Unable To Display Textview On Button Click In Android

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

Solution 1:

Try like this :

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

@OverridepublicvoidonCreate(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());
   TextViewtextView=newTextView(this);
   textView.setText("Text New");
}

private OnClickListener onClick() {
   returnnewOnClickListener() {
    @OverridepublicvoidonClick(View v) {
        lLayout.addView(createTextView(lEditText.getText().toString()));
    }
};
}

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

Solution 2:

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