TEXT");

answered Apr 7, 2016 at 13:05

Jhaman Das

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