Unable to display textview on button click in android

Question

I want to create this textview, and then display it after this button is clicked, but no textview is displayed.

I dont't want to use findViewById(), if possible, because I want to create a new textview every time the button is pressed. I've tried making a linear layout first, but I've seen a lot of websites say that you don't need to, and I would prefer not to. Any advice would be helpful. Thank you.

EditText name=layout.findViewById(R.id.enterName);
        final String Name=name.getText().toString();
        Button create=layout.findViewById(R.id.create);
        create.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                TextView ProgrammaticallyTextView = new TextView(MainActivity.this);
                ProgrammaticallyTextView.setText(Name);
                ProgrammaticallyTextView.setTextSize(22);
                popup.dismiss();
            }
        });

There are no error messages and the logcat doesn't say that anything is wrong.

you don't seem to add to anyview myLayout.addView(ProgrammaticallyTextView); — JCDecary, Jun 07 '19 at 18:48
Did you try calling findViewById for textView in setOnClickListener and setting the text — p_anantha, Jun 07 '19 at 18:50
check this out: https://stackoverflow.com/questions/4203506/how-to-add-a-textview-to-a-linearlayout-dynamically-in-android — Shermano, Jun 07 '19 at 19:03

score 1 · Answer 1 · answered Jun 07 '19 at 19:11

Try like this :

private LinearLayout lLayout;
private EditText lEditText;
private Button lButton;

@Override
public void onCreate(Bundle savedInstanceState) {
   super.onCreate(savedInstanceState);
   setContentView(R.layout.main);
   lLayout = (LinearLayout) findViewById(R.id.linearLayout);
   lButton = (Button) findViewById(R.id.button); 
   lEditText = (EditText) findViewById(R.id.editText);
   lButton.setOnClickListener(onClick());
   TextView textView = new TextView(this);
   textView.setText("Text New");
}

private OnClickListener onClick() {
   return new OnClickListener() {
    @Override
    public void onClick(View v) {
        lLayout.addView(createTextView(lEditText.getText().toString()));
    }
};
}

private TextView createTextView(String text) {
   final LayoutParams loutParams = new 
   LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);
   final TextView textView = new TextView(this);
   textView.setLayoutParams(loutParams );
   textView.setText("Text is " + text);
   return textView;
}

score 0 · Answer 2 · answered Jun 07 '19 at 19:06

Use the activity's findViewById() method to reference your layout views. For example, you can replace

EditText name=layout.findViewById(R.id.enterName);
Button create=layout.findViewById(R.id.create);

with

EditText name=getActivity().findViewById(R.id.enterName); 
Button create=getActivity().layout.findViewById(R.id.create);

Note: if you are not using fragments then there is no need to use getActivity since findViewById() is a method of the superclass AppCompactActvity( or Activity).

I guess your code is not working because the Button View and Editext Views have not been reference when activity starts for the oncreate() method

Unable to display textview on button click in android

2 Answers2

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